CN115158103A - Power battery thermal management method and device, vehicle and storage medium - Google Patents
Power battery thermal management method and device, vehicle and storage medium Download PDFInfo
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- CN115158103A CN115158103A CN202211010054.7A CN202211010054A CN115158103A CN 115158103 A CN115158103 A CN 115158103A CN 202211010054 A CN202211010054 A CN 202211010054A CN 115158103 A CN115158103 A CN 115158103A
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- 238000007726 management method Methods 0.000 title claims abstract description 91
- 238000010438 heat treatment Methods 0.000 claims abstract description 107
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- 239000007858 starting material Substances 0.000 claims description 6
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- 238000005265 energy consumption Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- 229910021389 graphene Inorganic materials 0.000 description 15
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
- 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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the invention discloses a power battery thermal management method and device, a vehicle and a storage medium. The method sets up the setting heating plate on the battery monomer contact in the battery module, sets up heating plate and battery management unit communication connection, and battery management unit and treater communication connection include: acquiring the state of a power battery; the duty ratio control signal of the heating sheet is generated and set according to the state of the power battery, the duty ratio control signal is output to the battery management unit, the battery management unit controls the heating sheet to heat the corresponding battery monomer according to the duty ratio control signal, and thermal management control over the power battery is achieved, so that the heating efficiency of the power battery is improved, and meanwhile energy consumption is saved.
Description
Technical Field
The invention relates to the technical field of battery thermal management, in particular to a power battery thermal management method and device, a vehicle and a storage medium.
Background
The 48V power battery is generally arranged in a passenger cab or a trunk of a vehicle, and is not generally provided with a thermal management system, so that the power battery passively depends on convection in the environment to reduce the temperature, but when the ambient temperature is low, the power battery can also become low in charging power due to the low ambient temperature, and the performance of the battery is limited.
In the prior art, the charging and discharging frequency of the battery is improved by a control means, but the time is slow, in addition, a special heating circuit or a PTC (Positive Temperature Coefficient) is also arranged, but the cost is increased and the difficulty of arrangement is increased by arranging a set of heating system for a 48V battery system separately, and further, the energy consumption is large and the heating efficiency is low because the PTC needs to flow through a cooling circuit for heating.
Therefore, how to improve the heating efficiency of the power battery becomes an urgent problem to be solved.
Disclosure of Invention
The invention provides a power battery heat management method, a power battery heat management device, a vehicle and a storage medium, which can effectively realize the heat management of a 48V power battery, thereby improving the heating efficiency of the power battery and saving energy.
According to one aspect of the invention, a power battery thermal management method is provided, and comprises the following steps: contact setting sets for the heating plate on the battery monomer in battery module, set for heating plate and battery management unit communication connection, battery management unit and treater communication connection include:
acquiring the state of a power battery;
and generating a duty ratio control signal of the set heating sheet according to the state of the power battery, outputting the duty ratio control signal to the battery management unit, and controlling the set heating sheet to heat the corresponding battery monomer through the battery management unit according to the duty ratio control signal.
According to another aspect of the invention, a power battery thermal management device is provided, which comprises:
the state acquisition module is used for acquiring the state of the power battery;
and the heating module is used for generating a duty ratio control signal of the set heating sheet according to the state of the power battery, outputting the duty ratio control signal to the battery management unit, and controlling the set heating sheet to heat the corresponding battery monomer through the battery management unit according to the duty ratio control signal.
According to another aspect of the present invention, there is provided a vehicle including:
the battery management unit is connected with the processor bus and used for acquiring the state of the power battery and sending the state of the power battery to the processor;
and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power battery thermal management method according to any embodiment of the invention.
According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to implement the power battery thermal management method according to any one of the embodiments of the present invention when executed.
