New energy automobile battery emergency management system

Abstract

The invention relates to the technical field of automobile battery protection, and particularly provides a new energy automobile battery emergency management system which comprises at least two sets of battery assemblies, and a set of BMS system is arranged in each set of battery assembly; the battery assemblies are connected into the emergency separation mechanisms, the emergency separation mechanisms are connected with the automobile, and each set of battery assembly is provided with one set of emergency separation mechanism; the emergency controller obtains the state information of the battery assembly through the BMS, judges whether the battery assembly has a fire risk or is on fire or not, and controls the corresponding battery separation mechanism to start when the battery assembly has the fire risk or is on fire, and the emergency separation mechanism drives the corresponding battery assembly to be separated from the automobile; when the battery assembly has a fire risk or is on fire, the emergency separation mechanism is controlled to be separated from the automobile, the automobile is prevented from being ignited when the battery assembly is on fire, and the safety of a driver and passengers is effectively protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile battery protection, and particularly relates to a new energy automobile battery emergency management system. BACKGROUND

[0002] At present, with the development of battery technology, the endurance of electric vehicles is getting higher and higher, and the popularity of electric vehicles is also getting higher and higher.

[0003] In the use process of the electric vehicle, if the battery is damaged by collision or if the battery has faults such as lithium dendrite phenomenon or overheat fire risk, there is a lack of effective emergency handling mechanism, which may cause the vehicle body to be ignited, resulting in serious safety accidents and causing great threat to the vehicle and personnel. Therefore, the present application provides a new energy automobile battery emergency management system. SUMMARY

[0004] The present application aims to provide a new energy automobile battery emergency management system to solve the problem that the current new energy automobile ignites the vehicle body when the battery catches fire.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A new energy automobile battery emergency management system, the emergency management system comprises:

[0007] At least two sets of battery assemblies, each set of battery assembly is provided with a set of BMS system;

[0008] Emergency disengagement mechanism, the battery assembly is connected in the emergency disengagement mechanism, the emergency disengagement mechanism is connected with the automobile, each set of the battery assembly is configured with a group of the emergency disengagement mechanism;

[0009] Emergency controller, the emergency controller obtains the state information of the battery assembly through the BMS system, judges whether the battery assembly has fire risk or has caught fire, and controls the corresponding battery disengagement mechanism to start when the battery assembly has fire risk or catches fire, the emergency disengagement mechanism drives the corresponding battery assembly to separate from the automobile.

[0010] Further, the BMS system contains a variety of sensors, including but not limited to temperature sensor, voltage sensor, current sensor, pressure sensor and gas sensor, the emergency controller judges whether the emergency disengagement mechanism needs to be started through formula (1):

[0011] M=aF+bU+cI+dP+wG; formula (1)

[0012] Wherein, the M is a judgment threshold, a, b, c, d, w are all weight, the F is a temperature parameter, the U is a voltage parameter, the I is a current parameter, the P is a voltage parameter, the G is a gas sensor parameter.

[0013] Further, the emergency escape mechanism comprises:

[0014] The shell assembly is a hollow cavity structure, and the battery assembly is fixed in the shell assembly.

[0015] The physical connector is used for connecting the shell assembly and the new energy vehicle, and comprises an electromagnetic lock and a locking block.

[0016] The electric connector is connected with an electric interface of the vehicle to realize power supply and data transmission.

[0017] Further, the locking block is provided with a horizontally arranged lock hole, and the physical connector further comprises:

[0018] The inner shell and the outer cover are both T-shaped and form an internal hollow cavity structure.

[0019] The lock rod is slidably connected to the inner shell in the up-down direction of the battery assembly, and the end of the lock rod is fixedly connected with an adsorption plate.

[0020] The connecting rod is a bent rod structure, one end of the connecting rod is rotatably connected in the first waist-shaped hole, and the bent corner of the connecting rod is rotatably connected to the inner shell.

[0021] The lock tongue mechanism is provided with a lock tongue rod and a second waist-shaped hole, the lock tongue rod is arranged in the horizontal direction, and the lock tongue rod penetrates the side wall of the inner shell and the outer shell assembly.

[0022] Further, the inner shell is further provided with a spring seat, and the physical connector further comprises:

[0023] A reset spring, two ends of the reset spring abut against the locking lug and the spring seat respectively, the reset spring is compressed when the adsorption plate slides upward.

[0024] Further, the edge of the battery assembly is provided with a plurality of battery lugs, and the emergency release mechanism further comprises:

[0025] A battery buffer spring is located between the battery lug and the inner wall of the shell assembly, and the battery assembly is suspended in the shell assembly.

[0026] Further, the emergency release mechanism further comprises:

[0027] At least three wheel assemblies are fixedly connected to the bottom of the shell assembly.

[0028] Further, a wheel body is arranged in the wheel assembly, a hub motor is arranged on the wheel body, and the emergency release mechanism further comprises:

[0029] A control circuit board is electrically connected with the battery assembly and the wheel body, and is used for controlling the rotating speed of each wheel body;

[0030] A sensor assembly is arranged at the end of the shell assembly in the forward direction, and the control circuit board controls the wheel body to rotate based on the identification result of the sensor assembly.

[0031] Further, the emergency release mechanism further comprises:

[0032] A traction assembly is used for towing the shell assembly to move forward.

