Vehicle power supply device, power supply method, and vehicle

Abstract

The present invention relates to the field of vehicles and provides a vehicle power supply device, power supply method, and vehicle. The vehicle power supply device includes a first transmission line, a second transmission line, an ignition lock, a vehicle controller, and a power supply controller, a high-voltage power battery, a low-voltage battery, and a voltage conversion module integrated into the same housing. The first transmission line is provided with a first on-off device; the second transmission line is provided with a second on-off device. When the first on-off device switches on the first transmission line, the power supply controller outputs a first control signal to the second on-off device for controlling the conduction of the second transmission line, and controls the voltage conversion module to charge the low-voltage battery based on the status information of the low-voltage battery. When the second transmission line is switched on and the vehicle controller detects the ignition lock's ON position signal, it outputs a second control signal to the second on-off device for controlling the conduction of the second transmission line. This solves the problem of low safety and reliability of vehicle power supply, thereby improving reliability and safety.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle power supply device, a power supply method and a vehicle. Background Art

[0002] The high-voltage power battery, low-voltage battery and voltage conversion module in the vehicle's power supply system play an important role in the vehicle. The high-voltage power battery provides power for the vehicle. When the vehicle is driving, the high-voltage power battery supplies power to the low-voltage battery and other electrical appliances through the voltage conversion module.

[0003] However, in the related art, the power supply safety and reliability of the vehicle when it is powered on has always been an urgent problem to be solved in this field. Summary of the Invention

[0004] The present invention provides a vehicle power supply device, a power supply method and a vehicle, which are used to solve the problem of low power supply safety and reliability when the vehicle is powered on in the prior art, and to improve the power supply safety and reliability when the vehicle is powered on.

[0005] The present invention also provides a vehicle power supply device, comprising: a power controller, a high-voltage power battery, a low-voltage battery, and a voltage conversion module integrated in the same box; an ignition lock, a vehicle controller, a first power transmission line, and a second power transmission line;

[0006] The low-voltage battery is connected to the first power transmission line for supplying power to the power 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;

[0007] The low-voltage battery is connected to the second power transmission line for providing normal power; the voltage conversion module is powered by the second power transmission line; the second power transmission line is provided with a second on-off device for controlling the on-off of the second power transmission line;

[0008] The power controller is configured to enter an operating mode when the first on-off device switches on the first power transmission line, and output a first control signal to the second on-off device if the low-voltage battery meets the corresponding power supply condition; and control the voltage conversion module to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the status information of the low-voltage battery if the high-voltage power battery meets the corresponding power supply condition; the first control signal is used to control the switching on of the second transmission line;

[0009] The vehicle controller is respectively connected to the second power transmission line, the second on-off device and the ignition lock, and is used to output a second control signal to the second on-off device when the second transmission line is turned on and the ON gear signal of the ignition lock is detected; the second control signal is used to control the conduction of the second transmission line.

[0010] A vehicle power supply device according to the present invention further includes a backup power supply;

[0011] The voltage conversion module is connected to the backup power supply and is used to supply power to the voltage conversion module when a circuit breaker fault occurs in the low-voltage battery;

[0012] The power controller is further configured to control the voltage conversion module to supply power in place of the low-voltage battery when a short-circuit fault occurs in the low-voltage battery.

[0013] According to a vehicle power supply device provided by the present invention, the backup power supply includes an inductor and a capacitor.

[0014] According to a vehicle power supply device provided by the present invention, the vehicle controller is configured to stop outputting the second control signal to the second on-off device when the vehicle controller fails to detect the ON gear signal of the ignition lock.

[0015] According to the present invention, a vehicle power supply device further includes a third power transmission line; the low-voltage battery is connected to the third power transmission line and is further configured to supply power to a first electrical appliance via the third power transmission line; the first electrical appliance is an electrical appliance that does not require constant power; and the third power transmission line is provided with a third on-off device for controlling the on-off of the third power transmission line.

[0016] The power supply controller is connected to the third on-off device and is used to output a third control signal to the third on-off device when the low-voltage battery meets the corresponding power supply conditions and the high-voltage power battery meets the corresponding power supply conditions; the third control signal is used to control the conduction of the third transmission line.

[0017] According to a vehicle power supply device provided by the present invention, the vehicle controller is also connected to the third on-off device, and is used to output a fourth control signal to the third on-off device when detecting the ON gear signal of the ignition lock; the fourth control signal is used to control the conduction of the third power transmission line.

[0018] According to a vehicle power supply device provided by the present invention, the status information of the low-voltage battery includes 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 also includes a voltage acquisition module, a current acquisition module and a temperature acquisition module;

[0019] The voltage acquisition module is used to acquire the voltage of the low-voltage battery;

[0020] The current acquisition module is used to acquire the current of the low-voltage battery;

[0021] The temperature acquisition module is used to collect the temperature of the low-voltage battery;

[0022] The power supply controller is connected to the voltage acquisition module, the current acquisition module and the temperature acquisition module, and is used to obtain the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; based on the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery, determine whether the low-voltage battery meets the corresponding power supply conditions.

[0023] The present invention further provides a vehicle power supply method based on any of the above vehicle power supply devices, comprising:

[0024] The power controller enters an operating mode when the first on-off device switches on the first power transmission line. If the low-voltage battery meets the corresponding power supply conditions, the power controller outputs a first control signal to the second on-off device. If the high-voltage power battery meets the corresponding power supply conditions, the power controller controls the voltage conversion module to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the status information of the low-voltage battery. The first control signal is used to control the conduction of the second transmission line.

[0025] When the second power transmission line is turned on, the vehicle controller outputs a second control signal to the second on-off device when it detects the ON gear signal of the ignition lock; the second control signal is used to control the conduction of the second power transmission line.

[0026] A vehicle power supply method according to the present invention further includes:

[0027] When the vehicle controller does not detect the ON gear signal of the ignition lock, it stops outputting the second control signal to the second on-off device.

[0028] The present invention also provides a vehicle, comprising any one of the above-mentioned vehicle power supply devices, or used to execute any one of the above-mentioned vehicle power supply methods.

[0029] The vehicle power supply device, power supply method and vehicle provided by the present invention integrate the voltage conversion module and the high-voltage power battery in the same box. In this way, as long as the box of the high-voltage power battery pack is not disassembled, even if the vehicle is repaired while charging, the high-voltage wires between the voltage conversion module and the high-voltage power battery will not be exposed to cause harm to the human body, thereby ensuring the safety of vehicle maintenance during the charging process. In this way, the power supply safety of the vehicle and the safety of the entire vehicle are also improved; in addition, the vehicle controller also has the same control function for the second transmission line as the power controller. If the power controller fails during vehicle driving, the vehicle controller continues to control the conduction of the second transmission line. In this way, such dual control functions can improve the power supply reliability of the vehicle power supply device, while giving users more time to adjust the vehicle, ensuring the power supply safety and driving safety of the vehicle during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is one of the structural diagrams of the vehicle power supply device provided by an embodiment of the present invention;

[0032] Figure 2 This is the second structural diagram of the vehicle power supply device provided by an embodiment of the present invention;

[0033] Figure 3 is a circuit diagram of a vehicle power supply device provided by an embodiment of the present invention;

[0034] Figure 4 This is one of the working process diagrams of the vehicle power supply device provided by an embodiment of the present invention;

[0035] Figure 5 This is the second working flow diagram of the vehicle power supply device provided by the embodiment of the present invention;

[0036] Figure 6 is a flow chart of a vehicle power supply method provided by an embodiment of the present invention;

