CN110789475B - Composite power supply management system and method - Google Patents

Composite power supply management system and method Download PDF

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Publication number
CN110789475B
CN110789475B CN201911013780.2A CN201911013780A CN110789475B CN 110789475 B CN110789475 B CN 110789475B CN 201911013780 A CN201911013780 A CN 201911013780A CN 110789475 B CN110789475 B CN 110789475B
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super capacitor
storage battery
state
voltage value
vehicle
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CN110789475A (en
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谢璞光
郭亚强
郝晓峰
范宇希
柴浩
王素丰
马自刚
郝丽惠
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a composite power supply management system and a method, comprising the following steps: the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit; if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter. According to the invention, the power management unit controls the storage battery and the super capacitor to be connected in series to form the composite power supply, and the storage battery and the super capacitor are connected in series, so that deep discharge of the storage battery can be avoided when a vehicle is started, the voltage of the storage battery cannot be greatly reduced, the service life of the storage battery is prolonged, normal operation of electric appliances on the vehicle is ensured, and meanwhile, compared with a scheme of starting a starter by solely using the super capacitor, the cost is lower.

Description

Composite power supply management system and method
Technical Field
The invention relates to the field of automotive electronics, in particular to a composite power supply management system and method.
Background
The existing fuel oil automobile technology is provided with a 12-volt power supply system, the power supply system comprises a 12-volt storage battery, when an automobile is started, a starter is in a working state by utilizing electric energy stored in the storage battery, and the starter restarts an automobile engine to enable the engine to run in a required working state, so that the starting process of the automobile is completed. In addition, the power supply system can also comprise a 12-volt storage battery and a 12-volt super capacitor which are connected in parallel, and when the automobile is started, the storage battery or the super capacitor is used for starting the engine alone, so that the starting process of the automobile is completed.
However, in the conventional scheme, if the engine is started by using the storage battery alone, the storage battery is deeply discharged due to a large amount of electricity required for starting the vehicle, the voltage of the storage battery is greatly reduced, the service life of the storage battery is damaged, and meanwhile, electrical appliances on the vehicle are dormant or restarted due to insufficient power supply.
Disclosure of Invention
In view of the above, the present invention is directed to a hybrid power management system and method, so as to solve the problems in the prior art that when a battery is used alone to start an engine, the battery is deeply discharged due to a large amount of electric power required to start a vehicle, the battery voltage is greatly reduced, the battery life is damaged, and electrical appliances on the vehicle are in a sleep state or restarted due to insufficient power supply, or the cost of a power system is high when a super capacitor is used alone to start the engine.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a hybrid power management system for use with a vehicle, the system comprising:
the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit;
the positive electrode of the storage battery is connected with the positive electrode of the generator, and the negative electrode of the storage battery is connected with the negative electrode of the generator;
the power management unit is simultaneously connected with the positive electrode of the storage battery, the positive electrode of the super capacitor and the positive electrode of the generator; the cathode of the super capacitor is connected with the body earth of the vehicle; the negative electrode of the storage battery is connected with the vehicle body of the vehicle through the power supply management unit in a bonding mode;
if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter.
Further, in the above-mentioned case,
the system further comprises:
and if the current state of the vehicle is a braking energy recovery state, the power management unit controls the generator to generate power at the maximum power generation voltage and charge the storage battery and the super capacitor.
Further, in the above-mentioned case,
the system further comprises:
if the current state of the vehicle is an awakening state and the voltage value of the super capacitor is smaller than a second preset voltage value, the power management unit controls the storage battery to perform first charging operation on the super capacitor according to a preset time length under the condition that the voltage value of the storage battery is larger than or equal to a third preset voltage value;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the first charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to the second preset voltage value.
Further, in the above-mentioned case,
the system further comprises:
if the current state of the vehicle is a vehicle state, the power management unit controls the generator to perform a second charging operation on the super capacitor according to a preset time length;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the second charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to a fourth preset voltage value.
Further, in the above-mentioned case,
the power management unit comprises a first switch, a second switch, a third switch, a direct current-direct current voltage stabilizer and a control unit;
one end of the first switch is connected with the negative electrode of the storage battery, and the other end of the first switch is connected with a vehicle body grounding of the vehicle;
one end of the second switch is connected with the negative electrode of the storage battery, and the other end of the second switch is simultaneously connected with the positive electrode of the super capacitor and one end of the direct current-direct current voltage stabilizer;
one end of the third switch is connected with the anode of the storage battery and the anode of the generator at the same time, and the other end of the third switch is connected with the other end of the direct current-direct current voltage stabilizer;
one end of the direct current-direct current voltage stabilizer is connected with the other end of the third switch, and the other end of the direct current-direct current voltage stabilizer is simultaneously connected with the anode of the super capacitor and the other end of the second switch;
the control unit is used for receiving the voltage value of the super capacitor, the voltage value and the state of charge value of the storage battery and the current state signal of the vehicle, and controlling the first switch, the second switch, the third switch and the direct current-direct current voltage stabilizer to be switched on or switched off.
Further, in the above-mentioned case,
if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter and comprises the following steps:
the power management unit controls the first switch and the third switch to be switched off, and the second switch is switched on, so that the storage battery and the super capacitor are connected in series to form the composite power supply.
Further, in the above-mentioned case,
if the current state of the vehicle is a braking energy recovery state, the power management unit controls the generator to generate power at the maximum power generation voltage and charges the storage battery and the super capacitor, and the method comprises the following steps:
the power supply management unit controls the second switch to be opened and the first switch to be closed, so that the generator charges the storage battery at the maximum generating voltage;
the power management unit controls the third switch to be closed, so that the generator charges the super capacitor at the maximum generating voltage.
Further, in the above-mentioned case,
if the current state of the vehicle is the wake-up state and the voltage value of the super capacitor is smaller than a second preset voltage value, the power management unit controls the storage battery to perform a first charging operation on the super capacitor according to a preset duration under the condition that the voltage value of the storage battery is larger than or equal to a third preset voltage value, and the step includes:
the power supply management unit controls the second switch to be switched off, and the first switch is switched on, so that the negative electrode of the storage battery is connected with the body of the vehicle in a bonding mode;
and the power management unit controls the third switch to be closed, so that the storage battery performs the first charging operation on the super capacitor according to the preset time length.
Further, in the above-mentioned case,
if the current state of the vehicle is a vehicle landing state, the power management unit controls the generator to perform a second charging operation on the super capacitor according to a preset time length, and the step includes:
the power supply management unit controls the second switch to be switched off and the first switch to be switched on, so that the generator charges the storage battery;
and the power management unit controls the third switch to be closed, so that the generator carries out the second charging operation on the super capacitor according to the preset time length.
A hybrid power management method is applied to the hybrid power management system, and comprises the following steps:
the power supply management unit acquires the current state of the vehicle;
the power management unit acquires a state of charge value and a voltage value of the storage battery;
if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit connects the storage battery and the super capacitor in series to form a composite power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value;
the power management unit starts a starter through the hybrid power supply.
Further, in the above-mentioned case,
after the step of obtaining the current state of the vehicle, the method further comprises:
and if the current state of the vehicle is a braking energy recovery state, the power management unit controls the generator to generate power at the maximum power generation voltage and charge the storage battery and the super capacitor.
Further, in the above-mentioned case,
if the current state of the vehicle is an awakening state and the voltage value of the super capacitor is smaller than a second preset voltage value, the power management unit controls the storage battery to perform first charging operation on the super capacitor according to a preset time length under the condition that the voltage value of the storage battery is larger than or equal to a third preset voltage value;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the first charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to the second preset voltage value.
Further, in the above-mentioned case,
after the step of obtaining the state-of-charge value and the voltage value of the battery, the method further comprises:
if the current state of the vehicle is a vehicle state, the power management unit controls the generator to perform a second charging operation on the super capacitor according to a preset time length;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the second charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to a fourth preset voltage value.
Compared with the prior art, the composite power supply management system and method provided by the invention have the following advantages:
the embodiment of the invention provides a composite power supply management system and a method, comprising the following steps: the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit; the positive pole of the storage battery is connected with the positive pole of the generator, and the negative pole of the storage battery is connected with the negative pole of the generator; the power management unit is simultaneously connected with the anode of the storage battery, the anode of the super capacitor and the anode of the generator; the cathode of the super capacitor is connected with the body of the vehicle in a bonding way; the negative pole of the storage battery is connected with the body of the vehicle through a power management unit; if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter. In the invention, when the engine is in a starting state, the power management unit controls the storage battery and the super capacitor to be connected in series to form a composite power supply to start the starter, so that the engine runs in a required working state to complete the starting process of the automobile.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a hybrid power management system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a hybrid power management method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a hybrid power management method in a non-intelligent startup state according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating steps of a hybrid power management method in an intelligent startup state according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating steps of another hybrid power management method according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating steps of a method for managing a hybrid power supply in an awake state according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating steps of a hybrid power management method in a landing state according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating steps of a hybrid power management method in a braking energy recovery state according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a schematic diagram of a hybrid power management system according to an embodiment of the present invention is shown, applied to a vehicle, where the hybrid power management system 10 includes: a starter S, a battery 20, a super capacitor 30, an engine M, a generator G, and a Power Management Unit (PMU) 40.
