CN113328491A - Dual-power circuit for high-power load and power supply method thereof - Google Patents
Dual-power circuit for high-power load and power supply method thereof Download PDFInfo
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- CN113328491A CN113328491A CN202110601021.9A CN202110601021A CN113328491A CN 113328491 A CN113328491 A CN 113328491A CN 202110601021 A CN202110601021 A CN 202110601021A CN 113328491 A CN113328491 A CN 113328491A
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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
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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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
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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
- H02J7/0063—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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- 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
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1438—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle in combination with power supplies for loads other than 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/45—Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
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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
- Y02T10/64—Electric machine technologies in electromobility
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
The utility model relates to a dual-power circuit for a high-power load and a power supply method thereof, relating to the technical field of automobile electronics, comprising a first battery, a starter, an engine and a generator, wherein the first battery is connected with both the starter and the generator, and the engine is connected with the starter and the generator; the second battery is respectively connected with the first battery and the generator through the DC/DC converter; the battery management system BMS is used for selecting whether the second battery supplies power for the high-power load through the DC/DC converter or the generator according to the working state of the engine; the battery management system BMS is also arranged to adjust the power generation of the generator when the generator is supplying power to a high power load, so that the generator matches the high power load. The electric balance of the whole vehicle and the reliability of the high-power load can be guaranteed.
Description
Technical Field
The application relates to the technical field of automotive electronics, in particular to a dual-power circuit for a high-power load and a power supply method thereof.
Background
The power supply scheme of the traditional high-power load vehicle type has the following forms, one form is that a double-group storage battery parallel power supply scheme is adopted, an isolator matched with the storage battery is not arranged, and the scheme is easy to cause over-charge or over-discharge of the storage battery to accelerate damage of the storage battery; secondly, a power supply mode with two groups of storage batteries connected in parallel is adopted, and a storage battery isolator is additionally arranged to isolate the two groups of storage batteries, so that the problem of over-discharge of the storage batteries cannot be protected although the storage batteries can be improved to a certain extent; thirdly, the high-power load is supplied with power by increasing the battery capacity of the single group of storage batteries, and the scheme is easy to cause the reduction of the charging efficiency of the storage batteries or the insufficient charging of the storage batteries.
Therefore, the three power supply schemes cannot completely solve the problem that the power supply is matched with a high-power load, and the storage battery claim rate is high.
Disclosure of Invention
The embodiment of the application provides a dual-power circuit for a high-power load and a power supply method thereof, which are used for solving the problem that the matching of a power supply and the high-power load cannot be completely solved in the related technology.
In a first aspect, a dual power supply circuit for a high-power load is provided, which comprises a first battery, a starter, an engine, a generator, a second battery, a battery management system BMS and a DC/DC converter, wherein the first battery is connected with the starter and the generator;
the second battery is respectively connected with the first battery and the generator through the DC/DC converter;
meanwhile, the battery management system BMS is configured to select whether the high-power load is powered by the second battery through the DC/DC converter or the generator according to an operating state of the engine;
and the battery management system BMS is also used for adjusting the power generation amount of the generator when the generator supplies power to the high-power load so as to enable the generator to be matched with the high-power load.
In the embodiment of the application, the dual power supply circuit comprises a first battery, a starter, an engine, a generator, a second battery, a battery management system BMS and a DC/DC converter, the first battery supplies power to the starter, the starter starts the engine, the engine provides power for the whole vehicle and drives the generator to generate power, the generator provides power for the whole vehicle (for example, supplies power to a high-power load through the DC/DC converter), and charges the first battery and the second battery; the battery management system BMS selects one of the second battery and the generator to supply power for the high-power load according to whether the engine works, namely, the generator supplies power for the high-power load or the second battery supplies power for the high-power load through the DC/DC converter, so that when the engine cannot normally drive the generator to output electric energy, the second battery serves as a standby power supply to supply power for the high-power load, the use reliability of the high-power load is guaranteed, and when the generator is used for supplying power for the high-power load, the battery management system BMS adjusts the generated energy of the generator so that the generator can be matched with the high-power load, and the electric balance of the whole vehicle is guaranteed.
