CN116141974A

CN116141974A - Vehicle power supply device, power supply method and vehicle

Info

Publication number: CN116141974A
Application number: CN202310172772.2A
Authority: CN
Inventors: 王锐; 田飞云; 胡杰
Original assignee: Sany Electric Vehicle Technology Co Ltd
Current assignee: Sany Electric Vehicle Technology Co Ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-05-23

Abstract

The invention relates to the field of vehicles and provides a vehicle power supply device, a power supply method and a vehicle, wherein the vehicle power supply device comprises a first power transmission line, a second power transmission line, an ignition lock, a whole vehicle controller, and a power supply controller, a high-voltage power battery, a low-voltage battery and a voltage conversion module which are integrated in the same box body; a first on-off device is arranged on the first power transmission line; a second switching device is arranged on the second power transmission line; the power supply controller outputs a first control signal for controlling the conduction of the second power transmission line to the second switching device when the first switching device conducts the first power transmission line, and controls the voltage conversion module to charge the low-voltage battery based on the state information of the low-voltage battery; when the second transmission line is conducted, the whole vehicle controller outputs a second control signal for controlling the second transmission line to be conducted to the second switching-off device when an ON gear signal of the ignition lock is detected. The problem of vehicle power supply safety and reliability low is solved, and reliability and safety are improved.

Description

Vehicle power supply device, power supply method and vehicle

Technical Field

The present invention relates to the field of vehicle technologies, and in particular, to a vehicle power supply device, a power supply method, and a vehicle.

Background

The high-voltage power battery, the low-voltage battery and the voltage conversion module in the power supply system of the vehicle play an important role in the vehicle, the high-voltage power battery provides power for the vehicle, and the high-voltage power battery supplies power for the low-voltage battery and other electric appliances through the voltage conversion module during running of the vehicle.

However, the power supply safety and reliability of the vehicle during power-up in the related art are always the problems to be solved in the art.

Disclosure of Invention

The invention provides a vehicle power supply device, a power supply method and a vehicle, which are used for solving the problem of low power supply safety and reliability when the vehicle is electrified in the prior art and improving the power supply safety and reliability when the vehicle is electrified.

The invention also provides a vehicle power supply device, comprising: the power supply controller, the high-voltage power battery, the low-voltage battery and the voltage conversion module are integrated in the same box body; the vehicle control system also comprises an ignition lock, a vehicle controller, a first power transmission line and a second power transmission line;

the low-voltage battery is connected with the first power transmission line and is used for supplying power to the power supply controller; the first power transmission line is provided with a first on-off device for controlling the on-off of the first power transmission line;

The low-voltage battery is connected with the second power transmission line and is used for providing constant electricity; the voltage conversion module is powered by the second power transmission line; a second switching device for controlling the on-off of the second power transmission line is arranged on the second power transmission line;

the power supply controller is used for entering a working mode when the first power transmission line is conducted by the first on-off device, and outputting a first control signal to the second on-off device if the corresponding power supply condition is met by the low-voltage battery; if the high-voltage power battery meets the corresponding power supply condition, based on the state information of the low-voltage battery, controlling the voltage conversion module to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery; the first control signal is used for controlling the second transmission line to be conducted;

the whole vehicle controller is respectively connected with the second power transmission line, the second switching device and the ignition lock and is used for outputting a second control signal to the second switching device when an ON gear signal of the ignition lock is detected when the second power transmission line is conducted; the second control signal is used for controlling the second power transmission line to be conducted.

The invention provides a vehicle power supply device, which also comprises a standby power supply;

the voltage conversion module is connected with the standby power supply and is used for supplying power to the voltage conversion module when the low-voltage battery has an open-circuit fault;

the power supply controller is also used for controlling the voltage conversion module to replace the low-voltage battery to supply power when the low-voltage battery has an open-circuit fault.

According to the vehicle power supply device provided by the invention, the standby power supply comprises an inductor and a capacitor.

According to the vehicle power supply device provided by the invention, the whole vehicle controller is used for stopping outputting the second control signal to the second switching device when the ON gear signal of the ignition lock is not detected.

The vehicle power supply device provided by the invention further comprises a third power transmission line; the low-voltage battery is connected with the third power transmission line and is also used for supplying power to the first electric appliance through the third power transmission line; the first electric appliance is an electric appliance which does not need constant electricity; a third disconnection device for controlling the on-off of the third transmission line is arranged on the third transmission line;

the power supply controller is connected with the third switching-off device and is used for outputting a third control signal to the third switching-off device when the low-voltage battery meets corresponding power supply conditions and the high-voltage power battery meets corresponding power supply conditions; and the third control signal is used for controlling the conduction of the third power transmission line.

According to the vehicle power supply device provided by the invention, the whole vehicle controller is further connected with the third switching-off device and is used for outputting a fourth control signal to the third switching-off device when the ON gear signal of the ignition lock is detected; and the fourth control signal is used for controlling the conduction of the third power transmission line.

According to the vehicle power supply device provided by the invention, the state information of the low-voltage battery comprises the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; the vehicle power supply device further comprises a voltage acquisition module, a current acquisition module and a temperature acquisition module;

the voltage acquisition module is used for acquiring the voltage of the low-voltage battery;

the current acquisition module is used for acquiring the current of the low-voltage battery;

the temperature acquisition module is used for acquiring the temperature of the low-voltage battery;

the power supply controller is connected with the voltage acquisition module, the current acquisition module and the temperature acquisition module and is used for acquiring the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; and determining whether the low-voltage battery meets corresponding power supply conditions based on the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery.

The invention also provides a vehicle power supply method based on the vehicle power supply device, which comprises the following steps:

the power supply controller enters a working mode when the first power transmission line is conducted by the first on-off device, and if the first power transmission line meets the corresponding power supply condition, a first control signal is output to the second on-off device; if the high-voltage power battery meets the corresponding power supply condition, based on the state information of the low-voltage battery, controlling the voltage conversion module to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery; the first control signal is used for controlling the second transmission line to be conducted;

when the whole vehicle controller detects an ON gear signal of the ignition lock when the second power transmission line is conducted, a second control signal is output to the second switching device; the second control signal is used for controlling the second power transmission line to be conducted.

The vehicle power supply method provided by the invention further comprises the following steps:

and when the vehicle controller does not detect the ON gear signal of the ignition lock, stopping outputting the second control signal to the second switching-off device.

The invention also provides a vehicle comprising the vehicle power supply device or for executing the vehicle power supply method.

