A new energy vehicle power battery delay monitoring system and method, and a new energy vehicle

Abstract

The application 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 controller 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 closed, and a low level is output through a corresponding wake-up output end to control a BMS wake-up electric relay and a Tbox wake-up electric relay to be closed, so that a BMS controller and a Tbox controller are woken up to delay monitor a power battery. After a preset time length of delay monitoring or when high voltage is detected again, a floating level is output through the fifth output end to control the electromagnetic switch to be opened. The application has a simple and reliable structure. When delay monitoring is needed, the electromagnetic switch and the relay are used to control a wake-up monitoring controller, accurate and efficient control of the monitoring controller is realized, and the reliability of delay monitoring is ensured.

Description

TECHNICAL FIELD

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

[0002] Since the power battery is an important power source of pure electric vehicles and hybrid electric vehicles, the power battery is one of the most important components on the automobile, so it is necessary to monitor the battery state of the electric vehicle. When the power battery is working, the state of the power battery can be perceived in real time, but after charging and driving are completed, the power battery is actually in an unstable state for a period of time due to electrochemical action, although the power battery is not charged or externally outputs power. Therefore, it is necessary to monitor the battery in a delay manner.

[0003] The prior art realizes delay monitoring of the power battery by sending a wake-up instruction to the BMS controller and sending the power battery parameters and power battery fault information to the monitoring platform through the Tbox. However, there is a lack of effective way to automatically power and wake up the BMS controller and the 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

[0004] To solve the above problems, the present application provides a new energy vehicle power battery delay monitoring system and method, and a new energy vehicle, which realizes timely and effective wake-up of the monitoring controller, and further realizes delay monitoring of the power battery.

[0005] In a first aspect, the technical book scheme of the present application provides a new energy vehicle power battery delay monitoring system, which comprises a lead-acid battery, an electromagnetic switch, a rocker switch, a wake-up relay group and a vehicle controller.

[0006] The lead-acid battery is connected to a constant power distribution group through 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. 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.

[0007] The wake-up relay group comprises 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 constant power distribution group, and the low side of the coil is connected to the corresponding wake-up output end of the vehicle controller.

[0008] When the vehicle controller detects that the delay monitoring phase is entered, a high level is output through the fifth output end to control the electromagnetic switch to close, and a low level is output through the corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to close, so as to wake up the BMS controller and the Tbox controller to monitor the power battery, and after a preset time length of delay monitoring or when it is detected that the high voltage is turned on again, a floating level is output through the fifth output end to control the electromagnetic switch to open.

[0009] In an optional embodiment, the wake-up relay group further comprises a multi-in-one wake-up relay, contacts of the multi-in-one wake-up relay are connected to the multi-in-one controller, a high side of a coil of the multi-in-one wake-up relay is connected to the constant power distribution group, and a low side of the coil is connected to the corresponding wake-up output end of the vehicle controller.

[0010] The system further comprises a charging wake-up relay and a charging wake-up power distribution group; one end of contacts of the charging wake-up relay is connected to the lead-acid battery, and the other end is connected to the charging wake-up power distribution group; a low side of a coil of the charging wake-up relay is grounded, and a high side of the coil is powered from the charging pile through the charging gun; the charging wake-up power distribution group comprises at least two output powers, one of which is connected to the third input end of the vehicle controller, and the other of which 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 charging, the charging wake-up power distribution group is powered, thereby driving the electromagnetic switch to close, and at the same time, after the vehicle controller receives the charging wake-up signal from the third input end, a low level is output through the corresponding wake-up output end 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 pre-charging phase.

[0011] In an optional embodiment, the fifth output end of the vehicle controller is connected to the high side of the coil of the electromagnetic switch through a diode, the charging wake-up power distribution group is connected to the high side of the coil of the electromagnetic switch through a diode, and the charging wake-up power distribution group is connected to the third input end of the vehicle controller through a diode.

[0012] In an optional embodiment, the wake-up relay group further comprises an MCU wake-up relay, contacts of the MCU wake-up relay are connected to the MCU controller, a high side of a coil of the MCU wake-up relay is connected to the constant power distribution group, and a low side of the coil is connected to the corresponding wake-up output end of the vehicle controller.

[0013] The system further comprises a K15 relay and a full-vehicle power distribution group; one end of the contact of the K15 relay is connected to the constant power distribution group, and the other end is connected to the full-vehicle 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 gear electricity; the full-vehicle power distribution group comprises one output electric connection input into the second input end of the vehicle controller; when normal driving, the K15 relay is closed, the full-vehicle power distribution signal is received by the vehicle controller through the second input end, and then the low level control BMS wake-up electric relay, Tbox wake-up electric relay, multi-in-one wake-up relay, and MCU wake-up relay are output through the corresponding wake-up output end to close, so as to wake up the BMS controller, Tbox controller, multi-in-one controller, and MCU controller to enter the preparatory driving stage.

[0014] In an optional embodiment, the preset time length of the delay monitoring stage is 1 hour.

