CN111332297B - Automobile starting system and method based on intelligent management of low-voltage storage battery - Google Patents
Automobile starting system and method based on intelligent management of low-voltage storage battery Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
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Abstract
The invention discloses an automobile starting system and method based on intelligent management of a low-voltage storage battery, which comprises the storage battery, an IBS sensor, an engine control system, a whole vehicle controller and a DC/DC converter, wherein the IBS sensor is used for monitoring battery state information of the storage battery and voltage drop value information in the process of starting an engine by a 12V starter in real time; the engine control system is used for receiving the battery state information and the voltage drop value information and feeding back the battery state information and the voltage drop value information to the vehicle control unit; the vehicle control unit is used for adjusting the charging power/voltage of the DC/DC converter to the storage battery in real time and controlling the SOC of the storage battery to meet a preset SOC threshold value. The invention can ensure the SOC of the storage battery and the starting capability of the 12V starter for starting the engine after the load of the whole vehicle is in dynamic change and the long-term service performance of the storage battery is attenuated.
Description
Technical Field
The invention relates to the technical field of vehicle management, in particular to an automobile starting system and method based on intelligent management of a low-voltage storage battery.
Background
With the rapid development of new energy automobiles, people have more and more extensive demands on hybrid electric vehicles. The hybrid electric vehicle has a pure electric running mode, a hybrid running mode and a pure generator running mode, and switching between the running modes involves starting and stopping of an engine. The mode of controlling the engine start of the hybrid electric vehicle can be divided into a motor dragging mode, a driving inertia dragging mode and a starter starting mode. When the hybrid electric vehicle controls the engine vehicle to have a high-pressure system fault, the hybrid electric vehicle is switched to a pure engine running mode, and the engine is started by utilizing a starter starting mode.
The starter can convert the electric energy of the storage battery into mechanical energy to drive the flywheel of the engine to rotate so as to start the engine. For a hybrid vehicle model with a mode of starting an engine by a 12V starter of the engine, different from a fuel vehicle with a traditional engine start-stop mode, the hybrid vehicle model can start the engine by the 12V starter in a dynamic driving process, so that whether the state of a storage battery is enough to support the 12V start is determined before starting the engine, otherwise, the failure of starting the engine by the 12V starter in the driving process can be caused, and further, safety accidents can be caused.
Disclosure of Invention
In order to solve the technical problems, the invention aims at solving the problems that the 12V starting capability of the storage battery is generally judged according to the terminal voltage of the storage battery acquired by a controller such as an engine control system, a whole vehicle controller and the like in the existing market technical scheme, and the charging voltage of the storage battery cannot be timely corrected according to information and the 12V starting capability cannot be accurately judged when the load of the whole vehicle is in a dynamic change process or the performance of the storage battery is attenuated after long-term use.
The invention provides an automobile starting system based on intelligent management of a low-voltage storage battery, which comprises the storage battery, an IBS sensor, an engine control system, a vehicle control unit and a DC/DC converter, wherein the IBS sensor is arranged at the negative pole of the storage battery, the IBS sensor is connected with the engine control system, the engine control system is connected with the vehicle control unit, the vehicle control unit is connected with the DC/DC converter through CAN communication, and the DC/DC converter is connected with the storage battery;
the IBS sensor is used for monitoring battery state information of the storage battery and voltage drop value information in the process of starting the engine by the 12V starter in real time;
the engine control system is used for receiving the battery state information and the voltage drop value information and feeding back the battery state information and the voltage drop value information to the vehicle control unit;
the vehicle control unit is used for adjusting the charging power/voltage of the DC/DC converter to the storage battery in real time and controlling the SOC of the storage battery to meet a preset SOC threshold value.
Further, the battery state information includes at least one selected from the group consisting of: SOC, SOH, SOF, voltage, current, and temperature information.
Furthermore, the starting system also comprises a voltage correction module, and the voltage correction module is used for correcting the charging power/voltage of the storage battery in the life cycle of the whole vehicle when the storage battery is aged or decayed.
