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, a power supply method and a vehicle, comprising: a first on-off switch arranged on a first power supply line, a second on-off switch arranged on a second power supply line, and a control module, a high-voltage power battery, a low-voltage battery and a DC converter integrated in the same housing; the control module is used to enter a working mode when the first on-off switch is turned on, and if the low-voltage battery meets the power supply conditions, control the second on-off switch to turn on the second power supply line; when the high-voltage power battery meets the corresponding power supply conditions, control the DC converter to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery. By integrating the DC converter and the high-voltage power battery together in the same housing, and setting different switches to respectively conduct the normal power supply line and the high-voltage power supply line, the power supply safety of the vehicle power supply device can be guaranteed.

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 and low-voltage battery in the vehicle's power supply system play an important role in the vehicle. The high-voltage power battery provides power for the vehicle, and the low-voltage battery provides regular power supply for the vehicle or power the entire vehicle.

[0003] How to improve the power supply safety of vehicles with high-voltage power batteries and low-voltage batteries remains a technical problem that urgently needs 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 of vehicles with high-voltage power batteries and low-voltage batteries in the prior art, thereby improving the power supply safety of the vehicle.

[0005] The present invention provides a vehicle power supply device, comprising: a first on-off switch provided on a first power supply line, a second on-off switch provided on a second power supply line, and a control module, a high-voltage power battery, a low-voltage battery, and a DC converter integrated in the same box;

[0006] The control module is connected to the high-voltage power battery, the low-voltage battery and the DC converter respectively; the DC converter is also connected to the high-voltage power battery and the low-voltage battery respectively;

[0007] The low-voltage battery is used to supply power to the control module through the first power supply line and to provide normal power through the second power supply line; the DC converter is powered by the second power supply line;

[0008] The control module is configured to enter a working mode when the first on-off switch turns on the first power supply line, and control the second on-off switch to turn on the second power supply line if the low-voltage battery meets the power supply conditions; and control the DC converter to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the state parameters of the low-voltage battery when the high-voltage power battery meets the corresponding power supply conditions.

[0009] A vehicle power supply device according to the present invention further includes an ignition lock;

[0010] The second power supply circuit is connected to the ignition lock, connected to the first electrical equipment through the third on-off switch, and connected to the second electrical equipment through the fourth on-off switch; the ignition lock is connected to the third on-off switch and the fourth on-off switch, and is used to control the closing and closing of the third on-off switch and the fourth on-off switch when the ignition lock is turned to the ON position; the first electrical equipment is an electrical equipment related to driving safety, and can receive the normal power of the second power supply circuit when the third on-off switch is closed; the second electrical equipment is an electrical equipment not related to driving safety, and can receive the normal power output by the second power supply circuit when the fourth on-off switch is closed.

[0011] According to a vehicle power supply device provided by the present invention, the control module is connected to the ignition lock and is further used to:

[0012] Detect ON signal;

[0013] If no ON signal is detected, the low-voltage battery is controlled to enter a sleep mode.

[0014] According to a vehicle power supply device provided by the present invention, the control module is further configured to:

[0015] If an ON signal is detected, monitoring the operating status of the high-voltage power battery;

[0016] If the operating state of the high-voltage power battery is normal, it is determined that the high-voltage power battery meets the power supply condition.

[0017] A vehicle power supply device according to the present invention further includes a fifth on-off switch;

[0018] The second power supply circuit is connected to a fourth electrical device through the fifth on-off switch; the ignition lock is connected to the fifth on-off switch, and is used to control the opening and closing of the fifth on-off switch when the ignition lock is turned to the ACC gear; the fourth electrical device is an on-vehicle accessory device, which can receive normal power from the second power supply circuit when the fifth on-off switch is opened and closed.

[0019] According to a vehicle power supply device provided by the present invention, the control module is also connected to the output end of the fourth on-off switch, and is used to monitor whether the fourth on-off switch outputs the normal power of the second power supply circuit. If the fourth on-off switch does not output the normal power of the second power supply circuit, the low-voltage battery is controlled to enter a sleep mode.

[0020] According to a vehicle power supply device provided by the present invention, the low-voltage battery is further used to supply power to a third electrical device through a third power supply line; the third electrical device is an electrical device that does not require constant power;

[0021] The vehicle power supply device further includes: a sixth on-off switch;

[0022] The sixth on-off switch is provided on the third power supply line, and is used to control the on-off of the third power supply line;

[0023] The control module is connected to the sixth on-off switch and is configured to control the sixth on-off switch to turn on the third power supply line when the low-voltage battery meets the corresponding power supply conditions and the high-voltage power battery meets the corresponding power supply conditions.

[0024] The present invention also provides a vehicle power supply method based on any of the above-mentioned vehicle power supply devices, comprising:

[0025] The control module enters a working mode when the first on-off switch turns on the first power supply line, and controls the second on-off switch to turn on the second power supply line if the low-voltage battery meets the power supply condition;

[0026] If the high-voltage power battery meets the power supply conditions, the control module controls the DC converter to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the state parameters of the low-voltage battery.

[0027] A vehicle power supply method provided according to the present invention includes:

[0028] When the ignition lock is turned to the ON position, the third on-off switch and the fourth on-off switch are controlled to be closed.

[0029] 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.

[0030] The vehicle power supply device, power supply method and vehicle provided by the present invention, on the one hand, can ensure the safety of vehicle power supply by successively judging whether the low-voltage battery and the high-voltage power battery meet the corresponding power supply conditions and then performing the next step of control; on the other hand, the high-voltage power battery, the low-voltage battery, the DC converter and the control module are all integrated into the same box. In this way, even if the vehicle is repaired while it is charging, the high-voltage wire between the high-voltage power battery and the DC converter will not be exposed to the air and pose a safety threat to the human body as in the related art. In this way, not only the safety of vehicle power supply is further improved, but also the safety of the entire vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 This is one of the structural diagrams of the vehicle power supply device provided by an embodiment of the present invention;

[0033] Figure 2 This is the second structural diagram of the vehicle power supply device provided by an embodiment of the present invention;

[0034] Figure 3 This is the third structural diagram of the vehicle power supply device provided by an embodiment of the present invention;

[0035] Figure 4 This is one of the working process diagrams of the vehicle power supply device provided by an embodiment of the present invention;

[0036] Figure 5 This is the second working flow diagram of the vehicle power supply device provided by the embodiment of the present invention;

[0037] Figure 6 is a flow chart of a vehicle power supply method provided by an embodiment of the present invention;

[0038] Figure 7 An electronic device provided by an embodiment of the present invention;

[0039] Reference numerals:

[0040] 110: third on-off switch; 111: first electrical device; 112: third on-off switch fuse; 120: fourth on-off switch; 121: second electrical device; 122: fourth on-off switch fuse;

[0041] 130: Control module; 140: High-voltage power battery; 150: Low-voltage battery; 151: Current sensor; 152: First fuse; 160: DC converter; 170: Ignition lock; 172: Ignition lock fuse;

[0042] 230: first on-off switch; 240: second on-off switch; 250: sixth on-off switch; 251: third electrical device; 252: second fuse; 260: fifth on-off switch; 261: fourth electrical device. DETAILED DESCRIPTION

[0043] 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.

