CN114571969A - Heating control system for battery pack of hybrid power tractor and control method thereof - Google Patents
Heating control system for battery pack of hybrid power tractor and control method thereof Download PDFInfo
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- CN114571969A CN114571969A CN202210245514.8A CN202210245514A CN114571969A CN 114571969 A CN114571969 A CN 114571969A CN 202210245514 A CN202210245514 A CN 202210245514A CN 114571969 A CN114571969 A CN 114571969A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims description 16
- 238000007599 discharging Methods 0.000 claims description 8
- 239000013256 coordination polymer Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/008—Arrangement or mounting of electrical propulsion units with means for heating the electrical propulsion units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The control system is realized by an engine, a generator controller, a vehicle control unit, a battery management assembly, a charger, a high-voltage box and a battery pack, two different heating modes are designed according to different heating modes of the battery pack, and the battery management assembly and the vehicle control unit control a high-voltage relay in the high-voltage box to realize different heating paths, so that the heating of the battery pack is realized, and the battery pack can be charged and discharged more safely.
Description
Technical Field
The invention relates to the application field of a power battery of a hybrid power tractor, in particular to a heating control system and a heating control method of a power battery pack of the hybrid power tractor.
Background
Hybrid tractors typically employ a lithium ion battery pack as a power source. Due to the temperature characteristic of the lithium ion battery, under the condition of low temperature (the temperature is lower than 0 ℃), metal lithium is separated out from electrolyte when the lithium ion battery is charged, a diaphragm can be pierced, the internal short circuit of the battery is caused, and the safety of the lithium ion battery is threatened. When the hybrid tractor is operated in a low temperature state, the generator will generate electricity and charge the battery, which may cause the safety problem described above. Therefore, the battery pack of the hybrid tractor needs to be heated under the low-temperature condition, so that the temperature of the battery pack reaches the charging temperature of the battery, the phenomenon of low-temperature charging is avoided, and the safety of the battery pack is ensured.
Disclosure of Invention
The technical purpose of the invention is as follows: the control system and the control method can heat and raise the temperature of the power battery in a parking commercial power supply state or a normal working state so as to avoid charging the power battery in a low-temperature state, effectively prolong the service life of the battery pack and ensure the safety of the battery pack during working.
In order to achieve the technical purpose, the invention adopts the technical scheme that: a heating control system for a battery pack of a hybrid power tractor comprises a control mechanism, an engine, a generator, a high-voltage box, a charger and the battery pack, a power battery and a heating device for heating the power battery are arranged in the battery pack, the control mechanism comprises a vehicle control unit, an engine controller, a generator controller, a battery management assembly and a display assembly which are communicated and interacted with each other through a CAN bus, wherein, the battery management component and the display component are respectively used for monitoring and displaying the working state of the battery pack, the vehicle control unit is used for acquiring the control information of the engine controller, the generator controller, the battery management component and the display component, and sends out corresponding control instruction, the said control mechanism can regulate and control the battery pack to charge and heat while the hybrid power tractor works or stops and inserts electricity;
the engine is connected with the generator and the engine controller, and the engine can drive the generator to generate power or drive the tractor to run under the control of the engine controller; the generator is connected with the engine and the generator controller, and can supply power to the engine, charge the power battery or heat the power battery through the heating device under the control of the generator controller; the high-voltage box is connected with the power battery, the heating device, the charger, the generator controller, the vehicle control unit and the battery management assembly, and can realize the charging and discharging of the power battery, the electric energy supply of the heating device and the driving of the generator through the on-off of a plurality of high-voltage contactors arranged in the high-voltage box under the control of the vehicle control unit and the battery management assembly.
Preferably, the generator controller includes a torque control mode and a voltage maintenance control mode.
Preferably, the heating device is a PTC or a heating film resistor.
Preferably, the high-voltage box include connecting copper bar, fuse and a plurality of high-voltage contactor, a plurality of high-voltage contactor are connected with battery management subassembly or vehicle control unit respectively.
