New energy vehicle power battery delay monitoring system and method, and new energy vehicle

Abstract

The invention relates to the field of vehicle power battery monitoring, and particularly discloses a new energy vehicle power battery delay monitoring system and method.When a vehicle control unit detects that a delay monitoring stage is entered, a high level is output through a fifth output end to control an electromagnetic switch to be switched on; and a corresponding wake-up output end outputs a low level to control the BMS wake-up electric relay and the Tbox wake-up electric relay to be switched on, so that the BMS controller and the Tbox controller are awakened to carry out delay monitoring on the power battery, and a fifth output end outputs a suspended level to control the electromagnetic switch to be switched off after the delay monitoring is carried out for a preset duration or the high voltage is detected to be switched on again. The delay monitoring device is simple and reliable in structure, when delay monitoring is needed, the monitoring controller is controlled and awakened through the electromagnetic switch and the relay, accurate and efficient control over the monitoring controller is achieved, and the delay monitoring reliability is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of vehicle power battery monitoring, and in particular to a new energy vehicle power battery delay monitoring system and method, and a new energy vehicle. Background Art

[0002] Since the power battery is an important source of power for pure electric vehicles and hybrid vehicles, and is one of the most important parts of a car, it is very necessary to monitor the battery status of an electric car. When the power battery is working, the status of the power battery can be sensed in real time. However, after charging and driving, due to electrochemical effects, although the power battery is not charged or outputting power to the outside, the battery is in an unstable state for a period of time, so it is necessary to perform delayed monitoring of the battery.

[0003] The existing technology realizes delayed monitoring of power batteries by sending a wake-up command to the BMS controller and sending power battery parameters and power battery fault information to the monitoring platform through Tbox. However, there is a lack of effective ways to automatically power and wake up the BMS controller and Tbox controller, so it is necessary to provide a power battery monitoring system to realize timely and effective wake-up of the monitoring controller. Summary of the invention

[0004] To solve the above problems, the present invention provides a new energy vehicle power battery delayed monitoring system and method, and a new energy vehicle, which can realize timely and effective awakening of the monitoring controller, and further realize delayed monitoring of the power battery.

[0005] In the first aspect, the technical solution of the present invention provides a new energy vehicle power battery delay monitoring system, including a lead-acid battery, an electromagnetic switch, a rocker switch, a wake-up relay group and a vehicle controller; The lead-acid battery is connected to the normal power distribution group via the electromagnetic switch; one end of the rocker switch is connected to the lead-acid battery, and the other end is connected to the high side of the coil of the electromagnetic switch, and the low side of the coil of the electromagnetic switch is grounded; the fifth output end of the vehicle controller is connected to the high side of the coil of the electromagnetic switch; The wake-up relay group includes a BMS wake-up electric relay and a Tbox wake-up electric relay. The contacts of the BMS wake-up electric relay and the Tbox wake-up electric relay are connected to the BMS controller and the Tbox controller respectively. The high side of the coil of each wake-up relay is connected to the normal power distribution group, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller. When the vehicle controller detects that it has entered the delayed monitoring stage, it outputs a high level through the fifth output terminal to control the closing of the electromagnetic switch, and outputs a low level through the corresponding wake-up output terminal to control the closing of the BMS wake-up relay and the Tbox wake-up relay, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring of the power battery, and after the preset delay monitoring time or when the high voltage is detected to be re-applied, the fifth output terminal outputs a floating level to control the electromagnetic switch to disconnect.

[0006] In an optional embodiment, the wake-up relay group further includes an all-in-one wake-up relay, the contacts of the all-in-one wake-up relay are connected to the all-in-one controller, the high side of the coil of the all-in-one wake-up relay is connected to the normal power distribution group, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller; The system also includes a charging wake-up relay and a charging wake-up distribution group; one end of the charging wake-up relay's contact is connected to a lead-acid battery, and the other end is connected to the charging wake-up distribution group; the low side of the coil of the charging wake-up relay is grounded, and the high side of the coil is powered by the charging pile through the charging gun; the charging wake-up distribution group includes at least two output powers, one of which is connected to the third input terminal of the vehicle controller, and the other is connected to the high side of the coil of the electromagnetic switch; when the charging gun is connected to the charging pile to wake up the charging, the charging wake-up distribution group is powered, and then drives the electromagnetic switch to close. At the same time, after the vehicle controller receives the charging wake-up signal from the third input terminal, it outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, the Tbox wake-up relay, and the multi-in-one wake-up relay to close, so as to wake up the BMS controller, the Tbox controller, and the multi-in-one controller to enter the preparatory charging stage.

[0007] In an optional embodiment, the fifth output terminal of the vehicle controller is connected to the high side of the coil of the electromagnetic switch through a diode, the charging wake-up distribution group is connected to the high side of the coil of the electromagnetic switch through a diode, and the charging wake-up distribution group is connected to the third input terminal of the vehicle controller through a diode.

[0008] In an optional embodiment, the wake-up relay group further includes an MCU wake-up relay, the contacts of the MCU wake-up relay are connected to the MCU controller, the high side of the coil of the MCU wake-up relay is connected to the normal power distribution group, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller; The system also includes a K15 relay and a vehicle-wide power distribution group; one end of the contact of the K15 relay is connected to the normal power distribution group, and the other end is connected to the vehicle-wide power distribution group; the low side of the coil of the K15 relay is grounded, and the high side of the coil receives the key ON position electricity; the vehicle-wide power distribution group includes an output circuit connected to the second input terminal of the vehicle controller; when driving normally, the K15 relay is closed, and the vehicle controller receives the vehicle-wide power-on signal through the second input terminal, and then outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up electric relay, Tbox wake-up electric relay, all-in-one wake-up relay, and MCU wake-up relay to close, so as to wake up the BMS controller, Tbox controller, all-in-one controller, and MCU controller to enter the preparatory driving stage.