The super capacitor, also known as an electrochemical capacitor, an electric double layer capacitor, a gold capacitor and a farad capacitor is an electrochemical element which is developed from the seventh and eighties and stores energy through a polarized electrolyte, is a power supply which is between a traditional capacitor and a battery and has special performance, and mainly stores electric energy by electric double layers and redox pseudocapacitance charges, but does not generate chemical reaction in the energy storage process, and the energy storage process is reversible, and the super capacitor can be repeatedly charged and discharged for tens of thousands of times.
Specifically, in fig. 1, the solid line represents the power or energy flow, and the dashed line represents the control signal and measurement signal flows.
In the embodiment of the present invention, the positive electrode of the battery 20 is connected to the positive electrode of the generator G, the negative electrode of the battery 20 is connected to the negative electrode of the generator G, and the two ends of the engine M are connected to the positive electrode and the negative electrode of the generator G, so that the generator G can charge the battery 20 at a certain voltage after the generator G is driven by the engine M to operate.
Further, the starter S is connected to the positive electrode and the negative electrode of the battery 20 through the starter relay 50, and meanwhile, the starter S is connected to both ends of the engine M through the starter relay 50, so that in the vehicle starting process, under the condition that the starter relay 50 is closed, the battery 20 can provide electric energy for the starter S, the starter S is in a working state, and the starter S drives the flywheel of the engine M to rotate, so that the engine M is started, and the vehicle starting process is completed.
The power management unit 40 is connected to the positive electrode of the battery 20, the negative electrode of the battery 20, the positive electrode of the supercapacitor 30, and the positive electrode of the generator G at the same time.
Optionally, the power management unit 40 may include: a first switch K1, a second switch K2, a third switch K3, a DC-DC voltage stabilizer 41 and a control unit 42. The negative electrode of the storage battery 20 is connected to the metal sheet of the vehicle body through the first switch K1, namely, the storage battery is connected with the vehicle body through grounding, the negative electrode of the storage battery 20 can also be connected to the positive electrode of the super capacitor 30 through the second switch K2, the negative electrode of the super capacitor 30 is connected to the metal sheet of the vehicle body, namely, the storage battery is connected with the vehicle body through grounding, and therefore grounding is completed, and the process realizes the series connection of the storage battery 20 and the super capacitor 30.
In addition, the positive electrode of the storage battery 20 is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage regulator 41, and the negative electrode of the super capacitor 30 is connected to the sheet metal of the vehicle body, i.e. is grounded, so that grounding is completed, and the process realizes the parallel connection of the storage battery 20 and the super capacitor 30.
In the embodiment of the invention, the storage battery and the super capacitor in the hybrid power management system are energy storage devices, and when the storage battery of the vehicle fails, the super capacitor can be used as an emergency backup battery of the vehicle, so that the life safety of passengers on the vehicle is guaranteed when the storage battery fails.
In the embodiment of the invention, the composite power management system supports a Local Interconnect Network (LIN), a Controller Area Network (CAN) and other communication protocols, so that the control unit CAN determine a suitable composite power management method of the composite power management system according to the charge state value of the storage battery, the voltage value of the storage battery, the current state of the vehicle and the like.
Specifically, the Control Unit may acquire a current state of the vehicle through an Electronic Control Unit (ECU) of the engine and ECUs of other electrical modules on the vehicle, and the ECU of the engine collects working state information of each part of the engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor, and the like) and analyzes the working state information of each part of the engine, so as to obtain information about a state of each part of the engine, a running condition, and the like.
For example, if the vehicle power supply mode is in an OFF mode and enters a vehicle network sleep state, the current state of the vehicle is in the sleep state; if the power supply mode of the whole vehicle is in an ON mode and the rotating speed of an engine is 0 rpm, the current state of the vehicle is in an awakening state; if the vehicle is started by 'one-key starting of the vehicle' or turning a key of the vehicle, the current state of the vehicle is a non-intelligent starting state; the engine ECU can acquire the operation information of a driver (such as stepping on a brake pedal until the driver stops) through various sensors and switches so as to judge the stopping intention of the driver, the engine stalls under the condition that the condition of the whole vehicle meets all other judgment conditions of stopping the engine, when the driver needs to continue driving, the brake pedal is released by the driver, the engine is immediately started at the moment, if the gear of the vehicle is placed in a P gear before, the engine is immediately started when the gear of the vehicle is placed in a D gear, and at the moment, the current state of the vehicle is an intelligent starting state; if the engine of the vehicle is in the running state, the current state of the vehicle is the landing state; if the engine of the vehicle is in a running state, the vehicle brake switch is in a closed state, and the running speed of the vehicle is greater than 0 kilometer per hour, the current state of the vehicle is a brake energy recovery state.
In addition, the control unit can acquire information such as a state of charge value and a voltage value of the storage battery through a storage battery Sensor (EBS), the EBS has a small volume, various parameters such as temperature, current and voltage of the storage battery can be accurately measured and monitored, and the state of charge value and remaining time of the storage battery can be calculated.
In the embodiment of the invention, if the control unit detects that the current state of the vehicle is the dormant state, the control unit indicates that the vehicle does not need to be started at the moment and does not need to supply power to electric devices on the vehicle, so that the power management unit is in the non-working state. At this time, the first switch in the power management unit is in a closed state, and the second switch and the third switch are in an open state.
Optionally, if the control unit detects that the current state of the vehicle is the wake-up state, further, a suitable hybrid power management method of the hybrid power management system may be determined according to the voltage value of the storage battery and the voltage value of the super capacitor.
Specifically, referring to fig. 1, the control unit 42 obtains the voltage value of the storage battery 20 from the EBS, obtains the voltage value of the super capacitor 30 from the super capacitor 30, and if the voltage value of the super capacitor 30 is smaller than the second preset voltage value and the voltage value of the storage battery 20 is greater than or equal to the third preset voltage value, the control unit 42 may control the storage battery 20 to perform the first charging operation on the super capacitor 30. This is because when the engine M is in the wake-up state, the battery 20 does not provide energy to start the vehicle, but needs to provide energy to the electrical equipment in the vehicle, which is in the working state at this time, for example, when the engine M is in the wake-up state, the lighting, sound, air conditioner and other equipment on the vehicle still need certain energy to maintain the working state, and at this time, the battery 20 is in the process of continuously consuming the electric quantity, so after the engine M is detected to be in the wake-up state, if the electric quantity of the battery 20 is sufficient (i.e. the voltage value of the battery 20 is greater than or equal to the third preset voltage value) and the electric quantity of the super capacitor 30 is insufficient (i.e. the voltage value of the super capacitor 30 is less than the second preset voltage value), the control unit 42 may control the battery 20 to perform the first charging operation on the super capacitor 30 according to the preset time length, so as to, the charge in the battery 20 is stored in the super capacitor 30 to ensure that there is sufficient charge to start the vehicle.
Preferably, the second preset voltage value may be a fixed voltage value, and may be determined according to the actual situation of the whole vehicle, such as: 4 volts, the third preset voltage value may also be a fixed voltage value, and may be determined according to the actual conditions of the whole vehicle, such as: 12.4 volts.
Referring to fig. 1, the first charging operation is: the control unit 42 controls the first switch K1 and the third switch K3 to be closed, the second switch K2 to be open, at this time, the negative electrode of the storage battery 20 is connected to the metal sheet connected to the vehicle body, namely, the vehicle body through the first switch K1, so that grounding is achieved, the positive electrode of the storage battery 20 is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage stabilizer 41, and the negative electrode of the super capacitor 30 is connected to the metal sheet connected to the vehicle body, namely, the vehicle body through, so that grounding is achieved, so that the storage battery 20 can perform the first charging operation on the super capacitor 30. Since the storage battery 20 and the super capacitor 30 are dc power supplies with different voltage levels, a dc-dc voltage stabilizer 41 needs to be disposed between the storage battery 20 and the super capacitor 30 to realize electric energy conversion between the dc power supplies with different voltage levels.
In the embodiment of the present invention, the first charging operation is to charge the super capacitor by the storage battery according to a preset time duration, where the preset time duration may be a fixed time value, and may be determined according to an actual situation of the super capacitor, for example: for 30 seconds. This is because the super capacitor can store a small amount of electricity and can be fully charged in a short period of time. After the storage battery is charged to the super capacitor according to the preset time length, the power management unit detects the current voltage value of the super capacitor, if the current voltage value of the super capacitor is larger than or equal to a second preset voltage value at the moment, the first charging operation is completed, the super capacitor is not charged any more, if the current voltage value of the super capacitor is smaller than the second preset voltage value at the moment, the super capacitor is charged again according to the preset time length until the current voltage value of the super capacitor is larger than or equal to the second preset voltage value.
In addition, after the current voltage value of the super capacitor is detected to be larger than or equal to the second preset voltage value, the storage battery can be controlled not to charge the super capacitor any more by opening the third switch and/or opening the direct current-direct current voltage regulator.
Optionally, if the control unit detects that the current state of the vehicle is the landing state, further, a suitable composite power management method of the composite power management system may be determined according to the voltage value of the super capacitor.
Specifically, referring to fig. 1, in a case where the current state of the engine M is the landing state, the control unit 42 may control the generator G to perform a second charging operation on the super capacitor 30, and at this time, since the engine M of the vehicle is in the running state, the engine M may drive the generator G to operate, so that the generator G is in the working state, and thus the generator G in the working state may charge the super capacitor 30, and in addition, the generator G in the working state may also charge the battery 20.