Preferably, the number of the high-voltage contactors in the high-voltage box is 5, 2 of the high-voltage contactors are in control connection with a whole vehicle controller, the other 3 high-voltage contactors are in control connection with a battery management assembly, and the on-off of the 5 high-voltage contactors can form four high-voltage distribution channels, namely a heating channel, a main power channel, a charging channel and a battery channel, in the high-voltage box; the heating channel is connected with the heating device and used for providing electric energy for the heating device so as to realize the heating of the power battery; the battery channel is connected with the power battery and is used for realizing the charging and discharging of the power battery; the main power channel is connected with the generator controller and used for driving the generator or charging the power battery through the generator; the charging channel is connected with the charger and is used for charging or heating the power battery by the charger through an external charging socket.
A control method of a heating control system for a battery pack of a hybrid tractor comprises the following steps:
step one, setting the real-time temperature of the power battery as T and the allowable charging temperature as T1When the battery control assembly detects that the real-time temperature T of the power battery is less than T1When the power battery is charged, the battery control assembly sends information to the display assembly to prompt that the power battery needs to be heated and charged;
step two, when the hybrid power tractor needs to be stopped, charged and heated, the charger is connected with an external charging socket, CC and CP signals in the charging socket enter a battery management assembly, the battery management assembly judges that the hybrid power tractor is connected with external 220V commercial power through the two signals, and the charging connection signal and the heating signal of the power battery are sent to the vehicle control unit;
thirdly, the vehicle control unit controls a high-voltage contactor K1 and a high-voltage contactor K3 connected with the generator controller in the high-voltage box to be disconnected and requests the generator controller to quickly discharge to a safe voltage, and then the vehicle control unit sends a signal that the high-voltage system switch is disconnected to the battery management assembly;
after receiving a disconnection signal of a high-voltage system switch, the battery management assembly controls a high-voltage contactor K2 connected with the charger and a high-voltage contactor K4 connected with the heating device in the high-voltage box to be closed, and controls a high-voltage contactor K5 connected with the power battery in the high-voltage box to be disconnected, so that the positive end and the negative end of the charger are connected to two ends of the heating device in the battery pack;
step five, after the battery management assembly detects that the CC and CP signals in the charging socket are normal again, a charging request is sent to a charger, the charger supplies power to the heating device according to the rated voltage and current of the heating device so as to heat the power battery, and in the process, the battery management assembly monitors the real-time temperature T of the power battery and displays the monitored information in real time through the display assembly;
step six, when the battery management assembly detects that the real-time temperature T of the power battery is greater than the charging allowable temperature T1When the charging is finished, the high-voltage contactor K4 is controlled to be disconnected, the high-voltage contactor K5 is controlled to be closed, the positive end and the negative end of the charger are connected to the two ends of the power battery, the battery management assembly provides a charging request to the charger, and the charger charges the power battery according to the current bearing capacity of the battery management assembly until the SOC upper limit of the power battery is reached or a charging socket is disconnected;
step seven, when the hybrid power tractor needs to work, charge and heat, the vehicle controller starts the engine through the generator, the vehicle controller and the battery control assembly respectively regulate and control the high-voltage contactor K1 and the high-voltage contactor K5 to be closed, so that the power battery can be charged and discharged through the generator, and then the battery management assembly sends a heating request of the power battery to the vehicle controller;
step eight, after receiving the heating request, the vehicle control unit sends a voltage maintenance control mode request to the generator controller, and requests that the current voltage is the target voltage, after receiving feedback sent by the generator controller to complete voltage maintenance control mode switching, the vehicle control unit controls the high-voltage contactor K1 to be disconnected and the high-voltage contactor K3 to be closed, and sends a CAN message allowing heating to the battery management assembly;
step nine, after receiving an instruction of allowing heating, the battery management assembly disconnects the high-voltage contactor K2, closes the high-voltage contactor K4, enables two ends of a heating device in the battery pack to be connected to a direct current end of a generator controller, sends rated voltage of the heating device to the vehicle control unit, sends the vehicle control unit to the generator controller by taking the rated voltage of the heating device as target voltage, supplies power to the heating device by rated power after the generator controller adjusts output voltage to heat the power battery, and in the process, the battery management assembly monitors real-time temperature T of the power battery and displays monitored information in real time through the display assembly; the vehicle controller controls the driving power in the heating process, and avoids sudden change of the driving power so as to maintain the stability of the heating system;
step ten, when the battery management assembly detects that the real-time temperature T of the power battery is greater than the charging allowable temperature T1When the heating device is used, the high-voltage contactor K4 is controlled to be disconnected, and an indication of heating completion is sent to the whole vehicle controller;
step eleven, after receiving the indication of heating completion, the vehicle control unit controls the high-voltage contactor K3 to be disconnected, the high-voltage contactor K1 to be closed, the vehicle control unit requests a voltage slightly higher than the current power battery voltage to be a target voltage from the generator controller, and after the generator controller adjusts the output voltage, the vehicle control unit sends an instruction of closing the high-voltage contactor K5 to the battery management assembly;
and step twelve, after the battery management assembly receives the instruction, controlling the high-voltage contactor K5 to be closed, so that the power battery can perform normal charging and discharging work through the generator.
