CN115158103B - 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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- CN115158103B CN115158103B CN202211010054.7A CN202211010054A CN115158103B CN 115158103 B CN115158103 B CN 115158103B CN 202211010054 A CN202211010054 A CN 202211010054A CN 115158103 B CN115158103 B CN 115158103B
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- 238000007726 management method Methods 0.000 title claims abstract description 88
- 238000010438 heat treatment Methods 0.000 claims abstract description 109
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 12
- 239000000178 monomer Substances 0.000 claims abstract description 5
- 238000004590 computer program Methods 0.000 claims description 15
- 238000010248 power generation Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 8
- 239000007858 starting material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 17
- 229910021389 graphene Inorganic materials 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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Classifications
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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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- Sustainable Energy (AREA)
- Power Engineering (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The embodiment of the invention discloses a power battery thermal management method, a device, a vehicle and a storage medium. The method is characterized in that a set heating plate is arranged on a battery monomer in a battery module in a contact manner, the set heating plate is in communication connection with a battery management unit, and the battery management unit is in communication connection with a processor, and the method comprises the following steps: acquiring the state of a power battery; the duty ratio control signal of the heating plate is generated according to the state of the power battery, the duty ratio control signal is output to the battery management unit, the battery management unit is used for controlling the heating plate to heat the corresponding battery cell according to the duty ratio control signal, so that the thermal management control of the power battery is realized, the heating efficiency of the power battery is improved, and meanwhile, the consumption of energy sources is saved.
Description
Technical Field
The present invention relates to the field of battery thermal management technologies, and in particular, to a method and apparatus for thermal management of a power battery, a vehicle, and a storage medium.
Background
48V power cells are typically placed in the passenger or trunk of the vehicle and are not typically equipped with a thermal management system that passively relies on convection in the environment to reduce temperature, but when ambient temperature is low, the power cells can also have low charge power due to low ambient temperature, resulting in limited battery performance.
In the prior art, the charge and discharge frequency of the battery is improved by a control means, but the time is slower, in addition, a special heating loop or PTC (Positive Temperature Coefficient, thermistor) is arranged, but a set of heating system is arranged for a 48V battery system, so that the cost is increased, the arrangement difficulty is increased, and further, the PTC heating needs to flow through a cooling loop, so that the energy consumption is larger and the heating efficiency is low.
Therefore, how to improve the heating efficiency of the power battery is a problem to be solved.
Disclosure of Invention
The invention provides a power battery thermal management method, a device, a vehicle and a storage medium, which can effectively realize thermal management of a 48V power battery, thereby improving the heating efficiency of the power battery and saving energy.
According to an aspect of the present invention, there is provided a power battery thermal management method including: the battery monomer in the battery module contacts and sets up the heating piece of setting for, set for heating piece 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 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 battery cell through the battery management unit according to the duty ratio control signal.
According to another aspect of the present invention, there is provided a power battery thermal management apparatus comprising:
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 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 battery cell 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 is used for acquiring the power battery state and sending the power battery state to the processor;
And
A memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program 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 the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute the power cell thermal management method according to any one of the embodiments of the present invention.
According to the technical scheme, the state of the power battery is obtained; the duty ratio control signal of the heating plate is generated according to the state of the power battery, and the corresponding battery monomer is heated by the heating plate according to the duty ratio control signal, so that the heating efficiency can be improved, and the energy is saved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for thermal management of a power cell according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a powertrain, according to a first embodiment of the present invention;
fig. 3 is a schematic structural view of a power battery module according to a first embodiment of the present invention;
FIG. 4 is a flow chart of a method for thermal management of a power battery 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 that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise 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 1
Fig. 1 is a flowchart of a power battery thermal management method according to an embodiment of the present invention, where the method may be performed by a power battery thermal management device, which may be implemented in 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:
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 the present embodiment may be a 48V power battery, which is not particularly limited in the present embodiment.
The power battery in this embodiment may be installed as an energy storage unit in a power system for providing a source of power for tools such as automobiles. As shown in fig. 2, the power battery in the present embodiment has the following structure in the entire power system: the 48V motor is connected with the engine through a belt, the 48V motor is connected with a 48V power battery containing a set heating plate through a 48V wire, 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 a generator is connected with the power motor through the belt, the generator is connected with the power battery through a wire, and particularly 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 whole vehicle control unit VCU and the other parts.
