CN112824138A - Vehicle power battery temperature control method and device, storage medium and vehicle - Google Patents
Vehicle power battery temperature control method and device, storage medium and vehicle Download PDFInfo
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- CN112824138A CN112824138A CN201911150728.1A CN201911150728A CN112824138A CN 112824138 A CN112824138 A CN 112824138A CN 201911150728 A CN201911150728 A CN 201911150728A CN 112824138 A CN112824138 A CN 112824138A
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- power battery
- vehicle
- control instruction
- temperature threshold
- preset temperature
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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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- 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
Abstract
The disclosure relates to a vehicle power battery temperature control method and device, a storage medium and a vehicle. The method comprises the following steps: if the power battery meets the preset charging end condition, monitoring the ambient temperature and the temperature of the power battery; if the monitored environment temperature is smaller than a first preset temperature threshold value and the temperature of the power battery is smaller than a second preset temperature threshold value, sending a first control instruction to the vehicle-mounted charger, wherein the first control instruction is used for controlling the vehicle-mounted charger to keep the temperature of the power battery; and in the process that the vehicle-mounted charger keeps the temperature of the power battery, if the temperature of the power battery is monitored to be lower than a third preset temperature threshold value, sending a second control instruction to the thermal management control unit, wherein the second control instruction is used for controlling the thermal management control unit to heat the power battery. After the charging process is finished, the performance of the power battery is always in a better state, and the power battery can provide good power support for the vehicle whenever the user uses the vehicle.
Description
Technical Field
The disclosure relates to the field of vehicle batteries, in particular to a vehicle power battery temperature control method and device, a storage medium and a vehicle.
Background
In a low-temperature environment, the charging and discharging performance of the power battery of the vehicle is reduced, which results in the reduction of the driving range of the vehicle in the low-temperature environment (e.g., in winter), and meanwhile, the service life of the power battery is also affected by the low temperature. Therefore, heating the power battery in a low-temperature environment is a necessary means for ensuring the safe and efficient operation of the power battery in the low-temperature environment. In the related art, the power battery is generally heated during the charging process of the vehicle, so that the power battery is in a good state. In this way, however, the heating of the power battery is stopped after the end of the charging process, that is to say, the power battery is not kept warm once the charging has ended. Therefore, if a user uses the vehicle after charging for a while, the temperature of the power battery cannot be guaranteed to be in a proper temperature range, the power battery cannot be guaranteed to be in a better working state, the performance of the power battery cannot be guaranteed, and the performance of the vehicle cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a vehicle power battery temperature control method, a vehicle power battery temperature control device, a storage medium and a vehicle, so as to improve the performance of a power battery.
In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a vehicle power battery temperature control method including:
if the power battery meets the preset charging end condition, monitoring the ambient temperature and the temperature of the power battery;
if the monitored environment temperature is smaller than a first preset temperature threshold value and the temperature of the power battery is smaller than a second preset temperature threshold value, sending a first control instruction to a vehicle-mounted charger, wherein the first control instruction is used for controlling the vehicle-mounted charger to keep the temperature of the power battery, and the first preset temperature threshold value is smaller than the second preset temperature threshold value;
and in the process of heat preservation of the power battery by the vehicle-mounted charger, if the temperature of the power battery is monitored to be smaller than a third preset temperature threshold value, sending a second control instruction to a thermal management control unit, wherein the second control instruction is used for controlling the thermal management control unit to heat the power battery, and the third preset temperature threshold value is larger than the first preset temperature threshold value and smaller than the second preset temperature threshold value.
Optionally, the first control instruction carries first working parameter information corresponding to the vehicle-mounted charger, and the second control instruction carries second working parameter information corresponding to the thermal management control unit.
Optionally, after the step of sending a second control instruction to the thermal management control unit, the method further comprises:
if the power battery temperature is monitored to be greater than or equal to a fourth preset temperature threshold, sending a third control instruction to the thermal management control unit, wherein the third control instruction is used for controlling the thermal management control unit to stop heating the power battery, and the fourth preset temperature threshold is greater than the third preset temperature threshold and smaller than the second preset temperature threshold.
Optionally, if it is monitored that the ambient temperature is less than a first preset temperature threshold and the temperature of the power battery is less than a second preset temperature threshold, the method further includes:
sending a fourth control instruction to the vehicle-mounted charger, wherein the fourth control instruction is used for controlling the vehicle-mounted charger to stop charging the power battery; and the number of the first and second groups,
and under the condition that the vehicle-mounted charger is determined to stop charging the power battery, the step of sending a first control instruction to the vehicle-mounted charger is executed.