[0015] In a second aspect, the technical scheme of the present application provides a new energy vehicle power battery delay monitoring method, characterized in that it comprises the following steps:

[0016] detecting whether the vehicle enters the delay monitoring stage;

[0017] if yes, outputting a high level through the fifth output end to control the electromagnetic switch to close, and outputting a low level through the corresponding wake-up output end to control the BMS wake-up electric relay and Tbox wake-up electric relay to close, so as to wake up the BMS controller and Tbox controller to perform delay monitoring on the power battery;

[0018] real-time detecting whether the high voltage is reconnected or the preset time length of the delay monitoring is reached;

[0019] if the high voltage is reconnected or the preset time length of the delay monitoring is reached, outputting a suspended level through the fifth output end to control the electromagnetic switch to open.

[0020] In an optional embodiment, detecting whether the vehicle enters the delay monitoring stage; if yes, outputting a high level through the fifth output end to control the electromagnetic switch to close, and outputting a low level through the corresponding wake-up output end to control the BMS wake-up electric relay and Tbox wake-up electric relay to close, so as to wake up the BMS controller and Tbox controller to perform delay monitoring on the power battery, specifically comprising:

[0021] detecting whether the charging low voltage condition or the driving low voltage condition is received;

[0022] if the charging low voltage condition is received, outputting a high level through the fifth output end to control the electromagnetic switch to close;

[0023] detecting whether the charging high voltage relay opening condition is received;

[0024] If not received, continue to wait for the charging high-voltage relay to be disconnected;

[0025] If received, send a delay monitoring flag frame to the timing flag bit and start a countdown delay monitoring preset time period, and simultaneously output a low level through the corresponding wake-up output end to control the BMS wake-up electrical relay and the Tbox wake-up electrical relay to be closed, thereby waking up the BMS controller and the Tbox controller to perform delay monitoring on the power battery;

[0026] If the driving high-voltage condition is received, output a high level through the fifth output end to control the electromagnetic switch to be closed;

[0027] Detect whether the main negative high-voltage relay is disconnected;

[0028] If not received, continue to wait for the main negative high-voltage relay to be disconnected;

[0029] If received, send a delay monitoring flag frame to the timing flag bit and start a countdown delay monitoring preset time period, and simultaneously output a low level through the corresponding wake-up output end to control the BMS wake-up electrical relay and the Tbox wake-up electrical relay to be closed, thereby waking up the BMS controller and the Tbox controller to perform delay monitoring on the power battery.

[0030] In an optional embodiment, whether the high voltage is reconnected or the delay monitoring preset time period is reached is detected in real time; if the high voltage is reconnected or the delay monitoring preset time period is reached, output a suspended level through the fifth output end to control the electromagnetic switch to be opened, specifically including:

[0031] Detect whether a full-vehicle power-on signal or a charging wake-up signal is received in real time;

[0032] If the full-vehicle power-on signal or the charging wake-up signal is received, enter the low-voltage power-on stage; at this time, if there is a timing flag bit, perform timing extension, and if there is no timing bit, timing is not required;

[0033] Detect whether there is a charging wake-up signal and a charging connection signal again;

[0034] If there is a charging wake-up signal and a charging connection signal, enter the charging high-voltage stage, meet the charging high-voltage connection condition, clear the timing flag bit, timing is completed, and stop sending a high level to the coil high side of the electromagnetic switch;

[0035] If there is no charging wake-up signal and charging connection signal, detect whether there is a vehicle start signal;

[0036] If there is no vehicle start signal, continuously detect whether there is a charging wake-up signal and a charging connection signal;

[0037] If there is a vehicle starting signal, enter the driving high voltage stage, meet the driving high voltage condition, clear the timing flag bit, timing ends, stop sending high level to the high side of the coil of the electromagnetic switch;

[0038] If no full vehicle power-on signal or charging wake-up signal is received, after the timing delay monitoring for a preset time period, stop sending low level to the BMS wake-up electric relay and the Tbox wake-up electric relay, and stop sending high level to the high side of the coil of the electromagnetic switch, so that the electromagnetic switch remains open.

[0039] In an optional embodiment, after entering the low-voltage power-on stage, the following steps are further included:

[0040] Detect whether it is a charging wake-up low voltage;

[0041] If it is a charging wake-up low voltage, the charging wake-up power distribution group is powered to drive the electromagnetic switch to close, and after the vehicle controller receives the charging wake-up signal from the third input end, it outputs low level through the corresponding wake-up output end to control the BMS wake-up electric relay, the Tbox wake-up electric relay, and the multi-combination wake-up relay to close to wake up the BMS controller, the Tbox controller, and the multi-combination controller to enter the pre-charging stage;

[0042] If it is not a charging wake-up low voltage, detect whether it is a full vehicle power-on low voltage;

[0043] If it is a full vehicle power-on low voltage, the vehicle controller responds to the full vehicle power-on signal and outputs low level through the corresponding wake-up output end to control the BMS wake-up electric relay, the Tbox wake-up electric relay, the multi-combination wake-up relay, and the MCU wake-up relay to close to wake up the BMS controller, the Tbox controller, the multi-combination controller, and the MCU controller to enter the pre-driving stage;

[0044] If it is not a full vehicle power-on low voltage, re-determine whether it is a charging wake-up low voltage.

