Power management device, vehicle, power management method, and storage medium

Abstract

The invention provides a power management device, a vehicle, a method and a storage medium, the power management device is applied to the vehicle, the vehicle comprises a power battery, a first low-voltage load and a second low-voltage load, and the working voltage of the first low-voltage load is different from that of the second low-voltage load; the vehicle is provided with a plurality of areas, the device comprises a plurality of power management modules and a low-voltage power supply, and each power management module corresponds to one area; the input end of each power supply management module is connected with the power battery and is also connected with the low-voltage power supply, and the output end of each power supply management module is connected with the first low-voltage load and the second low-voltage load in the corresponding area. Working voltage can be provided for the first low-voltage load and the second low-voltage load in the corresponding area based on the power battery or the power supply, meanwhile, each power management module can supply power to the low-voltage load in the corresponding area nearby, and the setting cost of the power supply wire harness can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric vehicles, and in particular to a power management device, a vehicle, a power management method, and a computer-readable storage medium. Background Art

[0002] As cars are becoming more electrified, intelligent, and connected, electric vehicles are gradually emerging in the automotive industry. Electric vehicles are usually powered by power batteries installed inside the vehicle to supply power to the loads inside the vehicle (such as electronic control units). Different types of loads in electric vehicles may have different operating voltages, and these loads have related power consumption regardless of whether the power battery is in working or stopped state. Therefore, it is necessary to ensure that these loads work normally when the power battery is in different working states. Summary of the invention

[0003] The embodiments of the present disclosure at least provide a power management device, a vehicle and a power management method, which can provide power to low-voltage loads in a corresponding area based on a power management module, thereby helping to reduce the cost of setting up the power supply harness.

[0004] The present disclosure provides a power management device for use in a vehicle.

[0005] The vehicle includes a power battery, a first low-voltage load and a second low-voltage load, wherein the first low-voltage load and the second low-voltage load have different operating voltages; the vehicle is provided with a plurality of areas, the device includes a plurality of power management modules and a low-voltage power supply, and each power management module corresponds to one area;

[0006] For each power management module, the input end of the power management module is connected to the power battery, and the output end of the power management module is connected to the first low-voltage load and the second low-voltage load in the corresponding area, so as to provide corresponding working voltages to the first low-voltage load and the second low-voltage load in the corresponding area based on the power battery;

[0007] The input end of the power management module is also connected to the low-voltage power supply, and is used to provide corresponding working voltages for the first low-voltage load and the second low-voltage load in the corresponding area based on the low-voltage power supply.

[0008] In the disclosed embodiment, since the vehicle itself is provided with a power battery, and the power battery is connected to the input end of each power management module, power can be supplied to the first low-voltage load and the second low-voltage load based on the power battery; in addition, since a low-voltage power supply is provided in the power management module, power can also be supplied to the first low-voltage load and the second low-voltage load through the low-voltage power supply. In this way, power supply to low-voltage loads with different working voltages can be achieved in different ways, and since each power management module corresponds to an area of ​​the vehicle, each power management module can supply power to the low-voltage loads in the corresponding area nearby, which is beneficial to reduce the cost of setting up the wiring harness.

[0009] In a possible implementation manner, the device further includes a voltage conversion module; an input end of the voltage conversion module is connected to the power battery, and an output end of the voltage conversion module is connected to the multiple power management modules respectively;

[0010] The voltage conversion module is used to convert the high voltage output by the power battery into a first low voltage, and output the first low voltage to the multiple power management modules respectively.

[0011] In the embodiment of the present disclosure, the voltage conversion module converts the high voltage output by the power battery into a first low voltage, and outputs the first low voltage to multiple power management modules. In this way, it is possible to avoid directly outputting the high voltage to the power management module. In this way, the circuit can be protected and the service life of the device can be extended.

[0012] In a possible implementation manner, the low-voltage power supply is used to output a second low voltage, and the second low voltage is 48V;

[0013] The first low voltage output by the voltage conversion module is 12V.

[0014] In the embodiment of the present disclosure, the second low voltage output by the low-voltage power supply is 48V, and the first low voltage output by the voltage conversion module is 12V. In this way, the first low voltage load and the second low voltage load can be powered respectively based on the first low voltage and the second low voltage.

[0015] In a possible implementation, the power management module is specifically configured to provide a corresponding operating voltage to a first low-voltage load and a second low-voltage load in the corresponding area based on the low-voltage power supply when the power battery stops working.

[0016] In the disclosed embodiment, if the power battery stops working, the vehicle still needs to provide static current to power the load, and at this time it can be powered by a low-voltage power supply. In this way, the functions of various systems in the vehicle or the normal working state of the internal circuits of the vehicle can be ensured.

