Intelligent box with safety auxiliary system

Abstract

The invention relates to the technical field of wheel type chassis power supply system control, and discloses an intelligent box with a safety auxiliary system. The safety auxiliary system comprises a driving and parking braking power supply and control management system, a 48V power electricity and DC-DC output 12V / 24V electricity distribution management system, an intelligent triggering sudden stop and manual triggering sudden stop management system and a 48V power battery and 12V standby battery autonomous charging management system. The driving and parking braking power supply and control management system is used for switching between a 48V power battery and a 12V standby battery to supply power to driving and parking braking and controlling the driving and parking braking; the 48V power electricity and DC-DC output 12V / 24V electricity distribution management system is used for controlling 12V and 24V output of DC-DC; the intelligent triggering sudden stop and manual triggering sudden stop management system is used for intelligently triggering sudden stop or manually triggering sudden stop in emergency; and the 48V power battery and 12V standby battery autonomous charging management system is used for controlling the charging of the 48V power battery and the 12V standby battery.

Description

Technical Field

[0001] The invention relates to the technical field of wheel chassis power system control, and in particular to an intelligent box with a safety auxiliary system. Background Art

[0002] The existing wheeled chassis has the following problems when operating during the test climbing process and under the conditions of the software debugging stage, as follows:

[0003] (1) Climbing power failure and loss of control

[0004] During the hill climbing test, the existing wheeled chassis experienced a total power loss of 48V power, brake failure, and loss of control of the entire vehicle.

[0005] (2) The program ran out of control during the test

[0006] The program of the existing wheeled chassis ran away during the testing phase, and the emergency brake control command could not be issued in time, resulting in brake loss of control.

[0007] (3) No autonomous charging function

[0008] The existing wheeled chassis does not have autonomous charging control functions and does not meet the market demand for intelligent applications of unmanned vehicles.

[0009] (4) No emergency stop function in case of loss of control

[0010] The existing wheeled chassis does not have an emergency stop function while traveling, and does not meet the requirements for vehicle application safety. Summary of the invention

[0011] The present invention provides a smart box with a safety auxiliary system, which can solve the technical problems in the prior art.

[0012] The present invention provides a smart box with a safety assistance system, wherein the smart box includes a safety assistance system, the safety assistance system includes a driving and parking brake power supply and control management system, a 48V power electricity and DC-DC output 12V / 24V power distribution management system, an intelligent trigger emergency stop and a manual trigger emergency stop management system, and a 48V power battery and a 12V backup battery autonomous charging management system, wherein:

[0013] The service and parking brake power supply and control management system is used to switch between the 48V power battery and the 12V backup battery to power the service and parking brakes and to control the service and parking brakes;

[0014] The 48V power battery and DC-DC output 12V / 24V power distribution management system are used to control the 12V and 24V outputs of the DC-DC. The 48V power battery and 12V backup battery are connected in parallel with the chassis master controller, service brake and parking brake controllers;

[0015] The intelligent trigger emergency stop and manual trigger emergency stop management system is used to intelligently trigger emergency stop or manually trigger emergency stop in emergency situations;

[0016] The 48V power battery and 12V backup battery autonomous charging management system is used to control the charging of the 48V power battery and 12V backup battery.

[0017] Preferably, the 48V power electricity and DC-DC output 12V / 24V power distribution management system includes a first MOSFET chip and a second MOSFET chip, the 12V backup battery is connected to the first MOSFET chip, and the 48V power battery is connected to the second MOSFET chip through a DC-DC 12V power supply. The first MOSFET chip is used to control the 48V power battery output 12V, and the second MOSFET chip is used to control the 12V backup battery output 12V. The first MOSFET chip and the second MOSFET chip realize switching between the 48V power battery output 12V and the 12V backup battery output 12V according to the potential change of the pin.

[0018] Preferably, the power battery and auxiliary battery intelligent control system includes a power management chip, a first power switch control chip and a second power switch control chip. The first power switch control chip is used to delay timing, and the second power switch control chip is used to control the power supply in a timing manner. The 24V output of DCDC is controlled by FLAG1 of the second power switch control chip, and the 12V output of DCDC is controlled by FLAG2 of the second power switch control chip. The digital isolator is entered through FLAG3 of the second power switch control chip to prevent overcharging of the 48V power battery. The power management chip is used to prevent the 48V power battery from charging the 12V backup battery.