The invention has the beneficial effects that:
according to the heating control system for the battery pack of the hybrid tractor and the control method thereof, the distributed control system is arranged on the hybrid tractor, so that the battery pack can be conveniently, quickly and efficiently heated in a parking commercial power supply state or a normal working state of the hybrid tractor. The method has low overall cost and strong operability, can effectively realize the charging protection of the lithium battery, avoids the lithium battery from being charged in a low-temperature state, further reduces the fault rate of the lithium battery, effectively prolongs the service life of the battery pack, and ensures the safety of the lithium battery during working.
Drawings
FIG. 1 is a block diagram of a high pressure system of the present invention;
FIG. 2 is a diagram of a distributed system control of the present invention;
FIG. 3 is a wiring diagram of the switch inside the high voltage tank;
reference numerals: 1. the system comprises an engine, 2, a generator, 3, a high-voltage box, 4, a charger, 5, a battery pack, 501, a power battery, 502, a heating device, 6, a vehicle control unit, 7, an engine controller, 8, a generator controller, 9, a battery management assembly, 10, a display assembly, 11 and a charging socket.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a heating control system for a battery pack of a hybrid tractor and a control method thereof, wherein the control method is realized by a distributed control system on the hybrid tractor, and a related main control mechanism comprises an engine controller 7 (EMS), a generator controller 8 (MCU), a vehicle control unit 6 (VCU), a battery management assembly 9 (BMS) and a display assembly 10. The controllers carry out data transmission and CAN communication interaction through a CAN bus, and further realize safe heating of the battery pack 5 of the hybrid tractor. As shown in fig. 2.
The high-voltage system in the heating control system is composed of an engine 1, a generator 2, a generator controller 8, a high-voltage box 3, a charger 4 and a battery pack 5, wherein the battery pack 5 contains a heating device 502, and a heating interface is arranged on the heating device 502. As shown in figure 1.
The engine 1 is controlled by an engine controller 7 (EMS), is an important energy source in a hybrid system, and converts chemical energy of fuel into kinetic energy to drive a generator 2 to generate electricity or drive a tractor to run and the like. The engine controller 7 converts the operation signal of the driver into the fuel injection quantity of the engine 1, and realizes accurate control of the power output of the engine 1.
The generator 2 is directly connected with the engine 1, can be used as a motor in a series hybrid system, can be used as a motor in a parallel hybrid system to provide extra power for the engine 1, and can also be used for generating power and recovering energy to charge a battery. The generator 2 is controlled by a generator controller 8, and the generator controller 8 is used for inverting the direct current provided by the battery pack 5 into three-phase alternating current to drive the generator 2 or rectifying the three-phase alternating current generated by the generator 2 into direct current to charge the battery pack 5. The generator controller 8 (MCU) used in the present system needs to be maintained in at least a torque control mode and a voltage control mode.
The battery pack 5 includes a power battery 501, a battery management module 9 (BMS), and a heating device 502. The battery management assembly 9 is used for monitoring the working state of the whole battery pack 5 and sending the state of the battery pack 5 through a CAN bus; the heating device 502 may be a different type of electrical heating device, such as a PTC or a heating film resistor, etc.
The vehicle control unit 6 is a control unit for coordinating a vehicle control mode. The CAN bus acquires the information of other control units, and sends out related control instructions to complete the heating process of the battery pack 5 of the hybrid tractor.
The display assembly 10 is a system for indicating the current hybrid tractor heating status. The system acquires heating information through the CAN bus, displays the heating information and prompts the current working state of the battery pack 5 to the driver, so that the driver CAN perform related operations according to the current tractor state.