[0044] In the description of the embodiments of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0046] The following combination Figures 1 to 5 The vehicle power supply device of the present invention is described.

[0047] like Figure 1 As shown, an embodiment of the present invention provides a vehicle power supply device, comprising: a first on-off switch 230 provided on a first power supply line, a second on-off switch 240 provided on a second power supply line, and a control module 130, a high-voltage power battery 140, a low-voltage battery 150, and a DC converter 160 integrated in the same box;

[0048] The control module 130 is connected to the high-voltage power battery 140, the low-voltage battery 150 and the DC converter 160 respectively; the DC converter 160 is also connected to the high-voltage power battery 140 and the low-voltage battery 150 respectively;

[0049] The low-voltage battery 150 is used to supply power to the control module 130 via a first power supply line and to provide normal power via a second power supply line; the DC converter 160 is powered by the second power supply line;

[0050] The control module 130 is used to control the control module 130 to enter the working mode when the first on-off switch 230 turns on the first power supply line, and if the low-voltage battery 150 meets the power supply conditions, control the second on-off switch 240 to turn on the second power supply line; when the high-voltage power battery 140 meets the corresponding power supply conditions, based on the state parameters of the low-voltage battery, control the DC converter 160 to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery 150.

[0051] It should be noted that this embodiment makes changes to the location of some equipment in the vehicle. In related technologies, a vehicle may include a high-voltage power battery pack, a low-voltage battery pack, and an all-in-one module with an integrated DC converter. The high-voltage power battery pack contains high-voltage power batteries, a high-voltage battery control board, a cooling structure, etc. The low-voltage battery pack contains low-voltage batteries and a low-voltage battery control board, but does not contain a cooling structure. The all-in-one module with an integrated DC converter contains not only the DC converter, but also an oil pump, an air pump, a high-voltage distribution board, a DC converter control board, a CAN module, etc., and does not contain a cooling structure. 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 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. In this way, the battery frame, battery cover and related accessories of the original low-voltage battery pack can be eliminated, thereby reducing costs. This embodiment also changes the setting position of the DC converter in the vehicle in the related art, and can cancel the setting of the DC converter in the original multi-in-one module, and integrate the DC converter into the same box. In this way, the high-voltage wiring harness diameter from the high-voltage power battery to the high-voltage distribution board and from the high-voltage distribution board to the DC converter in the original multi-in-one module can be eliminated, and the low-voltage wiring harness diameter from the DC converter 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 150 and the DC converter 160 can be achieved through a copper busbar, further reducing costs.

[0052] It should be further explained that the box within the same housing can be the battery box of an existing high-voltage power battery pack in the related art. In this way, the low-voltage battery 150 and DC converter 160 can be installed in the empty space of the existing high-voltage power battery pack battery box. The same housing can also be a non-standard new battery box used to integrate the high-voltage power battery 140, the low-voltage battery 150, and the DC converter 160. Furthermore, the battery pack in the housing is positioned closest to the vehicle frame to minimize the low-voltage line. The low-voltage battery 150 can be a 24V low-voltage storage battery, and further, the low-voltage battery 150 can be a 24V low-voltage lithium battery.

[0053] In this embodiment, on the one hand, the DC converter and the high-voltage power battery are integrated together in the same box. In this way, even if the vehicle is repaired while charging, 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. On the other hand, by setting different switches to conduct the normal power supply line and the high-voltage power supply line respectively, the power supply safety of the vehicle power supply device can be further guaranteed.

[0054] In an exemplary embodiment, the vehicle power supply device further includes an ignition lock 170;

[0055] The second power supply circuit is connected to the ignition lock 170, connected to the first power consumer 111 through the third on-off switch 110, and connected to the second power consumer 121 through the fourth on-off switch 120; the ignition lock 170 is connected to the third on-off switch 110 and the fourth on-off switch 120, and is used to control the third on-off switch 110 and the fourth on-off switch 120 to be closed when the ignition lock 170 is turned to the ON position; the first power consumer 111 is a power consumer related to driving safety, and can receive the normal power of the second power supply circuit when the third on-off switch 110 is closed; the second power consumer 121 is an power consumer not related to driving safety, and can receive the normal power output from the second power supply circuit when the fourth on-off switch 120 is closed.

[0056] Specifically, if Figure 3 As shown, the DC converter 160 is connected to the high-voltage power battery 140, wherein the high-voltage power battery 140 is used to provide a power source for the vehicle. Furthermore, the high-voltage positive input terminal of the DC converter 160 is connected to the positive electrode of the high-voltage power battery 140 via a high-voltage positive input line, and the high-voltage negative input terminal of the DC converter 160 is connected to the negative electrode of the high-voltage power battery 140 via a high-voltage negative input line.

[0057] Specifically, the DC converter 160 is connected to the low-voltage battery 150, wherein the low-voltage positive input terminal of the DC converter 160 is connected to the 24V positive output terminal, and the low-voltage negative input terminal of the DC converter 160 is connected to the negative terminal of the low-voltage battery 150, so that when the low-voltage battery 150 supplies power to the second power supply line, it can supply power to the DC converter 160. In addition, the low-voltage positive output terminal of the DC converter 160 is connected to the line between the second on-off switch 240 and the low-voltage battery 150, and the low-voltage negative output terminal of the DC converter 160 is connected to the negative terminal of the low-voltage battery 150. Furthermore, the control module 130 is connected to the high-voltage power battery 140, the control module 130 is connected to the low-voltage battery 150, and the control module 130 is connected to the DC converter 160. Thus, after the second circuit is connected, when the high-voltage power battery 140 meets the corresponding power supply conditions, the control module 130 can control the DC converter 160 to convert the voltage of the high-voltage power battery 140 to a target voltage to charge the low-voltage battery 150 based on the state parameters of the low-voltage battery 150. Furthermore, the low-voltage battery 150 provides regular power to the low-voltage electrical equipment in the vehicle through the second power supply circuit. For example, the state parameters of the low-voltage battery 150 include the low-voltage battery voltage, the low-voltage battery current, and the low-voltage battery temperature.

[0058] In addition, if Figure 3As shown, the control module 130 and the DC converter 160 can be communicatively connected via the internal CANH line and the internal CANL line, so that data can be exchanged between the control module 130 and the DC converter 160 .