[0019] Preferably, the intelligently triggered emergency stop and manually triggered emergency stop management system includes an emergency stop relay and an operation terminal. An emergency stop signal emitted by the operation terminal is sent to the wheeled chassis controller via the emergency stop relay. The chassis controller sends a braking command to the service brake and parking brake modules to perform the braking operation. At the same time, the emergency stop signal is sent to the manual switch of the parking brake via the emergency stop relay to perform the braking operation. Another emergency stop signal is transmitted to the IG signal line of the 48V power battery via the emergency stop relay, changing it from a connection state to an open circuit state. At the same time, the 12V power supply is switched from the 12V output of the DCDC to the 12V output of the 12V backup battery to power the chassis controller, the service brake and the parking brake modules.

[0020] Preferably, the autonomous charging control system for the 48V power battery and 12V backup battery includes a charging relay and a body control module, which controls the external power supply to automatically charge the 48V power battery through the charging relay and the body control module, and controls the 48V power battery to charge the 12V backup battery through the chassis controller, the charging relay and the body control module.

[0021] Preferably, controlling the external power supply to automatically charge the 48V power battery through the charging relay and the body control module includes:

[0022] After the 48V power battery is connected to the external power supply, it communicates with the body control module through the CAN bus. After handshake confirmation, the charging relay is energized and the external power supply starts to charge the 48V power battery.

[0023] When the body control module detects that the battery charge has reached the set voltage value and confirms that the 48V power battery is fully charged, the body control module sends a charging disconnect command to the charging relay, the charging relay opens, and automatic charging is turned off.

[0024] Preferably, controlling the 48V power battery to charge the 12V backup battery through the chassis controller, the charging relay and the body control module includes:

[0025] When the 12V backup battery voltage is detected to be lower than 11.78V, the chassis controller sends a discharge command to the body control module through the CAN bus, and at the same time sends a pull-in command to the relay of the 12V backup battery charger, and the 48V power battery starts to charge the 12V backup battery;

[0026] When it is detected that the 12V battery voltage is higher than 13.4V, the smart box sends a stop charging instruction to the chassis controller through the CAN bus. The chassis controller controls the body control module to end the discharge and simultaneously turns on the relay of the 12V backup battery charger, and the charging ends.

[0027] Through the above technical scheme, the redundant electrical control of the wheeled chassis safety can be improved, the braking and parking functions of the whole vehicle under special circumstances can be realized, and the safety performance of the vehicle can be ensured; the intelligent control box of the power supply system can be automatically switched for the braking application of the wheeled platform to ensure the safety performance of the whole vehicle; it can be used for the rapid emergency stop of the wheeled platform to realize the emergency stop of the whole vehicle under special conditions; it can be used for the autonomous charging control of the unmanned wheeled platform to realize the autonomous charging of the unmanned vehicle. In other words, the present invention can improve the safety performance of the chassis electrical functions and the intelligent degree of electrical control, and effectively improve the overall safe use performance and intelligent functions of the wheeled chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of a smart box with a safety assistance system according to an embodiment of the present invention is shown;

[0030] Figure 2 A schematic diagram of a driving and parking brake power supply and control management system according to an embodiment of the present invention is shown;

[0031] Figure 3 A schematic diagram of a 48V power and DC-DC output 12V / 24V power distribution management system according to an embodiment of the present invention is shown;

[0032] Figure 4 A schematic diagram of an intelligently triggered emergency stop and manually triggered emergency stop management system according to an embodiment of the present invention is shown;

[0033] Figure 5 A schematic diagram of a 48V power battery and a 12V backup battery autonomous charging management system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] Figure 1 A schematic diagram of a smart box with a safety assistance system according to an embodiment of the present invention is shown.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a smart box with a safety assistance system, wherein the smart box includes a safety assistance system, the safety assistance system includes a driving and parking brake power supply and control management system, a 48V power and DC-DC output 12V / 24V power distribution management system, an intelligent trigger emergency stop and manual trigger emergency stop management system, and a 48V power battery and 12V backup battery autonomous charging management system, wherein,