The high-voltage box 3 is a high-voltage distribution system of the hybrid power tractor, distributes the high voltage of the battery pack 5 to different high-voltage systems, realizes the disconnection and connection of a high-voltage path, is internally composed of a connecting copper bar, a fuse and a plurality of high-voltage contactors, and is controlled by a battery management assembly 9 and a vehicle control unit 6.
The heating method described by the invention can meet the heating requirements of the battery pack 5 of the hybrid power tractor in two different scenes, namely parking, plugging, charging and heating and working, charging and heating.
The parking plug-in charging heating is that the hybrid power tractor heats the battery pack 5 when being charged by connecting a cable with a mains supply after parking. The heating energy is provided by the internal charger 4 of the hybrid tractor. In the parking charging heating, when the temperature of the battery pack 5 is too low and the battery pack is charged by plugging in electricity, the charger 4 first supplies power to the heating device 502 in the battery pack 5 to heat the power battery 501, and when the temperature of the power battery 501 rises to a charging temperature range, the charger 4 is allowed to charge the power battery 501.
The operation heating is that the hybrid tractor heats the battery pack 5 after the engine 1 is started. The engine 1 drives the generator 2 to be rectified into a direct current output by the generator controller 8 to supply power to the heating device 502. The operation, charging and heating are that after the engine 1 is started at low temperature, the generator 2 supplies power to the heating device 502 in the battery pack 5 to heat the power battery 501, and when the temperature of the power battery 501 rises to a charging temperature range, the power battery 501 is allowed to be charged.
In the process of parking, plugging in electricity, charging and heating, the hybrid power tractor cannot be started normally to run. The heating process is controlled by the battery management assembly 9 and the vehicle control unit 6. The parking, power-on, charging and heating CAN be performed under the condition that the hybrid power tractor is turned OFF, the battery management assembly 9 has a charging and awakening function, and the vehicle control unit 6 and the display assembly 10 have a CAN bus awakening function so as to complete corresponding operation.
In the working and heating process, the hybrid tractor can normally run, but the power rising speed and the maximum output power are limited, and the tractor can normally run but cannot carry out field operation or transportation with large load.
The working heating process is realized by a vehicle control unit 6, a battery management assembly 9, an engine controller 7 and a generator controller 8, and the vehicle control unit 6 is used as a center to perform heating management, so that uninterrupted power is realized in the heating process.
When the battery pack 5 is effectively heated, the display assembly 10 acquires relevant information through the CAN bus, indicates the current heating state, the average temperature of the battery pack 5 and other information, and is convenient for a driver to operate.
In the control system of the present invention, the high voltage tank requires at least four high voltage distribution channels, namely, a battery channel, a heating channel, a charging channel, and a main power channel. The battery channel is connected with the battery pack and the high-voltage box, and the charging and discharging of the battery pack are realized through the channel; the heating channel provides electric energy for a heating device in the battery pack, and the electric energy sources for heating according to different tractor running states can be switched; the charging channel is a channel connected with a charger, the charger converts 220V commercial power into high-voltage direct current applied by the tractor to charge the battery, and the high-voltage direct current is also an energy source for heating; the main power channel is used for driving the generator and receiving charging fed back by the generator. The high-voltage tank contains at least 5 high-voltage contactors inside, which distribute the energy to the heating means 502 inside the battery pack 5. Two high-voltage contactors of K1 and K3 are controlled by a Vehicle Control Unit (VCU), and three high-voltage contactors of K2, K4 and K5 are controlled by a Battery Management System (BMS), as shown in figure 3.
When the vehicle needs to be parked and plugged for charging and heating, CC and CP signals in the charging socket 11 enter the battery management assembly, the battery management assembly judges that the hybrid power tractor is connected with external 220V mains supply through the two signals, and sends the charging connection signal and the battery pack heating signal to the vehicle control unit.
The vehicle controller disconnects the two high-voltage contactors K1 and K3, so that the high-voltage power supply of the generator is disconnected, and the generator controller is requested to discharge to a safe voltage quickly. After the K1 and K3 switches are turned off, the vehicle control unit will send a high voltage system switch off signal to the battery management assembly.