In some embodiments, if the engine is in a non-operating state, the battery management system BMS is configured to control the second battery to supply power to the high-power load through the DC/DC converter;
and if the engine is in a working state, the battery management system BMS is used for controlling the generator to supply power to the high-power load through the DC/DC converter.
In this embodiment, the generator and the second battery both supply power to the high-power load through a DC/DC converter, and the battery management system BMS determines who supplies power to the high-power load, either the generator or the second battery, depending on whether the engine is in operation. Specifically, when the engine is in a non-working state, the rotating speed output is zero, the generator cannot be driven to generate power, and thus naturally the high-power load cannot be normally used through the power supply provided by the generator.
In some embodiments, the battery management system BMS is further configured to adjust the power generation amount of the power generator based on the acquired information on the power amounts of the first and second batteries and the usage information on all loads connected to the dual power supply circuit when the power generator supplies power to the high power load through the DC/DC converter.
When the generator supplies power to the high-power load through the DC/DC converter, if the electric quantity of the first battery or the second battery is low, the generator is required to charge the first battery or the second battery, under the condition, the battery management system BMS controls the electric quantity of the engine to be increased, and similarly, when the high-power load to be supplied with power by the generator is large, the previous electric quantity of the generator cannot enable the high-power load to be normally used, the electric quantity of the generator is also increased so that the generator can be matched with the high-power load, the electric balance of the whole vehicle is ensured, and the high-power load can be normally used.
In some embodiments, further comprising:
and the display is connected with the battery management system BMS and used for displaying the electric quantity information of the first battery and the second battery acquired by the battery management system BMS and the use information of all loads connected to the dual-power-supply circuit.
In this embodiment, all the loads include a normal load and a high-power load, and the display displays the power information of the first battery and the second battery, and also displays the use information of each load, and the use status of each load, so as to show the user.
In some embodiments, the battery management system BMS is communicatively coupled to the generator via a CAN bus. The battery management system BMS is in communication connection with the generator through the CAN bus, acquires the power generation condition of the generator, and adjusts the power generation amount of the generator according to the acquired power information of the first battery and the second battery and the use information of all loads connected to the dual power supply circuit.
In some embodiments, the battery management system BMS is further configured to control the second battery to charge the first battery when it is determined that the capacity of the first battery is lower than a set capacity.
In this embodiment, when the electric quantity of the first battery is too low, the starter cannot be normally started, and then the battery management system BMS controls the second battery to charge the first battery, so that the electric energy of the first battery can normally start the engine by the starter.
In some embodiments, the battery management system BMS is integrally provided with the DC/DC converter. In the embodiment of the application, the battery management system BMS can be independent from the DC/DC converter and can also be integrated on the same controller, so that the normal use of a high-power load can be ensured, and the whole vehicle can be designed in a light weight manner.
In some embodiments, the first battery comprises a lead storage battery; and/or the second battery comprises a 24V lithium battery; and/or the high power load comprises at least a parking air conditioner.
In a second aspect, a power supply method for a dual power supply circuit for a high-power load is also provided, which includes the following steps:
providing a dual power supply circuit for a high power load as described above;
the battery management system BMS selects whether the second battery supplies power to the high-power load through the DC/DC converter or the generator supplies power to the high-power load according to the working state of the engine;
if the generator is selected to supply power to the high-power load, the battery management system BMS adjusts the power generation amount of the generator so that the generator is matched with the high-power load.
In the embodiment of the application, the generator and the second battery are used as double power supplies to supply power to the high-power load, so that the high-power load can be ensured to obtain power at any time when the engine is powered, the output power generation amount of the generator suitable for the high-power load can be matched, and the reliable use of the high-power load and the electric balance of the whole vehicle are ensured.
In some embodiments, the specific step of selecting, by the battery management system BMS, whether to supply the high power load by the second battery through the DC/DC converter or by the generator according to the operating state of the engine includes:
if the engine is in a non-working state, the battery management system BMS controls the second battery to supply power to the high-power load through the DC/DC converter;
and if the engine is in a working state, the battery management system BMS controls the generator to supply power to the high-power load through the DC/DC converter.