Further, the starting system further comprises a starting judgment module, and the starting judgment module is used for judging whether the 12V starter can start the engine or not when the IBS sensor has a fault or abnormal communication.
Further, the starting system further comprises an early warning module, and the early warning module is used for prompting a user through instrument characters, sound or an early warning lamp when the storage battery is deeply discharged or seriously damaged.
Further, the starting system further comprises a DC/DC converter fault processing module, and the DC/DC converter fault processing module is used for limiting the vehicle speed of the vehicle in a stepped mode according to a preset scheme when the DC/DC converter is in fault.
The invention provides an automobile starting method based on intelligent management of a low-voltage storage battery, which is applied to the starting system and comprises the following steps:
monitoring battery state information of the storage battery and voltage drop value information in the process of starting an engine by a 12V starter in real time;
sending the battery state information and the voltage drop value information to the vehicle control unit;
and the vehicle control unit adjusts the charging power/voltage of the DC/DC converter to the storage battery in real time according to the battery state information and the voltage drop value information, and controls the SOC value of the storage battery to meet a preset SOC threshold value.
Further, the starting method also comprises the step of correcting the charging power/voltage of the storage battery in the life cycle of the whole vehicle according to the SOH when the storage battery is aged or decayed.
Further, the starting method further comprises the step of judging whether the 12V starter can start the engine or not according to the voltage of the low-voltage end of the DC/DC converter, the power supply voltage of the whole vehicle controller and the static end voltage of the storage battery collected by the engine control system when the IBS sensor has a fault or abnormal communication.
Further, the starting method further comprises the following steps:
when the storage battery is deeply discharged or seriously damaged, prompting a user through instrument characters, sound or an early warning lamp;
when the DC/DC converter fails, the vehicle speed of the vehicle is limited in a stepped manner according to a preset scheme.
The embodiment of the invention has the following beneficial effects:
(1) according to the invention, an intelligent IBS sensor of the storage battery is added, and information such as SOC, SOH, SOF, voltage, current, temperature, voltage drop value in the process of starting an engine by a 12V starter and the like of the storage battery is monitored in real time, so that a vehicle control unit can acquire related information of the storage battery in real time, and the additional LIN interface reservation of the hardware of the vehicle control unit is avoided;
(2) the vehicle controller adjusts the charging voltage of the DC/DC converter to the storage battery in real time according to the monitoring information of the IBS sensor, always maintains the low-voltage storage battery at the optimal SOC, avoids overcharge and overdischarge of the storage battery, reduces the energy waste of the DC/DC converter on a hybrid vehicle model for supplementing electricity to the low-voltage storage battery, improves the economy of the whole vehicle, and can save the comprehensive oil consumption by 1.5-2% under the full working condition of a real vehicle test;
(3) according to the SOC and the SOF of the storage battery, which are monitored in real time, and the voltage, the current, the temperature, the voltage drop value in the process of starting the engine by the 12V starter and other information, the vehicle controller comprehensively judges whether the low-voltage storage battery is enough to support the 12V starter to start the engine or not, and avoids the safety risk caused by the failure of starting the engine by the 12V starter in the dynamic driving process.
Drawings
In order to more clearly illustrate the method and apparatus for displaying the power of the mobile terminal by the vehicle meter according to the present invention, the drawings required for the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an automobile starting system based on intelligent management of a low-voltage battery according to an embodiment of the present invention;
fig. 2 is a flowchart of an automobile starting method based on intelligent management of a low-voltage battery according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the IBS sensor supports precise current, voltage and temperature measurement, and the integrated LIN 2.1 and LIN2.0 interfaces communicate, and are mainly used for vehicle battery current/voltage/temperature monitoring, battery state of charge monitoring and battery health monitoring, and hybrid vehicles.
The SOC (state of charge) is an important parameter of the battery management system, is the most important reference for planning the route for using the battery, and is also the basis for power management in battery management, and indicates that the battery is completely discharged when the SOC is 0 and fully charged when the SOC is 1.
