Control system and method for automatic separation of power battery box

Abstract

The invention relates to a control system and method for automatic separation of a power battery box, and belongs to the technical field of power battery management systems.The system comprises a data acquisition device connected with an EUC unit, arranged on a target power battery and used for acquiring real-time data of the target power battery; the BMS system is connected with the EUC unit and used for obtaining the temperature of the battery box and sending the temperature of the battery box to the EUC unit when the temperature of the battery box is larger than a preset value; the EUC unit is used for receiving and generating a first power-on instruction based on the real-time data, and is also used for receiving and generating a second power-on instruction based on the temperature of the battery box; and the switching device is connected with the EUC unit and is used for receiving the first power-on instruction or the second power-on instruction and switching the state of the switching device from the connection state to the disconnection state according to the first power-on instruction or the second power-on instruction. The safety of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery management systems, and in particular to a control system and method for automatic detachment of a power battery box. Background Art

[0002] With the booming development of the new energy vehicle market, especially the popularity of pure electric vehicles, the demand for replacement and maintenance of power batteries has become more urgent. At present, the power battery of pure electric vehicles not only bears the important task of providing power for the vehicle, but also directly affects the vehicle's endurance and safety.

[0003] However, since pure electric vehicles use high-energy-density battery packs, single cells may spontaneously combust in high-temperature environments, causing the fire to spread rapidly. In addition, when the vehicle collides or rolls over during driving, the battery may be squeezed due to the lack of an effective detachment mechanism, causing the battery to short-circuit or even cause a fire, causing irreparable property losses to users, and in serious cases even endangering the lives of passengers.

[0004] In summary, the prior art lacks a method that can achieve intelligent separation of the battery box from the vehicle body when the vehicle is in an extreme operating state, thereby improving the safety of the vehicle. Summary of the invention

[0005] In view of this, it is necessary to provide a control system and method for automatic disengagement of a power battery box, so as to achieve intelligent disengagement of the battery box from the vehicle body when the vehicle is in an extreme operating state, thereby improving the safety of the vehicle.

[0006] In order to achieve the above object, the present invention provides a control system for automatic separation of a power battery box, comprising: A data acquisition device, connected to the EUC unit, is disposed on the target power battery and is used to collect real-time data of the target power battery, and the target power battery is disposed in the battery box; The BMS system is connected to the EUC unit to obtain the battery box temperature and send the battery box temperature to the EUC unit when the battery box temperature is greater than a preset value; The EUC unit is used to receive and generate a first power-on instruction based on the real-time data, and is also used to receive and generate a second power-on instruction based on the battery box temperature; The switching device is connected to the EUC unit and is used to receive and switch its own state from a connected state to a disconnected state according to a first power-on instruction or a second power-on instruction. The connected state is when the switching device is connected to a locking hook on the battery box, and the disconnected state is when the switching device is disconnected from the locking hook on the battery box.

[0007] In a possible implementation, the data acquisition device includes: a roll angle sensor, an acceleration sensor, and a pressure sensor; The roll angle sensor is used to obtain the roll angle of the target vehicle relative to the road surface; The acceleration sensor is used to obtain the acceleration of the target vehicle; The pressure sensor is used to obtain the pressure on the target power battery.

[0008] In a possible implementation, the EUC unit is further configured to receive and determine whether the operating state of the target vehicle is normal based on the real-time data, and generate a first power-on instruction when it is determined that the operating state of the target vehicle is abnormal.

[0009] In a possible implementation, the EUC unit is also used to receive real-time data and calculate the real-time data based on a preset neural network model to obtain the operating state of the target vehicle, and generate a first power-on instruction when it is determined that the operating state of the target vehicle is abnormal.

[0010] In a possible implementation, the BMS system is also used to obtain the remaining power and remaining life of the target power battery, and control the warning indicator light to operate when the remaining power is less than a first preset value or the remaining life is less than a second preset value.