[0039] The service and parking brake power supply and control management system is used to switch between the 48V power battery and the 12V backup battery to power the service and parking brakes and to control the service and parking brakes;

[0040] The 48V power battery and DC-DC output 12V / 24V power distribution management system are used to control the 12V and 24V outputs of the DC-DC. The 48V power battery and 12V backup battery are connected in parallel with the chassis master controller, service brake and parking brake controllers;

[0041] The intelligent trigger emergency stop and manual trigger emergency stop management system is used to intelligently trigger emergency stop or manually trigger emergency stop in emergency situations;

[0042] The 48V power battery and 12V backup battery autonomous charging management system is used to control the charging of the 48V power battery and 12V backup battery.

[0043] Through the above technical scheme, the redundant electrical control of the wheeled chassis safety can be improved, the braking and parking functions of the whole vehicle under special circumstances can be realized, and the safety performance of the vehicle can be ensured; the intelligent control box of the power supply system can be automatically switched for the braking application of the wheeled platform to ensure the safety performance of the whole vehicle; it can be used for the rapid emergency stop of the wheeled platform to realize the emergency stop of the whole vehicle under special conditions; it can be used for the autonomous charging control of the unmanned wheeled platform to realize the autonomous charging of the unmanned vehicle. That is, the present invention has stable climbing safety, precise and rapid flat ground emergency stop function, real-time stable braking function, and autonomous charging function of intelligent communication, which can improve the safety performance of the chassis electrical function and the intelligent degree of electrical control, and effectively improve the overall safe use performance and intelligent function of the wheeled chassis.

[0044] According to one embodiment of the present invention, a 48V power electricity and DC-DC output 12V / 24V power distribution management system includes a first MOSFET chip and a second MOSFET chip, a 12V backup battery is connected to the first MOSFET chip, and the 48V power battery is connected to the second MOSFET chip via a DC-DC 12V power supply. The first MOSFET chip is used to control the 48V power battery to output 12V, and the second MOSFET chip is used to control the 12V backup battery to output 12V. The first MOSFET chip and the second MOSFET chip realize switching between the 48V power battery output 12V and the 12V backup battery output 12V according to the potential change of the pin.

[0045] According to one embodiment of the present invention, the power battery and auxiliary battery intelligent control system includes a power management chip, a first power switch control chip and a second power switch control chip. The first power switch control chip is used to delay timing, and the second power switch control chip is used to control the power supply in a timing manner. The 24V output of DCDC is controlled by FLAG1 of the second power switch control chip, and the 12V output of DCDC is controlled by FLAG2 of the second power switch control chip. The digital isolator is entered through FLAG3 of the second power switch control chip to prevent overcharging of the 48V power battery. The power management chip is used to prevent the 48V power battery from charging the 12V backup battery.

[0046] According to one embodiment of the present invention, the intelligently triggered emergency stop and manually triggered emergency stop management system includes an emergency stop relay and an operation terminal. An emergency stop signal emitted by the operation terminal is sent to the wheeled chassis controller via the emergency stop relay. The chassis controller sends a braking command to the service brake and parking brake modules to perform the braking operation. At the same time, the emergency stop signal is sent to the manual switch of the parking brake via the emergency stop relay to perform the braking operation. Another emergency stop signal is transmitted to the IG signal line of the 48V power battery via the emergency stop relay, changing it from a connection state to an open circuit state. At the same time, the supply of 12V power is switched from the 12V output of the DCDC to the 12V output of the 12V backup battery to power the chassis controller, the service brake and the parking brake modules.

[0047] The operation terminal may be a remote controller. Alternatively, an emergency stop button may be used to send an emergency stop signal.

[0048] According to one embodiment of the present invention, a 48V power battery and a 12V backup battery autonomous charging control system includes a charging relay and a body control module, which control an external power supply to automatically charge the 48V power battery through the charging relay and the body control module, and control the 48V power battery to charge the 12V backup battery through the chassis controller, the charging relay and the body control module.

