Vehicle low-voltage energy management method and device, electronic equipment, storage medium and vehicle

Abstract

The invention discloses a vehicle low-voltage energy management method and device, electronic equipment, a storage medium and a vehicle. The method is characterized by comprising the following steps: detecting whether a vehicle has a high-voltage power-on demand or not; when no high-voltage power-on requirement exists, a direct-current converter electrically connected with the power battery is turned off, the photovoltaic generator is controlled to supply power to a low-voltage electric appliance of the vehicle, and the direct-current converter, the photovoltaic generator and the storage battery are electrically connected with the low-voltage electric appliance of the vehicle after being connected in parallel; when a high-voltage power-on demand exists, the photovoltaic generator is controlled to stop supplying power to the low-voltage electric appliance, the direct-current converter is started, and the power battery is controlled to supply power to the low-voltage electric appliance through the direct-current converter. According to the invention, it is ensured that only the power battery or the photovoltaic generator supplies power at the same time, so that the storage battery is prevented from being damaged due to the fact that the photovoltaic generator needs to provide higher voltage when the power battery and the photovoltaic generator supply power at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-related technologies, and in particular to a vehicle low-voltage energy management method, device, electronic equipment, storage medium and vehicle. Background Art

[0002] With the improvement of vehicle intelligence, the functions of the whole vehicle are becoming more and more abundant, and the scenarios involved in vehicle intelligence are also increasing. In many scenarios, the power battery of electric vehicles does not need or cannot be supplied with high voltage (correspondingly, oil vehicles do not need or cannot start the generator). Scenarios that do not require high voltage include sentinel mode or off-vehicle refrigerator operation. In such scenarios, if high voltage is applied, the high-voltage-related network segments need to be awakened, resulting in additional power consumption; scenarios that cannot provide high voltage include waiting for rescue after a collision, high voltage under thermal runaway, etc. At this time, the battery needs to be maintained for as long as possible. In scenarios where high voltage is not needed or cannot be applied, the battery alone maintains power supply for the entire vehicle. However, since the battery power is usually limited, the maintenance time is also limited.

[0003] Solar power generation technology is relatively mature, but there are few examples of its use in vehicles. The main reasons are the low amount of solar power generation and the additional cost of voltage converters required to directly charge power batteries. If photovoltaic generators are used to power low-voltage electrical appliances, since low-voltage electrical appliances are generally connected to batteries and DC converters, photovoltaic generators will be connected in parallel with batteries and DC converters. If photovoltaic power generation is required to provide power first, the voltage of photovoltaic power generation needs to be increased, resulting in excessive voltage of the battery, which can damage the battery.

[0004] Therefore, the prior art has the technical problem that photovoltaic power generation affects the voltage of the battery, which easily causes damage to the battery. Summary of the invention

[0005] Based on this, it is necessary to provide a vehicle low-voltage energy management method, device, electronic device, storage medium and vehicle to address the technical problem in the prior art that photovoltaic power generation affects the voltage of the battery and easily causes damage to the battery.

[0006] The present invention provides a vehicle low-voltage energy management method, comprising:

[0007] Detect whether the vehicle needs to be powered on with high voltage;

[0008] When there is no high-voltage power-on demand, the DC converter electrically connected to the power battery is turned off, and the photovoltaic generator is controlled to supply power to the low-voltage electrical appliances of the vehicle, and the DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the low-voltage electrical appliances of the vehicle;

[0009] When there is a need to power on high voltage, the photovoltaic generator is controlled to stop supplying power to the low voltage electrical appliance, and the DC converter is started to control the power battery to supply power to the low voltage electrical appliance through the DC converter.

[0010] Furthermore, controlling the photovoltaic generator to supply power to low-voltage electrical appliances of the vehicle includes: controlling the photovoltaic generator to use a voltage that is the same as the output voltage of the DC converter to supply power to the low-voltage electrical appliances of the vehicle.

[0011] Furthermore, after supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises:

[0012] Set the vehicle network to non-network wake-up working mode.

[0013] Furthermore, after supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises:

[0014] The vehicle is set to a segment-based wake-up mode, in which multiple segments of the vehicle take turns to sleep or wake up.

[0015] Furthermore, the detecting whether the vehicle has a high voltage power-on requirement includes:

[0016] When the vehicle is powered off, check whether the vehicle needs to be powered on with high voltage.