According to the vehicle power supply device, the power supply method and the vehicle, the voltage conversion module and the high-voltage power battery are integrated in the same box body, so that the high-voltage line between the voltage conversion module and the high-voltage power battery is not exposed to cause damage to human bodies even if the vehicle is maintained during charging as long as the box body of the high-voltage power battery pack is not dismounted, the maintenance safety of the vehicle in the charging process is further ensured, and the power supply safety of the vehicle and the safety of the whole vehicle are also improved; in addition, the whole vehicle controller also has the same control function to the second transmission line as the power supply controller, and when the power supply controller fails in the running process of the vehicle, the whole vehicle controller continuously controls the second transmission line to be conducted, so that the dual control function can improve the power supply reliability of the power supply device of the vehicle, and simultaneously, more time is given to a user for adjusting the vehicle, and the power supply safety and the running safety in the running process of the vehicle are ensured.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a vehicle power supply device according to an embodiment of the present invention;

FIG. 2 is a second schematic diagram of a power supply device for a vehicle according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a vehicle power supply device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a working process of a vehicle power supply device according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a working process of a power supply device for a vehicle according to an embodiment of the present invention;

FIG. 6 is a schematic flow chart of a method for powering a vehicle according to an embodiment of the present invention;

reference numerals:

100: a case; 110: a first on-off device; 120: a second switching device; 121: a first diode; 122: a second diode;

130 igniting the lock; 131: LOCK gear; 132: ACC gear; 133: an ON gear; 134: ST gear; 135: an IG1 gear; 136: an IG2 gear; 137: an ignition lock fuse;

140: a vehicle controller; 150: a power supply controller; 160: a high voltage power cell;

170: a low voltage battery; 171: a current collection harness; 172: a voltage acquisition harness; 173: a temperature acquisition wire harness; 174: a current sensor;

180: a voltage conversion module;

210: a third switching-off device; 211: a third diode; 212: a fourth diode;

220: a fourth switching-off device; 230: a fifth on-off device;

240: a first electrical appliance; 250: a second electrical consumer; 260: a third electrical appliance;

270: a sixth on-off device;

310: a first fuse; 320: a second fuse; 330: a third fuse; 340: a fourth fuse; 350: a fifth fuse;

360: the whole vehicle is ON line;

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the related art, a vehicle may include a high-voltage power battery pack, a low-voltage battery pack, and an all-in-one module integrated with a voltage conversion module. The high-voltage power battery pack is internally provided with a high-voltage power lithium battery, a high-voltage battery control board, a cooling structure and the like. The low-voltage battery pack is internally provided with a low-voltage battery and a low-voltage battery control board, and the low-voltage battery pack does not contain a cooling structure. Besides the voltage conversion module, the integrated all-in-one module also comprises an oil pump, an air pump, a high-voltage distribution board, a voltage conversion module control board, a CAN module and the like, and the inside of the all-in-one module also does not comprise a cooling structure. However, in the related art, when a user parks and charges, if there is a need for repairing the vehicle at this time, since a high voltage input line between the high voltage power battery and the voltage conversion module is exposed outside a battery box of the high voltage power battery pack, a high voltage circuit in the charging process of the vehicle is prone to causing a safety accident, which indicates that the safety and reliability of the power supply of the vehicle are low when the vehicle is powered on.

In order to solve the problem of low safety and reliability when the vehicle is electrified in the related art, the invention provides a vehicle power supply device which can be applied to vehicles requiring high-voltage power batteries and low-voltage battery power supply, such as electric automobiles, electric working machines and the like.

Embodiments of a vehicle power supply apparatus provided by the present invention will now be described with reference to fig. 1 to 5. It should be understood that the following are merely illustrative embodiments of the present invention, and are not intended to limit the present invention in any way.

An embodiment of the present invention provides a vehicle power supply apparatus, as shown in fig. 1 to 3, including: a power controller 150, a high-voltage power battery 160, a low-voltage battery 170 and a voltage conversion module 180 integrated in the same case; the vehicle control system further comprises an ignition lock 130, a vehicle controller 140, a first power transmission line and a second power transmission line;

the low-voltage battery 170 is connected to the first power transmission line and is used for supplying power to the power supply controller 150; the first power transmission line is provided with a first on-off device 110 for controlling the on-off of the first power transmission line;

the low-voltage battery 170 is connected with the second power transmission line and is used for providing constant electricity; the voltage conversion module 180 is powered by the second transmission line; a second switching device 120 for controlling the on-off of the second transmission line is arranged on the second transmission line;

the power controller 150 is configured to enter a working mode when the first on-off device 110 turns on the first power transmission line, and if the battery 170 meets a corresponding power supply condition, output a first control signal to the second on-off device 120; if the high-voltage power battery 160 meets the corresponding power supply condition, based on the state information of the low-voltage battery 170, the control voltage conversion module 180 converts the voltage of the high-voltage power battery 160 into a target voltage to charge the low-voltage battery 170; the first control signal is used for controlling the conduction of the second transmission line;

The vehicle controller 140 is respectively connected with the second power transmission line, the second switching device 120 and the ignition lock 130, and is configured to output a second control signal to the second switching device 120 when detecting an ON-gear signal of the ignition lock 130 when the second power transmission line is turned ON; the second control signal is used for controlling the conduction of the second power transmission line.

It should be noted that, the vehicle power supply device provided in the embodiment of the present invention changes the setting position of the low-voltage battery in the vehicle in the related art, and may cancel the original low-voltage battery pack, and integrate the low-voltage battery and the high-voltage power battery in the original low-voltage battery pack into the same box 100, so that the battery frame, the battery cover plate and related accessories of the original low-voltage battery pack may be omitted, and the cost is reduced. Further, the setting position of the voltage conversion module in the related art is changed, the setting of the original voltage conversion module in the multiple-in-one module can be canceled, and the voltage conversion module 180 is also integrated in the same box 100, so that the high voltage wire harness from the high voltage power battery to the high voltage distribution board and from the high voltage distribution board to the original voltage conversion module in the multiple-in-one module can be omitted, and meanwhile, the low voltage wire harness from the original voltage conversion module in the multiple-in-one module to the positive and negative electrodes of the low voltage battery can be omitted, and the connection between the high voltage battery 170 and the voltage conversion module can be realized through the copper bars in the embodiment, so that the cost is further reduced. In addition, the low-voltage battery and the voltage conversion module of the vehicle in the related art are connected through a power line with the square of 25, the longer power line leads to higher wire harness cost and higher weight of the power line, and the connection mode of the low-voltage battery and the voltage conversion module of the vehicle in the related art cannot guarantee the reliability of charging the low-voltage battery because the power line has higher requirements on dust prevention and water prevention, while the low-voltage battery 170 and the voltage conversion module 180 are integrated in the same box 100, the connection between the low-voltage battery 170 and the voltage conversion module 180 can be realized through copper bars, and the effective reduction of the cost and the weight of the electric vehicle is realized.

It should be noted that, the same box 100 may be a battery box of an original high-voltage power battery pack in the related art, so that the low-voltage battery 170 and the voltage conversion module 180 may be disposed in a spare space of the battery box of the original high-voltage power battery pack, and the same box 100 may also be a new non-standard battery box manufactured after the high-voltage power battery 160, the low-voltage battery 170 and the voltage conversion module 180 are integrated together. Further, the battery pack in which the same case 100 is located is assembled to a position nearest to the vehicle frame to achieve the minimization of the low voltage line.

Specifically, the voltage conversion module 180 is connected to the high-voltage power battery 160 and the low-voltage battery 170, respectively. For example, in the same box 100, the high-voltage power battery 160 and the voltage conversion module 180 may be connected through a high-voltage positive input line and a high-voltage negative input line, and the low-voltage battery 170 is used to supply power to the voltage conversion module 180 and a low-voltage electric appliance of the vehicle, for example, the low-voltage battery 170 may be a 24V low-voltage lithium battery. The high-voltage power battery 160 is used for providing a power source for the electric vehicle, and meanwhile, when the high-voltage power battery 160 meets the power supply condition, the high-voltage power battery 160 converts the output high-voltage into the target voltage required by the low-voltage battery 170 by using the voltage conversion module 180 so as to charge the low-voltage battery 170. In addition, the power controller 150 and the voltage conversion module 180 may be connected through the inner CANH line and the inner CANL line, so that data interaction between the power controller 150 and the voltage conversion module 180 may be performed.