After the high voltage system switch is opened, the battery management assembly will close both the K2 and K4 high voltage contactors, opening the K5 high voltage contactor. At the moment, the positive end and the negative end of the charger are connected to the two ends of the heating device of the battery pack, so that power can be supplied to the heating device.
After the battery management assembly completes the closing of the K2 and K4 high-voltage contactors and the opening of the K5 high-voltage contactor, if CC and CP signals are normal, a charging request is made to a charger. The battery management component requests the output voltage and current of the charger according to the rated voltage and current of the heating device, and the heating device starts to heat the power battery.
The battery management assembly monitors the real-time temperature of the power battery, the monitored temperature information and the heating information of the battery pack are sent to the CAN bus, and the display assembly receives related information. The display component displays the heating state of the battery pack and reminds a user of the current charging stage.
After the battery management assembly detects that all the temperatures of the power batteries are in the charging range, the K4 high-voltage contactor is opened, the K5 high-voltage contactor is closed, the heating process is completed, and the main charging loop is opened. The battery management component sends charging voltage and charging current to the charger according to the current bearing capacity of the battery management component until the upper limit of the SOC of the high voltage is reached or the charging socket is disconnected.
When the vehicle needs to work and heat, the vehicle control unit starts the engine through the generator to enable the engine to work normally. At this time, the two high-voltage contactors K1 and K5 are closed, the main discharge circuit is in a closed state, and the power battery can be charged and discharged through the generator. The battery management component sends a heating request of the battery pack to the vehicle control unit.
The vehicle control unit receives a heating request of the battery pack, sends a voltage maintaining control mode request to the generator controller, and requests the current voltage to be the target voltage. And after the vehicle control unit receives the feedback that the generator controller completes the voltage maintaining mode switching, the K1 high-voltage contactor is disconnected, and the K3 high-voltage contactor is closed. And the vehicle control unit sends a CAN message allowing heating to the battery management assembly.
After receiving the heating permission instruction, the battery management assembly opens the K2 high-voltage contactor and closes the K4 high-voltage contactor. At this time, both ends of the heating device of the battery pack are connected to the direct current end of the generator controller, and heating voltage is provided for the direct current end. And the rated voltage of the heating device is sent to the vehicle control unit through the battery management assembly. And the vehicle control unit sends the rated voltage of the heating device as a target voltage to the generator controller. The generator controller will adjust the output voltage and the heating means of the battery pack will heat up at rated power.
The battery management assembly monitors the real-time temperature of the power battery, the monitored temperature information and the heating information of the battery pack are sent to the CAN bus, and the display assembly receives related information. The display component displays the heating state of the battery pack and reminds a user of the current charging stage.
After the battery management assembly detects that all the temperatures of the power batteries are in the charging range, the K4 high-voltage contactor is disconnected, and an indication of heating completion is sent to the vehicle control unit.
And after receiving the heating completion indication of the battery management assembly, the vehicle control unit opens the K3 high-voltage contactor and closes the K1 high-voltage contactor. The vehicle control unit will request a voltage slightly higher than the current power battery voltage from the generator controller as the target voltage. After the voltage adjustment of the system is completed, the vehicle control unit sends an instruction for closing the K5 high-voltage contactor to the battery management assembly.
The battery management assembly closes the K5 high voltage contactor after receiving the command. The high voltage primary circuit may be charged and discharged.
The vehicle control unit can convert the controller mode of the generator into the torque control mode when the vehicle control unit does not have the discharging request. A power interruption condition in a series hybrid system is avoided.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general concept of the invention, and it is intended to cover all such modifications and changes as fall within the true spirit and scope of the invention.
Claims (6)
1. The utility model provides a hybrid tractor group battery is with heating control system, this control system includes control mechanism, engine, generator, high-pressure tank, machine and group battery, is provided with power battery and is used for carrying out the heating device that heats power battery in the inside of group battery, its characterized in that: the control mechanism comprises a vehicle control unit, an engine controller, a generator controller, a battery management assembly and a display assembly which are mutually communicated and interacted through a CAN bus, wherein the battery management assembly and the display assembly are respectively used for monitoring and displaying the working state of the battery pack;
the engine is connected with the generator and the engine controller, and the engine can drive the generator to generate power or drive the tractor to run under the control of the engine controller; the generator is connected with the engine and the generator controller, and can supply power to the engine, charge the power battery or heat the power battery through the heating device under the control of the generator controller; the high-voltage box is connected with the power battery, the heating device, the charger, the generator controller, the vehicle control unit and the battery management assembly, and can realize the charging and discharging of the power battery, the electric energy supply of the heating device and the driving of the generator through the on-off of a plurality of high-voltage contactors arranged in the high-voltage box under the control of the vehicle control unit and the battery management assembly.