In this embodiment, the generator and the second battery both supply power to the high-power load through a DC/DC converter, and the battery management system BMS determines who supplies power to the high-power load, either the generator or the second battery, depending on whether the engine is in operation. Specifically, when the engine is in a non-working state, the rotating speed output is zero, the generator cannot be driven to generate power, and thus naturally the high-power load cannot be normally used through the power supply provided by the generator.
In some embodiments, the specific step of the battery management system BMS adjusting the power generation amount of the generator includes:
and the battery management system BMS adjusts the power generation amount of the generator according to the acquired electric quantity information of the first battery and the second battery and the use information of all loads connected to the dual-power circuit. The embodiment of the application can improve the generating capacity of the generator so that the generator can be matched with a high-power load, the electric balance of the whole vehicle is guaranteed, and the high-power load can be normally used.
The beneficial effect that technical scheme that this application provided brought includes: the generator and the second battery are used as double power supplies to supply power to the high-power load, so that the high-power load can be guaranteed to obtain power at any time of the engine, the output generating capacity of the generator suitable for the high-power load can be matched, and the electric balance of the whole vehicle and the reliability use of the high-power load are guaranteed.
The embodiment of the application provides a double-power-supply circuit for a high-power load and a power supply method thereof, which adopt a double-power-supply mode, a first battery supplies power to a starter, the starter starts an engine, the engine provides power for a whole vehicle and drives a generator to generate power, the generator provides electric energy for the whole vehicle and charges the first battery, when the high-power load in the whole vehicle needs to be used, the battery management system BMS selects a second battery to supply power for the high-power load through the DC/DC converter according to whether the engine works or not, or the generator supplies power for the high-power load, and when the generator supplies power for the high-power load, the battery management system BMS adjusts the generated energy of the generator to ensure that the generator is matched with the high-power load and the electric balance of the whole vehicle is ensured, the second battery can also be used to power a high power load when the generator is unable to power the high power load. Therefore, the generator and the second battery are used as double power supplies to supply power to the high-power load, the high-power load can be guaranteed to obtain power at any time of the engine, the output generating capacity of the generator suitable for the high-power load can be matched, and the electric balance of the whole vehicle and the reliability use of the high-power load are guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a dual power supply circuit for a first high-power load according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a dual power supply circuit for a second high-power load according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a dual power supply circuit for a third high-power load according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a dual power supply circuit for a fourth high-power load according to an embodiment of the present application
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a dual-power circuit for a high-power load, which takes a generator and a second battery as dual power supplies to the high-power load, so that the high-power load can be ensured to obtain power supply at any time when an engine is started, the output power generation amount of the generator suitable for the high-power load can be matched, and the electric balance of the whole vehicle and the reliability use of the high-power load are ensured.
As shown in fig. 1, the present embodiment provides a dual power supply circuit for a high-power load, including a first battery, a starter, an engine, a generator, a battery management system BMS, and a DC/DC converter, wherein the first battery is connected to both the starter and the generator, and the engine is connected to the starter and the generator;
the second battery is respectively connected with the first battery and the generator through the DC/DC converter;
meanwhile, the battery management system BMS is configured to select whether the high-power load is powered by the second battery through the DC/DC converter or the generator according to an operating state of the engine;
and the battery management system BMS is also used for adjusting the power generation amount of the generator when the generator supplies power to the high-power load so as to enable the generator to be matched with the high-power load.
In the embodiment of the application, the dual power supply circuit comprises a first battery, a starter, an engine, a generator, a second battery, a battery management system BMS and a DC/DC converter, the first battery supplies power to the starter, the starter starts the engine, the engine provides power for the whole vehicle and drives the generator to generate power, the generator provides power for the whole vehicle (for example, supplies power to a high-power load through the DC/DC converter), and charges the first battery and the second battery; the battery management system BMS selects one of the second battery and the generator to supply power for the high-power load according to whether the engine works, namely, the generator supplies power for the high-power load or the second battery supplies power for the high-power load through the DC/DC converter, so that when the engine cannot normally drive the generator to output electric energy, the second battery serves as a standby power supply to supply power for the high-power load, the use reliability of the high-power load is ensured, and when the generator is used for supplying power for the high-power load, the battery management system BMS adjusts the generated energy of the generator so that the generator can be matched with the high-power load, and the electric balance of the whole vehicle is ensured;
therefore, the generator and the second battery are used as double power supplies to supply power to the high-power load, the high-power load can be guaranteed to obtain power at any time of the engine, the output power generation amount of the generator suitable for the high-power load can be matched, and the reliable use of the high-power load and the electric balance of the whole vehicle are guaranteed.
