CN115742878A - Dynamic low-temperature starting method and device of battery, electronic equipment and vehicle - Google Patents
Dynamic low-temperature starting method and device of battery, electronic equipment and vehicle Download PDFInfo
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Abstract
The application provides a dynamic low-temperature starting method of a battery, after a fuel battery is started, the actual output power of the fuel battery is determined according to the request power and the maximum output power of a whole vehicle, after the vehicle enters an emergency load reduction state, because the charging power of a power battery is very small or even 0kW at low temperature, the power battery and an electric heater are controlled to consume the actual output power in time, the electric heater is increased to consume the actual output power, the output power of the fuel battery to the power battery is reduced or even avoided, the process of determining the actual output power ensures that the power battery and the electric heater can consume all the actual output power until the temperature of a cooling liquid reaches a preset temperature threshold, the fuel battery is started, and the problem that the power battery is overcharged when the vehicle is subjected to emergency load reduction due to the low temperature of the power battery in the low-temperature cold starting process of the vehicle is solved.
Description
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a method and an apparatus for dynamically starting a battery at a low temperature, an electronic device, and a vehicle.
Background
With the current conditions that global resources are gradually deficient and environmental pollution is gradually serious, environmental protection becomes a subject of attention of each industry, the automobile industry is no exception, automobile industries and component developers in various countries and countries pay more attention to whether a fuel capable of protecting the environment and saving resources is applied to automobiles, so that a hydrogen fuel cell is generally concerned at home and abroad as a clean, efficient and pollution-free electrochemical power generation device, meanwhile, the hydrogen fuel cell automobile becomes a mainstream of current automobile industry development, therefore, the safety and economy of the fuel cell automobile become subjects of attention of each automobile enterprise, but when the temperature of a power battery of the automobile is lower than-20 ℃, the requested power of the whole automobile is small (generally less than 10 KW) and the power battery has no recharging capability, after the automobile is subjected to emergency load reduction, the output power of the fuel cell is larger than the charging power of the power battery, the power of the power battery is overcharged, and the starting of the fuel cell is forbidden, so that the automobile can only be powered down when the power battery is lower.
Disclosure of Invention
In view of the above, an object of the present application is to provide a method and an apparatus for dynamic low-temperature start of a battery, an electronic device, and a vehicle, which solve the problem of overcharge of a power battery when a vehicle is suddenly unloaded due to low temperature of the power battery during low-temperature cold start of a fuel cell of the vehicle.
In view of the above, a first aspect of the present application provides a dynamic low-temperature start method for a battery, including:
if the current electric quantity of the power battery meets the cold start condition of the fuel battery, starting the fuel battery;
determining the maximum output power of the fuel cell and the total vehicle request power of the vehicle;
determining the actual output power of the fuel cell according to the finished automobile requested power and the maximum output power;
if the vehicle enters an emergency load reduction state, controlling the power battery to stop discharging, controlling the power battery and the electric heater to perform power consumption on the actual output power, and detecting the temperature of the cooling liquid of the fuel cell in real time;
and if the temperature of the cooling liquid reaches a preset temperature threshold value, finishing the starting of the fuel cell.
Optionally, the determining the maximum output power of the fuel cell comprises:
determining the current temperature of the power battery, and determining the charging power of the power battery according to the current temperature;
determining a power rating of the electric heater;
and determining the maximum output power of the fuel cell according to the rated power and the charging power.
Optionally, determining the actual output power of the fuel cell according to the requested power of the whole vehicle and the maximum output power includes:
if the requested power of the whole vehicle is smaller than or equal to the rated power, determining the rated power as the actual output power of the fuel cell;
and if the requested power of the whole vehicle is larger than the rated power, determining the maximum output power as the actual output power of the fuel cell.
Optionally, the power consumption includes charging power consumption and heating power consumption, and the controlling the power battery and the electric heater to perform power consumption on the actual output power includes:
determining the required power of the electric heater if the rated power is the actual output power of the fuel cell;
calculating the difference power of the actual output power and the requested power of the whole vehicle, and determining the heating power consumption and the charging power consumption according to the difference power and the required power.
Optionally, the power consumption includes charging power consumption and heating power consumption, and the controlling the power battery and the electric heater to perform power consumption on the actual output power includes:
and if the maximum output power is the actual output power of the fuel cell, determining the charging power as charging power consumption, and determining the rated power as the heating power consumption.
Optionally, the determining the heating power consumption according to the difference power and the required power includes:
if the required power is larger than or equal to the difference power, determining the required power as the heating power consumption;
and if the required power is smaller than the difference power, determining the difference power as the heating power consumption.
Optionally, the vehicle enters an emergency load-shedding state, including:
detecting the opening degree of a brake pedal of the vehicle in real time;
and if the opening degree is smaller than or equal to a preset opening degree threshold value, determining that the vehicle enters the emergency load-shedding state.
