CN117162948A - Energy recovery method, power supply system and vehicle - Google Patents
Energy recovery method, power supply system and vehicle Download PDFInfo
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- CN117162948A CN117162948A CN202210575171.1A CN202210575171A CN117162948A CN 117162948 A CN117162948 A CN 117162948A CN 202210575171 A CN202210575171 A CN 202210575171A CN 117162948 A CN117162948 A CN 117162948A
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- 238000004134 energy conservation Methods 0.000 abstract description 7
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Abstract
The application provides an energy recovery method, a power supply system and a vehicle comprising the power supply system. The energy recovery method comprises the following steps: s100: judging whether the vehicle is in an energy recovery state, if not, executing step S300: judging whether the residual electric quantity of the low-voltage storage battery of the power supply system is larger than a residual electric quantity calibration value, if so, executing step S400: judging whether the accumulated electric quantity increment of the low-voltage storage battery is larger than a first electric quantity calibration value in the current driving cycle, if so, executing step S410: the voltage of the power supply system is reduced so that the low-voltage battery is discharged. According to the technical scheme of the application, the high-efficiency execution of energy recovery is realized, the power supply of the low-voltage storage battery to the whole vehicle electric appliance can be controlled, the timely release of recovered energy is realized, the energy consumption of a vehicle power source is reduced, and the energy conservation of the vehicle is improved, so that the energy utilization rate and the economic performance of the vehicle are improved.
Description
Technical Field
The application relates to the technical field of automobile energy conservation, in particular to an energy recovery method, and further relates to a power supply system and a vehicle comprising the same.
Background
Along with the continuous improvement of the requirements of oil saving and environmental protection, various energy saving technologies of automobiles are generated. The low-voltage power supply system of the vehicle provides power supply service for all low-voltage modules, sensors, motors and the like of the whole vehicle, is one of important energy consumption parts of the whole vehicle, and can bring important contribution to energy conservation of the whole vehicle by improving the energy efficiency of the low-voltage power supply system.
In the existing energy saving technology, a common scheme is vehicle deceleration energy recovery. The vehicle is driven by the vehicle inertia reverse-towing engine in a deceleration stage, the engine does not spray fuel, the voltage of the generator is rapidly increased to charge the storage battery, and the vehicle inertia energy can be recovered and stored in the storage battery to play a role in energy conservation. In a pure electric vehicle, the deceleration energy is recovered by a similar mechanism, and the vehicle inertia drags the high-voltage generator to generate power, and the voltage converter converts the high voltage into low voltage, so that the energy is stored in the storage battery.
At present, considering cost and low-temperature performance, lead-acid batteries are commonly used as low-voltage storage batteries of automobiles, and the lead-acid batteries easily cause polarization effect in the charging process so as to reduce the charge acceptance. In addition, the energy recovered is not utilized timely and effectively at present, so that the utilization rate of the energy of the whole vehicle and the energy-saving effect are required to be improved.
Disclosure of Invention
The present application aims to provide an energy recovery method, a power supply system and a vehicle comprising the power supply system, to solve or alleviate at least part of the problems mentioned in the background art.
To achieve one of the foregoing objects, according to one aspect of the present application, there is provided an energy recovery method comprising the steps of: s100: judging whether the vehicle is in an energy recovery state, if not, executing a step S300; s300: judging whether the residual electric quantity of the low-voltage storage battery of the power supply system is larger than a residual electric quantity calibration value, if so, executing step S400; s400: judging whether the accumulated electric quantity increment of the low-voltage storage battery is larger than a first electric quantity calibration value in the current driving cycle, if so, executing step S410; s410: the voltage of the power supply system is reduced so that the low-voltage battery is discharged.
In addition to, or as an alternative to, one or more of the above features, in a further embodiment, the step S100 comprises: judging whether the vehicle is in an energy recovery state, if so, executing step S200: and increasing the voltage of the power supply system to charge the low-voltage storage battery.
