CN108528234B - Fuel cell protection system and charging method thereof - Google Patents
Fuel cell protection system and charging method thereof Download PDFInfo
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- CN108528234B CN108528234B CN201810170977.6A CN201810170977A CN108528234B CN 108528234 B CN108528234 B CN 108528234B CN 201810170977 A CN201810170977 A CN 201810170977A CN 108528234 B CN108528234 B CN 108528234B
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- 239000000446 fuel Substances 0.000 title claims abstract description 252
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 222
- 239000012528 membrane Substances 0.000 claims abstract description 111
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 230000001172 regenerating effect Effects 0.000 claims abstract description 32
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- 230000005611 electricity Effects 0.000 claims description 6
- 239000002253 acid Substances 0.000 description 33
- 230000002035 prolonged effect Effects 0.000 description 9
- 238000005485 electric heating Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and 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
- B60L58/10—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
- B60L58/30—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The embodiment of the invention discloses a fuel cell protection system and a charging method thereof, wherein the fuel cell protection system comprises: the temperature control switch is used for switching on the heating battery to be connected with the heating module if the current temperature of the fuel cell protection system is smaller than a first threshold value, the heating module is used for obtaining electric energy to heat the fuel cell protection system, the regenerative braking module is used for charging the heating battery by utilizing the generated electric energy when the electric energy is generated, the electric quantity detection module is used for detecting the residual electric quantity of the heating battery, the control module is used for obtaining the residual electric quantity of the heating battery, judging whether the residual electric quantity of the heating battery is smaller than a second threshold value or not, and if so, controlling at least one group of proton exchange membrane fuel cells to charge the heating battery. By adopting the embodiment of the invention, the cruising ability of the heating battery can be improved, thereby ensuring that the proton exchange membrane fuel battery is not damaged in a low-temperature environment and prolonging the service life of the proton exchange membrane fuel battery.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a fuel cell protection system and a charging method thereof.
Background
With the development of electronic technology, new energy automobiles gradually become the mainstream of the automobile market. As a new green power source, a fuel cell engine is becoming a major research focus for vehicle-mounted engines due to its many advantages, such as high efficiency and low emission. In fuel cell vehicle applications, the state of the fuel cell can be effectively monitored by keeping the controller of the fuel cell powered by a 24 volt (V) power supply.
At present, a proton exchange membrane fuel cell is basically adopted by a hydrogen energy automobile, a large amount of water can be generated in the working process of the proton exchange membrane fuel cell, when the temperature in the fuel cell is lower than 0 ℃ (centigrade), the water in air humidification is easy to freeze and damage the proton exchange membrane, and even the proton exchange membrane is punctured, so that the fuel cell is scrapped. Therefore, the existing fuel cell protection system is mainly: and the 24V heating battery is used for carrying out heat preservation and heating on the fuel battery system. However, when the heating power is high or the heating time is long, the electric energy of the 24V heating battery is quickly exhausted, and how to ensure the endurance of the 24V heating battery, thereby ensuring that the proton exchange membrane fuel cell is not damaged in a low-temperature environment, which becomes a problem to be solved by the current fuel cell protection system.
Disclosure of Invention
The embodiment of the invention provides a fuel cell protection system and a charging method thereof, which can improve the endurance of a heating cell, thereby ensuring that a proton exchange membrane fuel cell is not damaged in a low-temperature environment (lower than 0 ℃) and prolonging the service life of the proton exchange membrane fuel cell.
In a first aspect, an embodiment of the present invention provides a fuel cell protection system, where the fuel cell protection system includes at least one group of proton exchange membrane fuel cells, and further includes a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module, and a regenerative braking module, where:
the temperature control switch is used for switching on the connection between the heating battery and the heating module if the current temperature of the fuel cell protection system is detected to be smaller than a first threshold value;
the heating module is used for acquiring electric energy from the heating battery to heat the fuel cell protection system;
the regenerative braking module is used for charging the heating battery by using the generated electric energy when the regenerative braking module generates the electric energy;
the electric quantity detection module is used for detecting the residual electric quantity of the heating battery;
the control module is used for acquiring the residual electric quantity of the heating battery from the electric quantity detection module;
the control module is further configured to determine whether the remaining power of the heating battery is less than a second threshold, and if so, control the at least one group of proton exchange membrane fuel cells to charge the heating battery.