[0011] On the other hand, the present invention further provides a control method for automatic detachment of a power battery box, which is applied to a control system for automatic detachment of a power battery box as described in any one of the above technical solutions, comprising: Obtain real-time data of the target power battery and battery box temperature; generating a first power-on instruction based on the real-time data; generating a second power-on instruction based on the battery box temperature; The first power-on instruction or the second power-on instruction is sent to the switching device to control the switching device and the lock hook on the battery box to switch from a connected state to a disconnected state.

[0012] In a possible implementation, the generating a first power-on instruction based on real-time data includes: And based on the real-time data, it is determined whether the running state of the target vehicle is normal, and when it is determined that the running state of the target vehicle is abnormal, a first power-on instruction is generated.

[0013] In a possible implementation, determining whether the target vehicle operating state is normal based on real-time data includes: The real-time data is calculated based on the preset neural network model to obtain the operating status of the target vehicle.

[0014] In a possible implementation, the preset neural network model is a gated neural network.

[0015] On the other hand, the present invention also provides a vehicle, comprising a control system for automatic detachment of a power battery box as described in any one of the above technical solutions.

[0016] The beneficial effects of the present invention are as follows: a control system for automatic separation of a power battery box provided by the present invention comprises: a data acquisition device, a BMS system, an EUC unit and a switching device, wherein the data acquisition device is connected to the EUC unit and is arranged on the target power battery for collecting real-time data of the target power battery, the BMS system is connected to the EUC unit and is used to obtain the battery box temperature, and when the battery box temperature is greater than a preset value, the battery box temperature is sent to the EUC unit, the EUC unit is used to receive and generate a first power-on instruction based on the real-time data, the real-time data is used to judge the running state of the vehicle, and is also used to receive and generate a second power-on instruction based on the battery box temperature, the switching device is connected to the EUC unit, and is used to receive and switch its own state from a connected state to a disconnected state according to the first power-on instruction or the second power-on instruction, the connected state is that the switching device is connected to the lock hook on the battery box, and the disconnected state is that the switching device is disconnected from the lock hook on the battery box, so that the battery box is separated from the target vehicle body. The present invention controls the separation of the battery box from the target vehicle body by acquiring the real-time data of the vehicle and the battery box temperature monitored by the BMS system, thereby ensuring the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of an embodiment of a control system for automatic detachment of a power battery box provided by the present invention; Figure 2 A flow chart of the separation of a battery box from a vehicle body in one embodiment of a control system for automatic separation of a power battery box provided by the present invention; Figure 3 A flow chart of a door control neural network system in one embodiment of a control system for automatic disengagement of a power battery box provided by the present invention; Figure 4 A flow chart of an embodiment of a control method for automatic separation of a power battery box provided by the present invention; Among them, 101 is a data acquisition device; 102 is a BMS system; 103 is an EUC unit; 104 is a switching device. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0019] The present invention provides a control system and method for automatic detachment of a power battery box, which are described below respectively.

[0020] First, Figure 1 A schematic flow chart of an embodiment of a control system for automatic separation of a power battery box provided by the present invention, as shown in FIG. Figure 1 As shown, the control system for automatic separation of the power battery box includes: A data acquisition device 101 is connected to the EUC unit and is disposed on a target power battery for collecting real-time data of the target power battery, and the target power battery is disposed in a battery box; The BMS system 102 is connected to the EUC unit and is used to obtain the battery box temperature and send the battery box temperature to the EUC unit when the battery box temperature is greater than a preset value; The EUC unit 103 is used to receive and generate a first power-on instruction based on the real-time data, and is also used to receive and generate a second power-on instruction based on the battery box temperature; The switching device 104 is connected to the EUC unit and is used to receive and switch its own state from a connected state to a disconnected state according to the first power-on instruction or the second power-on instruction. The connected state is when the switching device is connected to the lock hook on the battery box, and the disconnected state is when the switching device is disconnected from the lock hook on the battery box.