[0045] In a third aspect, the technical solution of the present application provides a new energy vehicle configured with the system of any one of the above.

[0046] The application provides a new energy vehicle power battery delay monitoring system and method and a new energy vehicle, and has the following beneficial effects compared with the prior art: the wake-up relay group is arranged, when delay monitoring is needed, the vehicle controller controls the electromagnetic switch to be closed to connect the normal power distribution group to provide power supply for the monitoring controller, and the wake-up relay group is used to connect the monitoring controller to the normal power distribution group to obtain power, the wake-up of the monitoring controller is realized, and then the delay monitoring is realized. The application has the advantages of simple and reliable structure, when delay monitoring is needed, the electromagnetic switch and the relay are used to control the wake-up of the monitoring controller, accurate and efficient control of the monitoring controller is realized, and the reliability of the delay monitoring is ensured. Meanwhile, the delay monitoring is ended only after the preset time length or when high voltage is detected again, the delay monitoring is not affected by multiple high-low voltage switching, the accurate implementation of the delay monitoring within a certain time length after the high voltage is applied is ensured, and the delay monitoring is not 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 that the lead-acid battery power supply is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0048] Figure 1 It is a structure schematic diagram of a new energy vehicle power battery delay monitoring system provided by the embodiments of the application.

[0049] Figure 2 It is a simplified function schematic diagram of a new energy vehicle power battery delay monitoring system provided by the embodiments of the application.

[0050] Figure 3 It is a flowchart of a new energy vehicle power battery delay monitoring method provided by the embodiments of the application.

[0051] Figure 4 It is a flowchart of a specific embodiment of a new energy vehicle power battery delay monitoring method.

[0052] Figure 5 It is a flowchart of a low-voltage power-on stage.

[0053] In the figure, 1-1 is a rocker switch, 1-2 is an electromagnetic switch, 1-3 is a normal power distribution group, 1-4 is a K15 relay, 1-5 is a vehicle power distribution group, 1-6 is a wake-up relay group, 1-7 is a vehicle controller, 1-8 is a charging wake-up power distribution group, 1-9 is a charging wake-up relay, and 1-10 is a lead-acid battery. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0055] 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 this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0056] Figure 1 This is a schematic diagram of the structure 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.

[0057] The lead-acid battery 1-10 is connected to the normal power distribution group 1-3 (30 power distribution group) through 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.

[0058] The wake-up relay group 1-6 includes multiple wake-up relays, the contact of each wake-up relay is connected to a corresponding controller, the high side of the coil of each wake-up relay is connected to the constant power distribution group 1-3, and the low side of the coil is connected to the corresponding wake-up output end of the vehicle controller 1-7. In this embodiment, the wake-up relay 1-6 includes a BMS wake-up relay, a Tbox wake-up relay, a multi-in-one wake-up relay, and an MCU wake-up relay, which respectively obtain the low side wake-up electricity (low level) from the 6th pin, the 7th pin, the 8th pin, and the 9th pin of the vehicle controller 1-7. The contacts of the BMS wake-up relay, the Tbox wake-up relay, the multi-in-one wake-up relay, and the MCU wake-up relay are respectively connected to the BMS controller, the Tbox controller, the multi-in-one controller, and the MCU controller. Among them, the BMS controller and the Tbox controller are the monitoring controllers of the power battery, when the BMS controller and the Tbox controller are awakened, the BMS will continuously send the state of the power battery, and the Tbox will continuously upload the information of the power battery to the platform. It should be noted that the BMS collects the information of the power battery, 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. In addition, it should 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 realize the monitoring of the high-voltage battery by using the low-voltage lead-acid battery to wake up the controller.

[0059] When the vehicle controller 1-7 detects that it enters the delay monitoring stage, it outputs a high level through the fifth output end (the 5th pin) to control the electromagnetic switch 1-2 to close, and outputs a low level through the corresponding wake-up output end to control the BMS wake-up relay and the Tbox wake-up relay to close, thereby awakening the BMS controller and the Tbox controller to monitor the power battery in a delay manner, and after a preset time length of delay monitoring or when the high voltage is detected again, the vehicle controller 1-7 outputs a suspended level through the fifth output end (the 5th pin) to control the electromagnetic switch 1-2 to open.

[0060] Specifically, after the high voltage is lowered, the delay monitoring stage is entered, 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 the 5th pin to drive the electromagnetic switch 1-2 to close, and then the 30 power distribution group is powered on. At the same time, a low level is output through the 6th pin and the 7th pin to make the BMS wake-up relay and the Tbox wake-up relay close, and the BMS controller and the Tbox controller are awakened to monitor the power battery in a delay manner.