[0059] Specifically, the output end of the second power supply circuit is connected to the ignition lock 170 for supplying power to the ignition lock 170 when the second power supply circuit is turned on, wherein the gear positions in the ignition lock 170 may include LOCK, ST, ON and ACC.

[0060] Specifically, the output end of the second power supply circuit is connected to a first power consumer 111 via a third on-off switch 110. Simultaneously, the output end of the second power supply circuit is connected to a second power consumer 121 via a fourth on-off switch 120. When the third on-off switch 110 is closed, the low-voltage battery 150 supplies power to the first power consumer 111 via the second power supply circuit. When the fourth on-off switch 120 is closed, the low-voltage battery 150 supplies power to the second power consumer 121 via the second power supply circuit. First power consumers 111 are those related to driving safety, including the rearview mirror adjustment system, 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). Second power consumers 121 are those not related to driving safety, such as air conditioner blowers and electric heater defrosters.

[0061] Specifically, the ignition lock 170 is connected to the third on-off switch 110 and the fourth on-off switch 120 through the IG1 terminal. When the second power supply line is turned on, Figure 3 As shown, the output end of the second power supply circuit is connected to the B1 end and the B2 end of the ignition lock through the fuse 172 of the ignition lock, so that the second power supply circuit can output normal power to supply power to the ignition lock 170. When the ignition lock 170 is turned to the ON position, the ignition lock 170 controls the third on-off switch 110 and the fourth on-off switch 120 to be closed, wherein the second power supply circuit is connected to the first electrical device 111 through the third on-off switch 110, so after the third on-off switch 110 is closed, the second power supply circuit can supply power to the first electrical device 111, and the second power supply circuit is connected to the second electrical device 121 through the fourth on-off switch 120, so after the fourth on-off switch 120 is closed, the second power supply circuit can supply power to the second electrical device 121. Among them, the third on-off switch 110 and the fourth on-off switch 120 can both adopt relay switches. As shown Figure 3As shown, the third on-off switch 110 can be connected to the output end of the second power supply line through the third on-off switch fuse 112, and the fourth on-off switch 120 can be connected to the output end of the second power supply line through the fourth on-off switch fuse 122. The use of fuses can prevent short-circuit faults from damaging the corresponding power supply lines and corresponding electrical equipment.

[0062] In the related art, electrical devices connected to the ON position in the ignition lock 170, such as switches of other related control systems, are usually controlled by the same switch circuit. Therefore, when a failure occurs in the switch circuit, the switches 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 third on-off switch 110 and a fourth on-off switch 120 are provided at the output end of the second power supply line. When the second power supply line is turned on, the ignition lock 170 is turned to the ON position to control the third on-off switch 110 and the fourth on-off switch 120 to be closed. Then, the first power-consuming device 111 and the second power-consuming device 121 can be powered respectively through the second power supply line, wherein the first power-consuming device 111 is a control device related to driving safety, and the second power-consuming device 121 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 switch circuits. If the switch circuit where the fourth on-off switch 120 is located fails during driving, the control devices related to driving safety will not be powered off, which greatly reduces the impact of the switch circuit failure on driving safety and improves the driving safety of the vehicle.

[0063] The vehicle power supply device provided in this embodiment, on the one hand, divides the switch connected to the ON gear of the ignition lock 170 into a third on-off switch 110 and a fourth on-off switch 120, and further divides the electrical equipment connected to the ON gear into a first electrical equipment 111 related to driving safety corresponding to the third on-off switch 110 and a second electrical equipment 121 not related to driving safety corresponding to the fourth on-off switch 120. In this way, even if the fourth on-off switch 120 fails or the line corresponding to the fourth on-off switch 120 fails, it will not cause the first electrical equipment 111 related to driving safety to be powered off, which greatly reduces the impact of the switch line failure on driving safety and improves the driving safety of the vehicle; on the other hand, the DC converter 160 and the high-voltage power battery 140 are integrated together in the same box. In this way, even if the vehicle is repaired during charging, it will not cause harm to the human body. In this way, the power supply safety and the overall The safety of the vehicle; thirdly, the low-voltage battery 150 and the high-voltage power battery 140 are integrated into the same box, which can eliminate 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, while saving installation space, reducing the assembly process, and reducing assembly costs; fourthly, the DC converter and the high-voltage power battery and the low-voltage battery in the original all-in-one module in the related technology are integrated into the same box, which can eliminate the high-voltage wiring harness diameter from the high-voltage power battery to the high-voltage distribution board, and from the high-voltage distribution board to the DC converter in the original all-in-one module, and at the same time, eliminate the low-voltage wiring harness diameter from the DC converter in the original all-in-one module to the positive and negative poles of the low-voltage battery. In this embodiment, the connection between the low-voltage battery 150 and the DC converter 160 can be achieved through the copper bus, which not only improves reliability, but also achieves the second layer of cost and weight reduction, and weight reduction promotes the lightweighting of the vehicle, and the lightweighting of the vehicle can improve the overall performance of the vehicle.

[0064] In practical applications, such as Figures 1 to 3 As shown, the first on-off switch 230 is connected to the circuit between the control module 130 and the low-voltage battery 150. The first on-off switch 230, the low-voltage battery 150 and the control module 130 constitute a first power supply circuit. When the first on-off switch 230 is disconnected, the first power supply circuit is disconnected. When the user presses the first on-off switch 230, that is, the first on-off switch 230 is closed, the first power supply circuit is connected, the low-voltage battery 150 can power the control module 130, and the control module 130 enters the working mode.

[0065] After the control module 130 enters the working mode, it can detect whether the low-voltage battery 150 meets the corresponding power supply conditions. For example, it can determine whether the low-voltage battery 150 meets the corresponding power supply conditions by detecting the status parameters of the low-voltage battery 150. Exemplarily, the status parameters of the low-voltage battery 150 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 150 meets the power supply conditions 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.

[0066] When the control module 130 determines that the low-voltage battery 150 meets the corresponding power supply conditions, the control module 130 controls the second on-off switch 240 to close, thereby connecting the second power supply line. Since the DC converter 160 is powered by the second line, after the second on-off switch 240 is closed, the low-voltage battery 150 supplies power to the DC converter 160 connected to the second power supply line, ensuring the normal operation of the DC converter 160. At the same time, the low-voltage battery 150 also supplies power to the low-voltage electrical devices connected to the second power supply line, such as the ignition lock 170, the lighting system, and the air conditioning control system.

