CN111231764A - Electric vehicle battery thermal management method, electronic equipment and vehicle - Google Patents
Electric vehicle battery thermal management method, electronic equipment and vehicle Download PDFInfo
- Publication number
- CN111231764A CN111231764A CN202010117550.7A CN202010117550A CN111231764A CN 111231764 A CN111231764 A CN 111231764A CN 202010117550 A CN202010117550 A CN 202010117550A CN 111231764 A CN111231764 A CN 111231764A
- Authority
- CN
- China
- Prior art keywords
- battery
- target temperature
- temperature threshold
- heating target
- battery heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007726 management method Methods 0.000 title claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 425
- 230000015654 memory Effects 0.000 claims description 16
- 230000007613 environmental effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 19
- 230000002035 prolonged effect Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an electric automobile battery heat management method, electronic equipment and an automobile, wherein the method comprises the following steps: responding to a vehicle alternating current charging starting event; determining a first battery heating target temperature threshold value and alternating-current charging battery heating prediction time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time; calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the total alternating-current charging predicted time; determining a second battery heating target temperature threshold corresponding to the scaling factor; comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold; the battery is heated to a final battery heating target temperature threshold. The invention gives consideration to the service life of the battery cell (or the discharge capacity of the battery cell) and the alternating current charging time, and carries out thermal management on the battery.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a battery thermal management method for an electric automobile, electronic equipment and an automobile.
Background
The charging power from ac charging (also called slow charging) to the battery pack is typically a constant value (e.g. 3.3kW for a portable ac charging device) within the temperature range of the allowable charging. At this time, when the cell temperature is low (for example, -20 ℃), since the long-term low cell temperature has a great influence on the cycle life of the cell and the discharge capacity of the cell (for example, the discharge capacity of a 0 ℃ ternary lithium ion battery is increased by about 10% from-10 ℃, the effect of raising the cell temperature is more obvious as the lowest initial cell temperature is lower), the battery heating power consumption will increase the ac charging time to some extent, and in order to shorten the ac charging time, the battery target temperature threshold for heating the battery needs to be designed to be low (for example, 0 ℃). However, if the target temperature threshold of the battery for heating the battery is required to be increased to 25 ℃ (for example, the optimum working temperature range of the lithium ion battery is 25 ℃ -30 ℃) in order to prolong the cycle life of the battery cell and increase the discharge capacity of the battery cell, the ac charging time is increased, the customer experience is affected, the customer complaints that the charging of the whole vehicle is slow are easily caused, and even if the battery is continuously heated in the case of approaching full charge, the electric quantity may gradually decrease in the ac charging process due to the power consumption of the battery during heating.
Disclosure of Invention
Therefore, it is necessary to provide a battery thermal management method for an electric vehicle, an electronic device and a vehicle, aiming at the technical problem that the battery heating is contradictory in the alternating current charging of the electric vehicle in the prior art.
The invention provides a battery thermal management method for an electric automobile, which comprises the following steps:
responding to a vehicle alternating current charging starting event;
determining a first battery heating target temperature threshold value and alternating-current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time;
calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the heating predicted total time of the alternating-current charging battery, wherein the alternating-current charging predicted total time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery;
determining a second battery heating target temperature threshold corresponding to the scaling factor;
comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold;
heating the battery to the final battery heating target temperature threshold.
The method controls the battery heating target temperature threshold based on the proportional factor of the alternating-current charging battery heating predicted time and the alternating-current charging predicted total time, gives consideration to the service life of the battery core (or the discharge capacity of the battery core) and the alternating-current charging time, and conducts thermal management on the battery.
Further, the second battery heating target temperature threshold corresponding to the scaling factor with the larger value is less than or equal to the second battery heating target temperature threshold corresponding to the scaling factor with the smaller value.
In the embodiment, under the conditions that the temperature of the battery core is low and the State of Charge (SOC) of the vehicle slow charging initial battery is low, the influence of the alternating current charging time increased by the heating power consumption of the battery is small, so that the target temperature threshold of the battery heating is improved, the temperature of the battery core is heated to a reasonable temperature range, the service life is properly prolonged, and the charging experience of a customer is not influenced; and under the condition that the initial SOC of the vehicle slow charging is high, in order to not influence the alternating current charging time, the battery temperature heating target threshold value is properly adjusted according to the scale factor Y so as to ensure the charging experience of customers.
Further, the determining a first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the ac charging start time specifically includes:
acquiring the lowest temperature of a battery cell at the initial moment of alternating current charging and the environmental temperature at the initial moment of alternating current charging;
according to the lowest temperature of the battery core and the environment temperature, determining a first battery heating target temperature threshold, wherein the first battery heating target temperature threshold meets the following requirements:
compared with other battery heating target temperature thresholds, the increment difference corresponding to the first battery heating target temperature threshold is the largest, and the increment difference corresponding to the first battery heating target temperature threshold is as follows: the difference value between the increase amount of the battery discharge power after the battery is heated to the first battery heating target temperature threshold and the power consumption when the battery is heated to the first battery heating target temperature threshold at the ambient temperature.
The setting of the first battery heating target temperature threshold value of the present embodiment enables the maximum benefit to be obtained for the battery heating.
Further, the comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold specifically includes:
selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery charge state of the battery at the initial alternating-current charging time;
comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value according to the comparison mode;
and according to the comparison result, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold.
The present embodiment selects the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge, so that the battery heating can be adapted to different initial battery states of charge.
