CN114614162A - Battery pack heating control method and device and vehicle - Google Patents
Battery pack heating control method and device and vehicle Download PDFInfo
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- CN114614162A CN114614162A CN202110336972.8A CN202110336972A CN114614162A CN 114614162 A CN114614162 A CN 114614162A CN 202110336972 A CN202110336972 A CN 202110336972A CN 114614162 A CN114614162 A CN 114614162A
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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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- 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
- H01M10/62—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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention provides a battery pack heating control method, a battery pack heating control device and a vehicle, wherein the method comprises the following steps: under the condition that the temperature of the battery pack is lower than the preset temperature of the battery pack, determining a temperature rise target heating rate corresponding to the temperature of the battery pack; acquiring real-time discharge power of the battery pack; determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power; determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate; controlling heating of the battery pack based on the target heating power. The problem of overlarge power loss caused by heating with single maximum power is avoided, the energy loss in the heating process of the battery pack is reduced, and the heat loss in the heating process of the battery pack can be reduced; the error between the actual heating power and the target heating power can be reduced, the energy-saving effect can be achieved, and further, the stability and the reliability of the vehicle battery pack are improved.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a battery pack heating control method and device and a vehicle.
Background
With the gradual development of the technical field of vehicle control, the new energy automobile is also rapidly developed as a branch of the vehicle, and the problem of energy consumption attenuation of a battery pack of the new energy automobile in winter is also focused.
At present, a part of power consumption of energy consumption attenuation is caused by heating of a battery pack, a heating technology for the battery pack of a new energy automobile mainly uses waste heat or carries out heating through a heater, and when the temperature of the battery pack is lower than the preset temperature of the battery pack, a heating strategy is started, and the heater is controlled to usually use the maximum power to carry out heating.
However, the heater usually uses the maximum power to heat, resulting in serious heat loss, and further, causing serious energy consumption attenuation of the battery pack, reducing the stability of the vehicle, and reducing the driving experience of the user.
Disclosure of Invention
In view of this, the present invention aims to provide a method and an apparatus for controlling heating of a battery pack, and a vehicle, so as to solve the problems that a heater usually uses the maximum power to heat, so that heat loss is serious, further, energy consumption of the battery pack is seriously attenuated, and stability of the vehicle is reduced.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a battery pack heating control method applied to an electronic controller of a vehicle, the method including:
under the condition that the temperature of the battery pack is lower than the preset temperature of the battery pack, determining a temperature rise target heating rate corresponding to the temperature of the battery pack;
acquiring real-time discharge power of the battery pack;
determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power;
determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate;
controlling heating of the battery pack based on the target heating power.
Optionally, the determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power includes:
determining a battery heat dissipation based on the real-time discharge power;
determining an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation amount.
Optionally, the determining a target heating power based on the instantaneous temperature-rising heating rate and the temperature-rising target heating rate includes:
determining a temperature rise rate difference between the instantaneous temperature rise heating rate and the temperature rise target heating rate based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
determining the target heating power based on the temperature rise rate difference.
Optionally, determining a temperature increase target heating rate corresponding to the temperature of the battery pack when the temperature of the battery pack is less than a preset temperature of the battery pack includes:
and under the condition that the temperature of the battery pack is lower than the preset temperature of the battery pack, determining a temperature rise target heating rate corresponding to the temperature of the battery pack by inquiring a prestored relation table between the temperature of the battery pack and the temperature rise target heating rate.
Optionally, the determining the heat dissipation capacity of the battery based on the real-time discharge power includes:
acquiring a battery core temperature value and the percentage of the residual electric quantity of the battery pack;
and determining the heat dissipation capacity of the battery by inquiring a pre-stored relation table of the discharge power, the cell temperature, the percentage of the residual electric quantity of the battery pack and the heat dissipation capacity of the battery based on the real-time discharge power, the cell temperature value and the percentage of the residual electric quantity of the battery pack.
Optionally, the determining an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation capacity comprises:
obtaining the heat dissipation capacity of at least two batteries within preset calculation time;
averaging the heat dissipating capacity of at least two batteries to obtain the average heat dissipating capacity of the batteries;
determining the instantaneous temperature rise heating rate based on the average heat dissipation amount.