[0017] Furthermore, the detecting whether the vehicle has a high-voltage power-on requirement when the vehicle is powered off includes: when the vehicle is powered off, dormant network, and detecting whether the vehicle has a high-voltage power-on requirement after starting the dormant timer;

[0018] The method further includes: after the sleep timer ends, waking up the network, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliance, starting the DC converter, and controlling the power battery to supply power to the low-voltage electrical appliance through the DC converter.

[0019] Furthermore, the method further includes: after the entire vehicle is powered on, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliances.

[0020] The present invention provides a vehicle low-voltage energy management device, comprising:

[0021] A demand detection module is used to detect whether the vehicle has a high voltage power-on demand;

[0022] A module without high-voltage power-on demand is used to shut down the DC converter electrically connected to the power battery when there is no high-voltage power-on demand, and control the photovoltaic generator to supply power to the low-voltage electrical appliances of the vehicle. The DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the low-voltage electrical appliances of the vehicle;

[0023] A high-voltage power-on demand module is used to control the photovoltaic generator to stop supplying power to the low-voltage electrical appliances when there is a high-voltage power-on demand, and to start the DC converter to control the power battery to supply power to the low-voltage electrical appliances through the DC converter.

[0024] The present invention provides an electronic device, comprising:

[0025] at least one processor; and,

[0026] a memory communicatively connected to at least one of the processors; wherein,

[0027] The memory stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one of the processors to perform the vehicle low-voltage energy management method as described above.

[0028] The present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the vehicle low-voltage energy management method as described above.

[0029] The present invention provides a vehicle, comprising the vehicle low-voltage energy management device as described above, or the electronic device as described above.

[0030] The present invention detects the vehicle to ensure that only the power battery or the photovoltaic generator is supplying power at the same time. Since the photovoltaic generator, the DC converter and the storage battery are in parallel, when it is ensured that only the power battery or the photovoltaic generator is supplying power at the same time, it is avoided that when the power battery and the photovoltaic generator are supplying power at the same time, the photovoltaic generator needs to provide a higher voltage and damages the storage battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a working flow chart of a vehicle low-voltage energy management method according to an embodiment of the present invention;

[0032] Figure 2 A flowchart of a vehicle low-voltage energy management method according to another embodiment of the present invention;

[0033] Figure 3 This is a vehicle power distribution diagram of the best embodiment of the present invention;

[0034] Figure 4 A schematic diagram of communication between an electronic device and a photovoltaic generator in a preferred embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of the overall scheme of the best embodiment of the present invention;

[0036] Figure 6This is a working flow chart of the vehicle low-voltage energy management method of the best embodiment of the present invention when the refrigerator on the electric vehicle is delayed in operation under the vehicle;

[0037] Figure 7 This is a working flow chart of the vehicle low-voltage energy management method of the best embodiment of the present invention when it is applied in the vehicle-leaving sentinel mode;

[0038] Figure 8 A schematic diagram of a low-voltage energy management device for a vehicle according to an embodiment of the present invention;

[0039] Fig. 9 The figure is a schematic diagram of the hardware structure of an electronic device of the present invention. DETAILED DESCRIPTION

[0040] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same components are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0041] like Figure 1 The figure shows a working flow chart of a vehicle low-voltage energy management method according to an embodiment of the present invention, including:

[0042] Step S101, detecting whether the vehicle has a high voltage power-on requirement;

[0043] Step S102, when there is no high-voltage power-on demand, turning off the DC converter electrically connected to the power battery, and controlling the photovoltaic generator to supply power to the low-voltage electrical appliances of the vehicle, the DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the low-voltage electrical appliances of the vehicle;

[0044] Step S103, when there is a high voltage power-on demand, control the photovoltaic generator to stop supplying power to the low voltage electrical appliance, start the DC converter, and control the power battery to supply power to the low voltage electrical appliance through the DC converter.

[0045] Specifically, the present invention can be applied to electronic devices with processing capabilities, such as an Electronic Control Unit (ECU) of a vehicle.

[0046] In some embodiments, the vehicle low-voltage energy management method of the present invention is applied to a vehicle control unit (VCU).

[0047] First, the electronic device executes step S101 to detect whether the vehicle has a high voltage power-on requirement.

[0048] Specifically, the vehicle is scene-recognized to determine whether the vehicle has a high-voltage power-on requirement based on the current scene.

[0049] When there is no high-voltage power-on requirement, step S102 is executed, and when there is a high-voltage power-on requirement, step S103 is executed.