[0061] The embodiment can also realize battery monitoring during charging process, including charging wake-up relay 1-9 and charging wake-up power 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 power 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 from the charging pile through the charging gun; the charging wake-up power distribution group 1-8 includes at least two output powers, one of which is connected to the third input end (pin 3) of the vehicle controller 1-7, and the other of which 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 power distribution group 1-8 is powered, thereby driving the electromagnetic switch 1-2 to close, and at the same time, after the vehicle controller 1-7 receives the charging wake-up signal from the third input end, it outputs a low level through the corresponding wake-up output end 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 pre-charging stage. Of course, the BMS controller and the Tbox controller are also woken up at this time, and the BMS controller outputs the state of the power battery system through the CAN line at this time, and the Tbox controller acquires these information and uploads it to the platform

[0062] The embodiment can also realize battery monitoring during driving process, including K15 relay 1-4 and full vehicle power-on power distribution group 1-5 (15 power distribution group); one end of the contact of the K15 relay 1-4 is connected to the constant power distribution group 1-3, and the other end is connected to the full vehicle power-on 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 key ON gear power; the full vehicle power-on power distribution group 1-5 includes one output power connected to the second input end (pin 2) of the vehicle controller 1-7; when driving normally, the K15 relay 1-4 is closed, the vehicle controller 1-7 receives the full vehicle 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, the Tbox wake-up electric relay, the multi-in-one wake-up relay, and the MCU wake-up relay to close, so as to wake up the BMS controller, the Tbox controller, the multi-in-one controller, and the MCU controller to enter the pre-driving stage. Of course, the BMS controller and the Tbox controller are also woken up at this time, and the BMS controller outputs the state of the power battery system at this time, and the Tbox controller acquires these information and uploads it to the platform. Of course, if the vehicle enters the real driving high-voltage stage at this time, the fourth input end of the vehicle controller 1-7 receives the START signal from the key, receives the START signal, and has no other influence on the driving high-voltage fault, and the vehicle controller 1-7 will control the driving high-voltage

[0063] The power distribution unit includes an electromagnetic switch 1-2, a K15 relay 1-4, a charging wake-up relay 1-9, a wake-up relay group 1-6, and a 30 electric power distribution group 1-3, a 15 electric power distribution group 1-5, and a charging wake-up power distribution group 1-8.

[0064] The whole vehicle controller 1-7 receives the battery total power of the No. 1 pin, the key on power of the No. 2 pin, the charging wake-up power of the No. 3 pin, and the START power (vehicle starting power) of the No. 4 pin, respectively distinguishes different states, and achieves the purpose of controlling the electromagnetic switch 1-2 wake-up power of the No. 5 pin and the coil power of each wake-up relay of the No. 6-9 pin.

[0065] The electromagnetic switch 1-2 has three sources of control power, which are the rocker switch 1-1 power, the charging wake-up electromagnetic switch 1-2 power of the charging power distribution group, and the electromagnetic switch 1-2 wake-up power of the No. 5 pin of the whole vehicle controller 1-7. Of course, in order to prevent the power from being connected, diodes are added to the two circuits when the charging wake-up electromagnetic switch 1-2 power and the electromagnetic switch 1-2 wake-up power of the No. 5 pin of the whole vehicle controller 1-7 are output. When the electromagnetic switch 1-2 is closed, the 30 electric power distribution group 1-3 is powered. The 30 electric power distribution group 1-3 is powered: that is, the BMS controller 30 electric is powered, that is, the BMS controller normal power is powered, the BMS controller enters the wake-up standby stage; that is, the all-in-one controller 30 electric is powered, that is, the all-in-one controller normal power is powered, the all-in-one controller enters the wake-up standby stage; that is, the MCU controller 30 electric is powered, that is, the MCU controller normal power is powered, the MCU controller enters the wake-up standby stage; that is, the relay coil high control is powered, and each wake-up relay of the controller enters the wake-up standby stage; that is, the Tbox controller 30 electric is powered, that is, the Tbox controller normal power is powered, and the Tbox controller enters the wake-up standby stage.

[0066] When normally driving, in principle, the total power source for the electromagnetic switch 1-2 to be closed for power supply is the electromagnetic switch 1-2 rocker switch 1-1 power, which is a very reliable total power source, not from the controller, relay and other devices, but directly from the total power, which is the most reliable. When normally charging, in principle, the source of the electromagnetic switch 1-2 to be closed for power supply is one of the charging wake-up power distribution groups 1-8. When performing delay monitoring, in principle, the source of the electromagnetic switch 1-2 to be closed for power supply is the electromagnetic switch 1-2 wake-up power of the No. 5 pin of the whole vehicle controller 1-7.

[0067] K15 relay 1-4 is the total power source of 15 electric distribution group, the coil high side of K15 relay 1-4 comes from the key K15 ON electric, when the key is twisted to the key K15 ON electric, the coil high side of K15 relay 1-4 gets electricity at this time, K15 relay 1-4 is attracted at this time, K15 distribution group gets electricity. 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 coil high side of charging wake-up relay 1-9 comes from the charging wake-up electricity (12V / 24V) obtained from the charging pile through the charging gun, when the charging gun and the charging seat are plugged in, the card is swiped or the VIN charging operation is completed, the charging wake-up electricity is applied to the coil high side of the charging wake-up relay 1-9, the coil of the charging wake-up relay 1-9 gets electricity at this time, the charging wake-up relay 1-9 is closed at this time, and the charging wake-up distribution group 1-8 gets electricity.