In one possible design, the control module is specifically configured to:
and when the residual electric quantity of the heating battery is smaller than the second threshold value, detecting the number of the proton exchange membrane fuel batteries in the working state in the fuel battery protection system, and if the number of the proton exchange membrane fuel batteries in the working state is larger than a third threshold value, controlling any group of the proton exchange membrane fuel batteries in the working state to charge the heating battery.
In one possible design, the control module is further configured to:
and when the number of the proton exchange membrane fuel cells in the working state is less than or equal to the third threshold value, sending electric quantity prompt information containing the residual electric quantity of the heating cell to a target terminal corresponding to a user, wherein the electric quantity prompt information is used for prompting the user to charge the heating cell.
In one possible design, the fuel cell protection system further includes a DCDC converter;
the DCDC converter is used for converting high-voltage electricity generated by the proton exchange membrane fuel cell into low-voltage electricity with a fixed voltage value;
the control module is specifically configured to:
and when the residual capacity of the heating battery is smaller than the second threshold value, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery through the DCDC converter.
In one possible design, the regenerative braking module includes an electric machine, a traction converter, and a drive shaft;
the driving shaft is used for connecting a driving wheel and the motor;
when a braking signal generated by braking operation is detected, the input power supply of the motor is disconnected, the state of the motor is changed from a motor state to a generator state, mechanical energy on the driving wheels is transmitted to the motor through the driving shaft, the motor converts the mechanical energy on the driving shaft into alternating current, and the traction converter converts the alternating current generated on the motor into direct current to charge the heating battery.
In a second aspect, an embodiment of the present invention provides a charging method for a fuel cell protection system, where the fuel cell protection system includes at least one group of proton exchange membrane fuel cells, and further includes a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module, and a regenerative braking module, and the charging method for the fuel cell protection system includes:
if the current temperature of the fuel cell protection system is detected to be smaller than a first threshold value, connecting the heating cell with the heating module;
acquiring electric energy from the heating battery to heat the fuel cell protection system;
when the regenerative braking module generates electric energy, charging the heating battery with the generated electric energy;
detecting the residual electric quantity of the heating battery;
judging whether the residual electric quantity of the heating battery is smaller than a second threshold value or not;
and if so, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery.
In one possible design, if yes, controlling the at least one group of pem fuel cells to charge the heating battery includes:
if the residual electric quantity of the heating battery is smaller than the second threshold value, detecting the number of the proton exchange membrane fuel cells in the working state in the fuel cell protection system;
and if the number of the proton exchange membrane fuel cells in the working state is larger than a third threshold value, controlling any group of the proton exchange membrane fuel cells in the working state to charge the heating cell.
In one possible design, the method further includes:
and if the number of the proton exchange membrane fuel cells in the working state is less than or equal to the third threshold, sending electric quantity prompt information containing the residual electric quantity of the heating cell to a target terminal corresponding to a user, wherein the electric quantity prompt information is used for prompting the user to charge the heating cell.
In one possible design, the fuel cell protection system further includes a DCDC converter;
if yes, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery, and the method comprises the following steps:
and if the residual electric quantity of the heating battery is smaller than the second threshold value, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery through the DCDC converter.
In a third aspect, an embodiment of the present invention provides a program including program instructions that, when executed by a controller, cause the controller to execute the charging method of the fuel cell protection system described in the second aspect.
The fuel cell protection system of the embodiment of the invention comprises at least one group of proton exchange membrane fuel cells, and further comprises a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module and a regenerative braking module, wherein the temperature control switch is used for connecting the heating cell with the heating module if the current temperature of the fuel cell protection system is detected to be less than a first threshold value, the heating module is used for obtaining electric energy from the heating cell to heat the fuel cell protection system, the regenerative braking module is used for charging the heating cell by using the generated electric energy when the regenerative braking module generates the electric energy, the electric quantity detection module is used for detecting the residual electric quantity of the heating cell, the control module is used for obtaining the residual electric quantity of the heating cell from the electric quantity detection module and judging whether the residual electric quantity of the heating cell is less than a second threshold value or not, if so, the at least one group of proton exchange membrane fuel cells are controlled to charge the heating battery, and the heating battery is charged, so that the heating battery can continuously provide electric energy for the heating module, the cruising ability of the heating battery can be improved, the proton exchange membrane fuel cells are prevented from being damaged in a low-temperature environment (lower than 0 ℃) and the service life of the proton exchange membrane fuel cells is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fuel cell protection system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a fuel cell protection system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a charging method of a fuel cell protection system according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a charging method of another fuel cell protection system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
A fuel cell protection system and a charging method thereof according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 4.