2. The heating control system for the hybrid tractor battery pack according to claim 1, characterized in that: the generator controller includes a torque control mode and a voltage maintenance control mode.
3. The heating control system for the hybrid tractor battery pack according to claim 1, characterized in that: the heating device is PTC or a heating film resistor.
4. The heating control system for the hybrid tractor battery pack according to claim 1, characterized in that: the high-voltage box comprises a connecting copper bar, a fuse and a plurality of high-voltage contactors, and the high-voltage contactors are respectively connected with the battery management assembly or the whole vehicle controller.
5. The heating control system for the hybrid tractor battery pack according to claim 1, characterized in that: the number of the high-voltage contactors in the high-voltage box is 5, 2 of the high-voltage contactors are in control connection with a whole vehicle controller, the other 3 high-voltage contactors are in control connection with a battery management assembly, and the on-off of the 5 high-voltage contactors can form four high-voltage distribution channels, namely a heating channel, a main power channel, a charging channel and a battery channel, in the high-voltage box; the heating channel is connected with the heating device and used for providing electric energy for the heating device so as to realize the heating of the power battery; the battery channel is connected with the power battery and used for realizing charging and discharging of the power battery; the main power channel is connected with the generator controller and used for driving the generator or charging the power battery through the generator; the charging channel is connected with the charger and is used for charging or heating the power battery by the charger through an external charging socket.
6. The control method of a heating control system for a hybrid tractor battery pack according to claim 1, characterized by comprising the steps of:
step one, setting the real-time temperature of the power battery as T and the allowable charging temperature as T1When the battery control assembly detects that the real-time temperature T of the power battery is less than T1When the power battery is charged, the battery control assembly sends information to the display assembly to prompt that the power battery needs to be heated and charged;
step two, when the hybrid power tractor needs to be stopped and plugged with electricity for charging and heating, the hybrid power tractor is connected with an external charging socket through a charger, CC and CP signals in the charging socket enter a battery management assembly, the battery management assembly judges that the hybrid power tractor is connected with external 220V commercial power through the two signals, and the charging connection signal and the heating signal of the power battery are sent to the vehicle control unit;
thirdly, the vehicle control unit controls a high-voltage contactor K1 and a high-voltage contactor K3 connected with the generator controller in the high-voltage box to be disconnected and requests the generator controller to quickly discharge to a safe voltage, and then the vehicle control unit sends a signal that the high-voltage system switch is disconnected to the battery management assembly;
after the battery management assembly receives a signal that the high-voltage system switch is disconnected, controlling a high-voltage contactor K2 connected with a charger in the high-voltage box and a high-voltage contactor K4 connected with the heating device to be closed, and controlling a high-voltage contactor K5 connected with the power battery in the high-voltage box to be disconnected, so that the positive end and the negative end of the charger are connected to two ends of the heating device in the battery pack;
step five, after the battery management assembly detects that the CC and CP signals in the charging socket are normal again, a charging request is sent to a charger, the charger supplies power to the heating device according to the rated voltage and current of the heating device so as to heat the power battery, and in the process, the battery management assembly monitors the real-time temperature T of the power battery and displays the monitored information in real time through the display assembly;
step six, when the battery management assembly detects that the real-time temperature T of the power battery is greater than the charging allowable temperature T1When the charging is finished, the high-voltage contactor K4 is controlled to be disconnected, the high-voltage contactor K5 is controlled to be closed, the positive end and the negative end of the charger are connected to the two ends of the power battery, the battery management assembly provides a charging request to the charger, and the charger charges the power battery according to the current bearing capacity of the battery management assembly until the SOC upper limit of the power battery is reached or a charging socket is disconnected;