[0068] When driving normally, K15 relay 1-4 is attracted at this time, vehicle controller 1-7 receives vehicle controller 15 electric from 15 electric distribution group at this time, 6th pin of vehicle controller 1-7 controls BMS relay coil to low, 7th pin of vehicle controller 1-7 controls Tbox relay coil to low, 8th pin of vehicle controller 1-7 controls multi-in-one relay coil to low, 9th pin of vehicle controller 1-7 controls MCU relay coil to low; correspondingly, BMS wake-up electric relay, Tbox wake-up electric relay, multi-in-one wake-up electric relay and MCU wake-up electric relay respectively get coil low side electricity, coil high side electricity comes from 30 electric distribution group, which is electromagnetic switch 1-2 rear constant electricity, at this time, BMS wake-up electric relay, Tbox wake-up electric relay, multi-in-one wake-up electric relay and MCU wake-up electric relay respectively output wake-up electricity to the respective controllers for wake-up.

[0069] When charging normally, charging wake-up relay 1-9 is attracted at this time, vehicle controller 1-7 receives vehicle controller 1-7 charging wake-up electricity from charging wake-up distribution group 1-8 at this time, 6th pin of vehicle controller 1-7 controls BMS relay coil to low, 7th pin of vehicle controller 1-7 controls Tbox relay coil to low, 8th pin of vehicle controller 1-7 controls multi-in-one relay coil to low; correspondingly, BMS wake-up electric relay, Tbox wake-up electric relay, multi-in-one wake-up electric relay respectively get coil low side electricity, coil high side electricity comes from 30 electric distribution group, which is electromagnetic switch 1-2 rear constant electricity, at this time, BMS wake-up electric relay, Tbox wake-up electric relay, multi-in-one wake-up electric relay respectively output wake-up electricity to the respective controllers for wake-up.

[0070] When in the delay monitoring, the vehicle controller 1-7 has an internal flag of delay monitoring, and when starting the delay monitoring, the 6th pin of the vehicle controller 1-7 controls the BMS relay coil to be low, and the 7th pin of the vehicle controller 1-7 controls the Tbox relay coil to be low; correspondingly, the BMS wake-up electric relay and the Tbox wake-up electric relay obtain the low side of the coil and the high side of the coil from the 30 electric power distribution group, which is the electromagnetic switch 1-2 after the constant power supply, at this time, the BMS wake-up electric relay and the Tbox wake-up electric relay output the wake-up electric to the respective controllers for wake-up.

[0071] Figure 2 It is a simplified function diagram of the delay monitoring system of the new energy vehicle power battery 1-10 of the embodiment, when the high voltage is powered on and the high voltage is powered off during charging, the delay monitoring state can be entered, and the delay monitoring is performed for 1 hour, during which the low voltage is powered on or the low voltage is powered off again for many times, and the delay monitoring continues, once the high voltage is powered on, the delay monitoring is broken, and the high voltage is powered off again, and the delay monitoring is started again; and at this time, the rocker switch 1-1 can be opened without charging, and the purpose of charging is achieved, and after the charging is completed, the natural power-off is performed, the electromagnetic switch 1-2 is disconnected, and the vehicle charging is completed, the electromagnetic switch 1-2 is still opened, and the charging is worry-free.

[0072] If the vehicle is in the low voltage powered-on state, the rocker electromagnetic switch 1-2 needs to be closed and the key needs to be twisted to the KEY ON state.

[0073] If the vehicle is in the low voltage powered-on state, the rocker electromagnetic switch 1-2 needs to be closed and the key needs to be twisted to the KEY ON state.

[0074] If the vehicle is in the delay monitoring low voltage state, the vehicle is in the delay monitoring state, and there is no charging wake-up and KEY ON twist, and if the vehicle is normal, the vehicle is in the delay monitoring low voltage state.

[0075] If the vehicle wants to be in the high voltage powered-on state during driving, the vehicle is in the low voltage powered-on state, the key is twisted to the START, and the vehicle can enter the high voltage powered-on state during driving.

[0076] If the vehicle wants to be in the high voltage powered-on state during charging, the vehicle is in the low voltage powered-on state during charging, the charging process is normal, and the vehicle can enter the high voltage powered-on state during driving.

[0077] Based on the delay monitoring system of the new energy vehicle power battery described in the above embodiment, the embodiment of the application further provides a delay monitoring method of a new energy vehicle power battery corresponding to the system.

[0078] Figure 3A new energy vehicle lead-acid battery delay monitoring method flow chart provided by the embodiment of the application is shown in FIG. 1, and the method comprises the following steps. Figure 3

[0079] S1, detecting whether the vehicle enters a delay monitoring stage.

[0080] S2, if yes, outputting a high level through a fifth output end to control the electromagnetic switch 1-2 to be closed, and outputting a low level through a corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to be closed, so as to wake up the BMS controller and the Tbox controller to perform delay monitoring on the power battery 1-10.

[0081] S3, detecting in real time whether high voltage is re-applied or the delay monitoring preset time length is reached.

[0082] S4, if high voltage is re-applied or the delay monitoring preset time length is reached, outputting a low level through the fifth output end to control the electromagnetic switch 1-2 to be opened.