The state of health (soh) of a battery is the ratio of a performance parameter to a nominal parameter after the battery has been used for a period of time, and represents the decay state of the battery.
The state of function (sof) of the battery is the collection of SOC and SOH, representing the discharge capacity of the battery.
The Open Circuit Voltage (OCV) reflects the stable electromotive force of the battery in a certain SOC state, corresponds to the SOC one by one, and can be used as the basis for SOC static calibration. When the battery is fully static, the terminal voltage is considered to be equal to OCV, and the current SOC of the battery can be obtained by looking up the table by using the SOC-OCV obtained in advance. The accuracy of the SOC-OCV curve directly affects the estimation accuracy of the battery SOC.
DC (direct current), DC-DC means converting a fixed DC voltage into a variable DC voltage, in which DC is converted into ac through an inverter, and then is stepped up or down through a transformer, and then rectified into DC. The technology is widely applied to the stepless speed change and control of the trolley bus, the subway train and the electric vehicle, and simultaneously, the control obtains the performance of stable acceleration and quick response and the effect of saving electric energy. The direct current chopper is used for replacing a rheostat, so that the electric energy can be saved by 20-30 percent. The direct current chopper not only can play a role in voltage regulation (switching power supply), but also can play a role in effectively suppressing harmonic current noise on the side of a power grid.
And (3) testing the electric balance of the whole vehicle: the electric balance of the whole vehicle refers to the balance relation between the power supply and the consumption of the power supply system of the whole vehicle, namely the dynamic balance of the electric energy generated by the generator, the storage battery and other various electric devices. The electric balance test method calibrates the lowest starting voltage and electric quantity, changes the SOC value of the storage battery by continuously charging and discharging the storage battery, and judges whether the storage battery can start the vehicle. The lowest starting voltage is determined by the power assembly and the starting storage battery of each vehicle type, and multiple calibration tests are required.
Examples
As shown in fig. 1, the present invention provides an automobile starting system based on intelligent management of a low-voltage battery, including a battery, a DC/DC converter, an IBS sensor, an engine control system and a vehicle controller, wherein the IBS sensor is disposed at a negative electrode of the battery, the IBS sensor is connected to the engine control system, the engine control system is connected to the vehicle controller, the vehicle controller is connected to the DC/DC converter through CAN communication, and the DC/DC converter is connected to the battery.
The IBS sensor is used for monitoring the battery state information of the storage battery and the voltage drop value information of the 12V starter in the process of starting the engine in real time. Specifically, the IBS sensor is mounted on the negative electrode of the storage battery and is communicated with an engine control system through LIN. In the embodiment of the invention, the IBS sensor is used for acquiring at least one battery state information of SOC, SOH, SOF, voltage, current, temperature and the like of the storage battery in real time and is also used for acquiring voltage drop value information in the process of starting an engine by using a 12V starter.
And the engine control system is used for receiving the battery state information and the voltage drop value information and feeding back the battery state information and the voltage drop value information to the vehicle control unit. Specifically, the engine control system communicates with the vehicle control unit through a CAN and sends information acquired by the IBS sensor to the vehicle control unit.
The vehicle control unit is used for adjusting the charging power/voltage of the DC/DC converter to the storage battery in real time and controlling the SOC of the storage battery to meet a preset SOC threshold value.