[0049] According to an embodiment of the present invention, controlling an external power supply to automatically charge a 48V power battery through a charging relay and a body control module includes:

[0050] After the 48V power battery is connected to the external power supply, it communicates with the body control module through the CAN bus. After handshake confirmation, the charging relay is energized and the external power supply starts to charge the 48V power battery.

[0051] When the body control module detects that the battery charge has reached the set voltage value and confirms that the 48V power battery is fully charged, the body control module sends a charging disconnect command to the charging relay, the charging relay opens, and automatic charging is turned off.

[0052] According to an embodiment of the present invention, controlling the 48V power battery to charge the 12V backup battery through the chassis controller, the charging relay and the body control module includes:

[0053] When the 12V backup battery voltage is detected to be lower than 11.78V, the chassis controller sends a discharge command to the body control module through the CAN bus, and at the same time sends a pull-in command to the relay of the 12V backup battery charger, and the 48V power battery starts to charge the 12V backup battery;

[0054] When it is detected that the 12V battery voltage is higher than 13.4V, the smart box sends a stop charging instruction to the chassis controller through the CAN bus. The chassis controller controls the body control module to end the discharge and simultaneously turns on the relay of the 12V backup battery charger, and the charging ends.

[0055] The smart box with a safety assistance system according to the present invention is described below with reference to examples.

[0056] The chassis safety assistance system intelligent box is divided into 4 subsystems: driving and parking brake power supply and control management system, 48V power electricity and DC-DC output 12V / 24V power distribution management system, intelligent trigger emergency stop and manual trigger emergency stop management system, 48V power battery and 12V backup battery autonomous charging management system.

[0057] Among them: (1) The driving and parking brake power supply and control management system is mainly designed with safe power redundancy design. When the vehicle is overloaded when climbing a slope or passing an obstacle, the 48V power battery will lose power, causing the DC-DC output 12V to lose power. The 12V power loss will cause the vehicle's braking system and parking system to fail, and the vehicle controller will lose power and fail. Based on the above considerations, immediately switching to the 12V backup battery power supply after the 48V power loss can ensure the braking and parking functions and ensure the safety performance of the vehicle. (2) The 48V power and DC-DC output 12V / 24V power distribution management system mainly consists of a 48V power battery, a 12V / 24V DC-DC power module, and a power output control chip. Among them, the 48V power battery can provide power for the 6 wheel hub motors, and provide isolated 12V / 24V power for all other loads through DC-DC. (3) The design of the intelligent trigger emergency stop and manual trigger emergency stop management system is based on the vehicle safety performance design. The emergency stop function is used to quickly cut off the output of the 48V power battery when the vehicle body is out of control, and immediately trigger the service brake to perform the braking function and the parking brake to perform the parking function. The input of the emergency stop function is defined as a dry node input. When the two contacts of NO are connected, the emergency stop mode is entered. The input device of the emergency stop can be a twistable mushroom head button (manual emergency stop) or a remote emergency stop (control terminal operation trigger). The emergency stop signal is sent to the input DI pin of the chassis controller. The chassis controller sends the execution braking command to the service brake module and the parking brake module, and the signal relay is also sent to the manual switch of the parking brake. At the same time, another emergency stop signal is transmitted to the key line of the 48V power lithium battery through the signal relay, changing it from the on state to the off state. At the same time, the electrical appliances connected to the 12V power supply are switched from DC-DC12V to 12V backup battery to power the chassis controller, service brake and parking brake. When the fault is eliminated, rotate the emergency stop button to restore the 48V power supply. (4) 48V power battery and 12V backup battery autonomous charging management system: mainly involves the autonomous charging confirmation of the wheeled platform chassis and the charging control of the 12V backup battery.