Referring to fig. 1, the positive electrode of the battery 20 is connected to the positive electrode of the generator G, and the negative electrode of the battery 20 is connected to the negative electrode of the generator G, so that the generator G continues to charge the battery 20 until the battery 20 is fully charged when the generator G is in an operating state and the operating voltage of the generator G is greater than the voltage of the battery 20. Meanwhile, the generator G in the working state also performs a second charging operation on the super capacitor 30, where the second charging operation is: the control unit 42 controls the first switch K1 and the third switch K3 to be closed, the second switch K2 to be open, at this time, the negative electrode of the generator G is connected to the metal sheet of the vehicle body through the first switch K1, that is, connected to the vehicle body ground, so as to achieve the ground, the positive electrode of the generator G is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage stabilizer 41, and the negative electrode of the super capacitor 30 is connected to the metal sheet of the vehicle body, that is, connected to the vehicle body ground, so as to achieve the ground, so that the generator G can perform the second charging operation on the super capacitor 30. Since the generator G and the super capacitor 30 are dc power supplies with different voltage levels, a dc-dc voltage stabilizer 41 needs to be disposed between the generator G and the super capacitor 30 to realize electric energy conversion between the dc power supplies with different voltage levels.
In the embodiment of the present invention, the second charging operation is that the generator charges the super capacitor according to a preset time duration, where the preset time duration may be a fixed time value, and may be determined according to an actual situation of the super capacitor, for example: for 30 seconds. This is because the super capacitor can store a small amount of electricity and can be fully charged in a short period of time. And after the super capacitor is charged according to the preset time length, the power management unit detects the current voltage value of the super capacitor, if the current voltage value of the super capacitor is greater than or equal to a fourth preset voltage value at the moment, the second charging operation is completed, the super capacitor is not charged, if the current voltage value of the super capacitor is less than the fourth preset voltage value at the moment, the super capacitor is charged again according to the preset time length until the current voltage value of the super capacitor is greater than or equal to the fourth preset voltage value.
In addition, after the current voltage value of the super capacitor is detected to be greater than or equal to the fourth preset voltage value, the generator can be controlled not to charge the super capacitor any more by opening the third switch and/or opening the direct current-direct current voltage regulator.
Preferably, the fourth preset voltage value may be a fixed voltage value, and may be determined according to actual conditions of the whole vehicle, such as: 5 volts.
Optionally, if the control unit detects that the current state of the vehicle is the intelligent starting state or the non-intelligent starting state, that is, the current state of the vehicle is the starting state, further, a suitable hybrid power management method of the hybrid power management system may be determined according to the state of charge value and the voltage value of the storage battery.
Specifically, the control unit acquires the state of charge value and the voltage value of the storage battery from the EBS, firstly judges whether the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, and if the state of charge value of the storage battery is larger than the preset state of charge value, the storage battery can be determined to be sufficient in electric quantity, and the starter can be started by independently depending on the electric quantity stored in the storage battery.
Referring to fig. 1, the process of starting the starter S solely by means of the amount of electricity stored in the battery 20 is: the control unit 42 controls the second switch K2 and the third switch K3 to be opened, the first switch K1 is closed, at this time, the starting relay 50 is closed, the positive electrode of the battery 20 is connected with one end of the starter S, the negative electrode of the battery 20 is connected with the other end of the starter S, and the negative electrode of the battery 20 is connected to a metal sheet of the vehicle body through the first switch K1, namely, is connected with the vehicle body through bonding, so that the battery 20 supplies electric energy to the starter S to start the starter S, the starter S is in a working state, the starter S drives the engine M to rotate again, the engine M is started, and the starting process of the vehicle is completed.
Preferably, the preset state of charge value may be a fixed state of charge value, such as: 60 percent.
If the soc value of the battery 20 is less than or equal to the predetermined soc value, it may be determined that the battery 20 is not charged enough, the starter S is started by the battery 20 alone, and the engine M is started, or when the starter S is started by the battery 20 alone, the battery is deeply discharged to damage the life of the battery, and the electrical devices on the vehicle are caused to be dormant or restarted due to insufficient power supply.
At this time, it may be further determined whether the voltage value of the battery 20 is less than or equal to the first preset voltage value, and if the voltage value of the battery 20 is less than or equal to the first preset voltage value, the control unit 42 controls the first switch K1 and the third switch K3 to be opened, and the second switch K2 to be closed, so that the battery 20 and the super capacitor 30 are connected in series to form a hybrid power source for starting the starter S and supplying power to the electric devices for the upper portion of the vehicle during the starting process. Therefore, the problem that the storage battery cannot provide electric energy for normal work for electric devices on the vehicle to cause restarting of the electric devices on the vehicle due to the fact that the storage battery is pulled down in the starting process of the vehicle can be solved.
Specifically, the negative electrode of the battery 20 is connected to the positive electrode of the super capacitor 30 through the second switch K2, the negative electrode of the super capacitor 30 is connected to a metal sheet of the vehicle body, that is, is connected to the vehicle body by bonding, so that the battery 20 and the super capacitor 30 are connected in series to form a hybrid power supply, the starter relay 50 is further closed, the hybrid power supply provides electric energy to the starter S to start the starter S, the starter S is in a working state, the starter S drives the engine M to rotate, the engine M is started, and the starting process of the vehicle is completed.
Optionally, the super capacitor can be replaced by a common lead-acid battery or a lithium battery.
Preferably, the first preset voltage value may be a fixed voltage value, such as: 10 volts.
In the embodiment of the invention, the hybrid power management system is applied to a vehicle with a 12-volt power system, the rated voltage of a commonly used storage battery is 12 volts, the rated voltage of a super capacitor is 6 volts, and the working voltage range of electric devices on the vehicle is 6-16 volts, so that after the step of judging that the state of charge value of the storage battery is less than or equal to the preset state of charge value, before the storage battery and the super capacitor are connected in series to form the hybrid power, whether the voltage value of the storage battery is less than or equal to a first preset voltage value needs to be further judged, if the voltage value of the storage battery is greater than the first preset voltage value, wherein the first preset voltage value is 10 volts, at this time, if the storage battery and the super capacitor are connected in series to form the hybrid power, the voltage value of the hybrid power is greater than 16 volts, namely, the voltage value of the hybrid power exceeds the working voltage range of the electric devices on, the electric equipment on the vehicle can be damaged, and the electric equipment on the vehicle can comprise equipment such as lighting, sound equipment, an air conditioner and the like on the vehicle, so that after the step of judging that the state of charge value of the storage battery is smaller than or equal to the preset state of charge value, whether the voltage value of the storage battery is smaller than or equal to a first preset voltage value or not must be further determined, only when the voltage value of the storage battery is smaller than or equal to the first preset voltage value, the storage battery and the super capacitor can be connected in series to form a compound power supply, and the compound power supply is utilized to start a starter and supply power to partial electric equipment on the vehicle.
Optionally, if the control unit detects that the current state of the vehicle is a braking energy recovery state, further, a suitable composite power management method of the composite power management system may be determined according to the voltage value of the super capacitor.
Specifically, referring to fig. 1, in the case where the current state of the engine M is the braking energy recovery state, the control unit 42 may control the generator G to charge the battery 20 and the super capacitor 30 with the maximum generated voltage, and at this time, since the engine M of the vehicle is in the braking energy recovery state, in order to improve the recovery efficiency, the generator G is charged to the battery 20 and the super capacitor 30 with the maximum generated voltage, thereby reducing energy consumption.
In addition, when the current state of the engine M is the braking energy recovery state, the torque of the generator G is maximized when the generator G is operated at the maximum generation voltage, so that a certain braking effect can be exerted.
In the embodiment of the invention, the hybrid power management system is applied to a vehicle with a 12-volt power system, the rated voltage of a common storage battery is 12 volts, the rated voltage of a super capacitor is 6 volts, the rated voltage of a generator is 14 volts, and the maximum generating voltage of the generator is 15 volts.
Referring to fig. 1, the positive electrode of the battery 20 is connected to the positive electrode of the generator G, and the negative electrode of the battery 20 is connected to the negative electrode of the generator G, so that the generator G continues to charge the battery 20 until the battery 20 is fully charged when the generator G operates at the maximum power generation voltage and the operating voltage of the generator G is greater than the voltage of the battery 20. Meanwhile, the generator G working at the maximum generation voltage also charges the super capacitor 30, and the specific process is as follows: the control unit 42 controls the first switch K1 and the third switch K3 to be closed, the second switch K2 to be open, at this time, the negative electrode of the generator G is connected to the metal sheet of the vehicle body through the first switch K1, namely, is grounded to the vehicle body, the positive electrode of the generator G is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage stabilizer 41, the negative electrode of the super capacitor 30 is connected to the metal sheet of the vehicle body, namely, is grounded to the vehicle body, and thus the generator G can charge the super capacitor 30 with the maximum generating voltage. Since the generator G and the super capacitor 30 are dc power supplies with different voltage levels, a dc-dc voltage stabilizer 41 needs to be disposed between the generator G and the super capacitor 30 to realize electric energy conversion between the dc power supplies with different voltage levels.
In the embodiment of the invention, the operation of charging the super capacitor by the generator working at the maximum generating voltage is that the generator continuously charges the super capacitor in the primary braking process of the vehicle, because the charging voltage is lower at the moment, dangerous events such as explosion of the super capacitor due to overcharging and the like can not be caused, and the electric quantity can be automatically stopped continuously obtaining from the generator after the super capacitor is fully charged, so that the current voltage value of the super capacitor is detected only after the primary braking of the vehicle is finished, if the current voltage value of the super capacitor after the primary braking of the vehicle is finished is greater than or equal to a fifth preset voltage value, the charging process of the super capacitor is finished, the super capacitor is not charged again when the vehicle is braked next time, if the current voltage value of the super capacitor after the primary braking of the vehicle is finished is less than the fifth preset voltage value, when the vehicle is braked next time, the generator continues to operate at the maximum generation voltage to charge the super capacitor.
