Battery pack connecting structure and automobile

Abstract

The embodiment of the invention provides a battery pack connecting structure and an automobile. Relates to the technical field of automobiles. The battery pack connecting structure comprises a battery pack and a plurality of connecting assemblies, wherein a mounting beam is arranged on the battery pack; the connecting assembly comprises a first connecting piece, a second connecting piece, a hydraulic control piece and at least one limiting piece, the first connecting piece is used for being connected with the vehicle body, the second connecting piece is used for being connected with the mounting beam, part of the first connecting piece is inserted into the second connecting piece, and the limiting piece is slidably connected to the first connecting piece and is configured to be connected with the hydraulic control piece. The first connecting piece can be partially moved out to be clamped with the second connecting piece; the hydraulic control piece is connected with the first connecting piece and used for adjusting the limiting piece to be separated from the second connecting piece when the battery pack is subjected to thermal runaway. By means of the battery pack connecting structure, damage to people on the vehicle when the battery pack is in thermal runaway is reduced.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to a battery pack connection structure and an automobile. Background Technology

[0002] Against the backdrop of energy transition and increasing environmental awareness, electric vehicles have emerged as a prominent option. They convert electrical energy into kinetic energy through an electric motor, enabling the vehicle to move.

[0003] In related technologies, battery packs are typically installed at the bottom of the vehicle. This makes full use of the space under the vehicle chassis and avoids encroaching on the interior passenger space and trunk space. The connection between the battery pack and the vehicle body is usually achieved using bolts, which secure the battery pack to the bottom of the vehicle body with multiple bolts.

[0004] However, when the battery pack is in a thermal runaway state such as overcharging, over-discharging, short circuit, or high temperature, the internal temperature of the battery pack rises sharply, which can easily lead to the battery pack catching fire or even exploding, seriously endangering the safety of people in the car. Summary of the Invention

[0005] This application provides a battery pack connection structure and a vehicle to solve the problem that battery pack thermal runaway can seriously endanger the safety of people in the vehicle.

[0006] In a first aspect, embodiments of this application provide a battery pack connection structure, including:

[0007] A battery pack, on which a mounting beam is provided;

[0008] Multiple connecting components, each connecting component including a first connector, a second connector, a hydraulic control component, and at least one limiting component, wherein the first connector is used to connect to the vehicle body, the second connector is used to connect to the mounting beam, a portion of the first connector is inserted into the second connector, the limiting component is slidably connected to the first connector, and the limiting component is configured to be partially removed from the first connector and engaged with the second connector;

[0009] The hydraulic control component is connected to the first connecting component, and the hydraulic control component is used to adjust the limiting component to separate from the second connecting component when the battery pack experiences thermal runaway.

[0010] In one possible implementation, the first connecting member includes a hydraulic seat and a piston rod, the hydraulic seat having a hydraulic chamber, the piston rod being slidably connected within the hydraulic chamber, and the hydraulic control component being connected to the hydraulic seat and used to drive the piston rod to move.

[0011] Part of the hydraulic seat is inserted into the second connecting member. The hydraulic seat is provided with at least one sliding groove. The limiting member is slidably connected to the sliding groove and abuts against the piston rod. The piston rod is provided with a relief groove. When the limiting member is located in the relief groove, the limiting member is separated from the second connecting member.

[0012] In one possible implementation, an elastic element is provided inside the hydraulic seat. The elastic element is located inside the hydraulic cavity. One end of the elastic element is connected to the piston rod, and the other end is connected to the bottom wall of the hydraulic cavity. The elastic element is used to drive the piston rod to slide away from the limiting member, so that the limiting member is away from the clearance groove.

[0013] In one possible implementation, the first connector further includes a mounting base, which is fixedly sleeved on the hydraulic base and is used to connect to the vehicle body.

[0014] In one possible implementation, the first connector further includes a plurality of diagonal braces, one end of which is connected to the mounting base and the other end of which is used to connect to the vehicle body.

[0015] In one possible implementation, the second connector includes a connecting portion and a snap-fit ​​portion. The connecting portion is provided with a connecting groove, and the snap-fit ​​portion is located in the connecting groove and connected to the connecting portion. A portion of the first connector is inserted into the connecting groove, and the limiting member engages with the snap-fit ​​portion.

[0016] Secondly, this application provides an automobile, including a body, a control system, and a battery pack connection structure disposed at the bottom of the body. The control system is communicatively connected to a hydraulic control component in the battery pack connection structure. When the battery pack experiences thermal runaway, the control system adjusts the battery pack to separate from the body.