Further, if the engine is in a non-working state, the battery management system BMS is configured to control the second battery to supply power to the high-power load through the DC/DC converter; and if the engine is in a working state, the battery management system BMS is used for controlling the generator to supply power to the high-power load through the DC/DC converter.
In this embodiment, the generator and the second battery both supply power to the high-power load through a DC/DC converter, and the battery management system BMS determines who supplies power to the high-power load, either the generator or the second battery, depending on whether the engine is in operation. Specifically, when the engine is in a non-working state, the rotating speed output is zero, the generator cannot be driven to generate power, and thus naturally the high-power load cannot be normally used through the power supply provided by the generator.
Further, the battery management system BMS is configured to adjust the power generation amount of the generator according to the acquired information on the power amounts of the first and second batteries and the usage information on all loads connected to the dual power supply circuit when the generator supplies power to the high-power load through the DC/DC converter.
In this embodiment, when the generator supplies power to the high-power load through the DC/DC converter, if the first battery or the second battery has a low electric quantity, the generator is required to charge the first battery or the second battery, in this case, the battery management system BMS controls the electric power generation amount of the engine to increase, and similarly, when the high-power load to be supplied with power by the generator is large, the electric power generation amount of the previous generator cannot be used normally by the high-power load, the electric power generation amount of the generator is also increased so that the generator can be matched with the high-power load, and the electric balance of the whole vehicle is ensured, so that the high-power load can be used normally.
As shown in fig. 3, further, the dual power supply circuit further includes:
and the display is connected with the battery management system BMS and used for displaying the electric quantity information of the first battery and the second battery acquired by the battery management system BMS and the use information of all loads connected to the dual-power-supply circuit.
As shown in fig. 4, in the present embodiment, all the loads include a normal load and a high-power load, and the display displays the power information of the first battery and the second battery, and also displays the usage information of each load, and also displays the usage status of each load, so as to show the usage status to the user.
Specifically, the battery management system BMS is communicatively connected to the generator through a CAN bus.
In the embodiment of the application, the battery management system BMS is in communication connection with the generator through the CAN bus to acquire the power generation condition of the generator, so as to adjust the power generation quantity of the generator according to the acquired power information of the first battery and the second battery and the use information of all loads connected to the dual power supply circuit.
Preferably, the battery management system BMS is further configured to control the second battery to charge the first battery when it is determined that the capacity of the first battery is lower than a set capacity.
In this embodiment, when the electric quantity of the first battery is too low, the starter cannot be normally started, and then the battery management system BMS controls the second battery to charge the first battery, so that the electric energy of the first battery can normally start the engine by the starter.
As shown in fig. 3 to 4, the battery management system BMS is further integrated with the DC/DC converter. In the embodiment of the present application, the battery management system BMS may be independent from the DC/DC converter or integrated on the same controller, as shown in fig. 3, so as to ensure normal use of a high power load and design a light vehicle.
As shown in fig. 2 to 4, specifically, the first battery includes a lead storage battery; and/or the second battery comprises a 24V lithium battery; and/or the high power load comprises at least a parking air conditioner.
In the embodiment of the application, the 24V lithium battery is an energy storage battery, which can be repeatedly charged and discharged, and when the electric quantity of the second battery is insufficient, the generator can be charged to provide power supply energy for the high-power load.
The embodiment of the application also provides a power supply method of the dual-power circuit for the high-power load, which comprises the following steps:
providing a dual power supply circuit for a high power load as described above;
the battery management system BMS selects whether the second battery supplies power to the high-power load through the DC/DC converter or the generator supplies power to the high-power load according to the working state of the engine;
if the generator is selected to supply power to the high-power load, the battery management system BMS adjusts the power generation amount of the generator so that the generator is matched with the high-power load.