Further, the selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge of the battery at the ac charging initial time specifically includes:
if the initial battery state of charge of the battery at the initial moment of alternating-current charging is greater than or equal to a preset state of charge comparison threshold, selecting a first comparison mode, and selecting the minimum value of a first battery heating target temperature threshold and a second battery heating target temperature threshold as a final battery heating target temperature threshold in the first comparison mode;
and if the initial battery state of charge of the battery at the initial moment of alternating current charging is smaller than a preset state of charge comparison threshold, selecting a second comparison mode, and selecting the maximum value of the first battery heating target temperature threshold and the second battery heating target temperature threshold as a final battery heating target temperature threshold in the second comparison mode.
In the embodiment, under the conditions that the temperature of the battery core is low and the charge state of the initial battery for slow charging of the vehicle is low, the total charging time is long, so that the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is small, the heating target temperature threshold of the battery is improved, and the charging experience of a customer is not influenced, so that the temperature of the battery core is heated to a reasonable temperature range by improving the heating target temperature threshold of the battery, and the service life is properly prolonged; and under the condition that the initial SOC of the vehicle slow charging is high, considering that the total charging time is short, the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is large, and in order not to influence the alternating current charging time, a small battery heating target temperature threshold value is selected to ensure the charging experience of a customer.
The invention provides an electric automobile battery thermal management electronic device, which comprises:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the one processor to cause the at least one processor to:
responding to a vehicle alternating current charging starting event;
determining a first battery heating target temperature threshold value and alternating-current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time;
calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the heating predicted total time of the alternating-current charging battery, wherein the alternating-current charging predicted total time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery;
determining a second battery heating target temperature threshold corresponding to the scaling factor;
comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold;
heating the battery to the final battery heating target temperature threshold.
The method controls the battery heating target temperature threshold based on the proportional factor of the alternating-current charging battery heating predicted time and the alternating-current charging predicted total time, gives consideration to the service life of the battery core (or the discharge capacity of the battery core) and the alternating-current charging time, and conducts thermal management on the battery.
Further, the second battery heating target temperature threshold corresponding to the scaling factor with the larger value is less than or equal to the second battery heating target temperature threshold corresponding to the scaling factor with the smaller value.
In the embodiment, under the conditions that the temperature of the battery core is low and the State of Charge (SOC) of the vehicle slow charging initial battery is low, the influence of the alternating current charging time increased by the heating power consumption of the battery is small, so that the target temperature threshold of the battery heating is improved, the temperature of the battery core is heated to a reasonable temperature range, the service life is properly prolonged, and the charging experience of a customer is not influenced; and under the condition that the initial SOC of the vehicle slow charging is high, in order to not influence the alternating current charging time, the battery temperature heating target threshold value is properly adjusted according to the scale factor Y so as to ensure the charging experience of customers.
Further, the determining a first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the ac charging start time specifically includes:
acquiring the lowest temperature of a battery cell at the initial moment of alternating current charging and the environmental temperature at the initial moment of alternating current charging;
according to the lowest temperature of the battery core and the environment temperature, determining a first battery heating target temperature threshold, wherein the first battery heating target temperature threshold meets the following requirements:
compared with other battery heating target temperature thresholds, the increment difference corresponding to the first battery heating target temperature threshold is the largest, and the increment difference corresponding to the first battery heating target temperature threshold is as follows: the difference value between the increase amount of the battery discharge power after the battery is heated to the first battery heating target temperature threshold and the power consumption when the battery is heated to the first battery heating target temperature threshold at the ambient temperature.
The setting of the first battery heating target temperature threshold value of the present embodiment enables the maximum benefit to be obtained for the battery heating.
Further, the comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold specifically includes:
selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery charge state of the battery at the initial alternating-current charging time;
comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value according to the comparison mode;
and according to the comparison result, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold.
The present embodiment selects the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge, so that the battery heating can be adapted to different initial battery states of charge.
Further, the selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge of the battery at the ac charging initial time specifically includes:
if the initial battery state of charge of the battery at the initial moment of alternating-current charging is greater than or equal to a preset state of charge comparison threshold, selecting a first comparison mode, and selecting the minimum value of a first battery heating target temperature threshold and a second battery heating target temperature threshold as a final battery heating target temperature threshold in the first comparison mode;
and if the initial battery state of charge of the battery at the initial moment of alternating current charging is smaller than a preset state of charge comparison threshold, selecting a second comparison mode, and selecting the maximum value of the first battery heating target temperature threshold and the second battery heating target temperature threshold as a final battery heating target temperature threshold in the second comparison mode.
In the embodiment, under the conditions that the temperature of the battery core is low and the charge state of the initial battery for slow charging of the vehicle is low, the total charging time is long, so that the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is small, the heating target temperature threshold of the battery is improved, and the charging experience of a customer is not influenced, so that the temperature of the battery core is heated to a reasonable temperature range by improving the heating target temperature threshold of the battery, and the service life is properly prolonged; and under the condition that the initial SOC of the vehicle slow charging is high, considering that the total charging time is short, the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is large, and in order not to influence the alternating current charging time, a small battery heating target temperature threshold value is selected to ensure the charging experience of a customer.
The invention provides an automobile which comprises an automobile body and the electronic equipment, wherein the electronic equipment controls the temperature of a battery of the automobile body.
The method controls the battery heating target temperature threshold based on the proportional factor of the alternating-current charging battery heating predicted time and the alternating-current charging predicted total time, gives consideration to the service life of the battery core (or the discharge capacity of the battery core) and the alternating-current charging time, and conducts thermal management on the battery.