The 48V motor is installed in the 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 the 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 may provide electrical power to the generator and to the motor and the DC/DC converter when in motoring mode. The 48V power cell may charge or discharge the generator when operating in a generating mode. Alternatively, the Generator of the present embodiment may be set to 48V, or may be a BSG (Belt-DRIVEN STARTER Generator) motor, that is, an integrated machine that utilizes Belt drive to both start and generate electricity. This embodiment is not particularly limited. When the power battery or BSG capacity is insufficient to start the engine, the starter starts the engine.
In this embodiment, a plurality of power batteries may form a power battery module, and a schematic structural diagram of the power battery module is shown in fig. 3, where the power battery module includes: the graphene heating plates are arranged at the gaps between one battery cell and the other battery cell, the graphene heating plates in the middle of the adjacent battery cells are not limited to one or more, the plurality of battery cells can be flexibly arranged according to the needs, and the embodiment is not particularly limited to the above. Specifically, the battery management unit controls the graphene heating plate to heat the battery monomer through the duty ratio control signal.
And S120, generating a duty ratio control signal for setting the heating plate according to the state of the power battery, outputting the duty ratio control signal to the battery management unit, and controlling the heating plate to heat the corresponding battery cell through the battery management unit according to the duty ratio control signal.
The set heating sheet may be a graphene-containing heating sheet. And outputting the duty ratio control signal to a battery management unit, wherein the battery management unit controls the graphene heating sheet to heat the power battery according to the duty ratio control signal.
Optionally, generating the duty control signal for setting the heating plate according to the state of the power battery may include: and calculating and setting a target duty ratio of the operation of the heating plate according to the temperature of the power battery, and generating a duty ratio control signal through 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 corresponding relation table of temperature and duty ratio is queried according to the temperature table look-up information, a target duty ratio of the graphene heating sheet to work is obtained, and a duty ratio control signal is determined through the target duty ratio.
In this embodiment, the whole vehicle control unit VCU may control the graphene heating sheet to work under load in a duty cycle setting range through a PWM signal of the hard wire port, and specifically, the duty cycle setting range may be 0% -100%, for example, when the duty cycle is 0%, it indicates that the heating sheet is set to be not working; when the duty ratio is 100%, the graphene heating sheet is indicated to work under full load.
In this embodiment, the power system is powered up to power the DC converter DC/DC and the generator. The whole vehicle control unit can calculate the target duty ratio R of the graphene heating sheet according to the temperature table look-up information reported by the power battery, and the corresponding relation between the target duty ratio and the temperature table look-up information is shown in a table 1:
| Temperature/. Degree.C | -30 | -25 | -20 | -15 | -10 | -5 | 0 | 5 | 10 | 15 | 20 |
| Duty cycle% | 100 | 80 | 60 | 50 | 40 | 30 | 20 | 10 | 0 | 0 | 0 |
According to the embodiment, the power battery state is obtained, the duty ratio control signal for setting the heating plate is generated according to the power battery state, and the battery cell corresponding to the heating plate is controlled to be heated according to the duty ratio control signal, so that the heating efficiency of the power battery can be improved, and the energy is saved.
Example two
Fig. 4 is a flowchart of a thermal management method for a power battery according to a second embodiment of the present invention, where after the step of "calculating the target duty ratio for setting the operation of the heating plate according to the temperature of the power battery", the method further includes calculating the target heating power of the heating plate and controlling the engine to start on the basis of the above embodiment. The same terms as those of the above embodiments are not repeated herein. As shown in fig. 4, the method includes:
S410, acquiring the state of the power battery.
S420, calculating and setting a target duty ratio of the operation of the heating plate according to the temperature of the power battery, and generating a duty ratio control signal through the target duty ratio.
S430, calculating target heating power of each set heating plate according to the target duty ratio and rated power of the set heating plate.
The whole vehicle control unit can calculate the target heating power PC of the graphene heating plate according to the target duty ratio R and the rated power Prate of the graphene heating plate.