Specifically, in the embodiment of the invention, the optimal SOC values of the storage battery at different temperatures are obtained through a whole vehicle electrical balance test, for example, in the patent, the optimal SOC value of the storage battery at different temperatures is 80%, that is, when the SOC of the storage battery is 80%, the generation and consumption of electric energy among the generator, the storage battery and other various electric devices are dynamically balanced, and the whole vehicle has the best dynamic performance; the simultaneous test results show that the terminal voltage (OCV) of the storage battery under different environmental temperatures and SOC conditions is shown in table 1 below:
TABLE 1
And the vehicle control unit adjusts the output power/voltage value of the DC/DC converter in real time according to the acquired battery state information, the SOC value and the OCV of the storage battery so as to control the storage battery to be always at the optimal SOC value. When the SOC of the storage battery is greater than 80%, the output voltage of the DC/DC converter is reduced, and the storage battery is prevented from being overcharged; when the SOC of the storage battery is less than 80%, the output voltage of the DC/DC converter is increased, the storage battery is prevented from being over-discharged, the storage battery is rapidly charged, and the starting capability is improved. Taking the above table as reference, under different temperatures and different SOC values of the storage battery, the output voltage of the DC/DC converter is set according to the vehicle operating condition and whether the SOC of the storage battery is at the optimum SOC value, in the embodiment of the present invention, the set value of the output voltage of the DC/DC converter may refer to the following table 2: (the abscissa is battery SOC, the ordinate is temperature, and the intermediate voltage set value can be obtained by linear interpolation).
TABLE 2
Specifically, the vehicle control unit is further configured to control the SOC of the storage battery to meet a preset SOC threshold, where the preset SOC threshold is a storage battery SOC safety threshold for starting the engine by using the 12V starter of the entire vehicle determined according to the entire vehicle cold start test at different temperatures and different storage battery SOCs, so as to avoid a safety risk of failure of starting the engine by using the 12V starter caused by incapability of determining the starting capability of the storage battery. The experimentally determined SOC safety threshold for this battery 12V starter is shown in table 3 below:
TABLE 3
Y in the table represents that the current SOC value of the storage battery is enough to support a 12V starter to smoothly start the engine; n represents that the current SOC of the storage battery is not enough to support the 12V starter to smoothly start the engine, and the risk of starting failure exists.
When the SOC of the storage battery is out of the SOC safety threshold, the vehicle control unit comprehensively judges that the engine is started in other modes in advance (such as starting the engine by a large motor) and does not stop; and controlling the engine to enter a normal start-stop working condition by the vehicle control unit until the storage battery is charged until the SOC value is within the SOC safety threshold.
Specifically, the starting system further comprises a voltage correction module, and the voltage correction module is used for correcting the charging power/voltage of the storage battery within the life cycle of the whole vehicle when the storage battery is aged or decayed. In the embodiment of the invention, the voltage correction module corrects the charging voltage of the storage battery according to the collected SOH of the storage battery, and if the charging voltage is attenuated by 10%, the set value of the charging voltage is increased by 0.3V.
Specifically, the starting system further comprises a starting judgment module, and the starting judgment module is used for judging whether the 12V starter can start the engine or not when the IBS sensor has a fault or abnormal communication. In the embodiment of the invention, when the IBS sensor has a fault or abnormal communication, the starting judgment module allows 12V starting according to the condition that the minimum value of the voltage of the low-voltage end of the DC/DC converter, the power supply voltage of the whole vehicle controller and the static end voltage of the storage battery collected by the engine control system is more than 10V; otherwise, the 12V start is deemed insufficient.
Specifically, the starting system further comprises an early warning module, and the early warning module is used for prompting a user through instrument characters, sound or an early warning lamp when the storage battery is deeply discharged or seriously damaged. Specifically, when the storage battery is deeply discharged or seriously damaged, the storage battery cannot be effectively charged for a long time, so that the potential safety hazard of the power supply of the whole vehicle is brought; the vehicle control unit can judge the state of the storage battery according to the current charging voltage value of the storage battery and the actual SOC change value of the storage battery within a period of time, and if the state is abnormal, the vehicle control unit prompts a user through the early warning module. For example, the SOC value of the storage battery is lower than 20%, the DC/DC converter is normally activated, the low-voltage side charging voltage is 14.5V, and the SOC value of the storage battery is always lower than 3% (which can be set) in a certain period of time, which indicates that the storage battery is not charged and discharged all the time, and is probably the cause of the storage battery damage, and at this time, a user needs to be prompted, for example, if the electric quantity of the storage battery is insufficient, the storage battery needs to be timely recharged or checked. So as to avoid the problem of groveling caused by the fact that the vehicle cannot normally supply power as early as possible.