[0021] Compared with the prior art, the present embodiment provides a control system for automatic separation of a power battery box, comprising: a data acquisition device, a BMS system, an EUC unit and a switching device, wherein the data acquisition device is connected to the EUC unit and is arranged on the target power battery for collecting real-time data of the target power battery, the BMS system is connected to the EUC unit and is used to obtain the battery box temperature, and when the battery box temperature is greater than a preset value, the battery box temperature is sent to the EUC unit, the EUC unit is used to receive and generate a first power-on instruction based on the real-time data, the real-time data is used to judge the running state of the vehicle, and is also used to receive and generate a second power-on instruction based on the battery box temperature, the switching device is connected to the EUC unit, and is used to receive and switch its own state from a connected state to a disconnected state according to the first power-on instruction or the second power-on instruction, the connected state is that the switching device is connected to the lock hook on the battery box, and the disconnected state is that the switching device is disconnected from the lock hook on the battery box, so that the battery box is separated from the target vehicle body. The present invention controls the separation of the battery box from the target vehicle body by obtaining the real-time data of the vehicle and the battery box temperature monitored by the BMS system, thereby ensuring the safety of the vehicle.

[0022] It should be noted that the present invention is not only applicable to electric vehicles but also to other types of vehicles that require the battery to be separated from the vehicle body.

[0023] In some embodiments of the present invention, the switching device is a rotary electromagnetic locking mechanism. In order to ensure that the rotary electromagnetic lock and the lock hook can provide uniform and stable locking force when closed and prevent the battery box from deforming or loosening due to uneven force, the lock hooks are installed at the four corners of the battery box. In the initial state, that is, the state when the target vehicle is not running, that is, when the rotary electromagnetic locking mechanism is not powered, the rotary electromagnetic lock on the rotary electromagnetic locking mechanism and the lock hook on the power battery box are tightly engaged to ensure that the battery box is firmly installed on the vehicle.

[0024] In a specific embodiment of the present invention, Figure 2 The figure shows the flow chart of battery box separation from the vehicle body. The rolling angle sensor, acceleration sensor and pressure sensor are used to collect the running status of the vehicle. At the same time, the BMS system monitors the temperature of the battery box and whether the battery's health status (SOC) and remaining healthy life (RUL) need to be actively replaced in real time. The information collected by the sensor is then transmitted to the door control neural network. After the door control quickly identifies and analyzes the input information, the BMS system determines whether it needs to be separated from the vehicle body and whether it needs to be actively replaced based on the temperature of the battery box and the battery's health status (SOC) and remaining healthy life (RUL). These results are transmitted to the microcontroller (MCU) module of the electronic control ECU unit through CAN communication. The microcontroller (MCU) is responsible for running the GRU neural network algorithm and performing real-time processing and decision-making on the input data. Finally, the electronic control ECU unit sends a power-on command to the rotary electromagnetic locking mechanism through the CAN bus with the help of a code based on the processing results, and achieves the separation effect of the battery box from the vehicle body by changing the connection state of the rotary electromagnetic lock buckle and the lock hook.

[0025] In some embodiments of the present invention, the data acquisition device includes: a roll angle sensor, an acceleration sensor, and a pressure sensor; The roll angle sensor is used to obtain the roll angle of the target vehicle relative to the road surface; The acceleration sensor is used to obtain the acceleration of the target vehicle; The pressure sensor is used to obtain the pressure on the target power battery.

[0026] In some embodiments of the present invention, the EUC unit is further used to receive and determine whether the operating state of the target vehicle is normal based on real-time data, and generate a first power-on instruction when it is determined that the operating state of the target vehicle is abnormal.

[0027] In some embodiments of the present invention, the EUC unit is also used to receive real-time data and calculate the real-time data based on a preset neural network model to obtain the operating state of the target vehicle, and generate a first power-on instruction when it is determined that the operating state of the target vehicle is abnormal.