[0058] The following is a detailed description of the specific solutions for the design and application of the four subsystems:

[0059] Service and parking brake power supply and control management system

[0060] The present invention proposes an intelligent management system for a 12V power supply system output by a 48V power battery through a DCDC and a 12V power supply output by a 12V auxiliary battery. The present invention adopts a MOSFET chip for power distribution management, wherein a MOSFET chip 1 is used to control the output of 12V of the power supply, and a MOSFET chip 2 is used to control the output of 12V of the auxiliary battery. The two MOSFET management chips realize the output switching of the power supply 12V and the backup battery 12V according to the potential change of the 6th foot (definition: EN / UVLO), and the two coordinate with each other to perform switch management, intelligently manage the power output of the two power supply systems, ensure that one of the two power supply systems is always kept in a working state, keep the braking and parking functions effective at all times, and improve the safety performance of the wheeled platform.

[0061] The connection form of the start switch is in the form of a dry node (two-pole NO is connected) and is transmitted to the power supply BMS (body control module) and the auxiliary battery box in two ways; when the start switch is pressed, the 48V power battery works immediately, and the auxiliary battery box starts to detect the 12V output of DCDC after a delay of 3 seconds. When the voltage is detected to be lower than 11V, the normally closed contact in the DCDC circuit is cut off, and the positive electrode of the battery is connected to the 12V bus through PMOS, and the comparator result is latched at the same time. The latching is achieved by cutting off the voltage detection circuit, and at the same time, the 12V power supply after the 48V power battery DC-DC is switched to the 12V backup battery. For the block diagram of the driving and parking brake power supply and control management system, see Figure 2 shown.

[0062] The MOSFET chip used in the present invention can be used as a control chip or a power switch to provide redundant power through active or operation. The principle is an ideal diode controller, which can drive and control external back-to-back N-channel MOSFETs to simulate an ideal diode rectifier with power path on / off control and overvoltage protection. The wide input power supply voltage of 3V to 65V can protect and control control modules powered by 12V and 24V automotive batteries. The device can withstand and protect the load from negative power supply voltages as low as -65V. The integrated ideal diode controller (DGATE) can drive the first MOSFET to replace the Schottky diode to achieve reverse input protection and output voltage maintenance. When a second MOSFET is used in the power path, the device allows the load to be disconnected (on / off control) and provides overvoltage protection using HGATE control. The device has an adjustable overvoltage cutoff protection function.

[0063] 48V power and DC / DC output 12V / 24V power distribution management system

[0064] In the present invention, a power management chip and a power switch control chip are also added. The power switch control chip 1 is used to delay timing, and the power switch control chip 2 is used to control the power supply of the power supply. The output of the 24V power supply of DCDC is controlled by FLAG1 of the power switch control chip 2, the output of the 12V power supply of DCDC is controlled by FLAG2 of the power switch control chip 2, and the digital isolator is entered by FLAG3 of the power switch control chip 2 to prevent the charging of the 48V power battery from being overcharged. The power management chip prevents the 48V power electricity (12V electricity after the DCDC voltage is reduced) from charging the 12V auxiliary battery. The 48V power electricity (12V electricity after the DCDC voltage is reduced) and the 12V backup battery are connected in parallel with the chassis main control board and the driving and parking brake modules, which can effectively ensure that the 12V auxiliary battery can intervene in the power supply in time after the 48V power electricity is powered off, ensuring that the braking and parking functions are effective, and can stop the car in time.

[0065] The present invention utilizes the power-on and power-off functions of the three power output ports of the power switch chip, and controls them with the help of precise timing functions within a wide temperature range. This is particularly important when a reverse sequence is required during the power-off process, which occurs in many microprocessors and field programmable gate arrays (FPGAs). During power-on and power-off, it is necessary to control the DCDC (24V), DCDC (12V) and 48V autonomous charging of an FPGA in a time-sharing manner in the correct power-on sequence. When powering on: the power switch control chip 1 is used for timing, with every 2.2s as a timing cycle, and the power switch control chip 2 is used to control the power-on timing. After the entire vehicle is powered on, it will control the power supply outputs of FLAG1, FLAG2 and FLAG3 in turn; when powering off, the order is reversed, starting from FLAG3 and ending at FLAG1. This design method increases the service life of the terminal product with correct sequencing and improves product reliability. For 48V power and DC / DC output 12V / 24V power distribution management system, see Figure 3 shown.