Referring to fig. 1, which is a schematic structural diagram of a fuel cell protection system according to an embodiment of the present invention, as shown in fig. 1, the fuel cell protection system may include at least one group of proton exchange membrane fuel cells, and may further include a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module, and a regenerative braking module. One end of the temperature control switch is connected with one end of the heating module, and the other end of the temperature control switch is connected with one end of the heating battery; the other end of the heating module is connected with the other end of the heating battery; one end of the heating battery is also connected with one end of the proton exchange membrane fuel cell and the regenerative braking module respectively, and the other end of the heating battery is also connected with one end of the electric quantity detection module; the other end of the proton exchange membrane fuel cell is connected with one end of the control module; the other end of the control module is connected with the other end of the electric quantity detection module.
In the embodiment of the present invention, the temperature control switch may detect the current temperature of the fuel cell protection system, and determine whether the current temperature of the fuel cell protection system is less than a first threshold, for example, the first threshold is 5 ℃ (celsius), and if so, the temperature control switch may connect the heating battery to the heating module. The heating module can obtain electric energy from the heating battery and convert the obtained electric energy into heat energy to heat the fuel cell protection system. When the heating module heats the fuel cell protection system, the electric energy stored in the heating cell is consumed, so that the regenerative braking module connected with one end of the heating cell can charge the heating cell by using the generated electric energy when generating the electric energy. In addition, the electric quantity detection module may monitor the remaining electric quantity of the heating battery in real time, and report the monitored remaining electric quantity of the heating battery to the control module, and the control module may receive the remaining electric quantity of the heating battery reported by the electric quantity detection module, and determine whether the remaining electric quantity of the heating battery is smaller than a second threshold, for example, the second threshold is 20% of the total electric capacity of the heating battery, and if so, the control module may control the at least one group of pem fuel cells to charge the heating battery. The heating battery is charged through the regenerative braking module and the proton exchange membrane fuel cell, and the cruising ability of the heating battery can be improved, so that the proton exchange membrane fuel cell can be ensured not to be damaged in a low-temperature environment (lower than 0 ℃) and the service life of the proton exchange membrane fuel cell is prolonged.
Referring to fig. 2, a schematic diagram of a fuel cell protection system according to an embodiment of the present invention is shown.
It should be noted that the heating battery in the fuel cell protection system may be a 24V lead-acid battery, and may also be other types of storage batteries such as a lithium ion battery; the heating module may be a patch-shaped Positive Temperature Coefficient thermistor (PTC thermistor for short), or may be a common heating resistor or an electric heating element such as an electric heating coil, an electric heating rod, an electric heating wire, or the like; the electric quantity detection module can be an electric quantity detection chip BQ27510 and the like; the regenerative braking module RB may include a drive shaft, a motor, and a traction converter; the fuel cell protection system may further include a DCDC converter.
In the embodiment of the invention, the fuel cell protection system can comprise at least one group of proton exchange membrane fuel cells, and can also comprise a temperature control switch K1, a 24V lead-acid battery, a PTC thermistor, a controller, a power detection chip BQ27510, a DCDC converter, a driving shaft, a motor and a traction converter. One end of a temperature control switch K1 is connected with one end of the PTC thermistor, and the other end of the temperature control switch K1 can be connected with one end of a 24V lead-acid battery; the other end of the PTC thermistor is connected with the other end of the 24V lead-acid battery; one end of the 24V lead-acid battery is also connected with one end of the traction converter and one end of the DCDC converter respectively, and the other end of the 24V lead-acid battery is also connected with one end of the electric quantity detection chip BQ 27510; the other end of the traction converter is connected with one end of the motor; the other end of the motor is connected with one end of the driving shaft; the other end of the driving shaft is connected with the driving wheel; the other end of the DCDC converter is connected with one end of the proton exchange membrane fuel cell; the other end of the proton exchange membrane fuel cell is connected with one end of the controller; the other end of the controller is connected with the other end of the electric quantity detection chip BQ 27510.