In a second aspect, an embodiment of the present invention provides a battery pack heating control apparatus applied to an electronic controller of a vehicle, the apparatus including:
the first determining module is used for determining a temperature rise target heating rate corresponding to the temperature of the battery pack under the condition that the temperature of the battery pack is smaller than the preset temperature of the battery pack;
the acquisition module is used for acquiring the real-time discharge power of the battery pack;
a second determination module to determine an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power;
a third determination module for determining a target heating power based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
and the control module is used for controlling the heating of the battery pack based on the target heating power.
Optionally, the second determining module includes:
a first determining submodule for determining a battery heat dissipation based on the real-time discharge power;
a second determination submodule for determining an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation capacity.
Optionally, the third determining power comprises:
a third determination submodule for determining a temperature rise rate difference between the instantaneous temperature rise heating rate and the temperature rise target heating rate, based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
a fourth determination submodule for determining the target heating power based on the temperature rise rate difference.
Optionally, the first determining module includes:
and the fifth determining submodule is used for determining the temperature rise target heating rate corresponding to the temperature of the battery pack by inquiring a prestored relation table between the temperature of the battery pack and the temperature rise target heating rate under the condition that the temperature of the battery pack is smaller than the preset temperature of the battery pack.
Optionally, the first determining sub-module includes:
the first acquisition unit is used for acquiring the battery core temperature value and the percentage of the residual electric quantity of the battery pack;
and the first determination unit is used for determining the heat dissipation capacity of the battery by inquiring a pre-stored relation table of the discharge power, the cell temperature, the percentage of the residual electric quantity of the battery pack and the heat dissipation capacity of the battery based on the real-time discharge power, the cell temperature value and the percentage of the residual electric quantity of the battery pack.
Optionally, the second determining sub-module includes:
the second acquisition unit is used for acquiring the heat dissipation capacity of at least two batteries within preset calculation time;
the obtaining unit is used for averaging the heat dissipating capacity of at least two batteries to obtain the average heat dissipating capacity of the batteries;
a second determination unit for determining the instantaneous temperature-rising heating rate based on the average heat dissipation amount.
In a third aspect, an embodiment of the present invention provides a vehicle including the battery pack heating control apparatus according to any one of the second aspects.
Compared with the prior art, the embodiment of the invention has the following advantages:
according to the battery pack heating control method provided by the embodiment of the invention, under the condition that the temperature of a battery pack is lower than the preset temperature of the battery pack, the temperature rise target heating rate corresponding to the temperature of the battery pack is determined; acquiring real-time discharge power of the battery pack; determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power; determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate; controlling heating of the battery pack based on the target heating power. In the application, the target heating power can be determined according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, and the battery pack is heated based on the target heating power, so that the corresponding target heating power can be determined according to the current instantaneous temperature rise heating power, the problem of overlarge power consumption loss caused by heating by using single maximum power is avoided, the energy consumption loss in the heating process of the battery pack is reduced, and the heat loss in the heating process of the battery pack can be reduced; and determining target heating power according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, wherein the target heating power takes the instantaneous temperature rise heating rate and the temperature rise target heating rate into consideration, so that the error between the actual heating power and the target heating power can be reduced, the energy-saving effect can be achieved, and the stability and the reliability of the vehicle battery pack are further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating steps of a method for controlling heating of a battery pack according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a battery pack heating control method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating a battery pack heating control device according to a third embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a flow chart illustrating steps of a battery pack heating control method according to an embodiment of the present invention, which may be applied to an electronic controller of a vehicle, is shown.
As shown in fig. 1, the method for controlling heating of a battery pack may specifically include the following steps:
step 101: and under the condition that the temperature of the battery pack is less than the preset temperature of the battery pack, determining a temperature rise target heating rate corresponding to the temperature of the battery pack.
At present, the phenomenon of energy shortage is increasingly obvious, so the research of new energy automobiles becomes a trend, an important branch in the research of the new energy automobiles is a battery pack, for the new energy automobiles, the problem of energy consumption attenuation of the battery pack in winter is a very prominent problem, the driving range attenuation in winter is even as high as 50%, and a part of energy consumption is consumed by the heating process of the battery pack. Because the optimum temperature of the battery pack is usually between 25 ℃ and 35 ℃, and in the temperature interval, because the temperature in winter is lower, the battery pack needs to be heated by external heat, but the battery pack generates heat while heating, therefore, the application provides that under the condition that the battery pack requires a certain heating rate, the part of heat generated by the battery pack can be considered, and then the heater is heated by proper power, wherein the higher the power provided by the heater is, the greater the energy consumption and the energy waste of a pipeline are, the application provides a battery pack heating control method, and through the battery pack heating control method, the heating energy efficiency utilization rate of a testword can be improved.
