CN114726038A - Vehicle starting power supply system and control method - Google Patents
Vehicle starting power supply system and control method Download PDFInfo
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- CN114726038A CN114726038A CN202210362125.3A CN202210362125A CN114726038A CN 114726038 A CN114726038 A CN 114726038A CN 202210362125 A CN202210362125 A CN 202210362125A CN 114726038 A CN114726038 A CN 114726038A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本发明公开了一种车辆启动供电系统及方法，所述系统包括：控制模块，用于接收车辆启动信号，并根据所述车辆启动信号发出控制信号；执行模块，包括并联连接的第一供电电路、第二供电电路以及分别与所述第一供电电路和所述第二供电电路连接的控制开关，所述第一供电电路包括串联连接的第一电源和起动机，所述第二供电电路包括串联连接的第二电源和负载单元；其中，所述控制模块与所述控制开关的控制端电性连接，以在接收到所述控制信号后导通对应的供电电路。本发明解决了现有技术中车辆在进行启动时整车负载不能进行正常工作而导致车辆安全性低的问题。
The invention discloses a vehicle starting power supply system and method. The system includes: a control module, which is used for receiving a vehicle starting signal and sending out a control signal according to the vehicle starting signal; an execution module, including a first power supply circuit connected in parallel , a second power supply circuit and a control switch respectively connected with the first power supply circuit and the second power supply circuit, the first power supply circuit includes a first power supply and a starter connected in series, the second power supply circuit includes A second power supply and a load unit connected in series; wherein, the control module is electrically connected to the control terminal of the control switch, so as to turn on the corresponding power supply circuit after receiving the control signal. The invention solves the problem in the prior art that the vehicle load cannot work normally when the vehicle is started, resulting in low vehicle safety.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a vehicle starting power supply system and a control method.
Background
With the continuous development of society, automobiles enter thousands of households, hybrid new energy vehicle types are more and more favored by people due to the fact that the hybrid new energy vehicle types are more environment-friendly than traditional fuel oil vehicles, and in order to reflect the advantages and the characteristics of the new energy vehicle types, the hybrid new energy vehicle types have larger differences in many aspects compared with the traditional fuel oil vehicle types, such as starting of a power supply system.
At present, when an engine is started, a traditional 12V storage battery provides a strong starting current (generally 200-450A) for a starter, and compared with a traditional automobile, a hybrid in hybrid electric vehicle (PHEV) is added with a new three-electricity (battery pack, motor, electric control and DCDC) system, so that the PHEV has three driving modes of EV (pure electric), ECO (hybrid electric) and Power (engine). When the PHEV vehicle is switched to an ECO driving mode from an EV mode, an engine needs to be started, other electric appliances such as an air conditioner, an EPS (electric power storage system), an ESP (electronic stability program) and the like of the whole vehicle also work, and the total peak current required by the load of the whole vehicle is higher.
However, conventional batteries provide a limited current, and DCDC has a limited current protection threshold. When the DCDC is in current-limiting protection, the current requirements of a starter of an engine and other electric appliances of the whole vehicle cannot be met at the same time, and the situation that the total peak current of a normal load is higher than the power supply current of a power supply device may exist, so that the power supply voltage of the whole vehicle is pulled down instantly, and important controllers such as an ECU, an ESP and a three-way system cannot work normally, thereby seriously affecting the safety of the whole vehicle.
Disclosure of Invention
In view of this, the present invention aims to provide a vehicle starting power supply system and a control method thereof, so as to solve the problem that the vehicle safety is low because the load of the entire vehicle cannot work normally when the vehicle is started in the prior art.
The embodiment of the invention is realized as follows: a vehicle start-up power supply system, the system comprising:
the control module is used for receiving a vehicle starting signal and sending a control signal according to the vehicle starting signal;
the execution module comprises a first power supply circuit, a second power supply circuit and a control switch, wherein the first power supply circuit and the second power supply circuit are connected in parallel, the control switch is respectively connected with the first power supply circuit and the second power supply circuit, the first power supply circuit comprises a first power supply and a starter which are connected in series, and the second power supply circuit comprises a second power supply and a load unit which are connected in series;
the control module is electrically connected with the control end of the control switch so as to conduct the corresponding power supply circuit after receiving the control signal.
Further, in the vehicle starting power supply system, the first power supply is a storage battery, and the second power supply is a high-voltage battery pack.
Further, the vehicle starts the power supply system, wherein the control switch is a relay.
Further, the vehicle starts the power supply system, wherein the control module is a hybrid vehicle controller, and a PIN of the hybrid vehicle controller is connected with a PIN of the relay.