[0037] Reference numerals:

[0038] 100: box; 110: first switching device; 120: second switching device; 121: first diode; 122: second diode;

[0039] 130: Ignition lock; 131: LOCK position; 132: ACC position; 133: ON position; 134: ST position; 135: IG1 position; 136: IG2 position; 137: Ignition lock fuse;

[0040] 140: Vehicle controller; 150: Power controller; 160: High-voltage power battery;

[0041] 170: low-voltage battery; 171: current acquisition harness; 172: voltage acquisition harness; 173: temperature acquisition harness; 174: current sensor;

[0042] 180: voltage conversion module;

[0043] 210: third switching device; 211: third diode; 212: fourth diode;

[0044] 220: fourth on-off device; 230: fifth on-off device;

[0045] 240: first electrical appliance; 250: second electrical appliance; 260: third electrical appliance;

[0046] 270: sixth on-off device;

[0047] 310: first fuse; 320: second fuse; 330: third fuse; 340: fourth fuse; 350: fifth fuse;

[0048] 360: vehicle ON line; DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0050] 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 contains a high-voltage power lithium battery, a high-voltage battery control board, a cooling structure, etc. The low-voltage battery pack contains a low-voltage battery and a low-voltage battery control board, and the low-voltage battery pack does not contain a cooling structure. The all-in-one module integrated with a voltage conversion module contains not only a voltage conversion module, but also an oil pump, an air pump, a high-voltage distribution board, a voltage conversion module control board, a CAN module, etc., and the all-in-one module does not contain a cooling structure. However, in the related art, when the user parks the vehicle to charge, if the vehicle needs to be repaired 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 during the vehicle charging process is prone to cause safety accidents. This situation indicates that the safety and reliability of the vehicle power supply when the vehicle is powered on are low.

[0051] In order to solve the problem of low safety and reliability when the vehicle is powered on in the related art, the present invention provides a vehicle power supply device, which can be applied to vehicles such as electric vehicles and electric working machinery that require high-voltage power batteries and low-voltage batteries for power supply.

[0052] Now combined Figures 1 to 5 , various embodiments of the vehicle power supply device provided by the present invention are described. It should be understood that the following are merely exemplary embodiments of the present invention and do not constitute any particular limitation to the present invention.

[0053] The embodiment of the present invention provides a vehicle power supply device, such as Figures 1 to 3 As shown, it includes: 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 box; it also includes an ignition lock 130, a vehicle controller 140, a first transmission line and a second transmission line;

[0054] The low-voltage battery 170 is connected to the first power transmission line and is used to supply power to the power 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;

[0055] The low-voltage battery 170 is connected to the second transmission line for providing normal power; the voltage conversion module 180 is powered by the second transmission line; the second transmission line is provided with a second on-off device 120 for controlling the on-off of the second transmission line;

[0056] The power controller 150 is configured to enter an operating mode when the first on-off device 110 turns on the first power transmission line. If the low-voltage battery 170 meets the corresponding power supply conditions, the power controller 150 outputs a first control signal to the second on-off device 120. If the high-voltage power battery 160 meets the corresponding power supply conditions, the power controller 150 controls the voltage conversion module 180 to convert the voltage of the high-voltage power battery 160 into a target voltage based on the status information of the low-voltage battery 170 to charge the low-voltage battery 170. The first control signal is used to control the conduction of the second transmission line.

[0057] The vehicle controller 140 is respectively connected to the second power transmission line, the second on-off device 120 and the ignition lock 130, and is used to output a second control signal to the second on-off device 120 when the second transmission line is turned on and the ON gear signal of the ignition lock 130 is detected; the second control signal is used to control the conduction of the second transmission line.

[0058] It should be noted that the vehicle power supply device provided by the embodiment of the present invention changes the setting position of the low-voltage battery in the vehicle in the related art, and can cancel the original low-voltage battery pack, and integrate the low-voltage battery and high-voltage power battery in the original low-voltage battery pack into the same box 100. In this way, the battery frame, battery cover and related accessories of the original low-voltage battery pack can be eliminated, thereby reducing costs. Furthermore, the setting position of the voltage conversion module in the related art is changed, and the setting of the voltage conversion module in the original multi-in-one module can be canceled, and the voltage conversion module 180 is also integrated into the same box 100. In this way, the high-voltage wiring harness from the high-voltage power battery to the high-voltage distribution board and from the high-voltage distribution board to the voltage conversion module in the original multi-in-one module can be eliminated. At the same time, the low-voltage wiring harness from the voltage conversion module in the original multi-in-one module to the positive and negative poles of the low-voltage battery can be eliminated. In this embodiment, the connection between the low-voltage battery 170 and the voltage conversion module can be achieved through a copper bus, further reducing costs. In addition, in the related art, the low-voltage battery and the voltage conversion module of the vehicle are connected through a 25-square power cable. The longer power cable leads to higher wiring harness costs and heavier weight of the power cable. Moreover, since the power cable has high requirements for dust and water resistance, this connection method of the low-voltage battery and the voltage conversion module of the vehicle in the related art cannot guarantee the reliability of low-voltage battery charging. In this embodiment, the low-voltage battery 170 and the voltage conversion module 180 are integrated in the same box 100, and the connection between the low-voltage battery 170 and the voltage conversion module 180 can be achieved through the copper busbar, thereby effectively reducing the cost and weight of the electric vehicle.

[0059] It should be noted that the same box 100 can be a battery box for an existing high-voltage power battery pack in the related art. In this way, the low-voltage battery 170 and the voltage conversion module 180 can be installed in the empty space of the existing high-voltage power battery pack battery box. The same box 100 can also be a non-standard new battery box made by integrating the high-voltage power battery 160, the low-voltage battery 170, and the voltage conversion module 180. Furthermore, the battery pack containing the same box 100 is installed as close to the vehicle frame as possible to minimize the low-voltage line.

[0060] Specifically, the voltage conversion module 180 is connected to the high-voltage power battery 160 and the low-voltage battery 170, respectively. For example, within the same housing 100, the high-voltage power battery 160 and the voltage conversion module 180 can be connected via a high-voltage positive input line and a high-voltage negative input line. The low-voltage battery 170 is used to power the voltage conversion module 180 and the vehicle's low-voltage electrical appliances. For example, the low-voltage battery 170 can be a 24V low-voltage lithium battery. The high-voltage power battery 160 provides a power source for the electric vehicle. When the high-voltage power battery 160 meets the power supply requirements, the voltage conversion module 180 converts the high-voltage voltage output by the high-voltage power battery 160 to the target voltage required by the low-voltage battery 170, thereby charging the low-voltage battery 170. In addition, the power controller 150 and the voltage conversion module 180 can communicate via an internal CANH line and an internal CANL line, allowing data exchange between the power controller 150 and the voltage conversion module 180.