In addition to, or as an alternative to, one or more of the above features, in further embodiments, the step S400 includes: judging whether the accumulated electric quantity increment of the low-voltage storage battery is larger than a first electric quantity calibration value in the current driving cycle, if not, executing step S420: and adjusting the voltage of the power supply system based on the second electric quantity calibration value.
In addition to, or as an alternative to, one or more of the above features, in further embodiments, the S420 includes: judging whether the accumulated electric quantity increasing amount is larger than the second electric quantity calibration value in the current driving cycle, if so, executing step S421; if not, go to step S422; s421: according to the driving state of the vehicle, adjusting the current of the low-voltage storage battery; s422: and adjusting the voltage of the power supply system, and controlling the low-voltage storage battery to be in a current balance state.
In addition to, or as an alternative to, one or more of the above features, in further embodiments, the step S421 includes: judging whether the vehicle is in a motion driving state with frequent energy output or input change currently, if so, executing step S4211, and if not, executing step S422; s4211: the voltage of the power supply system is reduced such that the low voltage battery discharges at a current within a set range.
In addition to or as an alternative to one or more of the above features, in a further embodiment, the current of the low voltage battery is 0 amps in the current balance state; the setting range is 0 to 10 amps.
In order to achieve one of the foregoing objects, according to another aspect of the present application, there is provided a power supply system for performing the energy recovery method as described in the foregoing aspects, the power supply system including a controller, a sensing module, and a low-voltage battery;
the sensing module is in communication connection with the controller, detects a vehicle state, transmits a vehicle state signal to the controller, is also connected with the low-voltage storage battery, monitors the current of the low-voltage storage battery, and transmits a current signal to the controller;
the controller calculates the remaining capacity of the low-voltage storage battery and the accumulated capacity increment based on the current signal, and sends out a control signal to adjust the voltage of the power supply system.
In addition to, or as an alternative to, one or more of the above features, in a further embodiment the power supply system further comprises a safety device connected to the low voltage battery.
In order to achieve one of the foregoing objects, the present application also provides a vehicle including a power source electrically connected to the power supply system, a converter driven by the power source and outputting electric power to the power supply system, and the power supply system as described in the foregoing aspects, the converter regulating a voltage of the power supply system based on the control signal issued by the controller.
In addition to, or as an alternative to, one or more of the above features, in a further embodiment the vehicle further comprises an electrical appliance, the low voltage battery being electrically connected to the electrical appliance, the amount of power released by the low voltage battery powering the electrical appliance.
According to the energy recovery method, the power supply system and the vehicle comprising the power supply system, the energy can be accurately and timely recovered, the efficient execution of the energy recovery is realized, the power supply of the low-voltage storage battery to the whole vehicle electric appliance can be controlled, the timely release of the recovered energy is realized, the energy consumption of a vehicle power source is reduced, and the energy conservation of the vehicle is improved, so that the energy utilization rate and the economic performance of the vehicle are improved.
Drawings
The present disclosure will be more readily understood with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the application. In the figure:
FIG. 1 shows a flow chart of a method of energy recovery according to one embodiment of the application;
FIG. 2 illustrates a schematic diagram of a power supply system of a conventional fuel-fired vehicle according to one embodiment of the present application;
fig. 3 shows a schematic diagram of a power supply system of an electric vehicle according to an embodiment of the present application.
Detailed Description
The application will be described in detail hereinafter with reference to exemplary embodiments in the accompanying drawings. It should be understood, however, that this application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the application to those skilled in the art.
Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, it is easy for a person skilled in the art to proceed with appropriate combination or deletion between these technical features (or equivalents thereof), thereby obtaining still further embodiments of the application that may not be directly mentioned herein, without departing from the technical scope of the application.
