Energy distribution method and device of hybrid power distribution system and hybrid power distribution system

Abstract

The invention relates to the technical field of energy distribution, and discloses an energy distribution method and device of a hybrid power distribution system and the hybrid power distribution system.The method comprises the steps that the power-on ignition state of a vehicle, the charge states of a 48V storage battery and a 12V storage battery and the power load of a load end are obtained; determining the current hybrid power distribution management strategy as a quiescent current management strategy, a power management strategy or a load level-to-level management strategy according to the power-on ignition state of the vehicle; and based on the current hybrid power distribution management strategy, adjusting the power supply modes of the DCDC, the 48V storage battery and the 12V storage battery to the load end according to the charge state and the power load, and performing hierarchical dynamic management on the load end. According to the invention, a comprehensive power supply strategy of hierarchical energy distribution management, load hierarchical dynamic adjustment and static current management can be established, the power supply mode is accurately and flexibly adjusted, the load is flexibly controlled, and stable power supply is provided for the load, so that the power consumption of the whole vehicle is finely adjusted and reduced, and the optimal utilization of the energy of the whole vehicle is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy distribution, in particular to an energy distribution method and device of a hybrid power distribution system and the hybrid power distribution system. BACKGROUND

[0002] Current new energy vehicles still use a 12V low-voltage power supply system. Although this system is mature and low in cost, it cannot meet the power demand of growing high-power loads on vehicles, such as electronic water pumps, PTCs, electric compressors, and electric braking systems, and thus a 48V low-voltage power supply is required to meet the power demand of the loads. Therefore, the energy distribution and management of the whole vehicle need to be optimized after 48V hybrid power distribution to ensure optimal use of the energy of the power supply system.

[0003] In the prior art, when 12V and 48V hybrid power supply is used, redundant power supply is usually performed according to a main-backup power supply mode, and the energy distribution of the whole vehicle is not optimized and managed. Therefore, the power supply mode is not flexible, and optimal use of energy cannot be achieved. SUMMARY

[0004] Therefore, the present application provides an energy distribution method and device of a hybrid power distribution system and the hybrid power distribution system to solve the problem of inflexible hybrid power supply.

[0005] In a first aspect, the present application provides an energy distribution method of a hybrid power distribution system. The hybrid power distribution system includes a power supply end and a load end. The power supply end includes a DCDC, a 48V storage battery, and a 12V storage battery. The load end is divided according to a preset priority. The method includes: obtaining a vehicle power-on ignition state, a first state of charge of the 48V storage battery, a second state of charge of the 12V storage battery, and a power load of the load end; determining a current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state, wherein the current hybrid power distribution management strategy includes a static current management strategy, a power management strategy, and a load classification management strategy; adjusting the power supply mode of the DCDC, the 48V storage battery, and the 12V storage battery to the load end based on the current hybrid power distribution management strategy according to the first state of charge, the second state of charge, and the power load; and performing hierarchical dynamic management on the load end based on the preset priority.

[0006] The application provides an energy distribution method of a hybrid power distribution system, which comprises the following steps: determining a current hybrid power distribution management strategy of the hybrid power distribution system according to a vehicle power-on ignition state, the current hybrid power distribution management strategy being a static current management strategy, a power management strategy or a load grading management strategy; adjusting a power supply mode of a DCDC, a 48V storage battery and a 12V storage battery to a load end based on a state of charge of the 48V storage battery and the 12V storage battery and a power load of the load end according to the current hybrid power distribution management strategy; and performing grading dynamic management on the load end based on a preset priority.

[0007] In an optional embodiment, the current hybrid power distribution management strategy of the hybrid power distribution system is determined according to the vehicle power-on ignition state, and the current hybrid power distribution management strategy is determined as the static current management strategy if the vehicle power-on ignition state is in a complete-off gear, as the load grading management strategy if the vehicle power-on ignition state is in an ignition switch-on gear but a high-voltage system is not turned on, or as the power management strategy if the vehicle power-on ignition state is in the ignition switch-on gear and the high-voltage system is turned on or in a running state.

[0008] The application can perform targeted hybrid power distribution management according to actual running conditions by using different management strategies in different working states, so as to meet actual power consumption requirements in different working states by energy-optimized distribution and ensure normal running of the vehicle.

[0009] In an optional embodiment, if the current hybrid power distribution management strategy is the load grading management strategy, the power supply mode of the DCDC, the 48V storage battery and the 12V storage battery to the load end is adjusted based on the current hybrid power distribution management strategy according to the first state of charge, the second state of charge and the power load, and the load end is managed in a grading manner based on the preset priority, which comprises the following steps: determining whether there is a power load, and if there is, supplying power to the power-consuming equipment of the load end by the 48V storage battery and the 12V storage battery in a preset power supply mode, and not supplying power to the power-consuming equipment of the load end by the DCDC; during the power supply process, detecting whether the state of charge is lower than a preset state of charge threshold, and if the first state of charge is lower than a first state of charge threshold and / or the second state of charge is lower than a second state of charge threshold, sending a turn-on request of the DCDC; if the DCDC is not turned on, grading shutting down the power-consuming equipment of the load end according to the preset priority, and if the DCDC is turned on, charging the 48V storage battery and / or the 12V storage battery by the DCDC.

[0010] The application can ensure normal operation of other related functions when the vehicle is not running by supplying power to the load by the low-voltage battery when the DCDC is not connected, and can request high-voltage DCDC charging or shut down unnecessary loads when the low-voltage battery is low to ensure the normal operation of the core function and avoid low-voltage battery depletion.

[0011] In an alternative embodiment, after the DCDC is still not connected, further comprising: if the second state of charge is lower than the second state of charge threshold, and the first state of charge is higher than the third state of charge threshold, the 48V battery is used to reverse charge the 12V battery; if the first state of charge is lower than the first state of charge threshold, and the second state of charge is higher than the fourth state of charge threshold, the power supply by the 48V battery is switched to the power supply by the 12V battery.

[0012] The application can build a bidirectional energy flow + dynamic master-slave switching architecture by reverse energy compensation between the two low-voltage batteries, break the master-slave power supply mode, realize dual-redundancy power supply, and ensure the normal operation of the vehicle.

[0013] In an alternative embodiment, if the current hybrid power distribution management strategy is a power management strategy, the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end is adjusted based on the current hybrid power distribution management strategy according to the first state of charge, the second state of charge and the power load, and the load end is dynamically managed based on the preset priority, including: if the power load is lower than the first load threshold, the first state of charge is higher than the third state of charge threshold, and the second state of charge is higher than the fourth state of charge threshold, the 48V battery and the 12V battery supply power to the electrical equipment of the load end according to the preset power supply mode, and the DCDC does not supply power to the electrical equipment of the load end; if at least one of the power load is higher than the second load threshold, or the first state of charge is lower than the first state of charge threshold and the second state of charge is lower than the second state of charge threshold, the DCDC supplies power to the electrical equipment of the load end and charges the 48V battery and / or the 12V battery; if the power load is higher than the third load threshold, the DCDC, the 48V battery and the 12V battery supply power to the electrical equipment of the load end according to the preset power supply mode, and when the first state of charge is lower than the first state of charge threshold and / or the second state of charge is lower than the second state of charge threshold, the electrical equipment of the load end is shut down according to the preset priority.