[0061] Specifically, the vehicle power supply device further includes a first on-off device 110 and a second on-off device 120. Figure 1 、 Figure 2 and Figure 3As shown, the first on-off device 110 is connected to the power controller 150 and the low-voltage battery 170 respectively. 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 transmission line. Therefore, after the user presses the first on-off device 110, the first transmission line is turned on, and the low-voltage battery 170 can start supplying power to electrical appliances in the first transmission line, such as the power controller 150. In this way, the power controller 150 starts to enter the working mode after being powered. After the power controller 150 enters the working mode, it can detect whether the low-voltage battery 170 meets the power supply conditions. For example, it can determine whether the low-voltage battery 170 meets the power supply conditions by detecting the status information of the low-voltage battery 170. For example, the status information of the low-voltage battery 170 may include the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery. For example, the low-voltage battery 170 meets the power supply conditions when 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. When it is determined that the low-voltage battery 170 meets the power supply conditions, the power controller 150 generates a first control signal to control the second on-off device 120 to close, thereby turning on the second transmission line. Since the voltage conversion module 180 is powered by the second power transmission line, after the second on / off device 120 is closed, the low-voltage battery 170 supplies power to the voltage conversion module 180 connected to the second power transmission line, ensuring the normal operation of the voltage conversion module 180. Simultaneously, the low-voltage battery 170 supplies power to low-voltage electrical appliances connected to the second power transmission line, such as the ignition lock 130, the lighting system, and the air conditioning control system. It should be noted that the power controller 150 continuously monitors the status of the low-voltage battery 170 in real time while in operating mode.Under the corresponding conditions, the power controller 150 can also determine that the high-voltage power battery 160 meets the power supply conditions by detecting that the operating status of the high-voltage power battery 160 is fault-free. When both the high-voltage power battery 160 and the low-voltage battery 170 meet the power supply conditions, the remaining power of the low-voltage battery 170 is calculated by detecting the status information of the low-voltage battery 170 in real time, and whether the low-voltage battery 170 meets the charging conditions, that is, whether the low-voltage battery 170 needs to be charged, is determined according to the remaining power. If the low-voltage battery 170 meets the charging conditions, the voltage conversion module 180 is controlled to output the high voltage power battery 160. The low-voltage voltage is converted into the target voltage required by the low-voltage battery 170 to charge the low-voltage battery 170. For example, when the remaining power of the low-voltage battery 170 is less than 30%, the remaining power is low at this time. The power controller 150 can control the voltage conversion module 180 to charge the low-voltage battery 170. In other words, the low-voltage battery 170 is only charged when it meets the charging conditions. When the low-voltage battery 170 does not meet the charging conditions, there is no need to charge the low-voltage battery 170. This not only saves the power consumption of the low-voltage battery 170, but also increases the service life of the low-voltage battery 170.

[0062] Furthermore, if Figure 3 As shown, the second on-off device 120 can be a relay comprising a normally open contact and a coil. When the power controller 150 controls the relay to close, it first energizes the relay coil. This energization of the relay coil attracts the normally open contact from an open state to a closed state. Once the normally open contact closes, the second on-off device 120 closes, thereby connecting the second power transmission line and allowing the low-battery to provide regular power. This utilizes the relay's temperature and pressure resistance, ensuring it is not limited by low operating temperatures and is less susceptible to breakdown under high voltages. This improves the efficiency and safety of the vehicle power supply device's power supply process.

[0063] Specifically, if Figure 1 、 Figure 2 and Figure 3 As shown, the vehicle power supply device also includes a vehicle controller 140 and an ignition lock 130. Figure 3As shown, the ignition lock 130 has four positions: LOCK 131, ACC 132, ON 133, and ST 134. ON 133 is simultaneously connected to IG1 135 and IG2 136. When the ignition lock 130 is in ON 133, it is equivalent to simultaneously being in IG1 135 and IG2 136, indicating that the vehicle is in full power mode. A vehicle controller 140 is connected to the ignition lock 130, and the second on / off device 120 is connected to the second power transmission line. When the ignition lock 130 is in ON position, an ON signal is generated, which can be detected by the vehicle controller 140. In actual application, before the ON gear signal is generated, if the user needs electricity for the vehicle, he can manually press the first on-off device 110 connected to the low-voltage battery 170. After the first on-off device 110 is closed, the first transmission line where the power controller 150 is located is connected, and the power controller 150 enters the working mode. After the power controller 150 starts working, it detects the status information of the low-voltage battery 170. When the low-voltage battery 170 meets the corresponding power supply conditions, the power controller 150 outputs a first control signal to the second on-off device 120. The second on-off device 120 is closed, and the second transmission line where the second on-off device 120 is located is connected. The low-voltage battery 170 starts to supply power to the voltage conversion module 180 connected to the second transmission line, and at the same time provides normal power to other low-voltage electrical appliances in the second transmission line, such as the ignition lock 130.

[0064] After the ON gear signal is generated, the vehicle controller 140 detects the ON gear signal. At this time, the vehicle controller 140 outputs a second control signal to the second on-off device 120 to control the second power transmission line to remain on. Figure 3As shown, the second on-off device 120 and the power controller 150 are connected via a first diode 121, and the second on-off device 120 and the vehicle controller 140 are connected via a second diode 122. The first diode 121 is used to prevent the current between the vehicle controller 140 and the second on-off device 120 from flowing back to the power controller 150. Similarly, the second diode 122 is used to prevent the current between the power controller 150 and the second on-off device 120 from flowing back to the vehicle controller 140. The reason why the conduction of the second transmission line is designed to be controlled simultaneously by the power controller 150 and the vehicle controller 140 through their respective on-off device control lines is because in the relevant technology, the control of the second on-off device 120 is only controlled by a single on-off device control line. Once the single on-off device control line is disconnected, the second transmission line cannot be turned on, and the power supply reliability of the vehicle is very low. For example, when the vehicle is in the process of driving, if the power controller 150 fails, the second transmission line is disconnected, and the voltage conversion module 180 stops working due to power failure. Other low-voltage electrical appliances in the second transmission line, such as the ignition lock 130, the power controller 150 of the drive motor, and other power controllers 150, will also stop working due to power failure. In this way, a sudden power failure of the vehicle during driving will cause the entire vehicle to lose control, which is very dangerous.

[0065] In order to prevent this situation from happening, the vehicle power supply device in this embodiment is designed to simultaneously control the closing of the second on-off device 120, that is, the conduction of the second transmission line, by the power controller 150 and the vehicle controller 140. In this way, during the driving of the vehicle, once the power controller 150 fails, the vehicle controller 140 can use the second control signal it continuously outputs to the second on-off device 120 to maintain the conduction of the second transmission line, which can ensure that the second transmission line continues to work and the vehicle can be temporarily operated, giving the user more time to adjust the vehicle. In this way, the power controller 150 and the vehicle controller 140 realize dual control functions on the second transmission line, thereby improving the reliability of the second transmission line in supplying power to the vehicle, and at the same time ensuring the power supply safety and driving safety during driving.

[0066] The vehicle power supply device provided in this embodiment has many beneficial effects. First, in the related art, the voltage conversion module is arranged in the original multi-in-one module. When the user parks the vehicle to charge, if there is a need to repair 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 during the vehicle charging process is prone to cause safety accidents. In the power supply device of this embodiment, since the voltage conversion module 180 and the high-voltage power battery 160 are integrated in the same box 100, even if the vehicle is repaired during the charging process, it will not cause harm to the human body. In this way, the power supply safety of the vehicle power supply device and the safety of the entire vehicle are improved; second, the vehicle controller 140 also has the same control function for the second transmission line as the power controller 150. If an abnormal situation such as a circuit breaker fault in the low-voltage battery 170 or failure of the power controller 150 occurs during the driving of the vehicle, the vehicle controller 140 takes over the temporary operation of the second transmission line. In this way, such a dual control function can improve the vehicle power supply device. The power supply reliability is improved, and the user is given more time to adjust the vehicle, which ensures the power supply safety and driving safety of the vehicle during driving; thirdly, the low-voltage battery 170 and the high-voltage power battery 160 are integrated into the same box 100, which can save the battery frame, battery cover and related accessories of the original low-voltage battery pack, thereby achieving the first layer of cost and weight reduction, saving installation space, reducing the assembly process and reducing the assembly cost; fourthly, the voltage conversion module in the original all-in-one module in the related art and the high-voltage power battery and low-voltage battery are integrated into the same In a box 100, the high-voltage wiring harness diameters from the high-voltage power battery 160 to the high-voltage distribution board and from the high-voltage distribution board to the voltage conversion module 180 in the original all-in-one module can be eliminated. At the same time, the low-voltage wiring harness diameters from the voltage conversion module 180 in the original all-in-one module to the positive and negative poles of the low-voltage battery 170 can be eliminated. The connection between the low-voltage battery 170 and the voltage conversion module 180 can be achieved through the copper busbar, which not only improves reliability, but also achieves the second level of cost and weight reduction. The weight reduction promotes the lightweighting of the vehicle, and the lightweighting of the vehicle can improve the overall performance of the vehicle.