[0009] In an optional implementation, the preset duration of delayed monitoring in the delayed monitoring phase is 1 hour.

[0010] In a second aspect, the technical solution of the present invention provides a method for monitoring a power battery delay of a new energy vehicle, characterized in that it comprises the following steps: Detect whether the vehicle enters the delayed monitoring stage; If so, the fifth output terminal outputs a high level to control the electromagnetic switch to close, and the corresponding wake-up output terminal outputs a low level to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring of the power battery; Real-time detection of whether high voltage is restored or the preset delay monitoring time is reached; If the high voltage is applied again or the preset delay monitoring time is reached, the electromagnetic switch is controlled to be disconnected through the fifth output terminal outputting a floating level.

[0011] In an optional implementation, it is detected whether the vehicle enters the delayed monitoring stage; if so, the electromagnetic switch is controlled to close by outputting a high level at the fifth output terminal, and the BMS wake-up electric relay and the Tbox wake-up electric relay are controlled to close by outputting a low level at the corresponding wake-up output terminal, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring on the power battery, specifically including: Detect whether high voltage conditions during charging or high voltage conditions during driving are received; If a high-voltage condition is received during charging, a high level is output through the fifth output terminal to control the electromagnetic switch to close; Detect whether the charging high voltage relay disconnection condition is received; If not received, continue to wait for the disconnection condition of the charging high-voltage relay; If received, a delay monitoring flag frame is sent to the timing flag and the countdown of the delay monitoring preset duration is started. At the same time, the corresponding wake-up output terminal outputs a low level to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delay monitoring on the power battery; If the high voltage condition under driving is received, the fifth output terminal outputs a high level to control the electromagnetic switch to close; Detect whether the main negative high voltage relay disconnection condition is received; If not received, continue to wait for the main negative high voltage relay disconnection condition; If received, a delay monitoring flag frame is sent to the timing flag and the countdown of the delay monitoring preset duration is started. At the same time, a low level is output through the corresponding wake-up output terminal to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delay monitoring on the power battery.

[0012] In an optional implementation, real-time detection of whether high voltage is applied again or the preset delay monitoring time is reached; if high voltage is applied again or the preset delay monitoring time is reached, the electromagnetic switch is disconnected by outputting a suspended level at the fifth output terminal, specifically including: Real-time detection of whether the vehicle power-on signal or charging wake-up signal is received; If the vehicle receives a full-vehicle power-on signal or a charging wake-up signal, it enters the low-voltage power-on stage. If there is a timing flag, the timing will continue. If there is no timing flag, there is no need to count. Check again whether there is a charging wake-up signal and a charging connection signal; If there is a charging wake-up signal and a charging connection signal, the charging high-voltage stage is entered, and the charging high-voltage condition is met. The timing flag is cleared, the timing ends, and the high level is stopped from being sent to the high side of the coil of the electromagnetic switch. If there is no charging wake-up signal and charging connection signal, then check whether there is a vehicle start signal; If there is no vehicle start signal, continue to detect whether there is a charging wake-up signal and a charging connection signal; If there is a vehicle start signal, the driving high voltage stage is entered, and the driving high voltage condition is met, the timing flag is cleared, the timing ends, and the high level is stopped from being sent to the high side of the coil of the electromagnetic switch; If the vehicle power-on signal or charging wake-up signal is not received, the timer delay monitoring will stop sending a low level to the BMS wake-up relay and the Tbox wake-up relay after the preset time, and stop sending a high level to the high side of the coil of the electromagnetic switch, so that the electromagnetic switch remains disconnected.

[0013] In an optional implementation, after entering the low voltage power-on stage, the following steps are further included: Check whether it is charging wake-up on low voltage power; If the charging wake-up is low voltage, the charging wake-up distribution group is powered to drive the electromagnetic switch to close. At the same time, after the vehicle controller receives the charging wake-up signal from the third input terminal, it outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, Tbox wake-up relay, and all-in-one wake-up relay to close to wake up the BMS controller, Tbox controller, and all-in-one controller to enter the preparatory charging stage; If it is not low voltage when charging wakes up, check whether the whole vehicle is powered by low voltage; If the whole vehicle is powered on with low voltage, the vehicle controller responds to the whole vehicle power-on signal, and outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, Tbox wake-up relay, all-in-one wake-up relay, and MCU wake-up relay to close to wake up the BMS controller, Tbox controller, all-in-one controller, and MCU controller to enter the preparatory driving stage; If the entire vehicle is not powered on with low voltage electricity, re-determine whether it is charging to wake up the low voltage electricity.

[0014] In a third aspect, the technical solution of the present invention provides a new energy vehicle equipped with any of the systems described above.