In the case where the battery pack temperature is greater than or equal to the preset battery pack temperature, the heating strategy need not be executed.
And under the condition that the temperature of the battery pack is lower than the preset temperature of the battery pack, determining the temperature rise target heating rate corresponding to the temperature of the battery pack by inquiring a prestored relation table between the temperature of the battery pack and the temperature rise target heating rate.
The temperature rise target heating rate (V2) is defined according to vehicle positioning and dynamic requirements, and the pre-stored relation table of the battery pack temperature and the temperature rise target heating rate can correspond to each other one by one according to the percentage of the remaining capacity of the battery pack, the cell temperature value and the actual power.
And under the condition that the temperature of the battery pack is smaller than the preset temperature of the battery pack, after determining the temperature rise target heating rate corresponding to the temperature of the battery pack, executing step 102.
Step 102: and acquiring the real-time discharge power of the battery pack.
An Electronic Control Unit (ECU) may detect the real-time discharge power of the battery pack.
After acquiring the real-time discharge power of the battery pack, step 103 is executed.
Step 103: determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power.
After the ECU detects the battery pack real-time discharge power, a battery heat dissipation amount may be determined based on the real-time discharge power, and an instantaneous temperature rise heating rate of the battery pack may be determined based on the battery heat dissipation amount.
After determining the instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power, step 104 is performed.
Step 104: determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate.
In this application, the specific implementation process of the step 104 may include:
substep B1: determining a temperature increase rate difference between the instantaneous temperature increase heating rate and the temperature increase target heating rate based on the instantaneous temperature increase heating rate and the temperature increase target heating rate.
The temperature rise rate difference (Δ V) is the heating rate required to be provided by the external heater.
Temperature rise rate difference (Δ V) — instantaneous temperature rise heating rate (V2) — instantaneous temperature rise heating rate (V1).
Sub-step B2: determining the target heating power based on the temperature rise rate difference.
The target heating power (Q1) ═ CM Δ V, where C is the heat capacity of the battery pack and M is the mass of the battery pack.
After determining the target heating power based on the instantaneous temperature-rising heating rate and the temperature-rising target heating rate, step 105 is performed.
Step 105: controlling heating of the battery pack based on the target heating power.
In the present application, the ECU may control the heater to heat the battery pack based on the target heating power.
According to the battery pack heating control method provided by the embodiment of the invention, under the condition that the temperature of a battery pack is lower than the preset temperature of the battery pack, the temperature rise target heating rate corresponding to the temperature of the battery pack is determined; acquiring real-time discharge power of a battery pack; determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power; determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate; controlling heating of the battery pack based on the target heating power. In the application, the target heating power can be determined according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, and the battery pack is heated based on the target heating power, so that the corresponding target heating power can be determined according to the current instantaneous temperature rise heating power, the problem of overlarge power consumption loss caused by heating with single maximum power is avoided, the energy consumption loss in the heating process of the battery pack is reduced, and the heat loss in the heating process of the battery pack can be reduced; and determining target heating power according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, wherein the target heating power takes the instantaneous temperature rise heating rate and the temperature rise target heating rate into consideration, so that the error between the actual heating power and the target heating power can be reduced, the energy-saving effect can be achieved, and the stability and the reliability of the vehicle battery pack are further improved.
Referring to fig. 2, a flow chart illustrating steps of a battery pack heating control method according to a second embodiment of the present invention is shown, wherein the battery pack heating control method can be applied to an electronic controller of a vehicle.
As shown in fig. 2, the method for controlling heating of a battery pack may specifically include the following steps:
step 201: and under the condition that the temperature of the battery pack is less than the preset temperature of the battery pack, determining a temperature rise target heating rate corresponding to the temperature of the battery pack.
Optionally, the preset temperature of the battery pack may be 0 ℃ or 1 ℃, which is not specifically limited in this embodiment of the application, and the adjustment mark may be made according to an actual application scenario.
In the case where the battery pack temperature is greater than or equal to the preset battery pack temperature, the heating strategy need not be executed.
And under the condition that the temperature of the battery pack is lower than the preset temperature of the battery pack, determining the temperature rise target heating rate corresponding to the temperature of the battery pack by inquiring a prestored relation table between the temperature of the battery pack and the temperature rise target heating rate.
The temperature rise target heating rate (V2) is defined according to vehicle positioning and dynamic requirements, and the pre-stored relation table of the battery pack temperature and the temperature rise target heating rate can correspond to each other one by one according to the percentage of the remaining capacity of the battery pack, the cell temperature value and the actual power.