[0033] Further, the emergency management system further comprises:

[0034] A fire extinguisher is fixedly connected to the inside of the shell assembly, the fire extinguisher is electrically connected with an emergency controller, and the emergency controller starts the fire extinguisher to release fire extinguishing material when detecting that the battery assembly is on fire or the temperature exceeds a threshold value.

[0035] Compared with the prior art, the new energy automobile battery emergency management system has the following beneficial effects:

[0036] The new energy automobile battery emergency management system disclosed in the embodiment of the application can monitor the state of the battery assembly in real time through the emergency controller and the BMS system, and control the emergency release mechanism to be separated from the automobile when the battery assembly has a fire risk or has caught fire, so as to prevent the automobile from being ignited when the battery assembly catches fire, and effectively protect the safety of the driver and the passenger. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structure diagram of a new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application.

[0038] Figure 2 An explosion view of an emergency disengaging mechanism in the new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application.

[0039] Figure 3 A front view of the emergency disengaging mechanism in the new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application.

[0040] Figure 4 A sectional view of A-A in the new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application.

[0041] Figure 5 A sectional view of B-B in the new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application. Figure 4

[0042] Figure 6 A structure diagram of a physical connector in the new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application. Figure 4

[0043] An explosion view of the physical connector in the new energy automobile battery emergency management system disclosed by the embodiment 1 of the present application. Figure 7

[0044] A structure diagram of a wheel assembly in the new energy automobile battery emergency management system disclosed by the embodiment 2 of the present application. Figure 8

[0045] A structure diagram of a traction assembly in the new energy automobile battery emergency management system disclosed by the embodiment 2 of the present application. Figure 9 Reference signs:

[0046] Figure 10

[0047]

[0048] ​​​001. Emergency controller; 002. Emergency detachment mechanism; 100. Housing assembly; 110. Bottom shell; 111. Battery compartment; 112. Traction compartment; 113. Control compartment; 114. Wheel groove; 115. Connecting groove; 116. Fastening groove; 120. Top cover; 200. Physical connector; 210. Physical connection shell; 211. Inner shell; 212. Outer cover; 213. Spring seat; 214. Locking tongue hole; 215. Rotating shaft; 220. Locking rod; 221. Locking lug; 222. First oblong hole; 230. Connecting rod; 240. Locking tongue mechanism; 241. Locking tongue rod; 242. Locking tongue plate; 243. Sliding seat; 244. Second oblong hole; 250. Adsorption plate; 260. Electromagnetic lock; 270. Locking block; 2 71. Lock hole; 280. Return spring; 300. Battery assembly; 310. Battery lug; 320. Battery buffer spring; 400. Wheel assembly; 410. Wheel connecting plate; 411. Shock absorber lug; 420. Wheel body; 430. Shock absorber connecting plate; 440. Shock absorber assembly; 441. Damper; 442. Shock absorber spring; 443. Shock absorber seat; 500. Electrical connector; 510. Electrical connecting plate; 520. Connection interface; 530. Physical circuit breaker; 600. Control circuit board; 610. Sensor assembly; 700. Traction assembly; 710. Traction roller; 720. Traction rope; 730. Rotating seat; 740. Traction interface; 741. Vehicle-mounted connecting block; 742. Battery connecting plate; 800. Fire extinguisher. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figure 1 As shown, one embodiment of the present invention provides a new energy vehicle battery emergency management system, the emergency management system comprising:

[0052] At least two battery assemblies 300, each battery assembly 300 is equipped with a BMS (Battery Management System);

[0053] Emergency detachment mechanism 002, the battery assembly 300 is connected to the emergency detachment mechanism 002, the emergency detachment mechanism 002 is connected to the vehicle, and each battery assembly is equipped with one set of the emergency detachment mechanism 002;

[0054] An emergency controller 001 acquires state information of the battery assembly 300 through the BMS system, and judges whether the battery assembly 300 has a fire risk or has caught fire, and controls the corresponding battery to be separated from the vehicle when the battery assembly 300 has a fire risk or catches fire.

[0055] Specifically, in the embodiment, when the vehicle is running, the emergency controller 001 acquires state information of the battery assembly 300 through the BMS system of the battery assembly 300, such as current, voltage, pressure, temperature, etc. When the battery assembly 300 has problems such as lithium dendrite initiation or internal short circuit caused by collision, overheating, fire, etc., the current, voltage, pressure, temperature, etc. of the battery assembly 300 all change accordingly. The emergency controller 001 judges whether the battery assembly 300 has a fire risk or has caught fire through the changes of the current, voltage, pressure, temperature, etc. of the battery assembly 300. When the emergency controller 001 judges that the battery assembly 300 has a fire risk or has caught fire, the emergency controller 001 controls the emergency separation mechanism 002 to be separated from the vehicle, so that the corresponding battery assembly 300 is separated from the vehicle.

[0056] The new energy vehicle battery emergency management system disclosed in the embodiment can monitor the state of the battery assembly in real time through the emergency controller 001 and the BMS system, and control the emergency separation mechanism 002 to be separated from the vehicle when the battery assembly 300 has a fire risk or has caught fire, thereby preventing the battery assembly 300 from igniting the vehicle when it catches fire, and effectively protecting the safety of the driver and passengers.

[0057] In the embodiment, the battery assembly 300 and the BMS system are both prior art.

[0058] Preferably, in the embodiment, the BMS system includes various sensors, including but not limited to temperature sensors, voltage sensors, current sensors, pressure sensors, and gas sensors.