Optionally, the method further comprises:
determining whether the vehicle meets a preset heat preservation end condition or not in the process of preserving heat of the power battery by the vehicle-mounted charger;
and if the fact that the vehicle meets the preset heat preservation end condition is determined, sending a fifth control instruction to the vehicle-mounted charger, wherein the fifth control instruction is used for controlling the vehicle-mounted charger to stop preserving heat of the power battery.
Optionally, if it is monitored that the ambient temperature is less than a first preset temperature threshold and the temperature of the power battery is less than a second preset temperature threshold, the method further includes:
determining whether a charging heat preservation function is started;
and under the condition that the charging heat preservation function is started, the step of sending a first control instruction to the vehicle-mounted charger is executed again.
According to a second aspect of the present disclosure, there is provided a vehicle power battery temperature control apparatus, the apparatus including:
the monitoring module is used for monitoring the ambient temperature and the temperature of the power battery if the power battery meets a preset charging end condition;
the first instruction sending module is used for sending a first control instruction to a vehicle-mounted charger if the monitored environment temperature is smaller than a first preset temperature threshold and the temperature of the power battery is smaller than a second preset temperature threshold, wherein the first control instruction is used for controlling the vehicle-mounted charger to keep the temperature of the power battery, and the first preset temperature threshold is smaller than the second preset temperature threshold;
and the second instruction sending module is used for sending a second control instruction to the thermal management control unit if the temperature of the power battery is monitored to be smaller than a third preset temperature threshold in the heat preservation process of the power battery by the vehicle-mounted charger, wherein the second control instruction is used for controlling the thermal management control unit to heat the power battery, and the third preset temperature threshold is larger than the first preset temperature threshold and smaller than the second preset temperature threshold.
Optionally, the first control instruction carries first working parameter information corresponding to the vehicle-mounted charger, and the second control instruction carries second working parameter information corresponding to the thermal management control unit.
Optionally, the apparatus further comprises:
and the third instruction sending module is used for sending a third control instruction to the thermal management control unit if the temperature of the power battery is monitored to be greater than or equal to a fourth preset temperature threshold after the second instruction sending module sends a second control instruction to the thermal management control unit, wherein the third control instruction is used for controlling the thermal management control unit to stop heating the power battery, and the fourth preset temperature threshold is greater than the third preset temperature threshold and is smaller than the second preset temperature threshold.
Optionally, the apparatus further comprises:
the fourth instruction sending module is used for sending a fourth control instruction to the vehicle-mounted charger if the monitored environment temperature is smaller than a first preset temperature threshold and the monitored power battery temperature is smaller than a second preset temperature threshold, wherein the fourth control instruction is used for controlling the vehicle-mounted charger to stop charging the power battery; and the number of the first and second groups,
the first instruction sending module is used for sending a first control instruction to the vehicle-mounted charger under the condition that the vehicle-mounted charger is determined to stop charging the power battery.
Optionally, the apparatus further comprises:
the first determining module is used for determining whether the vehicle meets a preset heat preservation end condition or not in the heat preservation process of the vehicle-mounted charger on the power battery;
and the fifth instruction sending module is used for sending a fifth control instruction to the vehicle-mounted charger if the vehicle is determined to meet the preset heat preservation end condition, wherein the fifth control instruction is used for controlling the vehicle-mounted charger to stop preserving heat of the power battery.
Optionally, the apparatus further comprises:
the second determination module is used for determining whether the charging and heat-preserving function is started or not if the environment temperature is monitored to be smaller than a first preset temperature threshold and the temperature of the power battery is monitored to be smaller than a second preset temperature threshold;
the first instruction sending module is used for sending a first control instruction to a vehicle-mounted charger under the condition that the charging heat preservation function is started.
According to a third aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of the first aspect of the present disclosure.
According to a fourth aspect of the present disclosure, there is provided a vehicle comprising: the battery management system comprises a battery management unit, a vehicle-mounted charger, a thermal management control unit and a direct current/direct current converter, wherein the battery management unit is used for executing the steps of the method of the first aspect of the disclosure.
