Falling mechanism for battery module, battery pack and new energy automobile

Abstract

The invention relates to a falling mechanism for a battery module, a battery pack and a new energy automobile, and belongs to the technical field of new energy automobiles. The movable plate is connected to the fixed plate in a sliding manner, and a clamping part for clamping a battery module is arranged on the movable plate; and the release assembly is arranged on the fixed plate and is used for driving the movable plate so that the clamping part is separated from the battery module. The falling-off mechanisms are arranged on the two sides of the battery module, so that the stable fixation of the battery module in a non-thermal runaway state can be realized. When a thermal runaway signal is detected, the release assembly can drive the movable plate to slide and be away from the battery module, so that the clamping part is separated from the battery module, and the battery module is separated. According to the scheme, rapid physical separation is realized by ingeniously utilizing a clamping structure, so that the thermal runaway module can be rapidly separated, a heat conduction path is effectively blocked, the combustion risk of the whole vehicle is reduced, and meanwhile, the economical requirement that only a fault module needs to be replaced during maintenance is met.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a battery module detachment mechanism, a battery pack, and a new energy vehicle. Background Technology

[0002] During the rapid development of new energy vehicles, the problem of battery pack thermal runaway has not been fundamentally solved. Moreover, with the significant increase in battery pack energy density, the fire caused by battery pack thermal runaway is difficult to control, and may even cause occupant injury or death and significant property damage.

[0003] Research on thermal runaway and thermal diffusion in new energy vehicle battery packs has been conducted for many years. From individual cells to modules to the entire battery pack, there are relevant research results and applications across various dimensions. However, the most cost-effective solution is still to ensure that conscious and untrapped occupants have sufficient time to evacuate before the vehicle catches fire. This often fails to guarantee the safety of occupants trapped or disabled in major traffic accidents.

[0004] Large-scale thermal runaway of a battery pack, or even the destruction of the entire vehicle, is mostly caused by the failure of a small module, which then spreads to nearby modules, leading to a chain reaction of thermal diffusion and ultimately causing the entire battery pack to catch fire and explode. Therefore, when a cell fails, quickly separating its module from the surrounding modules ensures the safety of other modules except those affected by thermal runaway. Repairs only require replacing the module containing the thermally runaway cell, significantly reducing losses.

[0005] Furthermore, existing firefighting equipment has limited effectiveness in extinguishing thermal runaway battery packs. In most cases of thermal runaway in new energy vehicle battery packs, the entire vehicle is ultimately destroyed, and the fire often causes additional property damage, such as damage to nearby vehicles. Therefore, it is necessary to research and improve the existing structure to provide a battery module detachment mechanism, battery pack, and new energy vehicle, with the aim of achieving greater practical value. Summary of the Invention

[0006] To address the shortcomings or deficiencies mentioned in the background technology above, this application provides a detachment mechanism for battery modules, a battery pack, and a new energy vehicle, which can separate thermally runaway battery modules, prevent thermal runaway from affecting other normally functioning battery modules, and improve the safety of new energy vehicle use.

[0007] In a first aspect, embodiments of this application provide a detachment mechanism for a battery module, comprising: Fixing plate; A movable plate is slidably connected to the fixed plate, and the movable plate is provided with a snap-fit ​​part for snapping the battery module; A release component, disposed on the fixed plate, is used to drive the movable plate to disengage the latching portion from the battery module.

[0008] In one aspect, in some embodiments, the active plate is provided with a separation component for disconnecting the busbar from the battery module.

[0009] In one aspect, in some embodiments, the separating component includes a nail-removing plate connected to the movable plate and extending away from the fixed plate, the nail-removing plate being provided with nail-removing cutting edges facing the movable plate.

[0010] In one aspect, in some embodiments, the movable plate is connected to a pressure plate extending away from the fixed plate.

[0011] In one aspect, in some embodiments, the lower surface of the pressure plate is an upwardly inclined slope.

[0012] In one aspect, in some embodiments, the movable plate is provided with an elastic element on the side facing away from the fixed plate for pulling down the pressure plate.

[0013] In some embodiments, the latching portion includes four latching blocks respectively connected to the four corners of the movable plate.

[0014] In some embodiments, the movable plate and the fixed plate are parallel to each other, the fixed plate is provided with a guide groove for accommodating the movable plate, and the release component is disposed in the guide groove.

[0015] In one aspect, in some embodiments, the release component includes an airbag connected between the fixed plate and the movable plate, the airbag inflating and deflating to drive the movable plate toward or away from the battery module.

[0016] In some embodiments, the fixed plate is connected to ear plates at both ends, and the ear plates on both sides extend toward the side where the movable plate is located, and mounting holes are provided on the ear plates on both sides.

[0017] Secondly, embodiments of this application provide a battery pack, including: The housing has an internal cavity and a module drop hole at the bottom that communicates with the cavity. The detachment mechanism for the battery module described in any of the above claims is disposed in the cavity, and the fixing plate of the detachment mechanism is fixedly connected to the housing. A battery module is located inside the cavity. The battery module has a detachment mechanism on both sides and a mating part that engages with the snap-fit ​​parts of the detachment mechanisms on both sides.

[0018] Secondly, in some embodiments, the battery module is connected to a busbar by a pin, and the movable plate of the detachment mechanism is provided with a separation component for pulling out the pin.

[0019] Secondly, in some embodiments, the pin includes a pressure cap for pressing the busbar, and a rod that passes through the busbar and is inserted into the battery module, the rod having an interference fit section for connecting to the battery module; The separation assembly includes a nail-removing plate connected to the movable plate and extending away from the fixed plate. The nail-removing plate is provided with a nail-removing cutting edge facing the movable plate. The nail-removing cutting edge pries up the pressure cap by inserting into the bottom surface of the pressure cap, so that the interference fit section of the rod body is disengaged from the battery module.

[0020] Secondly, in some embodiments, the bottom edge of the pressure cap is chamfered, and the chamfer is used to guide the nail-pulling blade to be inserted from the outside of the bottom surface of the pressure cap to pry the pressure cap.

[0021] Secondly, in some embodiments, the mating part includes slots disposed at the four corners of the battery module, and the slots match the snap-fit ​​blocks of the snap-fit ​​part.

[0022] Secondly, in some embodiments, the bottom of the battery module is connected to a bottom guard plate that matches the module drop hole, and a stop block for limiting the bottom guard plate is connected to the bottom wall of the inner cavity of the housing. The four edges of the bottom guard plate are provided with sealing strips that cooperate with the module drop hole.

[0023] Thirdly, embodiments of this application provide a new energy vehicle, including: The battery pack described in any of the above.

[0024] The beneficial effects of the technical solution provided in this application include: In a first aspect, embodiments of this application provide a detachment mechanism for a battery module, comprising a fixed plate; a movable plate slidably connected to the fixed plate, the movable plate having a latching part for latching the battery module; and a release component disposed on the fixed plate for driving the movable plate to disengage the latching part from the battery module.