In the embodiment of the application, the dual power supply circuit comprises a first battery, a starter, an engine, a generator, a second battery, a battery management system BMS and a DC/DC converter, the first battery supplies power to the starter, the starter starts the engine, the engine provides power for the whole vehicle and drives the generator to generate power, the generator provides power for the whole vehicle (for example, supplies power to a high-power load through the DC/DC converter), and charges the first battery and the second battery; the battery management system BMS selects one of the second battery and the generator to supply power for the high-power load according to whether the engine works, namely, the generator supplies power for the high-power load or the second battery supplies power for the high-power load through the DC/DC converter, so that when the engine cannot normally drive the generator to output electric energy, the second battery serves as a standby power supply to supply power for the high-power load, the use reliability of the high-power load is ensured, and when the generator is used for supplying power for the high-power load, the battery management system BMS adjusts the generated energy of the generator so that the generator can be matched with the high-power load, and the electric balance of the whole vehicle is ensured;
therefore, the generator and the second battery are used as double power supplies to supply power to the high-power load, the high-power load can be guaranteed to obtain power at any time of the engine, the output power generation amount of the generator suitable for the high-power load can be matched, and the reliable use of the high-power load and the electric balance of the whole vehicle are guaranteed.
Further, the specific step of the battery management system BMS selecting whether to supply the high power load with the second battery through the DC/DC converter or the generator according to the operating state of the engine includes:
if the engine is in a non-working state, the battery management system BMS controls the second battery to supply power to the high-power load through the DC/DC converter;
and if the engine is in a working state, the battery management system BMS controls the generator to supply power to the high-power load through the DC/DC converter.
In this embodiment, the generator and the second battery both supply power to the high-power load through a DC/DC converter, and the battery management system BMS determines who supplies power to the high-power load, either the generator or the second battery, depending on whether the engine is in operation. Specifically, when the engine is in a non-working state, the rotating speed output is zero, the generator cannot be driven to generate power, and thus naturally the high-power load cannot be normally used through the power supply provided by the generator.
Further, the specific step of the battery management system BMS adjusting the power generation amount of the generator includes:
and the battery management system BMS adjusts the power generation amount of the generator according to the acquired electric quantity information of the first battery and the second battery and the use information of all loads connected to the dual-power circuit.
In this embodiment, when the generator supplies power to the high-power load through the DC/DC converter, if the first battery or the second battery has a low electric quantity, the generator is required to charge the first battery or the second battery, in this case, the battery management system BMS controls the electric power generation amount of the engine to increase, and similarly, when the high-power load to be supplied with power by the generator is large, the electric power generation amount of the previous generator cannot be used normally by the high-power load, the electric power generation amount of the generator is also increased so that the generator can be matched with the high-power load, and the electric balance of the whole vehicle is ensured, so that the high-power load can be used normally.
As shown in fig. 3, further, the dual power supply circuit provided in the embodiment of the present application further includes:
and the display is connected with the battery management system BMS and used for displaying the electric quantity information of the first battery and the second battery acquired by the battery management system BMS and the use information of all loads connected to the dual-power-supply circuit.
As shown in fig. 4, in the present embodiment, all the loads include a normal load and a high-power load, and the display displays the power information of the first battery and the second battery, and also displays the usage information of each load, and also displays the usage status of each load, so as to show the usage status to the user.
In the embodiment of the application, the battery management system BMS is in communication connection with the generator through the CAN bus to acquire the power generation condition of the generator, so as to adjust the power generation quantity of the generator according to the acquired power information of the first battery and the second battery and the use information of all loads connected to the dual power supply circuit.
Preferably, the battery management system BMS further controls the second battery to charge the first battery when it is determined that the capacity of the first battery is lower than a set capacity.
In this embodiment, when the electric quantity of the first battery is too low, the starter cannot be normally started, and then the battery management system BMS controls the second battery to charge the first battery, so that the electric energy of the first battery can normally start the engine by the starter.