Drawings
Fig. 1 is a flowchart illustrating a method for thermal management of a battery of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for thermal management of a battery of an electric vehicle according to a preferred embodiment of the present invention;
FIG. 3 illustrates a battery heating system used in one embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of an electric vehicle battery thermal management electronic device according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Fig. 1 is a flowchart illustrating a method for thermal management of a battery of an electric vehicle according to an embodiment of the present invention, including:
step S101, responding to a vehicle alternating current charging starting event;
step S102, determining a first battery heating target temperature threshold value and alternating-current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time;
step S103, calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the total alternating-current charging predicted time, wherein the total alternating-current charging predicted time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery;
step S104, determining a second battery heating target temperature threshold corresponding to the scale factor;
step S105, comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value, and selecting the first battery heating target temperature threshold value or the second battery heating target temperature threshold value as a final battery heating target temperature threshold value;
and step S106, heating the battery to the final battery heating target temperature threshold.
Specifically, the invention is mainly applied to an Electronic Control Unit (ECU) on a vehicle, in particular to a thermal management controller of a whole vehicle. The whole vehicle thermal management controller receives the alternating current charging state signal from the battery management control module, and accordingly whether the whole vehicle is in the alternating current charging state can be judged. When the whole vehicle is in an alternating current charging state, triggering step S101, then executing step S102, and determining a first battery heating target temperature threshold value and an alternating current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the alternating current charging start time. Specifically, the predicted ac rechargeable battery heating time may be obtained by looking up a table, where the time parameter is a set of data, i.e. different battery temperature heating target thresholds, corresponding to different predicted ac rechargeable battery heating times [ t1, t2, t3, …, tn ]. Step S103, calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the total alternating-current charging predicted time, wherein the total alternating-current charging predicted time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery. The ac charging prediction time [ total battery power amount x (1-starting battery SOC) ] divided by the ac charging power under the battery non-heating condition can be calculated from the starting battery State of charge (SOC) at the ac charging starting time. Then, the scaling factor Y ═ (predicted ac charging battery heating time ÷ predicted ac charging total time) × 100% was calculated. Step S104 is to determine a second battery heating target temperature threshold corresponding to the scaling factor, and the corresponding relation between the second battery heating target temperature threshold and the scaling factor can be determined through calibration tests according to different vehicle types and battery pack types. And then acquiring the corresponding second battery heating target temperature threshold value for different scale factors by means of table lookup, for example. Step S105 selects the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold, and in step S106, heats the battery to the final battery heating target temperature threshold. Heating the battery to the final battery heating target temperature threshold, specifically: and the finished automobile heat management controller starts a battery high-pressure heater to heat the cooling liquid of the battery water path circulating system according to the calculated final battery heating target temperature threshold value, so that the lowest temperature of the battery core reaches the final battery heating target temperature threshold value.
The method controls the battery heating target temperature threshold based on the proportional factor of the alternating-current charging battery heating predicted time and the alternating-current charging predicted total time, gives consideration to the service life of the battery core (or the discharge capacity of the battery core) and the alternating-current charging time, and conducts thermal management on the battery.
In one embodiment, the second battery heating target temperature threshold corresponding to the scaling factor with the larger value is less than or equal to the second battery heating target temperature threshold corresponding to the scaling factor with the smaller value.
Specifically, the smaller the value of the scale factor Y, the larger the corresponding second battery heating target temperature threshold value, and the larger the value of the scale factor Y, the smaller the corresponding second battery heating target temperature threshold value, so that a second battery heating target temperature threshold value T2 can be obtained by the scale factor Y.
Preferably, the scaling factor and the corresponding second battery heating target temperature threshold may be set in the manner as table 1.
TABLE 1 comparison table of scale factors and second battery heating target temperature thresholds
Wherein, T21> T22> T23> T24> T25> T26, Y1< Y2< Y3< Y4< Y5.
In the embodiment, under the conditions that the temperature of the battery core is low and the State of Charge (SOC) of the vehicle slow charging initial battery is low, the influence of the alternating current charging time increased by the heating power consumption of the battery is small, so that the target temperature threshold of the battery heating is improved, the temperature of the battery core is heated to a reasonable temperature range, the service life is properly prolonged, and the charging experience of a customer is not influenced; and under the condition that the initial SOC of the vehicle slow charging is high, in order to not influence the alternating current charging time, the battery temperature heating target threshold value is properly adjusted according to the scale factor Y so as to ensure the charging experience of customers.
In one embodiment, the determining a first battery heating target temperature threshold based on the lowest cell temperature of the battery at the ac charging start time specifically includes:
acquiring the lowest temperature of a battery cell at the initial moment of alternating current charging and the environmental temperature at the initial moment of alternating current charging;
according to the lowest temperature of the battery core and the environment temperature, determining a first battery heating target temperature threshold, wherein the first battery heating target temperature threshold meets the following requirements:
compared with other battery heating target temperature thresholds, the increment difference corresponding to the first battery heating target temperature threshold is the largest, and the increment difference corresponding to the first battery heating target temperature threshold is as follows: the difference value between the increase amount of the battery discharge power after the battery is heated to the first battery heating target temperature threshold and the power consumption when the battery is heated to the first battery heating target temperature threshold at the ambient temperature.