[0050] like Figure 3 The figure shows the power distribution diagram of the whole vehicle including the photovoltaic generator, wherein the photovoltaic generator 1 is connected to the power supply network as a kind of power supply, and is connected in parallel with the battery 2, the direct current converter (Direct Current, DC converter) 3, and various low-voltage electrical appliances 4. The direct current converter 3 is electrically connected to the power battery 5 through the high-voltage bus to convert the high-voltage direct current into low-voltage direct current.

[0051] The photovoltaic generator 1 includes a photovoltaic power generation actuator 11 and a photovoltaic power generation controller 12 connected by hard wires. The photovoltaic power generation actuator 11 is used for photovoltaic power generation. The photovoltaic power generation actuator 11 is electrically connected to the low-voltage electrical appliance 4 through the photovoltaic power generation controller 12. The photovoltaic generator 12 controls the photovoltaic power generation actuator 11 to turn on or off. The electronic device 6, such as a VCU, is communicatively connected to the low-voltage battery controller 7, and the electronic device 6 is communicatively connected to the photovoltaic power generation controller 12 through a bus, such as a controller area network (CAN) bus. The electronic device 6 controls the photovoltaic power generation actuator 11 to turn on or off by sending an on / off instruction to the photovoltaic power generation controller 12. The low-voltage battery controller 7 is hard wired to the battery 2.

[0052] When there is no high voltage power-on demand, step S102 is executed to turn off the DC converter electrically connected to the power battery, and control the photovoltaic generator to supply power to the low voltage electrical appliances of the vehicle. Therefore, at this time, only the photovoltaic generator 1 supplies power to the low voltage electrical appliances 4.

[0053] When there is a need to power on high voltage, step S103 is executed to control the photovoltaic generator to stop supplying power to the low voltage electrical appliances, and to start the DC converter to control the power battery to supply power to the low voltage electrical appliances through the DC converter. Therefore, at this time, only the power battery 5 supplies power to the low voltage electrical appliances 4 through the DC converter 3.

[0054] Among them, Figure 4As shown, the electronic device 6, such as VCU, includes at least the following functions: 1. Scene recognition. 2. Photovoltaic power generation notification. 3. Timing and timed wake-up network. Through bus communication such as CAN / Local Interconnect Network (LIN) / Ethernet (ETH), an on / off instruction is sent to the photovoltaic power generation controller 12, and the photovoltaic power generation controller 12 controls the photovoltaic power generation actuator 11 to turn on or off according to the received on or off instruction. The photovoltaic power generation controller 12 also sends a status signal to the electronic device 6 to feedback the current working status of the photovoltaic generator 1.

[0055] In the energy management involved in this article, the DC converter does not work, and the voltage of photovoltaic power generation is equivalent to the DC converter, which avoids damage to the battery due to excessive voltage. The development trend of batteries is lithium batteries. Some OEMs on the market have adopted lithium batteries, and lithium batteries are more sensitive to voltage. Therefore, making the voltage of the photovoltaic generator and the DC converter equivalent can ensure the priority power supply of photovoltaic power generation and avoid battery damage.

[0056] The present invention rationally uses photovoltaic generators in energy management in different scenarios, and the photovoltaic generators are preferably installed on the roof of the vehicle, thereby bringing more and more perceptible energy benefits to users by making full use of the limited power generation capacity of the limited solar roof.

[0057] The present invention detects the vehicle to ensure that only the power battery or the photovoltaic generator is supplying power at the same time. Since the photovoltaic generator, the DC converter and the storage battery are in parallel, when it is ensured that only the power battery or the photovoltaic generator is supplying power at the same time, it is avoided that when the power battery and the photovoltaic generator are supplying power at the same time, the photovoltaic generator needs to provide a higher voltage and damages the storage battery.

[0058] like Figure 2 The figure shows a working flow chart of a vehicle low-voltage energy management method in another embodiment of the present invention, including:

[0059] Step S201, detecting whether the vehicle has a high voltage power-up requirement.

[0060] In one embodiment, the detecting whether the vehicle has a high voltage power-on requirement includes:

[0061] When the vehicle is powered off, check whether the vehicle needs to be powered on with high voltage.

[0062] Step S202, when there is no high-voltage power-on demand, turn off the DC converter electrically connected to the power battery, and control the photovoltaic generator to use the same voltage as the output voltage of the DC converter to power the vehicle's low-voltage electrical appliances. The DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the vehicle's low-voltage electrical appliances.