[0017] In a possible implementation, each power management module includes a bidirectional voltage conversion unit;

[0018] The bidirectional voltage conversion unit is connected to the voltage conversion module, and is used to convert the first low voltage output by the voltage conversion module into the second working voltage to supply power to the second low voltage load in the area corresponding to the power management module;

[0019] The bidirectional voltage conversion unit is also connected to the low-voltage power supply, and is used to convert the second low voltage output by the low-voltage power supply into the first operating voltage to power the first low-voltage load in the area corresponding to the power management module.

[0020] In the embodiment of the present disclosure, the bidirectional voltage conversion unit can convert the first voltage output by the voltage conversion module into a second working voltage to supply power to the second low-voltage load in the area corresponding to the power management module; the bidirectional voltage conversion unit can also convert the second voltage output by the power supply into a first working voltage to provide working voltage to the first low-voltage load in the area corresponding to the power management module, so that the output voltage can be adapted to the working voltage of loads with different working voltages.

[0021] In a possible implementation, the bidirectional voltage conversion unit includes a transformer, which includes a first coil and a second coil; the first connection end of the bidirectional voltage conversion unit corresponds to the connection end of the first coil of the transformer, and the second connection end of the bidirectional voltage conversion unit corresponds to the connection end of the second coil of the transformer.

[0022] In the disclosed embodiment, the bidirectional voltage conversion unit includes a transformer, which includes a first coil and a second coil. In addition to performing voltage conversion to generate an operating voltage that matches different types of loads, the voltages connected to the two ends of the bidirectional voltage conversion unit can also be isolated, which is beneficial for protecting the circuit.

[0023] In a possible implementation, the bidirectional voltage conversion unit is also used to convert the first voltage into a charging voltage to charge the low-voltage power supply when the power level of the low-voltage power supply is lower than a preset power level, wherein the charging voltage is the same as the second voltage.

[0024] In the embodiment of the present disclosure, when the power level of the low-voltage power supply is lower than a preset power level, the bidirectional voltage conversion module converts the first voltage into a charging voltage to charge the low-voltage power supply. In this way, the low-voltage power supply can be avoided from feeding power, thereby ensuring that when the power battery is in a stopped state, the low-voltage power supply can supply power to the first low-voltage load and the second low-voltage load.

[0025] The embodiment of the present disclosure provides a vehicle, a vehicle characterized by comprising a power battery, a first low-voltage load, a second low-voltage load, and the power management device described in any of the above embodiments;

[0026] The power battery is connected to the power management device, and the power management device is used to supply power to the first low-voltage load and the second low-voltage load respectively based on the voltage provided by the power battery.

[0027] An embodiment of the present disclosure provides a power management method, which is applied to a vehicle, wherein the vehicle includes a power battery, a first low-voltage load, and a second low-voltage load, wherein the first low-voltage load and the second low-voltage load have different operating voltages; the method includes:

[0028] When it is detected that the power battery is in a working state, converting the high voltage output by the power battery into a first working voltage and a second working voltage, and supplying power to the first low-voltage load and the second low-voltage load based on the first working voltage and the second working voltage;

[0029] When it is detected that the power battery is in a stopped working state, the second voltage output by the low-voltage power supply is converted into the first working voltage and the second working voltage, and the first low-voltage load and the second low-voltage load are powered based on the first working voltage and the second working voltage.

[0030] In one possible implementation, the method further includes:

[0031] Obtaining the power of the low-voltage power supply;

[0032] When the power level of the low-voltage power supply is lower than a preset power level, the high voltage output by the power battery is converted into a charging voltage to charge the low-voltage power supply, and the charging voltage is the same as the second voltage.

[0033] An embodiment of the present disclosure provides an electronic device, characterized in that it includes: a processor, a memory and a bus, the memory stores machine-readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the power management method as described in any one of the above are performed.

[0034] An embodiment of the present disclosure provides a computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the power management method described in any possible implementation manner described above are executed.

[0035] An embodiment of the present disclosure provides a computer program product, including a computer program, characterized in that when the computer program is executed, the steps of the power management method described in any possible implementation manner described above are implemented.