For example, table one shows a corresponding relationship table Of different cell temperature values, actual powers, and temperature increase target heating rates when the battery pack remaining capacity percentage (SOC) is 100%:
TABLE 1
As shown in Table I, the actual power is 8 kilowatts (kW) when the temperature value of the battery cell is-20 degrees Celsius (C), and the actual power is 15kW when the temperature value of the battery cell is-10 degrees Celsius. According to the definition of the vehicle, under the condition that the temperature value of the battery core is-20 ℃ (DEG C), the temperature of the battery pack rises to 1℃/min of the heating plastic bar, and under the condition that the heating value is-10 ℃, the heating is carried out to 0 ℃ at the speed of 0.5 ℃/min, and then the heating is stopped.
It should be noted that, in the continuous use process of the battery pack, the SOC of the battery is constantly changed, and a pre-stored relation table of the temperature of the battery pack and the temperature-increasing target heating rate corresponding to different SOCs may be obtained, or the interpolation may be performed according to two adjacent pre-stored SOCs to obtain the corresponding temperature-increasing target heating rate.
When the temperature of the battery pack is lower than the preset temperature of the battery pack, after determining the temperature rise target heating rate corresponding to the temperature of the battery pack, step 202 is executed.
Step 202: and acquiring the real-time discharge power of the battery pack.
An Electronic Control Unit (ECU) may detect the real-time discharge power of the battery pack.
After acquiring the real-time discharging power of the battery pack, step 203 is executed.
Step 203: determining a battery heat dissipation based on the real-time discharge power.
Specifically, the ECU may obtain the electric core temperature value and the percentage of remaining power of the battery pack, and determine the heat dissipation capacity of the battery by querying a pre-stored relationship table of the discharge power, the electric core temperature value, the percentage of remaining power of the battery pack, and the heat dissipation capacity of the battery based on the real-time discharge power, the electric core temperature value, and the percentage of remaining power of the battery pack.
In an example, table 2 shows a relation table of discharge power, cell temperature, percentage of remaining battery capacity of the battery pack, and heat dissipation capacity of the battery:
TABLE 2
As shown in table 2, when the discharge power of the current battery pack is 5kW at-20 ℃.
After determining the battery heat dissipation based on the real-time discharge power, step 204 is performed.
Step 204: determining an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation amount.
Alternatively, the ECU may calculate the instantaneous temperature rise heating rate from the battery heat dissipation amount, specifically, by:
substep A1: and acquiring the heat dissipating capacity of at least two batteries within preset calculating time.
Since the battery may change heat with time, the heat dissipated by the plurality of batteries within the preset calculation time may be obtained, where the preset calculation time may be 30 seconds or 40 seconds, and this is not specifically limited in this embodiment of the application, and may be marked and adjusted according to an actual application scenario.
The heat dissipation capacity of one battery can be obtained every second within the preset calculation time, the problem of frequent oscillation of the heater can be avoided, and the stability of the heater is improved.
Substep a 2: and averaging the heat dissipating capacity of at least two batteries to obtain the average heat dissipating capacity of the batteries.
The ECU may average all of the heat radiation amounts of the battery acquired within a preset calculation time to acquire an average heat radiation amount of the battery.
Substep a 3: determining the instantaneous temperature rise heating rate based on the average heat dissipation amount.
The ECU may determine an instantaneous temperature rise heating rate from an average heat dissipation amount (Q) according to an instantaneous temperature rise heating rate (V1) ═ Q/CM, where C denotes a heat capacity of the battery pack and M denotes a mass of the battery pack.
After determining the instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation amount, step 205 is performed.
Step 205: determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate.
In this application, the specific implementation process of step 205 may include:
substep B1: determining a temperature rise rate difference between the instantaneous temperature rise heating rate and the temperature rise target heating rate based on the instantaneous temperature rise heating rate and the temperature rise target heating rate.
The temperature rise rate difference (Δ V) is the heating rate required to be provided by the external heater.
Temperature rise rate difference (Δ V) — instantaneous temperature rise heating rate (V2) — instantaneous temperature rise heating rate (V1).
Substep B2: determining the target heating power based on the temperature rise rate difference.
The target heating power (Q1) is CM Δ V, where C is the heat capacity of the battery pack and M is the mass of the battery pack.