[0067] In an exemplary embodiment, the vehicle power supply further includes a backup power source;

[0068] The voltage conversion module 180 is connected to the backup power supply and is used to supply power to the voltage conversion module 180 when a circuit breaker fault occurs in the low-voltage battery 170;

[0069] The power controller 150 is further configured to control the voltage conversion module 180 to replace the low-voltage battery 170 in supplying power when a circuit breaker fault occurs in the low-voltage battery 170 .

[0070] Specifically, the vehicle power supply device also includes a backup power supply. Exemplarily, the backup power supply includes an inductor and a capacitor. The backup power supply is composed of a capacitor and an inductor and can store electricity. When a short circuit fault occurs in the low-voltage battery 170, at the moment the short circuit fault occurs, the backup power supply can continue to supply power to the voltage conversion module 180 to ensure the normal operation of the voltage conversion module 180. At the same time, the power controller 150 can continue to maintain a communication connection with the voltage conversion module 180 through the CANL line and the CANH line, thereby controlling the voltage conversion module 180 to continue to replace the low-voltage battery 170 to supply power to the corresponding electrical appliances in the corresponding transmission line.

[0071] The vehicle power supply device provided in this embodiment further improves the reliability and safety of the vehicle's power use by providing a backup power supply to the voltage conversion module 180 .

[0072] In an exemplary embodiment, the vehicle controller 140 is configured to stop outputting the second control signal to the second on / off device 120 when the ON gear signal of the ignition lock 130 is not detected.

[0073] Specifically, the presence of the ON gear signal indicates that the vehicle is in the process of driving. After the vehicle controller 140 enters the working state, it has been detecting the ON gear signal sent by the ignition lock 130 in real time. Figure 2 and Figure 3As shown, the power controller 150 is also connected to the ignition lock 130, so that the power controller 150 can also always detect the ON gear signal in the working mode. In this way, when the vehicle is in motion, both the power controller 150 and the vehicle controller 140 can detect the ON gear signal. If the vehicle is driving normally, if the vehicle controller 140 cannot detect the ON gear signal within the first preset time, it indicates that the user is about to stop the car. At this time, the vehicle controller 140 no longer outputs the second control signal to the second on-off device 120. At the same time, the power controller 150 also stops outputting the first control signal to the second on-off device 120, and then the second power transmission line is disconnected, the power supply is stopped, and the user parks the car smoothly. If an abnormal situation such as a short circuit fault in the low-voltage battery 170 or failure of the power controller 150 occurs during vehicle driving, the vehicle controller 140 can take over the power controller 150 and use the continuously output second control signal to continue to control the second on-off device 120. Continue to control and keep the second power transmission line conductive. This can ensure that the second power transmission line can continue to work and the vehicle can be temporarily operated when a corresponding abnormal situation occurs in the vehicle, giving the user more time to adjust the vehicle. In this case, once the vehicle controller 140 does not detect the ON gear signal of the ignition lock 130 within the first preset time period, it means that the user has safely parked the car. At this time, the vehicle controller 140 stops outputting the second control signal to the second on-off device 120. Further, the second on-off device 120 is disconnected, the second power transmission line is disconnected, the vehicle power supply device stops supplying power, and the vehicle's power consumption ends. In this way, the power supply safety and the safety of the vehicle are guaranteed.

[0074] The vehicle power supply device provided in this embodiment can ensure safe parking of the vehicle when the vehicle controller 140 detects the ON gear signal and stops outputting the second control signal to the second on-off device 120.

[0075] In an exemplary embodiment, the vehicle power supply device further includes a third power transmission line, to which a low-voltage battery 170 is connected. The low-voltage battery 170 is also used to power a first electrical appliance 240 via the third transmission line; the first electrical appliance 240 is an electrical appliance that does not require constant power. The third transmission line is provided with a third on-off device 210 for controlling the on-off of the third transmission line.

[0076] The power controller 150 is connected to the third on-off device 210 and is used to output a third control signal to the third on-off device 210 when the low-voltage battery 170 meets the corresponding power supply conditions and the high-voltage power battery 160 meets the corresponding power supply conditions; the third control signal is used to control the conduction of the third transmission line.

[0077] Specifically, the vehicle power supply device further includes a third on-off device 210, such as Figure 2 and Figure 3As shown, the power controller 150 is connected to the third on-off device 210, as shown in FIG. Figure 3 As shown, the third on-off device 210 may be a relay, which is connected to the third power transmission line to control the on and off of the third power transmission line, which supplies power to the first electrical appliance 240 .

[0078] Specifically, the first electrical consumer 240 can be an electrical consumer that does not require constant power. For example, the first electrical consumer 240 can be a high-voltage electrical consumer. In other words, the third switching device 210 can be used to connect the power transmission line where the high-voltage electrical consumer resides, namely, the third transmission line. Furthermore, the first electrical consumer 240 can include multiple high-voltage electrical consumers, such as a drive motor, a high-voltage distribution board, an electric compressor, and an onboard charger.

[0079] Exemplarily, the status information of the low-voltage battery 170 includes the voltage of the low-voltage battery, the current of the low-voltage battery, and the temperature of the low-voltage battery. For example, the low-voltage battery 170 satisfies the corresponding power supply condition, which 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 at the same time, the temperature of the low-voltage battery is within a preset temperature range. The high-voltage power battery 160 satisfies the corresponding power supply condition, which may be that the operating status 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 controller 150 generates a third control signal and outputs it to the third on-off device 210. The third on-off device 210 is closed, and then the third transmission line is turned on, and the first electrical appliance in the third transmission line is powered and starts to operate.

[0080] In actual application, before starting the vehicle, if the user needs electricity for the vehicle, the user can manually press the first on-off device 110. After the first on-off device 110 is closed, the first transmission line where the power controller 150 is located is connected, and the power controller 150 enters the working mode. The power controller 150 performs a low-voltage battery 170 fault self-test on the low-voltage battery 170. After determining that the low-voltage battery 170 has no related faults, the second on-off device 120 is controlled to close, and the second transmission line is connected. The low-voltage battery 170 supplies power to the voltage conversion module 180 connected to the second transmission line, and at the same time provides normal power to other low-voltage electrical appliances in the second transmission line, such as the ignition lock 130. When the power controller 150 detects the ON gear signal, it starts monitoring and managing the high-voltage power battery 160. For example, the power controller 150 can judge the high-voltage power battery 160 by Whether the high-voltage power battery 160 has an alarm message within the second preset time period is used to determine whether the high-voltage power battery 160 meets the power supply conditions. If the high-voltage power battery 160 does not issue an alarm message within the second preset time period, it indicates that the high-voltage power battery 160 meets the power supply conditions. At this time, the power controller 150 outputs a third control signal to control the third on-off device 210 to close, and the third 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 drive motor, a high-voltage distribution board, an electric compressor, etc. It needs to be further explained that after the third on-off device 210 is closed, the power supply object of the low-voltage battery 170 is the control equipment such as the corresponding power controller of the first electrical appliance in the third transmission line. From a certain perspective, when the third on-off device is closed, the low-voltage battery 170 starts to supply power to the entire vehicle.