[0083] Based on the function of the new energy vehicle power battery delay monitoring system, a specific embodiment is provided to explain in detail the new energy vehicle power battery delay monitoring method, Figure 4 which is a flow chart of the specific embodiment.

[0084] SS1, detecting in real time whether a whole-vehicle power-on signal or a charging wake-up signal is received, if yes, executing step SS2, otherwise, continuously executing step SS1.

[0085] SS2, entering a low-voltage power-on stage, at this time, if there is a timing flag bit, timing continuation is performed, if there is no timing bit, timing is not needed.

[0086] When starting, the whole-vehicle controller 1-7 detects whether there is a KEY ON signal or a charging wake-up signal, when there is any one of the signals, at this time, the low-voltage power-on stage is entered, at this time, if there is a delay power-off timing flag bit, timing continuation is performed, if there is no timing flag bit, timing is not needed.

[0087] SS3, detecting again whether there is a charging wake-up signal and a charging connection signal, if yes, executing step SS4, otherwise, executing step SS8.

[0088] SS4, entering a charging high-voltage stage, meeting a charging high-voltage application condition, clearing a timing flag bit, ending timing, and stopping sending a high level to a coil high side of the electromagnetic switch 1-2.

[0089] ​At this time, it is judged again whether there is a charging wake-up signal and a charging connection signal, and if there is, it enters the charging high-voltage stage; at this time, the charging high-voltage condition is met, and whether there is a delay or not, the delay is cleared, at this time, the timing ends, and the vehicle controller 1-7 stops sending the electromagnetic switch 1-2 coil high side (whether there is or not).

[0090] When the charging low-voltage condition is not received, the existing state is maintained at this time.

[0091] SS5, detect whether the charging low-voltage condition is received, if yes, execute step SS6, otherwise continue to execute step SS5.

[0092] SS6, output high level control through the fifth output end to close the electromagnetic switch 1-2.

[0093] SS7, detect whether the charging high-voltage relay is disconnected, if yes, execute step SS13, otherwise continue to execute step SS7.

[0094] SS8, detect whether there is a vehicle start signal, if yes, execute step SS9, otherwise return to step SS3.

[0095] SS9, enter the driving high-voltage stage, meet the driving high-voltage condition, clear the timing flag, timing ends, stop sending high level to the electromagnetic switch 1-2 coil high side.

[0096] If there is a START signal, enter the driving high-voltage stage, at this time, the driving high-voltage condition is met, and whether there is a delay or not, the delay is cleared, at this time, the timing ends, and the vehicle controller 1-7 stops sending the electromagnetic switch 1-2 coil high side (whether there is or not).

[0097] When the driving low-voltage condition is not received, the existing state is maintained at this time.

[0098] SS10, detect whether the driving low-voltage condition is received, if yes, execute step SS11, otherwise continue to execute SS10.

[0099] SS11, output high level control through the fifth output end to close the electromagnetic switch 1-2.

[0100] SS12, detect whether the main negative high-voltage relay is disconnected, if yes, execute step SS13, otherwise execute step SS12.

[0101] SS13, send a delay monitoring flag frame to the timing flag and start counting down the delay monitoring preset time, and output low level control through each wake-up output end to close each wake-up relay, so as to wake up each monitoring controller to monitor the power battery 1-10.

[0102] When the high-voltage condition under charging is received, the vehicle controller 1-7 sends the high side of the electromagnetic switch 1-2 at this time, so that the electromagnetic switch 1-2 remains attracted; Then judge whether to receive the high-voltage relay disconnect condition, not received, then wait, received, send delay monitoring flag frame to the timing flag bit and start counting down 1h, and at the same time to BMS and Tbox wake up electricity, please BMS continuously send battery message, Tbox receives.

[0103] When the high-voltage condition under driving is received, the vehicle controller 1-7 sends the high side of the electromagnetic switch 1-2 at this time, so that the electromagnetic switch 1-2 remains attracted; Then judge whether to receive the main negative high-voltage relay disconnect condition, not received, then wait, received, send delay monitoring flag frame to the timing flag bit and start counting down 1h, and at the same time to BMS and Tbox wake up electricity, please BMS continuously send battery message, Tbox receives.

[0104] SS14, in the delay monitoring phase, detect whether to receive the whole vehicle power-on signal or charging wake-up signal, if yes, return to step SS1, otherwise execute step SS15.

[0105] SS15, after the timing delay monitoring preset time, stop sending low voltage to each wake-up relay, and stop sending high voltage to the coil high side of the electromagnetic switch 1-2 to keep the electromagnetic switch 1-2 open.

[0106] During the delay monitoring period, it is judged whether the Keyon signal or the charging wake-up signal is received. When it is, it returns to the initial state and reenters the low-voltage power-on phase. When the Keyon signal and the charging wake-up signal are not received, the wake-up electricity is turned off, and after the timing is over, the 30 electricity is turned off, the high side of the electromagnetic switch 1-2 is sent to 0, so that the electromagnetic switch 1-2 remains open, and then the process ends.

[0107] The embodiment also provides a low-voltage power-on phase flow, Figure 5 is a low-voltage power-on phase flow diagram, which specifically includes the following steps.