[0063] In one embodiment, after supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises:

[0064] Set the vehicle network to non-network wake-up working mode.

[0065] In one embodiment, after supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises:

[0066] The vehicle is set to a segment-based wake-up mode, in which multiple segments of the vehicle take turns to sleep or wake up.

[0067] Step S203, when there is a high voltage power-on demand, control the photovoltaic generator to stop supplying power to the low voltage electrical appliances, start the DC converter, and control the power battery to supply power to the low voltage electrical appliances through the DC converter.

[0068] In one of the embodiments, the method further includes: after the vehicle is powered on, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliances.

[0069] In one of the embodiments, the detecting whether the vehicle has a high voltage power-on requirement when the vehicle is powered off includes: when the vehicle is powered off, dormant network, and detecting whether the vehicle has a high voltage power-on requirement after starting the dormant timer;

[0070] The method further includes: after the sleep timer ends, waking up the network, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliance, starting the DC converter, and controlling the power battery to supply power to the low-voltage electrical appliance through the DC converter.

[0071] Specifically, step S201 is first executed to detect whether the vehicle has a high voltage power-on requirement.

[0072] In one embodiment, the detecting whether the vehicle has a high voltage power-on requirement includes:

[0073] When the vehicle is powered off, check whether the vehicle needs to be powered on with high voltage.

[0074] Specifically, since the power battery generally does not supply power after the vehicle is powered off, this embodiment detects whether there is a need to power on a high voltage when the vehicle is powered off, and then controls the photovoltaic generator or the power battery to supply power according to whether there is a need to power on a high voltage. When the vehicle is powered off, some low-voltage electrical appliances, such as a car refrigerator, still have a need for electricity. Therefore, depending on whether there is a need to power on a high voltage, the photovoltaic generator or the power battery is controlled to supply power to the low-voltage electrical appliances.

[0075] Then, when there is no high-voltage power-on demand, step S202 is executed to turn off the DC converter electrically connected to the power battery, and control the photovoltaic generator to use the same voltage as the output voltage of the DC converter to power the vehicle's low-voltage electrical appliances. The DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the vehicle's low-voltage electrical appliances.

[0076] Specifically, the voltage of the photovoltaic generator is equivalent to the DC converter (DCDC), which avoids damage to the battery due to excessive voltage. Secondly, the development trend of batteries is lithium batteries. Some OEMs on the market have adopted lithium batteries, and lithium batteries are more sensitive to voltage. Therefore, making the voltage of the photovoltaic generator and the DC converter equivalent can not only ensure the priority power supply of photovoltaic power generation, but also avoid damage to the battery.

[0077] In one embodiment, after supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises:

[0078] Set the vehicle network to non-network wake-up working mode.

[0079] Specifically, because it involves work under the order of the whole vehicle, network management needs to be supported. To further save power, you can choose to add a no-network wake-up working mode that does not wake up the network segment when the whole vehicle is powered off. This mode is specifically manifested as follows: 1. The whole vehicle can work normally when it is powered off. 2. When the whole vehicle is powered off and working normally, it does not send network management messages or application messages, so it does not wake up the network segment. 3. The messages of other ECUs can be received and responded to when the whole vehicle is powered off.

[0080] In the non-network wake-up working mode, the entire vehicle network is dormant, and only some low-voltage electrical appliances installed in the vehicle, such as the car refrigerator, remain working. These low-voltage electrical appliances that remain working are powered by photovoltaic generators.

[0081] This embodiment sets the entire vehicle to a non-network wake-up working mode and uses a photovoltaic generator to power low-voltage electrical appliances, thereby further saving electricity.

[0082] In one embodiment, after supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises:

[0083] The vehicle is set to a segment-based wake-up mode, in which multiple segments of the vehicle take turns to sleep or wake up.

[0084] Specifically, the present embodiment sets the vehicle to a segment wake-up mode, i.e., a CAN network partial network management (PN) mode. In the segment wake-up mode, multiple segments of the vehicle are awakened in turn, while other segments are dormant. When the vehicle is set to the segment wake-up mode, the photovoltaic generator is controlled to supply power to low-voltage electrical appliances. Since multiple segments are awakened in turn, energy consumption is further saved while powering by the photovoltaic generator.