As shown in fig. 3 to 4, the battery management system BMS is further integrated with the DC/DC converter. In the embodiment of the present application, the battery management system BMS may be independent from the DC/DC converter or integrated on the same controller, as shown in fig. 3, so as to ensure normal use of a high power load and design a light vehicle.
As shown in fig. 2 to 4, specifically, the first battery includes a lead storage battery; and/or the second battery comprises a 24V lithium battery; and/or the high power load comprises at least a parking air conditioner.
In the embodiment of the application, the 24V lithium battery is an energy storage battery, which can be repeatedly charged and discharged, and when the electric quantity of the second battery is insufficient, the generator can be charged to provide power supply energy for the high-power load.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A dual-power circuit for a high-power load comprises a first battery, a starter, an engine and a generator, wherein the first battery is connected with the starter and the generator, and the engine is connected with the starter and the generator;
the second battery is respectively connected with the first battery and the generator through the DC/DC converter;
meanwhile, the battery management system BMS is configured to select whether the high-power load is powered by the second battery through the DC/DC converter or the generator according to an operating state of the engine;
and the battery management system BMS is also used for adjusting the power generation amount of the generator when the generator supplies power to the high-power load so as to enable the generator to be matched with the high-power load.
2. The dual power supply circuit for a high power load of claim 1, wherein:
if the engine is in a non-working state, the battery management system BMS is used for controlling the second battery to supply power to the high-power load through the DC/DC converter;
and if the engine is in a working state, the battery management system BMS is used for controlling the generator to supply power to the high-power load through the DC/DC converter.
3. The dual power supply circuit for a high power load of claim 1, wherein:
the battery management system BMS is also used for adjusting the generating capacity of the generator according to the acquired electric quantity information of the first battery and the second battery and the use information of all loads connected to a dual power supply circuit when the generator supplies power to the high-power load through the DC/DC converter.
4. The dual power supply circuit for a high power load of claim 3, further comprising:
and the display is connected with the battery management system BMS and used for displaying the electric quantity information of the first battery and the second battery acquired by the battery management system BMS and the use information of all loads connected to the dual-power-supply circuit.
5. The dual power supply circuit for high power load according to claim 1, wherein the battery management system BMS is further configured to control the second battery to charge the first battery upon determining that the charge level of the first battery is lower than a set charge level.
6. The dual power supply circuit for high power load according to claim 1, wherein the battery management system BMS is provided integrally with the DC/DC converter.
7. The dual power supply circuit for a high power load of claim 1, wherein said first battery comprises a lead storage battery; and/or the second battery comprises a 24V lithium battery; and/or the high power load comprises at least a parking air conditioner.
8. A power supply method of a dual power supply circuit for a high-power load is characterized by comprising the following steps:
providing a dual power supply circuit for a high power load as claimed in any one of claims 1 to 7;
the battery management system BMS selects whether the second battery supplies power to the high-power load through the DC/DC converter or the generator supplies power to the high-power load according to the working state of the engine;
if the generator is selected to supply power to the high-power load, the battery management system BMS adjusts the power generation amount of the generator so that the generator is matched with the high-power load.
9. The method of claim 8, wherein the step of selecting whether the second battery supplies power to the high power load through the DC/DC converter or the generator supplies power to the high power load according to the operating state of the engine comprises:
if the engine is in a non-working state, the battery management system BMS controls the second battery to supply power to the high-power load through the DC/DC converter;
and if the engine is in a working state, the battery management system BMS controls the generator to supply power to the high-power load through the DC/DC converter.
10. The method of claim 8, wherein the step of the battery management system BMS adjusting the power generation of the generator comprises:
and the battery management system BMS adjusts the power generation amount of the generator according to the acquired electric quantity information of the first battery and the second battery and the use information of all loads connected to the dual-power circuit.
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| CN202110601021.9A CN113328491A (en) | 2021-05-31 | 2021-05-31 | Dual-power circuit for high-power load and power supply method thereof |
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| CN202110601021.9A CN113328491A (en) | 2021-05-31 | 2021-05-31 | Dual-power circuit for high-power load and power supply method thereof |
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