[0059] The temperature sensor is one or more of an automotive NTC thermistor, a thermocouple sensor, or an infrared temperature sensor. The temperature sensor is used to detect the temperature of the battery. The change in temperature is related to the failure of the battery assembly 300 as follows: when the temperature of a single battery rises sharply (e.g., more than 10℃ / min), it may be an internal short circuit (caused by lithium dendrite piercing the separator) or an intensified electrolyte decomposition; when the local temperature is abnormally high (more than 5℃ higher than the surrounding temperature), it indicates that the single battery has internal abnormalities such as lithium dendrite growth and active material shedding; when the temperature of the battery pack exceeds 60℃, it enters the risk range of thermal runaway, which may cause the electrolyte to burn.

[0060] The voltage sensor is used to detect cell consistency and internal short circuit. The pressure parameter is related to the failure of the battery assembly 300 as follows: when the single cell voltage drops suddenly (such as instantaneously from 3.7V to below 2.0V), it may be an internal micro-short circuit caused by lithium dendrite, or a serious short circuit caused by diaphragm breakdown; when the cell voltage consistency is poor (the single cell voltage difference in the same module is >50mV), there may be uneven lithium dendrite growth leading to capacity attenuation difference, which will aggravate local overcharge and overdischarge in the long term; when the voltage rises too slowly during charging / falls too quickly during discharging, there may be a problem of abnormal increase of internal impedance of the cell (caused by lithium dendrite deposition).

[0061] The current sensor is used to detect abnormal charging and discharging and short circuit current. The current parameter is related to the failure of the battery assembly 300 as follows: when there is a persistent leakage current (>50mA) without charging and discharging instructions, it may be an internal micro-short circuit caused by lithium dendrite, and the current gradually increases with the growth of dendrite; when the current suddenly increases (more than 1.5 times the rated current) during discharging, it may be a short circuit current after the lithium dendrite pierces the diaphragm, accompanied by a sudden drop in voltage.

[0062] The pressure sensor is used to detect early gas expansion in thermal runaway. The pressure parameter is related to the failure of the battery assembly 300 as follows: when the pressure in the battery assembly 300 rises in a short time (such as rising by >5hPa in 5 minutes), there is an internal short circuit caused by lithium dendrite leading to decomposition of electrolyte, releasing CO, H2 and other gases, which is an early signal of thermal runaway (earlier than significant temperature rise).

[0063] The gas sensor is used to detect electrolyte decomposition products. The gas parameter is related to the failure of the battery assembly 300 as follows: when the hydrogen concentration is >100ppm or the carbon monoxide concentration is >50ppm, it indicates that the electrolyte has decomposed due to high temperature (lithium dendrite short circuit heat release), indicating that thermal runaway is about to occur.

[0064] In this embodiment, the emergency controller 001 determines whether the battery assembly 300 needs to be detached through comprehensive calculation of the above parameters.

[0065] Preferably, in this embodiment, the emergency controller 001 determines whether to start the emergency detachment mechanism 002 through formula (1):

[0066] M=aF+bU+cI+dP+wG; formula (1)

[0067] Wherein, M is the judgment threshold, a, b, c, d, w are weight values, F is the temperature parameter, U is the voltage parameter, I is the current parameter, P is the voltage parameter, and G is the gas sensor parameter.

[0068] It should be noted that in the present embodiment, the emergency controller 001 can also determine whether the battery assembly 300 needs to be detached in other ways, such as the trend of the state parameters of the battery assembly 300 or by using a trained neural network model to determine the failure of the battery assembly 300.

[0069] As a preferred embodiment in the present embodiment, the emergency controller 001 divides the failure of the battery assembly 300 into multiple levels based on the value of M, and different levels perform different operations. In the present embodiment, the failure levels of the battery assembly 300 are divided into three levels, such as first warning, second warning, and third warning. The first warning (such as micro-short circuit, slight lithium dendrite) is a slight abnormality of voltage / current and normal temperature, at which time the emergency controller 001 triggers the balancing control, and the emergency controller 001 limits the charging and discharging of the failed battery cell through the BMS system. The second warning (such as obvious lithium dendrite, local overheating) is a sudden temperature rise <5℃ / min and a slight increase in pressure, and the emergency controller 001 cuts off the module circuit through the BMS system and starts the heat dissipation device of the battery assembly 300. The third warning (thermal runaway risk) is a temperature >80℃, detection of characteristic gas, and sudden pressure rise, and the emergency controller 001 immediately starts the emergency detachment mechanism 002 of the failed battery and triggers the emergency stop of the vehicle.

[0070] Through the above multi-dimensional sensor monitoring and parameter analysis, the emergency controller 001 can achieve early warning before lithium dendrite-induced short circuit or thermal runaway, and combined with the real-time regulation of the BMS system, the risk of fire is minimized.

[0071] It should be noted that the emergency controller 001 also coordinates the power supply of the battery assembly 300. When one of the battery assemblies 300 is detached, the emergency controller 001 controls another battery assembly 300 to supply power to the vehicle.

[0072] In the present embodiment, the emergency controller 001 also controls the energy distribution of the vehicle through the BMS system of the battery assembly 300. Taking two battery assemblies 300 as an example:

[0073] During vehicle starting and acceleration, when the vehicle starts and accelerates, a larger power is needed to overcome the inertia of the vehicle and achieve rapid acceleration. At this time, the two battery assemblies 300 will output power at the same time, because the starting and acceleration process requires high instantaneous power demand, and a single battery assembly 300 may not be able to meet this high power demand, and two battery assemblies 300 can quickly provide sufficient power to ensure that the vehicle can start smoothly and accelerate quickly.