[0017] In one possible implementation, the control system includes a first detection module and a control module. The first detection module is used to detect the temperature of the battery pack and the strain of the battery cells. The first detection module is communicatively connected to the control module, and the control module is communicatively connected to the hydraulic control component. When the temperature of the battery pack is greater than a preset temperature and the strain value of the battery cells is greater than a preset strain value, the control module controls the battery pack to separate from the vehicle body through the hydraulic control component.

[0018] In one possible implementation, the control system further includes a second detection module for detecting obstacles around the vehicle body. The second detection module is communicatively connected to the control module. When the second detection module detects that there are no obstacles around the vehicle body, the control module controls the battery pack to separate from the vehicle body via the hydraulic control component and discard the battery pack into an open area.

[0019] In one possible implementation, the control system further includes an energy storage module electrically connected to the control module, the energy storage module supplying power to the control module, and the control module controlling the vehicle body to continue driving to a safe area after the battery pack is separated.

[0020] This application provides a battery pack connection structure and a vehicle. The battery pack connection structure includes a battery pack and multiple connection components. The battery pack has a mounting beam. Each connection component includes a first connector, a second connector, a hydraulic control component, and at least one limiting component. The first connector connects to the vehicle body, and the second connector connects to the mounting beam. A portion of the first connector is inserted into the second connector. The limiting component is slidably connected to the first connector and configured to partially move out of the first connector and engage with the second connector. The hydraulic control component is connected to the first connector and is used to adjust the limiting component to separate from the second connector in the event of thermal runaway of the battery pack. When thermal runaway occurs, the hydraulic control component adjusts the position of the limiting component to separate it from the second connector. Under the influence of gravity, the battery pack causes the second connector to separate from the first connector, thereby actively separating the battery pack from the vehicle body. This reduces the risk to occupants during battery pack thermal runaway and improves the safety of people in the vehicle. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a schematic diagram of the battery pack connection structure provided in the embodiments of this application;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure where the connecting component is in a locked state;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure in which the connecting component is in the unlocked state;

[0025] Figure 4 This is a schematic diagram of the structure of a vehicle control system provided in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Battery pack; 110. Mounting beam;

[0028] 200. Connecting assembly; 210. First connecting member; 211. Hydraulic base; 2111. First connecting port; 2112. Second connecting port; 212. Piston rod; 2121. Piston part; 2122. Rod body part; 213. Hydraulic chamber; 214. Slide groove; 215. Clearance groove; 216. Elastic element; 217. Mounting base; 218. Diagonal brace; 220. Second connecting member; 221. Connecting part; 222. Snap-fit ​​part; 223. Connecting groove; 230. Hydraulic control element; 240. Limiting element;

[0029] 310. First detection module; 311. Temperature sensor; 312. Cell strain sensor; 313. Frame displacement sensor; 314. Smoke sensor; 320. Control module; 330. Second detection module; 331. Camera; 332. Detection radar; 340. Battery storage module; 350. Intelligent driving system; 360. Human-machine interface; 370. Controller area network; 380. Electronic stability control system; 390. Gigabit multimedia serial link; 400. Self-test module.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0032] In electric vehicles, the battery pack is typically installed at the bottom of the car. This makes full use of the chassis space and avoids encroaching on the interior passenger and trunk space. To reduce the weight of the electric vehicle and facilitate installation, the battery pack is usually laid directly on the bottom of the vehicle body, with the battery pack's base plate serving as the chassis. The battery pack is usually connected to the car body using bolts, securing it to the bottom of the vehicle body with multiple bolts. Therefore, removing the battery pack from an electric vehicle simply requires removing the bolts to detach the battery pack from the body.

[0033] However, when the battery pack is in a thermal runaway state such as overcharging, over-discharging, short circuit, or high temperature, the internal temperature of the battery pack rises sharply, which can easily lead to the battery pack catching fire or even exploding, seriously endangering the safety of people in the car.

[0034] This application provides a battery pack connection structure and an automobile. The battery pack connection structure includes a battery pack and multiple connection components. The battery pack has a mounting beam. Each connection component includes a first connector, a second connector, a hydraulic control component, and at least one limiting component. The first connector connects to the vehicle body, and the second connector connects to the mounting beam. A portion of the first connector is inserted into the second connector. The limiting component is slidably connected to the first connector and configured to partially move out of the first connector and engage with the second connector. The hydraulic control component is connected to the first connector and is used to adjust the limiting component to separate from the second connector in the event of thermal runaway of the battery pack. When thermal runaway occurs, the hydraulic control component adjusts the position of the limiting component to separate it from the second connector. Under the influence of gravity, the battery pack pulls the second connector away from the first connector, thereby actively separating the battery pack from the vehicle body. This reduces the risk to occupants during battery pack thermal runaway and improves the safety of people in the vehicle.