Specifically, the vehicle power supply device further includes a first switching device 110 and a second switching device 120. As shown in fig. 1, 2 and 3, the first on-off device 110 is connected to the power controller 150 and the low voltage battery 170, respectively, and at the same time, the first on-off device 110, the low voltage battery 170 and the power controller 150 are connected in the first power transmission line, so that after the user presses the first on-off device 110, the first power transmission line is turned on, the low voltage battery 170 may start to supply power to the electric appliances in the first power transmission line, such as the power controller 150, and thus, the power controller 150 starts to enter the operation mode after being supplied with power. After the power controller 150 enters the operation mode, it may detect whether the low voltage battery 170 meets the power supply condition, for example, it may be determined whether the low voltage battery 170 meets the power supply condition by detecting state information of the low voltage battery 170, for example, the state information of the low voltage battery 170 may include a voltage of the low voltage battery, a current of the low voltage battery, and a temperature of the low voltage battery, for example, the low voltage battery 170 meets the power supply condition may be that the voltage of the low voltage battery is within a preset voltage range, the current of the low voltage battery is within a preset current range, and the temperature of the low voltage battery is within a preset temperature range, and when it is determined that the low voltage battery 170 meets the power supply condition, the power controller 150 generates a first control signal to control the second switching device 120 to be closed, and then turns on the second power transmission line. Since the voltage conversion module 180 is powered by the second power transmission line, after the second switching device 120 is closed, the voltage conversion module 180 connected to the second power transmission line is powered by the low-voltage battery 170, so that the voltage conversion module 180 can work normally, and meanwhile, the low-voltage battery 170 supplies power to low-voltage electrical appliances connected to the second power transmission line, for example, to the ignition lock 130, the lighting system, the air-conditioning control system, and the like. The state information of the battery 170 is always detected in real time when the power controller 150 is in the operation mode. Under the condition that the corresponding condition is satisfied, the power supply controller 150 may determine that the high-voltage power battery 160 satisfies the power supply condition by detecting the operation state of the high-voltage power battery 160 without a fault, when both the high-voltage power battery 160 and the low-voltage battery 170 satisfy the power supply condition, calculate the remaining capacity of the low-voltage battery 170 by detecting the state information of the low-voltage battery 170 in real time, determine whether the low-voltage battery 170 satisfies the charging condition according to the remaining capacity, that is, determine whether the low-voltage battery 170 needs to be charged, if the low-voltage battery 170 satisfies the charging condition, control the voltage conversion module 180 to convert the high-voltage output by the high-voltage power battery 160 into the target voltage required by the low-voltage battery 170, charge the low-voltage battery 170, for example, when the remaining capacity of the low-voltage battery 170 is lower than 30%, the remaining capacity is lower at this time, in other words, charge the low-voltage battery 170 only needs to be charged when the low-voltage battery 170 satisfies the charging condition, and charge the low-voltage battery 170 does not need to be charged when the low-voltage battery 170 does not satisfy the charging condition, so that not only the use of the low-voltage battery 170 can be saved, but also the service life of the low-voltage battery 170 can be increased.

Further, as shown in fig. 3, the second switching device 120 may be a relay, where the relay includes a normally open contact and a coil, when the power controller 150 controls the relay to be closed, the coil of the relay is controlled to be electrified first, and the normally open contact is attracted from an open state to a closed state after the coil of the relay is electrified, and after the normally open contact is closed, that is, the second switching device 120 is closed, and then the second power transmission line is turned on, so that the low-voltage battery performs normal power supply. Therefore, the relay is not limited by lower working temperature and is not easy to break down under high pressure by utilizing the temperature resistance and pressure resistance of the relay, and the working efficiency and safety of the power supply process of the vehicle power supply device are improved.

Specifically, as shown in fig. 1, 2 and 3, the vehicle power supply device further includes a vehicle controller 140 and an ignition lock 130. As shown in fig. 3, the ignition lock 130 includes four gear positions: LOCK gear 131, ACC gear 132, ON gear 133 and ST gear 134, wherein ON gear 133 connects with IG1 gear 135 and IG2 gear 136 simultaneously, and when ignition LOCK 130 is turned ON gear 133, it is equivalent to the ignition LOCK being turned ON simultaneously with IG1 gear 135 and IG2 gear 136, which indicates that the vehicle is in full power. The vehicle controller 140 is connected to the ignition lock 130, and the second switching device 120 is connected to the second power transmission line, and when the ignition lock 130 is turned to the ON gear, an ON gear signal is sent out, and the vehicle controller 140 can detect the ON gear signal. In practical application, before the ON-gear signal is generated, if a user needs to use electricity for a vehicle, the user can press the first ON-off device 110 connected with the low-voltage battery 170 by hand, after the first ON-off device 110 is closed, the first power transmission line where the power controller 150 is located is turned ON, the power controller 150 enters into a working mode, after the power controller 150 begins to work, the state information of the low-voltage battery 170 is detected, when the low-voltage battery 170 meets the corresponding power supply condition, the power controller 150 outputs the first control signal to the second ON-off device 120, the second ON-off device 120 is closed, the second power transmission line where the second ON-off device 120 is located turns ON the low-voltage battery 170 to start to supply power to the voltage conversion module 180 connected in the second power transmission line, and meanwhile, normal-voltage power is supplied to other low-voltage electric appliances such as the ignition lock 130 in the second power transmission line.

After the ON range signal is generated, the vehicle controller 140 detects the ON range signal, and at this time, the vehicle controller 140 outputs a second control signal to the second switching device 120 for controlling the second transmission line to remain ON. In addition, as shown in fig. 3, the second switching device 120 is connected to the power controller 150 through a first diode 121, the second switching device 120 is connected to the vehicle controller 140 through a second diode 122, the first diode 121 is used for preventing the current between the vehicle controller 140 and the second switching device 120 from flowing back to the power controller 150, and similarly, the second diode 122 is used for preventing the current between the power controller 150 and the second switching device 120 from flowing back to the vehicle controller 140. The second transmission line is designed to be turned on by the power controller 150 and the vehicle controller 140 through the respective on-off device control lines at the same time, because in the related art, the control of the second on-off device 120 is controlled by only a single on-off device control line, once the single on-off device control line is turned off, the second transmission line cannot be turned on, and the reliability of the power supply of the vehicle is very low, for example, when the power controller 150 fails during the driving of the vehicle, at this time, the second transmission line is turned off, the voltage conversion module 180 stops working due to power failure, and other low-voltage electric appliances in the second transmission line, such as the ignition lock 130, the power controller 150 of the driving motor, and other power controllers 150, stop working due to power failure, so that sudden power failure of the vehicle during the driving of the vehicle may cause the whole vehicle to be out of control, which is very dangerous.

In order to prevent this, in this embodiment, the vehicle power supply device is designed to control the power supply controller 150 and the whole vehicle controller 140 to simultaneously control the second switching device 120 to be closed, that is, to conduct the second power transmission line, so that, in the running process of the vehicle, once the power supply controller 150 fails, the whole vehicle controller 140 can keep the second power transmission line to conduct by using the second control signal continuously output by the second switching device 120, so that the second power transmission line can be ensured to continue to work and the vehicle can temporarily run, and more time is given to the user for adjusting the vehicle, thus, the power supply controller 150 and the whole vehicle controller 140 realize a dual control function on the second power transmission line, the reliability of the second power transmission line for supplying power to the vehicle is improved, and meanwhile, the power supply safety and the running safety in the running process are ensured.