In the present application, the target heating power (Q1) is corrected based on the heat transfer efficiency (η) inside the battery pack and the heat loss coefficient (α) of the pipe, and an updated target heating power (Q3) is obtained.
Wherein Q3 ═ QI/(η ═ α).
After determining the target heating power based on the instantaneous temperature-rising heating rate and the temperature-rising target heating rate, step 206 is performed.
Step 206: controlling heating of the battery pack based on the target heating power.
In the present application, the ECU may control the heater to heat the battery pack based on the target heating power.
According to the battery pack heating control method provided by the embodiment of the invention, under the condition that the temperature of a battery pack is lower than the preset temperature of the battery pack, the temperature rise target heating rate corresponding to the temperature of the battery pack is determined; acquiring real-time discharge power of the battery pack; determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power; determining a target heating power based on the instantaneous temperature-ramping heating rate and the temperature-ramping target heating rate; controlling heating of the battery pack based on the target heating power. In the application, the target heating power can be determined according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, and the battery pack is heated based on the target heating power, so that the corresponding target heating power can be determined according to the current instantaneous temperature rise heating power, the problem of overlarge power consumption loss caused by heating with single maximum power is avoided, the energy consumption loss in the heating process of the battery pack is reduced, and the heat loss in the heating process of the battery pack can be reduced; and determining target heating power according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, wherein the target heating power takes the instantaneous temperature rise heating rate and the temperature rise target heating rate into consideration, so that the error between the actual heating power and the target heating power can be reduced, the energy-saving effect can be achieved, and the stability and the reliability of the vehicle battery pack are further improved.
Referring to fig. 3, a schematic structural diagram of a battery pack heating control device according to a third embodiment of the present invention is shown, where the battery pack heating control device is applied to an electronic controller of a vehicle.
As shown in fig. 3, the battery pack heating control apparatus 300 may specifically include:
the first determining module 301 is configured to determine a temperature increase target heating rate corresponding to a battery pack temperature when the battery pack temperature is lower than a preset battery pack temperature;
an obtaining module 302, configured to obtain real-time discharge power of a battery pack;
a second determining module 303 for determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power;
a third determination module 304 for determining a target heating power based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
a control module 305 for controlling heating of the battery pack based on the target heating power.
Optionally, the second determining module includes:
a first determining submodule for determining a battery heat dissipation based on the real-time discharge power;
a second determination submodule to determine an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation capacity.
Optionally, the third determining power comprises:
a third determination sub-module for determining a temperature rise rate difference between the instantaneous temperature rise heating rate and the temperature rise target heating rate, based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
a fourth determination submodule for determining the target heating power based on the temperature rise rate difference.
Optionally, the first determining module includes:
and the fifth determining submodule is used for determining the temperature rise target heating rate corresponding to the temperature of the battery pack by inquiring a prestored relation table between the temperature of the battery pack and the temperature rise target heating rate under the condition that the temperature of the battery pack is smaller than the preset temperature of the battery pack.
Optionally, the first determining sub-module includes:
the first acquisition unit is used for acquiring the battery core temperature value and the percentage of the residual electric quantity of the battery pack;
and the first determination unit is used for determining the heat dissipation capacity of the battery by inquiring a pre-stored relation table of the discharge power, the cell temperature, the percentage of the residual electric quantity of the battery pack and the heat dissipation capacity of the battery based on the real-time discharge power, the cell temperature value and the percentage of the residual electric quantity of the battery pack.
Optionally, the second determining sub-module includes:
the second acquisition unit is used for acquiring the heat dissipation capacity of at least two batteries within preset calculation time;
the obtaining unit is used for averaging the heat dissipating capacity of at least two batteries to obtain the average heat dissipating capacity of the batteries;
a second determination unit for determining the instantaneous temperature-rising heating rate based on the average heat dissipation amount.
The specific implementation of the battery pack heating control device in the embodiment of the present invention has been described in detail at the method side, and therefore, the detailed description thereof is omitted here.
According to the battery pack heating control device provided by the embodiment of the invention, under the condition that the temperature of a battery pack is lower than the preset temperature of the battery pack, the temperature rise target heating rate corresponding to the temperature of the battery pack is determined; acquiring real-time discharge power of the battery pack; determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power; determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate; controlling heating of the battery pack based on the target heating power. In the application, the target heating power can be determined according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, and the battery pack is heated based on the target heating power, so that the corresponding target heating power can be determined according to the current instantaneous temperature rise heating power, the problem of overlarge power consumption loss caused by heating with single maximum power is avoided, the energy consumption loss in the heating process of the battery pack is reduced, and the heat loss in the heating process of the battery pack can be reduced; and determining target heating power according to the instantaneous temperature rise heating rate and the temperature rise target heating rate, wherein the target heating power takes the instantaneous temperature rise heating rate and the temperature rise target heating rate into consideration, so that the error between the actual heating power and the target heating power can be reduced, the energy-saving effect can be achieved, and the stability and the reliability of the vehicle battery pack are further improved.