[0035] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0036] This application provides a battery pack connection structure, referring to... Figure 1 The battery pack connection structure includes a battery pack 100 and multiple connection components 200.

[0037] The battery pack 100 is provided with a mounting beam 110. The mounting beam 110 is used for detachable connection to the bottom of the vehicle body, so that the battery pack 100 serves as part of the chassis of the vehicle body. The bottom of the battery pack 100 serves as part of the chassis of the vehicle body, so that the battery pack 100 can be separated from the bottom of the vehicle body, providing conditions for the active detachment of the battery pack 100.

[0038] For example, two mounting beams 110 are provided, and the two mounting beams 110 are arranged on both sides of the battery pack 100 along the length direction of the battery pack 100. In this application, the length direction of the battery pack 100 is the length direction of the vehicle body. In other embodiments, the mounting beams 110 may also be arranged around the battery pack 100.

[0039] Reference Figure 1 and Figure 2The connecting assembly 200 includes a first connector 210, a second connector 220, a hydraulic control unit 230, and at least one limiting member 240. The first connector 210 is used to connect to the vehicle body, and the second connector 220 is used to connect to the mounting beam 110. A portion of the first connector 210 is inserted into the second connector 220. The limiting member 240 is slidably connected to the first connector 210 and is configured to partially retract from the first connector 210 and engage with the second connector 220. The hydraulic control unit 230 is connected to the first connector 210 and is used to adjust the limiting member 240 to separate from the second connector 220 in the event of thermal runaway of the battery pack 100.

[0040] When the battery pack 100 experiences thermal runaway, the position of the limiting member 240 is adjusted by the hydraulic control component 230 to separate the limiting member 240 from the second connecting member 220. Under the action of gravity, the battery pack 100 drives the second connecting member 220 to separate from the first connecting member 210, thereby actively separating the battery pack 100 from the vehicle body. This reduces the risk to personnel safety during thermal runaway of the battery pack 100 and improves the safety of people in the vehicle.

[0041] In one possible implementation, the first connector 210 includes a hydraulic base 211 and a piston rod 212. The hydraulic base 211 is provided with a hydraulic chamber 213. The piston rod 212 is slidably connected in the hydraulic chamber 213. The hydraulic control component 230 is connected to the hydraulic base 211 and is used to drive the piston rod 212 to move.

[0042] Part of the hydraulic seat 211 is inserted into the second connector 220. The hydraulic seat 211 is provided with at least one slide groove 214. The limiting member 240 is slidably connected to the slide groove 214 and abuts against the piston rod 212. The piston rod 212 is provided with a relief groove 215. When the limiting member 240 is located in the relief groove 215, the limiting member 240 is separated from the second connector 220.

[0043] Specifically, the hydraulic base 211 has a first connecting port 2111 and a second connecting port 2112, which are respectively connected to the hydraulic chamber 213 to allow brake fluid to enter and exit the hydraulic chamber 213.

[0044] For example, the piston rod 212 includes a piston portion 2121 and a rod portion 2122, which are coaxially arranged. The piston portion 2121 is fixed to one end of the rod portion 2122. The piston portion 2121 abuts against the side wall of the hydraulic chamber 213 to form a piston. A first connecting port 2111 and a second connecting port 2112 are located on both sides of the piston portion 2121, and the diameter of the rod portion 2122 is smaller than the diameter of the piston portion 2121. The first connecting port 2111 is located at the end away from the second connector 220, and the second connecting port 2112 is located on the side wall near the second connector 220. When pressure is applied into the hydraulic chamber 213 through the first connecting port 2111, the brake fluid pushes the piston portion 2121 to move towards the second connector 220. When pressure is applied into the hydraulic chamber 213 through the second connecting port 2112, the brake fluid pushes the piston portion 2121 to move away from the second connector 220.

[0045] For example, in order to prevent the piston part 2121 from getting stuck on the top of the hydraulic chamber 213, a limit ball is also provided on the top of the piston part 2121. The limit ball prevents the piston part 2121 from being completely attached to the top of the hydraulic chamber 213, and provides storage space for brake fluid.

[0046] For example, the bottom of the hydraulic base 211 is provided with an adjustment groove, which communicates with the bottom of the hydraulic chamber 213 and extends through the bottom of the hydraulic base 211. The rod portion 2122 is slidably inserted into the adjustment groove and abuts against the side wall of the adjustment groove. During the movement of the rod portion 2122, the rod portion 2122 always remains in contact with the side wall of the adjustment groove to prevent the possibility of brake fluid leakage from the adjustment groove. A sliding groove 214 is provided on the side wall of the hydraulic base 211 and communicates with the adjustment groove.