[0036] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used together with the specification to illustrate the technical solutions of the present disclosure. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0038] Figure 1 A principle block diagram of a vehicle provided by an embodiment of the present disclosure is shown;

[0039] Figure 2 A principle block diagram of a power management device provided by an embodiment of the present disclosure is shown;

[0040] Figure 3 A distribution diagram of a power management module provided by an embodiment of the present disclosure is shown;

[0041] Figure 4 A principle block diagram of another power management device provided by an embodiment of the present disclosure is shown;

[0042] Figure 5 A principle block diagram of a power management module provided by an embodiment of the present disclosure is shown;

[0043] Figure 6 A circuit diagram of a bidirectional voltage conversion unit provided by an embodiment of the present disclosure is shown;

[0044] Figure 7 A flow chart of a power management method provided by an embodiment of the present disclosure is shown;

[0045] Figure 8 A schematic structural diagram of an electronic device provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0049] Research has found that electric vehicles are usually powered by power batteries installed inside the vehicle for internal loads (such as electronic control units), and the operating voltages of different types of loads in electric vehicles may be different, and these loads have related power consumption regardless of whether the power battery is in working state or stopped state. Therefore, it is necessary to ensure that these loads work normally when the power battery is in different working states.

[0050] Based on the above research, an embodiment of the present disclosure provides a power management device, which is applied to a vehicle, wherein the vehicle includes a power battery, a first low-voltage load and a second low-voltage load, and the working voltages of the first low-voltage load and the second low-voltage load are different; the vehicle is provided with multiple areas, and the device includes multiple power management modules and a low-voltage power supply, each power management module corresponds to one area; for each power management module, the input end of the power management module is connected to the power battery, and the output end of the power management module is connected to the first low-voltage load and the second low-voltage load in the corresponding area, and is used to provide the first low-voltage load and the second low-voltage load in the corresponding area with the corresponding working voltage based on the power battery; the input end of the power management module is also connected to the low-voltage power supply, and is used to provide the first low-voltage load and the second low-voltage load in the corresponding area with the corresponding working voltage based on the low-voltage power supply, so that the first low-voltage load and the second low-voltage load can be powered based on the power battery; in addition, since the low-voltage power supply is provided in the power management module, the first low-voltage load and the second low-voltage load can also be powered by the low-voltage power supply, so that the power supply of low-voltage loads with different working voltages can be realized in different ways.

[0051] In addition, since each power management module corresponds to an area of ​​the vehicle, each power management module can supply power to low-voltage loads in the corresponding area, which is beneficial to reducing the cost of wiring harness installation.

[0052] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0053] See also Figure 1 , Figure 1 FIG. 1 is a schematic block diagram of a vehicle provided in an embodiment of the present disclosure. Figure 1 As shown, the vehicle 100 includes a first low-voltage load 101 and a second low-voltage load 102 , a power battery 103 and a power management device 104 .

[0054] Among them, the operating voltages of the first low-voltage load 101 and the second low-voltage load 102 are different. In this embodiment, the first low-voltage load and the second low-voltage load are both low-voltage loads, which can be electronic control units (Electrical Control Unit, ECU), which is also called an on-board computer, consisting of a microcontroller and peripheral circuits.

[0055] Here, the operating voltage of the first low-voltage load may be 12 V, and the operating voltage of the second low-voltage load may be 48 V. In other embodiments, the operating voltage of the first low-voltage load may be 48 V, and the operating voltage of the second low-voltage load may be 12 V. In some other embodiments, the operating voltage of the first low-voltage load and the operating voltage of the second low-voltage load may also be other voltage values, which are not limited here.

[0056] The vehicle 100 may also include a third type of load (not shown), which may also be a low-voltage load, and whose operating voltage is also different from that of the first low-voltage load and the second low-voltage load, for example, 24V, etc., which is not limited here. In other embodiments, the first low-voltage load 101 and the second low-voltage load 102 may also be loads such as air conditioners, which are not limited here.

[0057] The power battery 103 includes but is not limited to a lead-acid battery, a lithium iron phosphate battery, a nickel-metal hydride battery, a nickel-cadmium battery, etc. In some embodiments, the power battery 105 may also include a supercapacitor. In this embodiment, the power battery 103 may be a battery that outputs a 400V or 800V DC voltage. In other embodiments, the power battery 103 may also be a battery that outputs other DC voltages, which is not limited here.

[0058] It is understandable that the power battery 103 can be electrically connected to the motor controller (not shown) to store and provide electrical energy, and the power battery can be managed by a battery management system (not shown). Specifically, the battery management system is used to monitor and estimate the state of the power battery 103 under different working conditions to improve the utilization rate of the power battery 103, prevent the power battery 103 from being overcharged and over-discharged, and thus extend the service life of the power battery 103.

[0059] The input end of the power management device 104 is connected to the power battery 103, and the output end of the power management device 104 is connected to the first low-voltage load 101 and the second low-voltage load 102 respectively, so as to provide corresponding working voltages for the first low-voltage load 101 and the second low-voltage load 102 respectively based on the power battery 103.

[0060] See also Figure 2 , Figure 2 FIG. 1 is a block diagram of a power management device provided in an embodiment of the present disclosure. Figure 2 As shown, the power management device 104 includes a plurality of power management modules 1041 and a low-voltage power supply 1042 .