[0085] When there is a need to power on high voltage, step S203 is executed to control the photovoltaic generator to stop supplying power to the low voltage electrical appliance, and start the DC converter to control the power battery to supply power to the low voltage electrical appliance through the DC converter.

[0086] When there is a need for high-voltage power supply, it is necessary to supply power through the power battery through the DC converter. At this time, the photovoltaic generator is stopped to avoid damaging the battery due to excessive power supply voltage at the same time.

[0087] This embodiment more reasonably applies photovoltaic power generation to energy management in different scenarios, bringing more and more perceptible energy consumption reduction benefits to users and increasing the life of the battery.

[0088] The vehicle low-voltage energy management method of this embodiment can apply photovoltaic power generation to the energy management scenarios of the whole vehicle without high voltage, including the delayed operation of the on-board refrigerator when the whole vehicle is powered off, the sentinel mode when the whole vehicle is powered off, the waiting rescue mode, thermal runaway, etc. More reasonably, photovoltaic power generation is applied to energy management in different scenarios, bringing more and more perceptible energy consumption reduction benefits to users and increasing the life of the battery.

[0089] This embodiment avoids the cost increase caused by the DC converter between the photovoltaic generator and the power battery by connecting the photovoltaic power generation to the low-voltage circuit instead of directly charging the power battery, which is more feasible.

[0090] This embodiment applies photovoltaic power generation to energy management scenarios that do not require high voltage, which can better adapt to lithium batteries. Lithium batteries are sensitive to charging voltage. If the DC converter (or oil truck generator) is working, the DC converter output voltage is greater than the lithium battery output voltage. If photovoltaic power generation is used before the current output by the DC converter, the voltage of photovoltaic power generation must be greater than the voltage at the output end of the DC converter, which increases the possibility of damage to the lithium battery. Therefore, this embodiment applies photovoltaic power generation to energy management scenarios that do not require high voltage. In this scenario, as long as the voltage of photovoltaic power generation is equal to the voltage of the DC converter, photovoltaic power generation can be used before the battery, and the battery is safe under the voltage of the DC converter, thereby avoiding damage to the battery.

[0091] In one of the embodiments, the method further includes: after the vehicle is powered on, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliances.

[0092] Specifically, after the vehicle is powered on, the power battery starts to supply power, so the photovoltaic generator is controlled to stop supplying power to low-voltage electrical appliances to avoid damage to the battery due to excessive voltage.

[0093] In one of the embodiments, the detecting whether the vehicle has a high voltage power-on requirement when the vehicle is powered off includes: when the vehicle is powered off, dormant network, and detecting whether the vehicle has a high voltage power-on requirement after starting the dormant timer;

[0094] The method further includes: after the sleep timer ends, waking up the network, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliance, starting the DC converter, and controlling the power battery to supply power to the low-voltage electrical appliance through the DC converter.

[0095] Specifically, after the vehicle is powered off, the vehicle sleep time can be set. During the sleep time, the vehicle network will not be awakened. At the same time, depending on whether the vehicle has a high-voltage power-on demand, the photovoltaic generator or power battery will be used to power low-voltage electrical appliances. After the sleep period ends, the network will be awakened, and the photovoltaic generator will stop supplying power, and the power battery will be used.

[0096] This embodiment adds timing control for network dormancy, and after the network wakes up, stops the photovoltaic generator from supplying power to avoid damage to the battery due to excessive voltage.

[0097] like Figure 5 It is a schematic diagram of the overall scheme of the best embodiment of the present invention, including a power supply scheme 501, a network management scheme 502, and a signal and control scheme 503.

[0098] The power supply scheme 501 includes: when the photovoltaic generator is connected to the low-voltage network, the scenario in which the DC converter is not working is selected to connect the power supply, and at the same time, the voltage sensitivity characteristics of the lithium battery, the photovoltaic power generation voltage characteristics and the voltage conversion cost are considered.

[0099] The network management solution 502 includes: the reasonable use of PN segment network management or other power-saving network management strategies to balance photovoltaic power generation and consumption as much as possible, maximize the proportion of photovoltaic energy consumption, and consider the value of the low-voltage energy consumption of the whole vehicle and the power generation of photovoltaic power generation in the specific scenario of the whole vehicle being powered off, as well as the utilization rate of photovoltaic power generation.

[0100] The signal and control scheme 503 includes: VCU can be responsible for the main control, including enabling, status collection, timing, scene scene recognition, logic main control and network management execution. It also includes specific control methods to support the entire function.