[0047] For example, the limiting member 240 can be a steel ball, which is slidably connected within the groove 214 and can partially move out of the groove 214 to engage with the second connecting member 220. The diameter of the steel ball is larger than the wall thickness of the hydraulic seat 211. When the rod body 2122 abuts against the steel ball, it pushes the steel ball partially out of the groove 214, forming a flange on the outer wall of the hydraulic seat 211 to facilitate engagement with the second connecting member 220.

[0048] For example, the number of limiting members 240 can be set to 2, 3, 4, etc., and the multiple limiting members 240 are evenly distributed on the peripheral wall of the hydraulic seat 211, and the multiple limiting members 240 are evenly distributed along the circumference of the hydraulic seat 211.

[0049] For example, the materials of the first connector 210, the second connector 220, and the limiting member 240 have high heat resistance and high strength to ensure normal operation under high temperature and high stress conditions. These materials can be stainless steel, titanium alloy, etc.

[0050] For example, the clearance groove 215 is an annular groove. When the steel ball is located in the clearance groove 215, the steel ball is completely located in the hydraulic seat 211, so that the steel ball is separated from the second connector 220. The hydraulic seat 211 can then be pulled out from the second connector 220, thereby realizing the rapid detachment of the battery pack 100 from the vehicle body with a fast response speed.

[0051] When the battery pack 100 is connected to the vehicle body, the hydraulic seat 211 is fixed to the vehicle body, and the second connector 220 is fixed to the mounting beam 110 of the battery pack 100. The bottom of the hydraulic seat 211 is inserted into the second connector 220, and the steel ball abuts against the rod body 2122, so that the steel ball part is located outside the hydraulic seat 211 and is engaged with the second connector 220. This achieves the fixation between the battery pack 100 and the vehicle body. When the battery pack 100 experiences thermal runaway, the brake fluid is controlled by the hydraulic control component 230 to flow into the first connecting port 2111, which pushes the piston rod 212 downward, thereby causing the clearance groove 215 to move to communicate with the slide groove 214. Under the action of the weight of the battery pack 100, the steel ball is squeezed by the second connector 220, causing the steel ball to retract into the hydraulic seat 211. The second connector 220 is removed from the hydraulic seat 211, thereby achieving the separation of the battery pack 100 from the vehicle body.

[0052] For example, refer to Figure 2 and Figure 3 The connecting assembly 200 has a locked state and an unlocked state. When the connecting assembly 200 is in the locked state, the steel ball abuts against the side wall of the rod portion 2122, and the steel ball portion is located outside the hydraulic seat 211 and engaged with the second connector 220. At this time, the battery pack 100 is fixedly connected to the vehicle body. When the connecting assembly 200 is in the unlocked state, the steel ball is located within the clearance groove 215, and the steel ball is completely located within the hydraulic seat 211. The steel ball is separated from the second connector 220, thereby separating the battery pack 100 from the vehicle body.

[0053] In one possible implementation, an elastic element 216 is provided inside the hydraulic base 211. The elastic element 216 is located inside the hydraulic chamber 213. One end of the elastic element 216 is connected to the piston rod 212, and the other end is connected to the bottom wall of the hydraulic chamber 213. The elastic element 216 is used to drive the piston rod 212 to slide away from the limiting member 240, so that the limiting member 240 is away from the clearance groove 215.

[0054] For example, the elastic element 216 can be a spring, which is sleeved on the rod part 2122. One end of the spring abuts against the piston part 2121, and the other end abuts against the bottom wall of the hydraulic chamber 213. The spring provides support elasticity for the piston part 2121, preventing the piston part 2121 from sliding downward under vibration or other conditions, and preventing the battery pack 100 from separating from the vehicle body due to vibration or other reasons during normal use.

[0055] In one possible implementation, the first connector 210 further includes a mounting base 217, which is fixedly sleeved on the hydraulic base 211 and is used to connect to the vehicle body.

[0056] Mounting seat 217 is fixedly sleeved on the outside of hydraulic seat 211. Mounting seat 217 is used to fix and connect with the vehicle body, thereby improving the stability of the connection.

[0057] In one possible implementation, the first connector 210 further includes a plurality of diagonal braces 218, one end of which is connected to the mounting base 217 and the other end of which is used to connect to the vehicle body.

[0058] Mounting bracket 217 passes through mounting holes on the vehicle body and is fixedly connected to the vehicle body. One end of the diagonal brace 218 is fixedly connected to mounting bracket 217, and the other end is connected to the vehicle body, thereby improving the stability of the connection between mounting bracket 217 and vehicle body.