[0015] The invention provides a new energy vehicle power battery delayed monitoring system and method, and a new energy vehicle, which have the following beneficial effects compared to the prior art: a wake-up relay group is set, and when delayed monitoring is required, the vehicle controller controls the electromagnetic switch to close to connect to the normal power distribution group to provide power to the monitoring controller, and on the other hand, the monitoring controller is connected to the normal power distribution group to obtain power through the wake-up relay group, so as to realize the awakening of the monitoring controller and then realize delayed monitoring. The structure of the invention is simple and reliable. When delayed monitoring is required, the monitoring controller is awakened by the electromagnetic switch and relay control, so as to realize accurate and efficient control of the monitoring controller and ensure the reliability of delayed monitoring. At the same time, the delayed monitoring is terminated after the preset time of delayed monitoring or when the high voltage is detected to be re-applied. During this period, the multiple up and down of low voltage electricity has no effect on the delayed monitoring, so as to ensure the accurate implementation of delayed monitoring within a certain time after the high voltage is lowered, and it will not be interrupted due to other reasons. In addition, the function of charging without manually opening the rocker switch can be realized, and the electromagnetic switch is automatically turned off after charging is completed, so as not to cause the lead-acid battery to be fed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a new energy vehicle power battery delay monitoring system provided by an embodiment of the present invention.

[0018] Figure 2 It is a simplified functional diagram of a delayed monitoring system for a power battery of a new energy vehicle according to an embodiment of the present invention.

[0019] Figure 3 It is a flow chart of a method for delayed monitoring of a power battery of a new energy vehicle provided by an embodiment of the present invention.

[0020] Figure 4 The present invention is a flow chart of a specific embodiment of a method for delay monitoring of a power battery of a new energy vehicle.

[0021] Figure 5 It is a flowchart of the low-voltage power-on stage.

[0022] In the figure, 1-1, rocker switch, 1-2, electromagnetic switch, 1-3, normal power distribution group, 1-4, K15 relay, 1-5, vehicle power distribution group, 1-6, wake-up relay group, 1-7, vehicle controller, 1-8, charging wake-up distribution group, 1-9, charging wake-up relay, 1-10, lead-acid battery. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] Figure 1 Schematic diagram of a new energy vehicle power battery delay monitoring system provided by an embodiment of the present invention. Figure 1 As shown, the system includes a lead-acid battery 1-10, an electromagnetic switch 1-2, a rocker switch 1-1, a wake-up relay group 1-6 and a vehicle controller 1-7.

[0026] The lead-acid battery 1-10 is connected to the normal power distribution group 1-3 (30 power distribution group) via the electromagnetic switch 1-2; one end of the rocker switch 1-1 is connected to the lead-acid battery 1-10, and the other end is connected to the high side of the coil of the electromagnetic switch 1-2, and the low side of the coil of the electromagnetic switch 1-2 is grounded; the fifth output end of the vehicle controller 1-7 is connected to the high side of the coil of the electromagnetic switch 1-2.

[0027] The wake-up relay group 1-6 includes multiple wake-up relays, and the contacts of each wake-up relay are connected to the corresponding controller. The high side of the coil of each wake-up relay is connected to the normal power distribution group 1-3, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller 1-7. In this embodiment, the wake-up relay 1-6 includes a BMS wake-up electric relay, a Tbox wake-up electric relay, an all-in-one wake-up electric relay, and an MCU wake-up electric relay, and the coil low-side wake-up electricity (low level) is obtained from pins 6, 7, 8, and 9 of the vehicle controller 1-7 respectively. The contacts of the BMS wake-up electric relay, the Tbox wake-up electric relay, the all-in-one wake-up electric relay, and the MCU wake-up electric relay are respectively connected to the BMS controller, the Tbox controller, the all-in-one controller, and the MCU controller. Among them, the BMS controller and the Tbox controller are monitoring controllers of the power battery. When the BMS controller and the Tbox controller are awakened, the BMS will continuously send the status of the power battery, and the Tbox will also continuously upload the power battery information to the platform. It should be noted that the BMS collects the information of the power battery and sends the information of the power battery to the CAN bus, and the TBOX uploads the corresponding battery information to the platform to realize monitoring. It should also be noted that the lead-acid battery 1-10 is the source of low-voltage electricity, and the power battery is the source of high-voltage electricity. The purpose of this embodiment is to monitor the high-voltage battery by using the electric wake-up controller of the low-voltage lead-acid battery through power distribution.

[0028] When the vehicle controller 1-7 detects that it has entered the delayed monitoring stage, it outputs a high level through the fifth output terminal (pin 5) to control the electromagnetic switch 1-2 to close, and outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring of the power battery, and after the preset delay monitoring time or when the high voltage is detected to be re-applied, the fifth output terminal (pin 5) outputs a floating level to control the electromagnetic switch 1-2 to open.

[0029] Specifically, after the high voltage is applied, the delayed monitoring phase begins. At this time, the vehicle controller 1-7 sends a high level to the high side of the coil of the electromagnetic switch 1-2 through pin 5, driving the electromagnetic switch 1-2 to close, and then the 30-electricity distribution group is powered. At the same time, a low level is output through pins 6 and 7 to close the BMS wake-up relay and the Tbox wake-up relay, and the BMS controller and the Tbox controller are awakened, and the power battery can be delayed monitored.