Fig. 1 shows a flow chart of a method of energy recovery according to an embodiment of the application. As shown, the method includes the steps of:
s100: after the vehicle is started, judging whether the vehicle is in an energy recovery state, if so, executing step S200, and if not, executing step 300; the vehicle is in an energy recovery state, namely the vehicle accords with the state of running but does not output energy, for example, for a fuel oil vehicle, the vehicle can be decelerated, braked or coasted without consuming fuel oil, at the moment, the voltage of the generator is rapidly increased to charge the low-voltage storage battery, the inertial energy of the vehicle can be recovered and stored in the storage battery, the energy-saving effect is achieved, and meanwhile, a certain auxiliary braking torque force is provided for the deceleration process due to the increase of the load of the generator in the energy recovery process; or in a state that the electric vehicle can be decelerated, braked or coasted without consuming the electric quantity of the high-voltage battery, the high-voltage generator is driven by the vehicle to generate electricity by the inertia of the vehicle, the high voltage is converted into low voltage by the voltage converter (DCDC), and the energy is stored in the low-voltage battery.
S200: the voltage of the power supply system 10 is increased to charge the low-voltage storage battery 11, thereby realizing energy recovery;
s300: judging whether the residual electric quantity SOC of the low-voltage storage battery 11 is larger than the residual electric quantity calibration value SOC1, if so, namely, the electric quantity of the low-voltage storage battery 11 is sufficient, executing step S400; if not, that is, the low-voltage battery 11 has insufficient electric quantity, step S500 is executed to supplement the electric quantity;
s400: judging whether the accumulated electric quantity increment AH of the low-voltage storage battery 11 is greater than the first electric quantity calibration value AH1 in the current driving cycle, if yes, the accumulated electric quantity increment is sufficient, and the accumulated electric quantity increment AH can be used for supplying power, and executing step S410; if not, go to step S420;
s410: the voltage of the power supply system 10 is reduced, so that the low-voltage storage battery 11 discharges, and the discharged electric quantity can be used for an electric appliance 13 in a vehicle, thereby realizing the utilization of recovered energy, reducing the energy consumption of a vehicle power source, for example, for a fuel vehicle, reducing the fuel consumption and realizing the fuel saving and economy of the whole vehicle; for the new energy vehicle, the electric quantity consumption of the high-voltage battery is reduced, and the endurance mileage is prolonged;
s420: adjusting the voltage of the power supply system 10 based on the second electric quantity calibration value AH 2;
s500: the power supply system 10 voltage is maintained at a standard voltage. The standard voltage is the voltage at which the power supply system 10 charges the low-voltage storage battery 11 slowly in a normal state.
Under the arrangement, the energy recovery method can accurately judge the time of energy recovery, realize the efficient execution of energy recovery, control the low-voltage storage battery to supply power to the whole vehicle electric appliance, realize the timely release of recovered energy, reduce the energy consumption of a vehicle power source, and improve the energy conservation of the vehicle, thereby improving the energy utilization rate and the economic performance of the vehicle.
Further implementations or refinements, improvements to the energy recovery method will be described below by way of exemplary illustration in order to further improve its operational efficiency, reliability or other improvements.
In the embodiment shown in fig. 1, step S420 specifically includes: judging whether the accumulated electric quantity increment AH is larger than a second electric quantity calibration value AH2 in the current driving cycle, if so, executing step S421; if not, go to step S422;
s421: adjusting the current of the low-voltage battery 11 according to the driving state of the vehicle;
s422: the voltage of the power supply system 10 is regulated to control the low-voltage battery 11 to be in a current balance state. The current balance state, i.e., the state in which the battery is not substantially charged and discharged, is set to about 0 ampere in the low-voltage battery 11.
More specifically, in the illustrated embodiment, the step S421 includes: judging whether the vehicle is in a motion driving state with frequent energy output or input change currently, if so, executing step S4211, if not, executing step S422, namely, when the vehicle is in a comfortable or normal driving state, adjusting the voltage of the power supply system 10, and controlling the low-voltage storage battery 11 to be in a current balance state, namely, controlling the low-voltage storage battery 11 not to be basically charged or discharged;
s4211: the voltage of the power supply system 10 is reduced, so that the low-voltage storage battery 11 discharges with a current within a set range, which may be 0 to 10 a, that is, when the vehicle is in a running driving state, the energy recovery is frequent, and the polarization effect of the low-voltage storage battery 11 can be eliminated by controlling the low-voltage storage battery 11 to discharge with a small current, and the charge receiving capacity is improved by utilizing the capacitance effect between the plates inside the storage battery, thereby improving the energy recovery capacity of the vehicle and improving the energy saving effect of the vehicle.