[0014] The application can adjust the power supply mode according to the actual operation of the vehicle by detecting the load power and the low-voltage battery power during vehicle running, realize optimal energy distribution, and thus provide stable power supply for the load and ensure the normal operation of various functions of the vehicle.

[0015] In an alternative embodiment, if the power load is higher than the second load threshold, or at least one of the first state of charge is lower than the first state of charge threshold and the second state of charge is lower than the second state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 48V battery and / or the 12V battery, including: if the first state of charge is lower than the first state of charge threshold and the second state of charge is higher than the second state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 48V battery; if the second state of charge is lower than the second state of charge threshold and the first state of charge is higher than the first state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 12V battery, or switches from 12V battery power supply to 48V battery power supply and charges the 12V battery with the 48V battery; if the first state of charge is lower than the first state of charge threshold and the second state of charge is lower than the second state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 48V battery and the 12V battery.

[0016] The application can avoid low-voltage battery power shortage by charging the low-power battery during vehicle driving, thereby ensuring stable power supply for the load.

[0017] In an alternative embodiment, if the current hybrid power distribution management strategy is a static current management strategy, the DCDC, 48V battery and 12V battery supply power to the load end based on the first state of charge, second state of charge and power load according to the current hybrid power distribution management strategy, and the load end is dynamically managed based on the preset priority, and further comprising: judging the grade of the first state of charge or the second state of charge, wherein the state of charge corresponding to the first grade, second grade and third grade gradually decreases; if the first state of charge or the second state of charge is in the first grade, the first state of charge or the second state of charge is obtained according to the preset long period, and the grade of the first state of charge or the second state of charge is judged; if the first state of charge or the second state of charge is in the second grade, the first state of charge or the second state of charge is obtained according to the preset short period, and the grade of the first state of charge or the second state of charge is judged; if the first state of charge or the second state of charge is in the third grade, it is judged whether the high-voltage battery state meets the charging condition, if yes, the DCDC charges the 48V battery and / or the 12V battery, otherwise an alarm prompt is generated.

[0018] The application can timely supplement the low-voltage battery and keep the battery in the best state at all times by detecting the battery power when the whole vehicle is in static sleep, thereby avoiding long-term parking of the small battery.

[0019] In a second aspect, the present application provides an energy distribution device of a hybrid power distribution system, the hybrid power distribution system comprising a power supply end and a load end, the power supply end comprising a DCDC, a 48V battery and a 12V battery, the load end being divided according to a preset priority, the device comprising: an information acquisition module, configured to acquire a vehicle power-on ignition state, a first state of charge of the 48V battery, a second state of charge of the 12V battery and a power load of the load end; a strategy determination module, configured to determine a current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state, wherein the current hybrid power distribution management strategy comprises a static current management strategy, a power management strategy and a load grading management strategy; and an energy distribution module, configured to adjust a power supply mode of the DCDC, the 48V battery and the 12V battery to the load end according to the first state of charge, the second state of charge and the power load based on the current hybrid power distribution management strategy, and to perform a grading dynamic management on the load end based on the preset priority.

[0020] In a third aspect, the present application provides a computer device, comprising a memory and a processor, the memory and the processor being communicatively connected with each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the energy distribution method of the hybrid power distribution system according to the first aspect or any one of the corresponding embodiments thereof.

[0021] In a fourth aspect, the present application provides a hybrid power distribution system, comprising: a driver cabin system, configured to acquire a user control demand; an energy management system, configured to perform the energy distribution method of the hybrid power distribution system according to the first aspect or any one of the corresponding embodiments thereof based on the control demand; and a control execution system, pre-built as a hybrid power distribution architecture, the hybrid power distribution architecture comprising a power supply end and a load end, the power supply end being a layered energy distribution architecture, comprising a DCDC, a 48V battery and a 12V battery, the load end being divided according to a preset priority, and the power supply end supplying power to the load end based on the control of the energy management system.

[0022] The present application has the following beneficial effects:

[0023] (1) The present application establishes a comprehensive power supply strategy of layered energy distribution management + load grading dynamic adjustment + static current management, can accurately and flexibly adjust the power supply mode according to the actual operation condition, flexibly controls the load, provides stable power supply for the load, reduces the whole vehicle power consumption through fine adjustment, and realizes the optimal utilization of the whole vehicle energy;

[0024] (ii) The application can ensure the normal operation of other related functions when the vehicle is not running by supplying power to the load from the low-voltage battery when the DCDC power supply is not connected, and can request high-voltage DCDC charging or turn off unnecessary loads when the low-voltage battery is low, ensuring the normal operation of core functions and avoiding low-voltage battery depletion.

[0025] (iii) The application can adjust the power supply mode according to the actual operation of the vehicle by detecting the load power and the low-voltage battery power during vehicle operation, realize optimal energy distribution, and provide stable power supply for the load, ensuring the normal operation of various functions of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0027] Figure 1 is a flowchart of the energy distribution method of the hybrid power distribution system according to an embodiment of the present application;

[0028] Figure 2 is a structural block diagram of the hybrid power distribution system according to an embodiment of the present application;

[0029] Figure 3 is a strategy switching diagram of the energy distribution method of the hybrid power distribution system according to an embodiment of the present application;

[0030] Figure 4 is a load grading diagram of the energy distribution method of the hybrid power distribution system according to an embodiment of the present application;

[0031] Figure 5 is a flowchart of another energy distribution method of another hybrid power distribution system according to an embodiment of the present application;

[0032] Figure 6 is a load grading management strategy flowchart of another energy distribution method of another hybrid power distribution system according to an embodiment of the present application;

[0033] Figure 7 is a load grading shutdown strategy flowchart of another energy distribution method of another hybrid power distribution system according to an embodiment of the present application;

[0034] Figure 8 is a flowchart of another energy distribution method of another hybrid power distribution system according to an embodiment of the present application;

[0035] Figure 9 is a power management strategy flowchart of an energy distribution method of yet another hybrid power distribution system according to an embodiment of the present application;

[0036] Figure 10 is a flowchart of an energy distribution method of yet another hybrid power distribution system according to an embodiment of the present application;

[0037] Figure 11 is a static current management strategy flowchart of an energy distribution method of yet another hybrid power distribution system according to an embodiment of the present application;

[0038] Figure 12 is a structural block diagram of an energy distribution device of a hybrid power distribution system according to an embodiment of the present application;

[0039] Figure 13 is a hardware structure schematic diagram of a computer device of an embodiment of the present application. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions and advantages of embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0041] Embodiments of the present application are applicable to scenarios of hybrid power distribution management of vehicles deployed with 12V storage batteries and 48V storage batteries. Embodiments of the present application provide an energy distribution method of a hybrid power distribution system, which adjusts power supply and load based on multiple hybrid power distribution management strategies to achieve flexible optimization and management of vehicle energy distribution and the effect of energy optimization and utilization.

[0042] According to an embodiment of the present application, an energy distribution method of a hybrid power distribution system is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0043] In this embodiment, an energy distribution method of a hybrid power distribution system is provided, which can be used in the energy management system in the vehicle hybrid power distribution system, Figure 1 is a flowchart of an energy distribution method of a hybrid power distribution system according to an embodiment of the present application, as Figure 1 shown, the flow includes the following steps:

[0044] In step S101, the on-vehicle power-on ignition state, the first state of charge of the 48V battery, the second state of charge of the 12V battery and the power load of the load end are acquired.