According to the technical scheme of the embodiment of the invention, the state of the power battery is obtained; the duty ratio control signal for setting the heating sheet is generated according to the state of the power battery, and the heating sheet is controlled and set according to the duty ratio control signal to heat the corresponding single battery, so that the heating efficiency can be improved, and the energy can be saved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for thermal management of a power battery according to an embodiment of the present invention;
FIG. 2 is a block diagram of a powertrain system provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power battery module according to an embodiment of the present invention;
fig. 4 is a flowchart of a power battery thermal management method according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a power battery thermal management device according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a vehicle implementing a thermal management method for a power battery according to a fourth embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a flowchart of a power battery thermal management method according to an embodiment of the present invention, where the embodiment is applicable to a situation of performing thermal management on a vehicle-mounted power battery, and the method may be executed by a power battery thermal management device, where the power battery thermal management device may be implemented in a form of hardware and/or software, and the power battery thermal management device may be configured in a vehicle. As shown in fig. 1, the method includes:
and S110, acquiring the state of the power battery.
The power battery state can be temperature information, charging power, discharging power and the like reported by the power battery.
The power battery in this embodiment may be a 48V power battery, which is not limited in this embodiment.
The power battery in the embodiment can be used as an energy storage unit to be installed in a power system and used for providing a power source for tools such as automobiles and the like. As shown in fig. 2, the structure of the power battery in the present embodiment in the whole power system is: the 48V motor is connected with an engine through a belt, the 48V motor is connected with a 48V power battery containing a set heating sheet through a 48V lead, the power system comprises a motor control unit MCU, a whole vehicle control unit VCU, an engine management unit EMS, a battery management unit BMS, a direct current converter DC/DC control unit DCDCU, a direct current converter DC/DC, a power motor and a speed changer, wherein the generator is connected with the power motor through the belt, the generator is connected with the power battery through a lead, and concretely, the whole vehicle control unit VCU is connected with other parts through a CAN (Controller Area Network) bus and controls the mutual communication of the power motor and the power battery.
The 48V motor is installed in a power system as a generator, the generator can work in an electric mode or a power generation mode, when the generator works in the electric mode, the generator can drag an engine to start, or the generator can assist the engine, and when the generator works in the power generation mode, the generator can be used for adjusting the working point of the engine or recovering the energy of the whole vehicle. The 48V power battery can provide electric energy for the motor and the direct current converter DC/DC when the generator is in the electric mode. The 48V power cell may charge or discharge the generator when operating in the generating mode. Alternatively, the Generator of the present embodiment may be set to 48V, or may be a BSG (Belt-drive Starter Generator) motor, i.e. an integrated machine using a Belt drive for both starting and generating. The present embodiment does not specifically limit this. When the capability of the power battery or the BSG is insufficient to start the engine, the engine is started with the starter.
In this embodiment, a plurality of power batteries may form a power battery module, and the schematic structural diagram of the power battery module is shown in fig. 3, and the power battery module includes: the utility model discloses a battery, including polylith battery monomer, a battery monomer and another battery monomer clearance department is provided with the graphite alkene heating plate, and the graphite alkene heating plate in the middle of the adjacent battery monomer is not limited to one, also can be a plurality ofly, specifically can carry out nimble setting as required, and this embodiment does not do specific restriction to this. Specifically, the battery management unit controls the graphene heating sheet to heat the battery monomer through the duty ratio control signal.
And S120, generating a duty ratio control signal for setting the heating sheet according to the state of the power battery, outputting the duty ratio control signal to a battery management unit, and controlling the setting of the heating sheet to heat the corresponding single battery through the battery management unit according to the duty ratio control signal.
The heating sheet may be a graphene-containing heating sheet. And outputting the duty ratio control signal to a battery management unit, and controlling a graphene heating sheet to heat the power battery by the battery management unit according to the duty ratio control signal.
Optionally, generating the duty ratio control signal for setting the heating sheet according to the state of the power battery may include: and calculating a target duty ratio for setting the working of the heating plate according to the temperature of the power battery, and generating a duty ratio control signal according to the target duty ratio. For example, the power battery state may include temperature table look-up information reported by the battery management unit, a preset temperature and duty ratio correspondence table is queried according to the temperature table look-up information, a target duty ratio of the operation of the graphene heating sheet is obtained, and the duty ratio control signal is determined according to the target duty ratio.
In this embodiment, the vehicle control unit VCU may control the graphene heating sheet to work under load within a duty ratio setting range through a PWM signal of the hard-wire port, specifically, the duty ratio setting range may be 0% to 100%, for example, when the duty ratio is 0%, it indicates that the setting heating sheet does not work; when the duty ratio is 100%, the full-load operation of the graphene heating sheet is represented.