[0025] Therefore, by installing detachment mechanisms on both sides of the battery module, the battery module can be securely fixed in a non-thermal runaway state. When a thermal runaway signal is detected, the release component can drive the movable plate to slide away from the battery module, causing the locking part to separate from the battery module, thus detaching the battery module. This solution cleverly utilizes the locking structure to achieve rapid physical separation, allowing the thermal runaway module to detach quickly, effectively blocking the heat conduction path, reducing the risk of vehicle combustion, and simultaneously meeting the economic requirement of only replacing the faulty module during maintenance.

[0026] Secondly, embodiments of this application provide a battery pack, including a housing with an internal cavity and a module drop hole communicating with the cavity at the bottom; the aforementioned battery module detachment mechanism is disposed within the cavity, and the fixing plate of the detachment mechanism is fixedly connected to the housing; the battery module is located within the cavity, and detachment mechanisms are provided on both sides of the battery module, and the battery module is provided with mating parts that respectively cooperate with the snap-fit ​​parts of the detachment mechanisms on both sides.

[0027] Because the battery module employs a dual-sided detachment mechanism design, a directional outlet channel for the thermal runaway module is formed through the module drop-out hole at the bottom of the battery pack casing and the cavity. Therefore, when thermal runaway of the module is triggered, the detachment mechanisms on both sides release simultaneously, allowing the module to be discharged from the drop-out hole and physically separated from the vehicle system by gravity. This solution can shorten the thermal runaway isolation response time while ensuring the module's fixation strength, enabling rapid module detachment and significantly reducing the probability of thermal diffusion.

[0028] Thirdly, this application provides a new energy vehicle that uses the aforementioned battery pack. Therefore, when thermal runaway of a single cell is detected, the module containing the thermally runaway cell can be disconnected from the surrounding modules in advance, enabling the battery pack to actively remove the thermally runaway module. This reduces the associated losses caused by thermal runaway and improves the overall vehicle safety performance by blocking the heat propagation path. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the exploded structure of the detachment mechanism according to an embodiment of this application; Figure 2 This is a schematic diagram of the detachment mechanism according to an embodiment of this application; Figure 3 This is a schematic diagram of the battery pack structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the shell structure according to an embodiment of this application; Figure 5 This is a schematic diagram showing the distribution of battery modules within the battery pack according to an embodiment of this application; Figure 6 This is a schematic diagram showing the connection between the detachment mechanism and the battery module in an embodiment of this application; Figure 7 This is a schematic diagram showing the connection between the busbar and the battery module in an embodiment of this application; Figure 8 This is a schematic diagram of the cooperation between the bottom guard plate and the stop block in an embodiment of this application.

[0031] The attached diagram lists the components represented by each number as follows: 1. Fixed plate; 11. Guide groove; 12. Ear plate; 2. Movable plate; 21. Snap-fit ​​part; 22. Nail puller plate; 221. Nail puller blade; 23. Nail presser plate; 24. Elastic element; 3. Release assembly; 4. Housing; 41. Module drop hole; 5. Battery module; 51. Mating part; 6. Pin; 61. Presser cap; 62. Rod body; 7. Busbar; 8. Bottom guard plate; 9. Stop block; 10. Battery management system; 20. Battery energy distribution unit. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] To address the shortcomings or deficiencies mentioned in the background technology above, this application provides a detachment mechanism for battery modules, a battery pack, and a new energy vehicle, which can separate thermally runaway battery modules, prevent thermal runaway from affecting other normally functioning battery modules, and improve the safety of new energy vehicle use.

[0034] See Figures 1 to 8 As shown, a first aspect of this application provides a detachment mechanism for a battery module, comprising: Fixing plate 1; The movable plate 2 is slidably connected to the fixed plate 1, and the movable plate 2 is provided with a snap-fit ​​part 21 for snapping the battery module 5. Release component 3, which is mounted on fixed plate 1, is used to drive movable plate 2 to disengage the snap-fit ​​part 21 from battery module 5.

[0035] The detachment mechanism of this embodiment is disposed on both sides of the battery module 5, and the battery module 5 is stably fixed in a non-thermal runaway state through a snap-fit ​​structure. When a thermal runaway signal is detected, the release component 3 drives the movable plate 2 to slide away from the battery module 5, so that the snap-fit ​​part 21 is detached from the battery module 5, thereby achieving rapid physical separation.

[0036] This design cleverly utilizes a modular snap-fit ​​structure to significantly shorten the thermal runaway isolation response time while ensuring the module's fixed strength. This effectively blocks the heat conduction path, reduces the risk of vehicle combustion, and meets the economic requirement of only needing to replace the faulty module during maintenance.

[0037] For example, the detachment mechanism is symmetrically installed on the left and right sides of a single battery module 5 inside the battery pack. The fixing plate 1 is fixedly connected to the battery pack housing 4 by screws or welding. The movable plate 2 is slidably connected to the fixing plate 1 through the guide groove 11, and its locking part 21 matches and locks with the mating part 51 (such as the slot) of the battery module 5. The release component 3 can be a hydraulic cylinder or a pneumatic cylinder. Under normal conditions, it pushes the movable plate 2 to clamp the module by pressurization. When thermal runaway is triggered, it drives the movable plate 2 to slide away from the module by releasing pressure.

[0038] Once the latching part 21 disengages, the battery module 5 is discharged along the module drop hole 41 under the influence of gravity, achieving physical isolation from the vehicle system. The edge of the module drop hole 41 at the bottom of the battery pack can be fitted with guide plates extending to the perimeter of each individual module. This ensures that the battery module 5 falls towards the module drop hole 41 under gravity and is discharged from it, preventing the detached module from horizontally shifting, getting stuck, or colliding with other components, thus avoiding secondary risks.

[0039] It should be noted that the core function of the release component 3 is to drive the movable plate 2 to move and release the connection between the latching part 21 and the battery module 5. Therefore, it can be understood that other release components 3 that can achieve this function can be used in this application. Those skilled in the art can make adaptive adjustments to the size, shape and material of the release component 3 according to the usage scenario and test conditions to adapt to the structure of different battery packs.

[0040] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module, wherein the movable plate 2 of the detachment mechanism for the battery module is provided with a separation component for disconnecting the busbar 7 from the battery module 5.