[0108] Step 1, detect whether it is a charging wake-up low-voltage power, if yes, execute step 2, otherwise execute step 3.

[0109] Step 2, the charging wake-up power distribution group 1-8 gets electricity to drive the electromagnetic switch 1-2 to close, at the same time, the vehicle controller 1-7 responds to the charging wake-up signal, outputs low voltage through the corresponding wake-up output end to control the BMS wake-up relay, the Tbox wake-up relay, the multi-combination wake-up relay to wake up the BMS controller, the Tbox controller, the multi-combination controller to enter the pre-charging phase.

[0110] Of course at this time BMS controller and Tbox controller are also awakened, at this time BMS controller will output the state of power battery system through CAN line, Tbox controller will acquire these information, thereby uploading to platform.

[0111] Step 3, detect whether it is full vehicle power low voltage, if yes, execute step 4, otherwise return to execute step 1.

[0112] Step 4, vehicle controller 1-7 responds to full vehicle power signal, through corresponding wake-up output end outputs low level control BMS wake-up electric relay, Tbox wake-up electric relay, multi-combination wake-up relay, MCU wake-up relay to close to wake up BMS controller, Tbox controller, multi-combination controller, MCU controller to enter the preparatory driving stage.

[0113] Of course at this time BMS controller and Tbox controller are also awakened, at this time BMS controller will output the state of power battery system, Tbox controller will acquire these information, thereby uploading to platform, of course if at this time to enter to the real driving high voltage stage, the fourth input end of vehicle controller receives START signal from key, receives START signal, no other influence driving high voltage fault, vehicle controller will control to drive high voltage.

[0114] Start to judge whether to enter low voltage power stage, no, continue to wait; yes, judge whether it is charging wake-up low voltage, yes, accept wake-up signal vehicle controller 1-7 low voltage: make electromagnetic switch 1-2 attract, and wake up BMS and multi-combination and Tbox and the like; if there is a timing flag, time continues, if there is no timing flag, no timing, then end; no, judge whether it is KEY ON low voltage, no, rejudge whether it is charging wake-up low voltage; yes, then accept wake-up signal vehicle controller 1-7 low voltage: wake up BMS and multi-combination, MCU and Tbox and the like, if there is a timing flag, time continues, if there is no timing flag, no timing; then end.

[0115] The above disclosed is only the preferred embodiment of the present application, but the present application is not limited to this, any person skilled in the art can think of non-creative changes, and several improvements and refinements made without departing from the principles of the present application, should fall within the scope of the present application.

Claims

1. A new energy vehicle power battery delay monitoring system, characterized in that, The system comprises 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 a constant power distribution group through 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 comprises 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 a BMS controller and a Tbox controller respectively, the high side of the coil of each wake-up relay is connected to the constant power distribution group, and the low side of the coil is connected to the corresponding wake-up output end of the vehicle controller; when the vehicle controller detects that it enters the delay monitoring stage, a high level is output through the fifth output end to control the electromagnetic switch to close, and a low level is output through the corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to close, so as to wake up the BMS controller and the Tbox controller to monitor the power battery, and after a preset time length of delay monitoring or when it is detected that the high voltage is reconnected, a floating level is output through the fifth output end to control the electromagnetic switch to open.

2. The new energy vehicle power battery delay monitoring system according to claim 1 is characterized in that: The wake-up relay group further comprises a multi-in-one wake-up relay, the contacts of the multi-in-one wake-up electric relay are connected to a multi-in-one controller, the high side of the coil of the multi-in-one wake-up relay is connected to the constant power distribution group, and the low side of the coil is connected to the corresponding wake-up output end of the vehicle controller; The system further comprises a charging wake-up relay and a charging wake-up power distribution group; one end of the contacts of the charging wake-up relay is connected to the lead-acid battery, and the other end is connected to the charging wake-up power 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 from the charging pile through the charging gun; the charging wake-up power distribution group comprises at least two output powers, one of which is connected to the third input end of the vehicle controller, and the other of which 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 power distribution group is powered, thereby driving the electromagnetic switch to close, and after the vehicle controller receives the charging wake-up signal from the third input end, a low level is output through the corresponding wake-up output end 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.

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

4. The new energy vehicle power battery delay monitoring system according to claim 3, characterized in that, The wake-up relay group further comprises an MCU wake-up relay, the contacts of the MCU wake-up electric relay are connected to an MCU controller, the high side of the coil of the MCU wake-up relay is connected to the constant power distribution group, and the low side of the coil is connected to the corresponding wake-up output end of the vehicle controller; The system further comprises a K15 relay and a full-vehicle power distribution group; one end of the contact of the K15 relay is connected to the constant power distribution group, and the other end is connected to the full-vehicle 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 gear electricity; the full-vehicle power distribution group comprises one output electric connection input into the second input end of the vehicle controller; when normal driving, the K15 relay is closed, the vehicle controller receives the full-vehicle power 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, the Tbox wake-up electric relay, the multi-in-one wake-up relay, and the MCU wake-up relay to be closed, so as to wake up the BMS controller, the Tbox controller, the multi-in-one controller, and the MCU controller to enter the preparatory driving stage.