A second aspect of the present application provides a dynamic low-temperature starting apparatus of a battery, including:
a battery start module configured to: if the current electric quantity of the power battery meets the cold start condition of the fuel battery, starting the fuel battery;
a power confirmation module configured to: determining the maximum output power of the fuel cell and the total vehicle request power of the vehicle;
an output confirmation module configured to: determining the actual output power of the fuel cell according to the finished automobile request power and the maximum output power;
a power consumption module configured to: if the vehicle enters an emergency load reduction state, controlling the power battery to stop discharging, controlling the power battery and the electric heater to perform power consumption on the actual output power, and detecting the temperature of the cooling liquid of the fuel cell in real time;
a state detection module configured to: and if the temperature of the cooling liquid reaches a preset temperature threshold value, finishing the starting of the fuel cell.
A third aspect of the present application provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method as provided by the first aspect of the present application when executing the program.
A fourth aspect of the present application provides a vehicle comprising the electronic device as provided in the third aspect of the present application.
From the above, it can be seen that according to the dynamic low-temperature starting method, apparatus, electronic device and vehicle of the battery provided by the present application, after the fuel cell is started, the maximum output power of the fuel cell and the vehicle request power of the vehicle need to be determined, and the actual output power of the fuel cell is determined according to the vehicle request power and the maximum output power, after the vehicle enters the emergency load shedding state, the power battery is controlled to stop discharging, but since the charging power of the power battery is affected by temperature and electric quantity, the charging power of the power battery at low temperature is very small or even 0kW, so that the power battery and the electric heater are controlled to consume power for the actual output power, the electric heater is increased to consume the actual output power, and the output power of the power battery from the fuel cell is reduced or even avoided, and the determination of the actual output power ensures that the power battery and the electric heater can consume all the actual output power until the cooling reaches the preset temperature threshold, the fuel cell is started completely, thereby solving the problem that the power battery is overcharged when the vehicle drops load suddenly due to low temperature of the power battery in the low temperature in the low-temperature cold starting process of the vehicle fuel cell of the vehicle.
Drawings
In order to more clearly illustrate the technical solutions in the present application or the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a dynamic low-temperature start method of a battery according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of determining the maximum output power of a fuel cell according to an embodiment of the present application;
FIG. 3 is a flowchart of determining an actual output power of a fuel cell according to an embodiment of the present application;
FIG. 4 is a flow chart illustrating power consumption according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a dynamic low-temperature start device of a battery according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings in combination with specific embodiments.
It should be noted that technical terms or scientific terms used in the embodiments of the present application should have a general meaning as understood by those having ordinary skill in the art to which the present application belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in the background art, in the related art, when the power cell temperature of a vehicle using a fuel cell is lower than-15 ℃, the charging power of the power cell is low, and when the power cell temperature is lower than-20 ℃, the charging power of the power cell is almost 0KW; when the temperature of the cooling liquid of the fuel cell is lower than 5 ℃, the fuel cell is started in cold start, the current of the fuel cell at least reaches 75A in the cold start process of the fuel cell, the power generated by the fuel cell is 23KW, otherwise, the inside of the fuel cell has the inverse pole risk and the service life of the fuel cell is influenced, but the accessories of the fuel cell can consume 13kW at most, so the net output power of the fuel cell is 10kW +/-1 kW.
Therefore, when the temperature of the power battery is lower than-15 ℃ and the electric quantity of the power battery is lower than a starting threshold value of the fuel battery, the fuel battery needs to be started in order to meet the dynamic energy balance of the vehicle and prevent the power battery from being fed, but when the temperature of the power battery of the vehicle is lower than-15 ℃, the requested power of the whole vehicle is small and the power battery has no recharging capability (the charging power of the power battery is lower, even 0 KW), and in an emergency load reduction state, the vehicle only allows the actual output power of the fuel battery to be smaller than or equal to the rechargeable power of the power battery, but the charging and discharging power of the power battery is affected by the temperature and the current electric quantity, so the rechargeable power of the power battery is very small at low temperature, even 0KW, the output power of the fuel battery can be subjected to transient charging on the power battery, possibly leading to the reduction of the service life of the power battery, so that the vehicle can prohibit starting of the fuel battery (because the output power of the fuel battery needs to be guaranteed to be smaller than or equal to the rechargeable power battery at low temperature when the vehicle is braked emergently, otherwise, the output power battery cannot be instantaneously reduced, and the vehicle can only lead to the pure cold power battery can be generated when the vehicle is started.
In the related art, the output power of the fuel cell is requested according to the chargeable power of the power cell, when the chargeable power of the power cell is less than 5kW, a Central Computing Unit (CCU) prompts a driver to "the power cell is at a low temperature and requires heating" through an Instrument (IP), and the fuel cell cannot be started before heating is completed, so that the driving experience of a customer is poor.
According to the dynamic low-temperature starting method of the battery, when the electric quantity of the power battery is lower than the starting threshold value of the fuel battery, pure electricity of the vehicle is conducted and the fuel battery is started, the power battery preferentially drives the vehicle and provides the electric quantity required by starting of the fuel battery when the vehicle starts, the fuel battery completely drives the vehicle and does not charge the power battery at the moment, but at the moment, the output power of the fuel battery is required to be smaller than or equal to the sum of the chargeable power of the power battery and the discharge rated power of the electric heater of the power battery, so that when the vehicle suddenly drops the load, the actual output power of the fuel battery can be charged to the power battery and consumed by the electric heater of the whole vehicle, the problem that the power battery is overcharged when the vehicle suddenly drops the load due to low temperature of the power battery in the low-temperature cold starting process of the vehicle is solved, the fuel battery can be started smoothly until the temperature of the cooling liquid reaches the preset temperature threshold value, and the fuel battery is started completely, and the method is specifically described by combining with the following embodiments.