[0041] In the detachment mechanism of this application embodiment, a separation component is provided on the movable plate 2. This separation component actively intervenes to disconnect the electrical connection between the busbar 7 and the battery module 5. Since the battery modules 5 are usually electrically connected through the busbar 7, if the busbar 7 is not disconnected in time during the detachment process of the thermal runaway module, the following problems will occur: Connection obstruction risk: The fixing structure between busbar 7 and the module (such as the interference fit pin 6) is difficult to disengage instantly when impacted, and may get stuck on the module, preventing it from being discharged from the bottom of the battery pack; Chain damage risk: Fragments of broken busbar 7 may affect adjacent intact battery modules 5 due to splashing or stress transmission, or even cause a short circuit; Response delay risk: The fracture of copper busbar 7 requires time to accumulate, which may prolong the response cycle of thermal runaway isolation.

[0042] To address the aforementioned issues, the disconnect component can achieve a fast and controlled disconnection operation through the following design: For example, busbar 7 is fastened to the terminal of battery module 5 by pin 6, with pin 6 having an interference fit with the module to ensure electrical connection stability. The separation assembly can employ a hydraulic pin puller, using high-pressure fluid to push the pin puller to remove pin 6 from the module, or an electric shears, using rotating blades to cut the busbar 7 body. Furthermore, the separation assembly can also incorporate a shape memory alloy drive component, which automatically deforms upon heating to release the pin 6 constraint, or a cutting device can precisely cut the busbar 7, reducing the impact of stress diffusion on adjacent modules.

[0043] It should be noted that the core function of the separation component is to disconnect the electrical connection between the busbar 7 and the battery module 5, and its specific form can be adjusted according to actual operating conditions. For example, if the busbar 7 adopts a threaded connection, the separation component can be replaced by an electric loosening device; if the busbar 7 is integrated into the module housing 4, the separation component can be designed as a shearing mechanism triggered by thermal expansion materials. Those skilled in the art can adaptively optimize the driving method, action sequence, and disconnection force of the separation component based on the structural strength of the battery pack, the material properties of the busbar 7, and the impact load of thermal runaway scenarios to ensure the reliability and safety of the disconnection operation.

[0044] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module. The separation component of the detachment mechanism for a battery module includes a nail-removing plate 22 connected to a movable plate 2 and extending away from the fixed plate 1. The nail-removing plate 22 is provided with a nail-removing cutting edge 221 facing the movable plate 2.

[0045] In the detachment mechanism of this application embodiment, the setting of the nail-removing plate 22 realizes the synchronous disconnection of the electrical connection when the battery module 5 is detached. When the movable plate 2 slides away from the battery module 5, the nail-removing plate 22 moves accordingly and uses the nail-removing blade 221 to pry the cap 61 of the pin 6 between the busbar 7 and the battery module 5, so that the pin 6 is loosened, thereby ensuring that the busbar 7 can separate from the battery module 5 when the battery module 5 falls, and avoiding module jamming due to electrical connection obstruction.

[0046] For example, the nail-removing plate 22 and the movable plate 2 can be fixedly connected by welding or bolts. In this embodiment, the nail-removing plate 22 and the movable plate 2 are integrally formed, and its extension direction is consistent with the sliding direction of the movable plate 2, ensuring the synchronicity of the nail-removing action and the disengagement of the module.

[0047] After installation, the bottom surface of the nail-removing plate 22 extends horizontally to the upper surface of the busbar 7. A rectangular through hole is provided on the nail-removing plate 22. After installation, the pressure cap 61 of the pin 6 is located in the through hole. The side of the through hole facing the movable plate 2 is inclined. The inclined surface and the bottom surface of the nail-removing plate 22 form a nail-removing cutting edge 221 facing the movable plate 2. When the movable plate 2 slides in the fixed plate 1 and moves away from the battery module 5, the nail-removing cutting edge 221 of the nail-removing plate 22 can be inserted into the bottom surface of the pressure cap 61 and pry the pressure cap 61, so that the pin 6 is loosened. Under the action of gravity, the battery module 5 smoothly separates from the busbar 7 and the pin 6.

[0048] It should be noted that the role of the nail-removing plate 22 in this application is to move with the movable plate 2 and use the nail-removing blade 221 to pry the pressure cap 61, so that the pin 6 connecting the busbar 7 and the battery module 5 is loosened. Therefore, it is understood that those skilled in the art can make adaptive adjustments to the size, shape and material of the nail-removing plate 22 and the nail-removing blade 221 according to the usage scenario and test conditions.

[0049] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery module detachment mechanism, wherein a pressure nail plate 23 extending away from the fixed plate 1 is connected to the movable plate 2 of the battery module detachment mechanism.

[0050] In the detachment mechanism of this application embodiment, a pressure pin plate 23 is connected to the side of the movable plate 2 facing away from the fixed plate 1. The pressure pin plate 23 forms surface contact with the pressure cap 61 of the pin 6 through its bottom. By utilizing the squeezing force generated when the movable plate 2 moves towards the battery module 5, the pressure cap 61 is pressed and fixed in the connection hole between the busbar 7 and the battery module 5, thereby increasing the axial constraint force of the pin 6.

[0051] This design, by actively applying preload, can prevent the electrical connection between the busbar 7 and the module from shifting due to vibration or impact, thus ensuring the electrical stability of the battery module 5 during vehicle operation.

[0052] For example, the pressure plate 23 and the movable plate 2 can be connected by an elastic hinge structure. The bottom surface of the pressure plate 23 can be provided with arc-shaped protrusions or wavy textures to form contact with the surface of the pressure cap 61 to enhance friction. The extension length of the pressure plate 23 can be adjusted according to the internal space of the battery pack. For example, in a scenario where the module thickness is 150mm, the length of the pressure plate 23 can be designed to be 80 to 120mm.

[0053] When the movable plate 2 slides toward the module under normal conditions, the pressure plate 23 adjusts its angle adaptively through the elastic hinge structure to ensure the concentricity of the pressure cap 61 and the connection hole. When thermal runaway is triggered, the movable plate 2 moves in the opposite direction, and the pressure plate 23 moves away from the pressure cap 61, reserving space for the operation of separating the components.

[0054] It should be noted that the function of the pressure plate 23 in this application is to maintain the connection stability between the pin 6 and the busbar 7 through the compressive force. Therefore, it is understood that those skilled in the art can optimize the contact area, extension direction, and elastic hinge parameters of the pressure plate 23 according to the connection strength requirements between the busbar 7 and the module, the geometry of the pressure cap 61 (such as a plane or a sphere), and the internal stress distribution of the battery pack.

[0055] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module, wherein the lower surface of the pressure plate 23 of the detachment mechanism for the battery module is an upwardly inclined slope.

[0056] In the detachment mechanism of this application embodiment, the lower surface of the pressure plate 23 is designed as an upwardly inclined slope structure. When the movable plate 2 slides and approaches the battery module 5, the slope of the pressure plate 23 and the pressure cap 61 of the pin 6 form a wedge-shaped contact interface. The horizontal sliding force is decomposed into a pre-tightening force in the vertical direction, which presses down on the pressure cap 61, thereby increasing the axial constraint force of the pin 6.