According to the technical scheme, if the power battery meets the preset charging end condition, the ambient temperature and the power battery temperature are monitored, if the monitored ambient temperature is smaller than a first preset temperature threshold value and the power battery temperature is smaller than a second preset temperature threshold value, a first control instruction is sent to the vehicle-mounted charger, and if the monitored power battery temperature is smaller than a third preset temperature threshold value in the heat preservation process of the vehicle-mounted charger on the power battery, a second control instruction is sent to the thermal management control unit. Therefore, after the charging process is finished, the heat preservation can be still carried out on the power battery, the power battery is always in a proper temperature range, the performance of the power battery is always in a better state, and the power battery can provide good power support for the vehicle whenever the user uses the vehicle.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart of a method of controlling a temperature of a power battery of a vehicle provided according to one embodiment of the present disclosure;
FIG. 2 is a block diagram of a vehicle power cell temperature control apparatus provided in accordance with one embodiment of the present disclosure;
FIG. 3 is a block diagram of a vehicle shown in accordance with an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
First, a brief introduction is made to an application scenario of the present disclosure. The vehicle related in the scheme of the disclosure can comprise a battery management unit, a vehicle-mounted charger, a thermal management control unit and a direct current/direct current converter. The battery management unit is responsible for monitoring and reporting the state of the power battery, and simultaneously sends a control instruction to the vehicle-mounted charger, the thermal management control unit and the direct current/direct current converter so as to control the equipment to work. The vehicle-mounted charger can convert alternating current into direct current according to a control instruction of the battery management unit to charge the power battery, and generally realizes alternating current charging of a vehicle by using the vehicle-mounted charger. The thermal management control unit can perform thermal management control to heat the power battery. The dc/dc converter is capable of converting high voltage dc to low voltage (e.g., 12V) to power the vehicle low voltage system and to charge the battery.
Fig. 1 is a flowchart of a vehicle power battery temperature control method provided according to an embodiment of the present disclosure. For example, the method of the present disclosure may be applied to a control unit of a vehicle, such as a battery management unit. As shown in fig. 1, the method may include the following steps.
In step 11, if the power battery meets the preset charging end condition, the ambient temperature and the power battery temperature are monitored.
During the charging process of the vehicle, the external power supply source (for example, a charging pile) continuously charges the power battery, when the power battery meets the preset charging end condition, the current charging process can be ended, and at the moment, the ambient temperature and the temperature of the power battery can be monitored. The preset charge end condition may be any one or more of the following: the charging time reaches a preset time, the temperature of the power battery reaches a preset temperature value, and the electrical parameters (such as voltage value, voltage change rate, voltage rise value, maximum voltage, SOC) of the power battery reach preset parameter values.
Because the power battery generally comprises a plurality of battery cores, the temperature of the power battery can be determined in various ways. For example, the average value of the temperatures of the individual cells in the power battery may be used as the power battery temperature. For another example, the minimum value of the temperatures of the battery cells of the power battery can be used as the temperature of the power battery, so that the temperature value of the battery cell with the lowest temperature represents the temperature of the power battery, and the overall performance of the power battery can be better ensured in subsequent processing.
Through step 11, after the power battery meets the preset charging end condition, the ambient temperature and the power battery temperature are continuously monitored, so that a basis is provided for temperature control of the power battery.
In step 12, if it is monitored that the ambient temperature is less than the first preset temperature threshold and the temperature of the power battery is less than the second preset temperature threshold, a first control instruction is sent to the vehicle-mounted charger.
If the environmental temperature is less than the first preset temperature threshold and the temperature of the power battery is less than the second preset temperature threshold, the power battery is in a low-temperature environment and the temperature of the power battery is low, and at the moment, the power battery needs to be insulated. Therefore, the first control instruction can be sent to the vehicle-mounted charger. The first preset temperature threshold is smaller than the second preset temperature threshold, because the heat preservation of the power battery is necessary only when the ambient temperature is lower than the temperature of the power battery.
In order to ensure the performance of the power battery, the power battery needs to be kept at a proper temperature, and the power battery has a heat preservation requirement (including a heat preservation temperature and a heat preservation time length which can be set by a user, wherein the heat preservation temperature is preferably the optimal working temperature of the power battery). Therefore, according to the heat preservation requirement of the power battery, the first preset temperature threshold value and the second preset temperature threshold value can be determined.