Specifically, under the condition of a given environmental temperature and a given starting electrical core minimum temperature, the optimal threshold value of the first battery heating target temperature threshold value should be the battery heating target temperature threshold value T1 corresponding to the maximum value of the difference between the increase amount of the battery discharge power after the battery is heated and the power consumption amount of the battery during heating, so that the ac rechargeable battery heating predicted time tn under the ac rechargeable battery heating starting condition can be obtained.
The setting of the first battery heating target temperature threshold value of the present embodiment enables the maximum benefit to be obtained for the battery heating.
In one embodiment, the comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as the final battery heating target temperature threshold specifically includes:
selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery charge state of the battery at the initial alternating-current charging time;
comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value according to the comparison mode;
and according to the comparison result, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold.
The present embodiment selects the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge, so that the battery heating can be adapted to different initial battery states of charge.
In one embodiment, the selecting the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge of the battery at the ac charging initial time specifically includes:
if the initial battery state of charge of the battery at the initial moment of alternating-current charging is greater than or equal to a preset state of charge comparison threshold, selecting a first comparison mode, and selecting the minimum value of a first battery heating target temperature threshold and a second battery heating target temperature threshold as a final battery heating target temperature threshold in the first comparison mode;
and if the initial battery state of charge of the battery at the initial moment of alternating current charging is smaller than a preset state of charge comparison threshold, selecting a second comparison mode, and selecting the maximum value of the first battery heating target temperature threshold and the second battery heating target temperature threshold as a final battery heating target temperature threshold in the second comparison mode.
Specifically, the first battery heating target temperature threshold T1 and the second battery heating target temperature threshold T2 are compared as follows:
under the condition that the vehicle AC charging initial SOC is higher (such as being equal to or more than SOC1),
if T1 ≦ T2, the final implemented target temperature threshold is T1;
if T1 > T2, the final implemented target temperature threshold is T2.
In the case where the vehicle ac charging start SOC is low (such as < SOC1),
if T1 ≦ T2, the final implemented target temperature threshold is T2;
if T1 > T2, the final implemented target temperature threshold is T1.
In the embodiment, under the conditions that the temperature of the battery core is low and the charge state of the initial battery for slow charging of the vehicle is low, the total charging time is long, so that the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is small, the heating target temperature threshold of the battery is improved, and the charging experience of a customer is not influenced, so that the temperature of the battery core is heated to a reasonable temperature range by improving the heating target temperature threshold of the battery, and the service life is properly prolonged; and under the condition that the initial SOC of the vehicle slow charging is high, considering that the total charging time is short, the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is large, and in order not to influence the alternating current charging time, a small battery heating target temperature threshold value is selected to ensure the charging experience of a customer.
Fig. 2 is a flowchart illustrating a method for thermal management of an electric vehicle battery according to a preferred embodiment of the present invention, including:
step S201: the whole vehicle thermal management controller receives an alternating current charging state signal from the battery management control module, and accordingly whether the whole vehicle is in an alternating current charging state can be judged;
step S202: when the vehicle is in an alternating current charging state, the vehicle thermal management controller receives an SOC signal from the battery management control module, and records an SOC value at the initial moment of alternating current charging;
step S203: the whole vehicle thermal management controller receives a cell lowest temperature signal from the battery management control module, and records a cell lowest temperature value at the initial moment of alternating current charging;
step S204: the whole vehicle heat management controller acquires the ambient temperature through an ambient temperature sensor;
step S205: the whole vehicle thermal management controller obtains the heating predicted time of the alternating-current rechargeable battery according to MAP (MAP) charts of time required by battery temperature heating target thresholds corresponding to different environment temperatures and different initial battery core minimum temperatures, wherein the time parameter is a group of data, namely the heating predicted time [ t1, t2, t3, …, tn ] of the alternating-current rechargeable battery corresponding to different battery temperature heating target thresholds;
step S206: under the conditions of given environment temperature and lowest initial electric core temperature, determining that the optimal threshold value of the battery heating target temperature threshold value is a battery heating target temperature threshold value corresponding to the maximum value of the difference value of the electric quantity of the battery after the battery is heated minus the electric quantity of the battery during heating, and taking the battery heating target temperature threshold value as a first battery heating target temperature threshold value T1, so that the heating predicted time tn of the alternating-current charging battery under the heating initial working condition of the alternating-current charging battery can be obtained.
Step S207: the entire vehicle thermal management controller can calculate and obtain the alternating current charging predicted time under the working condition that the battery is not heated according to the total battery electric quantity and the alternating current charging power received from the battery management control module and the initial SOC recorded in the step S202;
step S208: and calculating a scaling factor Y of the predicted heating time of the alternating-current charging battery and the predicted total alternating-current charging time according to the data obtained in the steps S205 to S207, and obtaining a second battery heating target temperature threshold T2 through the scaling factor Y.
Step S209: based on the calculation results in step S206 and step S208, an optimal battery heating target temperature value controlled by the entire vehicle thermal management controller may be obtained, so as to take account of the battery cell service life (or the battery cell discharge capacity) and the ac charging time (or the customer charging experience).
The judgment conditions are as follows:
under the condition that the initial SOC of the vehicle alternating current charging is higher (such as more than or equal to 60 percent),
if T1 ≦ T2, the final implemented target temperature threshold is T1;
if T1 > T2, the final implemented target temperature threshold is T2.
In the case where the vehicle ac charging start SOC is low (e.g. < 60%),
if T1 ≦ T2, the final implemented target temperature threshold is T2;
if T1 > T2, the final implemented target temperature threshold is T1.