[0074] In the vehicle constant speed driving stage, when the vehicle enters the constant speed driving state, the demand for power is relatively stable and low, at this time, the emergency controller 001 will intelligently select one of the battery assemblies 300 as the main power supply for power use according to the power of the two battery assemblies 300 and the energy consumption of the vehicle, and the other one as the auxiliary system such as air conditioning, vehicle lights, navigation, internal sound and other energy demand, so as to optimize the use efficiency and service life of the battery. For example, if the power of one of the battery assemblies 300 is relatively high, and its performance parameters are more suitable for the current power supply demand, the emergency controller 001 will control the battery assembly 300 as the main power supply, and the other battery assembly 300 can be appropriately charged, such as charging by recovering the energy in the vehicle braking process, or as a backup power supply to cope with sudden changes in power demand. This energy distribution method avoids unnecessary frequent charging and discharging of the two battery assemblies 300, reduces the wear of the battery, thereby prolonging the service life of the battery, and at the same time improves the energy utilization efficiency of the entire battery system. Method for realizing efficient and stable operation of battery system

[0075] In addition, the emergency controller 001 will also dynamically adjust the energy distribution strategy of the battery according to the driving conditions of the vehicle and the state of the battery assembly 300, such as reasonably arranging the power supply proportion of the two battery assemblies 300 under different driving speeds and road conditions, so as to realize efficient and stable operation of the entire battery system.

[0076] Since the two battery assemblies 300 are independent of each other, when one part fails, the other part can still maintain the basic operation of the vehicle. For example, if a battery cell of one of the battery assemblies 300 appears a short circuit or open circuit fault, the BMS system can quickly detect the fault and send a request to the emergency controller 001 to perform the demand and take appropriate measures, such as cutting off the circuit connection of the fault part to avoid further expansion of the fault, while adjusting the energy distribution strategy to have the normal battery assembly 300 undertake more power supply tasks to ensure that the vehicle can continue to drive and realize the "limp home" function. This redundant design greatly improves the reliability and fault tolerance of the battery system, ensuring the safety of vehicle operation.

[0077] In this embodiment, the emergency controller 001 is a prior art, and the emergency controller 001 is a vehicle-mounted MCU.

[0078] As a preferred embodiment in this embodiment, as shown in Figures 2 to 6 The emergency disengagement mechanism 002 includes:

[0079] The shell assembly 100 is a hollow cavity structure, and the battery assembly 300 is fixedly connected to the shell assembly 100;

[0080] A plurality of physical connectors 200 are used to connect the shell assembly 100 and the new energy vehicle, the physical connector 200 includes an electromagnetic lock 260 and a locking block 270, the electromagnetic lock 260 is fixedly connected to the new energy vehicle, the electromagnetic lock 260 is controlled by the controller of the vehicle to open or close, the locking block 270 is fixedly connected to the shell assembly 100, and the electromagnetic lock 260 adsorbs the locking block 270 after being powered on;

[0081] An electric connector 500 is connected with the electric interface of the vehicle to realize power supply and data transmission, and the electric connector 500 is electrically connected with the battery assembly 300.

[0082] In the embodiment, the battery assembly 300 is fixedly connected to the inside of the shell assembly 100, the electromagnetic lock 260 is fixedly connected to the vehicle, the electromagnetic lock 260 is fixedly connected to the shell assembly 100, when the shell assembly 100 is connected to the vehicle, the controller of the vehicle controls the electromagnetic lock 260 to be powered on to adsorb the locking block 270, so that the battery is fixed to the vehicle, and since the controller in the vehicle is connected to the sensor in the battery assembly 300 through the electric connector 500, the controller of the vehicle can monitor the state of the battery assembly 300 in real time, when it is monitored that the battery assembly 300 has a fire risk or has caught fire, the controller of the vehicle controls the electromagnetic lock 260 to be powered off, the electromagnetic lock 260 cannot adsorb the locking block 270, and the shell assembly 100 is separated from the electromagnetic lock 260 under the action of gravity, so that the battery assembly 300 is separated from the vehicle.

[0083] It should be noted that when installing the battery with the new energy vehicle battery emergency management system disclosed in the embodiment, at least two sets of batteries are installed, and when one set of battery falls off, another set of battery can still supply power.

[0084] Specifically, as shown in Figures 3 to 6 The shell assembly 100 includes a bottom shell 110 and an upper cover 120, the bottom shell 110 is a groove-shaped structure, the battery assembly 300 is fixedly connected to the inside of the bottom shell 110, the bottom shell 110 and the upper cover 120 are fixedly connected by bolts, and the bottom shell 110 and the upper cover 120 form a hollow cavity structure.

[0085] Preferably, the bottom shell 110 is internally partitioned by a partition structure into a battery compartment 111, the battery assembly 300 is fixedly connected to the inside of the battery compartment 111, the electrical connector 500 is fixedly connected to the inside of the bottom shell 110 by bolts, the interface on the electrical connector 500 penetrates through the upper cover 120, the electrical connector 500 is a prior art, and the edge of the battery assembly 300 is provided with a plurality of battery supporting lugs 310 which are fixedly connected to the bottom shell 110 by bolts.