For example, the first preset temperature threshold and the second preset temperature threshold may be calculated as follows:
the first preset temperature threshold may be determined according to the following equation: the current lowest temperature of the power battery-the temperature drop rate of the power battery under a first preset temperature threshold value and the heat preservation time length are more than or equal to the heat preservation temperature;
the second preset temperature threshold may be determined according to the following equation: and a second preset temperature threshold value-the temperature drop rate of the power battery at the current ambient temperature and the heat preservation time length are more than or equal to the heat preservation temperature.
The temperature drop rate of the power battery is influenced by the ambient temperature, and meanwhile, the temperature drop rate of the power battery under various ambient temperatures can be known, for example, the temperature drop conditions of the power battery under various ambient temperatures are collected in advance to form the relationship between the ambient temperature and the temperature drop rate of the power battery, and under the condition that the ambient temperature is known, the corresponding temperature drop rate of the battery can be determined.
The first control instruction is used for controlling the vehicle-mounted charger to preserve heat of the power battery. For example, the first control instruction may carry first working parameter information corresponding to the vehicle-mounted battery charger, and after receiving the first control instruction, the vehicle-mounted battery charger may work according to the first working parameter information carried by the first control instruction. The first operating parameter information may include, for example, a heat-preservation voltage and a heat-preservation current, and the vehicle-mounted charger may output the heat-preservation voltage and the heat-preservation current to the power battery, and may be adaptively adjusted according to an actual load. For example, the holding voltage may be 350V, and the holding current may be 2A.
In addition, when the first control instruction is sent to the vehicle-mounted charger, the direct current/direct current converter can be controlled to work at the same time.
In step 13, in the process that the vehicle-mounted charger keeps the temperature of the power battery, if the temperature of the power battery is monitored to be lower than a third preset temperature threshold, a second control instruction is sent to the thermal management control unit.
In the process of heat preservation of the power battery by the vehicle-mounted charger, if the temperature of the power battery is monitored to be lower than a third preset temperature threshold value, the temperature of the power battery is reduced, and the temperature is reduced to a temperature value which affects the performance of the power battery, and at the moment, the power battery needs to be heated. Thus, the second control instruction may be sent to the thermal management control unit. The third preset temperature threshold may be obtained through an actual vehicle test experience value (for example, the lowest allowable temperature of the power battery that does not affect the vehicle operation is obtained through an actual vehicle test), and a value of the third preset temperature threshold may be greater than the first preset temperature threshold and smaller than the second preset temperature threshold.
And the second control instruction is used for controlling the thermal management control unit to heat the power battery. For example, the second control instruction may carry second working parameter information corresponding to the thermal management control unit, and after receiving the second control instruction, the thermal management control unit may work according to the second working parameter information carried by the second control instruction, for example, control the heating device to work by using the second working parameter information. The second operating parameter information may be, for example, heating power, heating level, etc.
According to the technical scheme, if the power battery meets the preset charging end condition, the ambient temperature and the power battery temperature are monitored, if the monitored ambient temperature is smaller than a first preset temperature threshold value and the power battery temperature is smaller than a second preset temperature threshold value, a first control instruction is sent to the vehicle-mounted charger, and if the monitored power battery temperature is smaller than a third preset temperature threshold value in the heat preservation process of the vehicle-mounted charger on the power battery, a second control instruction is sent to the thermal management control unit. Therefore, after the charging process is finished, the heat preservation can be still carried out on the power battery, the power battery is always in a proper temperature range, the performance of the power battery is always in a better state, and the power battery can provide good power support for the vehicle whenever the user uses the vehicle.
In a possible embodiment, after step 13 sending the second control instruction to the thermal management control unit, the method provided by the present disclosure may further include the steps of:
and if the monitored temperature of the power battery is greater than or equal to a fourth preset temperature threshold value, sending a third control instruction to the thermal management control unit.
After the thermal management control unit sends the second control instruction, the thermal management control unit starts to heat the power battery. In the process that the thermal management control unit heats the battery, if the temperature of the power battery is monitored to be greater than or equal to the fourth preset temperature threshold, the power battery is heated and then rises, and the temperature range capable of ensuring the performance of the power battery is recovered, and at this time, the power battery does not need to be heated. Thus, the third control instruction may be sent to the thermal management control unit. The fourth preset temperature threshold is obtained through an empirical value (for example, the upper temperature limit of the power battery and the heating hysteresis temperature of the power battery, which do not affect the operation of the vehicle), and the value range of the fourth preset temperature threshold may be larger than the third preset temperature threshold and smaller than the second preset temperature threshold.