[0057] For example, in this embodiment, the nail presser plate 23 and the nail remover plate 22 are both integrally formed with the movable plate 2. The nail presser plate 23 is inclined and horizontal. The nail presser plate 23 is located above the nail remover plate 22 and together with the nail remover plate 22 forms a V-shaped angle, preferably ranging from 5° to 30°.

[0058] During installation, the inclined surface of the pressure plate 23 faces the surface of the busbar 7, and the pressure cap 61 of the pin 6 is located in the rectangular hole on the pin-removing plate 22. As the pressure plate 23 moves towards the module with the movable plate 2, the contact area between the inclined surface and the pressure cap 61 gradually approaches the movable plate 2, achieving progressive clamping. When the movable plate 2 slides away from the module in the opposite direction, the inclined surface of the pressure plate 23 separates from the pressure cap 61, reserving space for the prying operation of the pin-removing plate 22 and avoiding interference between the two.

[0059] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery module detachment mechanism. The movable plate 2 of the battery module detachment mechanism is provided with an elastic element 24 for pulling down the pressing nail plate 23 on the side facing away from the fixed plate 1.

[0060] In the detachment mechanism of this application embodiment, an elastic element 24 is provided on the side of the movable plate 2 facing away from the fixed plate 1. The elastic element 24 acts on the pressure pin plate 23 with tension, so that it applies a continuous downward preload to the pressure cap 61 of the pin 6 under normal conditions, thereby enhancing the electrical connection stability between the busbar 7 and the battery module 5. This design solves the technical problem of the traditional interference fit pin 6 being prone to loosening under long-term vibration or thermal expansion conditions through the active force application mechanism of the elastic element 24.

[0061] For example, the elastic element 24 can be a helical tension spring, with its two ends connected to the top of the pressure plate 23 and the side of the movable plate 2 respectively by U-shaped hooks, providing a constant clamping force through the elastic deformation of the tension spring. Alternatively, the elastic element 24 can be replaced with a silicone elastic block, which is fixedly connected between the pressure plate 23 and the nail-removing plate 22, using the compression and rebound characteristics of the material itself to pull down the pressure plate 23, thereby increasing the downward pressure of the pressure plate 23 on the pin 6.

[0062] It should be noted that the function of the elastic element 24 in this application is to increase the axial constraint force of the pressure plate 23 on the pin 6 by means of tension. Those skilled in the art can make adaptability adjustments to the elastic coefficient (e.g., the elastic coefficient K of the tension spring is 50 to 100 N / mm), installation direction (lateral / longitudinal) and fixing method (screw / clamp) of the elastic element 24 according to the internal vibration frequency of the battery pack (e.g., 5 to 20 Hz), the connection strength requirements between the busbar 7 and the module (e.g., the preload needs to be ≥100 N), and the relative positional relationship between the pressure plate 23 and the pin-removing plate 22.

[0063] For example, in high-voltage and high-current scenarios, the elastic element 24 can be made of composite materials (such as a metal spring core + silicone outer layer) to balance conductivity and shock absorption; while in low-temperature applications, low-temperature resistant materials (such as fluororubber elastic blocks) can be selected to ensure stable elastic performance.

[0064] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module. The latching part 21 of the detachment mechanism for the battery module includes four latching blocks respectively connected to the four corners of the movable plate 2.

[0065] In the detachment mechanism of this embodiment, four locking blocks are provided on the side of the movable plate 2 away from the fixed plate 1. The locking blocks are rectangular or trapezoidal in shape and symmetrically distributed along the four corners of the movable plate 2. When the movable plate 2 slides towards the battery module 5, the locking blocks form a multi-directional fitting with the slots on the side wall of the battery module 5. Through the contact between the surface of the locking block and the inner wall of the slot, the driving force in the horizontal sliding direction is decomposed into a pressing force in the vertical direction, thereby achieving a stable fixation of the battery module 5 in a non-thermal runaway state.

[0066] This design, by matching the shape of the snap-fit ​​block with the slot, can effectively prevent the module from shifting laterally during vehicle operation (such as centrifugal force when the vehicle is turning), while ensuring that the snap-fit ​​block can quickly slide out of the slot when thermal runaway is triggered, avoiding separation delay due to jamming.

[0067] For example, the depth of the slot matches the thickness of the locking block, preferably 3-5 mm, and the width matches the width of the locking block, ensuring that the locking block forms an interference fit with the inner wall of the slot during insertion. The locking block can be made of high-strength plastic (such as polyetheretherketone) or metal alloy (such as aluminum alloy), and the surface can be provided with friction texture or elastic coating (such as silicone coating) to enhance locking stability.

[0068] It should be noted that the core function of the snap-fit ​​block is to fix the module through multi-directional interlocking and to quickly separate it in the event of thermal runaway. Those skilled in the art can make adaptation adjustments to the tilt angle (e.g., 15° to 25°), slot depth, and material of the snap-fit ​​block according to the size of the battery module 5 (e.g., a rectangular module with an aspect ratio of 2:1), vibration frequency (e.g., 8 to 12 Hz), and thermal runaway isolation time requirements.

[0069] For example, in high-temperature conditions, the snap-fit ​​block can be made of heat-resistant materials (such as polyamide) to prevent deformation; while in high-frequency vibration scenarios, elastic buffer pads (such as polyurethane) can be added to the inner wall of the slot to absorb vibration energy and extend the snap-fit ​​life.

[0070] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module. The movable plate 2 of the detachment mechanism for the battery module is parallel to the fixed plate 1. The fixed plate 1 is provided with a guide groove 11 for accommodating the movable plate 2, and the release component 3 is disposed in the guide groove 11.

[0071] In the detachment mechanism of this application embodiment, the movable plate 2 and the fixed plate 1 are parallel to each other. The fixed plate 1 is provided with a guide groove 11. The movable plate 2 is slidably connected in the guide groove 11. The release component 3 is installed in the guide groove 11 to drive the movable plate 2 to slide along the guide groove 11 to approach or move away from the battery module 5.

[0072] For example, the movable plate 2 can be embedded in the slide groove via a slider or ball bearing guide to achieve low-friction sliding along the slide groove direction. The release component 3 is integrated inside the guide slide groove 11 and can push the movable plate 2 to move via a micro hydraulic / pneumatic cylinder, while cooperating with the spring to provide a restoring force, ensuring that the movable plate 2 is in close contact with the side wall of the battery module 5 under normal conditions and quickly detaches when thermal runaway is triggered.

[0073] This design, through the geometric constraints of the guide groove 11 and the driving coordination of the release component 3, can solve the jamming problem caused by insufficient guiding accuracy in traditional sliding structures, while shortening the thermal runaway isolation response time to less than 0.3 seconds.