[0045] Specifically, in the embodiment of the present application, as shown in the figure, Figure 2 The mixed power distribution system includes a driver cabin system, an energy management system and a control execution system. The user controls the vehicle through the driver cabin system, including speed control, steering control, air conditioning control, music and light control, etc. The energy management system is the top-level control, responsible for optimizing energy flow, maintaining the charge state within a certain range, receiving and processing the user's control requirements and the real-time information of the vehicle, distributing the optimal set value of energy according to the energy reserve of the whole vehicle, and transmitting to the bottom control execution unit, as well as the wake-up and sleep control of each controller to prevent unnecessary energy consumption caused by false wake-up. The control execution system is the bottom control, in which the power system corresponds to the power supply end, including DCDC, 48V battery and 12V battery, which supplies power to the load end to realize the whole vehicle power control, and the chassis system, thermal management system and vehicle body system realize the real-time control of the corresponding loads such as chassis and thermal management.

[0046] In some optional embodiments, the DCDC corresponds to a DCDC (Direct Current-Direct Current) converter, which mainly converts the direct current of the high-voltage system of the vehicle (such as the power battery on a pure electric vehicle or a hybrid vehicle, usually with a voltage of several hundred volts) into direct current suitable for the low-voltage electrical system of the vehicle, which can charge the 48V battery and the 12V battery, and also can supply power to numerous 12V or 48V low-voltage electrical equipment on the vehicle, such as interior lighting, audio system, vehicle computer, window lifting motor, etc. The 48V battery and the 12V battery are low-voltage batteries. The 12V battery is the core power supply of the low-voltage electrical system of the vehicle, which can provide power for the electronic control system, ignition system, lighting system, audio system, etc. of the vehicle, to ensure that the vehicle can start normally and the basic functions can run. Compared with the 12V battery, the 48V battery can provide more power support, which can assist the engine start, provide power for the motor under the conditions of vehicle starting, acceleration, etc., assist the engine work, reduce the load of the engine, and thus realize better fuel economy and power performance. Based on the above-mentioned mixed power supply of DCDC, 48V battery and 12V battery, in order to comprehensively manage the energy distribution, the actual running conditions of the vehicle need to be acquired, including the on-vehicle power-on ignition state, the state of charge of the 48V battery and the 12V battery, i.e. the power load of the load end, so as to optimize the distribution of energy based on the hierarchical energy distribution architecture.

[0047] Step S102, determining the current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state, wherein the current hybrid power distribution management strategy includes: a static current management strategy, a power management strategy and a load grading management strategy.

[0048] Specifically, in the embodiments of the present application, the static current management strategy, the power management strategy or the load grading management strategy is set in advance according to the actual operation requirements of the vehicle, and different strategies are used as the current hybrid power distribution management strategy under different power-on ignition states of the vehicle. The vehicle power-on ignition state includes: ① OFF is a complete OFF gear, representing that the vehicle power supply is in an OFF state, at this time the vehicle is in a static sleep state; ② ON is an ignition switch ON gear, at this gear, the vehicle power supply is fully connected, and except that the engine is not started, the vehicle electrical system is basically in a working state, and the ON gear includes two working states of with HV (High Voltage) high voltage and without HV high voltage; ③ START is a start gear, representing that the vehicle engine is started and is in a running state. As shown in the table, various management strategies are switched when switching between the ON gear and the OFF gear, for example, the static current management strategy is used when the OFF gear is used; when entering the ON gear without HV, the load grading management strategy is used, and the power management strategy is used to monitor the state of the equipment and the 48V and 12V storage batteries in real time during the ON gear without HV; the power management strategy is used when entering the HV ON gear or in a running state, and the load grading management strategy is used during the HV ON gear. Figure 3

[0049] In some optional embodiments, the static current management strategy corresponds to the OFF gear of the vehicle, and the BCM (Body Control Module) or VIU (Vehicle Interface Unit) gradually closes unnecessary loads to make the vehicle enter a low-power sleep mode, at this time the SOC (State of Charge) of the 48V storage battery and the 12V storage battery is monitored, and measures such as waking up the vehicle in stages and energy compensation are taken to keep the vehicle small battery in the best state. Moreover, when detecting user proximity (keyless entry) or remote instructions, the related modules are quickly woken up.

[0050] In some optional embodiments, the power management strategy corresponds to the ON gear state of the vehicle, or in the process of running state, the high-voltage system has started to run, and the DCDC starts to work to convert the power of the high-voltage battery into low-voltage power to supply power to the load and the storage battery.

[0051] ​In an alternative embodiment, the load grading control strategy is for the case when the power supply mode is in the ON block state but not on the HV high voltage, at which time part of the low voltage electrical equipment of the vehicle is in operation. When detecting that the battery voltage is too low, the engine is overloaded or overheated, the BCM or the dedicated power management module automatically closes or limits the non-critical load according to the priority (such as automatically reducing the air conditioning power, turning off the seat heating, pausing the background update of the information entertainment system). As shown in FIG. 10, the embodiment of the present application is based on the current vehicle load, and is divided into five categories according to the functional logic characteristics, which are L0 safety critical class load, L1 power related class load, L2 comfort class load, L3 information entertainment class load, and L4 standby class load. At the same time, the priority of different loads in each type is set. Figure 4

[0052] In some alternative embodiments, the L0 safety critical class load includes steering, airbag, brake assist, headlamp, etc., with the highest priority, double-redundant power supply, and power supply is guaranteed in any case; the L1 power related class load includes engine ECU, fuel pump, cooling fan, instrument panel, with medium-high priority, energy supply needs to be guaranteed, and power is dynamically limited based on battery temperature and driving mode; the L2 comfort class load includes seat heating / ventilation, window lifting, door lock, etc., with medium priority, which can be used according to demand and energy limitation; the L3 information entertainment class load includes audio, navigation, display screen, Bluetooth, etc., with low priority, which can be turned off; and the L4 standby class load includes anti-theft system, key induction, remote control module, with extremely low power consumption but needs to be continuously powered. According to the vehicle working condition and energy demand, the embodiment of the present application adopts the load grading management strategy to manage the power supply of the load, and the load priority dynamic scheduling matrix is shown in the following table, which can dynamically adjust the priority of each load according to the running state, SOC and current limitation:

[0053]

[0054] In some alternative embodiments, the present application can ensure that the power supply is selected when the power is insufficient or overloaded, and the basic functions are used, by dynamically adjusting the real-time calculation. In the above table, "-" indicates that the function can be normally used without limitation, "derating" indicates that part of the function can be disabled according to the demand and SOC adjustment, and the power is limited, such as limiting the minimum power of the seat heating and ventilation; and "off" indicates that the function cannot work normally, and the demand power is 0.

[0055] In step S103, based on the current hybrid power distribution management strategy, the power supply mode of the load end is adjusted by the DCDC, 48V battery and 12V battery according to the first state of charge, the second state of charge and the power load, and the load end is dynamically managed based on the preset priority.