In the embodiment of the present invention, the temperature control switch K1 may monitor the current temperature of the fuel cell protection system in real time, and determine whether the current temperature of the fuel cell protection system is less than a first threshold, for example, the first threshold may be 5 ℃, and if so, the temperature control switch K1 is closed, so as to connect the loop of the 24V lead-acid battery and the PTC thermistor. The PTC thermistor obtains electric energy from the 24V lead-acid battery, and converts the obtained electric energy into heat energy to heat the fuel cell protection system. Since the PTC thermistor consumes the electric energy stored in the 24V lead-acid battery when heating the fuel cell protection system, the 24V lead-acid battery is charged with the electric energy generated by the regenerative braking module RB when the regenerative braking module RB generates the electric energy. When a braking signal generated by a user when stepping on a brake or parking beside is detected, an input power supply of the motor is cut off, the driving wheel performs deceleration movement due to inertia effect at the moment, the driving wheel is transmitted to the motor through a driving shaft connected with the driving wheel to drive a rotor of the motor to rotate, the motor is changed from a motor to an asynchronous generator at the moment, mechanical energy on the driving shaft is converted into electric energy, the electric energy converted from the mechanical energy is alternating current, and a traction converter converts the alternating current generated on the motor into direct current to charge a 24V lead-acid battery. In addition, the electric quantity detection chip BQ27510 monitors the residual electric quantity of the 24V lead-acid battery in real time, and reports the monitored residual electric quantity of the 24V lead-acid battery to the controller, the controller receives the residual electric quantity of the 24V lead-acid battery reported by the electric quantity detection chip BQ27510, and judges whether the residual electric quantity of the 24V lead-acid battery is smaller than a second threshold value, for example, the second threshold value is 20% of the total electric capacity of the 24V lead-acid battery, if so, the controller controls at least one group of proton exchange membrane fuel cells to convert the high-voltage electricity generated by the proton exchange membrane fuel cells into the low-voltage electricity of 24V through the DCDC converter, and the 24V lead-acid battery is charged. The 24V lead-acid battery is charged through the regenerative braking module RB and the proton exchange membrane fuel cell, the endurance capacity of the 24V lead-acid battery can be improved, and therefore the proton exchange membrane fuel cell is not damaged in a low-temperature environment (lower than 0 ℃) and the service life of the proton exchange membrane fuel cell is prolonged.
In an optional embodiment, when the controller determines that the remaining capacity of the 24V lead-acid battery is less than the second threshold, the controller may detect the number of the pem fuel cells in the fuel cell protection system in the operating state, and determine whether the number of the pem fuel cells in the operating state is greater than a third threshold, if so, control any group of the pem fuel cells in the operating state to convert the high voltage generated by the pem fuel cells into the low voltage of 24V through the DCDC converter, and charge the 24V lead-acid battery. The third threshold may be a preset fixed value, or may be set according to the total number of the pem fuel cells in the fuel cell protection system, for example, the total number of the pem fuel cells in the fuel cell protection system is 6, and the third threshold may be half (i.e., 3) of the total number of the pem fuel cells. By detecting the number of the proton exchange membrane fuel cells in the working state in the fuel cell protection system, when the electric energy of the new energy automobile is sufficient, the 24V lead-acid battery can be charged by using the redundant electric energy of the proton exchange membrane fuel cells in the working state, so that the normal operation of the new energy automobile is ensured, the cruising ability of the 24V lead-acid battery is also ensured, the proton exchange membrane fuel cells are not damaged, and the service life of the proton exchange membrane fuel cells is prolonged.
In an alternative embodiment, the fuel cell protection system may further include a wireless network module, and one end of the controller is further connected to the wireless network module. The controller may be further configured to send, when it is determined that the number of the pem fuel cells in the operating state is less than or equal to the third threshold, power prompting information including the remaining power of the 24V lead-acid battery to a target terminal corresponding to the user through a Wireless network module, such as bluetooth, a Wireless Local Area Network (WLAN), and the like. The wireless network module can be integrated on the controller or exist independently of the controller. The target terminal corresponding to the user can be intelligent equipment such as a smart phone, a notebook computer, an intelligent watch and an IPAD. The power prompt message can be used for prompting a user to charge the 24V lead-acid battery. The wireless network module sends electric quantity prompt information to the target terminal to prompt a user to charge the 24V lead-acid battery, so that the problems that the 24V lead-acid battery is over-discharged under the condition that the proton exchange membrane fuel battery does not work for a long time, the heating efficiency of the PTC thermistor is low, the proton exchange membrane fuel battery cannot be heated and insulated, the proton exchange membrane fuel battery is damaged and the like can be effectively solved.
