CN115195537A - Battery heating method and device and vehicle - Google Patents

Battery heating method and device and vehicle Download PDF

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Publication number
CN115195537A
CN115195537A CN202110390995.7A CN202110390995A CN115195537A CN 115195537 A CN115195537 A CN 115195537A CN 202110390995 A CN202110390995 A CN 202110390995A CN 115195537 A CN115195537 A CN 115195537A
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CN
China
Prior art keywords
fuel cell
power
temperature
vehicle
cell
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Pending
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CN202110390995.7A
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Chinese (zh)
Inventor
王超
魏长河
宋祎博
邓新华
高武
李丹
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Priority to CN202110390995.7A priority Critical patent/CN115195537A/en
Publication of CN115195537A publication Critical patent/CN115195537A/en
Pending legal-status Critical Current

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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
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • 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
    • 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
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/31—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for starting of fuel cells
    • 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
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

The present disclosure relates to a battery heating method, device and vehicle, comprising: after the vehicle is started, if the temperature of the fuel cell is smaller than or equal to a first temperature threshold, reducing the concentration of oxygen input into the fuel cell to reduce the voltage of the fuel cell and increase the entropy heat generated by the fuel cell, and if the temperature of the fuel cell is larger than the first temperature threshold and the temperature of the power cell is smaller than or equal to a second temperature threshold, controlling the fuel cell to supply power to a heating sheet included in the power cell so that the heating sheet heats the power cell, and if the temperature of the fuel cell is larger than the first temperature threshold and the temperature of the power cell is larger than the second temperature threshold, controlling the fuel cell and the power cell to supply power to a driving module. The fuel cell is rapidly heated and started by reducing the oxygen concentration, and the fuel cell after being started supplies power to the heating sheet to heat the power cell, so that the normal work of the power cell is ensured.