[0101] like Figure 6 The flowchart of the vehicle low-voltage energy management method according to the best embodiment of the present invention is applied to the delayed operation of the refrigerator mounted on the electric vehicle, including:

[0102] Step S601, setting the vehicle refrigerator to remain on for X hours through the infotainment head unit (HU);

[0103] Step S602: After the user locks the vehicle and turns off the power, the VCU starts timing;

[0104] Step S603, determining whether there is a high voltage power-on demand, if yes, the photovoltaic generator does not intervene, otherwise the VCU enables the photovoltaic generator to continue to intervene;

[0105] Step S604: if there is a need to wake up the network, then wake up the network; otherwise, the network is dormant and only the car refrigerator works;

[0106] Step S605: If the VCU timing ends or the vehicle is powered on, the VCU wakes up the network and turns off the photovoltaic generator through a bus signal, otherwise, continue to execute step S603.

[0107] Current solar technology can generate about 100W of electricity per square meter, and the roof of a vehicle is about 1 square meter, so about 100W of electricity can be generated under sunlight.

[0108] The cooling / heating process of the car refrigerator consumes about 60W, and the average power for maintaining a stable temperature is about 20W. By adopting the vehicle low-voltage energy management method of the present invention, by cooperating with the non-network wake-up working mode, the refrigerator does not wake up the network segment when working, which can minimize the energy consumption outside the refrigerator, and photovoltaic power generation is sufficient to cover the energy consumption of the car refrigerator. In addition, the PN segment wake-up mode can also be used to minimize the energy consumption outside the refrigerator. Sometimes the refrigerator consumes battery power when it is cloudy for a short time, and photovoltaic power generation can charge the battery while supplying power to the refrigerator after sunny days. Keeping it turned on can avoid the extra energy consumption caused by the high-voltage process of battery feeding or intelligent power replenishment. At the same time, for users with a high usage rate of car refrigerators, it can greatly increase the life of the battery. It is reflected in the user end that is easy to perceive. After locking the car throughout the day in summer, the car refrigerator keeps cooling and no longer consumes power in the car.

[0109] like Figure 7 The flowchart of the vehicle low-voltage energy management method according to the best embodiment of the present invention when applied in the vehicle-leaving sentinel mode is shown, including:

[0110] Step S701, setting the vehicle-leaving sentry mode to remain for X hours through HU;

[0111] Step S702: After the user locks the vehicle and turns off the power, the VCU starts timing;

[0112] Step S703, determining whether there is a high voltage power-on demand, if yes, the photovoltaic generator does not intervene, otherwise the VCU enables the photovoltaic generator to continue to intervene;

[0113] Step S704: if there is a need to wake up other networks, then wake up the network; otherwise, perform PN segment network management;

[0114] Step S705: If the VCU timing ends or the vehicle is powered on, the VCU wakes up the network and turns off the photovoltaic generator through a bus signal.

[0115] For the power-saving version of the sentinel mode where the whole vehicle is powered off and high voltage is not available, although the low-voltage energy consumption of the sentinel mode can be minimized by using the PN segment wake-up strategy, even so, the battery will still need to be recharged every few hours, and the impact of long-term use on the battery life and the power consumption of the whole vehicle power battery will still be relatively obvious. By adopting the vehicle low-voltage energy management method of the present invention, photovoltaic power generation can greatly reduce the vehicle-side consumption of the sentinel mode. The energy consumption of the sentinel mode of different OEMs is different. For example, by adopting the power-saving strategy of the high-voltage PN segment, the energy consumption is roughly about 100W-200W. Photovoltaic cells can reduce power consumption by 50%-100%, and the intelligent recharge interval is also significantly reduced, and even no recharge is needed, which greatly reduces power consumption and increases battery life.

[0116] For other scenarios such as waiting for rescue and thermal runaway without high voltage, the vehicle low-voltage energy management method of the present invention also significantly increases the duration of the vehicle remaining powered on to varying degrees. The operation time of the water pump is increased in the thermal runaway scenario. Since thermal runaway fire incidents usually occur in the summer, with high temperatures, dryness and no rain, it is consistent with the scenario with the highest efficiency of photovoltaic power generation. Therefore, the power generation capacity of photovoltaic power generation can be maximized at this time, and the increase in the operation time of the water pump reduces the probability of fire, further ensuring user safety.