Step S210: and the finished automobile heat management controller starts the battery high-pressure heater to heat the cooling liquid of the battery water path circulating system according to the calculated battery heating target temperature threshold value, so that the lowest temperature of the battery core reaches the finally executed battery heating target temperature threshold value.
Specifically, the electric vehicle battery thermal management method designed by the invention is a control method for controlling the battery heating threshold value based on a proportional factor of the alternating current charging battery heating predicted time and the alternating current charging predicted total time.
And the heating prediction time of the alternating-current rechargeable battery is predicted and calculated by taking the environment temperature, the lowest temperature of the battery core and the battery heating target temperature threshold as references. And predicting the time required by battery heating target temperature thresholds corresponding to different environmental temperatures and different initial cell lowest temperatures which are required to be obtained through a whole vehicle battery heating calibration test before calculation, and performing table look-up according to a MAP graph obtained by the whole vehicle battery heating calibration test to obtain the heating predicted time of the alternating-current rechargeable battery, wherein the table look-up is used for obtaining a group of heating predicted time data of the alternating-current rechargeable battery [ t1, t2, t3, …, tn ]. And under the conditions of the given environment temperature and the lowest initial electric core temperature, the optimal threshold value of the battery heating target temperature threshold value is a battery heating target temperature threshold value corresponding to the maximum value of the difference value of the electric power consumption of electric core heating subtracted by the electric core discharging electric quantity after the electric core is heated, namely a first battery heating target temperature threshold value T1, so that the heating predicted time tn of the alternating-current rechargeable battery under the heating initial working condition of the alternating-current rechargeable battery can be obtained.
The total AC charging prediction time is predicted and calculated by taking the environmental temperature, the lowest temperature of the battery core, the battery heating target temperature threshold, the initial battery SOC (state of charge), the AC charging power and the rated total electric quantity of the battery pack as references. The total predicted AC charging time is the sum of the predicted AC charging time under the condition that the battery is not heated and the predicted heating time of the AC charging battery. The predicted ac charging time under the battery non-heating condition is calculated from the initial battery SOC (state of charge), the rated total electric quantity of the battery pack, and the ac charging power, and the predicted ac charging time under the battery non-heating condition is [ total battery electric quantity x (1-initial battery SOC) ]/[ ac charging power ].
The scaling factor Y of the heating predicted time of the AC charging battery and the total AC charging predicted time is defined as follows: y ═ ac charging predicted time ÷ (ac charging predicted total time) × 100%.
According to the scale factor Y, the optimal battery heating target temperature threshold is determined through a heating calibration test of the alternating current rechargeable battery of the whole vehicle, the smaller the value of Y is, the larger the corresponding second battery heating target temperature threshold is, the larger the value of Y is, the smaller the corresponding second battery heating target temperature threshold is, and the second battery heating target temperature threshold T2 can be obtained through the scale factor Y. Taking a ternary lithium ion battery as an example, the Y numerical value is shown in a calculation table 1, and calibration test values are different according to different vehicle types and battery pack types. After the heating control method of the alternating-current rechargeable battery is designed, under the conditions that the temperature of the battery core is low and the initial SOC of the slow charging of the vehicle is low, the influence of the charging time increased due to the power consumption caused by the heating of the battery is small, the charging experience of a client is not influenced, meanwhile, the temperature of the battery core is heated to a more reasonable temperature range, and the service life is properly prolonged; and under the condition that the initial SOC of the vehicle slow charging is high, in order to not influence the alternating current charging time, the battery temperature heating target threshold value is properly adjusted according to the scale factor Y so as to ensure the charging experience of customers.
Finally, heating can be performed by using a battery heating system as shown in fig. 3, the battery heating system comprising: the system comprises a finished automobile heat management controller 1, a battery pack 2, a battery management control module 3, a battery water pump 4, a battery high-pressure heater 5, a battery cooler 6, an ambient temperature sensor 7 and a refrigerant high-low pressure pipeline 8.
The method for managing the battery of the electric vehicle in the above embodiment is not limited to the battery heating system of the invention.
Fig. 4 is a schematic diagram of a hardware structure of an electric vehicle battery thermal management electronic device according to the present invention, including:
at least one processor 401; and the number of the first and second groups,
a memory 402 communicatively coupled to the at least one processor 401; wherein,
the memory 402 stores instructions executable by the one processor to cause the at least one processor to:
responding to a vehicle alternating current charging starting event;
determining a first battery heating target temperature threshold value and alternating-current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time;
calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the heating predicted total time of the alternating-current charging battery, wherein the alternating-current charging predicted total time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery;
determining a second battery heating target temperature threshold corresponding to the scaling factor;
comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold;
heating the battery to the final battery heating target temperature threshold.
The Electronic device is preferably an Electronic Control Unit (ECU) of the current vehicle, such as a vehicle thermal management controller. In fig. 4, one processor 401 is taken as an example.
The electronic device may further include: an input device 403 and a display device 404.
The processor 401, the memory 402, the input device 403, and the display device 404 may be connected by a bus or other means, and are illustrated as being connected by a bus.
The memory 402, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the thermal management method for the battery of the electric vehicle in the embodiment of the present application, for example, the method flow shown in fig. 1. The processor 401 executes various functional applications and data processing by running nonvolatile software programs, instructions and modules stored in the memory 402, so as to implement the electric vehicle battery thermal management method in the above embodiment.
The memory 402 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the electric vehicle battery thermal management method, and the like. Further, the memory 402 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 402 may optionally include memory located remotely from the processor 401, and these remote memories may be connected over a network to a device that performs the method for electric vehicle battery thermal management. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 403 may receive input from a user and generate signal inputs related to user settings and functional control of the electric vehicle battery thermal management method. The display device 404 may include a display screen or the like.