[0030] This embodiment can also realize battery monitoring during the charging process, including a charging wake-up relay 1-9 and a charging wake-up distribution group 1-8. One end of the contact of the charging wake-up relay 1-9 is connected to the lead-acid battery 1-10, and the other end is connected to the charging wake-up distribution group 1-8; the low side of the coil of the charging wake-up relay 1-9 is grounded, and the high side of the coil is powered by the charging pile through the charging gun; the charging wake-up distribution group 1-8 includes at least two outputs, one of which is connected to the third input terminal (pin 3) of the vehicle controller 1-7, and the other is connected to the high side of the coil of the electromagnetic switch 1-2; when the charging gun is connected to the charging pile to wake up the charging, the charging wake-up distribution group 1-8 is powered, and then the electromagnetic switch 1-2 is driven to close. At the same time, after the vehicle controller 1-7 receives the charging wake-up signal from the third input terminal, it outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up electric relay, the Tbox wake-up electric relay, and the multi-in-one wake-up relay to close, so as to wake up the BMS controller, the Tbox controller, and the multi-in-one controller to enter the preparatory charging stage. Of course, the BMS controller and Tbox controller are also awakened at this time. At this time, the BMS controller will output the status of the power battery system through the CAN line, and the Tbox controller will obtain this information and upload it to the platform. This embodiment can also realize battery monitoring during driving, including K15 relays 1-4 and vehicle-wide power distribution groups 1-5 (15 power distribution groups); one end of the contact of the K15 relay 1-4 is connected to the normal power distribution group 1-3, and the other end is connected to the vehicle-wide power distribution group 1-5; the low side of the coil of the K15 relay 1-4 is grounded, and the high side of the coil receives the key ON position electricity; the vehicle-wide power distribution group 1-5 includes an output electrical connection connected to the second input end (pin 2) of the vehicle controller 1-7; when driving normally, the K15 relay 1-4 is closed, and the vehicle controller 1-7 receives the vehicle-wide power-on signal (key on signal) through the second input end, and then outputs a low level through the corresponding wake-up output end to control the BMS wake-up electric relay, Tbox wake-up electric relay, all-in-one wake-up relay, and MCU wake-up relay to close, so as to wake up the BMS controller, Tbox controller, all-in-one controller, and MCU controller to enter the preparatory driving stage. Of course, the BMS controller and Tbox controller are also awakened at this time. At this time, the BMS controller will output the status of the power battery system, and the Tbox controller will obtain this information and upload it to the platform. Of course, if you want to enter the stage of high voltage during driving, the fourth input terminal of the vehicle controller 1-7 must receive the START signal from the key. After receiving the START signal, if there are no other faults that affect the high voltage during driving, the vehicle controller 1-7 will control the high voltage during driving. The power distribution unit includes electromagnetic switch 1-2, K15 relay 1-4, charging wake-up relay 1-9 wake-up relay group 1-6, as well as 30 power distribution group 1-3, 15 power distribution group 1-5 and charging wake-up distribution group 1-8.

[0031] The vehicle controller 1-7 receives the total battery power from pin 1, the key on power from pin 2, the charging wake-up power from pin 3, and the START power (vehicle start power) from pin 4, and distinguishes different states to achieve the purpose of controlling the wake-up power of the electromagnetic switch 1-2 from pin 5 and the coil power of each wake-up relay from pins 6 to 9.

[0032] Electromagnetic switch 1-2 has three sources of control power, namely rocker switch 1-1 power, charging wake-up electromagnetic switch 1-2 power of charging distribution group, and electromagnetic switch 1-2 wake-up power of pin 5 of vehicle controller 1-7. Of course, in order to prevent cross-current, diodes are added to the charging wake-up electromagnetic switch 1-2 power and the output of electromagnetic switch 1-2 wake-up power of pin 5 of vehicle controller 1-7; when electromagnetic switch 1-2 is closed, 30 power distribution group 1-3 is powered. 30 power distribution groups 1-3 are energized: that is, the BMS controller 30 is energized, that is, the BMS controller is always energized, and the BMS controller enters the wake-up stage; that is, the all-in-one controller 30 is energized, that is, the all-in-one controller is always energized, and the all-in-one controller enters the wake-up stage; that is, the MCU controller 30 is energized, that is, the MCU controller is always energized, and the MCU controller enters the wake-up stage; that is, the relay coil high control is energized, and the wake-up relays of each controller enter the wake-up stage; that is, the Tbox controller 30 is energized, that is, the Tbox controller is always energized, and the Tbox controller enters the wake-up stage.

[0033] When the vehicle is in normal driving, in principle, the source of power supplied by the closed electromagnetic switch 1-2 is the power of the electromagnetic switch 1-2 rocker switch 1-1, which is a very reliable source of power. It does not come from the controller, relays and other devices, but is directly drawn from the main power supply, which is the most reliable. When charging is in normal use, in principle, the source of power supplied by the closed electromagnetic switch 1-2 is from one of the power supplies of the charging wake-up distribution group 1-8. When delay monitoring is performed, in principle, the source of power supplied by the closed electromagnetic switch 1-2 is from the wake-up power of the electromagnetic switch 1-2 at pin 5 of the vehicle controller 1-7.

[0034] K15 relay 1-4 is the total power source of 15 power distribution group. The high side of the coil of K15 relay 1-4 comes from the power of key K15 ON position. When the key is turned to the power of key K15 ON position, the high side of the coil of K15 relay 1-4 is energized, and K15 relay 1-4 is energized. At this time, K15 distribution group is energized. Charging wake-up relay 1-9 is a wide voltage relay and is the total power source of charging wake-up distribution group 1-8. The high side of the coil of charging wake-up relay 1-9 comes from the charging wake-up power (both 12V and 24V) obtained from the charging pile through the charging gun. When the charging gun and the charging seat are plugged in, the card swiping or VIN charging operation is completed, the charging wake-up power is supplied to the high side of the coil of charging wake-up relay 1-9. At this time, the coil of charging wake-up relay 1-9 is energized. At this time, the charging wake-up relay 1-9 is closed, and the charging wake-up distribution group 1-8 is energized.