[0117] Based on the same inventive concept, Figure 8 FIG. 1 is a schematic diagram of a low-voltage energy management device for a vehicle according to an embodiment of the present invention, comprising:

[0118] A demand detection module 801 is used to detect whether the vehicle has a high voltage power-on demand;

[0119] The module 802 for not requiring high-voltage power-on is used to shut down the DC converter electrically connected to the power battery when there is no need for high-voltage power-on, and to control the photovoltaic generator to supply power to the low-voltage electrical appliances of the vehicle, wherein the DC converter, the photovoltaic generator and the storage battery are connected in parallel and electrically connected to the low-voltage electrical appliances of the vehicle;

[0120] The high voltage power-on demand module 803 is used to control the photovoltaic generator to stop supplying power to the low voltage electrical appliances when there is a high voltage power-on demand, and to start the DC converter to control the power battery to supply power to the low voltage electrical appliances through the DC converter.

[0121] The present invention detects the vehicle to ensure that only the power battery or the photovoltaic generator is supplying power at the same time. Since the photovoltaic generator, the DC converter and the storage battery are in parallel, when it is ensured that only the power battery or the photovoltaic generator is supplying power at the same time, it is avoided that when the power battery and the photovoltaic generator are supplying power at the same time, the photovoltaic generator needs to provide a higher voltage and damages the storage battery.

[0122] In one embodiment, controlling the photovoltaic generator to supply power to low-voltage electrical appliances of the vehicle includes: controlling the photovoltaic generator to use a voltage that is the same as an output voltage of the DC converter to supply power to the low-voltage electrical appliances of the vehicle.

[0123] In one embodiment, the device further comprises a setting module, which is used to:

[0124] Set the vehicle network to non-network wake-up working mode.

[0125] In one embodiment, the device further comprises a setting module for

[0126] The vehicle is set to a segment-based wake-up mode, in which multiple segments of the vehicle take turns to sleep or wake up.

[0127] In one embodiment, the detecting whether the vehicle has a high voltage power-on requirement includes:

[0128] When the vehicle is powered off, check whether the vehicle needs to be powered on with high voltage.

[0129] In one of the embodiments, the detecting whether the vehicle has a high voltage power-on requirement when the vehicle is powered off includes: when the vehicle is powered off, dormant network, and detecting whether the vehicle has a high voltage power-on requirement after starting the dormant timer;

[0130] The device also includes a wake-up module, which is used to wake up the network after the sleep timer ends, and control the photovoltaic generator to stop supplying power to the low-voltage electrical appliance, start the DC converter, and control the power battery to supply power to the low-voltage electrical appliance through the DC converter.

[0131] In one of the embodiments, the device further includes a power-on module, which is used to control the photovoltaic generator to stop supplying power to the low-voltage electrical appliances after the vehicle is powered on.

[0132] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0133] like Fig. 9 The figure shows a hardware structure diagram of an electronic device of the present invention, including:

[0134] at least one processor 901; and,

[0135] A memory 902 that is communicatively connected to at least one of the processors 901; wherein:

[0136] The memory 902 stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors so that the at least one processor can execute the vehicle low-voltage energy management method as described above.

[0137] Fig. 9 A processor 901 is taken as an example.

[0138] The electronic device may further include: an input device 903 and a display device 904 .

[0139] The processor 901, the memory 902, the input device 903 and the display device 904 may be connected via a bus or other means, and the figure takes the connection via a bus as an example.

[0140] The memory 902 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the vehicle low-voltage energy management method in the embodiment of the present application, for example, Figure 1 , Figure 2 The processor 901 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 902, that is, the vehicle low-voltage energy management method in the above embodiment is implemented.

[0141] The memory 902 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the vehicle low-voltage energy management method, etc. In addition, the memory 902 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 902 may optionally include a memory remotely arranged relative to the processor 901, and these remote memories may be connected to a device for executing the vehicle low-voltage energy management method via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0142] The input device 903 can receive user clicks and generate signal inputs related to user settings and function control of the vehicle low-voltage energy management method. The display device 904 can include display devices such as a display screen.

[0143] The one or more modules are stored in the memory 902 , and when executed by the one or more processors 901 , the vehicle low-voltage energy management method in any of the above method embodiments is executed.