When the one or more modules are stored in the memory 402, the method for electric vehicle battery thermal management in any of the above method embodiments is performed when executed by the one or more processors 401.
The method controls the battery heating target temperature threshold based on the proportional factor of the alternating-current charging battery heating predicted time and the alternating-current charging predicted total time, gives consideration to the service life of the battery core (or the discharge capacity of the battery core) and the alternating-current charging time, and conducts thermal management on the battery.
In one embodiment, the second battery heating target temperature threshold corresponding to the scaling factor with the larger value is less than or equal to the second battery heating target temperature threshold corresponding to the scaling factor with the smaller value.
In the embodiment, under the conditions that the temperature of the battery core is low and the State of Charge (SOC) of the vehicle slow charging initial battery is low, the influence of the alternating current charging time increased by the heating power consumption of the battery is small, so that the target temperature threshold of the battery heating is improved, the temperature of the battery core is heated to a reasonable temperature range, the service life is properly prolonged, and the charging experience of a customer is not influenced; and under the condition that the initial SOC of the vehicle slow charging is high, in order to not influence the alternating current charging time, the battery temperature heating target threshold value is properly adjusted according to the scale factor Y so as to ensure the charging experience of customers.
In one embodiment, the determining a first battery heating target temperature threshold based on the lowest cell temperature of the battery at the ac charging start time specifically includes:
acquiring the lowest temperature of a battery cell at the initial moment of alternating current charging and the environmental temperature at the initial moment of alternating current charging;
according to the lowest temperature of the battery core and the environment temperature, determining a first battery heating target temperature threshold, wherein the first battery heating target temperature threshold meets the following requirements:
compared with other battery heating target temperature thresholds, the increment difference corresponding to the first battery heating target temperature threshold is the largest, and the increment difference corresponding to the first battery heating target temperature threshold is as follows: the difference value between the increase amount of the battery discharge power after the battery is heated to the first battery heating target temperature threshold and the power consumption when the battery is heated to the first battery heating target temperature threshold at the ambient temperature.
The setting of the first battery heating target temperature threshold value of the present embodiment enables the maximum benefit to be obtained for the battery heating.
In one embodiment, the comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as the final battery heating target temperature threshold specifically includes:
selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery charge state of the battery at the initial alternating-current charging time;
comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value according to the comparison mode;
and according to the comparison result, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold.
The present embodiment selects the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge, so that the battery heating can be adapted to different initial battery states of charge.
In one embodiment, the selecting the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge of the battery at the ac charging initial time specifically includes:
if the initial battery state of charge of the battery at the initial moment of alternating-current charging is greater than or equal to a preset state of charge comparison threshold, selecting a first comparison mode, and selecting the minimum value of a first battery heating target temperature threshold and a second battery heating target temperature threshold as a final battery heating target temperature threshold in the first comparison mode;
and if the initial battery state of charge of the battery at the initial alternating current charging time is smaller than a preset state of charge comparison threshold value at the temperature, selecting a second comparison mode, and selecting the maximum value of the first battery heating target temperature threshold value and the second battery heating target temperature threshold value as a final battery heating target temperature threshold value in the second comparison mode.
In the embodiment, under the conditions that the temperature of the battery core is low and the charge state of the initial battery for slow charging of the vehicle is low, the total charging time is long, so that the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is small, the heating target temperature threshold of the battery is improved, and the charging experience of a customer is not influenced, so that the temperature of the battery core is heated to a reasonable temperature range by improving the heating target temperature threshold of the battery, and the service life is properly prolonged; and under the condition that the initial SOC of the vehicle slow charging is high, considering that the total charging time is short, the ratio of the alternating current charging time increased by the heating power consumption of the battery to the total charging time is large, and in order not to influence the alternating current charging time, a small battery heating target temperature threshold value is selected to ensure the charging experience of a customer.
The invention provides an automobile which comprises an automobile body and the electronic equipment, wherein the electronic equipment controls the temperature of a battery of the automobile body.
The method controls the battery heating target temperature threshold based on the proportional factor of the alternating-current charging battery heating predicted time and the alternating-current charging predicted total time, gives consideration to the service life of the battery core (or the discharge capacity of the battery core) and the alternating-current charging time, and conducts thermal management on the battery.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A battery thermal management method for an electric vehicle is characterized by comprising the following steps:
responding to a vehicle alternating current charging starting event;
determining a first battery heating target temperature threshold value and alternating-current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time;
calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the heating predicted total time of the alternating-current charging battery, wherein the alternating-current charging predicted total time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery;
determining a second battery heating target temperature threshold corresponding to the scaling factor;
comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold;
heating the battery to the final battery heating target temperature threshold.
2. The electric vehicle battery thermal management method according to claim 1, wherein the second battery heating target temperature threshold corresponding to the scaling factor with the larger numerical value is less than or equal to the second battery heating target temperature threshold corresponding to the scaling factor with the smaller numerical value.