In the embodiment of the invention, when the controller judges that the residual electric quantity of the 24V lead-acid battery is less than a second threshold value, the number of the proton exchange membrane fuel batteries in the working state in the fuel battery protection system is detected, and when the number of the proton exchange membrane fuel batteries in the working state is greater than a third threshold value, any one group of the proton exchange membrane fuel batteries in the working state is controlled to charge the 24V lead-acid battery; when the number of the proton exchange membrane fuel cells in the working state is smaller than or equal to the third threshold value, the electric quantity prompt information containing the residual electric quantity of the 24V lead-acid battery is sent to the target terminal corresponding to the user through the wireless network module, so that the 24V lead-acid battery is guaranteed not to be over-discharged in different scenes, the cruising ability of the 24V lead-acid battery is guaranteed, the proton exchange membrane fuel cells are guaranteed not to be damaged in a low-temperature environment (lower than 0 ℃), and the service life of the proton exchange membrane fuel cells is prolonged.
Referring to fig. 3, which is a schematic flowchart of a charging method of a fuel cell protection system provided in an embodiment of the present invention, the charging method of the fuel cell protection system may be applied to a new energy vehicle, the fuel cell protection system includes at least one group of proton exchange membrane fuel cells, and further includes a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module, and a regenerative braking module, as shown in fig. 3, the charging method of the fuel cell protection system includes, but is not limited to, the following steps:
s301, if the current temperature of the fuel cell protection system is detected to be smaller than a first threshold value, connecting the heating cell with the heating module.
In the embodiment of the present invention, the temperature control switch disposed inside the fuel cell protection system may detect the current temperature inside the fuel cell protection system, and determine whether the current temperature inside the fuel cell protection system is less than a first threshold, for example, the first threshold may be 5 ℃, if so, it indicates that the current temperature inside the fuel cell protection system is low, and the fuel cell protection system needs to be heated and insulated, and the temperature control switch in the fuel cell protection system may be closed, so as to connect the connection between the heating cell and the heating module in the fuel cell protection system.
And S302, acquiring electric energy from the heating battery to heat the fuel cell protection system.
In the embodiment of the present invention, after the connection between the heating battery and the heating module in the fuel cell protection system is connected, the heating module in the fuel cell protection system may obtain electric energy from the heating battery connected thereto, and convert the obtained electric energy into heat energy to heat the fuel cell protection system. The heating battery can be a 24V lead-acid battery, and can also be other storage batteries such as a lithium ion battery and the like. The heating module can be a PTC thermistor, and can also be a common heating resistor or an electric heating element such as an electric heating ring, an electric heating rod, an electric heating wire and the like.
And S303, when the regenerative braking module generates electric energy, charging the heating battery by using the generated electric energy.
In the embodiment of the invention, after the connection between the heating module in the fuel cell protection system and the heating cell is connected, the heating module consumes the electric energy stored in the heating cell, so that when the regenerative braking module in the fuel cell protection system generates electric energy, the generated electric energy can be used for charging the heating cell in the fuel cell protection system.
In an alternative embodiment, the regenerative braking module in the fuel cell protection system may include an electric motor, a traction converter, and a drive shaft. The drive shaft may be used to connect the drive wheel and the motor. The driving wheel can be a wheel (comprising a front wheel and/or a rear wheel) of a new energy automobile. When a braking signal generated by a user when stepping on a brake or parking beside is detected, an input power supply of the motor is disconnected, the driving wheel performs deceleration movement due to the inertia effect and transmits the deceleration movement to the motor through a driving shaft connected with the driving wheel to drive a rotor of the motor to rotate, the motor is changed from a motor to an asynchronous generator at the moment to convert mechanical energy on the driving shaft into electric energy, and the traction converter converts alternating current generated on the motor into direct current to charge a heating battery due to the fact that the electric energy converted from the mechanical energy is alternating current. According to the embodiment of the invention, the regenerative braking module is used for converting the mechanical energy of the driving wheel into the electric energy to charge the heating battery, so that the utilization rate of energy can be improved.
And S304, detecting the residual electric quantity of the heating battery.
In the embodiment of the invention, the electric quantity detection module in the fuel cell protection system can detect the residual electric quantity of the heating cell in the fuel cell protection system in real time and report the detected residual electric quantity of the heating cell to the control module of the fuel cell protection system. The electric quantity detection module in the fuel cell protection system can be an electric quantity detection chip BQ27510 and the like.
S305, judging whether the residual capacity of the heating battery is smaller than a second threshold value.
In the embodiment of the present invention, the control module in the fuel cell protection system may receive the remaining power of the heating battery reported by the power detection module in the fuel cell protection system, and may determine whether the remaining power of the heating battery is smaller than the second threshold. Wherein the second threshold value may be 20% of the total capacity of the heating battery.