[0028] In a specific embodiment of the present invention, the real-time data of the vehicle is collected through the roll angle sensor, acceleration sensor and pressure sensor, and the real-time data is transmitted to the microcontroller (MCU) module of the ECU control unit. The microcontroller (MCU) is responsible for running the GRU neural network algorithm to perform real-time processing and decision-making on the input real-time data. Specifically, the real-time data is input into the GRU neural network to obtain the running status characteristics of the target vehicle, that is, whether rollover or collision occurs. Figure 3 As shown, the specific algorithm flow is as follows: Working process of the reset gate: At time step t, the GRU receives the current vehicle operating status information, i.e. the roll angle of the target vehicle relative to the road surface, the acceleration of the target vehicle, and the pressure on the target power battery as input and the vehicle's operating status information at the previous moment as the hidden state . Then use the hidden state of the previous moment , by using a linear transformation and sigmoid activation function to calculate the reset gate The sigmoid activation function mainly outputs a value of [0,1] for the input information value. When the output value is close to 1, it means that the vehicle's operating status information at this time is very relevant to the occurrence of rollover or collision. This information will be retained as a basis for further analysis; when the output value is close to 0, it means that the vehicle's operating status information at this time is very low in terms of the occurrence of rollover or collision. This information will not be used as a basis for affecting the vehicle's operating status and will be forgotten. Reset gate It mainly controls the amount of vehicle motion status information output at the previous moment that is forgotten and the amount of vehicle operation status information input at the current moment that is added. The smaller the value, the more the vehicle motion information that was forgotten at the last moment The more there are, the safer the vehicle's movement is. The larger the value, the more the vehicle motion information that was forgotten at the last moment The less the number, the more dangerous the vehicle's motion state is, and the more likely the vehicle is to roll over or collide. Acts on the hidden state at the previous moment , get a reset hidden state , the reset hidden state obtained at this time only contains the information about the vehicle's rollover and collision; then the current newly input vehicle operation information Combined with the reset hidden state, after a linear transformation and a transformation of the double tangent tanh activation function, the candidate hidden state is obtained At this time, the candidate hidden information includes the newly input vehicle operation status information at the current moment and the processed information that only contains the information about the vehicle rolling over and colliding as the output of the reset gate. The relevant mathematical expression of the reset gate working process is:

[0029] in, and represents the weight matrix; and Represents the bias term, which is used to adjust the result during linear transformation; Indicates the hidden state of the vehicle's running status information at the last moment; Indicates the running status information of the vehicle at the current moment; Indicates the newly input vehicle operation status information at the current moment and the processed information only contains the information about the vehicle rolling over and colliding; Represents element-wise multiplication.

[0030] The working process of the update gate: the output candidate hidden information of the reset gate contains the vehicle running status information newly input at the current moment and the processed information containing only the information about the vehicle rolling over and collision as the input of the update gate. The update gate is further calculated through a linear transformation and sigmoid activation function. The sigmoid activation function also mainly processes the information that affects the vehicle's motion state output by the reset gate and outputs a value of [0,1]. When the output value is close to 1, it means that the vehicle's operating state information at this time is more relevant to rollover or collision, and this information will be retained as the main vehicle motion state feature; when the output value is close to 0, it means that the vehicle's operating state information at this time is less relevant to rollover or collision, and this information will also not be used as a feature that affects the vehicle's operating state. Update gate Mainly controls how much of the vehicle motion state information input at the current moment can be used as a feature that affects the vehicle's operating state. When it is 0, all the input status information is used as the main feature; When it is 1, the input information is not used as the main feature and is discarded. The output features after the update gate processing only contain the feature information of the current moment and the information of the vehicle rolling over and colliding at the previous moment. The relevant mathematical expression of the update gate working process is:

[0031] in, represents the weight matrix; Represents the bias term.

[0032] Update the hidden state and combine it with the update gate The feature output and the hidden state feature of the previous moment and candidate hidden state features To update the hidden state at the current moment , Indicates that at time step The output of all can affect the characteristic results of whether the vehicle's running state has a rollover or a collision. The relevant mathematical expression is:

[0033] in, Indicates that at time step The output of all the characteristic results that can affect whether the vehicle running state is abnormal; Indicates the amount of vehicle danger feature information output at the previous moment.