[0086] As a preferred embodiment in the present embodiment, as shown in Figure 3 The emergency escape mechanism 002 further comprises:

[0087] A battery buffer spring 320 is arranged between the battery supporting lug 310 and the bottom shell 110, the bottom shell 110 is fixedly provided with a stud connecting the battery supporting lug 310, the battery buffer spring 320 is sleeved on the stud, the battery supporting lug 310 is fixed to the stud by a nut structure, and the battery buffer spring 320 suspends the battery assembly 300 in the outer shell assembly 100, thereby providing shock absorption, so that the battery buffer spring 320 can play a role of energy absorption and buffering when the outer shell assembly 100 falls to the ground.

[0088] The locking block 270 is fixedly connected to the inner side of the bottom shell 110 by bolts, the upper end of the locking block 270 penetrates through the upper cover 120 and is flush with the outer side of the upper cover 120, and the electromagnetic lock 260 can attract the locking block 270 after being powered on, so that the outer shell assembly 100 can be fixedly connected to the automobile, and in the present embodiment, the physical connector 200 is provided with four, and the four physical connectors 200 are distributed near the four corners of the outer shell assembly 100.

[0089] Preferably, as shown in Figure 7 and Figure 8 The physical connector 200 further comprises a physical connection shell 210, the physical connection shell 210 comprises an inner shell body 211 and an outer cover 212, the inner shell body 211 and the outer cover 212 are fixedly connected, the inner shell body 211 and the outer cover 212 form a hollow cavity, the electromagnetic lock 260 is fixedly connected to the inside of the inner shell body 211 by bolts, and the adsorption surface (i.e. the surface for adsorbing the locking block 270) of the electromagnetic lock 260 penetrates through the inner shell body 211 and is located on the outer side of the inner shell body 211.

[0090] Preferably, the inner shell 211 and the outer cover 212 are both T-shaped, the outer side of the bottom shell 110 is provided with a connecting groove 115 and a fastening groove 116, the fastening groove 116 is located on both sides of the connecting groove 115, the locking block 270 is fixedly connected to the inner side of the fastening groove 116 by bolts, the locking block 270 is a square iron block, the locking block 270 is provided with a through hole structure, the bolts pass through the through hole structure on the locking block 270 and are fixed to the bottom shell 110, when the electromagnetic lock 260 and the locking block 270 are connected, the inner shell 211 is inserted into the inner side of the connecting groove 115, the connecting groove 115 plays a role of limiting the inner shell 211, so that the inner shell 211 plays a role of reverse limiting of the outer shell assembly 100, thereby preventing the outer shell assembly 100 from shaking when the car is driving, the connecting groove 115 is an inner recess structure opened in the edge of the bottom shell 110, the fastening groove 116 is a groove structure provided on the inner side of the bottom shell 110, and the inner shell 211 and the outer cover 212 are fixedly connected by bolts.

[0091] As a preferred embodiment in the present embodiment, as shown in Figure 7 and Figure 8 The locking block 270 is provided with a horizontally arranged lock hole 271, and the physical connector 200 further comprises:

[0092] A lock rod 220 is slidingly connected to the inner shell 211 in the up-down direction of the battery assembly 300, the end of the lock rod 220 is fixedly connected with an adsorption plate 250, the electromagnetic lock 260 is energized to adsorb the adsorption plate 250 to drive the lock rod 220 to slide upward, one end of the lock rod 220 away from the adsorption plate 250 is provided with a locking lug 221, and the locking lug 221 is provided with a first waist-shaped hole 222.

[0093] A connecting rod 230 is a bent rod structure, one end of the connecting rod 230 is rotatably connected in the first waist-shaped hole 222, and the bent corner of the connecting rod 230 is rotatably connected to the inner shell 211.

[0094] A lock tongue mechanism 240 is provided with a lock tongue rod 241 and a second waist-shaped hole 244, the lock tongue rod 241 is arranged in the horizontal direction (for example, the posture when the car is driving), the lock tongue rod 241 penetrates the inner shell 211 and the bottom shell 110, the second waist-shaped hole 244 is arranged in the vertical direction, one end of the connecting rod 230 away from the first waist-shaped hole 222 is rotatably connected in the second waist-shaped hole 244, when the lock rod 220 slides upward, the lock rod 220 drives the lock tongue mechanism 240 to slide outward through the connecting rod 230, and the lock tongue rod 241 is inserted into the lock hole 271.

[0095] Specifically, in the embodiment, the inner shell 211 is provided with a lock tongue hole 214, the lock tongue rod 241 is located in the lock tongue hole 214, the inner shell 211 is further provided with a rotating shaft 215, the connecting rod 230 is a curved structure, the connecting rod 230 is provided with a through hole structure at the bending angle, the connecting rod 230 is rotatably connected to the rotating shaft 215 at the bending angle, the rotating shaft 215 is located obliquely below the lock rod 220, both ends of the connecting rod 230 are provided with pin shaft structures, the pin shaft structures at both ends of the connecting rod 230 are located in the first waist-shaped hole 222 and the second waist-shaped hole 244 respectively, since the first waist-shaped hole 222 and the second waist-shaped hole 244 are both long strip holes, the pin shaft structures at both ends of the connecting rod 230 can rotate and slide in the first waist-shaped hole 222 and the second waist-shaped hole 244, the end of the lock tongue rod 241 is provided with a lock tongue plate 242, the lock tongue rod 241 and the lock tongue plate 242 are vertically arranged, the lock tongue plate 242 is vertically provided with a sliding seat 243, the second waist-shaped hole 244 is located at the sliding seat 243, when the electromagnetic lock 260 attracts the locking block 270, the electromagnetic lock 260 synchronously attracts the adsorption plate 250, the adsorption plate 250 drives the lock rod 220 to slide upward, the locking lug 221 drives the connecting rod 230 to rotate, one end of the connecting rod 230 connected to the lock rod 220 rotates outward, so that the lock tongue mechanism 240 slides outward, the lock tongue rod 241 slides in the rotating shaft 215 and is inserted into the lock hole 271, thereby being fixed to the locking block 270, further limiting the outer shell assembly 100, and limiting the outer shell assembly 100 in the vertical direction through physical connection, thereby improving the fastening of the connection, when unlocking, the electromagnetic lock 260 is demagnetized, the lock rod 220 slides downward under the action of gravity, thereby driving the lock tongue mechanism 240 to slide inward.