[0059] In one possible implementation, the second connector 220 includes a connecting portion 221 and a snap-fit ​​portion 222. The connecting portion 221 is provided with a connecting groove 223. The snap-fit ​​portion 222 is located in the connecting groove 223 and connected to the connecting portion 221. A portion of the first connector 210 is inserted into the connecting groove 223. The limiting member 240 engages with the snap-fit ​​portion 222.

[0060] For example, the connecting part 221 can be a steel plate, and a connecting groove 223 is provided on the connecting part 221. The snap-fit ​​part 222 is located on the inner side wall of the connecting groove 223, and the snap-fit ​​part 222 is integrally formed with the connecting part 221. The snap-fit ​​part 222 forms an inward flange in the connecting groove 223. The bottom of the hydraulic seat 211 is inserted into the connecting groove 223, so that the steel ball is located below the snap-fit ​​part 222. By adjusting the position of the piston rod 212, the rod part 2122 pushes the steel ball part out of the hydraulic seat 211 and snaps it with the snap-fit ​​part 222, thereby fixing the battery pack 100 to the vehicle body.

[0061] For example, the hydraulic control unit 230 includes a one-box brake-by-wire system, a control valve, and a controller. The one-box brake-by-wire system is a hydraulic braking system in an electric vehicle, simplifying the overall vehicle control system by reusing components and hydraulic systems from the vehicle's one-box brake-by-wire system. The one-box brake-by-wire system is connected to the control valve, which is connected to the first connection port 2111 and the second connection port 2112 of the hydraulic seat 211. The controller is electrically connected to the one-box brake-by-wire system to control the opening and closing of the control valve. The controller is also electrically connected to the battery energy control module 320 of the battery pack 100. When the battery pack 100 experiences thermal runaway, the battery energy control module 320 transmits a thermal runaway signal to the controller. The controller then controls the brake valve to activate via the one-box brake-by-wire system, driving the piston rod 212 to move, thereby separating the second connector 220 from the first connector 210 on the battery pack 100, thus separating the battery pack 100 from the vehicle body.

[0062] For example, a brake-by-wire system (one-box), control valve, and controller can be integrated into a compact unit. This improves system responsiveness and reliability while reducing installation space and maintenance costs.

[0063] This application provides an embodiment of a car, referring to... Figure 4 It includes a vehicle body, a control system, and a battery pack connection structure located at the bottom of the vehicle body. The control system is communicatively connected to the hydraulic control component 230 in the battery pack connection structure. When the battery pack 100 experiences thermal runaway, the control system adjusts the battery pack 100 to separate from the vehicle body.

[0064] When the battery pack 100 shows signs of thermal runaway, the vehicle's control system immediately sends a command to the hydraulic control component 230 of the battery pack connection structure to quickly release the mechanical lock between the battery pack 100 and the vehicle body. This allows the battery pack 100 to actively detach from the vehicle body and move away from the passenger compartment in a controllable state, thereby isolating high temperatures, open flames, and toxic gases from the passenger space, reducing the risk of explosion or fire spread, and ensuring the safety of the people inside the vehicle.

[0065] In one possible implementation, the control system includes a first detection module 310 and a control module 320. The first detection module 310 is used to detect the temperature of the battery pack 100 and the strain of the battery cells. The first detection module 310 is communicatively connected to the control module 320, and the control module 320 is communicatively connected to the hydraulic control component 230. When the temperature of the battery pack 100 is greater than a preset temperature and the strain value of the battery cells of the battery pack 100 is greater than a preset strain value, the control module 320 controls the battery pack 100 to separate from the vehicle body through the hydraulic control component 230.

[0066] The first detection module 310 includes a temperature sensor 311 and a cell strain sensor 312. For example, the temperature sensor 311 can be a distributed temperature sensor array, and the cell strain sensor 312 can be a fiber optic strain sensor array, thereby acquiring the cell surface temperature, the internal temperature gradient of the module, and the micro-strain value of the cell shell in real time through the temperature sensor 311 and the cell strain sensor 312.

[0067] For example, the control module 320 can employ dual-threshold redundancy judgment. When at least three temperature sensors 311 in the distributed temperature sensor array 311 remain above the preset temperature for 2 seconds, and the casing strain ε of the corresponding battery cell in the battery pack 100 exceeds the preset strain, thermal runaway is determined to have occurred. The control module 320 then sends an action signal to the hydraulic control component 230, which controls the battery pack 100 to separate from the vehicle body.

[0068] For example, the preset temperature can be 120°C and the preset strain can be 1500µε.

[0069] For example, the control module 320 can be an on-board computer (Electronic Control Unit, ECU).