The vehicle power supply device provided in this embodiment has many beneficial effects, in the first aspect, the voltage conversion module is disposed in the original all-in-one module, when a user parks and charges, if there is a need for repairing the vehicle at this time, since the high voltage input line between the high voltage power battery and the voltage conversion module is exposed outside the battery box of the high voltage power battery pack, the high voltage circuit in the vehicle charging process is easy to cause a safety accident, in the power supply device in this embodiment, since the voltage conversion module 180 and the high voltage power battery 160 are integrated in the same box 100 together, even if the vehicle is in maintenance in the charging process, the damage to the human body is not caused, and thus, the power supply safety of the vehicle power supply device and the safety of the whole vehicle are improved; in the second aspect, the whole vehicle controller 140 also has the same control function as the power controller 150 for the second power transmission line, and when abnormal conditions such as open-circuit faults in the low voltage battery 170 or failure of the power controller 150 occur in the running process of the vehicle, the whole vehicle controller 140 takes over control of temporary running of the second power transmission line, so that the dual control function can improve the power supply reliability of the power supply device of the vehicle, and simultaneously provide more time for a user to adjust the vehicle, so that the power supply safety and the running safety in the running process of the vehicle are ensured; in the third aspect, the low-voltage battery 170 and the high-voltage power battery 160 are integrated in the same box 100, so that a battery frame, a battery cover plate and related accessories of the original low-voltage battery pack can be omitted, the cost and weight of the first layer can be reduced, meanwhile, the installation space can be saved, the assembly process can be reduced, and the assembly cost can be reduced; in the fourth aspect, the voltage conversion module, the high-voltage power battery and the low-voltage battery in the original all-in-one module in the related art are integrated in the same box 100, so that the high-voltage power battery 160, the high-voltage power panel and the high-voltage wire harness of the original all-in-one module voltage conversion module 180 can be omitted, the low-voltage wire harness of the positive electrode and the negative electrode of the original all-in-one module voltage conversion module 180 and the low-voltage battery 170 can be omitted, the connection between the low-voltage battery 170 and the voltage conversion module 180 can be realized through the copper bars, the reliability is improved, the cost and weight of the second layer are reduced, the weight of the vehicle is reduced, and the whole vehicle performance of the vehicle can be improved.

In an exemplary embodiment, the vehicle power supply apparatus further includes a backup power source;

the voltage conversion module 180 is connected with a standby power supply and is used for supplying power to the voltage conversion module 180 when the battery 170 has an open circuit fault;

the power supply controller 150 is further configured to control the voltage conversion module 180 to replace the power supply of the low-voltage battery 170 when the low-voltage battery 170 fails to break.

Specifically, the vehicle power supply device further includes a backup power source. Illustratively, the backup power source includes an inductance and a capacitance. The standby power supply is composed of a capacitor and an inductor, and can store electric quantity, when the low-voltage battery 170 has an open-circuit fault, the standby power supply can continuously supply power to the voltage conversion module 180 at the moment of the open-circuit fault, so that normal operation of the voltage conversion module 180 is ensured, and meanwhile, the power supply controller 150 can continuously maintain communication connection with the voltage conversion module 180 through a CANL line and a CANH line so as to control the voltage conversion module 180 to continuously replace the low-voltage battery 170 to supply power to corresponding electric appliances in a corresponding power transmission line.

The vehicle power supply device provided in this embodiment further improves the reliability and safety of power consumption of the vehicle by providing a standby power supply to the voltage conversion module 180 for standby power supply.

In an exemplary embodiment, the vehicle controller 140 is configured to stop outputting the second control signal to the second switching device 120 when the ON range signal of the ignition lock 130 is not detected.

Specifically, the presence of the ON signal indicates that the vehicle is in a driving process, and after the vehicle controller 140 enters a working state, the ON signal sent by the ignition lock 130 is always detected in real time, as shown in fig. 2 and 3, the power supply controller 150 is also connected to the ignition lock 130, so that the power supply controller 150 can always detect the ON signal in a working mode, and thus, when the vehicle is in a driving process, both the power supply controller 150 and the vehicle controller 140 can detect the ON signal. If the running process of the vehicle is normal, if the vehicle controller 140 cannot detect the ON gear signal within the first preset time period, it indicates that the user is about to stop the vehicle, at this time, the vehicle controller 140 does not output the second control signal to the second switching device 120 any more, and at the same time, the power controller 150 also stops outputting the first control signal to the second switching device 120, so that the second power transmission line is disconnected, the power supply is stopped, and the user stops smoothly; if an abnormal situation such as a break fault in the low-voltage battery 170 or a failure of the power supply controller 150 occurs during the running process of the vehicle, the whole vehicle controller 140 can take over the power supply controller 150 to continuously control the second breaking device 120 by using the continuously output second control signal, so as to keep the second transmission line ON, so that the second transmission line can continue to work and the vehicle can temporarily run when the corresponding abnormal situation occurs to the vehicle, and more time is given to the user for adjusting the vehicle.

In the vehicle power supply device provided in this embodiment, when the vehicle controller 140 detects that the ON gear signal stops outputting the second control signal to the second switching device 120, the vehicle can be ensured to stop safely.

In an exemplary embodiment, the vehicle power supply device further includes a third power transmission line, the low-voltage battery 170 is connected to the third power transmission line, and the low-voltage battery 170 is further configured to supply power to the first electrical appliance 240 through the third power transmission line; the first electric appliance 240 is an electric appliance which does not need constant electricity; a third breaking device 210 for controlling the on-off of the third transmission line is arranged on the third transmission line;

the power supply controller 150 is connected to the third switching-off device 210, and is configured to output a third control signal to the third switching-off device 210 when the low-voltage battery 170 meets the corresponding power supply condition and the high-voltage power battery 160 meets the corresponding power supply condition; the third control signal is used for controlling the conduction of the third power transmission line.

Specifically, the vehicle power supply device further includes a third breaking device 210, as shown in fig. 2 and 3, where the power supply controller 150 is connected to the third breaking device 210, as shown in fig. 3, where the third breaking device 210 may be a relay, and the third breaking device 210 is connected to a third power transmission line, so as to control the on and off of the third power transmission line, and the third power transmission line supplies power to the first electric appliance 240.

Specifically, the first electrical device 240 may be an electrical device that does not require constant electricity, for example, the first electrical device 240 may be a high-voltage electrical device, in other words, the third switching device 210 may be used to conduct a power transmission line where the high-voltage electrical device is located, that is, a third power transmission line. Further, the first electrical appliance 240 may include a plurality of high voltage electrical appliances, such as a driving motor, a high voltage distribution board, an electric compressor, an on-vehicle charger, and the like.

The state information of the low voltage battery 170 includes, for example, a voltage of the low voltage battery, a current of the low voltage battery, and a temperature of the low voltage battery, for example, the low voltage battery 170 satisfying the corresponding power supply condition may be that the voltage of the low voltage battery is within a preset voltage range, the current of the low voltage battery is within a preset current range, and the temperature of the low voltage battery is simultaneously within a preset temperature range. The satisfaction of the corresponding power supply condition by the high-voltage power battery 160 may be that the operating state of the high-voltage power battery 160 is fault-free. When the low-voltage battery 170 meets the corresponding power supply condition and the high-voltage power battery 160 meets the corresponding power supply condition, the power supply controller 150 generates a third control signal and outputs the third control signal to the third switching device 210, the third switching device 210 is closed, the third power transmission line is further conducted, and the first electric appliance in the third power transmission line is powered to start to operate.