And S306, if yes, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery.
In the embodiment of the present invention, if yes, that is, the remaining power of the heating battery is smaller than the second threshold, which indicates that the remaining power of the heating battery is low, the control module in the fuel cell protection system may control at least one group of pem fuel cells in the fuel cell protection system to charge the heating battery; if not, that is, the remaining power of the heating battery is greater than or equal to the second threshold, which indicates that the remaining power of the heating battery is sufficient, the control module does not perform any operation, and the power detection module may continue to detect the remaining power of the heating battery. The residual electric quantity of the heating battery is detected in real time through the electric quantity detection module, the heating battery can be effectively charged in time, the heating battery is prevented from being over-discharged, the proton exchange membrane fuel battery is prevented from being damaged, and the service life of the proton exchange membrane fuel battery is prolonged.
In an alternative embodiment, the fuel cell system may further include a DCDC converter. If the remaining power of the heating battery is less than the second threshold, it indicates that the remaining power of the heating battery is low, and the control module in the fuel battery protection system can control at least one group of proton exchange membrane fuel batteries in the fuel battery protection system to convert the high voltage generated by the proton exchange membrane fuel batteries into the low voltage with a fixed voltage value through the DCDC converter, so as to charge the heating battery; if not, that is, the remaining power of the heating battery is greater than or equal to the second threshold, which indicates that the remaining power of the heating battery is sufficient, the control module does not perform any operation, and the power detection module may continue to detect the remaining power of the heating battery. Wherein the second threshold may be 20% of the total capacity of the heating battery.
The fuel cell protection system comprises at least one group of proton exchange membrane fuel cells, a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module and a regeneration braking module, wherein if the fuel cell protection system detects that the current temperature of the fuel cell protection system is smaller than a first threshold value, the connection between the heating cell and the heating module is connected, electric energy is obtained from the heating cell to heat the fuel cell protection system, when the regeneration braking module generates the electric energy, the generated electric energy is used for charging the heating cell, meanwhile, the residual electric quantity of the heating cell is detected, whether the residual electric quantity of the heating cell is smaller than a second threshold value is judged, and if yes, the at least one group of proton exchange membrane fuel cells is controlled to charge the heating cell. The endurance of the heating battery can be improved, so that the proton exchange membrane fuel battery is not damaged in a low-temperature environment (lower than 0 ℃) and the service life of the proton exchange membrane fuel battery is prolonged.
Referring to fig. 4, which is a schematic flowchart of a charging method of another fuel cell protection system provided in an embodiment of the present invention, the charging method of the fuel cell protection system may be applied to a new energy vehicle, the fuel cell protection system includes at least one group of proton exchange membrane fuel cells, and further includes a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module, and a regenerative braking module, as shown in fig. 4, the charging method of the fuel cell protection system includes, but is not limited to, the following steps:
s401, if the current temperature of the fuel cell protection system is smaller than a first threshold value, connecting the heating cell with the heating module.
S402, obtaining electric energy from the heating battery to heat the fuel cell protection system.
And S403, when the regenerative braking module generates electric energy, charging the heating battery by using the generated electric energy.
S404, detecting the residual electric quantity of the heating battery.
S405, judging whether the residual capacity of the heating battery is smaller than a second threshold value.
Steps S401 to S405 in the embodiment of the present invention refer to steps S301 to S305 in the embodiment shown in fig. 3, and are not described herein again.
S406, if the residual electric quantity of the heating battery is smaller than the second threshold value, detecting the number of the proton exchange membrane fuel cells in the working state in the fuel cell protection system.
In an embodiment of the present invention, if the remaining power of the heating battery in the fuel cell protection system is less than the second threshold, which indicates that the remaining power of the heating battery is low, the control module in the fuel cell protection system may detect the number of the pem fuel cells in the fuel cell protection system that are in the operating state. Wherein the second threshold may be 20% of the total capacity of the heating battery. The proton exchange membrane fuel cell in the working state can be a proton exchange membrane fuel cell which generates hydrogen gas reaction to generate electric energy.
And S407, if the number of the proton exchange membrane fuel cells in the working state is greater than a third threshold value, controlling any group of proton exchange membrane fuel cells in the working state to charge the heating battery.