[0056] ​Specifically, in the embodiment of the present application, when the current hybrid power distribution management strategy is determined, the state of charge of the 48V battery and the 12V battery during the operation of the vehicle is monitored in real time, and the power load corresponding to the load end is monitored, so as to adjust the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end based on the current hybrid power distribution management strategy, including that the DCDC, the 48V battery and the 12V battery supply power to the load respectively, the DCDC charges the 48V battery and the 12V battery, and the 48V battery and the 12V battery supply power to the load, etc., to ensure stable power supply to the load. During the power supply process, the load is dynamically managed according to the state of charge of the battery, including turning off the load according to the type or turning off the load according to the preset priority, to ensure continuous power supply to the key load.

[0057] The energy distribution method of the hybrid power distribution system provided by the present application determines the current hybrid power distribution management strategy of the hybrid power distribution system as a static current management strategy, a power management strategy or a load grading management strategy according to the vehicle ignition-on state, adjusts the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end based on the current hybrid power distribution management strategy according to the state of charge of the 48V battery and the 12V battery and the power load of the load end, and dynamically manages the load end based on the preset priority. The present application can establish a comprehensive power supply strategy of hierarchical energy distribution management + load grading dynamic adjustment + static current management by constructing a hybrid power distribution architecture, accurately and flexibly adjust the power supply mode according to the actual operation, flexibly control the load, provide stable power supply for the load, reduce the vehicle power consumption by fine adjustment, and realize the optimal utilization of vehicle energy.

[0058] In the embodiment, an energy distribution method of a hybrid power distribution system is provided, which can be used in the energy management system of the vehicle hybrid power distribution system, Figure 5 is a flowchart of the energy distribution method of the hybrid power distribution system according to the embodiment of the present application, as shown in Figure 5 , the flowchart includes the following steps:

[0059] In step S501, the vehicle ignition-on state, the first state of charge of the 48V battery, the second state of charge of the 12V battery and the power load of the load end are obtained. For details, please refer to step S101 of the embodiment shown in Figure 1 , which will not be repeated here.

[0060] In step S502, the current hybrid power distribution management strategy of the hybrid power distribution system is determined according to the vehicle ignition-on state, wherein the current hybrid power distribution management strategy includes a static current management strategy, a power management strategy and a load grading management strategy.

[0061] Specifically, the above step S502 includes:

[0062] In step S5021, if the ignition state of the vehicle is in the fully closed state, it is determined that the current hybrid power distribution management strategy is the static current management strategy.

[0063] Specifically, in the embodiment of the present application, if the ignition state of the vehicle is in the OFF state, it is determined that the current hybrid power distribution management strategy is the static current management strategy. In the low-power sleep mode of the vehicle, the state of charge of the vehicle battery is monitored, and measures such as staged environmental vehicle and energy supplement are taken to make the small battery of the vehicle in the best state, so as to ensure that the user can normally control the vehicle when using it again.

[0064] In step S5022, if the ignition state of the vehicle is in the ignition switch on state but the high-voltage system is not on, it is determined that the current hybrid power distribution management strategy is the load grading management strategy.

[0065] Specifically, in the embodiment of the present application, if the ignition state of the vehicle is in the ON state but the HV high voltage is not on, it is determined that the current hybrid power distribution management strategy is the load grading management strategy. The battery supplies power to the load to meet the basic function, and the state of charge of the battery is monitored. If it is in a low power state, the load is managed in stages.

[0066] In step S5023, if the ignition state of the vehicle is in the ignition switch on state and the high-voltage system is on, or in the running state, it is determined that the current hybrid power distribution management strategy is the power management strategy.

[0067] Specifically, in the embodiment of the present application, if the ignition state of the vehicle is in the ON state, and the high-voltage system starts to run, it is determined that the current hybrid power distribution management strategy is the power management strategy. The state of charge of the battery is monitored during vehicle driving, and the power supply mode of DCDC, 48V battery and 12V battery to the load is switched according to the state of charge.

[0068] In step S503, based on the current hybrid power distribution management strategy, the power supply mode of DCDC, 48V battery and 12V battery to the load end is adjusted according to the first state of charge, the second state of charge and the power load, and the load end is dynamically managed in stages based on the preset priority.

[0069] Specifically, the above step S503 includes:

[0070] In step S5031, it is judged whether there is a power load. If there is, the 48V battery and the 12V battery supply power to the electrical equipment of the load end according to the preset power supply mode, and the DCDC does not supply power to the electrical equipment of the load end.

[0071] Specifically, in the embodiment of the present application, as Figure 6As shown, when the power mode is in the ON block state and the HV high voltage is not on, the load grading management strategy is adopted. Normally, part of the low-voltage electrical equipment of the vehicle is running, so it is judged whether there is power load at this time, that is, it is confirmed whether the low-voltage electrical equipment is working at this time. If the low-voltage electrical equipment is working at this time, the 48V battery and the 12V battery supply power to the electrical equipment at the load end according to the pre-set power supply mode, that is, the 48V battery supplies power to the L0 load and the L1 load, the 12V battery supplies power to the L3 load and the L4 load, and the L2 load is supplied by the 48V battery or the 12V battery according to the state of charge. If there is no low-voltage electrical equipment working, the ON block is maintained, and if there is still no low-voltage electrical equipment working after 5 minutes, the vehicle re-enters the sleep state.

[0072] In step S5032, during power supply, it is detected whether the state of charge is lower than the pre-set state of charge threshold. If the first state of charge is lower than the first state of charge threshold and / or the second state of charge is lower than the second state of charge threshold, the DCDC on request is sent.

[0073] Specifically, in the embodiment of the application, during power supply, the first state of charge of the 48V battery and the second state of charge of the 12V battery are monitored in real time. If the real-time SOC is less than the pre-set SOC threshold, a voice or text alarm prompt is given to request the DCDC to be turned on, and the user determines whether to allow the DCDC to be turned on.

[0074] In step S5033, if the DCDC is not turned on, the electrical equipment at the load end is turned off according to the pre-set priority, and if the DCDC is turned on, the 48V battery and / or the 12V battery is charged by the DCDC.

[0075] Specifically, in the embodiment of the application, as shown in Figure 6 If the user does not agree to turn on the DCDC, the electrical equipment at the load end is turned off according to the load grading turn-off strategy, and the turn-off instruction is sent through the CAN network to send the corresponding disable level and function. After receiving the CAN signal, each controller executes the corresponding closing strategy. As shown in Figure 7The load hierarchical shutdown strategy shown is based on the current working mode, the SOC state of the 48V battery and the SOC state of the 12V battery, and the loads are hierarchically shut down based on a pre-set priority scheduling matrix, that is, the 4-level load, the 3-level load and the 2-level load are shut down or de-rated in this way until all the disableable functions are disabled, so as to more effectively utilize the energy of the power supply. Among them, the cut-off load is mainly set as the comfort type load with large power irrelevant to safety, the comfort type load with large power is limited in levels, and the load with low priority is preferentially disconnected, and the load with priority 1 is not allowed to be downgraded or shut down in any case, and the load with priority 2 or 3 or 4 can be de-rated or shut down for limited use under the condition of low power or SOC.

[0076] In some optional embodiments, the load power supply is divided into 48V battery or 12V battery power supply, and dual redundant power supply is adopted to break the "master-standby" mode and build a bidirectional energy flow + dynamic master-slave switching architecture. Therefore, under normal working conditions, the 48V battery preferentially drives the high-power load (such as headlamp, steering, brake, compressor, etc.), and when the DCDC is not connected, if the 48V battery has sufficient power and the 12V battery has low power, the 12V battery is supplied with power through the efficient low-voltage bidirectional DCDC; when the 48V battery fails or has insufficient power, the 12V battery can be reversely boosted through the low-voltage bidirectional DCDC to supply power to the corresponding key load of the 48V battery, realizing dual redundant power supply.