And the third control instruction is used for controlling the thermal management control unit to stop heating the power battery. For example, the third control instruction may control the thermal management control unit to stop working, so that the thermal management control unit may stop working after receiving the third control instruction, and thus the power battery is not heated any more.
By adopting the mode, the heating of the power battery is stopped when the power battery meets the requirement, and the workload of each part of the vehicle is reduced on the premise of ensuring the performance of the power battery so as to maintain the performance of the power battery.
In a possible embodiment, in step 12, if it is monitored that the ambient temperature is less than the first preset temperature threshold and the power battery temperature is less than the second preset temperature threshold, the method provided by the present disclosure may further include the following steps:
sending a fourth control instruction to the vehicle-mounted charger;
and under the condition that the vehicle is determined to stop charging the power battery by the charger, sending a first control instruction to the vehicle-mounted charger.
As described above, if it is monitored that the ambient temperature is less than the first preset temperature threshold and the temperature of the power battery is less than the second preset temperature threshold, and the power battery meets the preset charging end condition, the charging of the power battery can be ended. Therefore, the fourth control instruction may be sent to the onboard charger.
And the fourth control instruction is used for controlling the vehicle-mounted charger to stop charging the power battery. For example, the fourth control instruction may be a standby instruction, and the vehicle-mounted charger switches to a standby state after receiving the instruction, stops charging the power battery, and can quickly enter the working state to keep the power battery warm. In addition, in addition to enabling the vehicle-mounted charger to enter the standby state, the fourth control instruction may also carry a standby voltage and a standby current, where the standby voltage may be similar to the power battery voltage, for example, equal to the power battery voltage, and the standby current may be, for example, 0. Therefore, no load can be ensured when the main positive/negative contactor is disconnected, the adhesion of the contactors is prevented, and the damage of a vehicle or a battery is avoided.
And when the fact that the vehicle stops charging the power battery by the charger is determined, the first control instruction is sent to the vehicle-mounted charger, and the vehicle-mounted charger is prevented from being disordered in work.
In addition, when the fourth control instruction is sent to the vehicle-mounted charger, the direct current/direct current converter can be controlled to stop working at the same time.
In one possible real-time manner, the method provided by the present disclosure may further include the steps of:
in the process of preserving heat of a power battery by a vehicle-mounted charger, determining whether the vehicle meets a preset heat preservation end condition;
and if the fact that the vehicle meets the preset heat preservation end condition is determined, sending a fifth control instruction to the vehicle-mounted charger.
And the fifth control instruction is used for controlling the vehicle-mounted charger to stop keeping the temperature of the power battery. The preset incubation end conditions may include, but are not limited to, the following: battery management unit failure, vehicle-mounted charger failure, direct current/direct current converter failure, thermal management control unit failure.
In a possible embodiment, in step 12, if it is monitored that the ambient temperature is less than the first preset temperature threshold and the power battery temperature is less than the second preset temperature threshold, the method provided by the present disclosure may further include the following steps:
determining whether a charging heat preservation function is started;
and under the condition that the charging heat preservation function is started, sending a first control instruction to a vehicle-mounted charger.
For example, a charge and warm-up switch may be disposed on the vehicle, and a user may switch an on state of the charge and warm-up function through the charge and warm-up switch, where the charge and warm-up switch may be a physical switch, a virtual key, or the like. For another example, the user may establish a connection with the vehicle through the terminal, thereby controlling the on state of the charge warm function through the terminal.
And under the condition that the user starts the charging and heat preservation function, the related steps of heat preservation and heating of the power battery provided by the disclosure are executed.
By adopting the mode, the selection inlet of the heat preservation function is provided for the user, so that the relevant steps are executed under the condition that the user needs to preserve heat of the power battery, and the relevant steps are not executed under the condition that the user does not need the function, so that the charging heat preservation function is more in line with the actual requirements of the user.