3. The electric vehicle battery thermal management method according to claim 1, wherein the determining a first battery heating target temperature threshold based on a lowest cell temperature of the battery at an ac charging start time specifically includes:
acquiring the lowest temperature of a battery cell at the initial moment of alternating current charging and the environmental temperature at the initial moment of alternating current charging;
according to the lowest temperature of the battery core and the environment temperature, determining a first battery heating target temperature threshold, wherein the first battery heating target temperature threshold meets the following requirements:
compared with other battery heating target temperature thresholds, the increment difference corresponding to the first battery heating target temperature threshold is the largest, and the increment difference corresponding to the first battery heating target temperature threshold is as follows: the difference value between the increase amount of the battery discharge power after the battery is heated to the first battery heating target temperature threshold and the power consumption when the battery is heated to the first battery heating target temperature threshold at the ambient temperature.
4. The electric vehicle battery thermal management method according to claim 1, wherein the comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold specifically comprises:
selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery charge state of the battery at the initial alternating-current charging time;
comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value according to the comparison mode;
and according to the comparison result, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold.
5. The electric vehicle battery thermal management method according to claim 4, wherein the selecting the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge of the battery at the ac charging start time specifically comprises:
if the initial battery state of charge of the battery at the initial moment of alternating-current charging is greater than or equal to a preset state of charge comparison threshold, selecting a first comparison mode, and selecting the minimum value of a first battery heating target temperature threshold and a second battery heating target temperature threshold as a final battery heating target temperature threshold in the first comparison mode;
and if the initial battery state of charge of the battery at the initial moment of alternating current charging is smaller than a preset state of charge comparison threshold, selecting a second comparison mode, and selecting the maximum value of the first battery heating target temperature threshold and the second battery heating target temperature threshold as a final battery heating target temperature threshold in the second comparison mode.
6. An electric vehicle battery thermal management electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the one processor to cause the at least one processor to:
responding to a vehicle alternating current charging starting event;
determining a first battery heating target temperature threshold value and alternating-current charging battery heating predicted time corresponding to the first battery heating target temperature threshold value based on the lowest cell temperature of the battery at the initial alternating-current charging time;
calculating a proportional factor of the heating predicted time of the alternating-current charging battery and the heating predicted total time of the alternating-current charging battery, wherein the alternating-current charging predicted total time is the sum of the alternating-current charging predicted time under the working condition that the battery is not heated and the heating predicted time of the alternating-current charging battery;
determining a second battery heating target temperature threshold corresponding to the scaling factor;
comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold;
heating the battery to the final battery heating target temperature threshold.
7. The electric vehicle battery thermal management electronic device of claim 6, wherein the second battery heating target temperature threshold corresponding to the scaling factor with the larger value is less than or equal to the second battery heating target temperature threshold corresponding to the scaling factor with the smaller value.
8. The electric vehicle battery thermal management electronic device according to claim 6, wherein the determining a first battery heating target temperature threshold based on a lowest cell temperature of the battery at an ac charging start time specifically includes:
acquiring the lowest temperature of a battery cell at the initial moment of alternating current charging and the environmental temperature at the initial moment of alternating current charging;
according to the lowest temperature of the battery core and the environment temperature, determining a first battery heating target temperature threshold, wherein the first battery heating target temperature threshold meets the following requirements:
compared with other battery heating target temperature thresholds, the increment difference corresponding to the first battery heating target temperature threshold is the largest, and the increment difference corresponding to the first battery heating target temperature threshold is as follows: the difference value between the increase amount of the battery discharge power after the battery is heated to the first battery heating target temperature threshold and the power consumption when the battery is heated to the first battery heating target temperature threshold at the ambient temperature.
9. The electric vehicle battery thermal management electronic device according to claim 6, wherein the comparing the first battery heating target temperature threshold with the second battery heating target temperature threshold, and selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold specifically includes:
selecting a comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery charge state of the battery at the initial alternating-current charging time;
comparing the first battery heating target temperature threshold value with the second battery heating target temperature threshold value according to the comparison mode;
and according to the comparison result, selecting the first battery heating target temperature threshold or the second battery heating target temperature threshold as a final battery heating target temperature threshold.
10. The electric vehicle battery thermal management electronic device according to claim 9, wherein the selecting the comparison mode of the first battery heating target temperature threshold and the second battery heating target temperature threshold according to the initial battery state of charge of the battery at the ac charging start time specifically includes:
if the initial battery state of charge of the battery at the initial moment of alternating-current charging is greater than or equal to a preset state of charge comparison threshold, selecting a first comparison mode, and selecting the minimum value of a first battery heating target temperature threshold and a second battery heating target temperature threshold as a final battery heating target temperature threshold in the first comparison mode;
and if the initial battery state of charge of the battery at the initial moment of alternating current charging is smaller than a preset state of charge comparison threshold, selecting a second comparison mode, and selecting the maximum value of the first battery heating target temperature threshold and the second battery heating target temperature threshold as a final battery heating target temperature threshold in the second comparison mode.