In this embodiment, the power system powers up to provide power to the DC converter DC/DC and the generator. The entire vehicle control unit can calculate a target duty ratio R of the working of the graphene heating sheet according to the temperature table look-up information reported by the power battery, and as shown in table 1, the target duty ratio and the temperature table look-up information correspond to each other:
| temperature/. Degree.C | -30 | -25 | -20 | -15 | -10 | -5 | 0 | 5 | 10 | 15 | 20 |
| Duty ratio% | 100 | 80 | 60 | 50 | 40 | 30 | 20 | 10 | 0 | 0 | 0 |
According to the embodiment, the power battery state is acquired, the duty ratio control signal for setting the heating sheet is generated according to the power battery state, and the setting of the heating sheet to heat the corresponding battery monomer is controlled according to the duty ratio control signal, so that the heating efficiency of the power battery can be improved, and the energy can be saved.
Example two
Fig. 4 is a flowchart of a power battery thermal management method according to a second embodiment of the present invention, where on the basis of the second embodiment of the present invention, after the step "calculating and setting the target duty ratio of the operation of the heater chip according to the temperature of the power battery", the present embodiment further includes calculating the target heating power of the heater chip and controlling the engine to start. The same terms as those of the above embodiments are not described herein. As shown in fig. 4, the method includes:
and S410, acquiring the state of the power battery.
And S420, calculating and setting a target duty ratio of the heating sheet according to the temperature of the power battery, and generating a duty ratio control signal according to the target duty ratio.
And S430, calculating the target heating power of each set heating plate according to the target duty ratio and the rated power of the set heating plate.
The whole vehicle control unit can calculate the target heating power PC of the graphene heating sheet according to the target duty ratio R and the rated power Prate of the graphene heating sheet.
Specifically, the target heating power may be calculated based on the following formula:
PC＝R*Prate。
for example: the rated power of the graphene heating sheet is 2kW, and if 50% is the duty ratio, the target heating power of the graphene heating sheet is 1kW.
And S440, determining a power system power starting request according to the power consumption of the direct current converter, the engine starting power, the target heating power and the discharge power of the power battery, and controlling the engine to start according to the power system power request.
In this embodiment, the vehicle control unit may calculate a power system power start request according to the power consumption pdccc reported by the dc converter, the discharge power Pbatdis, the target heating power PC, the engine start power Pstrt, and the charging power Pbatchrg reported by the power battery, and control the engine to start according to the power system power request.
Wherein, the engine can carry out the temperature look-up table according to temperature and the power of getting on the start, specifically as shown in table 2:
| temperature/. Degree.C | -30 | -25 | -20 | -15 | -10 | -5 | 0 | 5 | 10 | 15 | 20 |
| Power of lifting machine% | P1 | P2 | P3 | P4 | P5 | P6 | P7 | P8 | P9 | P10 | P11 |
Optionally, determining a power system power startup request according to the power consumption of the dc converter, the engine startup power, the target heating power, and the discharge power reported by the power battery, and sending the power system power request to control the engine to start may include: performing addition operation on the power consumption of the DC converter, the set heating sheet target heating power and the engine starting power to obtain a power threshold; when the discharge power is smaller than the power threshold, sending a power system power starting request to an engine management unit, and controlling a starter to start the engine through the engine management unit; when the discharge power is larger than the power threshold, sending a power system power starting request to the motor control unit, and controlling the power motor to start the engine through the motor control unit.
Specifically, when Pbatdis is less than Pdcdc + Pc + Pstrt, the whole vehicle control unit sends a power system power starting request to the engine management unit, and the engine management unit controls the starter to start the engine; and when Pbatdis is greater than Pdcdc + Pc + Pstrt, sending a power system power starting request to the motor control unit, and controlling the power motor to start the engine through the motor control unit.
Optionally, outputting the duty ratio control signal to the battery management unit may include: when the discharge power is smaller than the power threshold and the engine is started, outputting a duty ratio control signal for setting the heating sheet to the battery management unit; and when the discharge power is greater than the power threshold, outputting a duty ratio control signal for setting the heating sheet to the battery management unit.