Fig. 2 is a block diagram of a vehicle power battery temperature control apparatus provided according to an embodiment of the present disclosure. As shown in fig. 2, the apparatus 20 includes:
the monitoring module 21 is configured to monitor an ambient temperature and a temperature of the power battery if the power battery meets a preset charging end condition;
the first instruction sending module 22 is configured to send a first control instruction to a vehicle-mounted charger if it is monitored that the ambient temperature is smaller than a first preset temperature threshold and the temperature of the power battery is smaller than a second preset temperature threshold, where the first control instruction is used for controlling the vehicle-mounted charger to keep the temperature of the power battery, and the first preset temperature threshold is smaller than the second preset temperature threshold;
and a second instruction sending module 23, configured to send a second control instruction to a thermal management control unit if it is monitored that the temperature of the power battery is less than a third preset temperature threshold in the process of heat preservation of the power battery by the vehicle-mounted charger, where the second control instruction is used to control the thermal management control unit to heat the power battery, and the third preset temperature threshold is greater than the first preset temperature threshold and is less than the second preset temperature threshold.
Optionally, the first control instruction carries first working parameter information corresponding to the vehicle-mounted charger, and the second control instruction carries second working parameter information corresponding to the thermal management control unit.
Optionally, the apparatus 20 further comprises:
and a third instruction sending module, configured to send a third control instruction to the thermal management control unit if it is monitored that the temperature of the power battery is greater than or equal to a fourth preset temperature threshold after the second instruction sending module 23 sends the second control instruction to the thermal management control unit, where the third control instruction is used to control the thermal management control unit to stop heating the power battery, and the fourth preset temperature threshold is greater than the third preset temperature threshold and is smaller than the second preset temperature threshold.
Optionally, the apparatus 20 further comprises:
the fourth instruction sending module is used for sending a fourth control instruction to the vehicle-mounted charger if the monitored environment temperature is smaller than a first preset temperature threshold and the monitored power battery temperature is smaller than a second preset temperature threshold, wherein the fourth control instruction is used for controlling the vehicle-mounted charger to stop charging the power battery; and the number of the first and second groups,
the first instruction sending module 22 is configured to send a first control instruction to the vehicle-mounted charger when it is determined that the vehicle-mounted charger has stopped charging the power battery.
Optionally, the apparatus 20 further comprises:
the first determining module is used for determining whether the vehicle meets a preset heat preservation end condition or not in the heat preservation process of the vehicle-mounted charger on the power battery;
and the fifth instruction sending module is used for sending a fifth control instruction to the vehicle-mounted charger if the vehicle is determined to meet the preset heat preservation end condition, wherein the fifth control instruction is used for controlling the vehicle-mounted charger to stop preserving heat of the power battery.
Optionally, the apparatus 20 further comprises:
the second determination module is used for determining whether the charging and heat-preserving function is started or not if the environment temperature is monitored to be smaller than a first preset temperature threshold and the temperature of the power battery is monitored to be smaller than a second preset temperature threshold;
the first instruction sending module is used for sending a first control instruction to a vehicle-mounted charger under the condition that the charging heat preservation function is started.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The present disclosure also provides a vehicle comprising: the vehicle power battery temperature control system comprises a battery management unit, a vehicle-mounted charger, a thermal management control unit and a direct current/direct current converter, wherein the battery management unit is used for executing steps of the vehicle power battery temperature control method provided by any embodiment of the disclosure.
FIG. 3 is a block diagram of a vehicle shown in accordance with an exemplary embodiment. As shown in fig. 3, the vehicle 300 may include: a processor 301 and a memory 302. The vehicle 300 may also include one or more of a multimedia component 303, an input/output (I/O) interface 304, and a communication component 305.
The processor 301 is configured to control the overall operation of the vehicle 300 to complete all or part of the steps of the above-described management method for the battery system. The memory 302 is used to store various types of data to support operation at the vehicle 300, which may include, for example, instructions for any application or method operating on the vehicle 300, as well as application-related data, such as messages, pictures, audio, video, and the like, to be sent and received. The Memory 302 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia components 303 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 302 or transmitted through the communication component 305. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 304 provides an interface between the processor 301 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 305 is used for wired or wireless communication between the vehicle 300 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 305 may therefore include: Wi-Fi module, Bluetooth module, NFC module, etc.
In an exemplary embodiment, the vehicle 300 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described battery system management method.