[0081] The vehicle power supply device provided in this embodiment controls the power supply to high-voltage electrical appliances when both the low-voltage battery 170 and the high-voltage power battery 160 meet corresponding power supply conditions, thereby improving power supply safety.

[0082] In an exemplary embodiment, the vehicle controller 140 is further connected to the third on-off device 210 , which is configured to output a fourth control signal when an ON signal of the ignition lock 130 is detected; the fourth control signal is configured to control the conduction of the third power transmission line.

[0083] Specifically, the vehicle controller 140 is connected to the third on-off device 210 and the third power transmission line. Figure 3As shown, the third on-off device 210 and the power controller 150 are connected via a third diode 211, and the third on-off device 210 and the vehicle controller 140 are connected via a fourth diode 212. The third diode 211 is used to prevent the current between the vehicle controller 140 and the third on-off device 210 from flowing back into the power controller 150. Similarly, the fourth diode 212 is used to prevent the current between the power controller 150 and the third on-off device 210 from flowing back into the vehicle controller 140. When the vehicle controller 140 detects the ON position signal of the ignition lock 130, it outputs a fourth control signal to the third on-off device 210 to control the conduction of the third power transmission line.

[0084] After the ON gear signal is generated, the power controller 150 and the vehicle controller 140 will detect the ON gear signal. For the power controller 150, after receiving the ON gear signal, if the low-voltage battery 170 meets the corresponding power supply conditions and the high-voltage power battery 160 meets the corresponding power supply conditions, the power controller 150 outputs a third control signal to the third on-off device 210 for controlling the conduction of the third transmission line; for the vehicle controller 140, after receiving the ON gear signal, the vehicle controller 140 outputs a fourth control signal to the third on-off device 210 for controlling the conduction of the third transmission line. In the related art, the control of the third on-off device 210 further refers to the conduction of the third power transmission line being controlled only by the corresponding single control line. The presence of the ON signal indicates that the vehicle is in motion. At this time, if the power controller 150 fails, the third transmission line is disconnected, and non-low-voltage electrical appliances in the second transmission line, such as the drive motor, will stop working. This situation will cause the entire vehicle to lose control, which is very dangerous. To prevent this from happening, the inventive concept of the vehicle power supply device provided in this embodiment is that the power controller 150 and the vehicle controller 140 simultaneously control the closing of the third on-off device 210, that is, the conduction of the third transmission line. In this way, during vehicle driving, if the power controller 150 fails, the vehicle controller 140 can use its fourth control signal continuously output to the third on-off device 210 to maintain the conduction of the third transmission line. In this way, the dual control function of the power controller 150 and the vehicle controller 140 over the third transmission line can provide power supply reliability for the vehicle power supply device. At the same time, it gives the user more time to adjust the vehicle when related abnormal conditions occur during vehicle driving, thereby ensuring power supply safety and driving safety during vehicle driving.

[0085] In an exemplary embodiment, as Figure 2 and Figure 3 As shown, the vehicle power supply device further includes a fourth on-off device 220 and a fifth on-off device 230;

[0086] The second power transmission line is connected to the second electrical appliance 250 through the fourth on-off device 220, and is connected to the third electrical appliance 260 through the fifth on-off device 230; the ignition lock 130 is connected to the fourth on-off device 220 and the fifth on-off device 230, and is used to control the fourth on-off device 220 and the fifth on-off device 230 to be closed when the ON gear is turned to the ON position; the second electrical appliance 250 is a driving-related control device, which can receive the normal power of the second transmission line when the fourth on-off device 220 is closed; the third electrical appliance 260 is a non-driving-related control device, which can receive the normal power of the second transmission line when the fifth on-off device 230 is closed.

[0087] Specifically, the output end of the second power transmission line is connected to a second electrical load 250 via a fourth on / off device 220. Simultaneously, the output end of the second power transmission line is connected to a third electrical load 260 via a fifth on / off device 230. When the fourth on / off device 220 is closed, the low-voltage battery 170 supplies power to the second electrical load 250. When the fifth on / off device 230 is closed, the low-voltage battery 170 supplies power to the third electrical load 260. The second electrical load 250 is a driving-related control device. Furthermore, the second electrical load 250 is a driving safety-related control device. These driving safety-related control devices and related control functions include: rearview mirror adjustment, instrument cluster, airbags, backup camera, headlights, and control power supplies for various control systems (such as tire pressure control systems, electric steering systems, anti-lock braking systems (ABS), and traction control systems (TCS). The third electrical load 260 is a non-driving-related control device. Furthermore, the third electrical load 260 is a non-driving safety-related control device or electrical device, such as an air conditioner blower and an electric heater defroster.

[0088] Specifically, the ignition lock 130 is connected to both the fourth on-off device 220 and the fifth on-off device 230. When the second power transmission line is on, the output end of the second power transmission line outputs a constant current to the ignition lock 130 to power the ignition lock 130. When the ignition lock 130 is turned to the ON position, the ignition lock 130 controls the closing of the fourth on-off device 220 and the fifth on-off device 230. Consequently, the corresponding power transmission lines from the output end of the second power transmission line to the second electrical consumer 250 and the third electrical consumer 260 are all connected. The low-voltage battery 170 outputs a first ON current to the second electrical consumer 250 through the fourth on-off device 220 and outputs a second ON current to the third electrical consumer 260 through the fifth on-off device 230. Both the fourth on-off device 220 and the fifth on-off device 230 can be relay on-off devices. When the second power supply line is on, the ignition lock 130 controls the closing and opening of the fourth on-off device 220 and the fifth on-off device 230. The fourth on-off device 220 and the fifth on-off device 230 can be connected to the output end of the second power transmission line through respective fuses. The use of fuses can prevent short circuit faults from damaging the corresponding power transmission line and the corresponding electrical appliances.

[0089] In the related art, electrical appliances connected to the ON position in the ignition lock 130, such as the on / off devices of other related control systems, are usually controlled by the same on / off device circuit. Therefore, when a fault occurs in the on / off device circuit, the on / off devices of the related control systems cannot be used normally, which can easily cause traffic accidents and make driving safety impossible to ensure. In this embodiment, a fourth on-off device 220 and a fifth on-off device 230 are provided at the output end of the second power supply line. When the second power transmission line is turned on, the ignition lock 130 is turned to the ON position to control the fourth on-off device 220 and the fifth on-off device 230 to be closed. Then, the second power supply line can be used to supply power to the second electrical appliance 250 and the third electrical appliance 260 respectively. The second electrical appliance 250 is a control device related to driving safety, and the third electrical appliance 260 is a control device not related to driving safety. Thus, the control devices related to driving safety and the control devices not related to driving safety can be controlled separately through different on-off device lines. If the on-off device line where the fifth on-off device 230 is located fails during driving, it will not cause the power-off of the control devices related to driving safety, thereby greatly reducing the impact of the on-off device line failure on driving safety and improving the driving safety of electric vehicles.