[0070] For example, the first detection module 310 may further include a frame displacement sensor 313. The frame displacement sensor 313 is disposed on the frame of the battery pack 100 to detect the displacement deformation of the frame of the battery pack 100. The frame displacement sensor 313 is communicatively connected to the control module 320. When the frame displacement of the battery pack 100 detected by the frame displacement sensor 313 is greater than a preset displacement, the control module 320 sends an action signal to the hydraulic control component 230, and the hydraulic control component 230 controls the battery pack 100 to separate from the vehicle body.

[0071] To improve the accuracy of thermal runaway detection and reduce the possibility of misjudgment, the control module 320 controls the battery pack 100 to separate from the vehicle body only when the temperature of the battery pack 100 is greater than the preset temperature, the strain value of the battery cell of the battery pack 100 is greater than the preset strain value, and the displacement deformation of the frame of the battery pack 100 is greater than the preset displacement.

[0072] For example, the frame displacement sensor 313 can be a miniature wire-type or magnetostrictive displacement gauge, installed at the four corners or the midpoint of the long side of the frame of the battery pack 100, to measure the micron-level displacement of the frame in real time under the action of thermal expansion, increased internal pressure, or individual cell bulging. For example, the preset displacement of the frame of the battery pack 100 is 0.5 mm.

[0073] For example, the first detection module 310 may further include a smoke sensor 314. The smoke sensor 314 is disposed within the battery pack 100 for detecting smoke in the battery pack 100. The smoke sensor 314 may be a photoelectric smoke sensor. The smoke sensor 314 is communicatively connected to the control module 320. When the smoke sensor 314 detects that the smoke concentration within the battery pack 100 is greater than a preset smoke concentration, the control module 320 controls the battery pack 100 to separate from the vehicle body via the hydraulic control component 230.

[0074] To improve the accuracy of thermal runaway detection and reduce the possibility of misjudgment, the control module 320 will only control the battery pack 100 to separate from the vehicle body via the hydraulic control component 230 when the temperature of the battery pack 100 is greater than the preset temperature, the strain value of the battery cell of the battery pack 100 is greater than the preset strain value, the displacement deformation of the frame of the battery pack 100 is greater than the preset displacement, and the smoke concentration inside the battery pack 100 is greater than the preset smoke concentration.

[0075] The first detection module 310 can also be a battery management system (BMS). The battery management system has detection modules such as a temperature sensor 311, a cell strain sensor 312, a frame displacement sensor 313, and a smoke sensor 314. Through communication connection between the battery management system and the control module 320, the status of the battery pack 100 can be monitored in real time. Only when multiple detection signals exceed preset values ​​will the battery management system determine that the battery pack 100 is in a thermal runaway state. The battery management system sends a thermal runaway signal to the control module 320, so that the control module 320 sends an action signal to the hydraulic control component 230, and the hydraulic control component 230 controls the separation of the battery pack 100 from the vehicle body.

[0076] In one possible implementation, the control system further includes a second detection module 330, which is used to detect obstacles around the vehicle body. The second detection module 330 is communicatively connected to the control module 320. When the second detection module 330 detects that there are no obstacles around the vehicle body, the control module 320 controls the battery pack 100 to separate from the vehicle body through the hydraulic control component 230 and discards the battery pack 100 to an open space.

[0077] For example, the second detection module 330 may include a camera 331 and a detection radar 332. The control system also includes an intelligent driving system 350, a human-machine interface 360 ​​(HMI), a controller area network 370 (CAN), an electronic stability control system 380 (ESC), and a gigabit multimedia serial link 390 (GMSL).

[0078] The camera 331 is connected to a gigabit multimedia serial link 390, which in turn is connected to the intelligent driving system 350 and the control module 320 for video and signal transmission. The detection radar 332 and the intelligent driving system 350 are connected to the control module 320 via a controller area network 370. The electronic stability control system 380 is also connected to the control module 320 via the controller area network 370.

[0079] For example, after the control module 320 determines that the battery pack 100 has thermal runaway, it uses the camera 331 and the detection radar 332 to capture and detect the vehicle's surrounding environment. The control module 320 analyzes obstacles around the vehicle and formulates an evacuation strategy based on this information. When the control module 320 determines that the area around the vehicle is open, its evacuation strategy is to immediately detach the battery pack 100. The control module 320 uses the hydraulic control component 230 to separate the battery pack 100 from the vehicle body, and the vehicle body continues to move away from the detached battery pack 100 due to inertia. When the control module 320 determines that there are obstacles around the vehicle, its evacuation strategy is for the vehicle to continue driving to an open area, and then the control module 320 uses the hydraulic control component 230 to separate the battery pack 100 from the vehicle body. The vehicle body continues to move away from the detached battery pack 100 due to inertia.