Description

Battery heating method and device and vehicle
Technical Field
The disclosure relates to the technical field of new energy automobiles, in particular to a battery heating method, a battery heating device and a vehicle.
Background
Under the condition of paying attention to sustainable development, the green and environment-friendly fuel cell electric automobile is widely applied. The power battery and the fuel battery are used as a power source and an energy storage unit for the operation of the fuel battery electric automobile, and the performance of the power battery and the fuel battery directly influences the performance of the whole automobile. The charging and discharging efficiency of the power battery in a low-temperature environment is low, and the power battery needs to be preheated before the vehicle runs and heated to a proper working temperature range. However, the power required for heating the power battery is large, and the power battery cannot provide the power. Meanwhile, in a low-temperature environment of the fuel cell, reaction products of the fuel cell can be frozen due to low temperature, so that the performance of the fuel cell is reduced, and the fuel cell is difficult to start normally.
Disclosure of Invention
In order to solve the problems in the related art, the present disclosure provides a battery heating method, apparatus, and vehicle.
In order to achieve the above object, according to a first aspect of an embodiment of the present disclosure, there is provided a battery heating method applied to a vehicle including: the system comprises a fuel cell, a power cell, a voltage conversion module and a driving module, wherein the voltage conversion module is respectively connected with the fuel cell, the power cell and the driving module, and the driving module is used for driving a motor of the vehicle; the method comprises the following steps:
detecting the temperature of the fuel cell after the vehicle is started, and reducing the concentration of oxygen input to the fuel cell to reduce the voltage of the fuel cell to increase the entropy heat generated by the fuel cell if the temperature of the fuel cell is less than or equal to a first temperature threshold, the temperature of the fuel cell increasing if the entropy heat increases;
when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, controlling the fuel cell to supply power to a heating sheet included in the power cell through the voltage conversion module so that the heating sheet heats the power cell;
and under the condition that the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power battery is greater than the second temperature threshold, controlling the fuel cell and the power battery to supply power to the driving module through the voltage conversion module.
Optionally, the reducing the concentration of oxygen input to the fuel cell comprises:
inputting gas discharged from a gas outlet of a cathode of the fuel cell to a gas inlet of the cathode to reduce an oxygen concentration input to the fuel cell;
and stopping the gas discharged from the gas outlet of the cathode and inputting the gas to the gas inlet of the cathode when the temperature of the fuel cell is greater than the first temperature threshold.
Optionally, the method further comprises:
and controlling the fuel cell to stop supplying power to the heating plate through the voltage conversion module under the condition that the temperature of the fuel cell is greater than the first temperature threshold value and the temperature of the power cell is greater than the second temperature threshold value.
Optionally, the vehicle further includes an in-vehicle heater, the in-vehicle heater is connected to the voltage conversion module, and the in-vehicle heater is disposed inside the vehicle; the method further comprises the following steps:
and when the temperature of the fuel cell is greater than the first temperature threshold value, controlling the fuel cell to supply power to the in-vehicle heater through the voltage conversion module so that the in-vehicle heater heats the interior of the vehicle.
Optionally, the vehicle further comprises a battery heater disposed within a specified distance range of the fuel cell, the method further comprising:
and under the condition that the vehicle is stopped, controlling the power battery to supply power to the battery heater through the voltage conversion module according to preset power so as to keep the temperature of the fuel battery within a specified temperature range.
Optionally, the controlling the fuel cell and the power cell to supply power to the driving module through the voltage conversion module includes:
if the vehicle is in a running state, determining a first power corresponding to the fuel cell and a second power corresponding to the power cell according to the power demand of the motor and a preset power distribution rule;
and controlling the fuel cell to supply power to the driving module according to the first power, and controlling the power cell to supply power to the driving module according to the second power.
According to a second aspect of the embodiments of the present disclosure, there is provided a battery heating apparatus applied to a vehicle including: the system comprises a fuel cell, a power cell, a voltage conversion module and a driving module, wherein the voltage conversion module is respectively connected with the fuel cell, the power cell and the driving module, and the driving module is used for driving a motor of the vehicle; the device comprises:
a processing module, configured to detect a temperature of the fuel cell after the vehicle is started, and reduce an oxygen concentration input to the fuel cell to reduce a voltage of the fuel cell to increase entropy heat generated by the fuel cell if the temperature of the fuel cell is less than or equal to a first temperature threshold, wherein the temperature of the fuel cell increases if the entropy heat increases;
the control module is used for controlling the fuel cell to supply power to a heating sheet included by the power cell through the voltage conversion module under the condition that the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, so that the heating sheet heats the power cell;