[0090] In an exemplary embodiment, the power controller 150 is also connected to the output end of the fifth on-off device 230, and is used to monitor whether the fifth on-off device 230 outputs the normal power of the second transmission line. If the fifth on-off device 230 does not output the normal power of the second transmission line, the low-voltage battery 170 is controlled to enter sleep mode.

[0091] Specifically, if Figure 3As shown, the output ends of the power controller 150 and the fifth on-off device 230 are connected through the vehicle ON line 360. In this way, the power controller 150 can monitor whether the fifth on-off device 230 outputs the normal power of the second transmission line through the vehicle ON line 360. When the fifth on-off device 230 does not output the normal power, it indicates that the relevant electrical appliances no longer need electricity. At this time, the low-voltage battery 170 can be controlled to enter sleep mode.

[0092] In this embodiment, by connecting the power controller 150 and the output end of the fifth on-off device 230, the power controller 150 can monitor whether the relevant electrical appliances need electricity. When the relevant electrical appliances no longer need electricity, the low-voltage battery 170 is controlled to enter the sleep mode, which can save the vehicle's power consumption.

[0093] In an exemplary embodiment, the status information of the low-voltage battery 170 includes the voltage of the low-voltage battery 170 , the current of the low-voltage battery 170 , and the temperature of the low-voltage battery 170 ; the power supply device of the vehicle further includes a voltage acquisition module, a current acquisition module, and a temperature acquisition module;

[0094] The voltage acquisition module is used to collect the voltage of the low-voltage battery;

[0095] The current acquisition module is used to collect the current of the low-voltage battery;

[0096] The temperature acquisition module is used to collect the temperature of the low-voltage battery;

[0097] The power controller 150 is connected to the voltage acquisition module, the current acquisition module and the temperature acquisition module, and is used to obtain the voltage, current and temperature of the low-voltage battery; based on the voltage, current and temperature of the low-voltage battery, it determines whether the low-voltage battery 170 meets the power supply conditions.

[0098] Specifically, the voltage acquisition module, the current acquisition module and the temperature acquisition module are all arranged on the low voltage battery 170, such as Figure 3 As shown, the voltage acquisition module is connected to the power controller 150 through the voltage acquisition harness 172, the current acquisition module is connected to the power controller 150 through the current acquisition harness 171, and the temperature acquisition module is connected to the power controller 150 through the temperature acquisition harness 173. In this way, after the power controller 150 enters the working state, the voltage of the low-voltage battery can be collected through the voltage acquisition module, the current acquisition module can collect the current of the low-voltage battery, and the temperature acquisition module can collect the temperature of the low-voltage battery, and then based on the status information of these low-voltage batteries 170, it can be judged whether the low-voltage battery 170 meets the power supply conditions.

[0099] 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.

[0100] The vehicle power supply device provided in this embodiment can accurately detect the voltage, current and temperature of the low-voltage battery by setting a voltage acquisition module, a current acquisition module and a temperature acquisition module on the low-voltage battery 170, thereby realizing accurate detection of the status information of the low-voltage battery 170.

[0101] The following describes the specific structure and working mode of the vehicle power supply device of the present invention through an optional embodiment. Figure 3 As shown, the vehicle power supply device in this embodiment includes: a first transmission line, a second transmission line and a third transmission line.

[0102] In the first power transmission line, the first on / off device 110 is connected between the negative power supply terminal of the power controller 150 and the low-voltage battery 170. The positive power supply terminal of the low-voltage battery 170 is connected to the positive terminal of the low-voltage battery 170. The three form a first power transmission line. When the first on / off device is closed, the first power transmission line is connected, the low-voltage battery 170 begins to supply power to the power controller 150, and the power controller 150 enters the operating mode. The low-voltage battery 170 can be, for example, a 24V battery.

[0103] In the second power transmission line, the positive electrode of the low-voltage battery 170 is connected to the second on-off device 120, and the power controller 150 is connected to the second on-off device 120 through the first diode 121. The power controller 150 can output a first control signal to the second on-off device 120 for controlling the on and off of the second power transmission line. The vehicle controller 140 is connected to the second on-off device 120 through the second diode 122. The vehicle controller 140 is also connected to the IG1 terminal and the IG2 terminal of the ignition lock 130 for detecting the ON gear signal output by the ignition lock 130. When the vehicle controller 140 detects the ON gear signal, the vehicle controller The controller 140 can output a second control signal to the second on-off device 120 for controlling the on and off of the second transmission line. The first diode 121 is used to prevent the current between the vehicle controller 140 and the second on-off device 120 from flowing back to the power controller 150. The second diode 122 is used to prevent the current between the power controller 150 and the second on-off device 120 from flowing back to the vehicle controller 140. When the second on-off device 120 is closed, the low-voltage battery 170 uses the output end of the second transmission line (i.e., the 24V positive output end and the 24V negative output end) to output normal power through the first fuse 310. The 24V positive output end of the second power transmission line is connected to the vehicle controller 140 through the fourth fuse 340 to supply power to the vehicle controller 140 when the second power transmission line is turned on; the 24V positive output end of the second power transmission line is connected to the ignition lock 130 through the ignition lock fuse 137 to supply power to the ignition lock 130 when the second power transmission line is turned on; the 24V positive output end of the second power transmission line is connected to the fourth on-off device 220 through the second fuse 320 to supply power to the fourth on-off device 220 when the second power transmission line is turned on. 220 is powered; the 24V positive output end of the second transmission line is connected to the fifth on-off device 230 through the third fuse 330 to power the fifth on-off device 230 when the second transmission line is turned on; the 24V positive output end of the second transmission line is also connected to the sixth on-off device 270 to power the sixth on-off device 270 when the second transmission line is turned on; the 24V positive output end of the second transmission line is connected to the voltage conversion module 180 to power the voltage conversion module 180 when the second transmission line is turned on.

[0104] The IG1 end of the ignition lock 130 is connected to the first on-off device, and 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 from the LOCK gear to the ON gear, the first on-off device and the second on-off device can be controlled to close at the same time. In addition, the IG1 end of the ignition lock 130 is connected to the fourth on-off device 220, and 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 from the LOCK gear to the ON gear, the fourth on-off device 220 and the fifth on-off device 230 can be controlled to close at the same time. 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 the sixth on-off device, and the B1 end and B2 end (not marked in the figure) of the ignition lock 105 are connected. The ignition lock fuse 137 is connected to the 24V positive output end of the second power transmission line for receiving normal power output; when the ignition lock 130 is turned to the ACC gear, the sixth on-off device 270 is controlled to be closed, and the sixth on-off device 270 outputs ACC power to power the electrical appliance corresponding to the sixth on-off device; when the ignition lock 130 is turned to the ON gear, the fourth on-off device 220 and the fifth on-off device 230 are controlled to be closed, and the fourth on-off device 220 outputs the first ON power to power the second electrical appliance 250, and the fifth on-off device 230 outputs the second ON power to power the third electrical appliance 260; when the ignition lock 105 is turned to the ST gear, the vehicle start signal is output through the ST end of the ignition lock 130 to start the engine.

[0105] The power controller 150 is also connected to the fifth on-off device 230 via the vehicle ON line 360, and is used to detect whether there is a normal power output in the fifth on-off device 230. The voltage conversion module 180 is connected to the high-voltage power battery 160 via the high-voltage input positive line and the high-voltage input negative line. When the power controller 150 recognizes that the low-voltage battery 170 meets the charging conditions, it converts the high-voltage voltage output by the high-voltage power battery 160 into a target voltage, such as 24V voltage, to charge the low-voltage battery 170; the low-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 low-voltage battery 170, Figure 3 (not shown in the figure), the voltage conversion module 180 is connected to the voltage sensor, the current sensor 174 and the temperature sensor through the voltage acquisition harness 172, the current acquisition harness 171 and the temperature acquisition harness 173 respectively to obtain the status information of the low-voltage battery 170; the voltage conversion module 180 is connected to the output end of the second transmission line. On the one hand, the voltage conversion component of the voltage conversion module 180 is powered by the second transmission line. 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 power for the vehicle.