Preferably, the fifth preset voltage value may be a fixed voltage value, and may be determined according to actual conditions of the whole vehicle, such as: 6 volts.
To sum up, the composite power management system provided in the embodiment of the present invention includes: the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit; the positive pole of the storage battery is connected with the positive pole of the generator, and the negative pole of the storage battery is connected with the negative pole of the generator; the power management unit is simultaneously connected with the anode of the storage battery, the anode of the super capacitor and the anode of the generator; the cathode of the super capacitor is connected with the body of the vehicle in a bonding way; the negative pole of the storage battery is connected with the body of the vehicle through a power management unit; if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter. In the embodiment of the invention, when the engine is in a starting state, the power management unit controls the storage battery and the super capacitor to be connected in series to form the composite power supply to start the starter, so that the engine runs in a required working state to complete the starting process of the automobile.
On the basis of the above embodiment, the embodiment of the invention also provides a composite power supply management method.
Referring to fig. 2, a flowchart illustrating steps of a hybrid power management method according to an embodiment of the present invention is shown.
In step 101, the power management unit obtains the current state of the vehicle.
In the embodiment of the invention, the composite power management system supports LIN, CAN and other communication protocols, so that a power management unit in the composite power management system CAN acquire the current state of a vehicle through an engine ECU and ECUs of other electrical appliance modules on the vehicle, the engine ECU collects working state information of each part of an engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor and the like) and analyzes the working state information of each part of the engine, and therefore, information of the function of each part of the engine, the running condition and the like CAN be obtained.
For example, if the vehicle power supply mode is in an OFF mode and enters a vehicle network sleep state, the current state of the vehicle is in the sleep state; if the power supply mode of the whole vehicle is in an ON mode and the rotating speed of an engine is 0 rpm, the current state of the vehicle is in an awakening state; if the vehicle is started by 'one-key starting of the vehicle' or turning a key of the vehicle, the current state of the vehicle is a non-intelligent starting state; the engine ECU can acquire the operation information of a driver (such as stepping on a brake pedal until the driver stops) through various sensors and switches so as to judge the stopping intention of the driver, the engine stalls under the condition that the condition of the whole vehicle meets all other judgment conditions of stopping the engine, when the driver needs to continue driving, the brake pedal is released by the driver, the engine is immediately started at the moment, if the gear of the vehicle is placed in a P gear before, the engine is immediately started when the gear of the vehicle is placed in a D gear, and at the moment, the current state of the vehicle is an intelligent starting state; if the engine of the vehicle is in the running state, the current state of the vehicle is the landing state; if the engine of the vehicle is in a running state, the vehicle brake switch is in a closed state, and the running speed of the vehicle is greater than 0 kilometer per hour, the current state of the vehicle is a brake energy recovery state.
And 102, the power management unit acquires a state of charge value and a voltage value of the storage battery.
In the embodiment of the invention, the composite power management system supports LIN, CAN and other communication protocols, so that a power management unit in the composite power management system CAN acquire information such as a charge state value, a voltage value and the like of the storage battery through the storage battery EBS, the storage battery EBS has a small volume, CAN accurately measure and monitor various parameters such as temperature, current, voltage and the like of the storage battery, and CAN calculate the charge state value and the residual time of the storage battery.
Step 103, if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit connects the storage battery and the super capacitor in series to form a composite power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value.
Referring to fig. 3, a flowchart illustrating steps of a hybrid power management method in a non-intelligent startup state according to an embodiment of the present invention is shown.
Optionally, referring to fig. 3, in an implementation manner of the embodiment of the present invention, step 103 may specifically include:
and a substep 1031, determining whether the current state of the vehicle is a non-intelligent starting state.
In this step, the power management unit in the hybrid power management system may acquire the current state of the vehicle through the engine ECU and the ECUs of other electrical modules on the vehicle, and the engine ECU collects the operating state information of each part of the engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor, and the like) and analyzes the operating state information of each part of the engine, so that information about what functions of each part of the engine are, how the operating condition is, and the like may be obtained, thereby determining whether the current state of the vehicle is the non-intelligent starting state.
Specifically, if the current state of the vehicle is a non-smart start state, substep 1033 is performed, and if the current state of the vehicle is not a non-smart start state, substep 1032 is performed.
Sub-step 1032, performing other steps based on the current state of the vehicle.
In this step, if the current state of the vehicle is not the non-intelligent starting state, other steps are performed according to the current state of the vehicle.
And substep 1033, determining whether the state of charge value of the battery is less than or equal to a predetermined state of charge value.
In the step, the control unit detects that the current state of the vehicle is a non-intelligent starting state, namely the current state of the vehicle is a starting state, and determines a proper hybrid power management method of the hybrid power management system according to the state of charge value and the voltage value of the storage battery.
Specifically, the control unit obtains the state of charge value of the storage battery from the storage battery EBS, and determines whether the state of charge value of the storage battery is less than or equal to a preset state of charge value, if the state of charge value of the storage battery is greater than the preset state of charge value, sub-step 1034 is performed, and if the state of charge value of the storage battery is less than or equal to the preset state of charge value, sub-step 1035 is performed.
Substep 1034, the battery individually starts the starter.
In the step, the control unit acquires the state of charge value of the storage battery from the storage battery EBS, and judges that the state of charge value of the storage battery is greater than the preset state of charge value, so that the electric quantity of the storage battery can be determined to be sufficient, and the starter can be started by independently depending on the electric quantity stored by the storage battery.
Preferably, the preset state of charge value may be a fixed state of charge value, such as: 60 percent.
Referring to fig. 1, the process of starting the starter S solely by means of the amount of electricity stored in the battery 20 is: the control unit 42 controls the second switch K2 and the third switch K3 to be opened, the first switch K1 is closed, at this time, the starting relay 50 is closed, the positive electrode of the battery 20 is connected with one end of the starter S, the negative electrode of the battery 20 is connected with the other end of the starter S, and the negative electrode of the battery 20 is connected to a metal sheet of the vehicle body through the first switch K1, namely, is connected with the vehicle body through bonding, so that the battery 20 supplies electric energy to the starter S to start the starter S, the starter S is in a working state, the starter S drives the engine M to rotate again, the engine M is started, and the starting process of the vehicle is completed.
And sub-step 1035 of whether the voltage value of the battery is less than or equal to a first preset voltage value.
In the step, the control unit acquires the state of charge value of the storage battery from the storage battery EBS, and judges that the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, so that the situation that the electric quantity of the storage battery is insufficient can be determined, the starter is started by only depending on the stored electric quantity of the storage battery, and the starting of the engine is finished, or when the starter is started by only depending on the storage battery, on one hand, the deep discharge of the storage battery can be caused to damage the service life of the storage battery, and on the other hand, electrical equipment on the vehicle can be dormant or restarted due to insufficient power supply.
At this time, it may be further determined whether the voltage value of the battery is less than or equal to the first preset voltage value, and if the voltage value of the battery is greater than the first preset voltage value, sub-step 1036 is performed, and if the voltage value of the battery is less than or equal to the first preset voltage value, sub-step 1037 is performed.
Preferably, the first preset voltage value may be a fixed voltage value, such as: 10 volts.
Substep 1036 of maintaining this state, without starting the starter using the battery and the super capacitor.
In this step, the control unit obtains a voltage value of the storage battery from the storage battery EBS, and determines that the voltage value of the storage battery is greater than a first preset voltage value, which may indicate that, if the storage battery and the super capacitor are connected in series to form a hybrid power supply, and the hybrid power supply starts a starter and supplies power to electrical devices on the vehicle, the voltage value of the hybrid power supply may exceed an operating voltage range of the electrical devices on the vehicle, so as to damage the electrical devices on the vehicle, and the electrical devices on the vehicle may include devices such as lighting, sound, and air conditioner on the vehicle.
In the embodiment of the invention, the hybrid power management system is applied to a vehicle with a 12-volt power system, the rated voltage of a commonly used storage battery is 12 volts, the rated voltage of a super capacitor is 6 volts, and the working voltage range of electric devices on the vehicle is 6-16 volts, so that after the step of judging that the state of charge value of the storage battery is less than or equal to the preset state of charge value, before the storage battery and the super capacitor are connected in series to form the hybrid power, whether the voltage value of the storage battery is less than or equal to a first preset voltage value needs to be further judged, if the voltage value of the storage battery is greater than the first preset voltage value, wherein the first preset voltage value is 10 volts, at this time, if the storage battery and the super capacitor are connected in series to form the hybrid power, the voltage value of the hybrid power is greater than 16 volts, namely, the voltage value of the hybrid power exceeds the working voltage range of the electric devices on, the electric equipment on the vehicle can be damaged, and the electric equipment on the vehicle can comprise equipment such as lighting, sound equipment, an air conditioner and the like on the vehicle, so that after the step of judging that the state of charge value of the storage battery is smaller than or equal to the preset state of charge value, whether the voltage value of the storage battery is smaller than or equal to a first preset voltage value or not must be further determined, only when the voltage value of the storage battery is smaller than or equal to the first preset voltage value, the storage battery and the super capacitor can be connected in series to form a compound power supply, and the compound power supply is utilized to start a starter and supply power to partial electric equipment on the vehicle.