[0061] Among them, the vehicle is provided with multiple areas, and the multiple areas can be divided arbitrarily according to actual needs. For example, the vehicle can be divided into three areas: front (front of the vehicle), middle (body), and rear (tail of the vehicle). It can also be divided into other numbers of areas, which are not limited here.

[0062] Here, each power management module 1041 corresponds to an area of ​​the vehicle, and is used to provide working voltage for the first low-voltage load 101 and the second low-voltage load 102 in the corresponding area.

[0063] The multiple power management modules 1041 may be distributed in different physical locations of the vehicle 100. For example, see Figure 3 , is a schematic diagram of the distribution of a power management module provided by an embodiment of the present disclosure. Figure 3 As shown in , the power management module 1041 can be respectively set in four directions such as front, back, left and right inside the vehicle 100, and each dotted box corresponds to the area of ​​the power management module, wherein the area corresponding to the power management module 1041 set in front of the vehicle 100 can refer to the area in front of the vehicle, and provide working voltage for the first low-voltage load 101 and the second low-voltage load 102 in the area in front of the vehicle 100. Similarly, the area corresponding to the power management module 1041 set on the left side of the vehicle 100 body can refer to the area on the left side of the vehicle body, and provide working voltage for the first low-voltage load 101 and the second low-voltage load 102 in the area on the left side of the vehicle 100. They are not listed one by one here. In some embodiments, other numbers of areas can also be divided inside the vehicle 100, such as six areas of left front, right front, left middle, right middle, left rear, and right rear, and each area corresponds to a power management module 1041.

[0064] The low-voltage power supply 1042 may be a battery, wherein the battery includes but is not limited to a lead-acid battery, a lithium iron phosphate battery, a nickel-hydrogen battery, a nickel-cadmium battery, etc. In some embodiments, the low-voltage power supply 1042 may also include a supercapacitor.

[0065] It should be noted that the specification of the low-voltage power supply 1042 can be selected according to actual needs, that is, the output voltage of the low-voltage power supply 1042 can be adjusted accordingly according to the design of the circuit, which is not limited here. It should be understood that when the power battery 103 of the electric vehicle stops working, static power consumption is still required to maintain the function of the vehicle system or the normal working state of the internal circuit of the vehicle. Static power consumption refers to the static power consumption generated by the static current consumption inside the load when the power battery stops working. For example, the vehicle's safety system, remote control system, etc., when the power battery stops supplying power, these systems still need a certain degree of power to maintain their normal working state. For example, the computer system, control unit and other circuits of the vehicle need to remain powered on to maintain the stored data, maintain the clock, etc. Therefore, in this embodiment, by setting the low-voltage power supply 1042 in the power management device, when the power battery 103 is in a stopped working state, the low-voltage power supply 1042 can supply power for the static power consumption of the entire vehicle 100.

[0066] For details, please refer to Figure 2 For each power management module 1041, the input end of the power management module 1041 is connected to the power battery 103, and the output end of the power management module 1041 is connected to the first low-voltage load 101 and the second low-voltage load 102 in the corresponding area, so as to provide the first low-voltage load 101 and the second low-voltage load 102 in the corresponding area with the corresponding working voltage based on the power battery 103.

[0067] The input end of the power management module 1041 is also connected to the low-voltage power supply 1042 for providing corresponding working voltages for the first low-voltage load 101 and the second low-voltage load 102 in the corresponding area based on the low-voltage power supply 1042 .

[0068] See also Figure 4 , Figure 4 This is a functional block diagram of another power management device provided by an embodiment of the present disclosure. Figure 4 As shown in , the power management device 104 further includes a voltage conversion module 1043 .

[0069] Among them, the input end of the voltage conversion module 1043 is connected to the power battery 103, and the output end of the voltage conversion module 1043 is respectively connected to each power management module 1041. When the power battery 103 is in a working state, the voltage conversion module 1043 receives the high voltage output by the power battery 103, and converts the high voltage output by the power battery 103 into a first voltage, and outputs the first voltage to the multiple power management modules 1041 respectively.

[0070] It can be understood that in the above-mentioned embodiment, since the operating voltages of the first low-voltage load 101 and the second low-voltage load 102 are relatively low, for example, they can be 12V and 48V, therefore, after the voltage conversion module 1043 receives the high voltage output by the power battery 103, it is necessary to step down the voltage to obtain the first voltage, that is, the first voltage is lower than the high voltage, so that various components and circuits can be protected.

[0071] For each power management module 1041, after receiving the first voltage, the power management module 1041 is used to convert the first voltage into a first working voltage and a second working voltage, respectively, so as to power the first low-voltage load 101 and the second low-voltage load 102 in the area corresponding to the power management module 1041, respectively.