The embodiment of the invention also provides a vehicle which comprises the battery pack heating control device.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
While alternative embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the true scope of the embodiments of the invention.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or terminal apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or terminal device comprising the element.
While the technical solutions provided by the present invention have been described in detail, the principles and embodiments of the present invention are described herein by using specific examples, and meanwhile, for a person of ordinary skill in the art, according to the principles and implementation manners of the present invention, changes may be made in the specific embodiments and application ranges.
Claims (10)
1. A battery pack heating control method applied to an electronic controller of a vehicle, the method comprising:
under the condition that the temperature of the battery pack is lower than the preset temperature of the battery pack, determining a temperature rise target heating rate corresponding to the temperature of the battery pack;
acquiring real-time discharge power of the battery pack;
determining an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power;
determining a target heating power based on the instantaneous temperature-rise heating rate and the temperature-rise target heating rate;
controlling heating of the battery pack based on the target heating power.
2. The method of claim 1, wherein determining an instantaneous temperature rise heating rate of a battery pack based on the real-time discharge power comprises:
determining a battery heat dissipation based on the real-time discharge power;
determining an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation amount.
3. The method of claim 1, wherein determining a target heating power based on the instantaneous temperature-ramping heating rate and the temperature-ramping target heating rate comprises:
determining a temperature rise rate difference between the instantaneous temperature rise heating rate and the temperature rise target heating rate based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
determining the target heating power based on the temperature rise rate difference.
4. The method according to claim 1, wherein the determining the temperature increase target heating rate corresponding to the battery pack temperature in the case that the battery pack temperature is less than a preset battery pack temperature comprises:
and under the condition that the temperature of the battery pack is smaller than the preset temperature of the battery pack, determining the temperature rise target heating rate corresponding to the temperature of the battery pack by inquiring a prestored relation table between the temperature of the battery pack and the temperature rise target heating rate.
5. The method of claim 2, wherein determining battery heat dissipation based on the real-time discharge power comprises:
acquiring a battery core temperature value and the percentage of the residual electric quantity of the battery pack;
and determining the heat dissipation capacity of the battery by inquiring a pre-stored relation table of the discharge power, the cell temperature, the percentage of the residual electric quantity of the battery pack and the heat dissipation capacity of the battery based on the real-time discharge power, the cell temperature value and the percentage of the residual electric quantity of the battery pack.
6. The method of claim 2, wherein determining an instantaneous temperature rise heating rate of a battery pack based on the battery heat dissipation capacity comprises:
obtaining the heat dissipation capacity of at least two batteries within preset calculation time;
averaging the heat dissipating capacity of at least two batteries to obtain the average heat dissipating capacity of the batteries;
determining the instantaneous temperature rise heating rate based on the average heat dissipation amount.
7. A battery pack heating control apparatus, applied to an electronic controller of a vehicle, the apparatus comprising:
the first determining module is used for determining a temperature rise target heating rate corresponding to the temperature of the battery pack under the condition that the temperature of the battery pack is smaller than the preset temperature of the battery pack;
the acquisition module is used for acquiring the real-time discharge power of the battery pack;
a second determination module to determine an instantaneous temperature rise heating rate of the battery pack based on the real-time discharge power;
a third determination module for determining a target heating power based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
and the control module is used for controlling the heating of the battery pack based on the target heating power.
8. The apparatus of claim 7, wherein the second determining module comprises:
a first determining submodule for determining a battery heat dissipation based on the real-time discharge power;
a second determination submodule for determining an instantaneous temperature rise heating rate of the battery pack based on the battery heat dissipation capacity.
9. The apparatus of claim 7, wherein the third determining the power comprises:
a third determination submodule for determining a temperature rise rate difference between the instantaneous temperature rise heating rate and the temperature rise target heating rate, based on the instantaneous temperature rise heating rate and the temperature rise target heating rate;
a fourth determination submodule for determining the target heating power based on the temperature rise rate difference.
10. A vehicle characterized by comprising the battery pack heating control apparatus according to any one of claims 7 to 9.
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