And a substep 1037 of opening the first switch and the third switch, closing the second switch, and connecting the storage battery and the super capacitor in series to form the composite power supply.
In the step, the control unit acquires a voltage value of the storage battery from the storage battery EBS, and judges that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, at the moment, the control unit controls the first switch and the third switch to be switched off, and the second switch is switched on, so that the storage battery and the super capacitor are connected in series to form a composite power supply to start a starter, and power is supplied to partial electric devices on the vehicle in the starting process. Therefore, the problem that the storage battery cannot provide electric energy for normal work for electric devices on the vehicle to cause restarting of the electric devices on the vehicle due to the fact that the storage battery is pulled down in the starting process of the vehicle can be solved.
Specifically, referring to fig. 1, the negative electrode of the battery 20 is connected to the positive electrode of the super capacitor 30 through the second switch K2, the negative electrode of the super capacitor 30 is connected to a metal sheet of the vehicle body, i.e., is connected to the vehicle body via a ground, so that the battery 20 and the super capacitor 30 are connected in series to form a hybrid power supply, and further the starting relay 50 is closed, so that the hybrid power supply provides electric energy to the starter S to start the starter S, so that the starter S is in a working state, and the starter S drives the engine M to rotate, thereby starting the engine M and completing the starting process of the vehicle.
Referring to fig. 4, a flowchart illustrating steps of a hybrid power management method in an intelligent startup state according to an embodiment of the present invention is shown.
Optionally, referring to fig. 4, in another implementation manner of the embodiment of the present invention, step 103 may specifically include:
substep 1038, whether the current state of the vehicle is a smart start state.
In this step, the power management unit in the hybrid power management system may obtain the current state of the vehicle through the engine ECU and the ECUs of other electrical modules on the vehicle, and the engine ECU collects the operating state information of each part of the engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor, and the like) and analyzes the operating state information of each part of the engine, so that information about what functions of each part of the engine are, how the operating condition is, and the like may be obtained, thereby determining that the current state of the vehicle is the non-intelligent starting state.
Specifically, if the current state of the vehicle is the smart start state, substep 10310 is performed, and if the current state of the vehicle is not the smart start state, substep 1039 is performed.
A sub-step 1039 of performing other steps depending on the current state of the vehicle.
In this step, if the current state of the vehicle is not the smart start state, other steps are performed according to the current state of the vehicle.
And a substep 10310, determining whether the state of charge value of the storage battery is less than or equal to a preset state of charge value.
In this step, the control unit detects that the current state of the vehicle is an intelligent starting state, that is, the current state of the vehicle is a starting state, and determines an appropriate hybrid power management method of the hybrid power management system according to the state of charge value and the voltage value of the storage battery.
Specifically, the control unit obtains a state of charge value of the storage battery from the storage battery EBS, and determines whether the state of charge value of the storage battery is less than or equal to a preset state of charge value, if the state of charge value of the storage battery is greater than the preset state of charge value, sub-step 10311 is performed, and if the state of charge value of the storage battery is less than or equal to the preset state of charge value, sub-step 10312 is performed.
And substep 10311, the storage battery individually starts the starter.
This step may specifically refer to substep 1034 described above, which is not described herein again.
And substep 10312, determining whether the voltage value of the storage battery is less than or equal to a first preset voltage value.
This step can be referred to specifically as substep 1035 described above and will not be described here.
And a substep 10313 of maintaining this state, starting the starter without using the secondary battery and the super capacitor.
This step may specifically refer to sub-step 1036, which is not described herein.
And in the substep 10314, the first switch and the third switch are opened, the second switch is closed, and the storage battery and the super capacitor are connected in series to form the composite power supply.
This step can be referred to specifically as substep 1037 described above and will not be described herein.
And 104, starting the starter by the power management unit through the hybrid power supply.
Optionally, referring to fig. 3, in an implementation manner of the embodiment of the present invention, step 104 may specifically include:
substep 1041, starting the starter by the hybrid power supply.
In the step, a composite power supply consisting of a storage battery and a super capacitor is adopted to provide electric energy for the starter so as to start the starter, so that the starter is in a working state, and then the starter drives the engine to rotate, so that the starting of the engine is realized, and the starting process of the vehicle is finished.
Substep 1042, whether the engine is started.
In this step, the power management unit in the hybrid power management system may obtain various operating state parameters of the engine through the engine ECU to determine whether the engine is started, for example, when the rotation speed of the engine is greater than a preset rotation speed, it may be determined that the engine is started.
Further, if the engine is started, substep 1043 is executed, and if the engine is not started, substep 1031 is repeatedly executed.
In sub-step 1043, the start-up procedure is completed, the second switch is opened and the first switch is closed.
In this step, the engine has started, i.e. the starting process is finished, and thus the control power management unit may control the first switch to be closed, the second switch and the third switch to be opened, the connection between the battery and the super capacitor to be disconnected, and the supply of electric power to the starter to be stopped.
Optionally, referring to fig. 4, in another implementation manner of the embodiment of the present invention, step 104 may specifically include:
substep 1044 of starting the starter by the hybrid power source.
In the step, a composite power supply consisting of a storage battery and a super capacitor is adopted to provide electric energy for the starter so as to start the starter, so that the starter is in a working state, and then the starter drives the engine to rotate, so that the starting of the engine is realized, and the starting process of the vehicle is finished.
Substep 1045, whether the engine is started.
In this step, the power management unit in the hybrid power management system may obtain various operating state parameters of the engine through the engine ECU to determine whether the engine is started, for example, when the rotation speed of the engine is greater than a preset rotation speed, it may be determined that the engine is started.
Further, if the engine is started, substep 1046 is executed, and if the engine is not started, substep 1047 is executed.
In sub-step 1046, the start-up process is completed, the second switch is opened, and the first switch is closed.
In this step, the engine has started, i.e. the starting process is finished, and thus the control power management unit may control the first switch to be closed, the second switch and the third switch to be opened, the connection between the battery and the super capacitor to be disconnected, and the supply of electric power to the starter to be stopped.
Substep 1047, performing an unintelligent startup procedure
In this step, the engine is not started, and the power management unit performs a non-intelligent starting process as described in fig. 3.
In summary, the composite power management method provided in the embodiment of the present invention includes: the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit; the positive pole of the storage battery is connected with the positive pole of the generator, and the negative pole of the storage battery is connected with the negative pole of the generator; the power management unit is simultaneously connected with the anode of the storage battery, the anode of the super capacitor and the anode of the generator; the cathode of the super capacitor is connected with the body of the vehicle in a bonding way; the negative pole of the storage battery is connected with the body of the vehicle through a power management unit; if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter. In the embodiment of the invention, when the engine is in a starting state, the power management unit controls the storage battery and the super capacitor to be connected in series to form the composite power supply to start the starter, so that the engine runs in a required working state to complete the starting process of the automobile.
Referring to fig. 5, a flowchart illustrating steps of another hybrid power management method according to an embodiment of the present invention is shown.
In step 201, the power management unit obtains the current state of the vehicle.
This step may specifically refer to step 101 described above.
It should be noted that, if the current state of the vehicle is the start state, step 203 is executed after step 202, if the current state of the vehicle is the wake state, step 205 is executed after step 202, if the current state of the vehicle is the landing state, step 208 is executed after step 202, and if the current state of the vehicle is the braking energy recovery state, step 211 is executed after step 201.
Step 202, the power management unit acquires a state of charge value and a voltage value of the storage battery.
This step may specifically refer to step 102, which is not described herein again.
Step 203, if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit connects the storage battery and the super capacitor in series to form a composite power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value.
This step may specifically refer to step 103, which is not described herein again.
Step 204, the power management unit starts the starter through the hybrid power supply.
This step may specifically refer to step 104, which is not described herein again.
Step 205, if the current state of the vehicle is the wake-up state and the voltage value of the super capacitor is smaller than the second preset voltage value, the power management unit controls the storage battery to perform a first charging operation on the super capacitor according to a preset duration under the condition that the voltage value of the storage battery is greater than or equal to a third preset voltage value.
Referring to fig. 6, a flowchart illustrating steps of a hybrid power management method in an awake state according to an embodiment of the present invention is shown.
Optionally, referring to fig. 6, step 205 may specifically include:
sub-step 2051, whether the current state of the vehicle is a wake-up state.
In this step, the power management unit in the hybrid power management system may acquire the current state of the vehicle through the engine ECU and the ECUs of other electrical modules on the vehicle, and the engine ECU collects the operating state information of each part of the engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor, and the like) and analyzes the operating state information of each part of the engine, so that information about what functions of each part of the engine are, how the operating condition is, and the like may be obtained, thereby determining whether the current state of the vehicle is the wake-up state.
Specifically, if the current state of the vehicle is the awake state, substep 2053 is performed, and if the current state of the vehicle is not the awake state, substep 2052 is performed.
Substep 2052, based on the current state of the vehicle, performs other steps.
In this step, if the current state of the vehicle is not the awake state, other steps are performed according to the current state of the vehicle.
And in substep 2053, whether the voltage level of the super capacitor is less than a second predetermined voltage level.
In this step, the control unit detects that the current state of the vehicle is the wake-up state, and determines an appropriate hybrid power management method of the hybrid power management system according to the voltage value of the storage battery and the voltage value of the super capacitor.