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 was 2kW, and if 50% was the duty ratio, it means that the target heating power of the graphene heating sheet was 1kW.
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 discharging 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 Pdcdc reported by the dc converter, the discharge power Pbatdis reported by the power battery, the target heating power PC, the engine start power Pstrt, and the charging power Pbatchrg, and control the engine to start according to the power system power request.
Wherein, the engine can carry out water temperature table look-up according to water temperature and starting power, and is specifically shown in table 2:
| Temperature/. Degree.C | -30 | -25 | -20 | -15 | -10 | -5 | 0 | 5 | 10 | 15 | 20 |
| Power of starting machine% | P1 | P2 | P3 | P4 | P5 | P6 | P7 | P8 | P9 | P10 | P11 |
Optionally, determining the power-on request of the power system according to the power consumption of the direct-current converter, the power-on power of the engine, the target heating power and the discharge power reported by the power battery, and sending the power-on request of the power system to control the engine to start may include: performing addition operation on the power consumption of the direct current converter, the set target heating power of the heating plate and the starting power of the engine to obtain a power threshold; when the discharging power is smaller than the power threshold, a power system power starting request is sent to an engine management unit, and the engine management unit controls a starter to start an engine; when the discharge power is larger than the power threshold, a power system power starting request is sent to a motor control unit, and the motor control unit controls the power motor to start the engine.
Specifically, when Pbatdis is less than Pdcdc +Pc+ Pstrt, the whole vehicle control unit sends a power system power starting request to an engine management unit, and the engine management unit controls a starter to start an engine; when Pbatdis is larger than Pdcdc +Pc+ Pstrt, a power system power starting request is sent to a motor control unit, and the motor control unit controls the power motor to start the engine.
Alternatively, 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 plate to the battery management unit; and when the discharge power is larger than the power threshold, outputting a duty ratio control signal for setting the heating plate to the battery management unit.
Specifically, when Pbatdis is less than Pdcdc +Pc+ Pstrt and the engine is started, the whole vehicle control unit VCU sends a duty ratio control signal for the graphene heating plate according to the target duty ratio; when Pbatdis is larger than Pdcdc +Pc+ Pstrt, the whole vehicle control unit VCU directly sends a duty ratio control signal for the graphene heating plate to the battery management unit according to the target duty ratio.
Optionally, when the discharge power is less than the power threshold and the engine is started, outputting the duty 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 is greater than 0, and a duty ratio control signal of the graphene heating plate is output to the battery management unit.
Optionally, controlling engine start according to the powertrain power request includes: and determining the power generation power provided by the engine according to the power consumption of the set heating plate, the power consumption of the direct-current converter, the charging power request of the power battery and the power generation capacity of the power motor.
When the engine works, the whole vehicle control unit can calculate the power generation power provided by the engine according to the target heating power PC of the graphene heating plate, the power consumption of the direct-current converter, the charging power request of the power battery and the power generation capacity of the power motor. The power generation power does not contain extra power except engine starting power and the energy recovery capacity of the power system during whole vehicle energy recovery.
According to the embodiment, the engine starting is controlled according to the target heating power of the heating plate and the judgment of the discharging power and the power threshold, so that the efficiency of heat management of the power battery can be improved, and the consumption of energy sources 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:
A state acquisition module 501, configured to acquire a power battery state;
The heating module 502 is configured to generate a duty control signal for setting the heating plate according to the power battery state, output the duty control signal to the battery management unit, and control the battery management unit to heat the corresponding battery cell according to the duty control signal.
Optionally, generating the duty cycle control signal for setting the heating plate according to the state of the power battery includes:
Calculating and setting a target duty ratio of the heating plate according to the temperature of the power battery, and generating a duty ratio control signal through the target duty ratio;
Optionally, after calculating the target duty ratio of the heating plate according to the temperature of the power battery, the method further comprises: 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 target heating power of the engine starting 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 start request according to the power consumption of the direct current converter, the target heating power of the engine start power and the discharge power reported by the power battery, and sending the power system power request to control the engine to start, including: performing addition operation on the power consumption of the direct current converter, the set target heating power of the heating plate and the starting power of the engine to obtain a power threshold; when the discharging power is smaller than the power threshold, a power system power starting request is sent to an engine management unit, and the engine management unit controls a starter to start an engine; when the discharge power is larger than the power threshold, a power system power starting request is sent to a motor control unit, and the motor control unit controls the power motor to start the engine.