[0080] In the embodiments of this application, obstacles can be people and objects. For example, the control module 320 transmits information through the camera 331 and the detection radar 332, and the area around the vehicle is considered open when there are no obstacles within 3 meters around the vehicle.

[0081] For example, the control module 320 can also send the evacuation strategy to the intelligent driving system 350 via the controller local area network 370 to assist in the analysis and improvement of the evacuation strategy.

[0082] For example, when the control module 320 receives a thermal runaway signal, it can also send an alarm signal to the human-machine interface 360 ​​via the controller area network 370 to remind the driver and provide the driver with the option to actively detach the battery pack 100. An emergency one-button operation button pops up on the human-machine interface 360. The driver confirms the evacuation strategy by operating the emergency one-button operation button on the human-machine interface 360 ​​and sends it to the control module 320 via the controller area network 370. The control module 320 controls the separation of the battery pack 100 from the vehicle body via the hydraulic control component 230.

[0083] For example, when the control module 320 sends an alarm signal to the human-machine interface 360 ​​via the controller local area network 370, an SOS call button can also be displayed on the human-machine interface 360. The SOS call button sends alarm information to the outside world through the intelligent driving system 350.

[0084] For example, when the 360 ​​human-computer interaction interface displays an alarm signal, the alarm signal can wake up and warn the driver through pop-up windows, voice, screen flashing and other modes.

[0085] For example, when the control module 320 receives a thermal runaway signal, the electronic stability control system 380 transmits the accelerator or brake pedal signal to the control module 320 through the controller area network 370, and simultaneously provides vehicle speed information, so that the control module 320 can formulate an evacuation strategy based on the current driving speed and driving conditions.

[0086] For example, when the vehicle speed exceeds 100 km / h, the control module 320 instructs the electronic stability control system 380 to smoothly decelerate, allowing the vehicle to slow down to a safe range before proceeding with the subsequent battery pack 100 disconnection operation. When the vehicle speed is between 50-100 km / h and the vehicle is cornering, the electronic stability control system 380 will apply intermittent braking to the outer wheels and alert the operator via steering wheel vibration, ensuring the vehicle completes the corner before proceeding with the battery pack 100 disconnection operation to prevent skidding. When the vehicle speed is below 50 km / h, the control module 320 instructs a slight deceleration and immediately unlocks the battery pack 100, disconnecting it. When the vehicle is almost stationary, disconnection is temporarily prohibited, and the control module 320 alerts the driver via the human-machine interface 360.

[0087] In one possible implementation, the control system further includes an energy storage module 340, which is electrically connected to the control module 320. The energy storage module 340 supplies power to the control module 320, and the control module 320 controls the vehicle body to continue driving to a safe area after the battery pack 100 is separated.

[0088] The energy storage module 340 is electrically connected to the battery pack 100, allowing the battery pack 100 to charge the energy storage module 340. The energy storage module 340 is a 12V battery. The energy storage module 340 supplies power to the control module 320 and the entire vehicle's infotainment system. Even after the battery pack 100 is separated from the vehicle body, the battery can still supply power to the control module 320 and the entire vehicle's infotainment system, keeping the vehicle under control and allowing it to be driven to a safe area.

[0089] For example, the control system may also include a self-test module 400, which is connected to the hydraulic control component 230 and the first connector 210 to detect the hydraulic pressure and position information of the hydraulic control component 230 and the first connector 210. The self-test module 400 is communicatively connected to the control module 320 so that the control module 320 can determine the connection or disconnection status of the battery pack 100.

[0090] The self-test module 400 monitors the oil pressure, solenoid valve status, hydraulic cylinder stroke, piston rod 212 position and arrival signal of the hydraulic control component 230 in real time, and periodically sends the above hydraulic pressure and position information to the control module 320. The control module 320 determines whether the battery pack 100 is currently in a locked or disengaged state based on the received self-test data, and issues a warning signal or prohibits the disengagement action when an abnormality is detected.

[0091] The vehicle provided in this application embodiment has a battery pack connection structure consisting of a battery pack 100 and multiple connection components 200. The battery pack 100 has a mounting beam 110. Each connection component 200 includes a first connector 210, a second connector 220, a hydraulic control component 230, and at least one limiting component 240. The first connector 210 is connected to the vehicle body, and the second connector 220 is connected to the mounting beam 110. A portion of the first connector 210 is inserted into the second connector 220. The limiting component 240 is slidably connected to the first connector 210 and is configured to partially move out of the first connector 210 and engage with the second connector 220. The hydraulic control component 230 is connected to the first connector 210 and is used to adjust the limiting component 240 to separate from the second connector 220 when thermal runaway occurs in the battery pack 100. When the battery pack 100 experiences thermal runaway, the position of the limiting member 240 is adjusted by the hydraulic control component 230 to separate the limiting member 240 from the second connecting member 220. Under the action of gravity, the battery pack 100 drives the second connecting member 220 to separate from the first connecting member 210, thereby actively separating the battery pack 100 from the vehicle body. This reduces the risk to personnel safety during thermal runaway of the battery pack 100 and improves the safety of people in the vehicle.