[0072] Based on the above content, it can be known that the above embodiment mainly describes the process of how to supply power to the first low-voltage load 101 and the second low-voltage load 102 based on the power battery 103 when the power battery 103 is in working state.

[0073] The following describes a process of how to supply power to the first low-voltage load 101 and the second low-voltage load 102 based on the low-voltage power supply 1042 when the power battery 103 is in a stopped working state.

[0074] The low-voltage power supply 1042 is used to output a second low voltage, wherein the second low voltage is 48V. In other implementations, the second low voltage may also be other voltage values, such as 36V, etc., which is not limited here.

[0075] The power management module 1041 is also connected to the low-voltage power supply 1042, and is used to receive a second voltage output by the low-voltage power supply 1042, and when the power battery 1043 stops working, convert the second voltage into the first working voltage and the second working voltage, respectively, to power the first low-voltage load 101 and the second low-voltage load 102 in the area corresponding to the power management module 1041, respectively.

[0076] Based on the above content, it can be known that in the embodiment of the present disclosure, for the first low-voltage load and the second low-voltage load with different operating voltages, the operating voltage can be provided to them based on the power battery when the power battery is in a working state, and they can also be powered by a low-voltage power supply in the device when the power battery is in a stopped working state.

[0077] In addition, since the multiple power management modules included in the power management device correspond to one area respectively, the first low-voltage load and the second low-voltage load within the range can be powered nearby, thus reducing the cost of the wiring harness.

[0078] See also Figure 5 , is a principle block diagram of a power management module provided by an embodiment of the present disclosure. Figure 5 As shown in , the power management module 1041 includes a bidirectional voltage conversion unit 10411, and the voltage conversion module 1043 includes an input terminal 10431 and an output terminal 10432. The input terminal 10431 of the voltage conversion module 1043 is connected to the power battery 103, the voltage conversion module 1043 receives the high voltage output by the power battery 103 through the input terminal 10431, and converts the high voltage into a first voltage, and the output terminal 10432 of the voltage conversion module 1043 is connected to the bidirectional voltage conversion unit 10411, and is used to convert the first voltage output by the voltage conversion module 1043 into the second working voltage to supply power to the second low-voltage load in the area corresponding to the power management module 1041.

[0079] It can be understood that when the power battery 103 is in working state, it is powered by the power battery 103. Therefore, the first voltage output by the voltage conversion module 1043 can be converted into a second working voltage by the bidirectional voltage conversion unit 10411 to power the second low-voltage load in the area corresponding to the power management module 1041.

[0080] For example, if the high voltage output by the power battery 103 is 800V, the high voltage can be converted into a first voltage by the voltage conversion module 1043, and the first voltage can be 12V. Further, the bidirectional voltage conversion unit 10411 can convert the first voltage of 12V into a second working voltage, for example, the second working voltage can be 48V, so as to supply power to the second low-voltage load. Here, the working voltage of the second low-voltage load is 48V.

[0081] The bidirectional voltage conversion unit 10411 is also connected to the low-voltage power supply 1042, and is used to convert the second voltage output by the low-voltage power supply 1042 into the first operating voltage when the power battery 103 stops working, so as to power the first low-voltage load in the area corresponding to the power management module 1041.

[0082] Here, when the power battery 103 stops working, it is necessary to supply power to the load through the low-voltage power supply 1042. Therefore, it is necessary to convert the second voltage output by the low-voltage power supply 1042 into a first working voltage through the bidirectional voltage conversion unit 10411 to power the first low-voltage load in the area corresponding to the power management module 1041.

[0083] For example, the working voltage of the first low-voltage load is 12V, and the second voltage output by the low-voltage power supply 1042 is 48V. The bidirectional voltage conversion unit 1042 can convert the second voltage of 48V into a first working voltage, wherein the first working voltage is 12V, thereby powering the first low-voltage load with a working voltage of 12V.

[0084] Please see again Figure 5 The power management module 1041 also includes an input terminal 10412, a first output terminal 10413 and a second output terminal 10414, and the bidirectional voltage conversion unit 10411 includes a first connection terminal 01 and a second connection terminal 02.

[0085] The following describes a process of supplying power to the first low-voltage load 101 and the second low-voltage load 102 in the area corresponding to the power management module 1041 when the power battery 103 is in working state.

[0086] The output terminal 10432 of the voltage conversion module 1043 is connected to the input terminal 10412 of the power management module 1041. Specifically, when the power battery 103 is in working state, the power management module 1041 uses the received first voltage as the first working voltage and outputs it through the first output terminal 10413 to supply power to the first low-voltage load in the area corresponding to the power management module 1041. Here, the first voltage received by the power management module 1041 is the same as the first working voltage of the first low-voltage load, and the power management module 1041 can directly use the received second voltage as the first working voltage to supply power to the first low-voltage load 101.