[0077] In some optional embodiments, as shown in Figure 6 If the user agrees to connect the DCDC, the DCDC connects the high voltage to the low power low voltage battery for power supply, and at the same time, the state of charge of the battery is monitored in real time, and if the state of charge reaches the pre-set charge threshold, the DCDC stops working, the high voltage system is turned off, and the vehicle enters the sleep state.

[0078] The energy distribution method of the hybrid power distribution system provided by the application determines the current hybrid power distribution management strategy of the hybrid power distribution system as a static current management strategy, a power management strategy or a load hierarchical management strategy according to the vehicle ignition-on state, adjusts the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end based on the current hybrid power distribution management strategy according to the state of charge of the 48V battery and the 12V battery and the power load of the load end, and hierarchically dynamically manages the load end based on a pre-set priority. The application can establish a comprehensive power supply strategy of hierarchical energy distribution management + load hierarchical dynamic adjustment + static current management by constructing a hybrid power distribution architecture, accurately and flexibly adjust the power supply mode according to the actual operation condition, flexibly control the load, provide stable power supply for the load, reduce the vehicle power consumption by fine adjustment, and realize the optimal utilization of vehicle energy.

[0079] An energy distribution method of a hybrid power distribution system is provided in the embodiment, which can be used in the energy management system of the hybrid power distribution system of the vehicle, Figure 8 is a flowchart of the energy distribution method of the hybrid power distribution system according to the embodiment of the present application, as shown in the figure, the flow includes the following steps: Figure 8

[0080] In step S801, the on-vehicle power-on ignition state, the first state of charge of the 48V battery, the second state of charge of the 12V battery and the power load of the load end are acquired. For details, please refer to step S501 of the embodiment shown in Figure 5 , which will not be repeated here.

[0081] In step S802, the current hybrid power distribution management strategy of the hybrid power distribution system is determined according to the on-vehicle power-on ignition state, wherein the current hybrid power distribution management strategy includes a static current management strategy, a power management strategy and a load grading management strategy. For details, please refer to step S502 of the embodiment shown in Figure 5 , which will not be repeated here.

[0082] In step S803, based on the current hybrid power distribution management strategy, the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end is adjusted according to the first state of charge, the second state of charge and the power load, and the load end is dynamically managed based on the preset priority.

[0083] Specifically, the above-mentioned step S803 includes:

[0084] In step S8031, if the power load is lower than the first load threshold, the first state of charge is higher than the third state of charge threshold, and the second state of charge is higher than the fourth state of charge threshold, the 48V battery and the 12V battery supply power to the electrical equipment of the load end according to the preset power supply mode, and the DCDC does not supply power to the electrical equipment of the load end.

[0085] Specifically, in the embodiment of the present application, as shown in Figure 9 ​As shown, when the power mode is in the ON block state and the high-voltage system is normally working, a power management strategy is adopted, that is, load management is performed according to the DCDC output efficiency. The power load of the load is monitored in real time, if the power load is low and the SOC of the 48V storage battery and the 12V storage battery is sufficient, the DCDC does not output, and the 48V storage battery and the 12V storage battery supply power to the electrical equipment at the load end according to the pre-set power supply mode. When the high-power full-load power output, the L3 / L4 type load is switched to be powered by the 12V storage battery, so as to guarantee the output capacity of the 48V storage battery; when the load device output is within the normal power threshold range, the 12V storage battery and the 48V storage battery supply power to the load device according to the set power supply mode; when the load device is in a specific working condition, such as low-temperature starting, the 12V storage battery preferentially guarantees the starter, and the L2 / L3 type load can be limited to work, or the power supply mode is switched according to the state of charge of the storage battery to ensure the work of the electrical equipment.

[0086] In step S8032, if the power load is higher than the second load threshold or at least one of the first state of charge is lower than the first charge threshold and the second state of charge is lower than the second charge threshold, the electrical equipment at the load end is supplied with power by the DCDC, and the 48V storage battery and / or the 12V storage battery is charged.

[0087] Specifically, in the embodiment of the application, if the electrical load reaches the set value I or the SOC of the 48V storage battery / 12V storage battery is lower than the pre-set charge threshold, the DCDC works to supply power to the electrical equipment at the load end and charge the low-electricity storage battery.

[0088] In some optional embodiments, the step S8032 includes:

[0089] In step a1, if the first state of charge is lower than the first charge threshold and the second state of charge is higher than the second charge threshold, the electrical equipment at the load end is supplied with power by the DCDC and the 48V storage battery is charged, or the electrical equipment at the load end is supplied with power and / or the 48V storage battery is charged by the 12V storage battery after being reversely boosted.

[0090] In step a2, if the second state of charge is lower than the second charge threshold and the first state of charge is higher than the first charge threshold, the electrical equipment at the load end is supplied with power by the DCDC and the 12V storage battery is charged, or the power supply by the 12V storage battery is switched to the power supply by the 48V storage battery, and the 48V storage battery charges the 12V storage battery.

[0091] In step a3, if the first state of charge is lower than the first charge threshold and the second state of charge is lower than the second charge threshold, the electrical equipment at the load end is supplied with power by the DCDC and the 48V storage battery and the 12V storage battery are charged.

[0092] Specifically, as shown in Figure 9 the SOC of the 12V battery is below the set threshold, the energy management system dynamically adjusts the energy compensation according to the load power, the DCDC supplies power to the load, and at the same time compensates the 12V battery, or switches the load powered by the 12V battery to be powered by the 48V battery, and at the same time the 48V battery charges the 12V battery through the low-voltage DCDC.

[0093] In some optional embodiments, when the SOC of the 12V battery and the 48V battery is below the threshold, the DCDC not only needs to supply power to the load, but also needs to charge the battery, and the 48V battery is preferentially compensated, and after the SOC of the 48V battery reaches the preset threshold, the 12V battery is charged.

[0094] In some optional embodiments, when only the SOC of the 48V battery is below the set threshold, the load powered by the 48V battery can limit the power output according to the load priority, or switch the load with low power level to be powered by the 12V battery, at this time the DCDC supplies power to the load and charges the 48V battery, or charges the 48V battery or supplies power to the load after the 12V battery is reversely boosted, which is determined by the state of charge of the 12V battery.

[0095] Step S8033, if the power load is higher than the third load threshold, the DCDC, the 48V battery and the 12V battery supply power to the electrical equipment at the load end according to the preset power supply mode, and when the first state of charge is lower than the first charge threshold and / or the second state of charge is lower than the second charge threshold, the electrical equipment at the load end is graded off according to the preset priority.

[0096] Specifically, in the embodiments of the present application, if the electrical load is too high, the DCDC outputs full power to supply power to the electrical equipment at the load end, and at the same time the 48V battery and the 12V battery supply power to the electrical equipment at the load end according to the preset power supply mode to ensure the normal operation of the load. At the same time, the state of charge of the 48V battery and the 12V battery is monitored, and if the SOC is below the preset threshold, the electrical equipment at the load end is graded off according to the preset priority.