Another object of the present invention is to provide a vehicle-startup power supply system control method for controlling the vehicle-startup power supply system, the method including:
when a starting signal of a vehicle engine is detected, sending a control signal;
and controlling the disconnection control switch according to the control signal so as to enable the first power supply circuit and the second power supply circuit to supply power respectively.
Further, the vehicle-start power supply control method may further include, after the step of controlling to turn off the control switch according to the control signal, so that the first power supply circuit and the second power supply circuit supply power respectively:
when an idling speed signal of the engine is detected, a control signal is sent out;
and controlling to turn on the control switch according to the control signal so as to enable the first power supply circuit and the second power supply circuit to supply power collectively.
Further, in the vehicle starting power supply control method, the control signal is a pulse signal.
Further, the vehicle-start power supply control method includes:
acquiring a current value required by a load unit, and judging whether the current value is higher than a current threshold value;
if so, controlling the control switch to keep a preset state, and supplying power through the first power supply circuit and/or the second power supply circuit;
if not, executing the step of sending out a control signal when detecting a starting signal of the vehicle engine.
Further, the above vehicle starting power supply control method, wherein the step of controlling the control switch to maintain a preset state and supplying power through the first power supply circuit and/or the second power supply circuit further includes:
acquiring the battery electric quantity of a storage battery, and judging whether the battery electric quantity of the storage battery is lower than a preset threshold value or not;
and if so, supplying power through the second power supply circuit.
Further, the vehicle-start power supply control method may further include, after the step of supplying power by the second power supply circuit:
judging whether the battery electric quantity of the storage battery is lower than a first preset electric quantity threshold value or not;
if yes, controlling a high-voltage battery pack to charge the storage battery, and acquiring the current residual electric quantity of the storage battery in real time in the process of charging the storage battery by the high-voltage battery pack;
judging whether the current residual electric quantity is higher than a second preset electric quantity threshold value, if so, controlling the high-voltage battery pack to stop charging the storage battery, and controlling the first power supply circuit and the second power supply circuit to supply power collectively;
the first preset electric quantity threshold is smaller than the preset threshold, and the preset threshold is smaller than the second preset electric quantity threshold.
According to the embodiment of the invention, two sets of power supply circuits are arranged, when the vehicle is started, the control switch in the execution module is controlled to be turned off or turned on according to the received starting signal so as to conduct the corresponding power supply circuit, so that the starter is independently powered by the storage battery in the process of starting the engine, and the electric appliance of the whole vehicle is independently powered by the high-voltage battery pack through DCDC, so that the normal work of the electric appliance of the whole vehicle is ensured. The problem of among the prior art at the vehicle start-up in-process, whole car voltage is pulled down in the twinkling of an eye, leads to important controllers such as ECU, ESP and three electric systems just can't normally work to assembly vehicle security is low is solved.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle startup power supply system according to a first embodiment of the invention;
FIG. 2 is a flow chart of a method for starting power supply of a vehicle according to a second embodiment of the present invention;
FIG. 3 is a flow chart of a method for starting power supply of a vehicle according to a third embodiment of the present invention;
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
With the continuous development of society, automobiles enter thousands of households, hybrid new energy automobile models are more and more favored by people due to the fact that the hybrid new energy automobile models are more environment-friendly than traditional fuel oil automobiles, and in order to reflect the advantages and the characteristics of the new energy automobile models, the hybrid new energy automobile models are greatly different from the traditional fuel oil automobile models in many aspects, such as starting a power supply system.
At present, when an engine is started, a traditional 12V storage battery provides a strong starting current (generally 200-450A) for a starter, and compared with a traditional automobile, a hybrid in hybrid electric vehicle (PHEV) is added with a new three-electricity (battery pack, motor, electric control and DCDC) system, so that the PHEV has three driving modes of EV (pure electric), ECO (hybrid electric) and Power (engine). When the PHEV is switched to an ECO driving mode from an EV mode, an engine needs to be started, other electric appliances such as an air conditioner, an EPS (electric power storage) and an ESP (electronic stability program) of the whole vehicle work at the same time, and the total peak current required by the load of the whole vehicle is higher.
However, conventional batteries provide limited current, and DCDC has a limited current protection threshold. When the DCDC is in current-limiting protection, the current requirements of a starter of an engine and other electric appliances of the whole vehicle cannot be met at the same time, and the situation that the total peak current of a normal load is higher than the power supply current of a power supply device may exist, so that the power supply voltage of the whole vehicle is pulled down instantly, and important controllers such as an ECU, an ESP and a three-way system cannot work normally, thereby seriously affecting the safety of the whole vehicle. The following will describe in detail how to ensure the normal operation of the entire vehicle load when the vehicle is started, with reference to the specific embodiments and the accompanying drawings.
