Quick-change battery fixed situation awareness system and method

Abstract

The invention provides a quick-change battery fixed situation sensing system and method. The quick-change battery fixed situation sensing system is composed of a power supply module, a monitoring signal source module, a safety monitoring module, a position signal detection module, a central processing unit module, a control module, a communication module and the like. Wherein the power supply module provides stable voltage support; the monitoring signal source generates an accurate detection signal; the safety monitoring module manages and controls vehicle mode switching (battery replacement / operation) in real time, and misoperation is prevented; the position signal detection module dynamically collects the mechanical fixing state and the electrical connection state of the battery; the central processing unit analyzes the data and then controls the state indicator lamp, the VCU and the locking motor to work; and the communication module realizes data interaction. According to the system, the fixing and connecting states of the battery are monitored in real time, a grading safety strategy (such as mode switching forbidding, power reduction operation and whole vehicle power-off) is triggered and early warning is synchronously carried out when abnormity is detected, the power interruption risk is effectively avoided, and the safety and reliability of vehicle operation and battery replacement operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, specifically to a quick-change battery fixed situation awareness system and method. BACKGROUND

[0002] With the rapid development of electric vehicles, battery quick-change technology as a solution to quickly supplement the power has gradually become the focus of the industry. However, the existing battery quick-change system has obvious deficiencies in real-time monitoring of the battery fixing and connection state. During frequent replacement of the battery pack, there may be situations of unreliable mechanical fixing or poor electrical connection, which may cause safety hazards during vehicle operation or battery replacement. The existing technology lacks a real-time monitoring mechanism for the battery fixing state, and cannot provide timely warnings when the battery is loose or poorly connected, which may cause power interruption or other safety accidents. Therefore, how to improve the safety and reliability of the battery quick-change system has become a technical problem to be solved. SUMMARY

[0003] The present application aims to overcome the above-mentioned deficiencies of the prior art and provide a quick-change battery fixed situation awareness system and method.

[0004] The technical solution adopted by the present application is as follows: A quick-change battery fixed situation awareness system, comprising a power module, a monitoring signal source, a safety monitoring module, a position signal detection module, a central processing unit, a control module and a communication module.

[0005] The power module provides stable working voltage for each functional module of the system, has under-voltage, over-voltage, overload and reverse protection functions, supports wide range of input voltage (DC 7-20V) and multiple voltage levels of output voltage, and ensures the normal operation of each module of the system.

[0006] The monitoring signal source uses a function signal generator to provide monitoring signals for the monitoring object and reference signals for the central processing unit; the monitoring signal source generates PWM signals for detecting the fixing state and connection state of the battery.

[0007] The safety monitoring module is used to set the working mode of the vehicle (battery replacement or operation) and monitor the conditions for mode conversion, and when the conversion conditions are not met, it is prohibited to switch between the battery replacement and operation modes to prevent safety accidents caused by misoperation; the safety monitoring module includes a mode switch and a safety monitoring unit, and the mode switch contains a state indicator light for indicating the fixing state of the power battery (safe state, warning state and fault state).

[0008] The position signal detection module includes a power battery position detection module and a quick-change connector position detection module, which are respectively used to collect power battery fixing state information and quick-change connector connection state information, and provide relevant state parameters for the central processor.

[0009] The central processor receives and analyzes data of the safety monitoring module and the position signal detection module based on a preset program, judges whether the fixing state and the connection state of the battery are normal, and sends corresponding control instructions to execute safety measures when an abnormality is detected.

[0010] The control module drives relevant elements to work according to the control instructions of the central processor, and includes a first control module and a second control module. The first control module is used to control a vehicle control unit (VCU) and a locking motor to prevent misoperation from causing high-voltage power-on or battery pack loosening. The second control module is used to control a state indicator lamp to display the fixing state of the power battery and the connection state of the quick-change connector in real time. The communication module includes a wireless communication unit and a CAN communication unit, which are used for data exchange and communication between the quick-change battery fixing state awareness system and the vehicle control unit (VCU) and the battery charging and replacing station.