[0067] It should be noted that the control module 130 is constantly detecting the status parameters of the low-voltage battery 150 in real time when it is in working mode. Furthermore, the control module 130 can also determine that the high-voltage power battery 140 meets the corresponding power supply conditions by detecting that the operating status of the high-voltage power battery 140 is fault-free. When both the high-voltage power battery 140 and the low-voltage battery 150 meet the corresponding power supply conditions, the remaining power of the low-voltage battery is calculated by detecting the status parameters of the low-voltage battery 150 in real time. Based on the remaining power, it is determined whether the low-voltage battery 150 meets the charging conditions, that is, whether the low-voltage battery 150 needs to be charged. If the low-voltage battery 150 meets the charging conditions, the DC converter 160 is controlled to output the power of the high-voltage power battery 140. The high voltage voltage is converted into the target voltage required by the low voltage battery 150 to charge the low voltage battery 150. For example, when the remaining power of the low voltage battery is less than 30%, the remaining power is low at this time. The control module 130 can control the DC converter 160 to charge the low voltage battery 150. In other words, the low voltage battery 150 is only charged when the low voltage battery 150 meets the charging conditions. When the low voltage battery 150 does not meet the charging conditions, there is no need to charge the low voltage battery 150. This not only saves the power consumption of the low voltage battery 150, but also increases the service life of the low voltage battery 150.

[0068] The vehicle power supply device provided in this embodiment is configured to provide a low-voltage battery 150 with normal power supply to the vehicle through a second on-off switch 240 when the power supply conditions are met, thereby ensuring that the low-voltage battery 150 supplies power to the outside in a reasonable working state, thereby ensuring the power supply safety of the vehicle and the service life of the low-voltage battery 150.

[0069] In an exemplary embodiment, as Figure 2 As shown, the low-voltage battery 150 is also used to supply power to a third power-consuming device 251 through a third power supply line; the third power-consuming device 251 is a power-consuming device that does not require constant power;

[0070] The vehicle power supply device further includes: a sixth on-off switch 250;

[0071] The sixth on-off switch 250 is provided on the third power supply line, and is used to control the on-off of the third power supply line;

[0072] The control module 130 is connected to the sixth on-off switch 250 and is used to control the sixth on-off switch 250 to turn on the third power supply line when the low-voltage battery 150 meets the corresponding power supply conditions and the high-voltage power battery 140 meets the corresponding power supply conditions.

[0073] Specifically, if Figure 2 and Figure 3 As shown, the vehicle power supply device further includes a sixth on-off switch 250, and the control module 130 is connected to the sixth on-off switch 250, as shown in FIG. Figure 3 As shown, the sixth on-off switch 250 can be a relay. The sixth on-off switch 250 is connected to the third power supply line to control the conduction and disconnection of the third power supply line. The third power supply line supplies power to the third electrical device 251.

[0074] Specifically, the third power-consuming device 251 can be a device that does not require constant power. For example, the third power-consuming device 251 can be a high-voltage power-consuming device. In other words, the sixth on-off switch 250 can be used to connect the power supply line to the high-voltage power-consuming device, i.e., the third power supply line. Furthermore, the third power-consuming device 251 can include multiple high-voltage power-consuming devices, such as a drive motor, a high-voltage distribution board, an electric compressor, and an onboard charger.

[0075] Specifically, the high-voltage power battery 140 meeting the corresponding power supply condition may be that the high-voltage power battery 140 is in a fault-free operating state. When the low-voltage battery 150 and the high-voltage power battery 140 meet the corresponding power supply conditions, the control module 130 controls the sixth on-off switch 250 to close. After the sixth on-off switch 250 is closed, the third power supply line is connected, and the third power device 251 in the third power supply line begins to operate.

[0076] In an exemplary embodiment, the control module is connected to the ignition lock and is further configured to detect an ON signal and, if no ON signal is detected, control the low-voltage battery to enter a sleep mode. The control module is further configured to monitor the operating status of the high-voltage power battery if an ON signal is detected and, if the high-voltage power battery is operating normally, determine that the high-voltage power battery meets power supply conditions.

[0077] In actual application, before the vehicle is started, if the user needs electricity for the vehicle, the user can manually press the first on-off switch 230. After the first on-off switch 230 is closed, the first power supply circuit where the control module 130 is located is connected, and the control module 130 enters the working mode. The control module 130 performs a low-voltage battery 150 fault self-test on the low-voltage battery 150. If there is a fault in the low-voltage battery 150, a related fault prompt is given. If there is no fault in the low-voltage battery 150 self-test, the control module 130 controls the second on-off switch 240 to be closed, the second power supply circuit is connected, and the low-voltage battery 150 supplies power to the DC converter 160 connected to the second power supply circuit, and at the same time provides normal power to other low-voltage electrical equipment in the second power supply circuit, such as the ignition lock 170; Figures 1 to 3 As shown, the control module 130 is connected to the ignition lock 170, so that the control module 130 can detect the presence or absence of the ON signal. When the control module 130 detects the ON signal, it starts monitoring and management of the high-voltage power battery 140. For example, the control module 130 can determine whether the high-voltage power battery 140 meets the power supply conditions by judging whether there is an alarm message from the high-voltage power battery 140 within the second preset time period. If the high-voltage power battery 140 does not issue an alarm message within the second preset time period, it indicates that the high-voltage power battery 140 meets the corresponding power supply conditions. At this time, the control module 130 controls the sixth on-off switch 250 to close, and the third power supply line is turned on. The control module 130 controls the high-voltage power battery 140 to supply power to the third electrical equipment 251, such as a drive motor, a high-voltage distribution board, an electric compressor, etc. It needs to be further explained that after the sixth on-off switch 250 is closed, the power supply object of the low-voltage battery 150 is the control module and other control devices corresponding to the third electrical equipment 251 in the third power supply line.

[0078] The vehicle power supply device provided in this embodiment controls the power supply to high-voltage electrical equipment when both the low-voltage battery 150 and the high-voltage power battery 140 meet corresponding power supply conditions, thereby improving the power supply safety of the vehicle.

[0079] In an exemplary embodiment, as Figure 2 and Figure 3 As shown, the vehicle power supply device further includes a fifth on-off switch 260;

[0080] The second power supply line is connected to the fourth power-consuming device 261 through the fifth on-off switch 260; the ignition lock 170 is connected to the fifth on-off switch 260, and is used to control the fifth on-off switch 260 to close when the ignition lock 170 is turned to the ACC gear; the fourth power-consuming device 261 is a vehicle-mounted accessory device that can receive normal power from the second power supply line when the fifth on-off switch 260 is closed.

[0081] Specifically, the ACC gear can be connected to vehicle-mounted accessories, such as entertainment equipment.

[0082] Specifically, if Figure 3 As shown, the fifth on-off switch 260 can be a relay. Furthermore, the fifth on-off switch 260 can be an ACC relay. The output end of the second power supply circuit is connected to the ACC relay, and the ignition lock 170 is also connected to the ACC relay. When the user turns the ignition lock 170 from the LOCK position to the ACC position as needed, the coil in the ACC relay is energized and the normally open contact in the ACC relay is closed. At this time, the second power supply circuit can output ACC power to the outside through the ACC relay to supply normal power to vehicle-mounted accessories such as entertainment equipment.