[0034] The microcontroller (MCU) on the ECU unit outputs the operating status characteristics of the electric vehicle (whether rollover or collision occurs) and other extreme conditions. When it is determined that the target vehicle has an extreme state such as rollover or collision, the ECU unit generates a first power-on command based on real-time data. The electronic control ECU unit issues the first power-on command to the rotary electromagnetic locking mechanism. When the electromagnetic coil is energized, a magnetic field will be generated, which will attract the armature to move under the action of the magnetic field force. The armature drives the rotating shaft of the rotary electromagnetic lock to rotate, so that the rotary electromagnetic lock is separated from the corresponding lock hook installed on the battery box, thereby releasing the lock of the battery box by the electromagnetic lock, and then the battery box is separated from the vehicle body, and the information after the separation is fed back to the electronic control ECU unit through CAN communication as a feedback signal.

[0035] When the target vehicle encounters extreme conditions such as rollover, external force collision, etc., the ECU unit controls the power on and off of the rotary electromagnetic locking mechanism, further causing the battery box to fall off, in order to prevent the battery box from being hit and squeezed and further causing spontaneous combustion and explosion.

[0036] In some embodiments of the present invention, the BMS system is also used to obtain the remaining power and remaining life of the target power battery, and control the warning indicator light to operate when the remaining power is less than a first preset value or the remaining life is less than a second preset value.

[0037] In a specific embodiment of the present invention, when the BMS system detects that the temperature in the battery box reaches 130 degrees Celsius, the BMS system sends this temperature information to the electronic control ECU unit, and then the electronic control ECU unit sends a second power-on command to the rotary electromagnetic locking mechanism through the CAN bus with the help of a code. After the electromagnetic coil is energized, a magnetic field is generated, and the armature is attracted to move under the action of the magnetic field force. The armature drives the rotating shaft of the rotary electromagnetic lock to rotate, so that the rotary electromagnetic lock is separated from the corresponding lock hook installed on the battery box, thereby releasing the lock of the battery box by the electromagnetic lock, and then the battery box is separated from the vehicle body, and the information after the separation is fed back to the electronic control ECU unit as a feedback signal through CAN communication; When the BMS system detects that the battery box seriously affects the normal driving range of the electric vehicle due to the battery's SOH and RUL, the warning indicator light in the BMS system will display battery failure information on the dashboard. If the user does not handle the alarm, the BMS system will continue to alarm. In this state, the electronic control ECU unit does not energize the rotary electromagnetic locking mechanism, and the battery box is in a locked and fixed state through the rotary electromagnetic lock. At this time, the rotary electromagnetic lock is tightly engaged with the lock hook to ensure that the battery box is firmly installed on the vehicle; if the user decides to replace the battery box, the driver should first check the vehicle and The status of the battery box is checked and confirmed to ensure that the conditions for the battery box to fall off are met, such as the vehicle has stopped and the surrounding environment is safe. At this time, the user actively activates the command to replace the battery box, and the electronic control ECU unit will power on the rotary electromagnetic locking mechanism according to the user's intention. After the electromagnetic coil is energized, a magnetic field is generated to attract the armature, and the armature drives the rotating shaft of the rotary electromagnetic lock to rotate, so that the rotary electromagnetic lock buckle is separated from the corresponding lock hook structure, thereby releasing the lock on the battery box, and then the battery box is separated from the vehicle body, and the information after the fall off is fed back to the electronic control ECU unit as a feedback signal through CAN communication.

[0038] Second, as Figure 4 As shown, the present invention also provides a control method for automatic separation of a power battery box, which is applied to a control system for automatic separation of a power battery box as described in any one of the above technical solutions, comprising: S401, obtaining real-time data of a target power battery and a battery box temperature; S402, generating a first power-on instruction based on real-time data; S403, generating a second power-on instruction based on the battery box temperature; S404: Send the first power-on instruction or the second power-on instruction to the switching device to control the switching device and the lock hook on the battery box to switch from a connected state to a disconnected state.