In practical application, before the vehicle starts, if the user needs electricity for the vehicle, the user can press the first ON-off device 110 by hand, after the first ON-off device 110 is closed, the first power transmission line where the power controller 150 is located is conducted, the power controller 150 enters into a working mode, the power controller 150 performs fault self-checking ON the low-voltage battery 170, after determining that the low-voltage battery 170 has no related fault, the second ON-off device 120 is controlled to be closed, the second power transmission line is conducted, the low-voltage battery 170 supplies electricity for the voltage conversion module 180 connected in the second power transmission line, and simultaneously supplies electricity for other low-voltage electric appliances such as the ignition lock 130 in the second power transmission line, when the power controller 150 detects an ON-gear signal, monitoring management ON the high-voltage power battery 160 is started, for example, the power controller 150 may determine whether the high-voltage power battery 160 meets the power supply condition by determining whether the high-voltage power battery 160 has alarm information within the second preset time period, if the high-voltage power battery 160 does not send alarm information within the second preset time period, it indicates that the high-voltage power battery 160 meets the power supply condition, at this time, the power controller 150 outputs a third control signal for controlling the third power breaking device 210 to be closed, the third power transmission line is turned ON, the power controller 150 controls the high-voltage power battery 160 to supply power to the first electrical appliance 240, such as a driving motor, a high-voltage power distribution board, an electric compressor, etc., it is further explained that, after the third power breaking device 210 is closed, the power supply object of the low-voltage battery 170 is a corresponding power supply controller of the first electrical appliance in the third power transmission line, etc., from a certain angle, the low voltage battery 170 begins to power the vehicle in its entirety.

In the vehicle power supply device provided in this embodiment, when both the low-voltage battery 170 and the high-voltage power battery 160 meet the corresponding power supply conditions, the power supply of the high-voltage electrical appliance is controlled again, so that the power supply safety is improved.

In an exemplary embodiment, the vehicle controller 140 is further connected to the third switching device 210, and when detecting the ON range signal of the ignition lock 130, the third switching device 210 outputs a fourth control signal; the fourth control signal is used for controlling the conduction of the third transmission line.

Specifically, the vehicle controller 140 is connected to the third switching device 210 and the third power transmission line, as shown in fig. 3, the third switching device 210 is connected to the power controller 150 through a third diode 211, the third switching device 210 is connected to the vehicle controller 140 through a fourth diode 212, the third diode 211 is used for preventing the current between the vehicle controller 140 and the third switching device 210 from flowing back to the power controller 150, and similarly, the fourth diode 212 is used for preventing the current between the power controller 150 and the third switching device 210 from flowing back to the vehicle controller 140. When the vehicle controller 140 detects the ON signal of the ignition lock 130, a fourth control signal is output to the third switching device 210 for controlling the third transmission line to be turned ON.

After the ON-level signal is generated, the power controller 150 and the vehicle controller 140 both detect the ON-level signal, and for the power controller 150, when the power controller 150 receives the ON-level signal, if the power battery 170 meets the corresponding power supply condition and the high-voltage power battery 160 meets the corresponding power supply condition, the power controller 150 outputs a third control signal to the third disconnection device 210 for controlling the conduction of the third power transmission line; for the vehicle controller 140, after the vehicle controller 140 receives the ON signal, a fourth control signal is output to the third switching device 210 for controlling the third transmission line to be turned ON. In the related art, the third power transmission line is further controlled by the third power interruption device 210, and the ON state signal indicates that the vehicle is in the driving process, at this time, once the power supply controller 150 fails, the third power transmission line is disconnected, and the non-low voltage electric appliances in the second power transmission line, such as the driving motor, etc., stop working, which may cause the whole vehicle to run away, so that the vehicle is very dangerous, and in order to prevent the situation, the invention concept of the vehicle power supply device provided in the embodiment is that the power supply controller 150 and the whole vehicle controller 140 simultaneously control the third power interruption device 210 to be closed, that is, the third power transmission line to be closed, so that once the power supply controller 150 fails in the driving process of the vehicle, the whole vehicle controller 140 can keep the third power transmission line to be closed by using the fourth control signal continuously output by the third power interruption device 210, so that the dual control functions of the power supply controller 150 and the whole vehicle controller 140 ON the third power transmission line can provide the power supply reliability of the vehicle device, and the safety in the driving process of the vehicle, and the driving safety of the vehicle in the driving process of adjusting the time for more users in the related abnormal situations occur in the driving process of the vehicle.

In an exemplary embodiment, as shown in fig. 2 and 3, the vehicle power supply apparatus further includes a fourth on-off device 220 and a fifth on-off device 230;

the second power transmission line is connected with a second electric appliance 250 through a fourth switching device 220 and is connected with a third electric appliance 260 through a fifth switching device 230; the ignition lock 130 is connected with the fourth switching device 220 and the fifth switching device 230, and is used for controlling the fourth switching device 220 and the fifth switching device 230 to be closed when the ON gear is set; the second electrical appliance 250 is driving-related control equipment, and can receive constant electricity of the second power transmission line when the fourth breaking device 220 is closed; the third electric appliance 260 is a non-driving related control device, and is capable of receiving normal electricity of the second electric transmission line when the fifth on-off device 230 is closed.

Specifically, the output end of the second power transmission line is connected to the second electrical apparatus 250 through the fourth switching device 220, meanwhile, the output end of the second power transmission line is connected to the third electrical apparatus 260 through the fifth switching device 230, and when the fourth switching device 220 is closed, the second electrical apparatus 250 is powered by the battery 170; when the fifth on-off device 230 is closed, the low voltage battery 170 powers the third electrical appliance 260. The second electrical apparatus 250 is a driving related control device, further, the second electrical apparatus 250 is a driving safety related control device, and the driving safety related control device and related control functions include: rearview mirror adjustment, combination meters, airbags, reverse imaging, headlamps, control power supplies of various control systems (control systems such as tire pressure systems, electric steering systems, antilock brake systems ABS, traction control systems TCS, etc.), and the like; the third electric appliance 260 is a non-driving related control device, and further, the third electric appliance 260 is a non-driving safety related control device or an electric appliance, such as an air conditioner blower, an electric heating defroster, and the like.

Specifically, when the second power transmission line is turned ON, the output end of the second power transmission line outputs normal electricity to the ignition lock 130 to supply power to the ignition lock 130, and when the ignition lock 130 is turned ON, the ignition lock 130 controls the fourth power transmission line 220 and the fifth power transmission line 230 to be turned ON, and then the corresponding power transmission lines from the output end of the second power transmission line to the second electric appliance 250 and the third electric appliance 260 are all turned ON, the low-voltage battery 170 outputs the first ON electricity to the second electric appliance 250 through the fourth power transmission line, and outputs the second ON electricity to the third electric appliance 260 through the fifth power transmission line 230. The fourth switching device 220 and the fifth switching device 230 may be relay switching devices, and when the second power supply line is turned on, the ignition lock 130 controls the fourth switching device 220 and the fifth switching device 230 to be turned on or off. The fourth breaking device 220 and the fifth breaking device 230 may be connected to the output terminal of the second power transmission line through respective fuses, and the use of the fuses may prevent damage to the corresponding power transmission line and the corresponding power consumer due to a short circuit fault.