[0083] The vehicle power supply device provided in this embodiment supplies normal power to the vehicle-mounted auxiliary equipment through the second power supply line, thereby meeting the diverse needs of users.

[0084] In an exemplary embodiment, the vehicle power supply further includes a backup power source;

[0085] The DC converter 160 is connected to the backup power supply and is used to supply power to the DC converter 160 when a circuit breaker fault occurs in the low-voltage battery 150 ;

[0086] The control module 130 is further configured to control the DC converter 160 to replace the low-voltage power supply for power supply when a circuit breaker fault occurs in the low-voltage battery 150 .

[0087] Specifically, the vehicle power supply device also includes a backup power supply, which is composed of capacitors and inductors and can store electricity. When the low-voltage battery 150 has a circuit breaker fault, the backup power supply can continue to supply power to the DC converter 160 to ensure the normal operation of the DC converter 160. Figure 3 As shown, the control module 130 can continue to maintain communication connection with the DC converter 160 through the CANL line and the CANH line and then control the DC converter 160 to continue to replace the low-voltage battery 150 to supply power to the corresponding electrical equipment in the corresponding power supply line.

[0088] 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 DC converter 160 .

[0089] In an exemplary embodiment, the control module 130 is also connected to the output end of the fourth on-off switch 120, and is used to monitor whether the fourth on-off switch 120 outputs normal power of the second power supply line. If the fourth on-off switch 120 does not output normal power of the second power supply line, the low-voltage battery 150 is controlled to enter sleep mode.

[0090] Specifically, if Figure 3 As shown, the ignition lock 170 is connected to the third on-off switch 110 and the fourth on-off switch 120 via the IG1 terminal. When the ignition lock 170 is turned to the ON position, the ignition lock 170 can control the third on-off switch 110 and the fourth on-off switch 120 to be closed at the same time. In this way, the normal power output in the second power supply circuit can supply power to the first power-consuming device 111 and the second power-consuming device 121 at the same time.

[0091] exist Figure 3 In the embodiment, the output ends of the control module 130 and the fourth on-off switch 120 are connected through the vehicle ON line. In this way, the control module 130 can monitor whether the fourth on-off switch 120 outputs the normal power of the second power supply circuit through the vehicle ON line. When the fourth on-off switch 120 does not output the normal power, it indicates that the third on-off switch 110 and the fourth on-off switch 120 are not closed, which further indicates that the first power-consuming device 111 and the second power-consuming device 121 do not need electricity. At this time, the control module can control the low-voltage battery 150 to enter the sleep mode, which can avoid unnecessary energy consumption of the low-voltage battery 150.

[0092] The vehicle power supply device provided in this embodiment connects the control module 130 and the output end of the fourth on-off switch 120, so that the control module 130 can monitor whether the relevant electrical equipment needs electricity. When the relevant electrical equipment no longer needs electricity, the low-voltage battery 150 is controlled to enter the sleep mode, which can save the vehicle's electricity consumption.

[0093] In an exemplary embodiment, the state parameters of the low-voltage battery 150 include 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 unit, a current acquisition unit, and a temperature acquisition unit;

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

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

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

[0097] The control module 130 is connected to the voltage acquisition unit, the current acquisition unit and the temperature acquisition unit, 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 150 meets the corresponding power supply conditions.

[0098] Specifically, the voltage acquisition unit, the current acquisition unit and the temperature acquisition unit are connected to the low-voltage battery 150. The voltage acquisition unit is connected to the control module 130 through a voltage acquisition harness, the current acquisition unit is connected to the control module 130 through a current acquisition harness, and the temperature acquisition unit is connected to the control module 130 through a temperature acquisition harness. In this way, after the control module 130 enters the working state, the voltage of the low-voltage battery can be acquired through the voltage acquisition unit, and the current of the low-voltage battery can be acquired through the current acquisition unit. Furthermore, the current of the low-voltage battery can be, for example, the discharge current of the low-voltage battery, and the temperature of the low-voltage battery can be acquired through the temperature acquisition unit. Then, the control module 130 determines whether the low-voltage battery 150 meets the corresponding power supply conditions based on the status parameters of these low-voltage batteries 150. For example, the low-voltage battery 150 meets the corresponding 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.

[0099] Specifically, the voltage acquisition unit may include a voltage sensor, the current acquisition unit may include a current sensor, and the temperature acquisition unit may include a temperature sensor. Figure 3 The current sensor 151 is shown schematically in FIG.

[0100] The vehicle power supply device provided in this embodiment can accurately detect the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the voltage of the low-voltage battery by setting a voltage acquisition unit, a current acquisition unit and a temperature acquisition unit on the low-voltage battery 150, thereby realizing accurate detection of the status parameters of the low-voltage battery 150.

[0101] In an exemplary embodiment, as Figure 2 and Figure 3 As shown, the control module 130 is further configured to:

[0102] When the first on-off switch 230 turns on the first power supply line, after the control module 130 enters the working mode, it controls the low-voltage battery 150 to perform a self-test; if it is determined based on the self-test result of the low-voltage battery 150 that the low-voltage battery 150 has no fault, the DC converter 160 is controlled to perform a self-test; if it is determined based on the self-test result of the DC converter 160 that the DC converter 160 has no fault, the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery are obtained; if it is determined based on the self-test result of the low-voltage battery 150 that the low-voltage battery 150 has a fault, a fault prompt is given; if it is determined based on the self-test result of the DC converter 160 that the DC converter 160 has a fault, a fault prompt is given.

[0103] Specifically, after the first on-off switch 230 is closed, the first power supply circuit is turned on, and the control module 130 connected to the first power supply circuit enters the working mode. The control module 130 controls the low-voltage battery 150 to perform self-inspection, that is, fault detection of the low-voltage battery 150 itself. If the low-voltage battery 150 has a fault, the control module 130 generates a corresponding signal to provide a fault prompt. For example, the fault light can be controlled to light up, so that the user can troubleshoot the fault in time, or the fault prompt information can be sent to the control panel of the car through the CAN bus for prompting, so as to ensure the power supply safety of the vehicle power supply device.

[0104] If the low-voltage battery 150 has no faults, the control module 130 controls the DC converter 160 to perform self-inspection. If the self-inspection result of the DC converter 160 is a fault, a fault prompt is also given. If the self-inspection result of the DC converter 160 is no fault, the control module 130 continues to obtain status parameters such as the low-voltage battery voltage, the low-voltage battery current and the low-voltage battery temperature in real time, and is used to determine whether the low-voltage battery 150 meets the corresponding power supply conditions based on these status parameters of the low-voltage battery 150.