[0106] In the third transmission line, the positive pole of the low-voltage battery 170 is connected to the third on-off device 210, and the power controller 150 is connected to the third on-off device 210 through the third diode 211. The power controller 150 can output a third control signal to the third on-off device 210 for controlling the on-off of the second transmission line. The vehicle controller 140 is connected to the third on-off device 210 through the fourth diode 212. The vehicle controller 140 can output a fourth control signal to the third on-off device 210 for controlling the on-off of the second transmission line. The third diode 211 is used to prevent the current between the vehicle controller 140 and the third on-off device 210 from flowing back to the power controller 150, and the fourth diode 212 is used to prevent the current between the power controller 150 and the third on-off device 210 from flowing back to the vehicle controller 140. The output end of the third transmission line is connected to the first electrical appliance 240 through the fifth fuse 350. When the third on-off device 210 is closed, the third transmission line is turned on, and the low-voltage battery 170 supplies power to the corresponding power controller of the first electrical appliance 240 in the third transmission line. The high voltage used by the first electrical appliance 240 itself is supplied by the high-voltage power battery 160. It should be explained that the fifth fuse 350 is a general term for several fuses, and each fifth fuse 350 is connected to a first electrical appliance 240, so the fusing current of each fifth fuse 350 is not exactly the same, and corresponds to its corresponding transmission line and the first electrical appliance 240.

[0107] The vehicle controller 140 and the voltage conversion module 180 are connected to each other through the CANH line and CANL line in the CAN bus for data exchange; the vehicle controller 140 and the power controller 150 are also connected to each other through the CANH line and CANL line in the CAN bus for data exchange.

[0108] The following combination Figure 4 and Figure 5 The working process of the vehicle power supply device is further explained. Figure 4As shown, 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 manually, and the power controller 150 enters the working mode. The power controller 150 performs a self-test on the low-voltage battery 170. If the low-voltage battery 170 has a fault, the fault light is on to indicate 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 and performs a self-test on the voltage conversion module 180. If the voltage conversion module 180 has a fault, the fault light is on to indicate the fault. If there is no fault in the voltage conversion module 180, the power controller 150 collects the voltage, current and temperature of the low-voltage battery in real time, and the power controller 150 controls the second on-off device 120 to close, and the second power transmission line is turned on. The low-voltage battery 170 distributes normal power to the vehicle through the normal power output terminal, that is, the 24V positive output terminal and the 24V negative output terminal through the first fuse. The ignition lock 130 is connected to the normal power distribution through the third fuse, and the low-voltage battery 170 supplies normal power to the ignition lock 130.

[0109] The ignition lock 130 includes different gears. The user switches the ignition lock 130 from the LOCK gear to the ACC gear as needed. The ignition lock 130 controls the sixth on / off device 270 to close via a hard wire, and the low-voltage battery 170 supplies power to the infotainment device in the ACC gear.

[0110] The user turns the ignition lock 130 from the LOCK gear to the ON gear as needed, and the ignition lock 130 controls the fourth on-off device 220 and the fifth on-off device 230 to be closed through a hard line. The fourth on-off device 220 is the IG1 relay, and the fourth on-off device 220 supplies the first ON power to the power controller related to driving safety. The fifth on-off device 230 is the IG2 relay, and the fifth on-off device 230 supplies the second ON power to the power controller not related to driving safety. The power controller 150 detects the ON gear signal in real time. If there is no ON gear signal, the low-voltage battery 170 is controlled to enter the sleep mode. If there is an ON gear signal, the power controller 150 starts monitoring and managing the high-voltage power battery 160, collects and outputs relevant information of the high-voltage power battery 160, and determines whether the high-voltage power battery 160 has a fault. If the high-voltage power battery 160 has a fault, an alarm signal will be issued to troubleshoot the fault. If the high-voltage power battery 160 has no fault, There is no alarm. At this time, the power controller 150 controls the third on-off device to close, and the low-voltage battery 170 starts to supply power to the entire vehicle; when the power controller 150 detects the ON gear signal, the low-voltage battery 170 supplies power to the VCU through the fourth fuse 340. The VCU is the vehicle controller 140, and the VCU will also detect the ON gear signal. After that, the VCU manages the vehicle control system of the vehicle. The VCU outputs the second control signal through the second diode 122 to control the second on-off device 120 to remain on. When the power controller 150 fails, the VCU outputs the second control signal through the second diode 122 to continue to control the second on-off device 120 to remain on. The VCU outputs the fourth control signal through the fourth diode 212 to continue to control the third on-off device 210 to remain on. When the low-voltage battery 170 has a circuit breaker fault, the voltage conversion module 180 replaces the low-voltage battery 170 to supply power to the entire vehicle.

[0111] like Figure 5 As shown, 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 based on the status information of the low-voltage battery. When the remaining power of the low-voltage battery is less than 30% or when the discharge current of the low-voltage battery is greater than 20A, the power controller 150 activates the voltage conversion module 180 through hard-line control. After the voltage conversion module 180 is activated, the high-voltage voltage output by the high-voltage power battery 160 is converted into a target voltage by the voltage conversion module 180 to charge the low-voltage battery 170. Charging is stopped when the remaining power of the low-voltage battery is greater than or equal to 95%; when the power controller 150 does not detect the ON gear 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 outputs normal power; when the vehicle needs to be parked for a long time, the user presses and holds the power on / off device of the low-voltage battery 170, the low-voltage battery 170 no longer supplies power to the outside, the power controller 150 stops working, and the vehicle's power consumption ends.

[0112] The vehicle power supply method provided by the present invention is described below. The vehicle power supply method described below and the vehicle power supply device described above can be referenced to each other.

[0113] An embodiment of the present invention further provides a vehicle power supply method based on the vehicle power supply device provided in any of the above embodiments, comprising:

[0114] Step 610: The power controller 150 enters the operating mode when the first on-off device 110 turns on the first power transmission line. If the low-voltage battery 170 meets the corresponding power supply conditions, the power controller 150 outputs a first control signal to the second on-off device 120. If the high-voltage power battery 160 meets the corresponding power supply conditions, the power controller 150 controls the voltage conversion module 180 to convert the voltage of the high-voltage power battery 160 into a target voltage to charge the low-voltage battery 170 based on the status information of the low-voltage battery 170. The first control signal is used to control the conduction of the second transmission line.

[0115] Step 620 : When the second power transmission line is turned on, the vehicle controller 140 detects the ON signal of the ignition lock 130 and outputs a second control signal to the second on / off device 120 ; the second control signal is used to control the conduction of the second power transmission line.

[0116] In an exemplary embodiment, when the vehicle controller 140 does not detect the ON position signal of the ignition lock 130 , it stops outputting the second control signal to the second on / off device 120 .