In the embodiment of the invention, if the number of the proton exchange membrane fuel cells in the working state is greater than the third threshold, it indicates that the electric energy provided by the proton exchange membrane fuel to the new energy vehicle is sufficient, and the control module in the fuel cell protection system can control any group of proton exchange membrane fuel cells in the working state to charge the heating cell in the fuel cell protection system. For example, the operating states of the pem fuel cells are A, B, C three groups, and the control module may select A, B, C of the three groups of pem fuel cells to charge the heating cells according to a preset rule. The third threshold may be a preset fixed value, or may be set according to the total number of the pem fuel cells in the fuel cell protection system, for example, the total number of the pem fuel cells in the fuel cell protection system is 6, and the third threshold may be half (3) of the total number of the pem fuel cells. By detecting the number of the proton exchange membrane fuel cells in the working state in the fuel cell protection system, when the electric energy of the new energy automobile is sufficient, the heating cell can be charged by using the redundant electric energy of the proton exchange membrane fuel cells in the working state, so that the normal operation of the new energy automobile is ensured, the cruising ability of the heating cell is also ensured, the proton exchange membrane fuel cells are not damaged, and the service life of the proton exchange membrane fuel cells is prolonged.
And S408, if the number of the proton exchange membrane fuel cells in the working state is less than or equal to the third threshold, sending electric quantity prompt information containing the residual electric quantity of the heating cell to a target terminal corresponding to a user, wherein the electric quantity prompt information is used for prompting the user to charge the heating cell.
In the embodiment of the present invention, if the number of the proton exchange membrane batteries in the operating state is less than or equal to the third threshold, it indicates that the proton exchange membrane fuel battery supplies less electric energy to the new energy vehicle or the proton exchange membrane fuel battery does not operate, and the control module of the fuel cell protection system may send the electric quantity prompt information including the remaining electric quantity of the heating battery to the target terminal corresponding to the user through a Wireless network module, such as bluetooth, Wireless Local Area Networks (WLAN), and the like. The wireless network module can be integrated on the control module or exist independently of the control module. The target terminal corresponding to the user can be intelligent equipment such as a smart phone, a notebook computer, an intelligent watch and an IPAD. This electric quantity prompt message can be used to indicate the user to charge the heating battery. The wireless network module sends electric quantity prompt information to the target terminal to prompt a user to charge the heating battery, so that the problems that the heating battery is over-discharged under the condition that the proton exchange membrane fuel battery does not work for a long time, the heating efficiency of the heating module is low, the proton exchange membrane fuel battery cannot be heated and insulated, and the proton exchange membrane fuel battery is damaged and the like can be effectively solved.
In the embodiment of the invention, if the fuel cell protection system detects that the current temperature of the fuel cell protection system is less than a first threshold value, the connection between the heating cell and the heating module is switched on, electric energy is obtained from the heating cell to heat the fuel cell protection system, when the regenerative braking module generates electric energy, the generated electric energy is used for charging the heating cell, the residual electric quantity of the heating cell is detected, whether the residual electric quantity of the heating cell is less than a second threshold value or not is judged, if so, the number of proton exchange membrane fuel cells in a working state in the fuel cell protection system is detected, if the number of proton exchange membrane fuel cells in the working state is greater than a third threshold value, any group of proton exchange membrane fuel cells in the working state is controlled to charge the heating cell, and if the number of proton exchange membrane fuel cells in the working state is less than or equal to the third threshold value, and sending electric quantity prompt information containing the residual electric quantity of the heating battery to a target terminal corresponding to the user. By detecting the number of the proton exchange membrane fuel cells in the working state, when the electric energy of the new energy automobile is sufficient, the proton exchange membrane fuel in the working state is used for charging the heating cell, and under the condition that the proton exchange membrane fuel does not work for a long time, the user is prompted to charge the heating cell by using the electric quantity prompting information, so that a more complete charging scheme of the fuel cell protection system is provided, the cruising ability of the heating cell can be improved, the proton exchange membrane fuel cell is prevented from being damaged in a low-temperature environment (lower than 0 ℃), and the service life of the proton exchange membrane fuel cell is prolonged.