Example one
Referring to fig. 1, a vehicle starting power supply system according to a first embodiment of the present invention is shown, the system includes an execution module and a control module for controlling the execution module; wherein:
the control module is used for receiving a vehicle starting signal and sending a control signal according to the vehicle starting signal after receiving the vehicle starting signal;
the execution module comprises a first power supply circuit, a second power supply circuit and a control switch, wherein the first power supply circuit and the second power supply circuit are connected in parallel, the control switch is respectively connected with the first power supply circuit and the second power supply circuit, and the control end of the control switch is electrically connected with the control module so as to conduct the corresponding power supply circuit after receiving a control signal.
It can be understood that, by providing two sets of power supply circuits, when the vehicle is started, the control switch in the execution module is controlled to be turned off or turned on according to the received start signal to turn on the corresponding power supply circuit, so that in the process of starting the engine, the electrical appliances in the vehicle and the starter 30 are respectively supplied with power through different power supply circuits, and the normal operation of the electrical appliances of the entire vehicle is ensured.
Specifically, the first power supply circuit includes a first power source and a starter 30 connected in series, and the second power supply circuit includes a second power source and a load unit 40 connected in series, wherein the first power source is a battery 50 and mainly supplies power to the starter 30 during the starting of the vehicle, the second power source is a high voltage battery pack 60 and mainly supplies power to the load unit 40 on the vehicle, and the load unit 40 includes, but is not limited to, an Electric Power Steering (EPS), a heater (PTC), and an MBOX.
Further, the high voltage battery pack 60 generally provides high voltage, and since the load unit 40 is mainly powered by low voltage direct current, a DCDC70 (high voltage converter) is provided between the high voltage battery pack 60 and the load unit 40 to ensure that the load unit 40 is normally powered by the high voltage battery pack 60. The DCDC70 has the function of converting the high voltage of the high voltage battery pack 60 into a constant low voltage of 14V or 12V, so as to supply power to the electric appliances of the whole vehicle and assist the battery 50 in charging. The output power of DCDC70 applied to a PHEV model is generally 2.5KW, the overcurrent protection threshold is 200A, and the full-load peak working current of other loads of the whole PHEV is less than or equal to 180A, so that the normal work of other loads can be ensured.
By way of example and not limitation, in the present embodiment, the control switch is the relay 20, and by controlling the actuation and the opening of the relay 20, the storage battery 50 can be controlled to supply power to the starter 30 alone, the high-voltage battery pack 60 can be controlled to supply power to the load electrical appliances of the entire vehicle alone, or the storage battery 50 and the high-voltage battery pack 60 can be controlled to supply power to the electrical appliances of the entire vehicle at the same time.
More further, the control module is HCU10 (hybrid vehicle control unit), HCU10 passes through the starting signal that the whole car of car CAN network collection sent, and later send control signal according to starting signal, specifically, acquire that starting signal is after Microprocessing Controller (MCU) handles, by the high level of hybrid vehicle control unit's PIN foot output pulse signal, the coil action after pulse signal high level is received to relay 20 PIN, the on-off state is changed into normally to open by the normally closed. At this time, the circuit between the battery 50 and other loads such as DCDC70 is disconnected, and only the starter 30 is supplied with power alone, so that the engine can be effectively ensured to be started successfully, and the working power of other loads of the whole vehicle is supplied by the DCDC70 (high voltage converter).
In summary, in the vehicle starting power supply system in the above embodiment of the present invention, two sets of power supply circuits are provided, and when the vehicle is started, the control switch in the execution module is controlled to be turned off or turned on according to the received starting signal to conduct the corresponding power supply circuit, so that in the process of starting the engine, the starter 30 is separately supplied with power by the storage battery 50, and the entire electrical appliance is separately supplied with power by the high-voltage battery pack 60 through the DCDC70, thereby ensuring the normal operation of the entire electrical appliance. The problem of among the prior art at the vehicle start-up in-process, whole car voltage is pulled down in the twinkling of an eye, leads to important controllers such as ECU, ESP and three electric systems just can't normally work to assembly vehicle security is low is solved.
Example two
Referring to fig. 2, a control method for a vehicle starting power supply system according to a second embodiment of the present invention is shown, for controlling the vehicle starting power supply system provided in the first embodiment of the present invention, and the method includes steps S20 to S23.
In step S20, when a start signal of the vehicle engine is detected, a control signal is issued.