Optionally, outputting the duty cycle 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 plate to the battery management unit; and when the discharge power is larger than the power threshold, outputting a duty ratio control signal for setting the heating plate to the battery management unit.
Optionally, when the discharge power is less than the power threshold and the engine is started, outputting a duty cycle 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 plate to the battery management unit according to the running state of the engine and the actual net torque.
Optionally, controlling engine start according to the powertrain power request includes: and determining the power generation power provided by the engine according to the power consumption of the set heating plate, the power consumption of the direct-current converter, the charging power request of the power battery and the power generation capacity of the power motor.
The power battery thermal management device provided by the embodiment of the invention can execute the power battery thermal management method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 6 shows a schematic structural 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, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 can 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 may 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 telecommunications networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 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, digital Signal Processors (DSPs), and any suitable processors, controllers, microcontrollers, etc. 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 on 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 onto the vehicle 10 via the ROM 12 and/or the communication unit 19. One or more of the steps of a power cell thermal management method described above may be performed when a computer program is loaded into RAM 13 and executed by processor 11. 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 means of firmware).
Various implementations of the systems and techniques described here above can be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On 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, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may 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 implemented. The computer program may execute entirely on the 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. The 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 portable 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 here can 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 may 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 input, speech input, or tactile input.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (4)
1. The utility model provides a power battery thermal management method which characterized in that, set up the heating plate on the battery monomer contact setting in the battery module, set up the heating plate and be connected with battery management unit communication, battery management unit and processor communication connection, include:
Acquiring the state of a power battery;
Generating a duty ratio control signal of the set heating plate according to the power battery state, outputting the duty ratio control signal to the battery management unit, and controlling the set heating plate to heat the corresponding battery cell through the battery management unit according to the duty ratio control signal;
The generating the duty ratio control signal of the set heating plate according to the state of the power battery comprises the following steps:
calculating a target duty ratio of the set heating plate according to the temperature of the power battery, and generating a duty ratio control signal through the target duty ratio;
After calculating the target duty ratio of the set heating plate operation according to the temperature of the power battery, the method further comprises the following steps:
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;
Determining a power system power starting request according to the power consumption of the direct current converter, the starting power of the engine, the target heating power and the discharging power of the power battery, and controlling the engine to start according to the power system power request;
Controlling engine starting according to the powertrain power request, comprising:
Determining the power generation power provided by an engine according to the power consumption of the set heating plate, the power consumption of the direct-current converter, the power charging request of the power battery and the power generation capacity of the power motor;
The power system power starting request is determined according to the power consumption of the direct current converter, the starting power of the engine, the target heating power and the discharge power reported by the power battery, and the power system power request is sent to control the starting of the engine, and the method comprises the following steps:
Performing addition operation on the power consumption of the direct current converter, the set heating plate target heating power and the engine starting power to obtain a power threshold;
When the discharging power is smaller than the power threshold, sending the 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 discharging 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;
the 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 of the set heating plate to the battery management unit;
Outputting a duty ratio control signal of the set heating plate to the battery management unit when the discharge power is greater than the power threshold;
And 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 plate to the battery management unit, wherein the method comprises the following steps:
and when the discharge power is smaller than the power threshold, outputting a duty ratio control signal of the set heating plate to the battery management unit according to the running state of the engine and the actual net torque.
2. A power battery thermal management apparatus for performing the method of claim 1, wherein a set heater strip is disposed in contact with a battery cell within a battery module, the set heater strip being in communication with a battery management unit, the battery management unit being in communication with a processor, comprising:
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 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 battery cell through the battery management unit according to the duty ratio control signal.
3. A vehicle, characterized in that the vehicle comprises:
the battery management unit is connected with the processor bus and is used for acquiring the power battery state and sending the power battery state to the processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the power cell thermal management method of claim 1.
4. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, the computer instructions for causing a processor to perform the power cell thermal management method of claim 1.
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