[0096] Preferably, in order to reduce the unlocking time of the lock tongue mechanism 240, the inner shell 211 is further provided with a spring seat 213, the lock rod 220 is further sleeved with a return spring 280, both ends of the return spring 280 are abutted on the locking lug 221 and the spring seat 213 respectively, when the adsorption plate 250 slides upward, the return spring 280 is in a compressed state, after the electromagnetic lock 260 is demagnetized, the return spring 280 pushes the lock rod 220 to move downward under the action of restoring force, thereby quickly unlocking.

[0097] Preferably, the upper cover 120 is also fixed with a plurality of elastic members (not shown in the figure) near the end face of the automobile. The elastic members can be rubber blocks or spring structures. When the shell assembly 100 is connected to the automobile, the elastic members are compressed. The elastic members are fixed to the upper cover 120 by means of bolts or adhesion. When the electromagnetic lock 260 is unlocked, the elastic members can provide a downward force, so as to achieve the purpose of rapid disengagement of the battery.

[0098] Preferably, in the embodiment, the electric connector 500 is a prior art, which comprises an electric connection plate 510 and a connection interface 520. The electric connection plate 510 is fixedly connected to the bottom shell 110 by means of bolts. The connection interface 520 is located on the electric connection plate 510 and is electrically connected to the electrodes and sensors of the battery assembly 300.

[0099] Preferably, in the embodiment, the electric connection plate 510 is also provided with a main circuit relay, which is electrically connected to the emergency controller 001. When the emergency controller 001 issues a disengagement instruction, the emergency controller 001 synchronously controls the main circuit relay to cut off the power supply circuit of the battery assembly 300 and the electric connection plate 510.

[0100] Preferably, the main circuit relay is also connected in parallel with a discharge resistor. When the main circuit relay is disconnected, the discharge resistor can reduce the bus capacitor voltage to a safe value.

[0101] As a preferred embodiment in the embodiment, as shown in Figure 3 the point connector 500 also comprises a physical breaker 530. The physical breaker 530 is a press type, normally open switch. That is, when the physical breaker 530 is pressed, the physical breaker 530 is closed. When the physical breaker 530 is not pressed, the physical breaker 530 is disconnected. The pressing end of the physical breaker 530 is located on the upper cover 120. When the battery assembly 300 is installed on the automobile, the physical breaker 530 is in a closed state. When the battery assembly is disengaged, the physical breaker 530 is disconnected.

[0102] As a preferred embodiment in the embodiment, as shown in Figure 3 the emergency management system also comprises:

[0103] The fire extinguisher 800 is fixedly connected to the inside of the shell assembly 100. The fire extinguisher 800 is electrically connected to the emergency controller 001 through the electric connector 500. When the emergency controller 001 detects that the battery assembly 300 is on fire or the temperature exceeds a threshold value, the emergency controller 001 starts the fire extinguisher 800 to release fire extinguishing material.

[0104] In this embodiment, the fire extinguisher 800 is an aerosol fire extinguishing device, which releases aerosol for fire extinguishing inside the shell assembly 100.

[0105] Embodiment 2

[0106] As Figure 3 shown, as another embodiment of the present application, this embodiment is different from embodiment 1 in that the emergency escape mechanism 002 further comprises:

[0107] At least three wheel assemblies 400 are fixedly connected to the bottom of the shell assembly 100.

[0108] Specifically, in this embodiment, the wheel assembly 400 is provided with four, four of which are located at the four corners of the bottom shell 110. After the shell assembly 100 falls to the ground, the wheel assembly 400 lands first. In the vehicle driving state, the shell assembly 100 has inertia, and the wheel assembly 400 rolls under the action of the inertial force, thereby reducing the wear of the shell assembly 100.

[0109] Preferably, as Figure 9 shown, the wheel assembly 400 comprises a wheel connecting plate 410, a wheel body 420, a damping connecting plate 430, and a damping assembly 440. The damping lug 411 is provided on the wheel connecting plate 410. The two ends of the damping connecting plate 430 are rotatably connected to the rotating shaft of the wheel body 420 and the end of the damping lug 411 away from the wheel connecting plate 410. The two ends of the damping assembly 440 are fixedly connected to the wheel connecting plate 410 and the rotating shaft of the wheel body 420, respectively. The damping connecting plate 430 and the damping assembly 440 play a damping role. When the wheel assembly 400 falls to the ground, the distance between the wheel body 420 and the wheel connecting plate 410 changes. The damping connecting plate 430 rotates on the damping lug 411, and the damping assembly 440 contracts to absorb the vibration.