Embodiments of the present invention also provide a program including program instructions that, when loaded into a controller, cause the controller to perform the charging method of the fuel cell protection system described above with reference to fig. 3 or 4.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The fuel cell protection system is characterized by comprising at least one group of proton exchange membrane fuel cells, a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module and a regenerative braking module, wherein:
one end of the temperature control switch is connected with one end of the heating module, the other end of the temperature control switch is connected with one end of the heating battery, and the temperature control switch is used for switching on the connection between the heating battery and the heating module if the current temperature of the fuel cell protection system is detected to be smaller than a first threshold value;
the heating module is used for acquiring electric energy from the heating battery to heat the fuel cell protection system;
the regenerative braking module is used for charging the heating battery by using the generated electric energy when the regenerative braking module generates the electric energy;
the electric quantity detection module is used for detecting the residual electric quantity of the heating battery;
the control module is used for acquiring the residual electric quantity of the heating battery from the electric quantity detection module;
the control module is further configured to determine whether the remaining power of the heating battery is smaller than a second threshold, detect the number of the proton exchange membrane fuel cells in a working state in the fuel cell protection system if the remaining power of the heating battery is smaller than the second threshold, and control any one group of the proton exchange membrane fuel cells in the working state to charge the heating battery if the number of the proton exchange membrane fuel cells in the working state is larger than a third threshold;
the control module is further configured to send an electric quantity prompt message including the remaining electric quantity of the heating battery to a target terminal corresponding to a user when the number of the proton exchange membrane fuel cells in the working state is less than or equal to the third threshold, where the electric quantity prompt message is used to prompt the user to charge the heating battery, and the third threshold is half of the total number of the proton exchange membrane fuel cells.
2. The system of claim 1, wherein the fuel cell protection system further comprises a DCDC converter;
the DCDC converter is used for converting high-voltage electricity generated by the proton exchange membrane fuel cell into low-voltage electricity with a fixed voltage value;
the control module is specifically configured to:
and when the residual capacity of the heating battery is smaller than the second threshold value, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery through the DCDC converter.
3. The system of claim 1, wherein the regenerative braking module comprises an electric motor, a traction converter, and a drive shaft;
the driving shaft is used for connecting a driving wheel and the motor;
when a braking signal generated by braking operation is detected, the input power supply of the motor is disconnected, the state of the motor is changed from a motor state to a generator state, mechanical energy on the driving wheels is transmitted to the motor through the driving shaft, the motor converts the mechanical energy on the driving shaft into alternating current, and the traction converter converts the alternating current generated on the motor into direct current to charge the heating battery.
4. A charging method of a fuel cell protection system is characterized in that the fuel cell protection system comprises at least one group of proton exchange membrane fuel cells, and further comprises a temperature control switch, a heating module, a heating cell, a control module, an electric quantity detection module and a regenerative braking module, wherein one end of the temperature control switch is connected with one end of the heating module, and the other end of the temperature control switch is connected with one end of the heating cell, and the method comprises the following steps:
if the current temperature of the fuel cell protection system is detected to be smaller than a first threshold value, connecting the heating cell with the heating module;
acquiring electric energy from the heating battery to heat the fuel cell protection system;
when the regenerative braking module generates electric energy, charging the heating battery with the generated electric energy;
detecting the residual electric quantity of the heating battery;
judging whether the residual electric quantity of the heating battery is smaller than a second threshold value or not;
if yes, detecting the number of the proton exchange membrane fuel cells in the working state in the fuel cell protection system; if the number of the proton exchange membrane fuel cells in the working state is larger than a third threshold value, controlling any group of proton exchange membrane fuel cells in the working state to charge the heating cell;
and if the number of the proton exchange membrane fuel cells in the working state is less than or equal to the third threshold, sending electric quantity prompt information containing the residual electric quantity of the heating cell to a target terminal corresponding to a user, wherein the electric quantity prompt information is used for prompting the user to charge the heating cell.
5. The method of claim 4, wherein the fuel cell protection system further comprises a DCDC converter;
if yes, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery, and the method comprises the following steps:
and if the residual electric quantity of the heating battery is smaller than the second threshold value, controlling the at least one group of proton exchange membrane fuel cells to charge the heating battery through the DCDC converter.
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| CN111261906A (en) * | 2018-11-30 | 2020-06-09 | 四川众鑫阳科技有限公司 | Hydrogen supply discharge protection system of fuel cell |
| CN112026588B (en) * | 2019-11-28 | 2022-05-06 | 长城汽车股份有限公司 | Battery pack control method and system and vehicle |
| CN111409509B (en) * | 2020-04-04 | 2021-10-29 | 东风汽车集团有限公司 | Fuel cell system and idle speed control method thereof |
| CN111516555B (en) * | 2020-04-26 | 2022-10-21 | 东风柳州汽车有限公司 | Temperature adjusting system and method for vehicle-mounted battery |
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| CN113540520B (en) * | 2021-07-23 | 2022-10-21 | 成都亿华通动力科技有限公司 | Asynchronous starting method and device of double galvanic piles |
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