[0074] Specifically, both the movable plate 2 and the fixed plate 1 are made of aluminum alloy. The depth of the guide groove 11 can be 10 to 15 mm, and its width matches the width of the movable plate 2. The inner wall of the groove can be coated with graphite to reduce the coefficient of friction. The release component 3 uses a miniature pneumatic cylinder, which is controlled by an air circuit to achieve rapid drive. The miniature pneumatic cylinder is inclinedly arranged at the four corners of the movable plate 2, and its two ends are connected to the fixed plate 1 and the movable plate 2 respectively by hinges.

[0075] Meanwhile, small-diameter tension springs are symmetrically installed at the four corners of the movable plate 2. The two ends of the small-diameter tension springs are connected to the fixed plate 1 and the movable plate 2 respectively by hooks. Under normal conditions, the movable plate 2 is pressed tightly by a micro pneumatic cylinder, so that it fits tightly with the module, and the short tension spring between the fixed plate 1 and the movable plate 2 is stretched. When thermal runaway is triggered, the micro pneumatic cylinder exhausts air, the tension spring is reset, and the movable plate 2 is quickly reset.

[0076] It should be noted that the arrangement of the guide slide 11 and the release assembly 3 can be adjusted according to the battery pack space and module size. In addition, the surface of the guide slide 11 can be provided with ball bearing guides or magnetic adsorption structures to further improve the smoothness of sliding.

[0077] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module. The release component 3 of the detachment mechanism for the battery module includes an airbag connected between a fixed plate 1 and a movable plate 2. The airbag drives the movable plate 2 to move closer to or away from the battery module 5 by inflating and deflating.

[0078] In the detachment mechanism of this application embodiment, the release component 3 includes a sheet-like airbag connected between the fixed plate 1 and the movable plate 2. The airbag expands by inflation or contracts by deflation to drive the movable plate 2. The airbag has a ring or rectangular structure and is embedded in the guide groove 11 of the fixed plate 1. Its two sides are fixedly connected to the fixed plate 1 and the movable plate 2 by adhesive layers or mechanical fasteners. The bottom of the airbag is provided with an air pipe interface, and the laterally connected air pipe passes through the fixed plate 1 and is connected to the external inflation / deflation component.

[0079] The inflation / deflation assembly includes a two-way air valve and an electric air pump. The electric air pump inflates the airbag with compressed air through the air tube. The two-way air valve can switch the air tube channel to either an intake or exhaust mode and close the air tube after inflation / deflation to maintain stable pressure inside the airbag and keep the position of the movable plate 2.

[0080] This design solves the response delay problem caused by the complex transmission chain in traditional mechanical locking structures by utilizing the flexible driving characteristics of the airbag, while avoiding potential damage to the internal structure of the battery pack by rigid driving components.

[0081] For example, the airbag is 2 to 5 mm thick and made of silicone rubber or thermoplastic polyurethane (TPU). An anti-stick coating may be applied to the surface to reduce frictional resistance with the movable plate 2. The air tube diameter is preferably 6 to 10 mm, and it is a high-temperature and pressure-resistant flexible tube to ensure normal operation even in thermal runaway scenarios.

[0082] The power of the electric air pump can be adjusted according to the weight of the movable plate 2. For example, in a scenario where the mass of the movable plate 2 is 1.5 to 3 kg, the air pump output pressure range is 0.5 to 1.2 MPa, and the response time is controlled to complete the inflation and deflation within 0.2 seconds.

[0083] In the cooperation structure between the airbag and the guide groove 11, a guide groove can be set in the airbag to guide the airflow to be evenly distributed and avoid the displacement of the movable plate 2 caused by uneven local expansion. In addition, a pressure sensor can be integrated at the connection between the airbag and the movable plate 2 to monitor the pressure change in the airbag in real time and ensure the reliability of the driving process.

[0084] It should be noted that the function of the airbag in this application is to drive the movable plate 2 to move slightly by utilizing its expansion and contraction characteristics after inflation and deflation, and to maintain the position of the movable plate 2 when it is not inflated or deflated. Therefore, it is understood that those skilled in the art can make adaptive adjustments to the size, shape, and material of the airbag according to the usage scenario and testing conditions.

[0085] Firstly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a detachment mechanism for a battery module. Both ends of the fixing plate 1 of the detachment mechanism for the battery module are connected to ear plates 12. Both ear plates 12 extend toward the side where the movable plate 2 is located, and both ear plates 12 are provided with mounting holes.

[0086] In the detachment mechanism of this application embodiment, both ends of the fixing plate 1 are connected to ear plates 12. The ear plates 12 extend toward the side where the movable plate 2 is located, and both ear plates 12 are provided with vertically penetrating mounting holes. Fasteners (such as screws or bolts) can be installed through the mounting holes to achieve a reliable connection between the fixing plate 1 and the battery pack housing 4.

[0087] The connection between the ear plate 12 and the fixing plate 1 can be an integrally formed structure or welded. Its extension direction is parallel to the sliding direction of the movable plate 2, ensuring the stable installation of the fixing plate 1 inside the battery pack cavity. This design solves the stress concentration problem caused by single-point connection in traditional fixing methods through the cooperation between the ear plate 12 and the shell 4. At the same time, the symmetrical layout of the ear plate 12 enhances the bending resistance of the fixing plate 1 and adapts to the complex stress distribution inside the battery pack.

[0088] For example, in this embodiment, both ear plates 12 are formed with one side of the fixing plate 1, and both ear plates 12 extend toward the side where the movable plate 2 is located. Both ear plates 12 are provided with vertically penetrating mounting holes. The battery pack housing 4 is fixed with a baffle that cooperates with the ear plates 12. The baffle has a preset hole position. The fixing plate 1 is vertically held against the bottom wall of the inner cavity of the housing 4. The ear plates 12 can fall on the top surface of the baffle respectively. The ear plates 12 can be fastened to the preset hole position by vertical mounting screws, thereby fixing the fixing plate 1. After installation, the ear plates 12 are located at both ends of the battery module 5 respectively, and can cooperate with the baffle to constrain the battery module 5.

[0089] It should be noted that the core function of the ear plate 12 is to provide a connection point between the fixing plate 1 and the battery pack housing 4, and to constrain the position of the module through the cooperation of the ear plate 12 and the baffle. Those skilled in the art can make adaptation adjustments to the extension length (e.g., 10 to 20 mm), mounting hole shape (e.g., circular, elliptical, or irregular hole), and material (e.g., aluminum alloy or carbon fiber composite material) of the ear plate 12 according to the internal dimensions of the battery pack, the weight of the module, and the impact load in the thermal runaway scenario.

[0090] See Figures 1 to 8 As shown, a second aspect of this application provides a battery pack, including: The housing 4 has an internal cavity and a module drop hole 41 at the bottom that communicates with the cavity; The battery module detachment mechanism of any of the above embodiments is disposed in the cavity, and the fixing plate 1 of the detachment mechanism is fixedly connected to the housing 4. The battery module 5 is located inside the cavity. Both sides of the battery module 5 are provided with a detachment mechanism, and the battery module 5 is provided with a mating part 51 that respectively cooperates with the snap-fit ​​part 21 of the detachment mechanism on both sides.