the control module is further used for controlling the fuel cell and the power battery to supply power to the driving module through the voltage conversion module under the condition that the temperature of the fuel cell is greater than the first temperature threshold value and the temperature of the power battery is greater than the second temperature threshold value.
Optionally, the processing module is configured to:
inputting gas discharged from a gas outlet of a cathode of the fuel cell to a gas inlet of the cathode to reduce an oxygen concentration input to the fuel cell;
and stopping the gas discharged from the gas outlet of the cathode and inputting the gas to the gas inlet of the cathode when the temperature of the fuel cell is greater than the first temperature threshold.
Optionally, the control module is further configured to control the fuel cell to stop supplying power to the heating plate through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold.
Optionally, the vehicle further includes an in-vehicle heater, the in-vehicle heater is connected to the voltage conversion module, and the in-vehicle heater is disposed inside the vehicle;
the control module is further configured to control the fuel cell to supply power to the in-vehicle heater through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold, so that the in-vehicle heater heats the interior of the vehicle.
Optionally, the vehicle further comprises a battery heater disposed within a specified distance range of the fuel cell;
the control module is further used for controlling the power battery to supply power to the battery heater through the voltage conversion module according to preset power under the condition that the vehicle stops so as to keep the temperature of the fuel battery within a specified temperature range.
Optionally, the controlling the fuel cell and the power cell to supply power to the driving module through the voltage conversion module includes:
if the vehicle is in a running state, determining a first power corresponding to the fuel cell and a second power corresponding to the power cell according to the power demand of the motor and a preset power distribution rule;
and controlling the fuel cell to supply power to the driving module according to the first power, and controlling the power cell to supply power to the driving module according to the second power.
According to a third aspect of the embodiments of the present disclosure, there is provided a vehicle including a fuel cell, a power cell, a voltage conversion module, a drive module, and the battery heating apparatus of the second aspect.
Through the technical scheme, the temperature of the fuel cell is detected after the vehicle is started, the oxygen concentration input to the fuel cell is reduced when the temperature of the fuel cell is smaller than or equal to a first temperature threshold value, so that the voltage of the fuel cell is reduced, and the entropy heat generated by the fuel cell is increased, wherein the temperature of the fuel cell is increased when the entropy heat is increased, then the fuel cell is controlled to supply power to the heating plate included in the power cell through the voltage conversion module when the temperature of the fuel cell is larger than the first temperature threshold value and the temperature of the power cell is smaller than or equal to a second temperature threshold value, so that the power cell is heated by the heating plate, and then the fuel cell and the power cell are controlled to supply power to the driving module through the voltage conversion module when the temperature of the fuel cell is larger than the first temperature threshold value and the temperature of the power cell is larger than the second temperature threshold value. According to the fuel cell system, the oxygen concentration input to the fuel cell can be reduced, the fuel cell can be rapidly heated and started, and the fuel cell after being started supplies power to the heating sheet to heat the power cell, so that the normal work of the power cell is ensured.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a method of heating a battery according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating a method of heating a battery according to an exemplary embodiment;
FIG. 3 is a flow chart illustrating another method of battery heating according to an exemplary embodiment;
FIG. 4 is a schematic diagram illustrating another method of heating a battery according to an exemplary embodiment;
FIG. 5 is a flow chart illustrating yet another method of battery heating in accordance with an exemplary embodiment;
FIG. 6 is a schematic diagram illustrating yet another method of battery heating according to an exemplary embodiment;
FIG. 7 is a flow chart of one step 103 shown in the embodiment of FIG. 1;
FIG. 8 is a block diagram illustrating a battery heating apparatus according to an exemplary embodiment;
FIG. 9 is a block diagram of a vehicle shown in accordance with an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Before introducing the battery heating method, the battery heating device and the vehicle provided by the present disclosure, an application scenario related to various embodiments of the present disclosure is first introduced. The application scenario may include a vehicle provided with a fuel cell, such as a hydrogen fuel cell, and a power cell, such as a lithium power cell, the vehicle may be a new energy vehicle (e.g., a fuel cell electric vehicle), or may be another type of vehicle or non-vehicle. The fuel cell and the power cell can respectively supply power to the driving module through the voltage conversion module, so that the driving module drives a motor of the vehicle to work, and normal running of the vehicle is ensured. The voltage conversion module is used for converting high voltage output by the fuel cell and the power cell into low voltage, and the voltage conversion module can comprise a bidirectional DC/DC converter and a whole vehicle all-in-one device, wherein the whole vehicle all-in-one device is used for integrating electric energy output by the fuel cell and the power cell and providing the electric energy to corresponding electric equipment.
FIG. 1 is a flow chart illustrating a method of heating a battery according to an exemplary embodiment. As shown in fig. 1, applied to a vehicle including: the system comprises a fuel cell, a power cell, a voltage conversion module and a driving module, wherein the voltage conversion module is respectively connected with the fuel cell, the power cell and the driving module, and the driving module is used for driving a motor of a vehicle. The method may comprise the steps of:
and step 101, after the vehicle is started, detecting the temperature of the fuel cell, and reducing the concentration of oxygen input to the fuel cell to reduce the voltage of the fuel cell to increase the entropy heat generated by the fuel cell when the temperature of the fuel cell is less than or equal to a first temperature threshold value, wherein the temperature of the fuel cell is increased when the entropy heat is increased.
For example, when the external environment temperature is low, in order to ensure the normal start-up of the fuel cell, an EGR (Exhaust Gas recirculation) technique may be used to rapidly warm the fuel cell to a normal operating region. Specifically, first, the temperature of the fuel cell may be detected by a temperature sensor provided on the fuel cell after the vehicle is started. If the temperature of the fuel cell is less than or equal to the first temperature threshold (the first temperature threshold may be 70 ℃, for example), the gas discharged from the gas outlet of the cathode of the fuel cell may be input to the gas inlet of the cathode to reduce the concentration of the oxygen input to the fuel cell. After the concentration of oxygen input to the fuel cell is reduced, the voltage of the fuel cell is reduced, while the power of the fuel cell is kept unchanged, and at the moment, the current of the fuel cell is increased, so that the fuel cell can generate more entropy heat, and meanwhile, the temperature of the fuel cell can be gradually increased along with the increase of the entropy heat. By reducing the concentration of oxygen input to the fuel cell, the temperature of the fuel cell can be quickly raised to the first temperature threshold, so that the fuel cell quickly enters a normal working state, and the difficulty of starting the fuel cell is reduced. And then, in the case that the temperature of the fuel cell is greater than the first temperature threshold value, the gas discharged from the gas outlet of the cathode is stopped being input to the gas inlet of the cathode, so that the temperature of the fuel cell is prevented from being too high, and the safety and the service life of the fuel cell are prevented from being affected.
And 102, controlling the fuel cell to supply power to a heating sheet included in the power cell through the voltage conversion module under the condition that the temperature of the fuel cell is greater than a first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, so that the heating sheet heats the power cell.
For example, in order to ensure that the power battery can be normally charged and discharged at a low temperature, the temperature of the power battery can be increased by supplying power from the fuel cell to a heating plate included in the power battery. For example, the voltage conversion module may be connected to a heating plate included in the power battery, as shown in fig. 2. After the temperature of the fuel cell is greater than the first temperature threshold (i.e., after the fuel cell is normally started, the fuel cell is in a normal operating state at this time, and can output high power), the temperature of the power cell may be detected first. If the temperature of the power battery is greater than the second temperature threshold (the second temperature threshold may be 30 ℃), which indicates that the temperature of the power battery is normal and the power battery does not need to be heated.
If the temperature of the power battery is less than or equal to the second temperature threshold, it is indicated that the temperature of the power battery is low at this time, the power battery cannot be charged and discharged normally, and the switch K1 can be controlled to be closed, so that the fuel battery can supply power to the heating plate included in the power battery through the voltage conversion module, so that the heating plate heats the power battery to raise the temperature of the power battery, and the temperature of the power battery is quickly raised to the second temperature threshold, so that the power battery enters a normal working state quickly. Furthermore, under the condition that the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold, the fuel cell can be controlled to stop supplying power to the heating sheet through the voltage conversion module, so that the problem that the safety and the service life of the power cell are affected due to overhigh temperature of the power cell is avoided. The power battery can be heated by adopting a mode that the fuel battery supplies power to the heating sheet included by the power battery without providing power required by heating by the power battery.
And 103, controlling the fuel cell and the power cell to supply power to the driving module through the voltage conversion module under the condition that the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold.
For example, if the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold, the fuel cell and the power cell both enter a normal working state, the fuel cell and the power cell can be controlled to output electric quantities of different powers respectively according to the power requirement of the motor, and the power is supplied to the driving module through the voltage conversion module. For example, as shown in fig. 2, the switch K2 may be controlled to be closed, so that the fuel cell and the power cell supply power to the driving module through the voltage conversion module.
It should be noted that, the above control over the fuel cell and the power cell may be performed by a single controller, or may be performed by a plurality of controllers in cooperation, and the disclosure is not limited in particular. For example, the Control of the fuel cell and the power cell may be realized by a VCU (Vehicle Control Unit, chinese) of the Vehicle through a fuel cell controller controlling the fuel cell and a power cell controller controlling the power cell.