The hybrid vehicle controller is in communication connection with a controller (for example, a keyless start system) for controlling vehicle start so as to receive a start signal sent by the controller for controlling vehicle start, and specifically, the hybrid vehicle controller is in communication connection with the controller for controlling vehicle start through a CAN network.
And step S21, controlling the switch-off control switch according to the control signal so as to enable the first power supply circuit and the second power supply circuit to respectively supply power.
Specifically, a PIN PIN of the hybrid vehicle controller outputs a high-level pulse signal, a PIN of the relay receives the high-level pulse signal, then the coil acts, and the switch state is changed from normally closed to normally open. At the moment, circuits between the storage battery and other loads such as a finished automobile DCDC are disconnected, so that the storage battery only supplies power to the starter independently, the load unit of the finished automobile is supplied with power by the high-voltage battery pack through the DCDC, the engine can be effectively guaranteed to be started successfully, and other loads of the finished automobile operate normally.
And step S22, when the idle speed signal of the engine is detected, a control signal is sent out.
Specifically, a PIN PIN of the hybrid vehicle controller outputs a low-level pulse signal, a coil releases after a relay PIN receives the low-level signal, and the on-off state of the relay is reset from normally open to normally closed.
And step S23, controlling and turning on the control switch according to the control signal so as to enable the first power supply circuit and the second power supply circuit to supply power collectively.
The relay switch state is normally closed by normally open reset, the high-voltage battery pack supplies power to the electric appliance of the whole vehicle through DCDC at the moment, and the storage battery supplies power as an auxiliary power supply. And when the idling speed signal of the engine is detected, the current vehicle is in a starting state, and power supply to the starter is not needed, so that the first power supply circuit and the second power supply circuit are conducted, the high-voltage battery pack supplies power to the electric appliance of the whole vehicle through DCDC, the storage battery is used as an auxiliary power supply to supply power to the load of the whole vehicle in a collective manner, and when the electric quantity of the storage battery is low, the high-voltage battery pack can also charge the storage battery through DCDC.
In summary, in the vehicle starting power supply method in the above embodiments of the present invention, when the vehicle is started, the control switch in the execution module is controlled to be turned off or turned on according to the received start signal to turn on the corresponding power supply circuit, so that in the process of starting the engine, the starter is separately supplied with power by the storage battery, the entire vehicle electrical appliance is separately supplied with power by the high-voltage battery pack through the DCDC, the normal operation of the entire vehicle electrical appliance is ensured, and after the vehicle is started, the control switch is controlled to switch the power supply circuit. The problem of among the prior art at the vehicle start-up in-process, whole car voltage is pulled down in the twinkling of an eye, leads to important controllers such as ECU, ESP and three electric systems just can't normally work to can also guarantee the normal use of battery when assembling the low problem of vehicle security.
EXAMPLE III
Referring to fig. 3, a vehicle startup power supply method provided in a third embodiment of the present invention is shown for controlling a vehicle startup power supply system in the first embodiment, and the method includes steps S30 to S34.
Step S30, acquiring the current value needed by the load unit, and judging whether the current value is higher than the current threshold value; if not, go to step S31, and if so, go to step S32.
In practice, because the starting power supply system of the conventional automobile at present provides a strong starting current (generally up to 200-450A) for a starter by a conventional 12V storage battery when an engine is started, compared with the conventional automobile, a new three-power (battery pack, motor, electric control and DCDC) system is added to the PHEV hybrid new energy vehicle type, so that when the engine of the PHEV automobile needs to be started, the whole air conditioner, EPS, ESP and other electrical appliances also work, and at this time, the total peak current required by the whole load can reach 430-480A. While the conventional storage battery is difficult to provide such high current alone, the DCDC has a current limit protection threshold 200A. When the DCDC is in current-limiting protection, the current requirements of a starter and other electric appliances of the whole vehicle cannot be met at the same time, therefore, two power supply circuits are arranged, the problem that the current required by the load of the whole vehicle is overlarge in the starting process of the vehicle, and the storage battery and the DCDC cannot provide corresponding current to ensure the normal work of the load of the whole vehicle is avoided, the two power supply circuits are arranged, the power supply circuits are switched in the starting process, although the problem of overlarge current can be solved, the control switch is frequently switched to switch and adjust the power supply circuits, the service life of a vehicle starting power supply system can be reduced to a certain extent, therefore, when the vehicle is started, the current required by the current load of the vehicle is obtained before the control switch is switched, whether the current load current can be provided by the storage battery or a high-voltage battery pack is judged, if yes, a control signal is not sent out, the control switch is kept in a preset state (namely the relay is in a normally closed state), so that frequent switching of the control switch is avoided, and the service life of a vehicle starting power supply system is prolonged.