[0117] In an exemplary embodiment, the low-voltage battery 170 is further used to supply power to the first electrical appliance 240 via the third power transmission line; the first electrical appliance 240 is an electrical appliance that does not require constant power;

[0118] The vehicle power supply device further includes: a third on-off device 210;

[0119] The third on-off device 210 is provided on the third power transmission line and is used to control the on-off of the third power transmission line;

[0120] The power controller 150 is connected to the third on-off device 210. When the low-voltage battery 170 meets the corresponding power supply conditions and the high-voltage power battery meets the corresponding power supply conditions, the power controller 150 outputs a third control signal to the third on-off device 210; the third control signal is used to control the conduction of the third transmission line.

[0121] In an exemplary embodiment, the vehicle controller 140 is also connected to the third on-off device 210. When the vehicle controller 140 detects the ON gear signal of the ignition lock 130, it outputs a fourth control signal to the third on-off device 210; the fourth control signal is used to control the conduction of the third power transmission line.

[0122] In an exemplary embodiment, the vehicle power supply further includes a backup power source;

[0123] The voltage conversion module 180 is connected to the backup power supply, and the voltage conversion module 180 is powered when a circuit breaker fault occurs in the low-voltage battery 170;

[0124] The power controller 150 also controls the voltage conversion module 180 to replace the low-voltage battery 170 to supply power when a circuit breaker fault occurs in the low-voltage battery 170 .

[0125] In an exemplary embodiment, the vehicle power supply device further includes a fourth on-off device 220 and a fifth on-off device 230;

[0126] The second power transmission line is connected to the second electrical appliance 250 through the fourth on-off device 220, and is connected to the third electrical appliance 260 through the fifth on-off device 230; the ignition lock 130 is connected to the fourth on-off device 220 and the fifth on-off device 230. When the ignition lock 130 is turned to the ON position, it controls the fourth on-off device 220 and the fifth on-off device 230 to close; the second electrical appliance 250 is a driving-related control device, which can receive the normal power of the second transmission line when the fourth on-off device 220 is closed; the third electrical appliance 260 is a non-driving-related control device, which can receive the normal power of the second transmission line when the fifth on-off device 230 is closed.

[0127] In an exemplary embodiment, the power controller 150 is also connected to the output end of the fifth on-off device 230. The power controller 150 monitors whether the fifth on-off device 230 outputs the normal power of the second transmission line. If the fifth on-off device 230 does not output the normal power of the second transmission line, the low-voltage battery 170 is controlled to enter sleep mode.

[0128] In an exemplary embodiment, the status information of the low-voltage battery includes the voltage of the low-voltage battery, the current of the low-voltage battery, and the temperature of the low-voltage battery; the power supply device of the vehicle further includes a voltage acquisition module, a current acquisition module, and a temperature acquisition module;

[0129] The voltage acquisition module is used to collect the voltage of the low-voltage battery;

[0130] The current acquisition module is used to collect the current of the low-voltage battery;

[0131] The temperature acquisition module is used to collect the temperature of the low-voltage battery;

[0132] The power controller 150 is connected to the voltage acquisition module, the current acquisition module and the temperature acquisition module. The power controller 150 obtains the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; based on the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery, it determines whether the low-voltage battery 170 meets the power supply conditions.

[0133] An embodiment of the present invention further provides a vehicle, comprising the vehicle power supply device provided by any of the above embodiments, or used to execute the vehicle power supply method provided by any of the above embodiments.

[0134] In this embodiment, the vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an electric working machine such as an electric crane or an electric excavator.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A vehicle power supply device, characterized in that: include: The power controller, high-voltage power battery, low-voltage battery and voltage conversion module are integrated into the same box; it also includes the ignition lock, vehicle controller, first transmission line and second transmission line; The low-voltage battery is connected to the first power transmission line and is used to supply power to the power controller; The first transmission line is provided with a first on-off device for controlling the on-off of the first transmission line; The low-voltage battery is connected to the second power transmission line for providing normal power; The voltage conversion module is powered by the second power transmission line; The second transmission line is provided with a second on-off device for controlling the on-off of the second transmission line; The power controller is configured to enter an operating mode when the first on-off device switches on the first power transmission line, and output a first control signal to the second on-off device if the low-voltage battery meets the corresponding power supply condition; and control the voltage conversion module to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the status information of the low-voltage battery if the high-voltage power battery meets the corresponding power supply condition; the first control signal is used to control the switching on of the second transmission line; The vehicle controller is connected to the second power transmission line, the second on-off device and the ignition lock respectively, and is configured to output a second control signal to the second on-off device when the second power transmission line is turned on and an ON signal of the ignition lock is detected; The second control signal is used to control the conduction of the second power transmission line; The status information of the low-voltage battery includes 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 also includes a voltage acquisition module, a current acquisition module and a temperature acquisition module; The voltage acquisition module is used to acquire the voltage of the low-voltage battery; The current acquisition module is used to acquire the current of the low-voltage battery; The temperature acquisition module is used to collect the temperature of the low-voltage battery; The power supply controller is connected to the voltage acquisition module, the current acquisition module and the temperature acquisition module, and is used to obtain the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery; Based on the voltage of the low-voltage battery, the current of the low-voltage battery, and the temperature of the low-voltage battery, it is determined whether the low-voltage battery meets a corresponding power supply condition.

2. The vehicle power supply device according to claim 1, characterized in that: Also includes backup power; The voltage conversion module is connected to the backup power supply and is used to supply power to the voltage conversion module when a circuit breaker fault occurs in the low-voltage battery; The power controller is further configured to control the voltage conversion module to supply power in place of the low-voltage battery when a short-circuit fault occurs in the low-voltage battery.

3. The vehicle power supply device according to claim 2, characterized in that: The backup power supply includes an inductor and a capacitor.

4. The vehicle power supply device according to claim 1, characterized in that: The vehicle controller is configured to stop outputting the second control signal to the second on-off device when no ON signal of the ignition lock is detected.

5. The vehicle power supply device according to claim 1, characterized in that: The device further comprises a third power transmission line; the low-voltage battery is connected to the third power transmission line and is further used to supply power to a first electrical appliance via the third power transmission line; the first electrical appliance is an electrical appliance that does not require constant power; the third power transmission line is provided with a third on-off device for controlling the on-off of the third power transmission line; The power supply controller is connected to the third on-off device and is used to output a third control signal to the third on-off device when the low-voltage battery meets the corresponding power supply conditions and the high-voltage power battery meets the corresponding power supply conditions; the third control signal is used to control the conduction of the third transmission line.

6. The vehicle power supply device according to claim 5, characterized in that: The vehicle controller is also connected to the third on-off device and is used to output a fourth control signal to the third on-off device when detecting the ON gear signal of the ignition lock; the fourth control signal is used to control the conduction of the third power transmission line.

7. A vehicle power supply method based on the vehicle power supply device according to any one of claims 1 to 6, characterized in that: include: The power controller enters an operating mode when the first on-off device switches on the first power transmission line. If the low-voltage battery meets the corresponding power supply conditions, the power controller outputs a first control signal to the second on-off device. If the high-voltage power battery meets the corresponding power supply conditions, the power controller controls the voltage conversion module to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the status information of the low-voltage battery. The first control signal is used to control the conduction of the second transmission line. When the second power transmission line is turned on, the vehicle controller outputs a second control signal to the second on-off device when it detects the ON gear signal of the ignition lock; the second control signal is used to control the conduction of the second power transmission line.

8. The vehicle power supply method according to claim 7, characterized in that: Also includes: When the vehicle controller does not detect the ON gear signal of the ignition lock, it stops outputting the second control signal to the second on-off device.

9. A vehicle, characterized in that: The vehicle power supply device comprises the vehicle power supply device according to any one of claims 1 to 6, or is used to perform the vehicle power supply method according to claim 7 or 8.

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