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

6. A new energy vehicle power battery delay monitoring method, characterized in that, The method is realized based on the system of any one of claims 1 to 5, comprising the following steps: detecting whether the vehicle enters the delay monitoring stage; if yes, outputting a high level through the fifth output end to control the electromagnetic switch to be closed, and outputting a low level through the corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to be closed, so as to wake up the BMS controller and the Tbox controller to monitor the power battery in delay; real-time detecting whether the high voltage is reconnected or the delay monitoring preset time length is reached; if the high voltage is reconnected or the delay monitoring preset time length is reached, outputting a suspended level through the fifth output end to control the electromagnetic switch to be opened.

7. The new energy vehicle power battery delay monitoring method according to claim 6, characterized in that, detecting whether the vehicle enters the delay monitoring stage; if yes, outputting a high level through the fifth output end to control the electromagnetic switch to be closed, and outputting a low level through the corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to be closed, so as to wake up the BMS controller and the Tbox controller to monitor the power battery in delay, specifically comprising: detecting whether the charging low voltage condition or the driving low voltage condition is received; if the charging low voltage condition is received, outputting a high level through the fifth output end to control the electromagnetic switch to be closed; detecting whether the charging high voltage relay opening condition is received; if not, continuing to wait for the charging high voltage relay opening condition; if received, sending a delay monitoring flag frame to the timing flag bit and starting to count down the delay monitoring preset time length, and outputting a low level through the corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to be closed, so as to wake up the BMS controller and the Tbox controller to monitor the lead-acid battery in delay; if the driving low voltage condition is received, outputting a high level through the fifth output end to control the electromagnetic switch to be closed; detecting whether the main negative high voltage relay opening condition is received; if not, continuing to wait for the main negative high voltage relay opening condition; if received, sending a delay monitoring flag frame to the timing flag bit and starting to count down the delay monitoring preset time length, and outputting a low level through the corresponding wake-up output end to control the BMS wake-up electric relay and the Tbox wake-up electric relay to be closed, so as to wake up the BMS controller and the Tbox controller to monitor the power battery in delay.

8. The new energy vehicle power battery delay monitoring method according to claim 7, characterized in that, real-time detecting whether the high voltage is reconnected or the delay monitoring preset time length is reached; If the high voltage is recharged or the delay monitoring preset time is reached, the electromagnetic switch is turned off through the fifth output end, which specifically includes: Real-time detection of whether a full-vehicle power-on signal or a charging wake-up signal is received; If the full-vehicle power-on signal or the charging wake-up signal is received, the low-voltage power-on phase is entered, at which time if there is a timing flag bit, timing is continued, and if there is no timing bit, timing is not required; The charging wake-up signal and the charging connection signal are detected again; If the charging wake-up signal and the charging connection signal are present, the charging high-voltage phase is entered, the charging high-voltage condition is met, the timing flag bit is cleared, the timing is completed, and the high side of the electromagnetic switch coil is stopped from being sent a high level; If there is no charging wake-up signal and charging connection signal, it is detected whether there is a vehicle start signal; If there is no vehicle start signal, it is continuously detected whether there is a charging wake-up signal and a charging connection signal; If there is a vehicle start signal, the driving high-voltage phase is entered, the driving high-voltage condition is met, the timing flag bit is cleared, the timing is completed, and the high side of the electromagnetic switch coil is stopped from being sent a high level; If the full-vehicle power-on signal or the charging wake-up signal is not received, after the timing delay monitoring preset time is reached, the low level is stopped from being sent to the BMS wake-up electric relay and the Tbox wake-up electric relay, and the high level is stopped from being sent to the high side of the electromagnetic switch coil, so that the electromagnetic switch remains open.

9. The new energy vehicle power battery delay monitoring method according to claim 8, characterized in that, After entering the low-voltage power-on phase, the following steps are further included: It is detected whether it is a charging wake-up low-voltage power; If it is a charging wake-up low-voltage power, the charging wake-up power distribution group is powered to drive the electromagnetic switch to close, and after the vehicle controller receives the charging wake-up signal from the third input end, a low level is output through the corresponding wake-up output end to control the BMS wake-up electric relay, the Tbox wake-up electric relay, and the multi-combination wake-up relay to close to wake up the BMS controller, the Tbox controller, and the multi-combination controller to enter the pre-charging phase; If it is not a charging wake-up low-voltage power, it is detected whether it is a full-vehicle power-on low-voltage power; If it is a full-vehicle power-on low-voltage power, the vehicle controller responds to the full-vehicle power-on signal and outputs a low level through the corresponding wake-up output end to control the BMS wake-up electric relay, the Tbox wake-up electric relay, the multi-combination wake-up relay, and the MCU wake-up relay to close to wake up the BMS controller, the Tbox controller, the multi-combination controller, and the MCU controller to enter the pre-driving phase; If it is not a full-vehicle power-on low-voltage power, it is re-determined whether it is a charging wake-up low-voltage power.

10. A new energy vehicle, characterized in that, The system of any one of claims 1-5 is configured.

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