[0105] This embodiment can ensure the power supply safety of the vehicle power supply device by performing corresponding fault self-tests on the low-voltage battery 150 and the DC converter 160.

[0106] 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 power supply line, a second power supply line and a third power supply line.

[0107] In the first power supply circuit, the first on-off switch 230 is connected between the negative power supply terminal of the control module 130 and the low-voltage battery 150. The positive power supply terminal of the low-voltage battery 150 is connected to the positive terminal of the low-voltage battery 150. The three can form a first power supply circuit. When the first on-off switch 230 is closed, the first power supply circuit is connected, and the low-voltage battery 150 begins to power the control module 130, and the control module 130 enters the working mode. The low-voltage battery 150 can be, for example, a 24V low-voltage lithium battery.

[0108] In the second power supply circuit, the positive electrode of the low-voltage battery 150 is connected to the second on-off switch 240, and the control module 130 is connected to the second on-off switch 240. The control module 130 can control the on and off of the second power supply circuit. When the second on-off switch 240 is closed, the low-voltage battery 150 uses the output terminals of the second power supply circuit (i.e., the 24V positive output terminal and the 24V negative output terminal) to output normal power through the first fuse 152. The 24V positive output end of the second power supply circuit is connected to the ignition lock 170 through the ignition lock fuse 172 to supply power to the ignition lock 170 when the second power supply circuit is turned on; the 24V positive output end of the second power supply circuit is connected to the third on-off switch 110 through the third on-off switch fuse 112 to supply power to the third on-off switch 110 when the second power supply circuit is turned on; the 24V positive output end of the second power supply circuit is connected to the fourth on-off switch 120 through the fourth on-off switch fuse 122 to supply power to the fourth on-off switch 120 when the second power supply circuit is turned on; the 24V positive output end of the second power supply circuit is also connected to the fifth on-off switch 260 to supply power to the fifth on-off switch 260 when the second power supply circuit is turned on; the 24V positive output end of the second power supply circuit is connected to the DC converter 160 to supply power to the DC converter 160 when the second power supply circuit is turned on.

[0109] In addition, the ignition lock 170 includes LOCK gear, ON gear, ACC gear and ST gear. The B1 end and B2 end of the ignition lock 170 are connected to the 24V positive output end of the second power supply circuit through the ignition lock fuse 172, and are used to receive normal power output. The ON gear of the ignition lock 170 is connected to the third on-off switch 110, and the ON gear of the ignition lock 170 is also connected to the fourth on-off switch 120. In this way, when the ignition lock 170 is switched from the LOCK gear to the ON gear, the ignition lock 170 can simultaneously control the third on-off switch 110 and the fourth on-off switch 120 to close. After the third on-off switch 110 is closed, the second power supply circuit outputs the first ON power through the third on-off switch 110, which is used to power the first electrical equipment 111, that is, the electrical equipment related to driving safety. After the fourth on-off switch 120 is closed, the second power supply circuit outputs the first ON power through the fourth on-off switch 120. The second ON power is output for powering the second electrical equipment 121, that is, the electrical equipment not related to driving safety; the ACC gear of the ignition lock 170 is connected to the fifth on-off switch 260. When the ignition lock 170 is turned from the LOCK gear to the ACC gear, the ignition lock 170 controls the fifth on-off switch 260 to close, and the second power supply line outputs ACC power through the fifth on-off switch 260 for providing regular power to the fourth electrical equipment 261, such as entertainment equipment; when the ignition lock 170 is turned from the LOCK gear to the ST gear, a vehicle start signal is output through the ST end of the ignition lock 170 to start the engine.

[0110] The control module 130 is also connected to the fourth on-off switch 120 via the vehicle ON line, and is used to detect whether there is a normal power output in the fourth on-off switch 120. The DC converter 160 is connected to the high-voltage power battery 140 via the high-voltage input positive line and the high-voltage input negative line. When the control module 130 recognizes that the low-voltage battery 150 meets the corresponding charging conditions, it converts the high-voltage voltage output by the high-voltage power battery 140 into a target voltage, such as 24V voltage, to charge the low-voltage battery 150; the low-voltage battery 150 is provided with a voltage sensor, a current sensor 151 and a temperature sensor (the voltage sensor and the temperature sensor are arranged inside the low-voltage battery 150, Figure 3 (not shown in the figure), the control module 130 is connected to the voltage sensor, the current sensor 151 and the temperature sensor through the voltage acquisition harness, the current acquisition harness and the temperature acquisition harness respectively to obtain the status parameters of the low-voltage battery 150; the DC converter 160 is connected to the output end of the second power supply circuit. On the one hand, the DC converter 160 is powered by the second power supply circuit. On the other hand, when the low-voltage battery 150 fails, the DC converter 160 converts the output voltage of the high-voltage power battery 140 into 24V voltage to replace the low-voltage battery 150 to continue to provide normal power for the vehicle.

[0111] In the third power supply circuit, the positive electrode of the low-voltage battery 150 is connected to the sixth on-off switch 250, and the control module 130 is connected to the sixth on-off switch 250. The control module 130 controls the on and off of the third power supply circuit. When the ignition lock 170 is turned from the LOCK position to the ON position, the ignition lock 170 controls the closing of the fourth on-off switch 120. The fourth on-off switch 120 is connected to the control module 130 via the vehicle ON line, so the control module 130 can detect the ON signal. When the control module 130 detects the ON signal and the high-voltage power battery 140 meets the corresponding power supply conditions, the control module 130 controls the closing of the sixth on-off switch 250. After the sixth on-off switch 250 is closed, the third power supply circuit is connected, and the low-voltage battery 150 supplies power to the corresponding control module of the third power device 251 in the third power supply circuit. The high voltage voltage used by the third power device 251 itself is supplied by the high-voltage power battery 140. It needs to be explained that the second fuse 252 is a general term for several fuses. Each second fuse 252 is connected to the corresponding third electrical device 251, so the fusing current of each second fuse 252 is not exactly the same and is related to the third electrical device 251 corresponding to the second fuse 252.

[0112] The control module 130 and the DC converter 160 are connected via an internal CANH line and an internal CANL line for data exchange.