In summary, the present disclosure reduces the voltage of the fuel cell by detecting the temperature of the fuel cell after the vehicle is started, and reduces the oxygen concentration input to the fuel cell to increase the entropy heat generated by the fuel cell when the temperature of the fuel cell is less than or equal to a first temperature threshold, wherein the temperature of the fuel cell is increased when the entropy heat is increased, and then controls the fuel cell to supply power to the heating plate included in the power cell through the voltage conversion module to heat the power cell when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, and then controls the fuel cell and the power cell to supply power to the driving module through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold. The fuel cell power supply system can realize rapid temperature rise and starting of the fuel cell by reducing the concentration of oxygen input into the fuel cell, and supply power to the heating sheet through the started fuel cell so as to heat the power cell, thereby ensuring the normal work of the power cell.
FIG. 3 is a flow chart illustrating another method of battery heating according to an exemplary embodiment. As shown in fig. 3, the vehicle further includes an in-vehicle heater connected to the voltage conversion module, the in-vehicle heater being disposed inside the vehicle. The method may further comprise the steps of:
and 104, controlling the fuel cell to supply power to the in-vehicle heater through the voltage conversion module so that the in-vehicle heater heats the interior of the vehicle when the temperature of the fuel cell is greater than the first temperature threshold.
In one scenario, when the external environment temperature is low, the temperature inside the vehicle may also be low, an in-vehicle heater may be disposed inside the vehicle, and the voltage conversion module may be connected to the in-vehicle heater, as shown in fig. 4. Under the condition that the temperature of the fuel cell is greater than the first temperature threshold value, the switch K3 can be controlled to be closed, so that the fuel cell can supply power to the in-vehicle heater through the voltage conversion module to heat the inside of the vehicle through the in-vehicle heater, the temperature of the inside of the vehicle is improved, and the comfort of the whole vehicle is further improved.
FIG. 5 is a flow chart illustrating yet another method of battery heating according to an exemplary embodiment. As shown in fig. 5, the vehicle further includes a battery heater provided within a specified distance range of the fuel cell. The method may further comprise the steps of:
and 105, controlling the power battery to supply power to the battery heater through the voltage conversion module according to preset power under the condition that the vehicle stops so as to keep the temperature of the fuel cell within a specified temperature range.
In another scenario, due to poor thermal insulation of the fuel cell and the power cell, when the vehicle is left for a long time in a low temperature environment, the temperatures of the fuel cell and the power cell may drop to a lower temperature, which may cause a problem of difficulty in starting when the fuel cell and the power cell are restarted. It is possible to dispose the cell heater within a specified distance range of the fuel cell and connect the voltage conversion module with the in-vehicle heater as shown in fig. 6. After the vehicle stops, the switch K4 can be controlled to be closed, so that the power battery can be controlled to output according to the preset power (the power value of the preset power is smaller) at random, and the power is supplied to the battery heater through the voltage conversion module, so that the temperature of the fuel battery is kept within a specified temperature range, and the temperature of the fuel battery is prevented from being reduced too low. Meanwhile, when the power battery outputs according to the preset power, the power battery can also generate certain heat, so that the over-low temperature drop of the power battery is avoided.
Fig. 7 is a flowchart of one step 103 shown in the embodiment of fig. 1. As shown in fig. 7, step 103 may include the steps of:
and step 1031, if the vehicle is in a running state, determining a first power corresponding to the fuel cell and a second power corresponding to the power cell according to the power demand of the motor and a preset power distribution rule.
And step 1032, controlling the fuel cell to supply power to the driving module according to the first power, and controlling the power cell to supply power to the driving module according to the second power.
For example, if the vehicle is in a driving state, the power demand of the motor may be determined according to the working condition of the entire vehicle, and the first power required to be output by the fuel cell and the second power required to be output by the power cell may be determined according to the power demand of the motor and a preset power distribution rule. For example, when the power demand of the motor is 100kw, it may be determined that the first power corresponding to the fuel cell is 50kw and the second power corresponding to the power cell is 50kw according to the power distribution rule. And then controlling the fuel cell to supply power to the driving module through the voltage conversion module according to the first power, and controlling the power cell to supply power to the driving module through the voltage conversion module according to the second power.
In summary, the present disclosure reduces the voltage of the fuel cell by detecting the temperature of the fuel cell after the vehicle is started, and reduces the oxygen concentration input to the fuel cell to increase the entropy heat generated by the fuel cell when the temperature of the fuel cell is less than or equal to a first temperature threshold, wherein the temperature of the fuel cell is increased when the entropy heat is increased, and then controls the fuel cell to supply power to the heating plate included in the power cell through the voltage conversion module to heat the power cell when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, and then controls the fuel cell and the power cell to supply power to the driving module through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold. According to the fuel cell system, the oxygen concentration input to the fuel cell can be reduced, the fuel cell can be rapidly heated and started, and the fuel cell after being started supplies power to the heating sheet to heat the power cell, so that the normal work of the power cell is ensured.