[0039] In some embodiments of the present invention, generating a first power-on instruction based on real-time data includes: And based on the real-time data, it is determined whether the running state of the target vehicle is normal, and when it is determined that the running state of the target vehicle is abnormal, a first power-on instruction is generated.

[0040] In some embodiments of the present invention, determining whether the target vehicle operating state is normal based on real-time data includes: The real-time data is calculated based on the preset neural network model to obtain the operating status of the target vehicle.

[0041] In some embodiments of the present invention, the preset neural network model is a gated neural network.

[0042] In a third aspect, the present invention further provides a vehicle, comprising a control system for automatic detachment of a power battery box as described in any one of the above technical solutions.

[0043] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A control system for automatic disengagement of a power battery box, characterized in that: include: A data acquisition device, connected to the EUC unit, is disposed on the target power battery and is used to collect real-time data of the target power battery, and the target power battery is disposed in the battery box; The BMS system is connected to the EUC unit to obtain the battery box temperature and send the battery box temperature to the EUC unit when the battery box temperature is greater than a preset value; The EUC unit is used to receive and generate a first power-on instruction based on the real-time data, and is also used to receive and generate a second power-on instruction based on the battery box temperature; The switching device is connected to the EUC unit and is used to receive and switch its own state from a connected state to a disconnected state according to a first power-on instruction or a second power-on instruction. The connected state is when the switching device is connected to a locking hook on the battery box, and the disconnected state is when the switching device is disconnected from the locking hook on the battery box.

2. The control system for automatic disengagement of the power battery box according to claim 1, characterized in that: The data acquisition device includes: a roll angle sensor, an acceleration sensor and a pressure sensor; The roll angle sensor is used to obtain the roll angle of the target vehicle relative to the road surface; The acceleration sensor is used to obtain the acceleration of the target vehicle; The pressure sensor is used to obtain the pressure on the target power battery.

3. The control system for automatic disengagement of the power battery box according to claim 1, characterized in that: The EUC unit is further used to receive and determine whether the target vehicle's operating state is normal based on the real-time data, and generate a first power-on instruction when it is determined that the target vehicle's operating state is abnormal.

4. The control system for automatic disengagement of the power battery box according to claim 3, characterized in that: The EUC unit is also used to receive real-time data and calculate the real-time data based on a preset neural network model to obtain the operating state of the target vehicle, and generate a first power-on instruction when it is determined that the operating state of the target vehicle is abnormal.

5. The control system for automatic disengagement of the power battery box according to claim 1, characterized in that: The BMS system is also used to obtain the remaining power and remaining life of the target power battery, and control the warning indicator light to work when the remaining power is less than a first preset value or the remaining life is less than a second preset value.

6. A control method for automatic detachment of a power battery box, based on the control system for automatic detachment of a power battery box according to any one of claims 1 to 5, characterized in that: include: Obtain real-time data of the target power battery and battery box temperature; generating a first power-on instruction based on the real-time data; generating a second power-on instruction based on the battery box temperature; The first power-on instruction or the second power-on instruction is sent to the switching device to control the switching device and the lock hook on the battery box to switch from a connected state to a disconnected state.

7. The control method for automatic separation of the power battery box according to claim 6, characterized in that: The generating a first power-on instruction based on the real-time data comprises: And based on the real-time data, it is determined whether the running state of the target vehicle is normal, and when it is determined that the running state of the target vehicle is abnormal, a first power-on instruction is generated.

8. The control method for automatic separation of the power battery box according to claim 7, characterized in that: Determine whether the target vehicle is operating normally based on real-time data, including: The real-time data is calculated based on the preset neural network model to obtain the target vehicle operating status.

9. The control method for automatic separation of the power battery box according to claim 8, characterized in that: The preset neural network model is a gated neural network.

10. A vehicle, characterized in that: The vehicle includes a control system for automatically disengaging the power battery box as described in any one of claims 1 to 5.

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