[0087] The first connection terminal 01 of the bidirectional voltage conversion unit 10411 is connected to the input terminal 10412 of the power management module 1041, and the second connection terminal 02 of the bidirectional voltage conversion unit 10411 is connected to the second output terminal 10414 of the power management module 1041. The bidirectional voltage conversion unit 10411 is also used to receive the first voltage output by the voltage conversion module 1043 through the input terminal 10412 of the power management module 1041, and convert the first voltage output by the voltage conversion module 1043 into the second working voltage, and output it to the second output terminal 10414 of the power management module 1041 through the second connection terminal 02 of the bidirectional voltage conversion unit 10411, so as to power the second low-voltage load 102 in the area corresponding to the power management module 1041 through the second output terminal 10414 of the power management module 1041.

[0088] It should be noted that when the power battery 103 is working, the low-voltage power supply 1042 will not supply power to the first low-voltage load and the second low-voltage load.

[0089] Specifically, the low-voltage power supply 1042 can be connected to the second output terminal 10414 of the power management module 1041 through a switching unit. When the power battery 103 is in working state, the switching unit between the low-voltage power supply 1042 and the second output terminal 10414 of the power management module 1041 can be controlled to be disconnected, thereby ensuring that the low-voltage power supply 1042 does not output voltage through the second output terminal 10414.

[0090] Optionally, the low-voltage power supply 1042 is also connected to the second connection terminal 02 of the bidirectional voltage conversion unit 10411, and the bidirectional voltage conversion unit 10411 is also used to convert the first voltage into a charging voltage to charge the low-voltage power supply 1042 when the power level of the low-voltage power supply 1042 is lower than a preset power level, wherein the charging voltage is the same as the second voltage.

[0091] Here, the preset power can be set according to actual needs. For example, the preset power can be 50% of the total power that the low-voltage power supply can store, or it can be 30% of the total power that the low-voltage power supply can store. There is no limitation here.

[0092] The following describes a process of supplying power to the first low-voltage load 101 and the second low-voltage load 102 in the area corresponding to the power management module 1041 when the power battery 103 is in a stopped state.

[0093] like Figure 5 As shown in, the low-voltage power supply 1042 includes an output terminal 10421. According to the above embodiment, the low-voltage power supply 1042 is connected to the second output terminal 10414 of the power management module 1041, that is, the output terminal 10421 of the low-voltage power supply 1042 is connected to the second output terminal 10414 of the power management module 1041. When the power battery 103 is in a stopped working state, the power management module 1041 uses the second voltage output by the low-voltage power supply 1042 as the second working voltage, and outputs it through the second output terminal 10414 of the power management module 1041 to power the second low-voltage load 102 in the area corresponding to the power management module 1041.

[0094] In some embodiments, if there is a switching unit between the low-voltage power supply 1042 and the second output terminal 10414 of the power management module 1041, then when the power battery 103 is in a stopped working state, the switching unit between the low-voltage power supply 1042 and the second output terminal 10414 of the power management module 1041 can be controlled to be turned on, so that the second low-voltage load 102 can be powered based on the second voltage output by the low-voltage power supply 1042.

[0095] At the same time, since the low-voltage power supply 1042 is also connected to the second connection terminal 02 of the bidirectional voltage conversion unit 10411, and the first connection terminal 01 of the bidirectional voltage conversion unit 10411 is connected to the first output terminal 10413 of the power management module 1041, the bidirectional voltage conversion unit 10411 can convert the second voltage received through the second connection terminal 02 into the first working voltage, and output it to the first output terminal 10413 of the power management module 1041 through the first connection terminal 01 of the bidirectional voltage conversion unit, so as to output the first working voltage through the first output terminal 10413 to power the first low-voltage load 101 in the area corresponding to the power management module 1041.

[0096] Optionally, the bidirectional voltage conversion unit 10411 may include a transformer (not shown), and the transformer includes a first coil and a second coil; the first connection terminal 01 of the bidirectional voltage conversion unit 10411 corresponds to the connection terminal of the first coil of the transformer, and the second connection terminal 02 of the bidirectional voltage conversion unit 10422 corresponds to the connection terminal of the second coil of the transformer.

[0097] See also Figure 6 , is a circuit diagram of a bidirectional voltage conversion unit provided by an embodiment of the present disclosure. Figure 6 As shown in , the bidirectional voltage conversion unit 10411 may include a transformer T, electronic switches K1 - K8 , the transformer T includes a first coil T1 and a second coil T2 , a connection end 10 of the first coil and a connection end 20 of the second coil.