[0110] Preferably, the damping assembly 440 is a prior art, which comprises a damper 441, a damping spring 442 and a damping seat 443, the damping seat 443 is an L-shaped plate, the damping seat 443 is fixedly connected to the rotating shaft of the wheel body 420, the two ends of the damper 441 are fixedly connected to the wheel connecting plate 410 and the damping seat 443, the damping spring 442 is sleeved on the damper 441, and the two ends of the damping spring 442 abut on the damping seat 443 and the wheel connecting plate 410 respectively, when the damping assembly 440 is damped, the vibration is absorbed by the deformation of the damping spring 442 and the stretching and contraction of the damper 441, and it should be noted that when the wheel body 420 rotates through the damping connecting plate 430, the damping spring 442 will be slightly deformed, so that the damping connecting plate 430 can rotate around the damping lug 411, and the arrangement of the damping assembly 440 enables the shell assembly 100 to withstand greater impact.

[0111] As a preferred embodiment in the embodiment, the wheel body 420 is provided with a hub motor, that is, the wheel body 420 can rotate by itself after being powered on, and the hub motor in the wheel body 420 is powered through the current collection slip ring on the damping connecting plate 430, and the emergency release mechanism 002 further comprises:

[0112] A control circuit board 600, which is electrically connected with the battery assembly 300 and the wheel body 420, is used to control the rotating speed of each wheel body 420;

[0113] The control circuit board 600 is further electrically connected with a sensor assembly 610, which is located at the end of the front direction of the bottom shell 110, and is used to identify the environment, and the control circuit board 600 controls the wheel body 420 to rotate based on the identification result of the sensor assembly 610, so that the bottom shell 110 follows the vehicle to move forward.

[0114] Specifically, the control circuit board 600 is the control board of the AGV trolley, the control circuit board 600 is provided with an automatic driving program, the sensor assembly 610 is provided with a visual sensor and a laser radar, the visual sensor is used to identify vehicle information such as license plate and vehicle model, and the laser radar is used to identify the distance or relative position between the bottom shell 110 and the vehicle, and the automatic driving program on the sensor assembly 610 controls the wheel body 420 to rotate based on the identification result of the sensors on the sensor assembly 610, so that the shell assembly 100 can follow the vehicle and keep a predetermined distance.

[0115] In this embodiment, the wheel assembly 400 is provided with four groups, when the rotation speeds of the four wheels on the wheel body 420 are different, the shell assembly 100 can realize the steering function.

[0116] It should be noted that in actual production, the wheel assembly 400 can also have other layout modes, such as referring to the layout mode of the AGV trolley in the prior art, the wheel assembly 400 with a hub motor is arranged at the middle position of the two sides of the shell assembly 100, and the universal wheel is arranged at the middle position of the end of the shell assembly 100. When controlling the shell assembly 100 to advance and turn, the straight-line advancement or steering is realized by controlling the rotation speed of the wheel assembly 400 on both sides.

[0117] As a preferred embodiment in this embodiment, as shown in Figure 3 and Figure 10 The emergency disengagement mechanism 002 further comprises:

[0118] The traction assembly 700 is used to pull the shell assembly 100 after disengagement, and the traction assembly 700 comprises a traction roller 710, a traction rope 720, a rotating seat 730, and a traction interface 740. The traction roller 710 is rotatably connected to the shell assembly 100 through the rotating seat 730. The traction rope 720 is wound around the traction roller 710. The traction interface 740 comprises a vehicle-mounted connecting block 741 and a battery connecting plate 742. The vehicle-mounted connecting block 741 and the battery connecting plate 742 are fixedly connected by adsorption. One end of the traction rope 720 passes through the bottom shell 110 and is fixedly connected with the vehicle-mounted connecting block 741. The battery connecting plate 742 is fixedly connected to the shell assembly 100. When the shell assembly 100 is disengaged, the vehicle-mounted connecting block 741 is fixed to the automobile. The vehicle-mounted connecting block 741 pulls the traction rope 720, the traction roller 710 rotates, and the traction rope 720 extends out of the shell assembly 100 until the traction rope 720 is tensioned. The automobile pulls the shell assembly 100 through the traction rope 720. The traction rope 720 is used to prevent the shell assembly 100 from being too far away. In this embodiment, the length of the traction rope 720 is pre-set.

[0119] Specific, the rotating seat 730 inside hollow, the rotating seat 730 is fixedly connected to the bottom shell 110 by bolt, the traction rope 720 is rotatably connected to the rotating seat 730, and the rotating shaft of the traction rope 720 and the rotating seat 730 are also provided with a volute spring, when the traction rope 720 is stretched out, the volute spring is compressed, so that the traction roller 710 can automatically rotate under the action of the volute spring, thereby winding up the traction rope 720, the battery connecting plate 742 is a square block, a plurality of first magnets are arranged on the battery connecting plate 742, the vehicle-mounted connecting block 741 is fixedly connected to the vehicle by bolt, a plurality of second magnets are arranged on the vehicle-mounted connecting block 741, the first magnets and the second magnets are connected by adsorption, at the same time, a plurality of first magnets and a plurality of second magnets are one-to-one corresponding, also have the effect of positioning, so that the vehicle-mounted connecting block 741 is fixed to the preset position on the shell assembly 100.

[0120] Preferably, in the embodiment, the bottom shell 110 is also separated into a traction bin 112 and a control bin 113 by a partition structure, the traction bin 112 is located at the front end of the bottom shell 110, that is, at one end of the forward direction of the vehicle, the control bin 113 is located at the tail end of the bottom shell 110 away from the traction bin 112, the traction assembly 700 and the sensor assembly 610 are fixedly connected in the traction bin 112, and the control circuit board 600 is fixedly connected in the control bin 113.

[0121] The bottom shell 110 is also provided with a wheel groove 114 at the four corners, and the wheel assembly 400 is fixedly connected in the wheel groove 114 by bolt.

[0122] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a," "an," and "the" used in the present application and the appended claims are intended to include plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refer to and encompass any or all possible combinations of one or more of the associated listed items.

[0123] It should be understood that, although the terms first, second, third, etc. can be employed in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another type of information. For example, without departing from the scope of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon determination" or "in response to determining".

[0124] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A new energy vehicle battery emergency management system, characterized in that, The emergency management system includes: At least two battery packs, each with its own BMS system; An emergency detachment mechanism is provided, wherein the battery assembly is connected to the emergency detachment mechanism, and the emergency detachment mechanism is connected to the vehicle. Each battery assembly is equipped with one set of the emergency detachment mechanism. An emergency controller obtains the status information of the battery pack through the BMS system, determines whether the battery pack is at risk of catching fire or has already caught fire, and controls the corresponding battery disconnection mechanism to start when the battery pack is at risk of catching fire or has caught fire. The emergency disconnection mechanism drives the corresponding battery pack to detach from the vehicle.

2. The emergency management system for new energy vehicle batteries according to claim 1, characterized in that, The BMS system includes various sensors, including but not limited to temperature sensors, voltage sensors, current sensors, pressure sensors, and gas sensors. The emergency controller determines whether the emergency evacuation mechanism needs to be activated using formula (1): M=aF+bU+cI+dP+wG; formula (1) Wherein, M is the judgment threshold, a, b, c, d, and w are all weights, F is the temperature parameter, U is the voltage parameter, I is the current parameter, P is the voltage parameter, and G is the gas sensor parameter.

3. A new energy vehicle battery emergency management system according to claim 1 or 2, characterized in that, The emergency evacuation mechanism includes: A housing assembly, which is a hollow cavity structure, wherein a battery assembly is fixed inside the housing assembly; Multiple physical connectors are provided for connecting the housing assembly and the new energy vehicle. Each physical connector includes an electromagnetic lock and a locking block. The electromagnetic lock is fixedly connected to the new energy vehicle and is controlled to open or close by the vehicle's controller. The locking block is fixedly connected to the housing assembly and attracts the locking block when the electromagnetic lock is energized. An electrical connector that connects to an electrical interface on the vehicle to provide power to the vehicle and transmit data, and the electrical connector being electrically connected to the battery assembly.

4. The emergency management system for new energy vehicle batteries according to claim 3, characterized in that, The locking block is provided with a horizontally arranged locking hole, and the physical connector further includes: The inner shell and the outer cover are both T-shaped and together form a hollow cavity structure. A locking rod is slidably connected to the inner shell along the vertical direction of the battery assembly. An adsorption plate is fixedly connected to the end of the locking rod. When the electromagnetic lock is energized, it adsorbs the adsorption plate to drive the locking rod to slide upward. A locking lug is provided at the end of the locking rod away from the adsorption plate, and a first waist-shaped hole is provided on the locking lug. A connecting rod, wherein the connecting rod is a bent rod structure, one end of the connecting rod is rotatably connected to the first waist-shaped hole, and the bent part of the connecting rod is rotatably connected to the inner housing; The locking tongue mechanism is provided with a locking tongue rod and a second oblong hole. The locking tongue rod is arranged in a horizontal direction and passes through the inner housing and the side wall of the outer housing assembly. The second oblong hole is arranged in a vertical direction, and the end of the connecting rod away from the first oblong hole is rotatably connected in the second oblong hole.

5. The emergency management system for new energy vehicle batteries according to claim 4, characterized in that, The inner housing is further provided with a spring seat, and the physical connector also includes: A reset spring is provided, with its two ends abutting against the locking lug and the spring seat, respectively. When the suction plate slides upward, the reset spring is compressed.

6. The emergency management system for new energy vehicle batteries according to claim 3, characterized in that, The edge of the battery assembly is provided with multiple battery tabs, and the emergency detachment mechanism further includes: A battery buffer spring is located between the battery lug and the inner wall of the housing assembly, wherein the battery assembly is suspended within the housing assembly.

7. The emergency management system for new energy vehicle batteries according to claim 3, characterized in that, The emergency evacuation mechanism also includes: At least three wheel assemblies are fixedly connected to the bottom of the housing assembly.

8. The emergency management system for new energy vehicle batteries according to claim 7, characterized in that, The wheel assembly contains a wheel body, and the wheel body is equipped with a hub motor. The emergency disengagement mechanism further includes: A control circuit board, which is electrically connected to the battery assembly and the wheel body, is used to control the rotational speed of each wheel body respectively; A sensor assembly is located at the forward-directing end of the housing assembly, and the control circuit board controls the rotation of the wheel body based on the recognition result of the sensor assembly.

9. The emergency management system for new energy vehicle batteries according to claim 7, characterized in that, The emergency evacuation mechanism also includes: A traction assembly used by a vehicle to tow the said housing assembly forward.

10. A new energy vehicle battery emergency management system according to claim 3, characterized in that, The emergency management system also includes: A fire extinguisher is fixedly connected inside the housing assembly. The fire extinguisher is electrically connected to an emergency controller. When the emergency controller detects that the battery assembly is on fire or the temperature exceeds a threshold, it activates the fire extinguisher to release extinguishing material.

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