In the related art, an electrical apparatus connected to an ON gear in the ignition lock 130, such as an ON-off device of other related control systems, is usually controlled by the same ON-off device circuit, so that when the ON-off device circuit fails, the ON-off device of the related control system cannot be normally used, driving accidents are very easy to cause, and driving safety cannot be guaranteed. In the embodiment, the fourth breaking device 220 and the fifth breaking device 230 are disposed at the output end of the second power supply line, when the second power transmission line is turned ON, the ignition lock 130 controls the fourth breaking device 220 and the fifth breaking device 230 to be closed when the second power transmission line is turned ON, and then the second power supply 250 and the third power supply 260 can be respectively powered by the second power supply line, wherein the second power supply 250 is a driving safety-related control device, and the third power supply 260 is a non-driving safety-related control device, so that the driving safety-related control device and the non-driving safety-related control device can be respectively controlled through different breaking device lines, if the breaking device line where the fifth breaking device 230 is located fails during driving, the power-down of the driving safety-related control device is not caused, the influence of the breaking device line failure ON driving safety is greatly reduced, and the driving safety of the electric vehicle is improved.

In an exemplary embodiment, the power supply controller 150 is further connected to an output terminal of the fifth on-off device 230, and is configured to monitor whether the fifth on-off device 230 outputs normal electricity of the second power transmission line, and if the fifth on-off device 230 does not output normal electricity of the second power transmission line, control the low-voltage battery 170 to enter the sleep mode.

Specifically, as shown in fig. 3, the output ends of the power controller 150 and the fifth ON-off device 230 are connected through the whole vehicle ON line 360, so that the power controller 150 can monitor whether the fifth ON-off device 230 outputs normal electricity of the second power transmission line through the whole vehicle ON line 360, and when the fifth ON-off device 230 does not output normal electricity, it indicates that the related electric appliance does not need to use the electricity again, and at this time, the power controller can control the battery 170 to enter the sleep mode.

In this embodiment, the power supply controller 150 is connected to the output end of the fifth on-off device 230, so that the power supply controller 150 can monitor whether the related electric appliance needs to use electricity, and when the related electric appliance does not need to use electricity again, the power supply controller controls the low-voltage battery 170 to enter the sleep mode, so that the electricity consumption energy of the vehicle can be saved.

In an exemplary embodiment, the state information of the low voltage battery 170 includes a voltage of the low voltage battery 170, a current of the low voltage battery 170, and a temperature of the low voltage battery 170; the power supply device of the vehicle further comprises a voltage acquisition module, a current acquisition module and a temperature acquisition module;

the power supply controller 150 is connected with the voltage acquisition module, the current acquisition module and the temperature acquisition module and is used for acquiring the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; whether the low-voltage battery 170 satisfies the power supply condition is determined based on the voltage of the low-voltage battery, the current of the low-voltage battery, and the temperature of the low-voltage battery.

Specifically, the voltage acquisition module, the current acquisition module and the temperature acquisition module are all arranged on the low-voltage battery 170, as shown in fig. 3, the voltage acquisition module is connected with the power supply controller 150 through the voltage acquisition wire harness 172, the current acquisition module is connected with the power supply controller 150 through the current acquisition wire harness 171, the temperature acquisition module is connected with the power supply controller 150 through the temperature acquisition wire harness 173, and thus after the power supply controller 150 enters into a working state, the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery can be acquired through the voltage acquisition module, the current of the low-voltage battery can be acquired through the current acquisition module, and the temperature of the low-voltage battery can be acquired through the temperature acquisition module, and whether the low-voltage battery 170 meets the power supply condition or not is judged based on state information of the low-voltage battery 170.

Specifically, the voltage acquisition module may include a voltage sensor, the current acquisition module may include a current sensor 174, and the temperature acquisition module may include a temperature sensor.

The vehicle power supply device provided in this embodiment, through setting up voltage acquisition module, current acquisition module and temperature acquisition module on low-voltage battery 170, can accurately detect the voltage of low-voltage battery, the electric current of low-voltage battery and the temperature of the voltage of low-voltage battery, realize the accurate detection to the state information of low-voltage battery 170.

The specific construction and operation of the power supply device for a vehicle according to the present invention will be described below with reference to an alternative embodiment. As shown in fig. 3, the vehicle power supply device in the present embodiment includes: the first transmission line, the second transmission line and the third transmission line.

In the first power transmission line, the first on-off device 110 is connected between the negative electrode of the power supply controller 150 and the positive electrode of the low-voltage battery 170, the positive electrode of the power supply of the low-voltage battery 170 is connected with the positive electrode of the low-voltage battery 170, the first power transmission line is formed, after the first on-off device is closed, the first power transmission line is conducted, the low-voltage battery 170 starts to supply power to the power supply controller 150, and the power supply controller 150 enters a working mode. The battery 170 may be, for example, a 24V battery.

In the second transmission line, the positive electrode of the low-voltage battery 170 is connected with the second switching device 120, the power supply controller 150 is connected with the second switching device 120 through the first diode 121, the power supply controller 150 can output a first control signal to the second switching device 120 for controlling the ON-off of the second transmission line, the whole vehicle controller 140 is connected with the second switching device 120 through the second diode 122, the whole vehicle controller 140 is also connected with the IG1 end and the IG2 end of the ignition lock 130 for detecting an ON-gear signal output by the ignition lock 130, when the whole vehicle controller 140 detects the ON-gear signal, the whole vehicle controller 140 can output a second control signal to the second switching device 120 for controlling the ON-off of the second transmission line, the first diode 121 is used for preventing the current between the whole vehicle controller 140 and the second switching device 120 from reversely flowing to the power supply controller 150, and the second diode 122 is used for preventing the current between the whole vehicle controller 150 and the second switching device 120 from reversely flowing to the whole vehicle controller 140; when the second switching device 120 is closed, the low voltage battery 170 outputs constant electricity through the first fuse 310 using the output terminals of the second power transmission line (i.e., the 24V positive output terminal and the 24V negative output terminal). The 24V positive output end of the second power transmission line is connected with the whole vehicle controller 140 through a fourth fuse 340 so as to supply power to the whole vehicle controller 140 when the second power transmission line is conducted; the 24V positive output end of the second power transmission line is connected with the ignition lock 130 through an ignition lock fuse 137 to supply power to the ignition lock 130 when the second power transmission line is conducted; the 24V positive output end of the second power transmission line is connected with the fourth breaking device 220 through the second fuse 320, so as to supply power to the fourth breaking device 220 when the second power transmission line is conducted; the 24V positive output end of the second power transmission line is connected with the fifth on-off device 230 through the third fuse 330, so as to supply power to the fifth on-off device 230 when the second power transmission line is conducted; the 24V positive output end of the second power transmission line is also connected with a sixth on-off device 270 to supply power to the sixth on-off device 270 when the second power transmission line is conducted; the 24V positive output of the second transmission line is connected to the voltage conversion module 180 to supply power to the voltage conversion module 180 when the second transmission line is on.