[0098] Here, if the power battery 103 is working, the connection terminal 10 of the first coil receives the first voltage, which can control the conduction of some electronic switches, and perform voltage conversion through the transformer T, so that the connection terminal 20 of the second coil outputs the second working voltage; if the power battery 103 stops working, the connection terminal 20 of the second coil receives the second voltage, which can also control the conduction of some electronic switches, and perform voltage conversion through the transformer T, so that the connection terminal 10 of the first coil outputs the first working voltage.

[0099] Specifically, after the connection end 10 of the first coil receives the first voltage, the electronic switch K1 and the electronic switch K4 can be controlled to be closed, and the electronic switch K2 and the electronic switch K3 can be controlled to be disconnected, so that an alternating current can be generated in the first coil T1, and a corresponding current can be generated in the second coil T2, so that the connection end 20 of the second coil T2 outputs a corresponding direct current voltage. Similarly, voltage conversion can also be performed in the opposite direction, which will not be described in detail here.

[0100] Here, the on and off of each electronic switch K1 - K8 may be controlled by a control unit in the voltage management device, or may be controlled by a control unit outside the voltage management device, which is not limited here.

[0101] in, Figure 5 The inductor L1 and the capacitor C1 connected to the first coil T1 and the inductor L2 and C2 connected to the second coil T2 are used to filter and rectify the current in the circuit.

[0102] In this implementation manner, the first coil and the second coil can achieve voltage isolation between the two connection ends, which is beneficial to protecting the circuit.

[0103] See also Figure 7 , is a flow chart of a power management method provided by an embodiment of the present disclosure, such as Figure 7 As shown in , the power management method is applied to the aforementioned vehicle 100, the vehicle includes a power battery, a first low-voltage load, a second low-voltage load and a low-voltage power supply, the first low-voltage load and the second low-voltage load have different operating voltages; the method includes the following steps S701-S702:

[0104] S701, when it is detected that the power battery is in a working state, converting the high voltage output by the power battery into a first working voltage and a second working voltage, and supplying power to the first low-voltage load and the second low-voltage load based on the first working voltage and the second working voltage.

[0105] Here, when it is detected that the power battery is in working state, the power management device converts the high voltage output by the power battery into a first working voltage and a second working voltage, and outputs the first working voltage and the second working voltage to the first low voltage load and the second low voltage load respectively.

[0106] Optionally, when the high voltage output by the power battery is converted into a first working voltage and a second working voltage, and the first low voltage load and the second low voltage load are powered based on the first working voltage and the second working voltage, the high voltage output by the power battery can be converted into a first voltage, and then the first voltage can be converted into the first working voltage and the second working voltage, and the first low voltage load and the second low voltage load are powered based on the first working voltage and the second working voltage.

[0107] It is understandable that since the power battery outputs a high voltage, it is not compatible with the working voltage of the load. Therefore, the load can be protected by converting the high voltage into a first low voltage, and then supplying power to the first low voltage load and the second low voltage load based on the first voltage.

[0108] Optionally, the power of the low-voltage power supply can be obtained, and when the power of the low-voltage power supply is lower than a preset power, the first voltage output by the power battery is converted into a charging voltage to charge the low-voltage power supply.

[0109] Among them, the preset power can be set according to actual needs. For example, it can be 50% of the total power that the power supply can store, or it can be 40% of the total power that the power supply can store, etc., which is not limited here. This can ensure that the power supply will not be fed back.

[0110] It is understandable that the power supply can also be obtained.

[0111] S702, when it is detected that the power battery is in a stopped working state, converting the second voltage output by the low-voltage power supply into the first working voltage and the second working voltage, and supplying power to the first low-voltage load and the second low-voltage load based on the first working voltage and the second working voltage.

[0112] In this step, when it is detected that the power battery is in a stopped working state (vehicle sleep state), the vehicle still needs to be powered by static power consumption. At this time, the second voltage output by the low-voltage power supply can be converted into a first working voltage and a second working voltage to power the first low-voltage load and the second low-voltage load.

[0113] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0114] In addition, for the detailed description of the processing flow of each step in the method, reference can be made to the relevant description in the above-mentioned device embodiment, which will not be described in detail here.

[0115] Corresponding to the above-mentioned vehicle detection method, the present disclosure provides an electronic device 800, such as Figure 8 As shown, it is a schematic diagram of the structure of an electronic device 800 provided in an embodiment of the present disclosure, including: a processor 810, a memory 820 and a bus 830, wherein the memory 820 is used to store execution instructions.

[0116] In the embodiment of the present application, the memory 820 is specifically used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 810. That is, when the electronic device 800 is running, the processor 810 communicates with the memory 820 through the bus 830, so that the processor 810 executes the application code stored in the memory 820, and then executes the second vehicle detection method described in the above method embodiment.