[0097] In some optional embodiments, as shown in Figure 9As shown, when a DCDC fault occurs, such as overvoltage, undervoltage, or no output, different control measures are implemented based on the DCDC functional safety level. First, when a fault jeopardizes a higher functional safety level, the DCDC output is shut down and a warning is issued to the user. Second, the low-voltage power management system directly disconnects L2 / L3 / L4 loads (not relevant to driving or safety), allowing the battery to ensure the vehicle limps to a safe area until it stops and the engine is turned off.

[0098] The energy distribution method of the hybrid power distribution system provided by the present invention determines the current hybrid power distribution management strategy of the hybrid power distribution system according to the power-on ignition status of the vehicle, wherein the current hybrid power distribution management strategy includes: a static current management strategy, a power management strategy, and a load classification management strategy. Based on the current hybrid power distribution management strategy, the power supply mode of the DCDC, 48V battery, and 12V battery to the load end is adjusted according to the charge state of the 48V battery and the 12V battery and the power load of the load end, and the load end is hierarchically and dynamically managed based on a preset priority. By constructing a hybrid power distribution architecture, the present invention can establish a comprehensive power supply strategy of hierarchical energy distribution management + load classification dynamic adjustment + static current management, accurately and flexibly adjust the power supply mode according to the actual operating conditions, and flexibly control the load to provide stable power supply for the load. It also reduces the power consumption of the entire vehicle through refined adjustment, thereby achieving optimal utilization of the entire vehicle's energy.

[0099] In this embodiment, a method for distributing energy in a hybrid power distribution system is provided, which can be used in the energy management system of the above-mentioned vehicle hybrid power distribution system. Figure 10 FIG. 1 is a flow chart of an energy distribution method for a hybrid power distribution system according to an embodiment of the present invention. Figure 10 As shown, the process includes the following steps:

[0100] Step S1001: Obtain the vehicle's power-on ignition status, the first state of charge of the 48V battery, the second state of charge of the 12V battery, and the power load at the load end. Figure 5 Step S501 of the illustrated embodiment will not be described in detail here.

[0101] Step S1002: Determine the current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state, wherein the current hybrid power distribution management strategy includes: static current management strategy, power management strategy and load classification management strategy. Figure 5 Step S502 of the illustrated embodiment will not be described in detail here.

[0102] At step S1003, based on the current hybrid power distribution management strategy, the power supply mode of the DCDC, the 48V storage battery and the 12V storage battery to the load end is adjusted according to the first state of charge, the second state of charge and the power load, and the load end is dynamically managed based on the preset priority.

[0103] Specifically, the step S1003 includes:

[0104] At step S10031, the first state of charge or the second state of charge is graded, wherein the state of charge corresponding to the first grade, the second grade and the third grade gradually decreases.

[0105] Specifically, in the embodiment of the application, as shown in Figure 11 When the power supply mode is in the OFF gear, the whole vehicle is in a dormant state, and a static current management strategy is adopted, that is, an independent low-power MCU+RTC+CAN is used to wake up and monitor the actual SOC of the vehicle low-voltage storage battery, the first state of charge of the 48V storage battery and the second state of charge of the 12V storage battery are graded according to the set SOC threshold, and then the dormant mode monitoring function is performed.

[0106] At step S10032, if the first state of charge or the second state of charge is in the first grade, the first state of charge or the second state of charge is obtained according to a preset long period, and the first state of charge or the second state of charge is graded.

[0107] Specifically, in the embodiment of the application, when the first state of charge of the 48V storage battery or the second state of charge of the 12V storage battery is in the first grade, the current low-voltage battery SOC value is automatically woken up periodically (for example, every five days) for detection, and the SOC value and system safety are judged after self-checking.

[0108] At step S10033, if the first state of charge or the second state of charge is in the second grade, the first state of charge or the second state of charge is obtained according to a preset short period, and the first state of charge or the second state of charge is graded.

[0109] Specifically, in the embodiment of the application, when the first state of charge of the 48V storage battery or the second state of charge of the 12V storage battery is in the second grade, the current low-voltage battery SOC value is automatically woken up periodically (switched to every day) for detection, and the SOC value and system safety are judged after self-checking.

[0110] At step S10034, if the first state of charge or the second state of charge is in the third grade, it is judged whether the high-voltage battery state satisfies the charging condition, if yes, the DCDC is controlled to charge the 48V storage battery and / or the 12V storage battery, otherwise an alarm is generated.

[0111] Specifically, in the embodiment of the present application, as shown in Figure 11 When the first state of charge of the 48V battery and the second state of charge of the 12V battery are in the third level, the whole vehicle network is woken up, and whether the DCDC is allowed to charge the low-voltage battery is judged according to the current high-voltage battery power condition and other load safety conditions. When the charging condition of the DCDC is met, the user is prompted with an alarm information that the low-voltage power system power is low, and a request is sent to the DCDC to connect the high-voltage system to charge the low-voltage battery. The DCDC is connected to charge the battery, or the low-voltage battery is charged through the solar management board. In the embodiment of the present application, when the whole vehicle is in the long-term parking OFF state, the low-voltage battery can be supplemented by solar energy, avoiding the problem of small battery feeding of the vehicle during long-term parking, and maintaining the battery state.

[0112] In some optional embodiments, when the DCDC connection condition is not met, only the user is sent an alarm prompt information that the low-voltage power system power is low. The user is requested to feed back whether the DCDC is connected, and if the user agrees, the DCDC is connected to charge the low-voltage system. When the SOC reaches the designed charging threshold, the DCDC stops working, the high-voltage system is disconnected, and the whole vehicle enters the hibernation state.

[0113] The energy distribution method of the hybrid power distribution system provided by the present application determines the current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle ignition-on state, wherein the current hybrid power distribution management strategy includes a static current management strategy, a power management strategy and a load grading management strategy. Based on the current hybrid power distribution management strategy, the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end is adjusted according to the state of charge of the 48V battery and the 12V battery and the power load of the load end, and the load end is dynamically managed based on a preset priority. The present application can establish a comprehensive power supply strategy of hierarchical energy distribution management + load grading dynamic adjustment + static current management by constructing a hybrid power distribution architecture, accurately and flexibly adjust the power supply mode according to the actual operation condition, flexibly control the load, provide stable power supply for the load, and reduce the whole vehicle power consumption by fine adjustment, so as to realize the optimal utilization of the whole vehicle energy.

[0114] In the embodiment, an energy distribution device of a hybrid power distribution system is also provided, which is used to realize the above-mentioned embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that realizes a predetermined function. Although the device described in the following embodiments is preferably realized in software, hardware, or a combination of software and hardware is also possible and conceived.

[0115] The present embodiment provides an energy distribution device of a hybrid power distribution system, as shown in Figure 12 The device comprises:

[0116] The information acquisition module 1201 is configured to acquire the vehicle power-on ignition state, the first state of charge of the 48V battery, the second state of charge of the 12V battery, and the power load of the load end.

[0117] The strategy determination module 1202 is configured to determine a current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state, wherein the current hybrid power distribution management strategy includes a static current management strategy, a power management strategy, and a load grading management strategy.

[0118] The energy distribution module 1203 is configured to adjust the power supply mode of the DCDC, the 48V battery, and the 12V battery to the load end according to the first state of charge, the second state of charge, and the power load based on the current hybrid power distribution management strategy, and to perform a graded dynamic management on the load end based on a preset priority.