Specifically, the starting system further comprises a DC/DC converter fault processing module, and the DC/DC converter fault processing module is used for limiting the vehicle speed of the vehicle in a stepped mode according to a preset scheme when the DC/DC converter is in fault. Specifically, when the hybrid vehicle DC/DC converter fails, cannot be normally activated to work, cannot normally output power/voltage to supplement power to the storage battery or supply power to the entire vehicle, the entire vehicle controller sends a fault indication to the instrument, the vehicle can only supply power to the entire vehicle according to the storage battery at the moment, the electric quantity of the storage battery is quickly exhausted, and after-sales maintenance should be contacted as soon as possible or maintenance in a maintenance shop should be reached as soon as possible. The vehicle control unit can further limit the maximum vehicle speed of the vehicle in a stepped manner according to the SOC of the storage battery: on one hand, a user can conveniently and quickly find a nearby maintenance point without towing a vehicle, and on the other hand, safety accidents caused by sudden power failure of the whole vehicle in the process of high-speed driving are avoided as much as possible. In the embodiment of the present invention, the preset scheme is: and step limiting the maximum vehicle speed of the vehicle according to the SOC of the storage battery, namely the residual capacity of the storage battery. The maximum vehicle speed limit corresponding to the current battery SOC of the specific vehicle refers to the following table 4:
TABLE 4
The principle of step limitation on the vehicle speed is that when the residual electric quantity of the storage battery of the DC/DC converter is higher, the risk of sudden power failure of the whole vehicle is lower, the allowable safe driving vehicle speed is higher, the risk of sudden power failure of the whole vehicle is higher when the electric quantity of the storage battery is lower, and the allowable safe driving vehicle speed is lower. The safety accident caused by sudden power failure of the whole vehicle during high-speed driving is avoided, and meanwhile, the vehicle cannot directly lie prone when the DC/DC converter breaks down, can still safely drive for a distance, and is convenient to maintain.
Specifically, the starting system further comprises an emergency braking indication module, and the emergency braking indication module is electrically connected with the DC/DC converter. In some embodiments, the emergency braking indication module is an emergency braking indicator light. With the further improvement of the braking performance of most small passenger cars, the probability of the occurrence of the rear-end collision is increased. The reaction time of the emergency braking of the front vehicle left for the rear vehicle is very short, which easily causes the occurrence of the chain rear-end collision accident, at the moment, if the front vehicle can utilize the acousto-optic signal to timely give a warning signal to a driver of the rear vehicle, the rear vehicle can possibly make braking or evasion measures in advance, and therefore, the emergency braking indicator lamp is used for reminding the rear vehicle by lighting the lamp when the vehicle is in emergency braking.
Example 2
The invention provides an automobile starting method based on intelligent management of a low-voltage storage battery, which is applied to the starting system and comprises the following steps as shown in figure 2:
s01, monitoring the battery state information of the storage battery and the voltage drop value information in the process of starting the engine by the 12V starter in real time;
s03, sending the battery state information and the voltage drop value information to the vehicle control unit;
and S05, the vehicle control unit adjusts the charging power/voltage of the DC/DC converter to the storage battery in real time according to the battery state information and the voltage drop value information, and controls the SOC of the storage battery to meet a preset SOC threshold value.
Specifically, in the embodiment of the invention, the vehicle control unit dynamically adjusts the charging power/voltage of the DC/DC converter to the storage battery so as to keep the storage battery at the optimal SOC value, and meanwhile, the storage battery is kept enough to support the 12V starter to start the engine.
Specifically, the starting method further comprises the step of correcting the charging power/voltage of the storage battery in the life cycle of the whole vehicle according to the SOH when the storage battery is aged or decayed through a voltage correction module.