Specifically, when Pbatdis < pdcc + Pc + Pstrt and the engine is started, the vehicle control unit VCU sends a duty ratio control signal to the graphene heating sheet according to a target duty ratio; when Pbatdis > Pdcdc + Pc + Pstrt, the vehicle control unit VCU directly sends a duty ratio control signal to the graphene heating sheet to the battery management unit according to the target duty ratio.
Optionally, when the discharge power is smaller than the power threshold and the engine is started completely, outputting a duty ratio control signal for setting the heating plate to the battery management unit may include: and when the discharge power is smaller than the power threshold, outputting a duty ratio control signal for setting the heating plate to the battery management unit according to the running state of the engine and the actual net torque.
After the engine is started, the state reported by the generator can be represented by Run, the actual net torque of the generator is greater than 0, and a duty ratio control signal of the graphene heating sheet is output to the battery management unit.
Optionally, controlling engine starting according to the powertrain power request comprises: and determining the generating power provided by the engine according to the set power consumption of the heating sheet, the power consumption of the direct current converter, the power request of the power battery and the generating capacity of the power motor.
When the engine works, the whole vehicle control unit can calculate the generating power provided by the engine according to the target heating power PC of the graphene heating sheet, the power consumption of the direct current converter, the charging power request of the power battery and the generating capacity of the power motor. The generated power does not contain extra power beyond the starting power of the engine and the energy recovery capability of a power system during the energy recovery of the whole vehicle.
According to the embodiment, the engine is controlled to start according to the target heating power of the heating sheet and the judgment of the discharge power and the power threshold, so that the heat management efficiency of the power battery can be improved, and the energy consumption is further saved.
EXAMPLE III
Fig. 5 is a schematic structural diagram of a power battery thermal management device according to a third embodiment of the present invention. As shown in fig. 5, the apparatus includes:
the state acquisition module 501 is used for acquiring the state of the power battery;
the heating module 502 is configured to generate a duty ratio control signal for setting the heating sheet according to the state of the power battery, output the duty ratio control signal to the battery management unit, and control the setting of the heating sheet to heat the corresponding battery cell according to the duty ratio control signal through the battery management unit.
Optionally, the generating of the duty ratio control signal for setting the heating sheet according to the state of the power battery includes:
calculating a target duty ratio for setting the working of the heating sheet according to the temperature of the power battery, and generating a duty ratio control signal according to the target duty ratio;
optionally, after the target duty ratio of the operation of the heating plate is calculated and set according to the temperature of the power battery, the method further includes: calculating the target power of each set heating plate according to the target duty ratio and the rated power of the set heating plate; and determining a power system power starting request according to the power consumption of the direct current converter, the engine starting power target heating power and the discharge power of the power battery, and controlling the engine to start according to the power system power request.
Optionally, determining a power system power startup request according to power consumption of the dc converter, target heating power of engine startup power, and discharge power reported by the power battery, and sending the power system power request to control engine startup, including: adding the power consumption of the DC converter, the set heating sheet target heating power and the engine starting power to obtain a power threshold; when the discharge power is smaller than a power threshold, sending a power system power starting request to an engine management unit, and controlling a starter to start an engine through the engine management unit; when the discharge power is larger than the power threshold, sending a power system power starting request to the motor control unit, and controlling the power motor to start the engine through the motor control unit.
Optionally, outputting the duty ratio control signal to the battery management unit includes: when the discharge power is smaller than the power threshold and the engine is started, outputting a duty ratio control signal for setting the heating sheet to the battery management unit; and when the discharge power is greater than the power threshold, outputting a duty ratio control signal for setting the heating sheet to the battery management unit.
Optionally, when the discharge power is smaller than the power threshold and the engine is started completely, outputting a duty ratio control signal for setting the heating plate to the battery management unit, including: and when the discharge power is smaller than the power threshold, outputting a duty ratio control signal for setting the heating sheet to the battery management unit according to the running state of the engine and the actual net torque.
Optionally, controlling engine starting according to the powertrain power request comprises: and determining the generating power provided by the engine according to the set power consumption of the heating sheet, the power consumption of the direct current converter, the power request of the power battery and the generating capacity of the power motor.