In another exemplary embodiment, there is also provided a computer readable storage medium including program instructions, which when executed by a processor, implement the steps of the management method of the battery system described above. For example, the computer readable storage medium may be the memory 302 described above including program instructions executable by the processor 301 of the vehicle 300 to perform the battery system management method described above.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A vehicle power battery temperature control method, characterized in that the method comprises:
if the power battery meets the preset charging end condition, monitoring the ambient temperature and the temperature of the power battery;
if the monitored environment temperature is smaller than a first preset temperature threshold value and the temperature of the power battery is smaller than a second preset temperature threshold value, sending a first control instruction to a vehicle-mounted charger, wherein the first control instruction is used for controlling the vehicle-mounted charger to keep the temperature of the power battery, and the first preset temperature threshold value is smaller than the second preset temperature threshold value;
and in the process of heat preservation of the power battery by the vehicle-mounted charger, if the temperature of the power battery is monitored to be smaller than a third preset temperature threshold value, sending a second control instruction to a thermal management control unit, wherein the second control instruction is used for controlling the thermal management control unit to heat the power battery, and the third preset temperature threshold value is larger than the first preset temperature threshold value and smaller than the second preset temperature threshold value.
2. The method according to claim 1, wherein the first control instruction carries first operating parameter information corresponding to the vehicle-mounted charger, and the second control instruction carries second operating parameter information corresponding to the thermal management control unit.
3. The method of claim 1, wherein after said step of sending a second control instruction to the thermal management control unit, the method further comprises:
if the power battery temperature is monitored to be greater than or equal to a fourth preset temperature threshold, sending a third control instruction to the thermal management control unit, wherein the third control instruction is used for controlling the thermal management control unit to stop heating the power battery, and the fourth preset temperature threshold is greater than the third preset temperature threshold and smaller than the second preset temperature threshold.
4. The method of claim 1, wherein if the ambient temperature is monitored to be less than a first predetermined temperature threshold and the power cell temperature is monitored to be less than a second predetermined temperature threshold, the method further comprises:
sending a fourth control instruction to the vehicle-mounted charger, wherein the fourth control instruction is used for controlling the vehicle-mounted charger to stop charging the power battery; and the number of the first and second groups,
and under the condition that the vehicle-mounted charger is determined to stop charging the power battery, the step of sending a first control instruction to the vehicle-mounted charger is executed.
5. The method according to any one of claims 1-4, further comprising:
determining whether the vehicle meets a preset heat preservation end condition or not in the process of preserving heat of the power battery by the vehicle-mounted charger;
and if the fact that the vehicle meets the preset heat preservation end condition is determined, sending a fifth control instruction to the vehicle-mounted charger, wherein the fifth control instruction is used for controlling the vehicle-mounted charger to stop preserving heat of the power battery.
6. The method according to any one of claims 1-4, wherein if the ambient temperature is monitored to be less than a first preset temperature threshold and the power cell temperature is monitored to be less than a second preset temperature threshold, the method further comprises:
determining whether a charging heat preservation function is started;
and under the condition that the charging heat preservation function is started, the step of sending a first control instruction to the vehicle-mounted charger is executed again.
7. A vehicle power battery temperature control apparatus, characterized in that the apparatus comprises:
the monitoring module is used for monitoring the ambient temperature and the temperature of the power battery if the power battery meets a preset charging end condition;
the first instruction sending module is used for sending a first control instruction to a vehicle-mounted charger if the monitored environment temperature is smaller than a first preset temperature threshold and the temperature of the power battery is smaller than a second preset temperature threshold, wherein the first control instruction is used for controlling the vehicle-mounted charger to keep the temperature of the power battery, and the first preset temperature threshold is smaller than the second preset temperature threshold;
and the second instruction sending module is used for sending a second control instruction to the thermal management control unit if the temperature of the power battery is monitored to be smaller than a third preset temperature threshold in the heat preservation process of the power battery by the vehicle-mounted charger, wherein the second control instruction is used for controlling the thermal management control unit to heat the power battery, and the third preset temperature threshold is larger than the first preset temperature threshold and smaller than the second preset temperature threshold.
8. The device according to claim 7, wherein the first control instruction carries first operating parameter information corresponding to the vehicle-mounted charger, and the second control instruction carries second operating parameter information corresponding to the thermal management control unit.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
10. A vehicle, characterized by comprising: battery management unit, on-board charger, thermal management control unit, dc/dc converter, wherein the battery management unit is configured to perform the steps of the method according to any of claims 1-6.
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| CN201911150728.1A CN112824138A (en) | 2019-11-21 | 2019-11-21 | Vehicle power battery temperature control method and device, storage medium and vehicle |
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| CN201911150728.1A CN112824138A (en) | 2019-11-21 | 2019-11-21 | Vehicle power battery temperature control method and device, storage medium and vehicle |
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