Specifically, the starting method further comprises the step of judging whether the 12V starter can start the engine according to the voltage of the low-voltage end of the DC/DC converter, the power supply voltage of the whole vehicle controller and the static end voltage of the storage battery collected by the engine control system when the IBS sensor has a fault or abnormal communication.
Specifically, the starting method further includes:
when the storage battery is deeply discharged or seriously damaged, prompting a user through instrument characters, voice or an early warning lamp, and avoiding the problem of groveling caused by the fact that the vehicle cannot normally supply power;
when the DC/DC converter fails, the vehicle speed is subjected to step limitation according to a preset scheme, so that a user can quickly find a nearby maintenance point without towing.
According to the invention, an intelligent IBS sensor of the storage battery is added, and information such as SOC, SOH, SOF, voltage, current, temperature, voltage drop value in the process of starting an engine by a 12V starter and the like of the storage battery is monitored in real time, so that a vehicle control unit can acquire related information of the storage battery in real time, and the additional LIN interface reservation of the hardware of the vehicle control unit is avoided; the vehicle controller adjusts the charging voltage of the DC/DC converter to the storage battery in real time according to the monitoring information of the IBS sensor, always maintains the low-voltage storage battery at the optimal SOC, avoids overcharge and overdischarge of the storage battery, reduces the energy waste of the DC/DC converter on a hybrid vehicle model for supplementing electricity to the low-voltage storage battery, improves the economy of the whole vehicle, and can save the comprehensive oil consumption by 1.5-2% under the full working condition of a real vehicle test; according to the SOC and the SOF of the storage battery, which are monitored in real time, and the voltage, the current, the temperature, the voltage drop value in the process of starting the engine by the 12V starter and other information, the vehicle controller comprehensively judges whether the low-voltage storage battery is enough to support the 12V starter to start the engine or not, and avoids the safety risk caused by the failure of starting the engine by the 12V starter in the dynamic driving process.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device and server embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a magnetic or optical disk, or the like.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. An automobile starting system based on intelligent management of a low-voltage storage battery is characterized by comprising the storage battery, an IBS sensor, an engine control system, a vehicle control unit and a DC/DC converter, wherein the IBS sensor is arranged at the negative pole of the storage battery, the IBS sensor is connected with the engine control system, the engine control system is connected with the vehicle control unit, the vehicle control unit is connected with the DC/DC converter through CAN communication, and the DC/DC converter is connected with the storage battery;
the IBS sensor is used for monitoring the battery state information of the storage battery and the voltage drop value information in the process of starting the engine by the 12V starter in real time;
the engine control system is used for receiving the battery state information and the voltage drop value information and feeding back the information to the whole vehicle controller;
the vehicle control unit is used for adjusting the charging power/voltage of the DC/DC converter to the storage battery in real time and controlling the SOC of the storage battery to meet a preset SOC threshold value;
the starting system further comprises a DC/DC converter fault processing module, wherein the DC/DC converter fault processing module is used for limiting the vehicle speed of the vehicle in a stepped mode according to a preset scheme when the DC/DC converter is in fault, and the preset scheme is as follows: and step limiting the maximum vehicle speed of the vehicle according to the SOC of the storage battery.
2. The intelligent management-based vehicle starting system for the low-voltage storage battery as claimed in claim 1, wherein the battery state information comprises at least one selected from the group consisting of: SOC, SOH, SOF, voltage, current, and temperature information.
3. The automobile starting system based on intelligent management of the low-voltage storage battery as claimed in claim 1, further comprising a voltage correction module, wherein the voltage correction module is used for correcting the charging power/voltage of the storage battery within the life cycle of the whole automobile when the storage battery is aged or decayed.
4. The system of claim 1, further comprising a start determining module, wherein the start determining module is configured to determine whether the 12V starter can start the engine when the IBS sensor fails or communication is abnormal.
5. The automobile starting system based on intelligent management of the low-voltage storage battery as claimed in claim 1, further comprising an early warning module, wherein the early warning module is used for prompting a user through instrument characters, voice or an early warning lamp when the storage battery is deeply discharged or seriously damaged.