FIG. 8 is a block diagram illustrating a battery heating apparatus according to an exemplary embodiment. As shown in fig. 8, applied to a vehicle, the vehicle includes: the system comprises a fuel cell, a power cell, a voltage conversion module and a driving module, wherein the voltage conversion module is respectively connected with the fuel cell, the power cell and the driving module, and the driving module is used for driving a motor of a vehicle. The apparatus 200 comprises:
the processing module 201 is used for detecting the temperature of the fuel cell after the vehicle is started, and reducing the concentration of oxygen input to the fuel cell to reduce the voltage of the fuel cell to increase the entropy heat generated by the fuel cell when the temperature of the fuel cell is less than or equal to a first temperature threshold value, wherein the temperature of the fuel cell is increased when the entropy heat is increased.
And the control module 202 is used for controlling the fuel cell to supply power to a heating sheet included in the power cell through the voltage conversion module so that the heating sheet heats the power cell under the condition that the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to the second temperature threshold.
The control module 202 is further configured to control the fuel cell and the power cell to supply power to the driving module through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold.
Optionally, the processing module 201 is configured to:
gas discharged from the gas outlet of the cathode of the fuel cell is input to the gas inlet of the cathode to reduce the concentration of oxygen input to the fuel cell.
When the temperature of the fuel cell is higher than the first temperature threshold value, the gas discharged from the gas outlet of the cathode is stopped and input to the gas inlet of the cathode.
Optionally, the control module 202 is further configured to control the fuel cell to stop supplying power to the heating plate through the voltage conversion module if the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold.
Optionally, the vehicle further includes an in-vehicle heater, the in-vehicle heater is connected to the voltage conversion module, and the in-vehicle heater is disposed inside the vehicle.
The control module 202 is further configured to control the fuel cell to supply power to the in-vehicle heater through the voltage conversion module so that the in-vehicle heater heats the interior of the vehicle when the temperature of the fuel cell is greater than the first temperature threshold.
Optionally, the vehicle further includes a battery heater disposed within a specified distance range of the fuel cell.
The control module 202 is further configured to control the power battery to supply power to the battery heater through the voltage conversion module according to a preset power when the vehicle is stopped, so as to maintain the temperature of the fuel cell within a specified temperature range.
Optionally, the control module 202 is configured to:
and if the vehicle is in a running state, determining a first power corresponding to the fuel cell and a second power corresponding to the power cell according to the power requirement of the motor and a preset power distribution rule.
And controlling the fuel cell to supply power to the driving module according to the first power, and controlling the power cell to supply power to the driving module according to the second power.
With regard to the apparatus in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.
In summary, the present disclosure reduces the voltage of the fuel cell by detecting the temperature of the fuel cell after the vehicle is started, and reduces the oxygen concentration input to the fuel cell to increase the entropy heat generated by the fuel cell when the temperature of the fuel cell is less than or equal to a first temperature threshold, wherein the temperature of the fuel cell is increased when the entropy heat is increased, and then controls the fuel cell to supply power to the heating plate included in the power cell through the voltage conversion module to heat the power cell when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, and then controls the fuel cell and the power cell to supply power to the driving module through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold. According to the fuel cell system, the oxygen concentration input to the fuel cell can be reduced, the fuel cell can be rapidly heated and started, and the fuel cell after being started supplies power to the heating sheet to heat the power cell, so that the normal work of the power cell is ensured.
The present disclosure also relates to a vehicle, as shown in fig. 9, the vehicle 300 includes a fuel cell 301, a power cell 302, a voltage conversion module 303, a driving module 304, and any one of the above battery heating apparatuses 200.
With regard to the vehicle 300 in the above-described embodiment, the specific manner in which the battery heating apparatus 200 performs the operation has been described in detail in the embodiment relating to the battery heating method, and will not be elaborated here.
In summary, the present disclosure reduces the voltage of the fuel cell by detecting the temperature of the fuel cell after the vehicle is started, and reduces the oxygen concentration input to the fuel cell to increase the entropy heat generated by the fuel cell when the temperature of the fuel cell is less than or equal to a first temperature threshold, wherein the temperature of the fuel cell is increased when the entropy heat is increased, and then controls the fuel cell to supply power to the heating plate included in the power cell through the voltage conversion module to heat the power cell when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, and then controls the fuel cell and the power cell to supply power to the driving module through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is greater than the second temperature threshold. The fuel cell power supply system can realize rapid temperature rise and starting of the fuel cell by reducing the concentration of oxygen input into the fuel cell, and supply power to the heating sheet through the started fuel cell so as to heat the power cell, thereby ensuring the normal work of the power cell.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.