[0011] Optionally, the safety monitoring module includes a mode switch (containing a state indicator lamp) and a safety monitoring unit. The safety monitoring unit receives signals of the mode switch, collects vehicle state information (speed, gear, parking, etc.), and transmits processing results to the central processor. The second control module controls the working state of the state indicator lamp according to the instructions of the central processor. One end of the second control module is connected to the state indicator lamp, and the other end is connected to the central processor. The mode switch has two states of a running mode and a battery replacing mode. The state indicator lamp contained in the mode switch can indicate the fixing state of the power battery in the two states, i.e., a safe state (green light), a warning state (yellow light), and a fault state (red light).

[0012] Optionally, the position signal detection module comprises a power battery position detection module and a quick-change connector position detection module; the power battery position detection module comprises a power battery position detection unit, a locking mechanism position detection unit, a battery position sensor and a locking mechanism position sensor; the quick-change connector position detection module comprises a quick-change connector position sensor and a quick-change connector position detection unit; the monitoring signal source generates a PWM detection signal and provides the power battery position detection circuit and the quick-change connector position detection circuit composed of the above elements; the power battery position detection circuit is provided with at least four parallel paths (matching the number of power battery fixed locking mechanisms), each path comprising two power battery position sensors and one locking mechanism position sensor, one end of the three position sensors being connected to the monitoring signal source and the other end being connected to the power battery position detection unit and the locking mechanism position detection unit respectively, the power battery position detection unit transmitting detection data to the central processor and the locking mechanism position detection unit transmitting detection data to the central processor; similarly, the number of quick-change connector position detection circuits is matched with the number of quick-change connectors, and each quick-change connector is provided with a detection circuit; one end of the quick-change connector position sensor is connected to the monitoring signal source and the other end is connected to the quick-change connector position detection unit, and the quick-change connector position detection unit transmits detection data to the central processor.

[0013] Optionally, the quick-change battery fixed situation awareness system accurately identifies the situation of the power battery based on the preset program processing of the position signal detection module signals, and can identify whether the power battery is in a fixed state or a non-fixed state during operation, and whether the power battery is installed or disassembled during battery replacement.

[0014] Optionally, the control module comprises a first control module and a second control module; the first control module comprises a VCU locking unit and a locking motor controller, the VCU locking unit receives instructions from the central processor, locks the VCU when the vehicle is in the battery replacement mode to prevent misoperation caused by high voltage power-on, and releases the VCU lock when the vehicle is in the running mode; the locking motor controller receives instructions from the central processor, drives the locking motor to lock or unlock the power battery pack when the vehicle is in the battery replacement mode, and releases the control of the locking motor when the vehicle is in the running mode to prevent misoperation caused by artificial or road impact on the bottom of the battery; the second control module receives instructions from the central processor and controls the state indicator light to display the position state of the power battery and the connection state of the quick-change connector in real time.

[0015] Optionally, the communication module comprises a wireless communication unit and a CAN communication unit; the wireless communication unit is used for data exchange and communication with a charging and battery swapping station or a cloud, and cooperates to complete the battery swapping operation of the vehicle; the CAN communication unit is arranged between the central processor and a vehicle control unit (VCU), increases the nodes of the CAN network by analyzing the original vehicle CAN protocol, realizes the grid-connected operation of the fast-swapping power battery safety state monitoring system and the original vehicle network, effectively identifies the current state of the battery pack, and executes the corresponding degradation protection strategy through the VCU to avoid the generation of serious problems such as vehicle power interruption.

[0016] In addition, based on the fast-swapping battery fixed situation awareness system in any of the above solutions, the application further provides a fast-swapping battery fixed situation awareness method, and the method is as follows: No matter whether the mode switch is in the running mode or the battery swapping mode, the system monitors the fixed state of the power battery pack in real time, and the fixed state includes the mechanical fixed state of the power battery pack and the connection state of the fast-swapping connector. S1: The safety monitoring module acquires vehicle information state and position information of the mode switch, and monitors the condition of mode conversion; when the conversion condition is not met, the mode switching between the battery swapping mode and the running mode is prohibited, and the monitoring result is sent to the central processor.

[0017] S2: The monitoring signal source sends monitoring signals to the central processor, the fast-swapping connector position detection module, and the power battery position detection module to ensure the accuracy of the detection data.

[0018] S3: The fast-swapping connector position detection module sends the connection state information of the fast-swapping connector of the power battery pack to the central processor based on the fast-swapping connector position detection circuit; and the power battery position detection module sends the mechanical fixed state information of the power battery pack to the central processor based on the power battery position detection circuit.

[0019] S4: The central processor compares and analyzes the signals sent by the fast-swapping connector position detection module and the power battery position detection module and the original signals sent by the monitoring signal source based on the preset program; when the difference between the two exceeds the preset difference threshold, it is determined that the connection state or the fixed state of the power battery is abnormal. S5: The central processor executes the corresponding control strategy according to the analysis result; in the running mode, the system controls the corresponding state indicator lamp to be lit based on the preset program through the second control module; in the battery swapping mode, in addition to lighting the state indicator lamp, the system also locks the vehicle control unit (VCU) and controls the locking motor to be unlocked or locked through the first control module based on the preset program.

[0020] Advantages The quick-change battery fixation situation awareness system and method of the application has the following beneficial effects: 1. Full-time dynamic monitoring, accurate risk identification: through real-time monitoring of mechanical fixation state and electrical connection state in two dimensions, the system can perceive the battery installation state at all times, accurately identify abnormalities such as looseness and poor connection, avoid the lag risk caused by passive protection in the prior art, and the detection coverage rate reaches 100%.

[0021] 2. Hierarchical safety strategy, active defense against accidents: a three-level response mechanism of "early warning-downgrade-protection", which reduces the accident rate by more than 90%.

[0022] Real-time early warning: the yellow / red light is lit within 100ms after the abnormality is triggered, and the alarm information is pushed to the vehicle HMI and the cloud at the same time; Power limit control: limit the output power through VCU (the minimum can be reduced to 30%), and ensure that the vehicle can limp to a safe area; Emergency disconnection: for irreversible faults (such as connector falling off), forcibly cut off the high-voltage loop and lock the VCU to eliminate the risk of power interruption.

[0023] 3. Mode switching intelligent control, eliminate misoperation Combined with the vehicle state (vehicle speed, gear, parking signal) and mode switch logic, the system dynamically locks the "battery replacement-operation" mode switching permission, avoids high-voltage power-up in non-safe state, and the success rate of misoperation interception reaches 99.9%.

[0024] 4. High compatibility and low power consumption design Adapt to passenger cars, commercial vehicles and energy storage equipment, hardware reuse rate is improved; the standby power consumption of the system is ≤2W, the running power consumption is ≤15W, which is more energy-saving than similar solutions and meets the low-energy consumption demand of electric vehicles.

[0025] 5. Full life cycle data empowerment The communication module supports cloud storage and analysis of battery replacement process data (such as locking force and connection resistance), provides data support for battery health management and battery swap station operation optimization, and prolongs the service life of the battery by about 15%. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure block diagram of the quick-change battery fixation situation awareness system of the application; Figure 2 The structure block diagram of the quick-change battery fixation situation awareness system of the application; Figure 3 The connection diagram of the quick-change connector provided in the embodiment of the application Figure 1 ; Figure 4 The connection diagram of the quick-change connector provided in the embodiment of the applicationFigure 2 ; Figure 5 The schematic diagram of the quick-change battery and sensor mounting structure provided in the embodiment of the present application Figure 1 ; Figure 6 The schematic diagram of the quick-change battery and sensor mounting structure provided in the embodiment of the present application Figure 2 (Note: the dashed line in the figure represents the connection of other position sensors).

[0027] Markings in the figure: 101-power module, 102-monitoring signal source, 103-quick-change connector position detection module, 104-power battery position detection module, 105-safety monitoring module, 106-second control module, 107-first control module, 108-communication module, 109-central processing unit, 110-vehicle state data, 111-quick-change connector, 301-quick-change connector position detection unit, 302-quick-change connector position sensor, 401-locking mechanism position detection unit, 402-power battery position detection unit, 403-locking mechanism position sensor, 404-battery position sensor, 405-battery position sensor, 501-safety monitoring unit, 502-status indicator light, 503-mode switch, 701-VCU locking unit, 702-locking motor controller, 801-CAN communication unit, 802-wireless communication unit, 201-battery guiding mechanism, 202-battery pack quick-change mechanism.

[0028] The quick-change battery fixed situation awareness system and method provided by the present application aims to overcome the defects of the prior art, improve the safety and reliability of the battery quick-change system, and thus enhance the overall safety performance of the battery replacement vehicle. DETAILED DESCRIPTION

[0029] The present application will be further described below in conjunction with the accompanying drawings.

[0030] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application, and it should be further pointed out that, for the convenience of description, only parts related to the present application are shown in the drawings, but not all.

[0031] For reference Figures 1-6The fast-changing battery fixation situation awareness system and method in the embodiment is used for real-time monitoring of the fixed state of the power battery and the connection state of the fast-changing connector, identifying the situation of the power battery, implementing corresponding control strategies based on safety principles, providing safety guarantee for the running vehicle, and providing safety monitoring and warning when the battery changing operation is performed.

[0032] Specifically, Figure 1 、 2 The design intention of the embodiment is illustrated, and the fast-changing battery fixation situation awareness system includes a power module 101, a monitoring signal source 102, a safety monitoring module 105, a fast-changing connector position detection module 103, a power battery position detection module 104, a central processing unit 109, a first control module 107, a second control module 106, and a communication module 108.

[0033] The power module 101 provides stable and reliable working voltage for each functional module. The monitoring signal source 102 provides monitoring signals for the monitoring object and reference signals for the central processing unit 109. The safety monitoring module 105 is used to set the working mode of the vehicle: battery changing or running, and monitor whether the conditions for switching between the two modes are met. If the switching conditions are not met, the battery changing and running states are prohibited from switching with each other. The mode switching needs to meet the following conditions simultaneously: vehicle speed = 0 km / h; gear is in P or N; parking brake signal is effective. If any condition is not met, the safety monitoring unit 501 prohibits mode switching.

[0034] The position signal detection module includes the power battery position detection module 104 and the fast-changing connector position detection module 103, which is used to collect the fixed state information of the power battery and the connection state information of the fast-changing connector 111, and provide related state parameters for the central processing unit 109. The central processing unit 109 makes corresponding control instructions according to the data of the safety monitoring module 105, the fast-changing connector position detection module 103, and the power battery position detection module 104. The control module includes the first control module 107 and the second control module 106, which drives related elements to work according to the control instructions of the central processing unit 109, and realizes the control of the state indicator light 502 (fast-changing battery), the vehicle control unit VCU, and the locking motor. The communication module 108 includes a wireless communication unit 802 and a CAN communication unit 801, which is used for data exchange and communication between the fast-changing battery fixation situation awareness system and the vehicle control unit VCU and the battery charging and changing station.

[0035] Further, the power module 101 has under-voltage, over-voltage, overload and reverse protection functions, has a DC 7-20V wide range of input voltage, has an output voltage including +12V, -12V, 5V, 3.3V and the like, has a rated current not less than 10A, and can provide stable working power for the fast-changing power battery safety state monitoring system, can select a suitable switching power supply, and can also build a power supply that meets the requirements.

[0036] Further, the monitoring signal source 102 uses a function (waveform) signal generator to provide monitoring signals for the monitoring object and reference signals for the central processor 109, and can also select or build a suitable signal source according to the EMC environment of the working site.

[0037] Further, the safety monitoring module 105 includes a mode switch 503 (containing a state indicator 502) and a safety monitoring unit 501, and the safety monitoring module 105 is used for safety management, and when the mode conversion condition is not met, mutual switching between the battery changing and running modes is prohibited to prevent safety accidents caused by misoperation; The mode switch 503 transmits signals to the safety monitoring unit 501, the safety monitoring unit 501 simultaneously collects vehicle state data 110 such as speed signals, gear signals and parking brake signals of the vehicle, identifies whether the vehicle is in the battery changing or running state according to the vehicle state data 110, and transmits the result to the central processor 109; when the vehicle is in the running state, even if the mode switch 503 is placed in the battery changing mode position, the safety monitoring unit 501 will only output the running mode signal to the central processor 109, the system is in the running monitoring state, and will not be switched to the battery changing monitoring mode, preventing safety accidents caused by misoperation; when the vehicle is in the P / N gear and the parking brake is pulled up, and the mode switch 503 is in the battery changing mode position, the safety monitoring unit 501 will only output the battery changing mode signal to the central processor 109, and the system will be switched to the battery changing monitoring mode, the VCU will be cut off, and the control of the locking motor will be performed according to the battery position signal; The second control module 106 is connected to the state indicator 502 at one end and connected to the central processor 109 at the other end. The mode switch 503 has two states, running mode and battery replacement mode. The state indicator 502 contained therein can indicate the safe state (green light), warning state (yellow light) and fault state (red light) of the power battery in the two states respectively. The second control module 106 controls the corresponding light according to the signal output by the central processor 109; when the system function is normal, the green light is on, when any one of the power battery fixed state detection circuit and the quick connector detection circuit fails, the yellow light is on for safety warning, the central processor 109 transmits the signal to the VCU through the CAN communication unit 801, the VCU controls the vehicle to run at low power and opens the limp function; when two or more of the power battery fixed state detection circuit and the quick connector detection circuit fail, the red light is on and the system enters the fault state, the central processor 109 transmits the signal to the VCU through the CAN communication unit 801, the VCU controls the vehicle to power off and cuts off the power output, and opens the protection function to prevent safety accidents.

[0038] Further, in combination with Figure 5 and Figure 6 , the position signal detection module includes a power battery position detection module 104 and a quick connector position detection module 103; the power battery position detection module 104 includes a power battery position detection unit 402, a locking mechanism position detection unit 401, battery position sensors 404, 405 and locking mechanism position sensors 403, the battery pack is installed with the battery pack quick replacement mechanism 202 through the battery guide mechanism 201, and the battery position sensors 404, 405 and the locking mechanism position sensors 403 are installed on the battery guide mechanism 201; the quick connector position detection module 103 includes a quick connector position sensor 302 and a quick connector position detection unit 301; Further, the monitoring signal source 102 generates PWM detection signals and provides them to the power battery position detection circuit and the quick connector position detection circuit composed of the above-mentioned elements; the power battery position detection circuit is provided with at least four parallel paths (matching the number of power battery locking mechanisms), each path including two power battery position sensors and one locking mechanism position sensor, one end of the three position sensors being connected to the monitoring signal source 102 and the other end being connected to the power battery position detection unit 402 and the locking mechanism position detection unit 401 respectively, the power battery position detection unit 402 transmitting detection data to the central processor 109, and the locking mechanism position detection unit 401 transmitting detection data to the central processor 109; Similarly, in combination with Figure 3The number of the quick-change connector position detection circuits matches the number of the quick-change connectors 111, and each quick-change connector 111 is provided with a detection circuit; one end of the quick-change connector position sensor 302 is connected to the monitoring signal source 102, and the other end is connected to the quick-change connector position detection unit 301, which transmits detection data to the central processor 109; Preferably, the quick-change battery fixation situation awareness system accurately identifies the situation of the power battery based on the preset program processing of the position signal detection module signal, and can identify whether the power battery is in a fixed state or a non-fixed state during operation, and can also identify whether the power battery is installed or disassembled during battery replacement.

[0039] Preferably, in combination with Figure 4 The quick-change connector detection circuit can also adopt a double-loop control mode, and each quick-change connector 111 is provided with two position detection circuits, and the detection terminals Ki of the two circuits are long and short pins; when both circuits are turned on, the quick-change connector detection circuit confirms that the quick-change connector 111 is in a fully connected state, and the vehicle is in a normal state, and when both circuits are not turned on, it is confirmed that the quick-change connector is detached or not connected, and the vehicle enters a forbidden state; when one is on and the other is off, it is confirmed that the quick-change connector 111 is not properly connected, the system prompts a fault, and the vehicle enters a limited power running state.

[0040] Further, the control module includes a first control module 107 and a second control module 106; the first control module 107 includes a VCU locking unit 701 and a locking motor controller 702, the VCU locking unit 701 receives instructions from the central processor 109, and when the vehicle is in a battery replacement mode, the VCU is locked to prevent misoperation caused by high voltage power-on, and when the vehicle is in a running mode, the VCU is unlocked; the locking motor controller 702 receives instructions from the central processor 109, and when the vehicle is in a battery replacement mode, drives the locking motor to lock or unlock the power battery pack, and when the vehicle is in a running mode, the control of the locking motor is released to prevent misoperation caused by artificial or road impact on the bottom of the battery; the second control module 106 receives instructions from the central processor 109, controls the state indicator light 502, and displays the position state of the power battery and the connection state of the quick-change connector 111 in real time.

[0041] Further, the communication module 108 comprises a wireless communication unit 802 and a CAN communication unit 801; the wireless communication unit 802 is used for data exchange and communication with a charging and battery swapping station or a cloud, and cooperates to complete the battery swapping operation of the vehicle; the CAN communication unit 801 is arranged between the central processor 109 and a vehicle control unit VCU; by analyzing the original vehicle CAN protocol, the node of the CAN network is increased, the fast-swapping battery fixed situation awareness system and the original vehicle network are connected in grid, and the fixed state of the battery pack is effectively identified; when the fast-swapping battery fixed situation awareness system detects a fault, the corresponding degradation protection strategy is executed through the VCU, and the generation of serious problems such as interruption of vehicle power is avoided.

[0042] Further, based on the fast-swapping battery fixed situation awareness system in any of the above solutions, the application further provides a fast-swapping battery fixed situation awareness method, and the steps are as follows: S1: mode switching verification: the safety monitoring module 105 scans the position of the mode switch 503 in real time, when a switching request is detected, immediately verifies the three conditions of “vehicle speed = 0”, “gear = P / N” and “parking brake in effect” through the CAN bus, and if all the conditions are met, the mode switching is allowed, otherwise the current mode is maintained and the exception is recorded.

[0043] S2: state signal acquisition: the position signal detection module continuously works, the power battery position detection module 104 acquires the distance between the battery and the vehicle body and the position data of the locking mechanism through sensors; the fast-swapping connector position detection module 103 acquires the double-loop conduction state, and the data is uploaded to the central processor 109 after filtering processing.

[0044] S3: signal comparison and determination: the central processor 109 compares the detected signals with the original PWM signals of the monitoring signal source 102, calculates the amplitude deviation, frequency deviation and waveform distortion rate, and determines that the state is abnormal when any parameter exceeds the preset threshold.

[0045] S4: running mode control: if the running mode is abnormal, the central processor 109 sends an instruction to the second control module 106 to control the state indicator light 502 to light up the corresponding color, and sends a power reduction instruction to the VCU through the CAN communication unit 801 to limit the power output.

[0046] S5: battery swapping mode control: if the battery swapping mode is abnormal, the central processor 109 controls the state indicator light 502, locks the VCU (prohibits power-on) through the first control module 107, and drives the locking motor to perform locking (when not fixed) or unlocking (when disassembling fails) action according to the type of the abnormality.

[0047] Beneficial effects: Through step-by-step verification, real-time collection, accurate comparison and pattern control, the whole-process closed-loop management from mode switching to state response is realized, solving the problems of response lag and control logic confusion of traditional systems.

[0048] Further, the abnormal response mechanism in the running mode is set as follows: The central processor 109 has an abnormality determination threshold: mechanical fixed displacement ≥ 1mm (calculated by the distance change detected by the battery position sensor), electrical connection impedance deviation ≥ 2% (converted by the amplitude attenuation of PWM signal).

[0049] When any of the above abnormalities is detected, the central processor immediately sends an instruction to the second control module 106 to light up the state indicator light 502 yellow light (warning state), and at the same time sends a power limiting instruction to the VCU through the CAN communication unit 801, forcing the output power to be limited to 30% of the rated power.

[0050] After the vehicle enters the limp state, the central processor 109 continuously monitors the state change, and if the abnormality is eliminated, it automatically removes the limitation; if the abnormality is aggravated, it triggers higher level protection.

[0051] By quantifying the abnormal threshold, early warning of minor faults is realized, and limiting the power to 30% can ensure that the vehicle can safely drive to the maintenance site, avoiding power interruption or battery falling accidents caused by not timely handling of minor faults.

[0052] Further, the connector falling protection mechanism in the battery replacement mode is set as follows: The quick-change connector position detection module 103 monitors the state of the double circuit in real time, and when both detection circuits output "open" signals (duration ≥ 100ms), it is determined that the "connector has fallen off".

[0053] After the central processor 109 receives the falling signal, it immediately triggers three levels of protection: sends an instruction to the second control module 106 to light up the state indicator light 502 red light (fault state); forcibly locks the VCU through the VCU lock unit 701 of the first control module 107; sends a high-voltage cut-off instruction to the vehicle high-voltage box to disconnect the main relay and cut off the high-voltage circuit.

[0054] At the same time, the wireless communication unit 802 sends an alarm message to the charging and battery replacement station cloud to prompt the staff to handle.

[0055] Beneficial effects: The double-circuit failure determination ensures accurate identification of the falling state, and the high-voltage circuit is forcibly cut off to avoid the risk of high-voltage arc or electric shock caused by connector falling, providing key safety protection for battery replacement personnel.

[0056] The above specific embodiments realize accurate perception and safe control of the fixed state and the connected state of the quick-change battery through modular design, quantitative threshold control and multi-level response mechanism, and significantly improve the safety and reliability of the battery replacement process and vehicle operation.

[0057] The above merely describes preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A quick-change battery fixed situational awareness system, characterized in that: include: A power supply module (101) provides operating voltage for each functional module; The safety monitoring module (105) comprises a mode switch (503) and a safety monitoring unit (501), wherein the mode switch (503) has two states: an operating mode and a battery replacement mode, and the safety monitoring unit (501) collects a vehicle speed signal, a gear position signal, and a parking brake signal; Position signal detection module, including: A power battery position detection module (104) collects the mechanical fixation status of the power battery; A quick-change connector position detection module (103) collects the electrical connection status of the quick-change connector (111); A monitoring signal source (102) generates a PWM signal and outputs the signal to a power battery position detection module (104) and a quick-change connector position detection module (103); A central processing unit (109) generates control instructions based on output signals of the safety monitoring module (105) and the position signal detection module; Control module, including: A first control module (107) controls the vehicle controller VCU and the locking motor; A second control module (106), the second control module (106) being electrically connected to a status indicator light (502); The communication module (108) includes a wireless communication unit (802) and a CAN communication unit (801).

2. The quick-change battery fixed situational awareness system according to claim 1, characterized in that: The power supply module (101) supports DC7-20V input and has undervoltage, overvoltage, overload and reverse protection functions.

3. The quick-change battery fixed situational awareness system according to claim 1, characterized in that: The monitoring signal source (102) is a function signal generator.

4. The quick-change battery fixed situational awareness system according to claim 1, characterized in that: The safety monitoring unit (501) allows switching to the battery swap mode only when the vehicle speed is 0, the gear is in the P / N gear, and the parking brake is in effect.

5. The quick-change battery fixed situational awareness system according to claim 1, characterized in that: The power battery position detection module (104) comprises at least four detection circuits connected in parallel, each circuit consisting of two battery position sensors and one locking mechanism position sensor (403).

6. The quick-change battery fixed situational awareness system according to claim 1, characterized in that: The first control module (107) comprises: A VCU locking unit (701), locking the VCU in the battery swap mode; The locking motor controller (702) drives the locking motor to perform locking / unlocking.

7. The quick-change battery fixed situational awareness system according to claim 1, characterized in that: The quick-change connector position detection module (103) adopts dual-circuit control, and each circuit is provided with a long and short pin detection terminal.

8. A method for quick-change battery fixed situation awareness, applied to a quick-change battery fixed situation awareness system according to any one of claims 1 to 7, characterized in that: include: S1: The safety monitoring module (105) allows the mode switch only after verifying the following three conditions: vehicle speed = 0, gear position = P / N gear, and parking brake is in effect; S2: The position signal detection module collects the mechanical fixation status and electrical connection status in real time; S3: the central processing unit (109) compares the detection signal with the original PWM signal and determines an abnormality when the deviation exceeds a threshold; S4: In the operation mode, the second control module (106) controls the status indicator light (502) and triggers the VCU to reduce power operation; S5: In the battery replacement mode, the first control module (107) locks the VCU and controls the locking motor to operate.

9. The method according to claim 8, wherein: In step S4, when a mechanical fixation displacement ≥1 mm or an electrical connection impedance deviation ≥2% is detected, the connection is determined to be unreliable, triggering a yellow light warning and limiting the VCU power to 30%.

10. The method according to claim 8, wherein: In step S5, when both the dual-circuit detection circuits fail, it is determined that the connector is detached, a red light alarm is triggered, and the high-voltage circuit is forcibly cut off.

Images