[0119] In some optional embodiments, the strategy determination module 1202 includes:

[0120] The first strategy determination unit is configured to determine the current hybrid power distribution management strategy as the static current management strategy if the vehicle power-on ignition state is in the completely closed gear.

[0121] The second strategy determination unit is configured to determine the current hybrid power distribution management strategy as the load grading management strategy if the vehicle power-on ignition state is in the ignition switch-on gear but the high-voltage system is not turned on.

[0122] The third strategy determination unit is configured to determine the current hybrid power distribution management strategy as the power management strategy if the vehicle power-on ignition state is in the ignition switch-on gear and the high-voltage system is turned on, or in the running state.

[0123] In some optional embodiments, the energy distribution module 1203 includes a load grading management unit, a power management unit, and a static current management unit, wherein the load grading management unit includes:

[0124] The load monitoring sub-unit is configured to determine whether there is a power load, and if there is, the 48V battery and the 12V battery supply power to the electrical equipment of the load end according to a preset power supply mode, and the DCDC does not supply power to the electrical equipment of the load end.

[0125] The state of charge monitoring sub-unit is configured to detect whether the state of charge is lower than a preset state of charge threshold during the power supply process, and if the first state of charge is lower than a first state of charge threshold and / or the second state of charge is lower than a second state of charge threshold, an on request of the DCDC is sent out.

[0126] a hierarchical shutdown subunit, configured to, if the DCDC output is still not turned on, perform hierarchical shutdown on the electrical equipment at the load end according to a preset priority, and if the DCDC is turned on, perform charging on the 48V storage battery and / or the 12V storage battery by the DCDC.

[0127] a reverse power supply subunit, configured to, if the first state of charge is lower than the first state of charge threshold and the second state of charge is higher than the fourth state of charge threshold, perform power supply switching from the 48V storage battery to the 12V storage battery.

[0128] a reverse function subunit, configured to, if the second state of charge is lower than the second state of charge threshold and the first state of charge is higher than the third state of charge threshold, perform reverse charging on the 12V storage battery by the 48V storage battery.

[0129] In some optional embodiments, the power management unit comprises:

[0130] a first power management subunit, configured to, if the power load is lower than the first load threshold, the first state of charge is higher than the third state of charge threshold, and the second state of charge is higher than the fourth state of charge threshold, perform power supply on the electrical equipment at the load end by the 48V storage battery and the 12V storage battery in a preset power supply mode, and the DCDC does not perform power supply on the electrical equipment at the load end;

[0131] a second power management subunit, configured to, if at least one of the following conditions is met, perform power supply on the electrical equipment at the load end by the DCDC and perform charging on the 48V storage battery and / or the 12V storage battery: the power load is higher than the second load threshold, or the first state of charge is lower than the first state of charge threshold and the second state of charge is lower than the second state of charge threshold.

[0132] a third power management subunit, configured to, if the power load is higher than the third load threshold, perform power supply on the electrical equipment at the load end by the DCDC, the 48V storage battery and the 12V storage battery in a preset power supply mode, and perform hierarchical shutdown on the electrical equipment at the load end according to a preset priority when the first state of charge is lower than the first state of charge threshold and / or the second state of charge is lower than the second state of charge threshold.

[0133] In some optional embodiments, the second power management subunit further comprises: if the first state of charge is lower than the first state of charge threshold and the second state of charge is higher than the second state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 48V battery; if the second state of charge is lower than the second state of charge threshold and the first state of charge is higher than the first state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 12V battery or switches the power supply from the 12V battery to the 48V battery and charges the 12V battery by the 48V battery; if the first state of charge is lower than the first state of charge threshold and the second state of charge is lower than the second state of charge threshold, the DCDC supplies power to the load end electrical equipment and charges the 48V battery and the 12V battery.

[0134] In some optional embodiments, the static current management unit comprises:

[0135] a level judgment subunit configured to judge the first state of charge or the second state of charge, wherein the first level, the second level and the third level correspond to gradually decreasing states of charge.

[0136] a first wake-up subunit configured to, if the first state of charge or the second state of charge is at the first level, acquire the first state of charge or the second state of charge according to a preset long period and judge the first state of charge or the second state of charge.

[0137] a second wake-up subunit configured to, if the first state of charge or the second state of charge is at the second level, acquire the first state of charge or the second state of charge according to a preset short period and judge the first state of charge or the second state of charge;

[0138] a third wake-up subunit configured to, if the first state of charge or the second state of charge is at the third level, judge whether the high-voltage battery state satisfies a charging condition, if yes, control the DCDC to charge the 48V battery and / or the 12V battery, and if not, generate an alarm prompt.

[0139] Further function descriptions of the above-mentioned modules and units are the same as those of the above-mentioned embodiments, which will not be repeated here.

[0140] The energy distribution device of the hybrid power distribution system in the embodiment is in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and a memory executing one or more software or fixed programs, and / or other devices that can provide the above-mentioned functions.

[0141] The embodiment of the present application further provides a computer device having the above-mentionedFigure 12 Energy distribution device of the hybrid power distribution system.

[0142] Referring to Figure 13 , Figure 13 is a structural schematic diagram of a computer device provided by an optional embodiment of the present application. As shown in Figure 13 , the computer device includes one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are communicatively connected by different buses, and can be installed on a common mainboard or in other manners as needed. The processor can process instructions executed within the computer device, including instructions stored in the memory or graphics information of a GUI stored in the memory for displaying on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory, if needed. Similarly, multiple computer devices can be connected, each providing part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 13 The processor 10 is taken as an example in the embodiment.

[0143] The processor 10 can be a central processor, a network processor, or a combination thereof. The processor 10 can further include a hardware chip. The hardware chip can be an application specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device can be a complex programmable logic device, a field programmable logic gate array, a generic array logic, or any combination thereof.

[0144] The memory 20 stores instructions executable by the at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0145] The memory 20 can include a program storage area and a data storage area. The program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the computer device, etc. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some optional embodiments, the memory 20 can optionally include a memory remotely arranged with respect to the processor 10, and these remote memories can be connected to the computer device through a network. Examples of the network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0146] The memory 20 can include a volatile memory, for example, a random access memory; the memory can also include a non-volatile memory, for example, a flash memory, a hard disk or a solid state disk; the memory 20 can also include a combination of the above-mentioned kinds of memories.

[0147] The computer device further comprises a communication interface 30 for communication of the computer device with other devices or communication networks.

[0148] The embodiment of the present application also provides a hybrid power distribution system, as shown in the accompanying drawings, comprising: Figure 2

[0149] The driver seat cabin system is used for obtaining the control demand of the user;

[0150] The energy management system is used for executing the energy distribution method of the hybrid power distribution system as shown in the accompanying drawings based on the control demand. Figure 1 、 Figure 5 or Figure 8

[0151] The control execution system is pre-built as a hybrid power distribution architecture, and the hybrid power distribution architecture comprises a power supply end and a load end. The power supply end is a layered energy distribution architecture, comprising a DCDC, a 48V storage battery and a 12V storage battery. The load end is divided according to a preset priority. The power supply end supplies power to the load end based on the control of the energy management system.