[0113] 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 switch of the low-voltage battery 150 is pressed manually for, for example, 3 seconds. The power switch is the first on-off switch 230, and the control module 130 enters the working mode. The low-voltage battery 150 self-checks. If the low-voltage battery 150 has a fault, the fault light will be on to indicate the fault. If the low-voltage battery 150 has no fault, the control module 130 wakes up the DC converter 160 through the CAN line. The DC converter 160 self-checks. If the DC converter 160 has a fault, the fault light will be on to indicate the fault. If the DC converter 160 has no fault, the control module 130 collects the voltage of the low-voltage battery in real time. , the current of the low-voltage battery and the temperature of the low-voltage battery, the control module 130 controls the second on-off switch 240 to be closed, the normal power output end of the low-voltage battery 150 distributes normal power to the vehicle through the first fuse 152, wherein the normal power output end is the 24V positive output end and the 24V negative output end, the ignition lock 170 is connected to the normal power output end through the ignition lock fuse 172, the low-voltage battery 150 supplies normal power to the ignition lock 170, the ignition lock 170 includes different gears, such as LOCK gear, ON gear, ST gear and ACC gear, the user can adjust the ignition lock 170 from LOCK gear to ON gear as needed. When the gear is shifted to the ACC gear, the ignition lock 170 controls the fifth on-off switch 260 to be closed through a hard line, and the low-voltage battery 150 supplies power to the entertainment device in the ACC gear; when the user shifts the ignition lock 170 from the LOCK gear to the ST gear as needed, the vehicle starts; when the user shifts the ignition lock 170 from the LOCK gear to the ON gear as needed, the ignition lock 170 controls the third on-off switch 110 and the fourth on-off switch 120 to be closed through a hard line, and the third on-off switch 110 supplies the first ON power to the control module related to driving safety, and the fourth on-off switch 120 supplies the second ON power to the control module not related to driving safety. ON power; the control module 130 can also detect the ON signal. If there is no ON signal, the low-voltage battery 150 is controlled to enter the sleep mode. If there is an ON signal, the control module 130 starts the monitoring and management of the high-voltage power battery 140. At the same time, the control module 130 exchanges data with the vehicle through the vehicle CAN line. The control module 130 detects whether the high-voltage power battery 140 has a fault. If the high-voltage power battery 140 has a fault, the fault is eliminated. If the high-voltage power battery 140 has no fault, the control module 130 controls the sixth on-off switch 250 to close, and the low-voltage battery 150 supplies power to the entire vehicle.

[0114] In addition, the control module 130 exchanges data with the entire vehicle and the DC converter 160 through the CAN line. In this way, when a circuit breaker fault occurs in the low-voltage battery 150, the control module 130 activates and controls the DC converter 160 through CAN bus instructions to replace the low-voltage battery 150 to continue to power the entire vehicle.

[0115] like Figure 5As shown, when the low-voltage battery 150 supplies power to the entire vehicle, the control module 130 calculates the remaining power of the low-voltage battery in real time based on the status parameters of the low-voltage battery 150. When the remaining power of the low-voltage battery is less than 30% or when the current of the low-voltage battery (i.e., the discharge current of the low-voltage battery) is greater than 20A, the control module 130 activates the DC converter 160 through hard-line control. After the DC converter 160 is activated, the high-voltage voltage output by the high-voltage power battery 140 is converted into a target voltage by the DC converter 160 to charge the low-voltage battery 150. Charging stops when the remaining power of the low-voltage battery is greater than or equal to 95%; when the control module 130 does not detect the ON gear signal for more than 5 seconds, the control module 130 controls the low-voltage battery 150 to enter the sleep mode again, and the low-voltage battery 150 only outputs normal power; when the vehicle needs to be parked for a long time, the user presses and holds the power switch of the low-voltage battery 150, for example, for 5 seconds, and the low-voltage battery 150 no longer supplies power to the outside, the control module 130 stops working, and the vehicle's power consumption ends.

[0116] 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.

[0117] 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:

[0118] Step 610: The control module 130 enters the working mode when the first on-off switch 230 turns on the first power supply line. If the low-voltage battery 150 meets the power supply condition, the control module 130 controls the second on-off switch 240 to turn on the second power supply line.

[0119] Step 620 : If the high-voltage power battery 140 meets the power supply condition, the control module 130 controls the DC converter 160 to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the status parameters of the low-voltage battery.

[0120] In an exemplary embodiment, the vehicle power supply device further includes an ignition lock; the second power supply line is connected to the ignition lock, connected to the first power device via the third on-off switch, and connected to the second power device via the fourth on-off switch; the ignition lock is connected to the third on-off switch and the fourth on-off switch;

[0121] When the ignition lock is turned to the ON position, the third on-off switch and the fourth on-off switch are controlled to be closed.

[0122] In an exemplary embodiment, the low-voltage battery 150 is further used to supply power to a third power-consuming device 251 via a third power supply line. The third power-consuming device 251 is a power-consuming device that does not require constant power. The vehicle power supply device further includes a sixth on-off switch 250. The sixth on-off switch 250 is provided on the third power supply line and is used to control the on-off of the third power supply line. The vehicle power supply method may further include:

[0123] When the low-voltage battery 150 meets the corresponding power supply conditions and the high-voltage power battery 140 meets the corresponding power supply conditions, the control module 130 controls the sixth on-off switch 250 to turn on the third power supply line.

[0124] In an exemplary embodiment, the vehicle power supply device also includes a fifth on-off switch 260; the second power supply line is connected to the fourth power-consuming device 261 through the fifth on-off switch 260; the ignition lock 170 is connected to the fifth on-off switch 260, and is used to control the fifth on-off switch 260 to close when the ignition lock 170 is turned to the ACC gear; the fourth power-consuming device 261 is a vehicle-mounted accessory device, which can receive normal power from the second power supply line when the fifth on-off switch 260 is closed.

[0125] In an exemplary embodiment, the vehicle power supply device further includes a backup power supply; the DC converter 160 is connected to the backup power supply and is configured to supply power to the DC converter 160 when a circuit breaker fault occurs in the low-voltage battery 150; and the vehicle power supply method may further include:

[0126] When a circuit breaker fault occurs in the low-voltage battery 150 , the control module 130 controls the DC converter 160 to replace the low-voltage power supply for power supply.

[0127] In an exemplary embodiment, the vehicle power supply method may further include:

[0128] The control module 130 monitors whether the fourth on-off switch 120 outputs the normal power of the second power supply line. If the fourth on-off switch 120 does not output the normal power of the second power supply line, the control module 130 controls the low-voltage battery 150 to enter the sleep mode.

[0129] In an exemplary embodiment, the state parameters of the low-voltage battery 150 include 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 includes a voltage acquisition unit, a current acquisition unit, and a temperature acquisition unit; the voltage acquisition unit is used to acquire the voltage of the low-voltage battery; the current acquisition unit is used to acquire the current of the low-voltage battery; and the temperature acquisition unit is used to acquire the temperature of the low-voltage battery. The vehicle power supply method may further include:

[0130] The control module 130 obtains the voltage, current and temperature of the low-voltage battery through the voltage acquisition unit, the current acquisition unit and the temperature acquisition unit; based on the voltage, current and temperature of the low-voltage battery, determines whether the low-voltage battery 150 meets the corresponding power supply conditions.