Specifically, the control unit in the power management unit obtains the voltage value of the super capacitor from the super capacitor, and determines whether the voltage value of the super capacitor is smaller than a second preset voltage value, if the voltage value of the super capacitor is smaller than the second preset voltage value, sub-step 2054 is executed, and if the voltage value of the super capacitor is larger than the second preset voltage value, sub-step 2056 is executed.
And substep 2054, whether the voltage value of the accumulator is greater than or equal to a third preset voltage value.
In this step, if the voltage value of the super capacitor is smaller than the second preset voltage value, it may be determined that the electric quantity stored in the super capacitor is less at this time and charging is required.
Further, the control unit in the power management unit obtains the voltage value of the battery from the battery EBS, and determines whether the voltage value of the battery is greater than or equal to a third preset voltage value, if the voltage value of the battery is greater than or equal to the third preset voltage value, sub-step 2055 is performed, and if the voltage value of the battery is less than the third preset voltage value, sub-step 2056 is performed.
In sub-step 2055, the first switch and the third switch are closed, the second switch is opened, and the storage battery performs a first charging operation on the super capacitor according to a preset duration.
In this step, the voltage value of the super capacitor is smaller than the second preset voltage value, and the voltage value of the storage battery is greater than or equal to the third preset voltage value, at this time, the control unit may control the storage battery to perform the first charging operation on the super capacitor. This is because when the engine is in the wake-up state, the storage battery does not need to provide energy to start the vehicle, but needs to provide energy to the electrical equipment in the working state at this time on the vehicle, for example, when the engine is in the wake-up state, the lighting, sound, air conditioning and other equipment on the vehicle still need certain energy to maintain the working state, and the storage battery is in the process of continuously consuming the electric quantity at this time, so after the engine is detected to be in the wake-up state, if the electric quantity of the storage battery is sufficient (i.e. the voltage value of the storage battery is greater than or equal to the third preset voltage value) and the electric quantity of the super capacitor is insufficient (i.e. the voltage value of the super capacitor is less than the second preset voltage value), the control unit can control the storage battery to perform the first charging operation to the super capacitor according to the preset time, first, it is ensured that the super capacitor has sufficient charge to start the vehicle.
Preferably, the second preset voltage value may be a fixed voltage value, and may be determined according to the actual situation of the whole vehicle, such as: 4 volts, the third preset voltage value may also be a fixed voltage value, and may be determined according to the actual conditions of the whole vehicle, such as: 12.4 volts.
Referring to fig. 1, the first charging operation is: the control unit 42 controls the first switch K1 and the third switch K3 to be closed, the second switch K2 to be open, at this time, the negative electrode of the storage battery 20 is connected to the metal sheet of the vehicle body through the first switch K1, namely, is grounded to the vehicle body, the positive electrode of the storage battery 20 is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage regulator 41, and the negative electrode of the super capacitor 30 is connected to the metal sheet of the vehicle body, namely, is grounded to the vehicle body, so that the storage battery 20 can perform the first charging operation on the super capacitor 30. Since the storage battery 20 and the super capacitor 30 are dc power supplies with different voltage levels, a dc-dc voltage stabilizer 41 needs to be disposed between the storage battery 20 and the super capacitor 30 to realize electric energy conversion between the dc power supplies with different voltage levels.
In the embodiment of the present invention, the first charging operation is to charge the super capacitor by the storage battery according to a preset time duration, where the preset time duration may be a fixed time value, and may be determined according to an actual situation of the super capacitor, for example: for 30 seconds. This is because the super capacitor can store a small amount of electricity and can be fully charged in a short period of time.
Further, the power management unit controls the storage battery to perform a first charging operation on the super capacitor according to a preset time period, and then step 206 is executed.
Substep 2056, maintaining this state, does not perform the first charging operation on the supercapacitor.
In this step, since it is determined in sub-step 2053 that the voltage value of the super capacitor is greater than or equal to the second preset voltage value, it may be determined that the super capacitor stores more electric energy at this time and does not need to be charged, so that the state is maintained and the first charging operation is not performed on the super capacitor.
Alternatively, since it is determined in sub-step 2054 that the battery is not charged enough (i.e. the voltage value of the battery is smaller than the third preset voltage value), it may be determined that the battery is not charged enough to perform the first charging operation on the super capacitor at this time, and thus the state is maintained, and the first charging operation is not performed on the super capacitor.
Alternatively, since it is determined in sub-step 2071 that the current voltage value of the super capacitor is greater than or equal to the second preset voltage value, it may be determined that the super capacitor is fully charged at this time, and thus the state is maintained, and the first charging operation is not performed on the super capacitor.
In step 206, the power management unit obtains the current voltage value of the super capacitor.
In the step, after the power management unit controls the storage battery to charge the super capacitor according to the preset time length, the power management unit detects the current voltage value of the super capacitor to judge whether to continue to use the storage battery at the moment and perform a first charging operation on the super capacitor according to the preset time length.
Further, if the current voltage value of the super capacitor is greater than or equal to the second preset voltage value, step 207 is executed, and if the current voltage value of the super capacitor is smaller than the second preset voltage value, the super capacitor is charged again according to the preset duration until the current voltage value of the super capacitor is greater than or equal to the second preset voltage value.
Step 207, the power management unit completes the first charging operation when the current voltage value of the super capacitor is greater than or equal to a second preset voltage value.
Optionally, referring to fig. 6, step 207 may specifically include:
in sub-step 2071, whether the current voltage value of the super capacitor is greater than or equal to a second preset voltage value is determined.
In this step, the control unit in the power management unit obtains the current voltage value of the super capacitor from the super capacitor, and determines whether the voltage value of the super capacitor is greater than or equal to a second preset voltage value, if the voltage value of the super capacitor is greater than or equal to the second preset voltage value, sub-step 2056 is performed, and if the voltage value of the super capacitor is less than the second preset voltage value, sub-step 2051 is repeatedly performed.
And 208, if the current state of the vehicle is the vehicle state, the power management unit controls the generator to perform a second charging operation on the super capacitor according to a preset time length.
Referring to fig. 7, a flowchart illustrating steps of a hybrid power management method in a landing state according to an embodiment of the present invention is shown.
Optionally, referring to fig. 7, step 208 may specifically include:
substep 2081, whether the current state of the vehicle is the landing state.
In this step, the power management unit in the hybrid power management system may acquire the current state of the vehicle through the engine ECU and the ECUs of other electrical modules on the vehicle, and the engine ECU collects the operating state information of each part of the engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor, and the like) and analyzes the operating state information of each part of the engine, so that information about what functions of each part of the engine are, how the operating condition is, and the like may be obtained, thereby determining whether the current state of the vehicle is the wake-up state.
Specifically, if the current state of the vehicle is the landing state, substep 2083 is performed, and if the current state of the vehicle is not the awake state, substep 2082 is performed.
Substep 2082, performing other steps based on the current state of the vehicle.
In this step, if the current state of the vehicle is not the awake state, other steps are performed according to the current state of the vehicle.
Substep 2083, closing the first switch and the third switch, opening the second switch, and performing a second charging operation on the super capacitor by the generator according to a preset time length
In this step, when the power management unit detects that the current state of the vehicle is the landing state, the control unit may control the generator to perform a second charging operation on the super capacitor, at this time, since the engine of the vehicle is in the running state, the engine may drive the generator to operate, so that the generator is in the working state, and therefore the generator in the working state charges the super capacitor, and in addition, the generator in the working state may also charge the storage battery.
Referring to fig. 1, the positive electrode of the battery 20 is connected to the positive electrode of the generator G, and the negative electrode of the battery 20 is connected to the negative electrode of the generator G, so that the generator G continues to charge the battery 20 until the battery 20 is fully charged when the generator G is in an operating state and the operating voltage of the generator G is greater than the voltage of the battery 20. Meanwhile, the generator G in the working state also performs a second charging operation on the super capacitor 30, where the second charging operation is: the control unit 42 controls the first switch K1 and the third switch K3 to be closed, the second switch K2 to be open, at this time, the negative electrode of the generator G is connected to the metal sheet of the vehicle body through the first switch K1, that is, connected to the vehicle body ground, so as to achieve the ground, the positive electrode of the generator G is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage stabilizer 41, and the negative electrode of the super capacitor 30 is connected to the metal sheet of the vehicle body, that is, connected to the vehicle body ground, so as to achieve the ground, so that the generator G can perform the second charging operation on the super capacitor 30. Since the generator G and the super capacitor 30 are dc power supplies with different voltage levels, a dc-dc voltage stabilizer 41 needs to be disposed between the generator G and the super capacitor 30 to realize electric energy conversion between the dc power supplies with different voltage levels.
In the embodiment of the present invention, the second charging operation is that the generator charges the super capacitor according to a preset time duration, where the preset time duration may be a fixed time value, and may be determined according to an actual situation of the super capacitor, for example: for 30 seconds. This is because the super capacitor can store a small amount of electricity and can be fully charged in a short period of time.
Step 209, the power management unit obtains the current voltage value of the super capacitor.
In the step, after the power management unit controls the generator to perform the second charging operation on the super capacitor according to the preset time length, the power management unit detects the current voltage value of the super capacitor to judge whether to continue to use the generator to perform the second charging operation on the super capacitor according to the preset time length.
In step 210, the power management unit completes the second charging operation when the current voltage value of the super capacitor is greater than or equal to a fourth preset voltage value.
In this step, if the current voltage value of the super capacitor is greater than or equal to the fourth preset voltage value, which indicates that the super capacitor is fully charged at this time, the sub-step 2102 is executed to complete the second charging operation, and the super capacitor is not subjected to the second charging operation.