The IG1 end of the ignition LOCK 130 is connected to the first ON-off device, the IG1 end of the ignition LOCK 130 is also connected to the second ON-off device, so that when the ignition LOCK is turned ON from LOCK gear, the first ON-off device and the second ON-off device can be simultaneously controlled to be closed, in addition, the IG1 end of the ignition LOCK 130 is connected to the fourth ON-off device 220, the IG1 end of the ignition LOCK 130 is also connected to the fifth ON-off device 230, so that when the ignition LOCK is turned ON from LOCK gear, the fourth ON-off device 220 and the fifth ON-off device 230 can be simultaneously controlled to be closed, and the IG2 end of the ignition LOCK 130 is connected to the vehicle controller 140; the ACC end of the ignition lock 130 is connected to a sixth on-off device, and the B1 end and the B2 end (not labeled in the figure) of the ignition lock 105 are connected to the 24V positive output end of the second power transmission line through an ignition lock fuse 137, for receiving the constant electric output; when the ignition lock 130 is in an ACC gear, the sixth on-off device 270 is controlled to be closed, and the sixth on-off device 270 outputs ACC electricity for supplying power to an electric appliance corresponding to the sixth on-off device; when the ignition lock 130 is turned ON, the fourth switching-off device 220 and the fifth switching-ON device 230 are controlled to be closed, the fourth switching-off device 220 outputs first ON electricity for supplying power to the second electric appliance 250, and the fifth switching-ON device 230 outputs second ON electricity for supplying power to the third electric appliance 260; when the ignition lock 105 is in ST gear, a vehicle start signal is output through the ST end of the ignition lock 130 to start the engine.

The power controller 150 is further connected to the fifth ON/off device 230 through the vehicle ON line 360, and is configured to detect whether the fifth ON/off device 230 has a normal electrical output. The voltage conversion module 180 is connected to the high-voltage power battery 160 through a high-voltage input positive line and a high-voltage input negative line, and the power controller 150 converts the high-voltage output from the high-voltage power battery 160 into a target voltage, for example, 24V voltage to charge the high-voltage power battery 170 when recognizing that the low-voltage power battery 170 satisfies a charging condition; the voltage battery 170 is provided with a voltage sensor, a current sensor 174 and a temperature sensor (the voltage sensor and the temperature sensor are arranged inside the voltage battery 170 and are not shown in fig. 3), and the voltage conversion module 180 is respectively connected with the voltage sensor, the current sensor 174 and the temperature sensor through a voltage acquisition wire harness 172, a current acquisition wire harness 171 and a temperature acquisition wire harness 173 so as to acquire state information of the voltage battery 170; the voltage conversion module 180 is connected to an output end of the second power transmission line, on one hand, the voltage conversion module 180 is powered by the second power transmission line, and on the other hand, when the low-voltage battery 170 fails, the voltage conversion module 180 converts the output voltage of the high-voltage power battery 160 into 24V voltage to provide normal electricity for the vehicle.

In the third transmission line, the positive electrode of the low-voltage battery 170 is connected to the third switching device 210, the power supply controller 150 is connected to the third switching device 210 through the third diode 211, the power supply controller 150 can output a third control signal to the third switching device 210 for controlling the on-off of the second transmission line, the whole vehicle controller 140 is connected to the third switching device 210 through the fourth diode 212, the whole vehicle controller 140 can output a fourth control signal to the third switching device 210 for controlling the on-off of the second transmission line, the third diode 211 is used for preventing the current between the whole vehicle controller 140 and the third switching device 210 from flowing back to the power supply controller 150, and the fourth diode 212 is used for preventing the current between the power supply controller 150 and the third switching device 210 from flowing back to the whole vehicle controller 140. The output end of the third power transmission line is connected to the first electrical apparatus 240 through the fifth fuse 350, when the third breaking device 210 is closed, the third power transmission line is turned on, the low-voltage battery 170 supplies power to the corresponding power supply controller of the first electrical apparatus 240 in the third power transmission line, the high-voltage used by the first electrical apparatus 240 is supplied by the high-voltage power battery 160, and it should be explained that the fifth fuses 350 are collectively called as a plurality of fuses, each fifth fuse 350 is correspondingly connected to one first electrical apparatus 240, so the fusing current of each fifth fuse 350 is not identical, and the corresponding power transmission line corresponds to the first electrical apparatus 240.

The whole vehicle controller 140 is in communication connection with the voltage conversion module 180 through a CANH line and a CANL line in the CAN bus for data interaction; the whole vehicle controller 140 and the power supply controller 150 are also in communication connection with each other through a CANH line and a CANL line in the CAN bus for data interaction.

The operation flow of the vehicle power supply device is further described below with reference to fig. 4 and 5. As shown in fig. 4, when the vehicle needs electricity, the power on-off device of the low-voltage battery 170, that is, the first on-off device is pressed down by hand, the power controller 150 enters into the working mode, the power controller 150 performs self-checking on the low-voltage battery 170, if the low-voltage battery 170 has a fault, the fault lamp is turned on to prompt the fault, if the low-voltage battery 170 has no fault, the power controller 150 wakes up the voltage conversion module 180 through the CAN line, the voltage conversion module 180 performs self-checking, if the voltage conversion module 180 has a fault, the fault lamp is turned on to prompt the fault, if the voltage conversion module 180 has no fault, the power controller 150 collects the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery in real time, the power controller 150 controls the second on-off device 120 to be turned on, the second power transmission line is turned on, the low-voltage battery 170 performs normal-electric power distribution on the vehicle through the normal-electric output end, that is 24V positive output end and 24V negative output end, the ignition lock 130 is connected with normal-electric power distribution through the third fuse, and the ignition lock 130 performs normal-electric power supply on the ignition lock 130.

The ignition lock 130 includes different gear positions. The user can drive the ignition LOCK 130 from LOCK gear to ACC gear as needed, the ignition LOCK 130 controls the sixth on-off device 270 to be closed through hard wire, and the battery 170 supplies power to the infotainment device that is engaged in ACC gear.

The user switches the ignition LOCK 130 from the LOCK gear to the ON gear as required, the ignition LOCK 130 controls the fourth switching-off device 220 and the fifth switching-ON device 230 to be closed through a hard wire, the fourth switching-off device 220 is an IG1 relay, the fourth switching-off device 220 supplies first ON electricity to the driving safety related power supply controller, the fifth switching-ON device 230 is an IG2 relay, and the fifth switching-ON device 230 supplies second ON electricity to the non-driving safety related power supply controller; the power controller 150 detects an ON gear signal in real time, if the ON gear signal is not available, the low-voltage battery 170 is controlled to enter a sleep mode, if the ON gear signal is available, the power controller 150 starts monitoring management of the high-voltage power battery 160, collects and outputs relevant information of the high-voltage power battery 160, judges whether the high-voltage power battery 160 has a fault, an alarm signal is sent when the high-voltage power battery 160 has a fault and is used for removing the fault, and if the high-voltage power battery 160 has no fault, no alarm is given, at the moment, the power controller 150 controls a third switching-off device to be closed, and the low-voltage battery 170 starts to supply power to the whole vehicle; when the power controller 150 detects an ON-gear signal, the low-voltage battery 170 supplies power to the VCU through the fourth fuse 340, the VCU, that is, the vehicle control unit 140, also detects the ON-gear signal, after that, the VCU manages the vehicle control system of the vehicle, the VCU outputs a second control signal through the second diode 122 to control the second switching device 120 to be kept ON, when the power controller 150 fails, the VCU outputs a second control signal through the second diode 122 to continuously control the second switching device 120 to be kept ON, the VCU outputs a fourth control signal through the fourth diode 212 to continuously control the third switching device 210 to be kept ON, and when the low-voltage battery 170 fails, the voltage conversion module 180 replaces the low-voltage battery 170 to supply power to the vehicle in the vehicle.