[0131] In an exemplary embodiment, the vehicle power supply method may further include:

[0132] After the control module 130 enters the working mode when the first on-off switch 230 turns on the first power supply line, it controls the low-voltage battery 150 to perform a self-test; if it is determined based on the self-test result of the low-voltage battery 150 that the low-voltage battery 150 has no fault, it controls the DC converter 160 to perform a self-test; if it is determined based on the self-test result of the DC converter 160 that the DC converter 160 has no fault, the voltage of the low-voltage battery, the current of the low-voltage battery and the temperature of the low-voltage battery are obtained; if it is determined based on the self-test result of the low-voltage battery 150 that the low-voltage battery 150 has a fault, a fault prompt is given; if it is determined based on the self-test result of the DC converter 160 that the DC converter 160 has a fault, a fault prompt is given.

[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] Specifically, the vehicle in this embodiment may be an electric vehicle, such as a pure electric vehicle, or an electric working machine, such as an electric crane and an electric excavator.

[0135] Figure 7 An example of a physical structure diagram of an electronic device is shown below. Figure 7 As shown, the electronic device may include: a processor 710, a communication interface 820, a memory 730, and a communication bus 740, wherein the processor 710, the communication interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 may call the logic instructions in the memory 730 to execute the vehicle power supply method provided in any of the above embodiments, which includes:

[0136] Entering a working mode when the first on-off switch turns on the first power supply line, and if the low-voltage battery meets the power supply condition, controlling the second on-off switch to turn on the second power supply line;

[0137] If the high-voltage power battery meets the power supply conditions, based on the state parameters of the low-voltage battery, the DC converter is controlled to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery.

[0138] In addition, the logic instructions in the above-mentioned memory 730 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0139] In another aspect, the present invention further provides a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions. When the program instructions are executed by a computer, the computer is capable of performing the vehicle power supply method provided in any of the above embodiments, the method comprising:

[0140] Entering a working mode when the first on-off switch turns on the first power supply line, and if the low-voltage battery meets the power supply condition, controlling the second on-off switch to turn on the second power supply line;

[0141] If the high-voltage power battery meets the power supply conditions, based on the state parameters of the low-voltage battery, the DC converter is controlled to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery.

[0142] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the vehicle power supply method provided in any one of the above embodiments is implemented, the method comprising:

[0143] Entering a working mode when the first on-off switch turns on the first power supply line, and if the low-voltage battery meets the power supply condition, controlling the second on-off switch to turn on the second power supply line;

[0144] If the high-voltage power battery meets the power supply conditions, based on the state parameters of the low-voltage battery, the DC converter is controlled to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery.

[0145] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. That is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0146] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or certain parts of the embodiment.

[0147] 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: A first on-off switch provided on the first power supply line, a second on-off switch provided on the second power supply line, and a control module, a high-voltage power battery, a low-voltage battery, a DC converter, and an ignition lock integrated in the same box. The control module is connected to the high-voltage power battery, the low-voltage battery and the DC converter respectively; the DC converter is also connected to the high-voltage power battery and the low-voltage battery respectively; The low-voltage battery is used to supply power to the control module through the first power supply line and to provide normal power through the second power supply line; the DC converter is powered by the second power supply line; The control module is configured to enter a working mode when the first on-off switch turns on the first power supply line, and control the second on-off switch to turn on the second power supply line if the low-voltage battery meets the power supply condition; When the high-voltage power battery meets the corresponding power supply condition, based on the state parameters of the low-voltage battery, controlling the DC converter to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery; The second power supply circuit is connected to the ignition lock, connected to the first electrical device via the third on-off switch, and connected to the second electrical device via the fourth on-off switch; the ignition lock is connected to the third on-off switch and the fourth on-off switch, and is used to control the third on-off switch and the fourth on-off switch to be closed when the ignition lock is turned to the ON position; The first electrical device is an electrical device related to driving safety and is capable of receiving normal power from the second power supply line when the third switch is closed; The second electrical equipment is an electrical equipment not related to driving safety and can receive the normal power output by the second power supply line when the fourth switch is closed.

2. The vehicle power supply device according to claim 1, characterized in that: The control module is connected to the ignition lock and is further used to: Detect ON signal; If no ON signal is detected, the low-voltage battery is controlled to enter a sleep mode.

3. The vehicle power supply device according to claim 2, characterized in that: The control module is further configured to: If an ON signal is detected, monitoring the operating status of the high-voltage power battery; If the operating state of the high-voltage power battery is normal, it is determined that the high-voltage power battery meets the power supply condition.

4. The vehicle power supply device according to claim 1, characterized in that: Also included is a fifth on-off switch; The second power supply line is connected to the fourth power-consuming device via the fifth on-off switch; the ignition lock is connected to the fifth on-off switch, and is used to control the fifth on-off switch to be closed when the ignition lock is turned to the ACC position; The fourth power-consuming device is an on-vehicle accessory device capable of receiving normal power from the second power supply line when the fifth switch is closed.

5. The vehicle power supply device according to claim 1, characterized in that: The control module is also connected to the output end of the fourth on-off switch, and is used to monitor whether the fourth on-off switch outputs the normal power of the second power supply circuit. If the fourth on-off switch does not output the normal power of the second power supply circuit, the low-voltage battery is controlled to enter the sleep mode.

6. The vehicle power supply device according to any one of claims 1 to 5, characterized in that: The low-voltage battery is also used to supply power to a third electrical device through a third power supply line; the third electrical device is an electrical device that does not require constant power; The vehicle power supply device further includes: a sixth on-off switch; The sixth on-off switch is provided on the third power supply line, and is used to control the on-off of the third power supply line; The control module is connected to the sixth on-off switch and is configured to control the sixth on-off switch to turn on the third power supply line when the low-voltage battery meets the corresponding power supply conditions and the high-voltage power battery meets the corresponding power supply conditions.

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 control module enters a working mode when the first on-off switch turns on the first power supply line, and controls the second on-off switch to turn on the second power supply line if the low-voltage battery meets the power supply condition; If the high-voltage power battery meets the power supply condition, the control module controls the DC converter to convert the voltage of the high-voltage power battery into a target voltage to charge the low-voltage battery based on the state parameters of the low-voltage battery; When the ignition lock is turned to the ON position, the third on-off switch and the fourth on-off switch are controlled to be closed; The first electrical device is an electrical device related to driving safety and is capable of receiving normal power from the second power supply line when the third switch is closed; The second electrical equipment is an electrical equipment not related to driving safety and can receive the normal power output by the second power supply line when the fourth switch is closed.

8. The vehicle power supply method according to claim 7, characterized in that: include: When the ignition lock is turned to the ON position, the third on-off switch and the fourth on-off switch are controlled to be closed.

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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