Further, after the current voltage value of the super capacitor is detected to be greater than or equal to the fourth preset voltage value, the generator can be controlled not to perform the second charging operation on the super capacitor any more by turning off the third switch and/or turning off the dc-dc voltage regulator.
And if the current voltage value of the super capacitor is smaller than the fourth preset voltage value, the substep 2081 is repeatedly executed, and under the condition that the current state of the vehicle is determined to be the vehicle state, the super capacitor is charged for the second time according to the preset time length until the current voltage value of the super capacitor is larger than or equal to the fourth preset voltage value.
And step 211, if the current state of the vehicle is a braking energy recovery state, the power management unit controls the generator to generate power at the maximum power generation voltage, and charges the storage battery and the super capacitor.
Referring to fig. 8, a flowchart illustrating steps of a hybrid power management method in a braking energy recovery state according to an embodiment of the present invention is shown.
Optionally, referring to fig. 8, step 211 may specifically include:
substep 2111, whether the current state of the vehicle is a braking energy recovery state.
In this step, the power management unit in the hybrid power management system may acquire the current state of the vehicle through the engine ECU and the ECUs of other electrical modules on the vehicle, and the engine ECU collects the operating state information of each part of the engine through various sensors (including a temperature sensor, a pressure sensor, a rotation sensor, a flow sensor, a position sensor, and the like) and analyzes the operating state information of each part of the engine, so that information about what functions of each part of the engine are, how the operating condition is, and the like may be obtained, thereby determining whether the current state of the vehicle is the wake-up state.
Specifically, if the current state of the vehicle is the braking energy recovery state, the substep 2113 is executed, and if the current state of the vehicle is not the wake-up state, the substep 2112 is executed.
Sub-step 2112, performing other steps according to the current state of the vehicle.
In this step, if the current state of the vehicle is not the awake state, other steps are performed according to the current state of the vehicle.
In substep 2113, the first switch and the third switch are closed, the second switch is opened, and the generator charges the battery and the super capacitor with the maximum generated voltage.
In this step, when the power management unit detects that the current state of the vehicle is the braking energy recovery state, a suitable hybrid power management method of the hybrid power management system may be determined according to the voltage value of the super capacitor.
Specifically, under the condition that the current state of the vehicle is a braking energy recovery state, the control unit can control the generator to charge the storage battery and the super capacitor at the maximum generating voltage, and at the moment, because the engine of the vehicle is in the braking energy recovery state, in order to improve the recovery efficiency of the vehicle, the generator charges the storage battery and the super capacitor at the maximum generating voltage, so that the energy consumption is reduced.
In addition, when the current state of the engine M is the braking energy recovery state, the torque of the generator is maximized when the generator G is operated at the maximum generation voltage, so that a certain braking effect can be exerted.
In the embodiment of the invention, the hybrid power management system is applied to a vehicle with a 12-volt power system, the rated voltage of a common storage battery is 12 volts, the rated voltage of a super capacitor is 6 volts, the rated voltage of a generator is 14 volts, and the maximum generating voltage of the generator is 15 volts.
Referring to fig. 1, the positive electrode of the battery 20 is connected to the positive electrode of the generator G, and the negative electrode of the battery 20 is connected to the negative electrode of the generator G, so that the generator G continues to charge the battery 20 until the battery 20 is fully charged when the generator G operates at the maximum power generation voltage and the operating voltage of the generator G is greater than the voltage of the battery 20. Meanwhile, the generator G working at the maximum generation voltage also charges the super capacitor 30, and the specific process is as follows: the control unit 42 controls the first switch K1 and the third switch K3 to be closed, the second switch K2 to be open, at this time, the negative electrode of the generator G is connected to the metal sheet of the vehicle body through the first switch K1, namely, is grounded to the vehicle body, the positive electrode of the generator G is connected to the positive electrode of the super capacitor 30 through the third switch K3 and the dc-dc voltage stabilizer 41, the negative electrode of the super capacitor 30 is connected to the metal sheet of the vehicle body, namely, is grounded to the vehicle body, and thus the generator G can charge the super capacitor 30 with the maximum generating voltage. Since the generator G and the super capacitor 30 are dc power supplies with different voltage levels, a dc-dc voltage stabilizer 41 needs to be disposed between the generator G and the super capacitor 30 to realize electric energy conversion between the dc power supplies with different voltage levels.
Sub-step 2114, whether the braking process is over.
In the embodiment of the invention, the operation of charging the super capacitor by the generator working at the maximum generating voltage is that the generator continuously charges the super capacitor in the primary braking process of the vehicle, because the charging voltage is lower at the moment, dangerous events such as explosion of the super capacitor due to overcharging and the like can not be caused, and the electric quantity can be automatically stopped continuously obtaining from the generator after the super capacitor is fully charged, so that the current voltage value of the super capacitor is detected only after the primary braking of the vehicle is finished, if the current voltage value of the super capacitor after the primary braking of the vehicle is finished is greater than or equal to a fifth preset voltage value, the charging process of the super capacitor is finished, the super capacitor is not charged again when the vehicle is braked next time, if the current voltage value of the super capacitor after the primary braking of the vehicle is finished is less than the fifth preset voltage value, when the vehicle is braked next time, the generator continues to operate at the maximum generation voltage to charge the super capacitor.
In this step, the power management unit may determine whether the braking process is finished according to the driving speed of the vehicle or whether the throttle signal is detected, for example, when the driving speed of the vehicle is less than or equal to a preset speed value, the preset speed value may be 5 km/h, or when the throttle signal is detected, the braking process may be finished.
Specifically, if it is determined that the braking process is ended, the substep 2115 is performed, and if it is determined that the braking process is not ended, the substep 2113 is repeatedly performed.
In sub-step 2115, the power management unit obtains the current voltage value of the super capacitor.
In this step, after the braking process is finished, the power management unit detects the current voltage value of the super capacitor to determine whether to continue to use the generator to charge the super capacitor with the maximum generation voltage in the next braking process.
And a sub-step 2116, whether the current voltage value of the super capacitor is greater than or equal to a fifth preset voltage value.
In this step, if the current voltage value of the super capacitor is greater than or equal to the fifth preset voltage value, it indicates that the super capacitor is fully charged, and sub-step 2117 is performed to complete the charging operation of the super capacitor and no longer charge the super capacitor.
Further, after the current voltage value of the super capacitor is detected to be greater than or equal to the fifth preset voltage value, the generator can be controlled not to charge the super capacitor any more by turning off the third switch and/or turning off the dc-dc voltage regulator.
If the current voltage value of the super capacitor is smaller than the fifth preset voltage value, the substep 2111 is repeatedly executed, and under the condition that the current state of the vehicle is determined to be the braking energy recovery state, the generator is utilized again to charge the storage battery and the super capacitor with the maximum generating voltage in the next braking process until the current voltage value of the super capacitor is larger than or equal to the fifth preset voltage value.
Preferably, the fifth preset voltage value may be a fixed voltage value, and may be determined according to actual conditions of the whole vehicle, such as: 6 volts.
And a substep 2117, in the next braking process, the super capacitor is not charged any more, and only the storage battery is charged.
In this step, after the braking process is finished, if it is detected that the current voltage value of the super capacitor is greater than or equal to the fifth preset voltage value, it indicates that the super capacitor is fully charged at this time, and the super capacitor is not charged in the next braking process. However, in the case of the battery, since the battery is required to supply power to some of the electric devices on the vehicle in the vehicle running or awake state, the amount of electric power of the battery is continuously consumed, and therefore, the battery continues to be charged during the next braking process.
In summary, the composite power management method provided in the embodiment of the present invention includes: the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit; the positive pole of the storage battery is connected with the positive pole of the generator, and the negative pole of the storage battery is connected with the negative pole of the generator; the power management unit is simultaneously connected with the anode of the storage battery, the anode of the super capacitor and the anode of the generator; the cathode of the super capacitor is connected with the body of the vehicle in a bonding way; the negative pole of the storage battery is connected with the body of the vehicle through a power management unit; if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter. In the embodiment of the invention, when the engine is in a starting state, the power management unit controls the storage battery and the super capacitor to be connected in series to form the composite power supply to start the starter, so that the engine runs in a required working state to complete the starting process of the automobile.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. A hybrid power management system for a vehicle, the system comprising:
the system comprises a starter, a storage battery, a super capacitor, an engine, a generator and a power supply management unit;
the positive electrode of the storage battery is connected with the positive electrode of the generator, and the negative electrode of the storage battery is connected with the negative electrode of the generator;
the power management unit is simultaneously connected with the positive electrode of the storage battery, the positive electrode of the super capacitor and the positive electrode of the generator; the cathode of the super capacitor is connected with the body earth of the vehicle; the negative electrode of the storage battery is connected with the vehicle body of the vehicle through the power supply management unit in a bonding mode;
if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit controls the storage battery and the super capacitor to be connected in series to form a hybrid power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value, and the hybrid power supply is used for starting the starter;
the power management unit comprises a first switch, a second switch, a third switch, a direct current-direct current voltage stabilizer and a control unit;
one end of the first switch is connected with the negative electrode of the storage battery, and the other end of the first switch is connected with a vehicle body grounding of the vehicle;
one end of the second switch is connected with the negative electrode of the storage battery, and the other end of the second switch is simultaneously connected with the positive electrode of the super capacitor and one end of the direct current-direct current voltage stabilizer;
one end of the third switch is connected with the anode of the storage battery and the anode of the generator at the same time, and the other end of the third switch is connected with the other end of the direct current-direct current voltage stabilizer;
one end of the direct current-direct current voltage stabilizer is connected with the other end of the third switch, and the other end of the direct current-direct current voltage stabilizer is simultaneously connected with the anode of the super capacitor and the other end of the second switch;
the control unit is used for receiving the voltage value of the super capacitor, the voltage value and the state of charge value of the storage battery and the current state signal of the vehicle, and controlling the first switch, the second switch, the third switch and the direct current-direct current voltage stabilizer to be switched on or switched off.