Claims (10)

1. A battery heating method applied to a vehicle, the vehicle comprising: the system comprises a fuel cell, a power cell, a voltage conversion module and a driving module, wherein the voltage conversion module is respectively connected with the fuel cell, the power cell and the driving module, and the driving module is used for driving a motor of the vehicle; the method comprises the following steps:
detecting the temperature of the fuel cell after the vehicle is started, and reducing the concentration of oxygen input to the fuel cell to reduce the voltage of the fuel cell to increase the entropy heat generated by the fuel cell if the temperature of the fuel cell is less than or equal to a first temperature threshold, the temperature of the fuel cell increasing if the entropy heat increases;
when the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold, controlling the fuel cell to supply power to a heating sheet included in the power cell through the voltage conversion module so that the heating sheet heats the power cell;
and under the condition that the temperature of the fuel cell is greater than the first temperature threshold value and the temperature of the power battery is greater than the second temperature threshold value, controlling the fuel cell and the power battery to supply power to the driving module through the voltage conversion module.
2. The method of claim 1, wherein said reducing the concentration of oxygen input to the fuel cell comprises:
inputting gas discharged from a gas outlet of a cathode of the fuel cell to a gas inlet of the cathode to reduce an oxygen concentration input to the fuel cell;
and stopping gas discharged from the gas outlet of the cathode from being input to the gas inlet of the cathode when the temperature of the fuel cell is greater than the first temperature threshold.
3. The method of claim 1, further comprising:
and under the condition that the temperature of the fuel cell is greater than the first temperature threshold value and the temperature of the power battery is greater than the second temperature threshold value, controlling the fuel cell to stop supplying power to the heating plate through the voltage conversion module.
4. The method of claim 1, wherein the vehicle further comprises an in-vehicle heater connected to the voltage conversion module, the in-vehicle heater being disposed in an interior of the vehicle; the method further comprises the following steps:
and when the temperature of the fuel cell is greater than the first temperature threshold value, controlling the fuel cell to supply power to the in-vehicle heater through the voltage conversion module so that the in-vehicle heater heats the interior of the vehicle.
5. The method of claim 1, wherein the vehicle further comprises a battery heater disposed within a specified distance range of the fuel cell, the method further comprising:
and under the condition that the vehicle is stopped, controlling the power battery to supply power to the battery heater through the voltage conversion module according to preset power so as to keep the temperature of the fuel battery within a specified temperature range.
6. The method of claim 1, wherein the controlling the fuel cell and the power cell to supply power to the drive module through the voltage conversion module comprises:
if the vehicle is in a running state, determining first power corresponding to the fuel cell and second power corresponding to the power cell according to the power requirement of the motor and a preset power distribution rule;
and controlling the fuel cell to supply power to the driving module according to the first power, and controlling the power cell to supply power to the driving module according to the second power.
7. A battery heating apparatus, applied to a vehicle, the vehicle comprising: the system comprises a fuel cell, a power cell, a voltage conversion module and a driving module, wherein the voltage conversion module is respectively connected with the fuel cell, the power cell and the driving module, and the driving module is used for driving a motor of the vehicle; the device comprises:
a processing module, configured to detect a temperature of the fuel cell after the vehicle is started, and reduce an oxygen concentration input to the fuel cell to reduce a voltage of the fuel cell to increase entropy heat generated by the fuel cell if the temperature of the fuel cell is less than or equal to a first temperature threshold, wherein the temperature of the fuel cell increases if the entropy heat increases;
the control module is used for controlling the fuel cell to supply power to a heating sheet included by the power cell through the voltage conversion module so that the heating sheet heats the power cell under the condition that the temperature of the fuel cell is greater than the first temperature threshold and the temperature of the power cell is less than or equal to a second temperature threshold;
the control module is further used for controlling the fuel cell and the power cell to supply power to the driving module through the voltage conversion module under the condition that the temperature of the fuel cell is greater than the first temperature threshold value and the temperature of the power cell is greater than the second temperature threshold value.
8. The apparatus of claim 7, wherein the vehicle further comprises an in-vehicle heater connected to the voltage conversion module, the in-vehicle heater being disposed inside the vehicle;
the control module is further configured to control the fuel cell to supply power to the in-vehicle heater through the voltage conversion module when the temperature of the fuel cell is greater than the first temperature threshold, so that the in-vehicle heater heats the interior of the vehicle.
9. The apparatus of claim 7, wherein the vehicle further comprises a battery heater disposed within a specified distance range of the fuel cell;
the control module is further used for controlling the power battery to supply power to the battery heater through the voltage conversion module according to preset power under the condition that the vehicle stops so as to keep the temperature of the fuel battery within a specified temperature range.
10. A vehicle characterized by comprising a fuel cell, a power cell, a voltage conversion module, a drive module, and the battery heating apparatus of any one of claims 7 to 9.
CN202110390995.7A 2021-04-12 2021-04-12 Battery heating method and device and vehicle Pending CN115195537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110390995.7A CN115195537A (en) 2021-04-12 2021-04-12 Battery heating method and device and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110390995.7A CN115195537A (en) 2021-04-12 2021-04-12 Battery heating method and device and vehicle

Publications (1)

Publication Number Publication Date
CN115195537A true CN115195537A (en) 2022-10-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110390995.7A Pending CN115195537A (en) 2021-04-12 2021-04-12 Battery heating method and device and vehicle

Country Status (1)

Country Link
CN (1) CN115195537A (en)

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