The power battery heat management device provided by the embodiment of the invention can execute the power battery heat management method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
FIG. 6 illustrates a schematic block diagram of a vehicle 10 that may be used to implement an embodiment of the present invention. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 6, the vehicle 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the vehicle 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the vehicle 10 are connected to the I/O interface 15, including: an input unit 16, an output unit 17, a storage unit 18, and a communication unit 19. The communication unit 19 allows the vehicle 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processors 11 include, but are not limited to, a Vehicle Control Unit (VCU), a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various dedicated Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 performs the various methods and processes described above, such as a power cell thermal management method.
In some embodiments, a power cell thermal management method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed on the vehicle 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of a power cell thermal management method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform a power cell thermal management method by any other suitable means (e.g., by way of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), complex Programmable Logic Devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described herein may be implemented on a vehicle having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired result of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a power battery thermal management method, characterized by, contact setting heating plate on the battery monomer in the battery module, set up heating plate and battery management unit communication connection, battery management unit and treater communication connection include:
acquiring the state of a power battery;
generating a duty ratio control signal of the set heating plate according to the state of the power battery, outputting the duty ratio control signal to the battery management unit, and controlling the set heating plate to heat the corresponding single battery through the battery management unit according to the duty ratio control signal.
2. The method of claim 1, wherein generating the duty cycle control signal to set the heater chip based on the power cell state comprises:
and calculating the target duty ratio of the set heating sheet according to the temperature of the power battery, and generating a duty ratio control signal according to the target duty ratio.
3. The method of claim 2, further comprising, after calculating the target duty cycle for operation of the set heat patch based on the power cell temperature:
calculating the target heating power of each set heating plate according to the target duty ratio and the rated power of the set heating plate;
and determining a power system power starting request according to the power consumption of the direct current converter, the engine starting power, the target heating power and the discharge power of the power battery, and controlling the engine to start according to the power system power request.
4. The method of claim 3, wherein determining a power system power start request based on the power consumption of the DC converter, the engine start power, the target heating power, and the discharge power reported by the power battery, and sending the power system power request to control engine starting comprises:
adding the power consumption of the direct current converter, the set heating sheet target heating power and the engine starting power to obtain a power threshold;
when the discharge power is smaller than the power threshold, sending a power system power starting request to an engine management unit, and controlling a starter to start an engine through the engine management unit;
and when the discharge power is larger than the power threshold, sending the power system power starting request to a motor control unit, and controlling a power motor to start an engine through the motor control unit.
5. The method of claim 4, wherein outputting the duty cycle control signal to the battery management unit comprises:
when the discharge power is smaller than the power threshold and the engine is started, outputting a duty ratio control signal of the set heating sheet to the battery management unit;
and when the discharge power is greater than the power threshold, outputting a duty ratio control signal for setting the heating sheet to the battery management unit.
6. The method of claim 5, wherein outputting the duty cycle control signal for setting the heater chip to the battery management unit after the discharge power is less than the power threshold and the engine is started comprises:
and when the discharge power is smaller than the power threshold, outputting a duty ratio control signal for setting the heating sheet to the battery management unit according to the running state of the engine and the actual net torque.
7. The method of claim 3, wherein controlling engine starting based on the powertrain power request comprises:
and determining the generating power provided by the engine according to the power consumption of the set heating plate, the power consumption of the direct current converter, the power request of the power battery and the generating capacity of the power motor.
8. The utility model provides a power battery heat management device which characterized in that, contact setting on the battery monomer in the battery module sets up the heating plate, set up the heating plate and be connected with battery management unit communication, battery management unit and treater communication connection include:
the state acquisition module is used for acquiring the state of the power battery;
and the heating module is used for generating a duty ratio control signal of the set heating sheet according to the state of the power battery, outputting the duty ratio control signal to the battery management unit, and controlling the set heating sheet to heat the corresponding single battery through the battery management unit according to the duty ratio control signal.
9. A vehicle, characterized in that the vehicle comprises:
the battery management unit is connected with the processor bus and used for acquiring the state of the power battery and sending the state of the power battery to the processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the power cell thermal management method of any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to implement the power battery thermal management method according to any one of claims 1-7 when executed.
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