2. The system of claim 1, further comprising:
and if the current state of the vehicle is a braking energy recovery state, the power management unit controls the generator to generate power at the maximum power generation voltage and charge the storage battery and the super capacitor.
3. The system of claim 1, further comprising:
if the current state of the vehicle is an awakening state and the voltage value of the super capacitor is smaller than a second preset voltage value, the power management unit controls the storage battery to perform first charging operation on the super capacitor according to a preset time length under the condition that the voltage value of the storage battery is larger than or equal to a third preset voltage value;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the first charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to the second preset voltage value.
4. The system of claim 1, further comprising:
if the current state of the vehicle is a vehicle state, the power management unit controls the generator to perform a second charging operation on the super capacitor according to a preset time length;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the second charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to a fourth preset voltage value.
5. The system according to claim 1, wherein if the current state of the vehicle is a start state and the state of charge value of the battery is less than or equal to a preset state of charge value, the power management unit controls the battery and the super capacitor to be connected in series to form a hybrid power supply in the case that the voltage value of the battery is less than or equal to a first preset voltage value, and the step of the hybrid power supply for starting the starter comprises:
the power management unit controls the first switch and the third switch to be switched off, and the second switch is switched on, so that the storage battery and the super capacitor are connected in series to form the composite power supply.
6. The system of claim 2, wherein the step of the power management unit controlling the generator to generate power at a maximum generation voltage and charge the battery and the super capacitor if the current state of the vehicle is a braking energy recovery state comprises:
the power supply management unit controls the second switch to be opened and the first switch to be closed, so that the generator charges the storage battery at the maximum generating voltage;
the power management unit controls the third switch to be closed, so that the generator charges the super capacitor at the maximum generating voltage.
7. The system according to claim 3, wherein if the current state of the vehicle is an awake state and the voltage value of the super capacitor is smaller than a second preset voltage value, the step of controlling the storage battery to perform a first charging operation on the super capacitor according to a preset time duration by the power management unit when the voltage value of the storage battery is greater than or equal to a third preset voltage value comprises:
the power supply management unit controls the second switch to be switched off, and the first switch is switched on, so that the negative electrode of the storage battery is connected with the body of the vehicle in a bonding mode;
and the power management unit controls the third switch to be closed, so that the storage battery performs the first charging operation on the super capacitor according to the preset time length.
8. The system of claim 4, wherein if the current state of the vehicle is a driving state, the step of controlling the generator to perform a second charging operation on the super capacitor according to a preset time duration by the power management unit comprises:
the power supply management unit controls the second switch to be switched off and the first switch to be switched on, so that the generator charges the storage battery;
and the power management unit controls the third switch to be closed, so that the generator carries out the second charging operation on the super capacitor according to the preset time length.
9. A hybrid power management method applied to the hybrid power management system according to any one of claims 1 to 8, the method comprising:
the power supply management unit acquires the current state of the vehicle;
the power management unit acquires a state of charge value and a voltage value of the storage battery;
if the current state of the vehicle is a starting state and the state of charge value of the storage battery is smaller than or equal to a preset state of charge value, the power management unit connects the storage battery and the super capacitor in series to form a composite power supply under the condition that the voltage value of the storage battery is smaller than or equal to a first preset voltage value;
the power supply management unit starts a starter through the hybrid power supply;
the power management unit comprises a first switch, a second switch, a third switch, a direct current-direct current voltage stabilizer and a control unit;
one end of the first switch is connected with the negative electrode of the storage battery, and the other end of the first switch is connected with a vehicle body grounding of the vehicle;
one end of the second switch is connected with the negative electrode of the storage battery, and the other end of the second switch is simultaneously connected with the positive electrode of the super capacitor and one end of the direct current-direct current voltage stabilizer;
one end of the third switch is connected with the anode of the storage battery and the anode of the generator at the same time, and the other end of the third switch is connected with the other end of the direct current-direct current voltage stabilizer;
one end of the direct current-direct current voltage stabilizer is connected with the other end of the third switch, and the other end of the direct current-direct current voltage stabilizer is simultaneously connected with the anode of the super capacitor and the other end of the second switch;
the control unit is used for receiving the voltage value of the super capacitor, the voltage value and the state of charge value of the storage battery and the current state signal of the vehicle, and controlling the first switch, the second switch, the third switch and the direct current-direct current voltage stabilizer to be switched on or switched off.
10. The method of claim 9, wherein after the step of obtaining the current state of the vehicle, the method further comprises:
and if the current state of the vehicle is a braking energy recovery state, the power management unit controls the generator to generate power at the maximum power generation voltage and charge the storage battery and the super capacitor.
11. The method of claim 9, wherein after the step of obtaining the state-of-charge value and the voltage value of the battery, the method further comprises:
if the current state of the vehicle is an awakening state and the voltage value of the super capacitor is smaller than a second preset voltage value, the power management unit controls the storage battery to perform first charging operation on the super capacitor according to a preset time length under the condition that the voltage value of the storage battery is larger than or equal to a third preset voltage value;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the first charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to the second preset voltage value.
12. The method of claim 9, wherein after the step of obtaining the state-of-charge value and the voltage value of the battery, the method further comprises:
if the current state of the vehicle is a vehicle state, the power management unit controls the generator to perform a second charging operation on the super capacitor according to a preset time length;
the power management unit acquires the current voltage value of the super capacitor;
and the power supply management unit completes the second charging operation under the condition that the current voltage value of the super capacitor is greater than or equal to a fourth preset voltage value.
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Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201025205Y (en) * 2007-03-26 2008-02-20 康国强 Assisted start device for car
CN101175917A (en) * 2005-05-17 2008-05-07 松下电器产业株式会社 Engine start device
CN201236761Y (en) * 2008-08-04 2009-05-13 东风汽车股份有限公司 Automobile starting power supply device
WO2012104036A1 (en) * 2011-02-03 2012-08-09 Audi Ag Energy storage system comprising a lithium-ion capacitor
CN102691607A (en) * 2012-06-08 2012-09-26 汤如法 Auxiliary starting device of vehicle engine
CN103280872A (en) * 2013-05-13 2013-09-04 中联重科股份有限公司 Control method and device of power supply device, power supply system and equipment
KR20130136791A (en) * 2012-06-05 2013-12-13 엘에스엠트론 주식회사 Power system for vehicle and control method for the same
CN104052141A (en) * 2013-03-12 2014-09-17 天津普兰纳米科技有限公司 Power source device and manufacturing method thereof
JP2016033345A (en) * 2014-07-31 2016-03-10 いすゞ自動車株式会社 Engine starter system
CN105667430A (en) * 2015-03-25 2016-06-15 深圳太研能源科技有限公司 Starting control device, system and method
CN205489678U (en) * 2016-03-16 2016-08-17 奇瑞汽车股份有限公司 Vehicle starting power device
CN106224151A (en) * 2016-08-31 2016-12-14 武汉华海通用电气有限公司 A kind of generating set starter and startup control method
CN106704073A (en) * 2017-01-20 2017-05-24 东莞亚晔实业有限公司 Auxiliary starting device and method for engine
CN108123510A (en) * 2016-11-28 2018-06-05 深圳太研能源科技有限公司 A kind of emergency starting power supply and its emergency starting method

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101175917A (en) * 2005-05-17 2008-05-07 松下电器产业株式会社 Engine start device
CN201025205Y (en) * 2007-03-26 2008-02-20 康国强 Assisted start device for car
CN201236761Y (en) * 2008-08-04 2009-05-13 东风汽车股份有限公司 Automobile starting power supply device
WO2012104036A1 (en) * 2011-02-03 2012-08-09 Audi Ag Energy storage system comprising a lithium-ion capacitor
KR20130136791A (en) * 2012-06-05 2013-12-13 엘에스엠트론 주식회사 Power system for vehicle and control method for the same
CN102691607A (en) * 2012-06-08 2012-09-26 汤如法 Auxiliary starting device of vehicle engine
CN104052141A (en) * 2013-03-12 2014-09-17 天津普兰纳米科技有限公司 Power source device and manufacturing method thereof
CN103280872A (en) * 2013-05-13 2013-09-04 中联重科股份有限公司 Control method and device of power supply device, power supply system and equipment
JP2016033345A (en) * 2014-07-31 2016-03-10 いすゞ自動車株式会社 Engine starter system
CN105667430A (en) * 2015-03-25 2016-06-15 深圳太研能源科技有限公司 Starting control device, system and method
CN205489678U (en) * 2016-03-16 2016-08-17 奇瑞汽车股份有限公司 Vehicle starting power device
CN106224151A (en) * 2016-08-31 2016-12-14 武汉华海通用电气有限公司 A kind of generating set starter and startup control method
CN108123510A (en) * 2016-11-28 2018-06-05 深圳太研能源科技有限公司 A kind of emergency starting power supply and its emergency starting method
CN106704073A (en) * 2017-01-20 2017-05-24 东莞亚晔实业有限公司 Auxiliary starting device and method for engine

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