[0035] When driving normally, K15 relay 1-4 is energized, and vehicle controller 1-7 receives vehicle controller 15 power from 15 power distribution group. At this time, the BMS relay coil controlled by vehicle controller 1-7 at pin 6 is set low, the Tbox relay coil controlled by vehicle controller 1-7 at pin 7 is set low, the multi-in-one relay coil controlled by vehicle controller 1-7 at pin 8 is set low, and the MCU relay coil controlled by vehicle controller 1-7 at pin 9 is set low; accordingly, the BMS wake-up relay, Tbox wake-up relay, multi-in-one wake-up relay and MCU wake-up relay respectively obtain the coil low-side power, and the coil high-side power comes from 30 power distribution group, which is normally powered after electromagnetic switch 1-2. At this time, the BMS wake-up relay, Tbox wake-up relay, multi-in-one wake-up relay and MCU wake-up relay respectively output wake-up power to their respective controllers for wake-up.

[0036] During normal charging, the charging wake-up relay 1-9 is energized, and the vehicle controller 1-7 receives the charging wake-up power of the vehicle controller 1-7 from the charging wake-up distribution group 1-8. At this time, the BMS relay coil controlled by the vehicle controller 1-7 at pin 6 is set low, the Tbox relay coil controlled by the vehicle controller 1-7 at pin 7 is set low, and the multi-in-one relay coil controlled by the vehicle controller 1-7 at pin 8 is set low; accordingly, the BMS wake-up power relay, the Tbox wake-up power relay, and the multi-in-one wake-up power relay respectively obtain the coil low-side power, and the coil high-side power comes from the 30 power distribution group, which is normally powered after the electromagnetic switch 1-2. At this time, the BMS wake-up power relay, the Tbox wake-up power relay, and the multi-in-one wake-up power relay respectively output the wake-up power to their respective controllers for wake-up.

[0037] When in delayed monitoring, the vehicle controller 1-7 has an internal flag for delayed monitoring. When delayed monitoring starts, the BMS relay coil at pin 6 of the vehicle controller 1-7 is set to low, and the Tbox relay coil at pin 7 of the vehicle controller 1-7 is set to low; accordingly, the BMS wake-up relay and the Tbox wake-up relay obtain the coil low-side power, and the coil high-side power comes from the 30-power distribution group, which is normally powered after the electromagnetic switch 1-2. At this time, the BMS wake-up relay and the Tbox wake-up relay output the wake-up power respectively to their respective controllers for wake-up.

[0038] Figure 2This is a simplified functional diagram of the delayed monitoring system of the new energy vehicle power battery 1-10 in this embodiment. When the high voltage is turned off during driving and the high voltage is turned off during charging, the delayed monitoring state can be entered, and the delay is 1 hour. During this period, the low voltage is turned on or off again many times, and the delayed monitoring continues. Once the high voltage is turned on, the delayed monitoring is broken, and the high voltage is turned off again, and the delayed monitoring is turned on again; and at this time, the purpose of charging can be achieved without turning on the rocker switch 1-1. After charging is completed, the power is naturally turned off, and the electromagnetic switch 1-2 is disconnected. There is no need to worry about the end of vehicle charging, and the electromagnetic switch 1-2 is still on, realizing worry-free charging.

[0039] If you want to be in the low-voltage stage while driving, you need to close the rocker solenoid switch 1-2 and turn the key to the KEY ON state.

[0040] If you want to enter the stage of charging low voltage, just plug the charging gun and the charging base together, and after swiping the card or VIN charging operation is completed, if everything is normal with the vehicle, it will be in the state of charging low voltage.

[0041] If it is in the delayed monitoring low voltage state, at this time as long as it is in the delayed monitoring state, and there is no charging wake-up and KEY ON is unscrewed, if the vehicle is normal at this time, it will be in the delayed monitoring low voltage state.

[0042] If the vehicle wants to be in the high-pressure driving state, it is in the low-pressure driving state at this time. At this time, turn off the START key and you can enter the high-pressure driving stage.

[0043] If the vehicle wants to be in the high-voltage state for charging, it is in the low-voltage state for charging. If the charging process is normal, it can enter the high-voltage stage for driving.

[0044] Based on the new energy vehicle power battery delay monitoring system described in the above embodiment, an embodiment of the present invention also provides a new energy vehicle power battery delay monitoring method corresponding to the system.

[0045] Figure 3 : is a schematic flow chart of a method for delay monitoring of a lead-acid battery of a new energy vehicle provided by an embodiment of the present invention, such as Figure 3 As shown, the method includes the following steps.

[0046] S1, detect whether the vehicle enters the delayed monitoring stage.

[0047] S2, if so, the fifth output terminal outputs a high level to control the electromagnetic switch 1-2 to close, and the corresponding wake-up output terminal outputs a low level to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring of the power battery 1-10.

[0048] S3, real-time detection of whether the high voltage is restored or the delay monitoring preset time is reached.

[0049] S4, if the high voltage is restored or the preset delay monitoring time is reached, the electromagnetic switch 1-2 is disconnected by outputting a low level through the fifth output terminal.

[0050] Based on the function of the new energy vehicle power battery delay monitoring system, a specific embodiment is provided below to explain in detail the new energy vehicle power battery delay monitoring method. Figure 4 It is a schematic diagram of the flow chart of this specific embodiment.

[0051] SS1, real-time detection of whether the vehicle power-on signal or charging wake-up signal is received, if so, execute step SS2, otherwise continue to execute step SS1.