[0091] In the battery pack of this embodiment, the battery module 5 adopts a double-sided symmetrical detachment mechanism design. A thermal runaway module directional discharge channel is formed between the module drop hole 41 at the bottom of the battery pack housing 4 and the cavity. When thermal runaway of the module is triggered, the detachment mechanisms on both sides release synchronously, allowing the module to be discharged from the drop hole. Physical separation of the module from the vehicle system is achieved through gravity. This solution can shorten the thermal runaway isolation response time while ensuring the module's fixation strength, enabling rapid module detachment and significantly reducing the probability of thermal diffusion.

[0092] Specifically, the bottom wall of the battery pack housing 4 has multiple module drop holes 41. The battery modules 5 housed in the housing 4 correspond one-to-one with the module drop holes 41. Each battery module 5 has a symmetrical installation and detachment mechanism installed on both sides. The fixing plate 1 of the detachment mechanism is fixedly connected to the housing 4. The fixing plate 1 is in contact with the side wall of the battery module 5. At the same time, the movable plate 2 slidably connected inside the fixing plate 1 is held against the side wall of the battery module 5 by the action of the release component 3. Meanwhile, the snap-fit ​​part 21 on the movable plate 2 snaps into the mating part 51 of the battery module 5 to stably hold the battery module 5 above the module drop hole 41.

[0093] When the battery cell in the battery module 5 experiences thermal runaway, the release components 3 in the two-sided detachment mechanism simultaneously drive the two-sided movable plates 2 away from the battery module 5, causing the latching part 21 on the movable plate 2 to disengage from the mating part 51. Under the action of gravity, the battery module 5 is discharged from the module drop hole 41, realizing the physical separation of the battery module 5 from the battery pack.

[0094] Secondly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery pack, in which a busbar 7 is connected to the battery module 5 via a pin 6, and a separation component for pulling out the pin 6 is provided on the movable plate 2 of the detachment mechanism.

[0095] In the battery pack of this application embodiment, the battery modules 5 are connected in series via busbars 7, and the busbars 7 are fastened to the ends of the battery modules 5 by pins 6. A separation component is installed on the movable plate 2 of the detachment mechanism inside the battery pack. The separation component is used to disconnect the busbars 7 from the battery modules 5.

[0096] Since the battery modules 5 are electrically connected to each other through the busbar 7, when a thermally runaway battery module 5 falls, the busbar 7 cannot disconnect from the battery module 5, which will affect the discharge of the battery module 5 from the battery pack. Although the busbar 7 is usually made of copper metal, it is easy to break when subjected to large impacts or stress concentration. However, the impact when the battery module 5 is detached is uncontrollable, and it takes time for the copper busbar to break, which will increase the detachment time of the battery module 5. At the same time, it may pull and affect the intact battery modules 5 on the adjacent side. Therefore, it is necessary to ensure that the busbar 7 is disconnected from the battery module 5 when the battery module 5 is detached.

[0097] For example, the busbar 7 is fastened to the battery module 5 by pins 6. The pins 6 and the battery module 5 are interference-fitted. The separation component can use a hydraulic pin puller to remove the pins 6, or use an electric shear to cut the busbar 7 to disconnect the busbar 7 from the battery module 5.

[0098] It should be noted that the function of the separation component in this application is to disconnect the connection between the busbar 7 and the battery module 5. Therefore, it is understood that other separation components that can achieve this function can be used in this application. Those skilled in the art can make adaptive adjustments to the size, shape and material of the separation component according to the usage scenario and test conditions.

[0099] Secondly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery pack, the pin 6 of which includes a pressure cap 61 for pressing the busbar 7, and a rod 62 that passes through the busbar 7 and is inserted into the battery module 5. The rod 62 is provided with an interference fit section that connects to the battery module 5. The separation assembly includes a nail-removing plate 22 connected to the movable plate 2 and extending away from the fixed plate 1. The nail-removing plate 22 is provided with a nail-removing cutting edge 221 facing the movable plate 2. The nail-removing cutting edge 221 pries up the pressure cap 61 by inserting into the bottom surface of the pressure cap 61, so that the interference fit section of the rod 62 is disengaged from the battery module 5.

[0100] In the battery pack of this application embodiment, the pin 6 for connecting the busbar 7 and the battery module 5 includes an integrally formed pressure cap 61 and a rod 62. The rod 62 is provided with an interference fit section. After the pin 6 is inserted into the busbar 7 and the battery module 5, the interference fit section on the rod 62 is interference-connected with the battery module 5, so that the pressure cap 61 is pressed tightly on the busbar 7.

[0101] The movable plate 2 of the detachment mechanism is connected to a nail-removing plate 22. The nail-removing plate 22 can move with the movable plate 2, so that while the movable plate 2 drives the snap-fit ​​part 21 to detach from the battery module 5, the nail-removing blade 221 of the nail-removing plate 22 pulls out the pin 6 connecting the busbar 7 and the battery module 5. This allows the interference fit section to detach from the battery module 5. At the same time as the battery module 5 is detached, the pin 6 is released, and the busbar 7 can be separated from the battery module 5 without affecting the falling of the battery module 5.

[0102] For example, in this embodiment, the nail-removing plate 22 is integrally formed with the movable plate 2 and is perpendicular to the movable plate 2. After installation, the nail-removing plate 22 can extend horizontally to the upper surface of the busbar 7. A rectangular through hole is provided on the nail-removing plate 22. After the pressure cap 61 of the pin 6 is installed, it is located in the through hole. The side of the through hole facing the movable plate 2 is an inclined surface. The inclined surface and the bottom surface of the nail-removing plate 22 form a nail-removing cutting edge 221 facing the movable plate 2.

[0103] When the movable plate 2 slides within the fixed plate 1 and moves away from the battery module 5, the nail-removing blade 221 of the nail-removing plate 22 can be inserted into the bottom surface of the pressure cap 61 and pry the pressure cap 61. The pressure cap 61 is raised, causing the interference fit section of the rod 62 to disengage from the battery module 5. Under the action of gravity, the battery module 5 disengages from the busbar 7 and the pin 6.

[0104] It should be noted that the nail-removing plate 22 in this embodiment has a certain thickness. When the nail-removing blade 221 of the nail-removing plate 22 is inserted into the bottom surface of the pressure cap 61, the pressure cap 61 can be raised, so that the pin 6 is pulled up to a certain height. The rod body 62 in this embodiment includes an interference fit section and a clearance fit section.