step seven, when the hybrid power tractor needs to work, charge and heat, the vehicle control unit starts the engine through the generator, the vehicle control unit and the battery control assembly respectively regulate and control the high-voltage contactor K1 and the high-voltage contactor K5 to be closed, so that the power battery can be charged and discharged through the generator, and then the battery management assembly sends a heating request of the power battery to the vehicle control unit;
step eight, after receiving the heating request, the vehicle control unit sends a voltage maintenance control mode request to the generator controller, and requests that the current voltage is the target voltage, after receiving feedback sent by the generator controller to complete voltage maintenance control mode switching, the vehicle control unit controls the high-voltage contactor K1 to be disconnected and the high-voltage contactor K3 to be closed, and sends a CAN message allowing heating to the battery management assembly;
step nine, after receiving an instruction of allowing heating, the battery management assembly disconnects the high-voltage contactor K2, closes the high-voltage contactor K4, enables two ends of a heating device in the battery pack to be connected to a direct current end of a generator controller, sends rated voltage of the heating device to the vehicle control unit, sends the vehicle control unit to the generator controller by taking the rated voltage of the heating device as target voltage, supplies power to the heating device by rated power after the generator controller adjusts output voltage to heat the power battery, and in the process, the battery management assembly monitors real-time temperature T of the power battery and displays monitored information in real time through the display assembly;
step ten, when the battery management assembly detects that the real-time temperature T of the power battery is greater than the charging allowable temperature T1When the heating device is used, the high-voltage contactor K4 is controlled to be disconnected, and an indication of heating completion is sent to the whole vehicle controller;
step eleven, after receiving the indication of heating completion, the vehicle control unit controls the high-voltage contactor K3 to be disconnected, the high-voltage contactor K1 to be closed, the vehicle control unit requests a voltage slightly higher than the current power battery voltage to be a target voltage from the generator controller, and after the generator controller adjusts the output voltage, the vehicle control unit sends an instruction of closing the high-voltage contactor K5 to the battery management assembly;
and step twelve, after the battery management assembly receives the instruction, controlling the high-voltage contactor K5 to be closed, so that the power battery can perform normal charging and discharging work through the generator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117698449A (en) * | 2023-11-15 | 2024-03-15 | 湖南麦格米特电气技术有限公司 | Power battery system, control method thereof and electric road-pressing vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206306847U (en) * | 2016-12-27 | 2017-07-07 | 上汽大通汽车有限公司 | Pure motor wagon high-tension distribution box |
| CN109747483A (en) * | 2018-12-10 | 2019-05-14 | 山东国金汽车制造有限公司 | A kind of power battery High-Power PTC heating system and its control method |
| CN110077281A (en) * | 2019-04-30 | 2019-08-02 | 浙江吉利控股集团有限公司 | A kind of charging heating method and system of plug-in hybrid electric vehicle power battery |
| WO2020125771A1 (en) * | 2018-12-21 | 2020-06-25 | 比亚迪股份有限公司 | Motor control circuit, charging and discharging method, heating method and vehicle |
| CN113997827A (en) * | 2021-05-25 | 2022-02-01 | 南京金邦动力科技有限公司 | Charging loop of power battery system of railway vehicle |
-
2022
- 2022-03-14 CN CN202210245514.8A patent/CN114571969B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206306847U (en) * | 2016-12-27 | 2017-07-07 | 上汽大通汽车有限公司 | Pure motor wagon high-tension distribution box |
| CN109747483A (en) * | 2018-12-10 | 2019-05-14 | 山东国金汽车制造有限公司 | A kind of power battery High-Power PTC heating system and its control method |
| WO2020125771A1 (en) * | 2018-12-21 | 2020-06-25 | 比亚迪股份有限公司 | Motor control circuit, charging and discharging method, heating method and vehicle |
| CN110077281A (en) * | 2019-04-30 | 2019-08-02 | 浙江吉利控股集团有限公司 | A kind of charging heating method and system of plug-in hybrid electric vehicle power battery |
| CN113997827A (en) * | 2021-05-25 | 2022-02-01 | 南京金邦动力科技有限公司 | Charging loop of power battery system of railway vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117698449A (en) * | 2023-11-15 | 2024-03-15 | 湖南麦格米特电气技术有限公司 | Power battery system, control method thereof and electric road-pressing vehicle |
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