According to the energy recovery method, the timely utilization of the recovered energy is realized by controlling the discharge of the low-voltage storage battery, the energy saving performance of the whole vehicle is improved, the polarization effect of the low-voltage storage battery is eliminated by the small-current discharge in the movement driving state, and the energy recovery capacity of the low-voltage storage battery is improved. The method can be suitable for various power assembly types, including pure electric power, hybrid power, fuel engine power and the like.
Fig. 2 shows a schematic view of a power supply system 10 of a conventional fuel vehicle according to an embodiment of the present application. Fig. 3 shows a schematic view of a power supply system 10 of an electric vehicle according to an embodiment of the application. The power supply system 10 includes a controller 12, a sensing module, and a low voltage battery 11. The sensing module is communicatively coupled to the controller 12, and the sensing module detects a vehicle condition, which may be used to determine whether the vehicle is in an energy recovery state in step S100, and to determine a driving state of the vehicle in step S421, and to transmit a vehicle condition signal to the controller 12. As shown in fig. 2 or 3, the sensing module includes a sensor 14, and the sensor 14 is connected with the low-voltage battery 11 and monitors the current of the low-voltage battery 11 and transmits a current signal to the controller 12. The controller 12 calculates the remaining charge amount SOC of the voltage battery of the low-voltage battery 11 and the accumulated charge amount increase amount AH based on the current signal, and issues a control signal to adjust the voltage of the power supply system 10. In other embodiments, the sensor 14 may be a voltage-monitoring sensor, and the current information may be obtained by converting between voltage and resistance.
As shown in fig. 2 and 3, the vehicle may include a power source 20 and a converter 30 connected to the power source 20, and in the conventional fuel vehicle shown in fig. 2, the power source 20 is an engine, the converter 30 is a generator, and the generator is electrically connected to the power supply system 10 and converts power of the engine into electric energy to be transmitted to the power supply system 10. The generator receives a control signal from the controller 12 and thereby adjusts the voltage of the power supply system 10, controls the current of the low-voltage battery 11, and the like. Similarly, in the electric vehicle shown in fig. 3, the power source 20 is a high-voltage battery, and the converter 30 is a voltage converter (DCDC) electrically connected to the power supply system 10 for converting the high voltage of the high-voltage battery into the low voltage of the power supply system 10. The voltage converter receives a control signal from the controller 12 and thereby adjusts the voltage of the power supply system 10, controls the current of the low-voltage battery 11, and the like.
In addition, the vehicle further comprises an electric appliance 13, the electric appliance 13 is electrically connected with the low-voltage storage battery 11, and the electric quantity released by the low-voltage storage battery 11 can supply power for the electric appliance 13, so that the energy recovered by the low-voltage storage battery 11 is effectively utilized, the energy consumption of the vehicle power source 20 is reduced, the energy utilization rate of the vehicle is improved, and the energy conservation and economy of the vehicle are optimized.
In addition, as illustrated, a safety device 15 may also be connected to the low voltage battery 11 to ensure the safety of the power supply system 10.
It should be appreciated that although two vehicle types are illustrated herein by way of example only in fig. 2 and 3, including a power system according to one embodiment of the present application, the power system of the present application may be adapted to various powertrain type vehicles, including electric-only, hybrid, and fuel-engine powered vehicles.
With the arrangement, the power supply system and the vehicle comprising the power supply system effectively improve the energy recovery capacity and the energy utilization rate, reduce the energy consumption of the whole vehicle and improve the economy of the whole vehicle.
The above examples mainly illustrate the energy recovery method, the power supply system, and the vehicle including the power supply system of the present application. Although only a few embodiments of the present application have been described, those skilled in the art will appreciate that the present application can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the illustrated examples and embodiments are to be considered as illustrative and not restrictive, and the application is intended to cover various modifications and substitutions without departing from the spirit and scope of the technical solutions of the application.