[0092] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A battery pack connection structure, characterized in that, include: A battery pack (100) having a mounting beam (110) provided thereon; Multiple connecting components (200) include a first connector (210), a second connector (220), a hydraulic control component (230), and at least one limiting component (240). The first connector (210) is used to connect to the vehicle body, the second connector (220) is connected to the mounting beam (110), a portion of the first connector (210) is inserted into the second connector (220), and the limiting component (240) is slidably connected to the first connector (210). The limiting component (240) is configured to be partially removable from the first connector (210) and engage with the second connector (220). The hydraulic control component (230) is connected to the first connector (210), and the hydraulic control component (230) is used to adjust the limiter (240) to separate from the second connector (220) when thermal runaway occurs in the battery pack (100).

2. The battery pack connection structure according to claim 1, characterized in that, The first connecting member (210) includes a hydraulic base (211) and a piston rod (212). The hydraulic base (211) is provided with a hydraulic chamber (213). The piston rod (212) is slidably connected in the hydraulic chamber (213). The hydraulic control component (230) is connected to the hydraulic base (211) and is used to drive the piston rod (212) to move. Part of the hydraulic seat (211) is inserted into the second connector (220). The hydraulic seat (211) is provided with at least one slide groove (214). The limiting member (240) is slidably connected to the slide groove (214) and abuts against the piston rod (212). The piston rod (212) is provided with a relief groove (215). When the limiting member (240) is located in the relief groove (215), the limiting member (240) is separated from the second connector (220).

3. The battery pack connection structure according to claim 2, characterized in that, An elastic element (216) is provided inside the hydraulic base (211). The elastic element (216) is located inside the hydraulic cavity (213). One end of the elastic element (216) is connected to the piston rod (212), and the other end is connected to the bottom wall of the hydraulic cavity (213). The elastic element (216) is used to drive the piston rod (212) to slide away from the limiting member (240) so that the limiting member (240) is away from the clearance groove (215).

4. The battery pack connection structure according to claim 2, characterized in that, The first connector (210) further includes a mounting base (217), which is fixedly sleeved on the hydraulic base (211) and is used to connect with the vehicle body.

5. The battery pack connection structure according to claim 4, characterized in that, The first connector (210) also includes a plurality of diagonal braces (218), one end of which is connected to the mounting base (217), and the other end of which is used to connect to the vehicle body.

6. The battery pack connection structure according to any one of claims 1-5, characterized in that, The second connector (220) includes a connecting part (221) and a snap-fit ​​part (222). The connecting part (221) is provided with a connecting groove (223). The snap-fit ​​part (222) is located in the connecting groove (223) and connected to the connecting part (221). Part of the first connector (210) is inserted into the connecting groove (223). The limiting member (240) is snap-fitted with the snap-fit ​​part (222).

7. A car, characterized in that, The system includes a vehicle body, a control system, and a battery pack connection structure as described in any one of claims 1-6 disposed at the bottom of the vehicle body. The control system is communicatively connected to a hydraulic control component (230) in the battery pack connection structure. When the battery pack (100) experiences thermal runaway, the control system adjusts the battery pack (100) to separate from the vehicle body.

8. The automobile according to claim 7, characterized in that, The control system includes a first detection module (310) and a control module (320). The first detection module (310) is used to detect the temperature and cell strain of the battery pack (100). The first detection module (310) is communicatively connected to the control module (320). The control module (320) is communicatively connected to the hydraulic control component (230). When the temperature of the battery pack (100) is greater than a preset temperature and the cell strain value of the battery pack (100) is greater than a preset strain value, the control module (320) controls the battery pack (100) to separate from the vehicle body through the hydraulic control component (230).

9. The automobile according to claim 8, characterized in that, The control system also includes a second detection module (330), which is used to detect obstacles around the vehicle body. The second detection module (330) is communicatively connected to the control module (320). When the second detection module (330) detects that there are no obstacles around the vehicle body, the control module (320) controls the battery pack (100) to separate from the vehicle body through the hydraulic control component (230) and discards the battery pack (100) to an open space.

10. The automobile according to claim 8, characterized in that, The control system also includes a power storage module (340), which is electrically connected to the control module (320). The power storage module (340) supplies power to the control module (320), and the control module (320) controls the vehicle body to continue driving to a safe area after the battery pack (100) is separated.

Images