[0152] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.​​

Claims

1. An energy distribution method for a hybrid power distribution system, characterized in that: The hybrid power distribution system includes a power supply end and a load end, wherein the power supply end includes: a DC-DC, a 48V battery, and a 12V battery, and the load end is divided according to a preset priority. The method includes: Obtaining the vehicle power-on ignition state, the first state of charge of the 48V battery, the second state of charge of the 12V battery, and the power load of the load end; Determining a current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state, wherein the current hybrid power distribution management strategy includes: a static current management strategy, a power management strategy, and a load classification management strategy; Based on the current hybrid power distribution management strategy, the power supply mode of the DCDC, the 48V battery and the 12V battery to the load end is adjusted according to the first state of charge, the second state of charge and the power load, and the load end is hierarchically and dynamically managed based on the preset priority.

2. The method according to claim 1, characterized in that The determining of the current hybrid power distribution management strategy of the hybrid power distribution system according to the vehicle power-on ignition state includes: If the vehicle is powered on and the ignition state is in the fully closed position, determining that the current hybrid power distribution management strategy is the static current management strategy; If the vehicle is powered on and the ignition state is in the ignition switch-on position but the high-voltage system is not connected, determining that the current hybrid power distribution management strategy is the load classification management strategy; If the vehicle is powered on and the ignition state is in the ignition switch on position and the high voltage system is connected, or is in a running state, the current hybrid power distribution management strategy is determined to be the power management strategy.

3. The method according to claim 1, characterized in that If the current hybrid power distribution management strategy is the load hierarchical management strategy, then based on the current hybrid power distribution management strategy, adjusting the power supply mode of the DCDC, the 48V battery, and the 12V battery to the load end according to the first state of charge, the second state of charge, and the power load, and performing hierarchical dynamic management of the load end based on the preset priority, including: Determine whether the power load exists. If so, the 48V battery and the 12V battery supply power to the electrical equipment at the load end according to a preset power supply mode, and the DCDC does not supply power to the electrical equipment at the load end. During the power supply process, detecting whether the state of charge is lower than a preset charge threshold, and if the first state of charge is lower than a first charge threshold, and / or the second state of charge is lower than a second charge threshold, issuing a connection request for the DCDC; If the DCDC is still not connected, the electrical equipment at the load end is shut down in stages according to the preset priority. If the DCDC is connected, the DCDC charges the 48V battery and / or the 12V battery.

4. The method according to claim 3, characterized in that After the DCDC is still not turned on, the method further includes: If the second state of charge is lower than the second charge threshold and the first state of charge is higher than a third charge threshold, the 12V battery is reversely charged by the 48V battery; If the first state of charge is lower than the first charge threshold and the second state of charge is higher than a fourth charge threshold, power supply from the 48V battery is switched to power supply from the 12V battery.

5. The method according to claim 1, wherein If the current hybrid power distribution management strategy is the power supply management strategy, then based on the current hybrid power distribution management strategy, adjusting the power supply mode of the DCDC, the 48V battery, and the 12V battery to the load end according to the first state of charge, the second state of charge, and the power load, and performing hierarchical dynamic management of the load end based on the preset priority, including: If the power load is lower than a first load threshold, the first state of charge is higher than a third charge threshold, and the second state of charge is higher than a fourth charge threshold, the 48V battery and the 12V battery supply power to the electrical equipment at the load end according to a preset power supply mode, and the DCDC does not supply power to the electrical equipment at the load end; If the power load is higher than a second load threshold, or at least one of the first state of charge is lower than a first charge threshold and the second state of charge is lower than a second charge threshold is satisfied, the DCDC supplies power to the electrical device at the load end and charges the 48V battery and / or the 12V battery; If the power load is higher than the third load threshold, the DCDC, the 48V battery and the 12V battery will supply power to the electrical equipment at the load end according to the preset power supply method, and when the first state of charge is lower than the first charge threshold and / or the second state of charge is lower than the second charge threshold, the electrical equipment at the load end will be shut down in a graded manner according to the preset priority.

6. The method according to claim 5, characterized in that If the power load is higher than a second load threshold, or at least one of the first state of charge is lower than a first charge threshold and the second state of charge is lower than a second charge threshold is satisfied, the DCDC supplies power to the electrical device at the load end and charges the 48V battery and / or the 12V battery, including: If the first state of charge is lower than the first charge threshold and the second state of charge is higher than the second charge threshold, the DCDC is used to supply power to the electrical equipment at the load end and to charge the 48V battery, or the 12V battery is reverse-boosted to supply power to the electrical equipment at the load end and / or to charge the 48V battery; If the second state of charge is lower than the second charge threshold and the first state of charge is higher than the first charge threshold, the DC-DC converter supplies power to the electrical equipment at the load end and charges the 12V battery, or switches power supply from the 12V battery to the 48V battery, and charges the 12V battery with the 48V battery; If the first state of charge is lower than the first charge threshold and the second state of charge is lower than the second charge threshold, the DCDC supplies power to the electrical equipment at the load end and charges the 48V battery and the 12V battery.

7. The method according to claim 1, characterized in that If the current hybrid power distribution management strategy is the static current management strategy, then based on the current hybrid power distribution management strategy, adjusting the power supply mode of the DCDC, the 48V battery, and the 12V battery to the load end according to the first state of charge, the second state of charge, and the power load, and performing hierarchical dynamic management of the load end based on the preset priority, further comprising: performing a level determination on the first state of charge or the second state of charge, wherein the states of charge corresponding to the first level, the second level, and the third level gradually decrease; If the first state of charge or the second state of charge is at a first level, acquiring the first state of charge or the second state of charge according to a preset long period, and performing a level determination on the first state of charge or the second state of charge; If the first state of charge or the second state of charge is at the second level, acquiring the first state of charge or the second state of charge according to a preset short period, and performing a level determination on the first state of charge or the second state of charge; If the first state of charge or the second state of charge is at the third level, it is determined whether the high-voltage battery state meets the charging conditions. If so, the DCDC is controlled to charge the 48V battery and / or the 12V battery. Otherwise, an alarm is generated.

8. An energy distribution device for a hybrid power distribution system, characterized in that: The hybrid power distribution system includes a power supply end and a load end. The power supply end includes: DCDC, 48V battery and 12V battery. The load end is divided according to preset priorities. The device includes: An information acquisition module is used to obtain the vehicle power-on ignition state, the first state of charge of the 48V battery, the second state of charge of the 12V battery, and the power load of the load end; a strategy determination module, configured to determine a current hybrid power distribution management strategy of the hybrid power distribution system according to the power-on ignition state of the vehicle, wherein the current hybrid power distribution management strategy includes: a quiescent current management strategy, a power management strategy, and a load classification management strategy; an energy distribution module, configured to adjust the power supply mode of the DCDC, the 48V battery, and the 12V battery to the load end according to the first state of charge, the second state of charge, and the power load based on the current hybrid power distribution management strategy, and to perform hierarchical dynamic management of the load end based on the preset priority.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the energy distribution method of the hybrid power distribution system according to any one of claims 1 to 7 by executing the computer instructions.

10. A hybrid power distribution system, characterized in that: include: Cockpit system, used to obtain the user's control needs; An energy management system, configured to execute the energy distribution method of the hybrid power distribution system according to any one of claims 1 to 7 based on the control demand; The control execution system is pre-built as a hybrid power distribution architecture, which includes: a power supply end and a load end. The power supply end is a layered energy distribution architecture, including: DCDC, 48V battery and 12V battery. The load end is divided according to preset priorities, and the power supply end supplies power to the load end based on the control of the energy management system.

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