11. An automobile characterized by comprising an automobile body, and the electronic device according to any one of claims 6 to 10, which controls the battery temperature of the automobile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010117550.7A CN111231764B (en) | 2020-02-25 | 2020-02-25 | Electric vehicle battery thermal management method, electronic equipment and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010117550.7A CN111231764B (en) | 2020-02-25 | 2020-02-25 | Electric vehicle battery thermal management method, electronic equipment and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111231764A true CN111231764A (en) | 2020-06-05 |
| CN111231764B CN111231764B (en) | 2021-08-03 |
Family
ID=70875044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010117550.7A Active CN111231764B (en) | 2020-02-25 | 2020-02-25 | Electric vehicle battery thermal management method, electronic equipment and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111231764B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113352944A (en) * | 2021-05-31 | 2021-09-07 | 重庆长安新能源汽车科技有限公司 | Method and system for determining thermal management parameters of power battery based on low-temperature quick charge |
| CN117301965A (en) * | 2023-11-10 | 2023-12-29 | 北京新能源汽车股份有限公司 | Heating strategy determination method and device for low-temperature driving, storage medium and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931111A (en) * | 2009-06-18 | 2010-12-29 | 比亚迪股份有限公司 | Method and device for controlling heating of battery |
| FR2988914A3 (en) * | 2012-03-30 | 2013-10-04 | Renault Sa | Module structure for housing Lithium-ion battery cells in battery module in e.g. electric vehicle, has structure element formed such that spacing is formed between basic walls, where flexible envelope is placed between basic walls |
| CN106394264A (en) * | 2016-05-27 | 2017-02-15 | 奇瑞汽车股份有限公司 | Method and device for quick charging of electric automobile |
| CN107054145A (en) * | 2017-04-28 | 2017-08-18 | 北京新能源汽车股份有限公司 | Charging control method and device, vehicle control unit and electric vehicle |
| CN108886177A (en) * | 2016-03-31 | 2018-11-23 | 西门子移动有限公司 | Method and apparatus for charging to battery |
| WO2019110576A1 (en) * | 2017-12-04 | 2019-06-13 | Klose & Oechsle Gmbh | System and method for controlling a charging temperature of a vehicle battery |
-
2020
- 2020-02-25 CN CN202010117550.7A patent/CN111231764B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931111A (en) * | 2009-06-18 | 2010-12-29 | 比亚迪股份有限公司 | Method and device for controlling heating of battery |
| FR2988914A3 (en) * | 2012-03-30 | 2013-10-04 | Renault Sa | Module structure for housing Lithium-ion battery cells in battery module in e.g. electric vehicle, has structure element formed such that spacing is formed between basic walls, where flexible envelope is placed between basic walls |
| CN108886177A (en) * | 2016-03-31 | 2018-11-23 | 西门子移动有限公司 | Method and apparatus for charging to battery |
| CN106394264A (en) * | 2016-05-27 | 2017-02-15 | 奇瑞汽车股份有限公司 | Method and device for quick charging of electric automobile |
| CN107054145A (en) * | 2017-04-28 | 2017-08-18 | 北京新能源汽车股份有限公司 | Charging control method and device, vehicle control unit and electric vehicle |
| WO2019110576A1 (en) * | 2017-12-04 | 2019-06-13 | Klose & Oechsle Gmbh | System and method for controlling a charging temperature of a vehicle battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113352944A (en) * | 2021-05-31 | 2021-09-07 | 重庆长安新能源汽车科技有限公司 | Method and system for determining thermal management parameters of power battery based on low-temperature quick charge |
| CN113352944B (en) * | 2021-05-31 | 2022-05-06 | 重庆长安新能源汽车科技有限公司 | Method and system for determining thermal management parameters of power battery based on low-temperature quick charge |
| CN117301965A (en) * | 2023-11-10 | 2023-12-29 | 北京新能源汽车股份有限公司 | Heating strategy determination method and device for low-temperature driving, storage medium and vehicle |
| CN117301965B (en) * | 2023-11-10 | 2024-08-23 | 北京新能源汽车股份有限公司 | Heating strategy determination method and device for low-temperature driving, storage medium and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111231764B (en) | 2021-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111175654B (en) | Power battery charging remaining time calculation method and device, vehicle and storage medium | |
| CN111231764B (en) | Electric vehicle battery thermal management method, electronic equipment and vehicle | |
| JP2009512845A (en) | Method for predicting the power capacity of an electrical energy accumulator | |
| CN112824139B (en) | Battery heat preservation method and system for vehicle | |
| JP2011238428A (en) | Secondary battery charging system and charging method | |
| CA2931084A1 (en) | Power storage system and charging method for secondary battery | |
| JP2010259163A (en) | Charging control device and electricity storage system | |
| CN116176358B (en) | Battery thermal management method, device, storage medium and equipment | |
| JP2011099691A (en) | Electric vehicle | |
| JP6290263B2 (en) | How to adjust the battery temperature | |
| CN114217233A (en) | Vehicle residual charging time estimation method and device, vehicle and storage medium | |
| CN116544564A (en) | Test method and device for liquid cooling and heating management of vehicle, liquid cooling unit and electronic equipment | |
| JP2017505603A (en) | How to manage battery charge | |
| KR20140045624A (en) | Keeping warm device and method for battery | |
| JP5853144B2 (en) | Power supply control device and power supply system including the same | |
| JP2012023836A (en) | Charging system and charging method of secondary battery | |
| JP2023543497A (en) | Method, device, storage medium and server for obtaining battery capacity | |
| JP5995804B2 (en) | Storage system management device and control target value determination method | |
| CN116736127B (en) | Method and device for predicting percentage of residual electric quantity of battery in response to temperature change | |
| EP2835598A1 (en) | Method for controlling and device for controlling cogeneration system | |
| CN114987286A (en) | Heat preservation method and device for vehicle power battery, vehicle and storage medium | |
| RU2016130874A (en) | METHOD AND SYSTEM OF MANAGEMENT OF BATTERY OF VEHICLE VEHICLE | |
| CN114750649A (en) | Pure electric vehicle battery heating method and device, computer equipment and storage medium | |
| CN115706444A (en) | Method for controlling a charging current limit value for a battery management system, and battery management system | |
| KR20130140647A (en) | Method for predicting the electrical power an electrochemical energyy store can output to a consumer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |