CN114824580A - Power battery heating control method, system, vehicle and storage medium - Google Patents
Power battery heating control method, system, vehicle and storage medium Download PDFInfo
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- CN114824580A CN114824580A CN202210506564.7A CN202210506564A CN114824580A CN 114824580 A CN114824580 A CN 114824580A CN 202210506564 A CN202210506564 A CN 202210506564A CN 114824580 A CN114824580 A CN 114824580A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 399
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004321 preservation Methods 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000005485 electric heating Methods 0.000 claims description 28
- 238000012806 monitoring device Methods 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 description 10
- 101100518501 Mus musculus Spp1 gene Proteins 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
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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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a power battery heating control method, a power battery heating control system, a vehicle and a storage medium, wherein the power battery heating control method comprises the following steps: acquiring the current temperature of a part to be heated, wherein the part to be heated comprises a power battery and/or a passenger compartment; determining the heating starting time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and cooling rate of the part to be heated; and heating the part to be heated when the time reaches the heating start time. According to the embodiment of the invention, when the part to be heated is heated to the target heating temperature, the departure time is reached, or the time is close to the departure time, and the heat on the part to be heated cannot be lost, so that the waste of energy is reduced, and the energy utilization rate is high.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a power battery heating control method, a power battery heating control system, a vehicle and a storage medium.
Background
Due to the fact that the lithium ion battery is difficult to charge in a low-temperature environment, a user needs to start a vehicle by a key 40-60 min in advance to heat the power battery. For a passenger car, after the heating function of a passenger compartment is started, the comfortable temperature of a human body (more than 18 ℃) can be reached within about 30 min. Therefore, the intelligent self-heating system is arranged, the power battery for automatically starting the vehicle and the passenger compartment are automatically heated, and a user does not need to start the vehicle in advance through a key.
At present, the automatic starting and heating mode of the vehicle is to automatically start a passenger compartment and a power battery of the vehicle by setting departure time and advancing the departure time by more than 40 min. However, when the minimum temperature Tmin of the power battery is less than the first preset temperature TA, the power battery is used for heating the battery, and when the minimum temperature Tmin of the battery is greater than the second preset temperature or the maximum temperature Tmax of the battery is greater than the third preset temperature, the battery stops heating. After the heating is stopped, if the departure time is not yet reached, the temperature of the power battery stored in the environment will continue to decrease, and the temperature in the passenger compartment of the vehicle will also decrease. Therefore, at present, although the vehicle can automatically start heating in advance, the utilization rate of energy is low, and the resource waste is caused.
Disclosure of Invention
The invention mainly aims to provide a power battery heating control method, a power battery heating control system, a vehicle and a storage medium, and aims to solve the technical problems that a photovoltaic confluence area divided by the power battery heating control method is high in cable cost and difficult to construct.
In order to achieve the above object, the present invention provides a power battery heating control method, including the following steps:
acquiring the current temperature of a part to be heated, wherein the part to be heated comprises a power battery and/or a passenger compartment;
determining the heating starting time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and cooling rate of the part to be heated;
and heating the part to be heated when the time reaches the heating start time.
Optionally, after the step of acquiring the current temperature of the component to be heated, the method further includes:
calculating the time length to be heated according to the current temperature of the part to be heated and the heating temperature rise rate of the part to be heated;
heating the part to be heated when the time length to be heated is longer than or equal to the departure time from the current time to the departure time;
and when the heating duration is shorter than the starting duration, executing the step of determining the heating starting time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and cooling rate of the part to be heated.
Optionally, the step of determining the heating start time of the member to be heated according to the current temperature, the target heating temperature of the member to be heated, the heating temperature rise rate of the member to be heated, and the heat preservation and temperature reduction rate of the member to be heated includes:
determining the temperature of the part to be heated after the temperature of the part to be heated is reduced from the current time to a preset starting time according to the current temperature and the heat preservation and temperature reduction rate of the part to be heated;
calculating a target heating time length according to the reduced temperature, the target heating temperature and the heating temperature rise rate of the part to be heated;
determining the heating starting time according to the target heating time and the departure time between the preset heating starting time and the departure time; the preset starting time is the same as the heating starting time, and the difference value between the target heating time and the departure time is smaller than or equal to the preset difference value.
Optionally, when the to-be-heated member includes the power battery and the passenger compartment, the step of determining the heating on-time of the to-be-heated member according to the current temperature, the target heating temperature of the to-be-heated member, the heating temperature rise rate of the to-be-heated member, and the heat preservation and temperature reduction rate of the to-be-heated member includes:
determining the heating starting time of the corresponding part to be heated according to the current temperature, the target heating temperature, the heating temperature rise rate and the heat preservation and cooling rate of the part to be heated respectively;
and taking the heating starting time of the part to be heated with the earliest time as the heating starting time.
Optionally, the step of heating the member to be heated includes:
detecting the state of the power battery;
when the power battery is in a state of being connected with a charging pile, the charging pile is controlled to heat the part to be heated;
and when the power battery is not connected with the charging pile, the power battery is controlled to be heated.
Optionally, when the power battery is not connected to the charging pile, the step of controlling the power battery to heat includes:
when the power battery is not connected with the charging pile, acquiring a battery residual capacity value of the power battery;
when the residual capacity value of the battery is larger than a preset threshold value, controlling the power battery to be heated;
and when the residual capacity value of the battery is smaller than or equal to a preset threshold value, stopping controlling the power battery to heat.
Optionally, after the step of heating the component to be heated when the time reaches the heating on time, the method further includes:
acquiring the temperature of a part to be heated;
and when the temperature of the part to be heated is greater than or equal to the preset temperature, stopping heating the part to be heated.
The present invention also provides a power battery heating control system, including: a vehicle, the vehicle comprising:
the heating device comprises a to-be-heated part and a control part, wherein the to-be-heated part comprises a power battery and/or a passenger compartment electric heating part;
the thermal management controller is connected with a temperature monitoring device to acquire the temperature of the power battery;
the power battery management module is connected with the power battery and the thermal management controller and used for controlling the power battery to heat or controlling the charging pile to charge and heat.
Optionally, the power battery management module comprises:
the battery heating relay is connected between a high-voltage heating loop of the power battery and a battery high-voltage loop and used for controlling the connection and disconnection between the battery high-voltage loop and the high-voltage heating loop;
and/or the passenger compartment electric heating element is connected with the battery high-voltage loop, and the passenger compartment electric heating relay is connected between the passenger compartment electric heating element and the battery high-voltage loop and is used for controlling the connection and disconnection between the passenger compartment electric heating element and the battery high-voltage loop.
Optionally, the battery management module further includes a charging relay, the charging relay includes an input end and at least two output ends, the input end is used for being connected with a charging pile, one of the output ends is connected with the battery heating relay, and the other output end is connected with the passenger compartment electric heating element.
Optionally, the control system further comprises:
the application end, the application end with vehicle communication connection, the application end is used for reserving the departure time of vehicle and/or for showing or paying the charging information of electric pile, wherein, the application end includes reservation APP end and/or charging platform end.
The present invention also provides a vehicle comprising: a memory, a processor, and a power battery heating control program stored in the memory and executable on the processor, the power battery heating control program when executed by the processor implementing the steps of the power battery heating control method as described above.
The invention also provides a storage medium, wherein the storage medium stores a power battery heating control program, and the power battery heating control program realizes the steps of the power battery heating control method when being executed by a processor.
According to the power battery heating control method, the system, the vehicle and the storage medium, when the vehicle is used in a low-temperature environment, the vehicle can obtain the current temperature of a part to be heated by reserving departure time in advance, wherein the part to be heated comprises the power battery and/or a passenger compartment; then determining the heating starting time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and cooling rate of the part to be heated; and heating the part to be heated when the time reaches the heating start time. Therefore, the vehicle can calculate the appropriate heating start time according to the actual temperature of the part to be heated, and then starts the heating of the part to be heated after the heating start time, so that the part to be heated reaches the departure time when being heated to the target heating temperature, or the time to be heated is closer to the departure time, and the heat on the part to be heated cannot be lost, thereby reducing the energy waste and ensuring high energy utilization rate.
Drawings
Fig. 1 is a schematic diagram of a hardware architecture related to a power battery heating control method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a power battery heating control method according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a further detailed process of step S20 in FIG. 2;
fig. 4 is a schematic flow chart of a power battery heating control method according to a second embodiment of the present invention;
fig. 5 is a schematic flow chart of a power battery heating control method according to a third embodiment of the present invention;
fig. 6 is a schematic diagram of a power battery heating control system provided by an embodiment of the invention;
fig. 7 is a schematic diagram of a detailed embodiment of a method for controlling heating of a power battery according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Reference numerals: 100-a power cell; 200-a thermal management controller; 300-a power battery management module; 400-temperature monitoring means; 301-battery heating relay; 600-passenger compartment electrical heating; 302-passenger compartment electrical heating relay; 303-charging relay; 500-application side.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Under a low-temperature environment, the lithium ion battery is difficult to charge, if metal lithium is easily accumulated on the surface of a negative electrode of the lithium ion battery to form during charging, the growth of lithium dendrites can pierce a battery diaphragm to cause internal short circuit of the battery, permanent damage is caused to the battery, and even thermal runaway of the battery can be induced under extreme conditions; the internal resistance of a power battery is increased due to low temperature, the charging and discharging power characteristics are poor, the charging and discharging coulomb efficiency is reduced, the power performance of the whole vehicle is reduced, the charging time is prolonged, the driving range of the whole vehicle is reduced in winter, particularly in a hybrid vehicle type, if the temperature of the power battery cannot reach above 0 ℃, a hybrid system cannot be started to charge the battery, the battery can only be discharged in a pure electric mode, and a user needs to start the vehicle by a key in advance (if the vehicle is started in advance for 40-60 min), so that the power battery is heated. For a passenger car, after the heating function of the passenger compartment is started, the comfortable temperature of the human body (more than 18 ℃) can be reached within about 30 min. Therefore, the intelligent self-heating system is arranged, the power battery for automatically starting the vehicle and the passenger compartment are automatically heated, and a user does not need to start the vehicle in advance through a key.
At present, the automatic starting and heating mode of the vehicle is to automatically start a passenger compartment and a power battery of the vehicle by setting departure time and advancing the departure time by more than 40 min. However, when the minimum temperature Tmin of the power battery is less than the first preset temperature TA, the power battery is used for heating the battery, and when the minimum temperature Tmin of the battery is greater than the second preset temperature or the maximum temperature Tmax of the battery is greater than the third preset temperature, the battery stops heating. After heating is stopped and a certain time is delayed, the whole vehicle is in power-off dormancy, if the departure time is not reached, the temperature of the power battery is stored in the environment and can be reduced continuously, the temperature in a passenger cabin of the vehicle can be reduced, and only the electric quantity of the power battery can be consumed for heating, so that the driving range of the whole vehicle is influenced. Therefore, at present, although the vehicle can automatically start heating in advance, the utilization rate of energy is low, and resource waste is caused.
And when the temperature rise rate of external heating of the power battery is about 0.5 ℃/min, the power battery is heated from-20 ℃ to 10 ℃ for more than 40min, and the charging and discharging power of the power battery is limited in the process, so that the dynamic property and the energy recovery rate of the whole vehicle are influenced.
The internal resistance of the power battery is large under the low-temperature condition, the charging and discharging power is limited, in order to ensure the dynamic property and the driving range of the whole vehicle, because a user cannot monitor the temperature and the heating time of the battery in real time, the vehicle is usually started by a key or set for fixed time in advance 40min, the electric quantity of the power battery is consumed to heat the battery, if the heating required time is short, after the heating is stopped, the temperature of the power battery can be reduced again, the energy utilization rate is low, the energy of the power battery is consumed, the driving range of the whole vehicle is influenced, and the user experience is poor.
When the vehicle in the cold region is stored outdoors, the temperature in the passenger cabin generally drops to below-20 ℃, heating of the passenger cabin is started, the temperature rises to 18 ℃ from-20 ℃ for more than 20min, a user cannot monitor the temperature of the passenger cabin in real time, the vehicle heating function needs to be started through a key or APP in advance for a certain time, and if the set time is too long, the electric quantity consumed by heating is too large. The heating time may be different according to different heating modes, and is not limited to the heating time required to be 40min or 20min in advance.
Based on this, the present invention provides a method for reducing energy consumption of a power battery, improving energy utilization, and reducing energy waste, as follows.
As an implementation manner, the hardware environment architecture involved in the power battery heating control method may be as shown in fig. 1.
Specifically, the hardware architecture related to the power battery heating control method may include a vehicle, or may be a terminal, for example, the terminal is a mobile terminal.
As one implementation, the vehicle or terminal includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. Wherein a communication bus 103 is used for enabling the connection communication between these components. The processor 102 is used to invoke an application program to perform control operations.
The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory).
Alternatively, as an implementation method, a control program implementing the power battery heating control method may be stored in a storage medium storing a power battery heating control program, which when executed by a processor implements the steps of the power battery heating control method.
Based on the above framework, the invention provides various embodiments of a power battery heating control method.
First embodiment
Referring to fig. 2, the power battery heating control method includes the following steps:
step S10, acquiring the current temperature of a component to be heated, wherein the component to be heated comprises a power battery and/or a passenger compartment;
step S20, determining the heating start time of the component to be heated according to the current temperature, the target heating temperature of the component to be heated, the heating temperature rise rate of the component to be heated and the heat preservation and temperature reduction rate of the component to be heated;
and step S30, heating the component to be heated when the time reaches the heating starting time.
The present embodiment may be applied to a thermal management controller of a vehicle, and may also be applied to a terminal, such as a mobile terminal or the like, which is provided with a reservation system that can execute the power battery heating control process. The following description will be given by way of example of a thermal management controller applied to a vehicle.
In this embodiment, a temperature monitoring device is provided in the vehicle, and the temperature monitoring device is used for detecting the temperature of a power battery of the vehicle. Alternatively, in some embodiments, the temperature monitoring device may monitor the temperature of the power battery or the passenger compartment in real time or periodically. Or in other embodiments, when the vehicle receives a user appointment for departure, the temperature monitoring device is awakened to monitor the temperature of the power battery or the passenger compartment, or the temperature monitoring device is awakened to monitor the temperature of the power battery or the passenger compartment at regular time according to a departure habit of the user. Or when the vehicle receives the appointed departure time of the user, the awakening time of the temperature monitoring device is determined according to the appointed departure time, and when the awakening time is reached, the temperature monitoring device is awakened to monitor the temperature of the power battery or the passenger compartment, so that the energy consumption of the temperature monitoring device can be reduced. Optionally, the temperature monitoring device wakes up within 60 minutes before departure time, and heats the power battery or the passenger compartment within 60 minutes, so that the battery required temperature or the passenger compartment required temperature before departure can be met.
In this embodiment, after acquiring the current temperature of the component to be heated, the thermal management controller of the vehicle may determine the heating start time of the component to be heated according to the current temperature, the target heating temperature of the component to be heated, the heating temperature rise rate of the component to be heated, and the heat preservation and cooling rate of the component to be heated; and then heating the member to be heated when the time reaches the heating-on time.
It should be noted that the current temperature is monitored by the temperature monitoring device. The target heating temperature is a heating stop temperature of the power battery, and when the power battery is heated to a certain temperature, the heating is required to be stopped, so that the temperature of the power battery is prevented from being too high, or in some embodiments, the target heating temperature is a temperature at which the vehicle can be started in a low-temperature environment. The heating temperature rise rate is the temperature rise rate when the part to be heated is heated. The heat preservation and temperature reduction rate is the temperature loss rate of the part to be heated when the part is not heated in the environment. The heating starting time is the time for heating the part to be heated, namely the heating starting time is started for heating the part to be heated. Optionally, when the parts to be heated are different, the corresponding target heating temperature, heating temperature rise rate and heat preservation temperature reduction rate are different, and therefore, the correspondingly obtained heating start time is different.
Based on this, when it is required to heat the power battery and the passenger compartment simultaneously, that is, when the component to be heated includes the power battery and the passenger compartment, the step of determining the heating on time of the component to be heated according to the current temperature, the target heating temperature of the component to be heated, the heating temperature rise rate of the component to be heated, and the heat preservation and temperature reduction rate of the component to be heated includes:
determining the heating starting time of the corresponding part to be heated according to the current temperature, the target heating temperature, the heating temperature rise rate and the heat preservation and cooling rate of the part to be heated respectively;
and taking the heating starting time of the part to be heated with the earliest time as the heating starting time.
And respectively calculating heating starting time corresponding to the power battery and heating starting time corresponding to the passenger compartment, selecting the heating starting time with the earliest time from the two heating starting times as the final unique heating starting time, and simultaneously starting the thermal management controller to heat the power battery and the passenger compartment according to the heating starting times.
Optionally, in this embodiment, the heating start time is determined by a target heating time length, where a difference between the target heating time length and a departure time length from the heating start time to the departure time length is less than or equal to a preset difference, and the departure time is reserved and set by a user through an APP terminal, so that the heating start time can be determined according to the departure time length and the target heating time length. Optionally, the preset difference is a threshold value that the target heating time duration is close to or less than the departure time duration, that is, when the difference between the target heating time duration and the departure time duration is less than or equal to the preset difference, the difference between the target heating time duration and the departure time duration is not far, and at this time, the heating is started to avoid the problem that the energy utilization rate is low because the heating of the to-be-heated component does not reach the departure time after reaching the target temperature. Optionally, the preset difference is less than or equal to 1.
Optionally, the target heating duration may be directly determined according to the current temperature, the target heating temperature, the heating temperature rise rate, and the heat preservation cooling rate when the current temperature is detected, by setting a correlation between the current temperature, the target heating temperature, the heating temperature rise rate, and the heat preservation cooling rate in the thermal management controller, and the target heating duration.
Optionally, the correlation between the current temperature, the target heating temperature, the heating temperature rise rate, the heat preservation temperature reduction rate and the target heating duration is as follows:
t2＝(T2-T1+t1*η1)/(η1+η2)；
wherein t2 is the target heating period; t1 is the current temperature; t2 is the target heating temperature; t1 is the total duration from the current time to the departure time; eta 1 is the heat preservation and temperature reduction rate; and eta 2 is the heating temperature rise rate. Alternatively, in one embodiment, t1 is 60 minutes.
In this embodiment, the correlation of the target heating time duration is based on that the to-be-heated component has heat loss in the process from the current time to the heating start time, that is, the temperature is reduced, then the difference between the heating time duration from the reduced temperature to the target heating temperature and the departure time duration from the heating start time to the departure time is smaller than a preset difference, and the correlation is derived based on the principle.
Optionally, referring to fig. 3, the step of determining the heating on-time of the to-be-heated member according to the current temperature, the target heating temperature of the to-be-heated member, the heating temperature rise rate of the to-be-heated member, and the heat preservation and temperature reduction rate of the to-be-heated member includes:
step S21, determining the temperature of the part to be heated after the temperature of the part to be heated drops from the current time to a preset opening time according to the current temperature and the heat preservation and temperature reduction rate of the part to be heated;
step S22, calculating a target heating time length according to the temperature after the temperature drop, the target heating temperature and the heating temperature rise rate of the part to be heated;
step S23, determining the heating starting time according to the target heating time and the departure time between the preset heating starting time and the departure time; the preset starting time is the same as the heating starting time, and the difference value between the target heating time and the departure time is smaller than or equal to the preset difference value.
Optionally, assuming that the heating start time is t2 (that is, the preset start time is t2), after the current time when the current temperature is detected reaches the preset start time, the temperature value of the heating part to be heated is the product of the heat preservation and cooling rate and the time period between the current time and the preset start time, and the temperature of the heating part to be heated after being cooled is the difference between the current temperature and the temperature value of the heating part to be heated. And then determining the temperature to be increased based on the difference value between the target heating temperature and the reduced temperature, calculating the time length to be heated according to the ratio of the temperature to be increased to the heating temperature increase rate, and determining the heating starting time based on the relation between the time length to be heated and the departure time length.
Alternatively, T2 ═ heating temperature rise/heating temperature rise rate ═ { T2 [ [ T1- (T1-T2) η 1 }/η 2;
obtained by the equation operation, T2 ═ (T2-T1+ T1 ═ η 1)/(η 1+ η 2);
that is, the heating start time of the member to be heated may be determined based on the current temperature, the target heating temperature of the member to be heated, the heating temperature rise rate of the member to be heated, and the heat preservation and temperature reduction rate of the member to be heated. Wherein t2 is the target heating time period; t2 is the target heating temperature; t1 is the total duration from the current time to the departure time; eta 1 is the heat preservation and temperature reduction rate; eta 2 is the heating temperature rise rate; t1 is the current temperature. Optionally, in an embodiment, t1 is 60 minutes, that is, when the scheduled departure time information is received, the temperature monitoring device is awakened 60 minutes in advance, so that the temperature monitoring device monitors the temperature of the power battery or the temperature of the passenger compartment, and then the heating start time calculation and the heating control are performed.
In the embodiment, when the vehicle is used in a low-temperature environment, the vehicle acquires the current temperature of a part to be heated, which comprises a power battery and/or a passenger compartment, on the basis of the reserved departure time in advance; then determining the heating start time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and temperature reduction rate of the part to be heated; and heating the part to be heated when the time reaches the heating start time. Therefore, the vehicle can calculate the appropriate heating start time according to the actual temperature of the part to be heated, and then starts the heating of the part to be heated after the heating start time, so that the part to be heated reaches the departure time when being heated to the target heating temperature, or the time to be heated is closer to the departure time, and the heat on the part to be heated cannot be lost, thereby reducing the energy waste and ensuring high energy utilization rate.
Optionally, after the step of heating the component to be heated when the time reaches the heating on time, the method further includes: acquiring the temperature of a part to be heated; and when the temperature of the part to be heated is greater than or equal to the preset temperature, stopping heating the part to be heated.
That is to say, when the temperature after the part to be heated is greater than or equal to the preset temperature, the heating is stopped, and the situation that the temperature of the power battery is too high or the temperature in the passenger compartment is too high to cause discomfort of passengers is avoided.
It is understood that, in some embodiments, the correlation between the current temperature, the target heating temperature, the heating temperature rise rate, the heat preservation temperature reduction rate, and the heating start time may be directly set in the thermal management controller, and when the current temperature is detected, the heating start time is directly determined according to the current temperature, the target heating temperature, the heating temperature rise rate, and the heat preservation temperature reduction rate. Or, in some embodiments, it is further required to determine whether to heat immediately or to heat after determining the heating start time by combining the heating time period for heating to the target heating temperature at the current temperature and the departure time period. As in the second embodiment below.
Second embodiment
The present embodiment is based on the first embodiment described above. Optionally, referring to fig. 4, after the step of obtaining the current temperature of the component to be heated, the method further includes:
step S40, calculating the time length to be heated according to the current temperature of the part to be heated and the heating temperature rise rate of the part to be heated;
step S50, heating the part to be heated when the time length to be heated is longer than or equal to the departure time between the current time and the departure time;
and step S20, when the heating duration is shorter than the starting duration, determining the heating start time of the component to be heated according to the current temperature, the target heating temperature of the component to be heated, the heating temperature rise rate of the component to be heated and the heat preservation and cooling rate of the component to be heated.
In this embodiment, after waking up the temperature monitoring device, the thermal management controller obtains the current temperature of the component to be heated, then determines the target temperature-raising temperature according to the current temperature and the target heating temperature, and determines the time length to be heated of the component to be heated based on the ratio of the target temperature-raising temperature and the heating rate. And then comparing the time length to be heated with the departure time length of the departure time reserved by the current time. If the time length to be heated is more than or equal to the departure time length, the time length to be heated is judged, the heating part to be heated is not heated to the target heating temperature, the departure time is reached, the heating part to be heated is directly heated at the moment, the condition that the heating is stopped and the departure is not carried out can not occur, the condition of heat loss can not occur, and therefore the heating part to be heated can be directly heated and controlled. If the time length to be heated is less than the time length of departure, that is, the time length of the current time from the time length of departure is longer, if the heating control is performed on the part to be heated at present, the time length of departure is not yet reached after the heating is stopped, and the situation that the heat of the part to be heated is lost exists at the moment.
In the embodiment, the sizes of the time length to be heated and the departure time length which are required by heating to the target heating temperature and correspond to the target heating temperature are determined through the current temperature and the heating temperature rise rate, so that the heating starting time determining mode is selected, the calculation of the heating starting time can be reduced, and the running speed is increased.
Third embodiment
The present embodiment is based on all the embodiments described above.
In the embodiment, based on the exemplary technology, in the process of heating the to-be-heated part, the power battery is used for heating, the electric quantity of the power battery is consumed for heating the battery, and the energy of the power battery is consumed, so that the cruising driving mileage of the whole vehicle is influenced. Based on this, the embodiment provides a power battery management module in the vehicle, and the power battery management module can selectively control the heating mode of the heating part.
Referring to fig. 5, the step of heating the member to be heated includes:
step S31, detecting the state of the power battery;
step S32, when the power battery is in a state of being connected with a charging pile, the charging pile is controlled to heat the part to be heated;
and step S33, when the power battery is not connected with the charging pile, controlling the power battery to heat.
After the heating starting time is determined, or the time reaches the heating starting time, a power battery management module of the vehicle monitors the state of the power battery, and if the power battery is connected with a charging pile, the charging pile is adopted to heat the part to be heated in the process of controlling the part to be heated to heat. If power battery does not connect with charging pile, then adopt power battery to treat the heating element and heat. So, under the condition of being connected with charging pile, the preferential adoption charges electric pile to the heating part heating to treating the heating part and heating, need not to consume power battery's energy, can reduce the influence to continuation of the journey.
Optionally, in some embodiments, the step of controlling the power battery to heat when the power battery is not connected to the charging pile includes: when the power battery is not connected with the charging pile, acquiring a battery residual capacity value of the power battery; when the residual capacity value of the battery is larger than a preset threshold value, controlling the power battery to be heated; and when the residual capacity value of the battery is smaller than or equal to a preset threshold value, stopping controlling the power battery to heat.
That is, when the power battery is used for heating, the residual battery capacity of the power battery needs to be detected, and when the SOC (battery residual capacity) of the power battery or the lowest monomer voltage is lower than a preset threshold value, the power battery stops consuming energy for heating, so that the power battery is prevented from being over-discharged, and the power battery is prevented from being damaged.
Referring to fig. 6, an embodiment of the present invention further provides a power battery heating control system, where the battery heating control system includes: a vehicle, the vehicle comprising:
a part to be heated, which comprises the power battery 100 and/or the passenger compartment electric heating element 600;
the thermal management controller 200 is connected with the temperature monitoring device 400, so as to acquire the temperature of the power battery 100;
the power battery management module 300, the power battery management module 300 with the power battery 100 with the thermal management controller 300 is connected, the power battery management module 300 is used for controlling the heating of the power battery 100 or controlling the charging and heating of the charging pile.
The power battery 100 is also communicated with the passenger compartment electric heating element 600, and when the power battery 100 is heated, power can be supplied to the passenger compartment electric heating element 600 to start the passenger compartment electric heating element 600 to heat the passenger compartment.
The power battery heating control system sends the current temperature of the power battery 100 and/or the passenger compartment to the thermal management controller 200 after monitoring the current temperature of the power battery 100 and/or the passenger compartment based on the temperature monitoring device 400, and the thermal management controller 200 calculates the heating start time of the power battery and/or the passenger compartment according to the current temperature and preset target heating temperature, heating temperature rise rate and heat preservation temperature reduction rate.
After the thermal management controller 200 calculates the heating start time, based on the heating start time, a control instruction is sent to the power battery management module 300, and the power battery management module 300 controls the power battery 100 to heat or the charging pile to heat based on the control instruction. The thermal management controller 200 determines the connection state of the power battery 100 and the charging pile based on the on-off state of a charging relay 303 in the power battery management module 300, and controls the power battery management module 300 to trigger the charging pile to heat the power battery 100 and/or the passenger compartment if the power battery 100 and the charging pile are in the connection state (the charging relay 303 is connected). If the passenger compartment is not connected, the power battery management module 300 is controlled to trigger the power battery 100 to heat the power battery 100 and/or the passenger compartment.
Optionally, the power battery management module 300 includes:
the battery heating relay 301 is connected between a high-voltage heating loop and a battery high-voltage loop of the power battery 100, and is used for controlling the connection and disconnection between the battery high-voltage loop and the high-voltage heating loop;
and/or a passenger compartment electric heating relay 302, wherein the passenger compartment electric heating element 600 is connected to the battery high-voltage loop, and the passenger compartment electric heating relay 302 is connected between the passenger compartment electric heating element 600 and the battery high-voltage loop and is used for controlling the connection and disconnection between the passenger compartment electric heating element 600 and the battery high-voltage loop;
the charging relay 303 comprises an input end and at least two output ends, the input end is used for being connected with a charging pile, one of the output ends is connected with the battery heating relay 301, and the other output end is connected with the passenger compartment electric heating element 600.
When the battery heating relay 301 is connected to the battery high-voltage circuit and the high-voltage heating circuit, the power battery 100 discharges and heats itself, and when the passenger compartment electric heating relay 302 is connected, the high-voltage circuit of the power battery 100 charges the passenger compartment electric heating element 600, so that the passenger compartment electric heating element 600 heats the passenger compartment. And when the charging relay 303 is switched on, the charging pile is communicated with the power battery 100 to charge the power battery 100, so that the power battery 100 is heated, and meanwhile, the charging pile also charges the passenger compartment electric heating element 600, so that the passenger compartment electric heating element 600 heats the passenger compartment. On the contrary, when the battery heating relay 301, the passenger compartment electric heating relay 302 and the charging relay 303 are turned off, the power battery 100 and the passenger compartment electric heating member 600 stop heating, and the power battery 100 and the passenger compartment stop heating.
Optionally, in an optional embodiment, the control system further includes:
the application terminal 500 is in communication connection with the vehicle, the application terminal 500 is used for reserving departure time of the vehicle and/or displaying or paying charging information of the charging pile, and the application terminal 500 comprises a reservation APP terminal and/or a charging platform terminal.
That is also the user can make an appointment through the APP terminal to the time of dispatching a car, when the vehicle received the time of dispatching a car of appointment, awaken in advance based on the time of dispatching a car the temperature monitoring device 400 is right power battery 100 or the current temperature in passenger cabin detects, then according to the current temperature that detects and the target heating temperature of predetermineeing the setting, heating temperature rise rate and heat preservation cooling rate calculate the heating start time in power battery and/or passenger cabin after, with current temperature and/or heating start time send to the APP terminal, supply the APP terminal shows, show to the user current temperature with heating start time.
Optionally, based on the control system, charging information obtained when the power battery 100 and/or the passenger compartment are heated by the charging pile can be sent to the charging platform end, so that a user can pay charging fees based on the charging platform end, and automatic charging is further achieved.
Optionally, in this embodiment, the temperature monitoring device 400 includes a temperature sensor and/or a monitoring device (for monitoring the temperature displayed by the power battery) and a 24h dc power supply DCDC, and after the low-voltage power failure of the entire vehicle, the timing automatic wake-up can still be set based on the 24h dc power supply DCDC, so as to upload the power battery temperature, the passenger compartment temperature, the heating start time, and the real-time data of the entire vehicle fault to the APP client or the monitoring platform.
Based on all the embodiments, the present embodiment provides a specific implementation method of the power battery heating method, please refer to fig. 7.
The monitoring platform APP of the application end sets the vehicle using time, and the function of heating the battery or the passenger compartment in advance is selected. After the vehicle receives the reservation information, the monitoring system is awakened regularly through 24h, the temperatures of the power battery and the passenger cabin are monitored in real time, the heating residual time of the power battery or the passenger cabin is estimated, the heating residual time is uploaded to the remote monitoring platform, and a user can check the temperatures, the charging connection state, the residual heating time and the fault information of the power battery and the passenger cabin through the remote monitoring platform APP in real time.
When the distance departure time ta is less than or equal to T2 (the residual heating time of the power battery or the residual heating time of the passenger compartment), the remote monitoring system wakes up the whole vehicle controller, the thermal management controller and the battery management system, and the thermal management controller calculates whether the residual heating time of the battery meets the following requirements according to the current temperature T1 of the power battery or the temperature T2 of the passenger compartment: t2 is not more than ta; if the requirement is met, the battery heating is selected to be started, the battery heating relay is closed by the thermal management controller, and the battery heating is started; if the heating of the passenger compartment is selected to be started, the heating of the passenger compartment is started); if the heating remaining time of the power battery and the passenger compartment is not met, the thermal management controller calculates the distance T21 from the heating start time (target heating time) of the power battery (T21-T11+ T1 × η 1)/(η 1+ η 2) according to the current temperature T11 of the power battery, the target heating temperature T21, the temperature heat preservation temperature reduction rate η 1 of the power battery and the heating temperature increase rate η 2; the thermal management controller calculates the passenger compartment distance heating opening time T22 ═ T22-T12+ T3 ×. eta.4)/(eta.31 + eta.4) according to the passenger compartment temperature T12, the heating stop temperature threshold T22, the passenger compartment temperature heat preservation temperature decrease rate eta 3 and the heating temperature increase rate eta 4; and automatically setting the final distance on-heating time t2 to Max (t21, t22) according to the maximum value of the calculated heating on-times t21 and t 22.
Optionally, in a further embodiment, when the heating starting time is reached, the battery management system determines whether the whole vehicle is connected with the charging pile, interacts with the charging pile APP through the remote monitoring platform, preferentially enters a charging heating mode, uses the charging pile to supply power to the heating system, and disconnects the charging and heating relay to stop heating the battery when the lowest temperature Tmin of the battery is greater than T2 or Tmax is greater than TC; when the temperature T of the passenger compartment is greater than TD, the electric heating relay of the passenger compartment is switched off, and heating is stopped; after all heating functions are stopped, if no key power-on or charging signal is detected, the whole vehicle automatically powers off and sleeps.
The battery management system judges that the whole vehicle enters a driving heating mode if the charging pile is not connected, the heating relay is closed, power battery energy is used for supplying power to the heating system, and when the lowest temperature Tmin of the battery is greater than T2 or Tmax is greater than TC, the heating relay is disconnected, and the battery heating is stopped; when the temperature T of the passenger compartment is greater than TD, the heating relay of the passenger compartment is switched off, and heating is stopped; after all heating functions stop, the whole vehicle is automatically powered off.
If in the charging and heating process, a key electrifying signal is detected, the whole vehicle keeps a charging and heating mode, and after the charging and heating stopping function is detected, the charging and heating module is quitted, and a driving mode is started.
If in the process of heating the vehicle, a key power-on or gun-plugging charging signal is detected, the vehicle exits the remote reservation heating mode, and enters a charging mode or a vehicle power-on mode according to the following priority (the charging mode is greater than the vehicle mode).
And when the SOC and the lowest single voltage of the power battery are lower than the SOC1, stopping consuming the energy of the power battery for heating, and preventing the power battery from over-discharging.
Optionally, an embodiment of the present invention further provides a vehicle, where the vehicle includes: a memory, a processor, and a power battery heating control program stored in the memory and executable on the processor, the power battery heating control program when executed by the processor implementing the various embodiments of the power battery heating control method as described above.
Optionally, an embodiment of the present invention further provides a storage medium, where the storage medium stores a power battery heating control program, and the power battery heating control program, when executed by a processor, implements the various embodiments of the power battery heating control method described above.
It should be noted that the above mentioned embodiments are only examples of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by using the contents of the present specification and drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A power battery heating control method is characterized by comprising the following steps:
acquiring the current temperature of a part to be heated, wherein the part to be heated comprises a power battery and/or a passenger compartment;
determining the heating starting time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and cooling rate of the part to be heated;
and heating the part to be heated when the time reaches the heating start time.
2. The power battery heating control method according to claim 1, wherein the step of acquiring the current temperature of the member to be heated is followed by further comprising:
calculating the time length to be heated according to the current temperature of the part to be heated and the heating temperature rise rate of the part to be heated;
heating the part to be heated when the time length to be heated is longer than or equal to the departure time from the current time to the departure time;
and when the heating duration is shorter than the starting duration, executing the step of determining the heating starting time of the part to be heated according to the current temperature, the target heating temperature of the part to be heated, the heating temperature rise rate of the part to be heated and the heat preservation and cooling rate of the part to be heated.
3. The power battery heating control method according to claim 1, wherein the step of determining the heating-on time of the member to be heated based on the current temperature, the target heating temperature of the member to be heated, the heating temperature-rise rate of the member to be heated, and the temperature-keeping temperature-reduction rate of the member to be heated includes:
determining the temperature of the part to be heated after the temperature of the part to be heated is reduced from the current time to a preset starting time according to the current temperature and the heat preservation and temperature reduction rate of the part to be heated;
calculating a target heating time length according to the reduced temperature, the target heating temperature and the heating temperature rise rate of the part to be heated;
determining the heating starting time according to the target heating time and the departure time between the preset heating starting time and the departure time; the preset starting time is the same as the heating starting time, and the difference value between the target heating time and the departure time is smaller than or equal to the preset difference value.
4. The power battery heating control method according to claim 1, wherein when the member to be heated includes the power battery and the passenger compartment, the step of determining the heating on time of the member to be heated based on the current temperature, the target heating temperature of the member to be heated, the heating temperature rise rate of the member to be heated, and the temperature keeping and temperature reduction rate of the member to be heated includes:
determining the heating starting time of the corresponding part to be heated according to the current temperature, the target heating temperature, the heating temperature rise rate and the heat preservation and cooling rate of the part to be heated respectively;
and taking the heating starting time of the part to be heated with the earliest time as the heating starting time.
5. The power battery heating control method according to any one of claims 1 to 4, wherein the step of heating the member to be heated includes:
detecting the state of the power battery;
when the power battery is in a state of being connected with a charging pile, the charging pile is controlled to heat the part to be heated;
and when the power battery is not connected with the charging pile, the power battery is controlled to be heated.
6. The power battery heating control method according to claim 5, wherein the step of controlling the power battery to be heated in a state where the power battery is not connected to the charging pile comprises:
when the power battery is not connected with the charging pile, acquiring a battery residual capacity value of the power battery;
when the residual capacity value of the battery is larger than a preset threshold value, controlling the power battery to be heated;
and when the residual capacity value of the battery is smaller than or equal to a preset threshold value, stopping controlling the power battery to heat.
7. The power battery heating control method according to claim 1, wherein after the step of heating the member to be heated when the time reaches the heating on time, the method further comprises:
acquiring the temperature of a part to be heated;
and when the temperature of the part to be heated is greater than or equal to the preset temperature, stopping heating the part to be heated.
8. A power battery heating control system, the battery heating control system comprising: a vehicle, the vehicle comprising:
the heating device comprises a to-be-heated part and a control part, wherein the to-be-heated part comprises a power battery and/or a passenger compartment electric heating part;
the thermal management controller is connected with a temperature monitoring device to acquire the temperature of the power battery;
and the power battery management module is connected with the power battery and the thermal management controller and used for controlling the heating of the power battery or controlling the charging and heating of the charging pile.
9. The power battery heating control system of claim 8, wherein the power battery management module comprises:
the battery heating relay is connected between a high-voltage heating loop of the power battery and a battery high-voltage loop and used for controlling the connection and disconnection between the battery high-voltage loop and the high-voltage heating loop;
and/or the passenger compartment electric heating relay is connected between the passenger compartment electric heating element and the battery high-voltage loop and used for controlling the connection and disconnection between the passenger compartment electric heating element and the battery high-voltage loop.
10. The power battery heating control system of claim 9, wherein the battery management module further comprises a charging relay including an input for connection to a charging post and at least two outputs, one of the outputs being connected to the battery heating relay and the other output being connected to the passenger compartment electrical heating.
11. The power battery heating control system of claim 8, wherein the control system further comprises:
the application end, the application end with vehicle communication connection, the application end is used for reserving the departure time of vehicle and/or for showing or paying the charging information of electric pile, wherein, the application end includes reservation APP end and/or charging platform end.
12. A vehicle, characterized in that the vehicle comprises: memory, a processor and a power battery heating control program stored in the memory and executable on the processor, the power battery heating control program when executed by the processor implementing the steps of the power battery heating control method according to any one of claims 1 to 7.
13. A storage medium characterized in that the storage medium stores a power battery heating control program that, when executed by a processor, implements the steps of the power battery heating control method according to any one of claims 1 to 7.
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