[0066] Intelligent trigger emergency stop and manual trigger emergency stop management system

[0067] The safety auxiliary intelligent box is designed with intelligent trigger emergency stop and manual emergency stop management system, which is used for emergency stop and braking in emergencies and special test conditions. First, the input of the emergency stop function is defined as a dry node input. When the two contacts of NO are turned on, the emergency stop mode is entered. The input method of the emergency stop can be a twistable emergency stop button, and the emergency stop can also be triggered by the control terminal. The emergency stop signal is given to the input DI pin of the wheeled chassis controller through the emergency stop relay. The chassis controller sends a braking command to the driving brake and parking system, and the emergency stop relay is also given to the manual switch of the parking brake. At the same time, another emergency stop signal is transmitted to the IG signal line of the 48V power battery through the emergency stop relay, so that it changes from the on state to the off state. At the same time, the supply of 12V power is switched from DCDC12V to 12V backup battery to power the chassis controller, driving brake system and parking brake system. When the fault is eliminated, the emergency stop signal is rotated to restore the 48V power supply, but the 12V DCDC power supply can only be restored after the vehicle body returns to a safe flat state and the start switch is restarted. The electrical schematic diagram of the intelligent trigger and manual emergency stop system is shown in Figure 4 .

[0068] 48V power battery and 12V backup battery autonomous charging management system

[0069] The charging mode of the 48V power battery is automatic charging, and the 12V backup battery is charged by a portable charger. According to the application requirements of autonomous charging of the chassis of the unmanned vehicle, the present invention designs an autonomous charging confirmation and communication control mechanism inside the smart box. When automatically charging, after the vehicle body charging plug and the charging pile socket are connected, the CAN bus communicates with the 48V battery BMS. After handshake confirmation, the charging relay is energized to start charging the 48V power battery. There is only a 48V bus bar to the outside, and the current is intelligently controlled by the charging pile. During the charging process, the BCM will always monitor the battery power. When it is detected that the battery power reaches the set voltage value, it is confirmed that the 48V power battery is fully charged. At this time, the BCM sends a charging disconnection instruction to the charging relay, the charging relay is turned on, and the automatic charging is turned off. The 12V backup battery is charged through a 48V power battery via a 12V charger. When the voltage chip detects that the 12V backup battery voltage is lower than 11.78V, the chassis controller sends a discharge command to the BCM via the CAN bus, and at the same time sends a pull-in command to the relay of the 12V backup battery charger to start charging the 12V backup battery from the 48V power battery. After detecting that the 12V battery voltage exceeds 13.4V, the smart box sends a command to the chassis controller via the CAN bus. The chassis controller controls the BCM to end the discharge and simultaneously opens the relay of the 12V backup battery charger, and charging ends. For the principle architecture diagram of the 48V power battery and 12V backup battery autonomous charging control system, see Figure 5 shown.

[0070] It can be seen from the above embodiments that the smart box with a safety assistance system according to the present invention has at least the following advantages compared with the prior art:

[0071] 1. The present invention adopts a solution of coordinated application of two power supply systems: one set of 48V power battery and one set of 12V backup battery. When the power supply of the whole vehicle is cut off while climbing, the 12V backup battery can also be timely intervened to supply power, ensuring that the driving brake and parking brake of the whole vehicle can effectively stop, ensuring the safety of the test personnel and the safety performance of the vehicle body, and improving the safety level and quality of the product;

[0072] 2. The present invention adopts the unmanned autonomous charging function of the wheeled chassis, with bus control logic of CAN communication. After the charging connector is docked, the charging preparation confirmation begins. After the battery is fully charged, the BCM actively turns off the charging relay.

[0073] 3. The present invention adopts intelligent trigger emergency stop and manual emergency stop auxiliary system, which is used for emergency braking of the whole vehicle under special circumstances, ensuring the safety performance of the whole vehicle.