[0144] The present invention detects the vehicle to ensure that only the power battery or the photovoltaic generator is supplying power at the same time. Since the photovoltaic generator, the DC converter and the storage battery are in parallel, when it is ensured that only the power battery or the photovoltaic generator is supplying power at the same time, it is avoided that when the power battery and the photovoltaic generator are supplying power at the same time, the photovoltaic generator needs to provide a higher voltage and damages the storage battery.

[0145] An embodiment of the present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the vehicle low-voltage energy management method as described above.

[0146] In the context of the present disclosure, a storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or apparatus. The storage medium may be a machine-readable signal medium or a machine-readable storage medium. Alternatively, the storage medium may be a non-temporary computer-readable storage medium, for example, a non-temporary computer-readable storage medium may be a ROM, a random access memory (Random Access Memory, RAM), a compact disc read-only memory (Compact Disc ROM, CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0147] An embodiment of the present invention provides a vehicle, including the vehicle low-voltage energy management device as described above, or the electronic device as described above. It is understandable that the vehicle may also include: a processor, a memory, and a computer program. The computer program is stored in the memory and is configured to be executed by the processor to implement the vehicle low-voltage energy management method provided by the embodiment of the present disclosure. The processor and the memory are already in Fig. 9 The parts described in the illustrated embodiment are not repeated here.

[0148] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A vehicle low-voltage energy management method, characterized in that: include: Detect whether the vehicle needs to be powered on with high voltage; When there is no high-voltage power-on demand, the DC converter electrically connected to the power battery is turned off, and the photovoltaic generator is controlled to supply power to the low-voltage electrical appliances of the vehicle, and the DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the low-voltage electrical appliances of the vehicle; When there is a need to power on high voltage, the photovoltaic generator is controlled to stop supplying power to the low voltage electrical appliance, and the DC converter is started to control the power battery to supply power to the low voltage electrical appliance through the DC converter.

2. The vehicle low-voltage energy management method according to claim 1, characterized in that: The method of controlling the photovoltaic generator to supply power to the low-voltage electrical appliances of the vehicle comprises: The photovoltaic generator is controlled to use a voltage that is the same as the output voltage of the DC converter to supply power to low-voltage electrical appliances of the vehicle.

3. The vehicle low-voltage energy management method according to claim 1, characterized in that: After supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises: Set the vehicle network to non-network wake-up working mode.

4. The vehicle low-voltage energy management method according to claim 1, characterized in that: After supplying power to the low-voltage electrical appliances of the vehicle, the method further comprises: The vehicle is set to a segment-based wake-up mode, in which multiple segments of the vehicle take turns to sleep or wake up.

5. The vehicle low-voltage energy management method according to claim 1, characterized in that: The detecting whether the vehicle has a high voltage power-on requirement includes: When the vehicle is powered off, check whether the vehicle needs to be powered on with high voltage.

6. The vehicle low-voltage energy management method according to claim 5, characterized in that: The detecting whether the vehicle has a high-voltage power-on requirement when the vehicle is powered off includes: when the vehicle is powered off, dormant network, and detecting whether the vehicle has a high-voltage power-on requirement after starting the dormant timer; The method further includes: after the sleep timer ends, waking up the network, controlling the photovoltaic generator to stop supplying power to the low-voltage electrical appliance, starting the DC converter, and controlling the power battery to supply power to the low-voltage electrical appliance through the DC converter.

7. The vehicle low-voltage energy management method according to claim 5, characterized in that: The method further comprises: After the vehicle is powered on, the photovoltaic generator is controlled to stop supplying power to the low-voltage electrical appliances.

8. A vehicle low-voltage energy management device, characterized in that: include: A demand detection module is used to detect whether the vehicle has a high voltage power-on demand; A module without high-voltage power-on demand is used to shut down the DC converter electrically connected to the power battery when there is no high-voltage power-on demand, and control the photovoltaic generator to supply power to the low-voltage electrical appliances of the vehicle. The DC converter, the photovoltaic generator and the battery are connected in parallel and electrically connected to the low-voltage electrical appliances of the vehicle; A high-voltage power-on demand module is used to control the photovoltaic generator to stop supplying power to the low-voltage electrical appliances when there is a high-voltage power-on demand, and to start the DC converter to control the power battery to supply power to the low-voltage electrical appliances through the DC converter.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to execute the vehicle low-voltage energy management method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute all steps of the vehicle low-voltage energy management method as described in any one of claims 1 to 7.

11. A vehicle, characterized in that: It includes the vehicle low-voltage energy management device as described in claim 8, or the electronic device as described in claim 9.

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