Claims (10)
1. An energy recovery method, characterized in that the energy recovery method comprises the steps of:
s100: judging whether the vehicle is in an energy recovery state, if not, executing a step S300;
s300: judging whether the residual capacity (SOC) of the low-voltage storage battery (11) of the power supply system (10) is greater than a residual capacity calibration value (SOC 1), if so, executing step S400;
s400: judging whether the accumulated electric quantity increment (AH) of the low-voltage storage battery (11) is larger than a first electric quantity calibration value (AH 1) in the current driving cycle, if so, executing step S410;
s410: the voltage of the power supply system (10) is reduced, so that the low-voltage battery (11) is discharged.
2. The energy recovery method according to claim 1, characterized in that said step S100 comprises: judging whether the vehicle is in an energy recovery state, if so, executing step S200: the voltage of the power supply system (10) is increased to charge the low-voltage battery (11).
3. The energy recovery method according to claim 1, characterized in that said step S400 comprises: judging whether the accumulated electric quantity increment (AH) of the low-voltage storage battery (11) is larger than a first electric quantity calibration value (AH 1) in the current driving cycle, if not, executing step S420: based on a second charge calibration value (AH 2), the voltage of the power supply system (10) is adjusted.
4. The energy recovery method according to claim 3, wherein said S420 comprises: determining whether the accumulated charge amount increase (AH) is greater than the second charge amount calibration value (AH 2) during the current driving cycle, if so, executing step S421; if not, go to step S422;
s421: adjusting the current of the low-voltage battery (11) according to the driving state of the vehicle;
s422: and adjusting the voltage of the power supply system (10) and controlling the low-voltage storage battery (11) to be in a current balance state.
5. The energy recovery method according to claim 4, characterized in that said step S421 includes: judging whether the vehicle is in a motion driving state with frequent energy output or input change currently, if so, executing step S4211, and if not, executing step S422;
s4211: the voltage of the power supply system (10) is reduced such that the low-voltage battery (11) discharges at a current within a set range.
6. The energy recovery method according to claim 5, characterized in that the current of the low-voltage battery (11) in the current balance state is 0 a; the setting range is 0 to 10 amps.
7. A power supply system for performing the energy recovery method according to any one of claims 1 to 6, characterized in that the power supply system (10) comprises a controller (12), a sensing module and a low voltage battery (11);
the sensing module is in communication connection with the controller (12), detects a vehicle state and transmits a vehicle state signal to the controller (12), is also connected with the low-voltage storage battery (11) and monitors the current of the low-voltage storage battery (11), and transmits a current signal to the controller (12);
the controller (12) calculates the remaining capacity (SOC) and the accumulated capacity increase (AH) of the low-voltage storage battery (11) based on the current signal, and issues a control signal to adjust the voltage of the power supply system (10).
8. The power supply system according to claim 7, characterized in that it further comprises a safety device (15) connected to the low-voltage battery.
9. A vehicle, characterized in that the vehicle comprises a power source (20), a converter (30) in power connection with the power source (20), and a power supply system (10) according to claim 7 or 8, the converter (30) being electrically connected with the power supply system (10), the converter (30) being driven by the power source (20) and outputting electric energy to the power supply system, the converter (30) regulating the voltage of the power supply system (10) based on the control signal issued by the controller (12).
10. The vehicle according to claim 9, characterized in that it further comprises an electric appliance (13), said low-voltage battery (11) being electrically connected to said electric appliance (13), the electric quantity discharged by said low-voltage battery (11) powering said electric appliance (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575171.1A CN117162948A (en) | 2022-05-25 | 2022-05-25 | Energy recovery method, power supply system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575171.1A CN117162948A (en) | 2022-05-25 | 2022-05-25 | Energy recovery method, power supply system and vehicle |
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| CN117162948A true CN117162948A (en) | 2023-12-05 |
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| CN202210575171.1A Pending CN117162948A (en) | 2022-05-25 | 2022-05-25 | Energy recovery method, power supply system and vehicle |
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