[0052] SS2, enters the low-voltage power-on stage. If there is a timing flag, the timing will continue. If there is no timing flag, there is no need to count.

[0053] At the beginning, the vehicle controller 1-7 detects whether there is a KEY ON signal or a charging wake-up signal. When any of the signals is present, the low-voltage power-on stage is entered. If there is a delayed power-off timing flag, the timing is continued. If there is no timing flag, no timing is required.

[0054] SS3, check again whether there is a charging wake-up signal and a charging connection signal, if so, execute step SS4, otherwise execute step SS8.

[0055] SS4, enters the high-voltage charging stage, meets the high-voltage charging conditions, clears the timing flag, ends the timing, and stops sending a high level to the high side of the coil of the electromagnetic switch 1-2.

[0056] At this time, it is determined again whether there is a charging wake-up signal and a charging connection signal. If so, the charging high-voltage stage is entered; at this time, the charging high-voltage condition is met, and the delay is cleared regardless of whether there is a delay. At this time, the timing ends, and the vehicle controller 1-7 stops sending the high side of the electromagnetic switch 1-2 coil (regardless of whether it exists or not).

[0057] When the high voltage condition under charging is not received, the existing state is maintained.

[0058] SS5, detect whether the high voltage condition under charging is received, if so, execute step SS6, otherwise continue to execute step SS5.

[0059] SS6, controls the electromagnetic switch 1-2 to close by outputting a high level through the fifth output terminal.

[0060] SS7, detect whether the charging high-voltage relay disconnection condition is received, if so, execute step SS13, otherwise continue to execute step SS7.

[0061] SS8, detect whether there is a vehicle start signal, if so, execute step SS9, otherwise return to step SS3.

[0062] SS9, enters the high-voltage stage of driving, meets the high-voltage conditions of driving, clears the timing flag, ends the timing, and stops sending a high level to the high side of the coil of the electromagnetic switch 1-2.

[0063] If there is a START signal, the driving high-voltage stage is entered. At this time, the high-voltage conditions for driving are met. Regardless of whether there is a delay, the delay is cleared. At this time, the timing ends and the vehicle controller 1-7 stops sending the high side of the electromagnetic switch 1-2 coil (regardless of whether it exists or not).

[0064] When the high pressure condition is not received during driving, the current state is maintained.

[0065] SS10, detects whether the high pressure condition under driving is received, if so, executes step SS11, otherwise, continues to execute SS10.

[0066] SS11, controls the electromagnetic switch 1-2 to close by outputting a high level through the fifth output terminal.

[0067] SS12, detect whether the main negative high-voltage relay disconnection condition is received, if so, execute step SS13, otherwise execute step SS12.

[0068] SS13, sends a delayed monitoring flag frame to the timing flag and starts counting down the preset delay monitoring duration. At the same time, each wake-up output terminal outputs a low level to control each wake-up relay to close, thereby waking up each monitoring controller to perform delayed monitoring on power batteries 1-10.

[0069] When the high-voltage condition for charging is received, the vehicle controller 1-7 sends the high side of the electromagnetic switch 1-2 to keep the electromagnetic switch 1-2 energized; then it determines whether the disconnection condition of the charging high-voltage relay is received. If not, it waits. If received, it sends a delayed monitoring flag frame to the timing flag and starts a countdown of 1h, and at the same time sends a wake-up message to the BMS and Tbox. Please ask the BMS to continue to send battery messages and the Tbox to receive them.

[0070] When the high-voltage condition is received during driving, the vehicle controller 1-7 sends the high side of the electromagnetic switch 1-2 to keep the electromagnetic switch 1-2 energized; then it determines whether the disconnection condition of the main negative high-voltage relay is received. If not, it waits. If received, it sends a delayed monitoring flag frame to the timing flag and starts a countdown of 1h, and at the same time gives the wake-up power to the BMS and Tbox. Please ask the BMS to continue to send battery messages and the Tbox to receive them.

[0071] SS14, in the delayed monitoring stage, detect whether the vehicle power-on signal or charging wake-up signal is received, if so, return to step SS1, otherwise execute step SS15.

[0072] SS15, after the timing delay monitoring preset time, stops sending low level to each wake-up relay, and stops sending high level to the high side of the coil of electromagnetic switch 1-2 to keep electromagnetic switch 1-2 disconnected.

[0073] During the delay monitoring period, it is determined whether a Keyon signal or a charging wake-up signal is received. If so, the fan returns to the initial state and re-enters the low-voltage power-on stage. If no Keyon signal or charging wake-up signal is received, the timing continues for 1h, the wake-up power is disconnected, and the power is disconnected for 30 seconds after the timing ends, and the high side of the electromagnetic switch 1-2 is sent to 0, so that the electromagnetic switch 1-2 remains disconnected, and then ends.

[0074] This embodiment also provides a low voltage power-on phase process. Figure 5 It is a schematic diagram of the low-voltage power-on stage process, which specifically includes the following steps.

[0075] Step 1, check whether it is charging wake-up on low voltage power, if so, go to step 2, otherwise go to step 3.

[0076] Step 2, the charging wake-up distribution group 1-8 is energized to drive the electromagnetic switch 1-2 to close, and at the same time, the vehicle controller 1-7 responds to the charging wake-up signal, and outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up electric relay, Tbox wake-up electric relay, and all-in-one wake-up relay to wake up the BMS controller, Tbox controller, and all-in-one controller to enter the preparatory charging stage.