6. A starting method of a vehicle based on intelligent management of a low-voltage storage battery, which is applied to the starting system according to any one of claims 1-5, and is characterized by comprising the following steps:
monitoring battery state information of the storage battery and voltage drop value information in the process of starting an engine by a 12V starter in real time;
sending the battery state information and the voltage drop value information to the vehicle control unit;
the vehicle control unit adjusts the charging power/voltage of the DC/DC converter to the storage battery in real time according to the battery state information and the voltage drop value information, and controls the SOC value of the storage battery to meet a preset SOC threshold value;
when the DC/DC converter fails, the vehicle speed of the vehicle is limited in a stepped mode according to a preset scheme, wherein the preset scheme is as follows: and step limiting the maximum vehicle speed of the vehicle according to the SOC of the storage battery.
7. The vehicle starting method based on intelligent management of the low-voltage storage battery as claimed in claim 6, wherein the starting method further comprises the step of correcting the charging power/voltage of the storage battery according to the SOH within the life cycle of the whole vehicle when the storage battery is aged or decayed.
8. The method for starting an automobile based on intelligent management of the low-voltage storage battery as claimed in claim 6, wherein the starting method further comprises the step of judging whether the 12V starter can start the engine or not according to the voltage at the low-voltage end of the DC/DC converter, the power supply voltage of the whole automobile controller and the static terminal voltage of the storage battery collected by the engine control system when the IBS sensor fails or communication is abnormal.
9. The automobile starting method based on intelligent management of the low-voltage storage battery as claimed in claim 6, wherein the starting method further comprises the following steps:
when the storage battery is deeply discharged or seriously damaged, a user is prompted through instrument characters, sound or an early warning lamp.
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| CN111817419A (en) * | 2020-08-11 | 2020-10-23 | 浙江三一装备有限公司 | Intelligent power management system and power management method of crawler crane |
| CN114103921B (en) * | 2020-08-27 | 2023-12-12 | 比亚迪股份有限公司 | Vehicle protection control method, device and readable storage medium |
| CN112124300A (en) * | 2020-09-02 | 2020-12-25 | 长城汽车股份有限公司 | Vehicle limp control method and controller |
| CN114312738B (en) * | 2020-10-10 | 2023-07-21 | 长城汽车股份有限公司 | Cold start control method, device, medium, whole vehicle controller and system |
| CN112234819B (en) * | 2020-10-14 | 2022-02-01 | 睿驰电装(大连)电动系统有限公司 | Low-voltage power supply method and device based on DC-DC and electronic equipment |
| CN112727655B (en) * | 2020-12-17 | 2022-08-30 | 东风汽车有限公司 | Automobile start-stop control method, storage medium and electronic equipment |
| CN113071370B (en) * | 2021-03-24 | 2022-12-30 | 浙江合众新能源汽车有限公司 | Management method of low-voltage lithium battery of electric automobile and complete automobile power supply switching method |
| CN113147631B (en) * | 2021-05-06 | 2023-03-31 | 重庆金康赛力斯新能源汽车设计院有限公司 | Output power determination method of low-voltage converter and related equipment |
| CN115047341A (en) * | 2021-09-27 | 2022-09-13 | 长城汽车股份有限公司 | Method and device for determining starting capacity of storage battery, storage medium and vehicle |
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| JP5590158B2 (en) * | 2011-02-02 | 2014-09-17 | トヨタ自動車株式会社 | Control device for vehicle drive device |
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| KR101637710B1 (en) * | 2014-10-30 | 2016-07-07 | 현대자동차주식회사 | Circuit for controlling Low power DC-DC Converter and method for controlling Low power DC-DC Converter |
| CN104986047B (en) * | 2015-05-28 | 2017-12-05 | 安徽江淮汽车集团股份有限公司 | A kind of low pressure hybrid power automobile battery system control method |
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