[0105] The interference fit section is located near the pressure cap 61 and is interference-fitted to the assembly hole on the battery module 5 after the pin 6 is installed. When the pressure cap 61 is pulled up a certain height by the pin puller 22, the interference fit section can move upward and disengage from the connection hole of the battery module 5. The remaining clearance fit section of the rod 62 is located inside the connection hole and does not affect the falling of the battery module 5.

[0106] Secondly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery pack, the bottom edge of the pressure cap 61 of the battery pack is chamfered, the chamfer is used to guide the nail-picking blade 221 to be inserted from the outside of the bottom surface of the pressure cap 61 to pry the pressure cap 61.

[0107] In the battery pack of this embodiment, the pin 6 used to connect the busbar 7 and the battery module 5 includes an integrally formed pressure cap 61 and a rod 62. The bottom edge of the pressure cap 61 is chamfered. The chamfer can guide the pin-removing blade 221 to be inserted from the outside of the bottom surface of the pressure cap 61 to pry the pressure cap 61. This can prevent the pressure cap 61 from being too tightly fitted to the busbar 7 after the pin 6 is installed, which would make it difficult for the pin-removing blade 221 of the pin-removing plate 22 to be inserted. This design solves the problem of traditional right-angle pressure caps easily getting stuck by matching the chamfer with the pin-removing blade, and at the same time reduces the scratch damage to the surface of the busbar during the pin removal process.

[0108] For example, the bottom annular chamfer of the pressure cap 61 can be a CNC machined bevel structure with a chamfer depth of 0.5 to 1.5 mm and an angle preferably of 15° to 30°, forming an adaptive guiding fit with the V-shaped groove (angle 25° to 40°) of the nail-starting blade 221.

[0109] The connection between the rod 62 and the pressure cap 61 is provided with a transition fillet to reduce the risk of stress concentration and prevent the pin from breaking due to vibration in the event of thermal runaway. The pin 6 can be made of high-strength copper alloy with a hard oxide coating on the surface to improve wear resistance and ensure reliability after multiple pin removal operations.

[0110] It should be noted that the core function of the chamfer is to guide the insertion of the pin-lifting blade 221 and reduce frictional resistance. Its specific shape can be replaced with an arc-shaped chamfer or a serrated chamfer, as long as it matches the pin-lifting blade. Those skilled in the art can adjust the chamfer angle, transition fillet radius, and pin 6 surface treatment process according to the thickness of the busbar 7 (e.g., 2 to 4 mm), the interference fit strength of the pin 6 (e.g., preload ≥ 80 N), and the movement speed of the pin-lifting plate 22 (e.g., 0.5 to 1.2 m / s).

[0111] For example, under high-temperature conditions, the pressure cap 61 can be coated with a high-temperature resistant ceramic coating to prevent oxidation of the chamfered edge; in high-frequency vibration scenarios, the chamfer can be integrated with an elastic buffer pad to absorb impact energy through flexible materials and extend the service life of the pin 6.

[0112] Secondly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery pack, the mating part 51 of which includes slots disposed at the four corners of the battery module 5, the slots matching the snap-fit ​​blocks of the snap-fit ​​part 21.

[0113] In this embodiment of the application, each of the four corners of the battery module 5 inside the battery pack is provided with a slot. The slot can match the snap-fit ​​block of the snap-fit ​​part 21 to realize the connection between the detachment mechanism and the battery module 5.

[0114] For example, the latching part 21 on the movable plate 2 of the detachment mechanism in this embodiment includes latching blocks provided at the four corners of the movable plate 2. The latching blocks are integrally formed with the movable plate 2 and located on the side of the movable plate 2 away from the fixed plate 1. The nail pressing plate 23 and the nail pulling plate 22 are integrally connected to the connecting block at one corner.

[0115] The battery module 5 has four symmetrically distributed slots at its four corners. During installation, the upper locking block of the movable plate 2 abuts against the bottom and side walls of the upper slot, and the lower locking block abuts against the top and side walls of the lower slot. The two movable plates 2 work together to stably constrain the battery module 5.

[0116] It should be noted that the role of the card slot and the card block in this application is to form a card-connecting structure to constrain the battery module 5. Therefore, it is understood that other card slots and card blocks that can achieve this function can be used in this application. Those skilled in the art can make adaptive adjustments to the size, shape and material of the card slot and card block according to the usage scenario and test conditions.

[0117] Secondly, in some alternative embodiments: see Figures 1 to 8 As shown, this application embodiment provides a battery pack, in which the bottom of the battery module 5 is connected to a bottom guard plate 8 that matches the module drop hole 41, and a stop block 9 for limiting the bottom guard plate 8 is connected to the bottom wall of the inner cavity of the housing 4. The bottom guard plate 8 is provided with a sealing strip that cooperates with the module drop hole 41 around its perimeter.

[0118] In the battery pack of this embodiment, a bottom protective plate 8 is fixedly connected to the bottom of the battery module 5. When the module is operating normally, the bottom protective plate 8 is aligned with the module drop hole 41 at the bottom of the housing 4 to form a sealed mating surface, preventing external foreign objects from entering the inner cavity of the battery pack and avoiding direct exposure of the bottom of the module due to vibration or impact. This design improves the protection level of the battery pack through the covering effect of the bottom protective plate 8, and in the event of thermal runaway, the bottom protective plate 8 can detach with the module when it falls, without affecting the unobstructed flow of the module's discharge path.

[0119] A stop block 9 is fixedly connected to the bottom wall of the inner cavity of the housing 4. The top of the stop block 9 contacts the top surface of the bottom guard plate 8, and the alignment accuracy of the bottom guard plate 8 is ensured by the planar limiting. To enhance the sealing effect, an edge sealing strip is fixedly connected to the four edges of the bottom guard plate 8. The sealing strip has a U-shaped or L-shaped cross section and is made of silicone rubber or EPDM. It fills the gap between the bottom guard plate 8 and the housing 4 through elastic deformation.

[0120] For example, the bottom protective plate 8 is bonded to the bottom of the battery module 5 using a thermally conductive silicone pad. The silicone pad has a thickness of 1.5 to 3 mm and a thermal conductivity ≥1.0 W / (m·K), ensuring efficient heat conduction without affecting the module's slippage. The stop block 9 can be fixed to the bottom wall of the inner cavity of the housing 4 by screws or welding, extending towards the module drop hole 41 to ensure a limited contact area. The distance between the two stop blocks 9 is greater than the width of the battery module 5, so it will not affect the battery module 5's drop. It should be noted that the fit between the bottom protective plate 8 and the stop block 9 can be adjusted according to the inner cavity size of the battery pack and the module weight.

[0121] See Figures 1 to 8 As shown, a third aspect of this application provides a new energy vehicle, including: The battery pack of any of the above embodiments.