[0077] Of course, the BMS controller and Tbox controller are also awakened at this time. At this time, the BMS controller will output the status of the power battery system through the CAN line, and the Tbox controller will obtain this information and upload it to the platform.

[0078] Step 3, check whether the whole vehicle is powered by low voltage electricity, if so, execute step 4, otherwise return to execute step 1.

[0079] Step 4, the vehicle controller 1-7 responds to the vehicle power-on signal, and outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, Tbox wake-up relay, all-in-one wake-up relay, and MCU wake-up relay to close to wake up the BMS controller, Tbox controller, all-in-one controller, and MCU controller to enter the preparatory driving stage.

[0080] Of course, the BMS controller and Tbox controller are also awakened at this time. At this time, the BMS controller will output the status of the power battery system, and the Tbox controller will obtain this information and upload it to the platform. Of course, if you want to enter the stage of high voltage during driving, the fourth input terminal of the vehicle controller must receive the START signal from the key. After receiving the START signal, if there are no other faults that affect the high voltage during driving, the vehicle controller will control the high voltage during driving.

[0081] At the beginning, determine whether it has entered the low-voltage power-on stage. If not, continue to wait; if yes, determine whether it is charging wake-up low-voltage power, if yes, accept the wake-up signal vehicle controller 1-7 low-voltage power: make the electromagnetic switch 1-2 energized, and wake up BMS and all-in-one and Tbox and other devices; if there is a timing flag, the timing continues, if there is no timing flag, no timing is needed, and then end; if not, determine whether it is KEY ON low-voltage power, if not, re-determine whether it is charging wake-up low-voltage power; if yes, accept the wake-up signal vehicle controller 1-7 low-voltage power: wake up BMS and all-in-one, MCU and Tbox and other devices, if there is a timing flag, the timing continues, if there is no timing flag, no timing is needed; then end.

[0082] The above disclosure is only a preferred embodiment of the present invention, but the present invention is not limited thereto. Any non-creative changes that can be thought of by a person skilled in the art, as well as several improvements and modifications made without departing from the principle of the present invention, should fall within the protection scope of the present invention.

Claims

1. A new energy vehicle power battery delay monitoring system, It is characterized in that Includes lead-acid battery, electromagnetic switch, rocker switch, wake-up relay group and vehicle controller; The lead-acid battery is connected to the normal power distribution group via the electromagnetic switch; one end of the rocker switch is connected to the lead-acid battery, and the other end is connected to the high side of the coil of the electromagnetic switch, and the low side of the coil of the electromagnetic switch is grounded; the fifth output end of the vehicle controller is connected to the high side of the coil of the electromagnetic switch; The wake-up relay group includes a BMS wake-up electric relay and a Tbox wake-up electric relay. The contacts of the BMS wake-up electric relay and the Tbox wake-up electric relay are respectively connected to the BMS controller and the Tbox controller. The high side of the coil of each wake-up relay is connected to the normal power distribution group, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller. When the vehicle controller detects that it has entered the delayed monitoring stage, it outputs a high level through the fifth output terminal to control the closing of the electromagnetic switch, and outputs a low level through the corresponding wake-up output terminal to control the closing of the BMS wake-up electric relay and the Tbox wake-up electric relay, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring of the power battery, and after the preset delay monitoring time or when the high voltage is detected to be re-applied, the fifth output terminal outputs a floating level to control the electromagnetic switch to disconnect.

2. The new energy vehicle power battery delay monitoring system according to claim 1, It is characterized in that The wake-up relay group further includes an all-in-one wake-up relay, the contacts of the all-in-one wake-up relay are connected to the all-in-one controller, the high side of the coil of the all-in-one wake-up relay is connected to the normal power distribution group, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller; The system also includes a charging wake-up relay and a charging wake-up distribution group; one end of the charging wake-up relay's contact is connected to a lead-acid battery, and the other end is connected to the charging wake-up distribution group; the low side of the coil of the charging wake-up relay is grounded, and the high side of the coil is powered by the charging pile through the charging gun; the charging wake-up distribution group includes at least two output powers, one of which is connected to the third input terminal of the vehicle controller, and the other is connected to the high side of the coil of the electromagnetic switch; when the charging gun is connected to the charging pile to wake up the charging, the charging wake-up distribution group is powered, and then drives the electromagnetic switch to close. At the same time, after the vehicle controller receives the charging wake-up signal from the third input terminal, it outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, the Tbox wake-up relay, and the multi-in-one wake-up relay to close, so as to wake up the BMS controller, the Tbox controller, and the multi-in-one controller to enter the preparatory charging stage.

3. The new energy vehicle power battery delay monitoring system according to claim 2, It is characterized in that The fifth output terminal of the vehicle controller is connected to the high side of the coil of the electromagnetic switch through a diode, the charging wake-up distribution group is connected to the high side of the coil of the electromagnetic switch through a diode, and the charging wake-up distribution group is connected to the third input terminal of the vehicle controller through a diode.

4. The new energy vehicle power battery delay monitoring system according to claim 3, It is characterized in that The wake-up relay group also includes an MCU wake-up relay, the contact of the MCU wake-up relay is connected to the MCU controller, the high side of the coil of the MCU wake-up relay is connected to the normal power distribution group, and the low side of the coil is connected to the corresponding wake-up output terminal of the vehicle controller; The system also includes a K15 relay and a vehicle-wide power distribution group; one end of the contact of the K15 relay is connected to the normal power distribution group, and the other end is connected to the vehicle-wide power distribution group; the low side of the coil of the K15 relay is grounded, and the high side of the coil receives the key ON position electricity; the vehicle-wide power distribution group includes an output circuit connected to the second input terminal of the vehicle controller; when driving normally, the K15 relay is closed, and the vehicle controller receives the vehicle-wide power-on signal through the second input terminal, and then outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up electric relay, Tbox wake-up electric relay, all-in-one wake-up relay, and MCU wake-up relay to close, so as to wake up the BMS controller, Tbox controller, all-in-one controller, and MCU controller to enter the preparatory driving stage.