As shown in fig. 5, when the low-voltage battery 170 supplies power to the entire vehicle, the power controller 150 calculates the remaining power of the low-voltage battery in real time according to the state information of the low-voltage battery, when the remaining power of the low-voltage battery is lower than 30% or when the discharging current of the low-voltage battery is greater than 20A, the power controller 150 activates the voltage conversion module 180 through hard wire control, after the voltage conversion module 180 is activated, the high-voltage output by the high-voltage power battery 160 is converted into the target voltage through the voltage conversion module 180 to charge the low-voltage battery 170, and when the remaining power of the low-voltage battery is greater than or equal to 95%, the charging is stopped; when the power controller 150 does not detect the ON range signal for more than 5 seconds, the power controller 150 controls the low-voltage battery 170 to enter the sleep mode again, and the low-voltage battery 170 only performs constant-voltage output; when the vehicle is parked for a long time, the user presses the power on-off device of the low-voltage battery 170 for a long time, the low-voltage battery 170 is not powered any more, the power controller 150 stops working, and the power consumption of the vehicle is finished.

The vehicle power supply method provided by the invention will be described below, and the vehicle power supply method described below and the vehicle power supply device described above may be referred to correspondingly to each other.

The embodiment of the invention also provides a vehicle power supply method based on the vehicle power supply device provided by any embodiment, which comprises the following steps:

Step 610, the power controller 150 enters a working mode when the first on-off device 110 is connected to the first power transmission line, and outputs a first control signal to the second on-off device 120 if the corresponding power supply condition is satisfied by the low voltage battery 170; if the high-voltage power battery 160 meets the corresponding power supply condition, based on the state information of the low-voltage battery 170, the control voltage conversion module 180 converts the voltage of the high-voltage power battery 160 into a target voltage to charge the low-voltage battery 170; the first control signal is used for controlling the conduction of the second transmission line;

step 620, when the vehicle controller 140 detects an ON signal of the ignition lock 130 when the second power transmission line is turned ON, outputting a second control signal to the second switching device 120; the second control signal is used for controlling the conduction of the second power transmission line.

In an exemplary embodiment, when the vehicle controller 140 does not detect the ON range signal of the ignition lock 130, the output of the second control signal to the second switching device 120 is stopped.

In the exemplary embodiment, battery 170 is also configured to power first appliance 240 via a third power transmission line; the first electric appliance 240 is an electric appliance which does not need constant electricity;

the vehicle power supply device further includes: a third switching device 210;

The third disconnection device 210 is disposed on the third power transmission line, and is used for controlling the on-off of the third power transmission line;

the power supply controller 150 is connected to the third switching-off device 210, and when the low-voltage battery 170 meets the corresponding power supply condition and the high-voltage power battery meets the corresponding power supply condition, the power supply controller 150 outputs a third control signal to the third switching-off device 210; the third control signal is used for controlling the conduction of the third power transmission line.

In an exemplary embodiment, the vehicle controller 140 is further connected to the third switching-off device 210, and when the vehicle controller 140 detects the ON range signal of the ignition lock 130, a fourth control signal is output to the third switching-off device 210; the fourth control signal is used for controlling the conduction of the third transmission line.

the voltage conversion module 180 is connected with a standby power supply, and the voltage conversion module 180 supplies power to the voltage conversion module 180 when the voltage battery 170 has an open circuit fault;

the power controller 150 also controls the voltage conversion module 180 to replace the power of the low-voltage battery 170 when the low-voltage battery 170 fails to break.

In the exemplary embodiment, the vehicle power supply apparatus further includes a fourth on-off device 220 and a fifth on-off device 230;

The second power transmission line is connected with a second electric appliance 250 through a fourth switching device 220 and is connected with a third electric appliance 260 through a fifth switching device 230; the ignition lock 130 is connected with the fourth switching-off device 220 and the fifth switching-ON device 230, and when the ignition lock 130 is in an ON gear, the fourth switching-off device 220 and the fifth switching-ON device 230 are controlled to be closed; the second electrical appliance 250 is driving-related control equipment, and can receive constant electricity of the second power transmission line when the fourth breaking device 220 is closed; the third electric appliance 260 is a non-driving related control device, and is capable of receiving normal electricity of the second electric transmission line when the fifth on-off device 230 is closed.

In an exemplary embodiment, the power controller 150 is further connected to the output terminal of the fifth on-off device 230, and the power controller 150 monitors whether the fifth on-off device 230 outputs the normal power of the second power transmission line, and if the fifth on-off device 230 does not output the normal power of the second power transmission line, controls the low-voltage battery 170 to enter the sleep mode.

In an exemplary embodiment, the state information of the low voltage battery includes a voltage of the low voltage battery, a current of the low voltage battery, and a temperature of the low voltage battery; the power supply device of the vehicle further comprises a voltage acquisition module, a current acquisition module and a temperature acquisition module;

the power supply controller 150 is connected with the voltage acquisition module, the current acquisition module and the temperature acquisition module, and the power supply controller 150 acquires the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; whether the low-voltage battery 170 satisfies the power supply condition is determined based on the voltage of the low-voltage battery, the current of the low-voltage battery, and the temperature of the low-voltage battery.

The embodiment of the invention also provides a vehicle, which comprises the vehicle power supply device provided by any embodiment, or is used for executing the vehicle power supply method provided by any embodiment.

In the present embodiment, the vehicle may be a pure electric vehicle, a hybrid electric vehicle, and an electric work machine such as an electric hoist, an electric excavator, or the like.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle power supply apparatus, characterized by comprising: the power supply controller, the high-voltage power battery, the low-voltage battery and the voltage conversion module are integrated in the same box body; the vehicle control system also comprises an ignition lock, a vehicle controller, a first power transmission line and a second power transmission line;

2. The vehicle power supply apparatus according to claim 1, further comprising a backup power source;

3. The vehicle power supply of claim 2, wherein the backup power source includes an inductance and a capacitance.

4. The vehicle power supply apparatus according to claim 1, wherein the vehicle controller is configured to stop outputting the second control signal to the second switching device when the ON range signal of the ignition lock is not detected.

5. The vehicle power supply apparatus according to claim 1, characterized by further comprising a third power transmission line; the low-voltage battery is connected with the third power transmission line and is also used for supplying power to the first electric appliance through the third power transmission line; the first electric appliance is an electric appliance which does not need constant electricity; a third disconnection device for controlling the on-off of the third transmission line is arranged on the third transmission line;

6. The vehicle power supply apparatus according to claim 5, wherein the vehicle controller is further connected to the third switching-off device, and is configured to output a fourth control signal to the third switching-off device when an ON-range signal of the ignition lock is detected; and the fourth control signal is used for controlling the conduction of the third power transmission line.

7. The vehicle power supply apparatus according to claim 1, characterized in that the state information of the low-voltage battery includes a voltage of the low-voltage battery, a current of the low-voltage battery, and a temperature of the low-voltage battery; the vehicle power supply device further comprises a voltage acquisition module, a current acquisition module and a temperature acquisition module;

8. A vehicle power supply method based on the vehicle power supply apparatus according to any one of claims 1 to 7, characterized by comprising:

9. The vehicle power supply method according to claim 8, characterized by further comprising:

10. A vehicle characterized by comprising the vehicle power supply apparatus according to any one of claims 1 to 7, or for performing the vehicle power supply method according to claim 8 or 9.