[0117] Among them, the memory 820 can be, but is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-Only Memory, PROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable read-only memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.

[0118] The processor 810 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0119] It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 800. In other embodiments of the present application, the electronic device 800 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0120] The present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any power management method described in the above method embodiment are executed. The storage medium can be a volatile or non-volatile computer-readable storage medium.

[0121] An embodiment of the present disclosure provides a computer program product, including a computer program, characterized in that when the computer program is executed, the steps of the power management method described in any possible implementation manner described above are implemented.

[0122] Each module in the embodiments of the present disclosure may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, a core network device, an OAM or other programmable device.

[0123] The computer program or instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; it may also be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0124] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present disclosure, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A power management device for a low voltage system, characterized in that: Applied to a vehicle, the vehicle comprises a power battery, a first low-voltage load and a second low-voltage load, the first low-voltage load and the second low-voltage load have different operating voltages; the vehicle is provided with a plurality of areas, the device comprises a plurality of power management modules and a low-voltage power supply, each power management module corresponds to one area; For each power management module, the input end of the power management module is connected to the power battery, and the output end of the power management module is connected to the first low-voltage load and the second low-voltage load in the corresponding area, so as to provide corresponding working voltages to the first low-voltage load and the second low-voltage load in the corresponding area based on the power battery; The input end of the power management module is also connected to the low-voltage power supply, and is used to provide corresponding working voltages for the first low-voltage load and the second low-voltage load in the corresponding area based on the low-voltage power supply.

2. The device according to claim 1, characterized in that The device further comprises a voltage conversion module; an input end of the voltage conversion module is connected to the power battery, and an output end of the voltage conversion module is connected to the multiple power management modules respectively; The voltage conversion module is used to convert the high voltage output by the power battery into a first low voltage, and output the first low voltage to the multiple power management modules respectively.

3. The device according to claim 2, characterized in that The low-voltage power supply is used to output a second low voltage, and the second low voltage is 48V; The first low voltage output by the voltage conversion module is 12V.

4. The power management device for a low voltage system according to claim 2, characterized in that: The power management module is specifically configured to provide corresponding operating voltages to the first low-voltage load and the second low-voltage load in the corresponding area based on the low-voltage power supply when the power battery stops working.

5. The device according to claim 4, characterized in that The power management module includes a bidirectional voltage conversion unit; The bidirectional voltage conversion unit is connected to the voltage conversion module, and is used to convert the first low voltage output by the voltage conversion module into the second working voltage to supply power to the second low voltage load in the area corresponding to the power management module; The bidirectional voltage conversion unit is also connected to the low-voltage power supply, and is used to convert the second low voltage output by the low-voltage power supply into the first operating voltage to power the first low-voltage load in the area corresponding to the power management module.

6. The device according to claim 5, characterized in that The bidirectional voltage conversion unit includes a transformer, which includes a first coil and a second coil; the first connection end of the bidirectional voltage conversion unit corresponds to the connection end of the first coil of the transformer, and the second connection end of the bidirectional voltage conversion unit corresponds to the connection end of the second coil of the transformer.

7. The device according to claim 5, characterized in that The bidirectional voltage conversion unit is also used to convert the first voltage into a charging voltage to charge the low-voltage power supply when the power level of the low-voltage power supply is lower than a preset power level, wherein the charging voltage is the same as the second voltage.

8. A vehicle, characterized in that: Comprising a power battery, a first low-voltage load, a second low-voltage load, and the power management device according to any one of claims 1 to 7; The power battery is connected to the power management device, and the power management device is used to supply power to the first low-voltage load and the second low-voltage load respectively based on the voltage provided by the power battery.

9. A power management method for a low voltage system, characterized in that: Applied to a vehicle, the vehicle comprises a power battery, a first low-voltage load, a second low-voltage load and a low-voltage power supply, the first low-voltage load and the second low-voltage load have different operating voltages; the method comprises: When it is detected that the power battery is in a working state, converting the high voltage output by the power battery into a first working voltage and a second working voltage, and supplying power to the first low-voltage load and the second low-voltage load based on the first working voltage and the second working voltage; When it is detected that the power battery is in a stopped working state, the second voltage output by the low-voltage power supply is converted into the first working voltage and the second working voltage, and the first low-voltage load and the second low-voltage load are powered based on the first working voltage and the second working voltage.

10. The method according to claim 9, characterized in that The method further comprises: Obtaining the power of the low-voltage power supply; When the power level of the low-voltage power supply is lower than a preset power level, the high voltage output by the power battery is converted into a charging voltage to charge the low-voltage power supply, and the charging voltage is the same as the second voltage.

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