5. The new energy vehicle power battery delay monitoring system according to any one of claims 1 to 4, It is characterized in that The preset duration of delayed monitoring in the delayed monitoring stage is 1 hour.

6. A delayed monitoring method for power batteries of new energy vehicles, It is characterized in that The following steps are involved: Detect whether the vehicle enters the delayed monitoring stage; If so, the fifth output terminal outputs a high level to control the electromagnetic switch to close, and the corresponding wake-up output terminal outputs a low level to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring of the power battery; Real-time detection of whether high voltage is restored or the preset delay monitoring time is reached; If the high voltage is applied again or the preset delay monitoring time is reached, the electromagnetic switch is controlled to be disconnected through the fifth output terminal outputting a floating level.

7. The method for monitoring the power battery delay of a new energy vehicle according to claim 6, It is characterized in that Detect whether the vehicle enters the delayed monitoring stage; if so, control the electromagnetic switch to close by outputting a high level at the fifth output terminal, and control the BMS wake-up relay and the Tbox wake-up relay to close by outputting a low level at the corresponding wake-up output terminal, thereby waking up the BMS controller and the Tbox controller to perform delayed monitoring on the power battery, specifically including: Detect whether high voltage conditions during charging or high voltage conditions during driving are received; If a high-voltage condition is received during charging, a high level is output through the fifth output terminal to control the electromagnetic switch to close; Detect whether the charging high voltage relay disconnection condition is received; If not received, continue to wait for the disconnection condition of the charging high-voltage relay; If received, a delay monitoring flag frame is sent to the timing flag and the countdown of the delay monitoring preset duration is started. At the same time, the corresponding wake-up output terminal outputs a low level to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delay monitoring on the lead-acid battery; If the high voltage condition under driving is received, the fifth output terminal outputs a high level to control the electromagnetic switch to close; Detect whether the main negative high voltage relay disconnection condition is received; If not received, continue to wait for the main negative high voltage relay disconnection condition; If received, a delay monitoring flag frame is sent to the timing flag and the countdown of the delay monitoring preset duration is started. At the same time, a low level is output through the corresponding wake-up output terminal to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby waking up the BMS controller and the Tbox controller to perform delay monitoring on the power battery.

8. The method for monitoring the power battery delay of a new energy vehicle according to claim 7, It is characterized in that Real-time detection of whether high voltage is restored or the preset delay monitoring time is reached; If the high voltage is applied again or the preset delay monitoring time is reached, the electromagnetic switch is disconnected by outputting a suspended level at the fifth output terminal, specifically including: Real-time detection of whether the vehicle power-on signal or charging wake-up signal is received; If the vehicle receives a full-vehicle power-on signal or a charging wake-up signal, it enters the low-voltage power-on stage. If there is a timing flag, the timing will continue. If there is no timing flag, there is no need to count. Check again whether there is a charging wake-up signal and a charging connection signal; If there is a charging wake-up signal and a charging connection signal, the charging high-voltage stage is entered, and the charging high-voltage condition is met. The timing flag is cleared, the timing ends, and the high level is stopped from being sent to the high side of the coil of the electromagnetic switch. If there is no charging wake-up signal and charging connection signal, then check whether there is a vehicle start signal; If there is no vehicle start signal, continue to detect whether there is a charging wake-up signal and a charging connection signal; If there is a vehicle start signal, the driving high voltage stage is entered, and the driving high voltage condition is met, the timing flag is cleared, the timing ends, and the high level is stopped from being sent to the high side of the coil of the electromagnetic switch; If the vehicle power-on signal or charging wake-up signal is not received, the timer delay monitoring will stop sending a low level to the BMS wake-up relay and the Tbox wake-up relay after the preset time, and stop sending a high level to the high side of the coil of the electromagnetic switch, so that the electromagnetic switch remains disconnected.

9. The method for monitoring the power battery delay of a new energy vehicle according to claim 8, It is characterized in that After entering the low-voltage power-on stage, the following steps are also included: Check whether it is charging wake-up on low voltage power; If the charging wake-up is low voltage, the charging wake-up distribution group is powered to drive the electromagnetic switch to close. At the same time, after the vehicle controller receives the charging wake-up signal from the third input terminal, it outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, Tbox wake-up relay, and all-in-one wake-up relay to close to wake up the BMS controller, Tbox controller, and all-in-one controller to enter the preparatory charging stage; If it is not low voltage when charging wakes up, check whether the whole vehicle is powered by low voltage; If the whole vehicle is powered on with low voltage, the vehicle controller responds to the whole vehicle power-on signal, and outputs a low level through the corresponding wake-up output terminal to control the BMS wake-up relay, Tbox wake-up relay, all-in-one wake-up relay, and MCU wake-up relay to close to wake up the BMS controller, Tbox controller, all-in-one controller, and MCU controller to enter the preparatory driving stage; If the entire vehicle is not powered on with low voltage electricity, re-determine whether it is charging to wake up the low voltage electricity.

10. A new energy vehicle, It is characterized in that A system according to any one of claims 1 to 5 is provided.

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