And step S31, controlling the control switch to keep a preset state, and supplying power through the first power supply circuit and/or the second power supply circuit.
Specifically, the preset state is the state that control switch controls first power supply circuit and second power supply circuit to be in conducting, in this embodiment, the relay is in the normally closed state promptly, more specifically, when the electric current that the battery provided can satisfy whole car load required current, supply power through first power supply circuit, when the electric current that DCDC provided can satisfy whole car load required current, supply power through second power supply circuit, perhaps supply power through first power supply current and second power supply circuit.
In addition, in some optional embodiments of the present invention, the step of controlling the control switch to maintain a preset state and supplying power through the first power supply circuit and/or the second power supply circuit further includes:
acquiring the battery electric quantity of a storage battery, and judging whether the battery electric quantity of the storage battery is lower than a preset threshold value or not;
and if so, supplying power through the second power supply circuit.
It will be appreciated that when the battery power of the accumulator is low, the supply of power by the second power supply circuit is preferred in order to avoid the accumulator feeding.
In addition, in some optional embodiments of the present invention, in order to improve the rationality of power supply between the first power supply circuit and the second power supply circuit, the step of supplying power by the second power supply circuit further includes:
judging whether the battery electric quantity of the storage battery is lower than a first preset electric quantity threshold value or not;
if so, controlling a high-voltage battery pack to charge the storage battery, and acquiring the current residual electric quantity of the storage battery in real time in the process of charging the storage battery by the high-voltage battery pack;
judging whether the current residual electric quantity is higher than a second preset electric quantity threshold value, if so, controlling the high-voltage battery pack to stop charging the storage battery, and controlling the first power supply circuit and the second power supply circuit to supply power collectively;
the first preset electric quantity threshold is smaller than the preset threshold, and the preset threshold is smaller than the second preset electric quantity threshold.
It can be understood that when the battery power of the storage battery is lower than the preset threshold, the entire vehicle load is only supplied with power through the second power supply circuit, the influence on the next start due to the power feed of the storage battery is avoided, and in practice, the battery power of the storage battery is already fed due to some special conditions, that is, the battery power of the storage battery is already attenuated to the first preset power threshold, and for the next normal start of the vehicle, when the battery power of the storage battery is lower than the first preset power threshold, the high-voltage battery pack is controlled to supply power to the storage battery.
Furthermore, in order to avoid that the high-voltage battery pack supplies power to the storage battery for a long time while providing the common load power supply, the current residual capacity of the storage battery is acquired in real time in the charging process of the storage battery, and when the current residual capacity of the storage battery is higher than a second preset electric capacity threshold value, the high-voltage battery pack is controlled to stop charging the storage battery, and the storage battery can be controlled to continue auxiliary power supply for the load of the whole vehicle.
In step S32, when a start signal of the vehicle engine is detected, a control signal is issued.
And step S33, controlling to turn off the control switch according to the control signal, so that the first power supply circuit and the second power supply circuit respectively supply power.
And step S34, when the idle speed signal of the engine is detected, a control signal is sent out.
And step S35, controlling and turning on the control switch according to the control signal so as to enable the first power supply circuit and the second power supply circuit to supply power collectively.
In summary, in the vehicle starting power supply method in the above embodiments of the present invention, when the vehicle is started, the control switch in the execution module is controlled to be turned off or turned on according to the received start signal to turn on the corresponding power supply circuit, so that in the process of starting the engine, the starter is separately supplied with power by the storage battery, and the high-voltage battery pack separately supplies power to the vehicle electrical appliance by the DCDC, so as to ensure normal operation of the vehicle electrical appliance, and before the control signal of the control switch is sent, the current required by the vehicle load is detected and obtained, and whether the control switch needs to be switched is determined according to the magnitude of the required current value. The problem of among the prior art at the vehicle start-up in-process, whole car voltage is pulled down in the twinkling of an eye, leads to important controllers such as ECU, ESP and three electric systems just can't normally work to can also promote the life that the vehicle starts power supply system when assembling the low problem of vehicle security.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
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| CN115092082A (en) * | 2022-08-01 | 2022-09-23 | 一汽解放汽车有限公司 | Commercial vehicle power supply system and method and vehicle |
| CN115313314A (en) * | 2022-08-23 | 2022-11-08 | 深圳市正浩创新科技股份有限公司 | Battery pack control method, electronic device and computer-readable storage medium |
| CN116557185A (en) * | 2023-06-25 | 2023-08-08 | 中国第一汽车股份有限公司 | Vehicle starter power supply control system, method, electronic device, vehicle and medium |
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