[0122] The new energy vehicles in this application adopt the battery pack of any of the above embodiments. The battery status can be monitored in real time by the vehicle control system. When thermal runaway of a single cell is detected, the module containing the thermal runaway cell is disconnected from the surrounding modules in advance, so as to realize the active removal of the thermal runaway module from the battery pack. This not only reduces the cascading losses caused by thermal runaway, but also improves the safety performance of the vehicle by blocking the heat propagation path.

[0123] For example, the battery pack is installed at the bottom of the chassis of a new energy vehicle and integrates a battery management system 10 (BMS) and a battery energy distribution unit 20 (BDU). The BMS monitors the cell status in real time through cell temperature sensors, voltage acquisition modules, and thermal imaging technology, and determines thermal runaway when any of the following combinations of conditions are met: a) The voltage drop of a single cell exceeds 25% of the initial voltage, and the temperature rise rate is ≥1℃ / s for more than 3 seconds; b) The surface temperature of the cell reaches its maximum operating temperature (e.g., 85°C), and the temperature rise rate is ≥1°C / s for more than 3 seconds.

[0124] This judgment logic combines voltage anomalies with dynamic temperature changes to effectively distinguish between occasional faults and actual thermal runaway, reducing the probability of false triggering.

[0125] Upon detection of thermal runaway, the BMS sends a release command to the detachment mechanism via the CAN bus, driving the two movable plates 2 to slide towards the fixed plate 1. During the sliding process, the pressure plate 23 at the bottom of the movable plate 2 disengages from the pin 6 pressure cap 61, while the nail-removing blade 221 of the nail-removing plate 22 inserts into the bottom of the pressure cap 61 and pries it, causing the pin 6 to loosen. The locking blocks at the four corners of the movable plate 2 then exit from the slots on the side wall of the battery module 5.

[0126] This synchronized action ensures that the electrical connection between busbar 7 and the module is disconnected, preventing busbar 7 from breaking or adjacent modules from short-circuiting due to pulling. Finally, the thermal runaway module is discharged from the module drop hole 41 at the bottom of the battery pack under the action of gravity, avoiding impact on other modules. The probability of thermal diffusion can be reduced by more than 70%, and the discharge process will not cause mechanical impact to surrounding modules.

[0127] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0128] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0129] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A detachment mechanism for a battery module, characterized in that, include: Fixing plate (1); The movable plate (2) is slidably connected to the fixed plate (1), and the movable plate (2) is provided with a snap-fit ​​part (21) for snapping the battery module (5). Release component (3), which is disposed on the fixed plate (1), is used to drive the movable plate (2) to disengage the snap-fit ​​part (21) from the battery module (5).

2. The detachment mechanism for a battery module as described in claim 1, characterized in that: The movable plate (2) is provided with a separation component for disconnecting the busbar (7) from the battery module (5).

3. The detachment mechanism for a battery module as described in claim 2, characterized in that: The separation assembly includes a nail-removing plate (22) connected to the movable plate (2) and extending away from the fixed plate (1), the nail-removing plate (22) having a nail-removing cutting edge (221) facing the movable plate (2).

4. The detachment mechanism for a battery module as described in any one of claims 1 to 3, characterized in that: A pressure nail plate (23) extending away from the fixed plate (1) is connected to the movable plate (2).

5. The detachment mechanism for a battery module as described in claim 4, characterized in that: The lower surface of the pressure nail plate (23) is an upwardly inclined slope.

6. The detachment mechanism for a battery module as described in claim 4, characterized in that: The movable plate (2) is provided with an elastic element (24) for pulling down the pressure plate (23) on the side facing away from the fixed plate (1).

7. The detachment mechanism for a battery module as described in claim 1, characterized in that: The latching part (21) includes four latching blocks that are respectively connected to the four corners of the movable plate (2).

8. The detachment mechanism for a battery module as described in claim 1, characterized in that: The movable plate (2) is parallel to the fixed plate (1). The fixed plate (1) is provided with a guide groove (11) to accommodate the movable plate (2). The release component (3) is disposed in the guide groove (11).

9. The detachment mechanism for a battery module as described in claim 1, characterized in that: The release component (3) includes an airbag connected between the fixed plate (1) and the movable plate (2), which drives the movable plate (2) to move closer to or away from the battery module (5) by inflating and deflating the airbag.

10. The detachment mechanism for a battery module as described in claim 1, characterized in that: Both ends of the fixed plate (1) are connected to ear plates (12), and both ear plates (12) extend toward the side where the movable plate (2) is located, and both ear plates (12) are provided with mounting holes.

11. A battery pack, characterized in that, include: The housing (4) has a cavity inside and a module drop hole (41) communicating with the cavity at the bottom. The detachment mechanism for a battery module according to any one of claims 1 to 10, wherein the detachment mechanism is disposed in the cavity and the fixing plate (1) of the detachment mechanism is fixedly connected to the housing (4); The battery module (5) is located in the cavity. The battery module (5) is provided with the detachment mechanism on both sides. The battery module (5) is provided with a mating part (51) that respectively cooperates with the snap-fit ​​part (21) of the detachment mechanism on both sides.

12. The battery pack as claimed in claim 11, characterized in that: The battery module (5) is connected to a busbar (7) by a pin (6), and the movable plate (2) of the detachment mechanism is provided with a separation component for pulling out the pin (6).

13. The battery pack as described in claim 12, characterized in that: The pin (6) includes a pressure cap (61) for pressing the busbar (7) and a rod (62) that passes through the busbar (7) and is inserted into the battery module (5). The rod (62) is provided with an interference fit section that connects to the battery module (5). The separation assembly includes a nail-removing plate (22) connected to the movable plate (2) and extending away from the fixed plate (1). The nail-removing plate (22) is provided with a nail-removing cutting edge (221) facing the movable plate (2). The nail-removing cutting edge (221) prys up the pressure cap (61) by inserting it into the bottom surface of the pressure cap (61) so that the interference fit section of the rod (62) is disengaged from the battery module (5).

14. The battery pack as described in claim 13, characterized in that: The bottom edge of the pressure cap (61) is chamfered, and the chamfer is used to guide the nail-pulling blade (221) to be inserted from the outside of the bottom surface of the pressure cap (61) to pry the pressure cap (61).

15. The battery pack as claimed in claim 11, characterized in that: The mating part (51) includes slots located at the four corners of the battery module (5), and the slots are matched with the snap-fit ​​blocks of the snap-fit ​​part (21).

16. The battery pack as claimed in claim 11, characterized in that: The bottom of the battery module (5) is connected to a bottom guard plate (8) that matches the module drop hole (41). The bottom wall of the inner cavity of the housing (4) is connected to a stop block (9) for limiting the bottom guard plate (8). The four edges of the bottom guard plate (8) are provided with sealing strips that cooperate with the module drop hole (41).

17. A new energy vehicle, characterized in that, include: The battery pack according to any one of claims 11 to 16.

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