[0074] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A smart box with a safety assistance system, characterized in that: The smart box includes a safety assistance system, which includes a driving and parking brake power supply and control management system, a 48V power and DC-DC output 12V / 24V power distribution management system, an intelligent trigger emergency stop and manual trigger emergency stop management system, and a 48V power battery and 12V backup battery autonomous charging management system, among which, The service and parking brake power supply and control management system is used to switch between the 48V power battery and the 12V backup battery to power the service and parking brakes and to control the service and parking brakes; The 48V power battery and DC-DC output 12V / 24V power distribution management system are used to control the 12V and 24V outputs of the DC-DC. The 48V power battery and 12V backup battery are connected in parallel with the chassis master controller, service brake and parking brake controllers; The intelligent trigger emergency stop and manual trigger emergency stop management system is used to intelligently trigger emergency stop or manually trigger emergency stop in emergency situations; The 48V power battery and 12V backup battery autonomous charging management system is used to control the charging of the 48V power battery and 12V backup battery.

2. The smart box according to claim 1, characterized in that: The 48V power electricity and DC-DC output 12V / 24V power distribution management system includes a first MOSFET chip and a second MOSFET chip. The 12V backup battery is connected to the first MOSFET chip, and the 48V power battery is connected to the second MOSFET chip through a DC-DC 12V power supply. The first MOSFET chip is used to control the 48V power battery output 12V, and the second MOSFET chip is used to control the 12V backup battery output 12V. The first MOSFET chip and the second MOSFET chip realize switching between the 48V power battery output 12V and the 12V backup battery output 12V according to the potential change of the pin.

3. The smart box according to claim 2, characterized in that: The intelligent control system for power batteries and auxiliary batteries includes a power management chip, a first power switch control chip and a second power switch control chip. The first power switch control chip is used to delay timing, and the second power switch control chip is used to control the power supply in a timing manner. The 24V output of DCDC is controlled by FLAG1 of the second power switch control chip, and the 12V output of DCDC is controlled by FLAG2 of the second power switch control chip. FLAG3 of the second power switch control chip enters the digital isolator to prevent overcharging of the 48V power battery. The power management chip is used to prevent the 48V power battery from charging the 12V backup battery.

4. The smart box according to claim 3, characterized in that: The intelligent triggered emergency stop and manually triggered emergency stop management system includes an emergency stop relay and an operation terminal. The emergency stop signal sent by the operation terminal is sent to the wheeled chassis controller via the emergency stop relay. The chassis controller sends a braking command to the service brake and parking brake modules to perform the braking operation. At the same time, the emergency stop signal is sent to the manual switch of the parking brake via the emergency stop relay to perform the braking operation. The other emergency stop signal is transmitted to the IG signal line of the 48V power battery via the emergency stop relay, changing it from a closed state to an open state. At the same time, the 12V power supply is switched from the 12V output of the DCDC to the 12V output of the 12V backup battery to power the chassis controller, service brake and parking brake modules.

5. The smart box according to claim 4, characterized in that: The autonomous charging control system for the 48V power battery and 12V backup battery includes a charging relay and a body control module. The charging relay and the body control module control the external power supply to automatically charge the 48V power battery, and the chassis controller, charging relay and body control module control the 48V power battery to charge the 12V backup battery.

6. The smart box according to claim 5, characterized in that: Automatically charging the 48V power battery by controlling the external power supply through the charging relay and the body control module includes: After the 48V power battery is connected to the external power supply, it communicates with the body control module through the CAN bus. After handshake confirmation, the charging relay is energized and the external power supply starts to charge the 48V power battery. When the body control module detects that the battery charge has reached the set voltage value and confirms that the 48V power battery is fully charged, the body control module sends a charging disconnect command to the charging relay, the charging relay opens, and automatic charging is turned off.

7. The smart box according to claim 5, characterized in that: Controlling the 48V power battery to charge the 12V backup battery through the chassis controller, charging relay and body control module includes: When the 12V backup battery voltage is detected to be lower than 11.78V, the chassis controller sends a discharge command to the body control module through the CAN bus, and at the same time sends a pull-in command to the relay of the 12V backup battery charger, and the 48V power battery starts to charge the 12V backup battery; When it is detected that the 12V battery voltage is higher than 13.4V, the smart box sends a stop charging instruction to the chassis controller through the CAN bus. The chassis controller controls the body control module to end the discharge and simultaneously turns on the relay of the 12V backup battery charger, and the charging ends.

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