In some embodiments, after a user performs a power-on operation, the current electric quantity of the power battery needs to be detected, when the current electric quantity is less than or equal to a preset power-off electric quantity, it is determined that the electric power of the power battery is too low, a power-on process is stopped, and a driver is informed that the electric quantity of the power battery is too low; when the current electric quantity is larger than the preset power-off electric quantity, comparing the current electric quantity with a starting threshold value of the fuel cell, if the current electric quantity is larger than the starting threshold value, indicating that the electric quantity of the power cell is sufficient, and carrying out pure power-on; if the current electric quantity is less than or equal to the starting threshold, indicating that the electric quantity of the power battery is insufficient, starting the fuel battery, if the temperature of the cooling liquid meets the cold starting condition of the fuel battery, controlling the battery to carry out low-temperature cold starting, determining the whole vehicle request power of the vehicle after the low-temperature cold starting of the fuel battery, determining the maximum output power of the fuel battery according to the charging power of the power battery and the rated power of the electric heater, then determining the actual output power of the fuel battery according to the maximum output power and the whole vehicle request power, and consuming the actual output power of the fuel battery when an emergency vehicle descending condition occurs, wherein the electric heater is preferentially controlled to consume the actual output power before the rated power of the electric heater is reached, and the power battery is controlled to consume the remaining actual output power under the condition of remaining power, so that the overcharge of the power battery is avoided until the temperature of the power battery reaches the preset temperature threshold, and the completion of the starting of the fuel battery is confirmed.
In some embodiments, as shown in fig. 1, a method for dynamic cold start of a battery includes:
step 100: and if the current electric quantity of the power battery meets the cold start condition of the fuel battery, starting the fuel battery.
In this step, the dynamic state means that an emergency load down state occurs during a low-temperature cold start of the fuel cell. Since the low-temperature starting method of the battery provided in the embodiment of the present application is a starting method of a fuel cell in a low-temperature environment when the power battery is low in electric quantity (for example, the temperature of the power battery is lower than-20 ℃ and the temperature of the fuel cell is lower than 5 ℃), first determining the current electric quantity of the power battery, optionally, when a driver executes a power-ON operation process of the vehicle, for example, inserting a vehicle key into a key hole, turning the vehicle key to an "ON" flag, starting to control the vehicle to execute the power-ON process by a Central control switch module (CCU) disposed in the vehicle, at this time, the Central control switch module first needs to detect a state-of-charge (SOC) of the power battery to determine the current electric quantity, and if the current electric quantity of the power battery is less than or equal to 5%, it is considered that the electric quantity of the power battery is low, the CCU cannot control the vehicle to continue to execute the power-ON process, and then prompting the driver through an Instrument (Instrument Panel, IP); if the current electric quantity of the power battery is larger than 5%, the central Control switch module CCU controls the vehicle to execute pure electricity, the current electric quantity of the power battery is continuously detected after the pure electricity of the vehicle is finished, and when the current electric quantity of the power battery reaches a Fuel battery starting threshold value, the central Control switch module CCU requests the Fuel battery to start and sends a starting request to a Fuel Control Unit (FCU); after receiving a start request sent by a central control switch module CCU, a fuel control unit FCU controls a fuel cell system to start and detect the temperature of cooling liquid of a fuel cell, if the temperature of the cooling liquid is greater than 5 ℃, the fuel cell executes normal-temperature start, the start type is determined to be a normal-temperature start mode, if the temperature of the cooling liquid is less than or equal to 5 ℃, the fuel cell executes low-temperature cold start, the start type is determined to be a cold start mode, and then the fuel control unit FCU sends the start type of the fuel cell to the central control switch module CCU and controls the fuel cell to start according to the start type.
Step 200: the maximum output power of the fuel cell and the total requested power of the vehicle are determined.
In this step, the maximum output power of the fuel cell refers to the maximum power allowed to be discharged by the fuel cell in order to avoid damage of the power cell due to overcharge during cold start, and may be, for example, composed of two parts, namely, the rated power of the electric heater and the charging power of the power cell, where the rated power of the electric heater refers to the effective power that the electric heater can continuously output, that is, the maximum power that the electric heater can continuously operate under normal operating environment, that is, the maximum power that the electric heater can consume; the whole vehicle requested power of the vehicle is power which is requested to be provided by a power battery and/or a fuel battery when the vehicle executes the operation of a driver; after the cold start of the fuel cell is finished, the vehicle is driven by the fuel cell and the power cell is not charged at the moment, but the output power of the fuel cell needs to be less than or equal to the sum of the charging power of the power cell and the rated power of the electric heater at the moment.
Step 300: and determining the actual output power of the fuel cell according to the request power and the maximum output power of the whole vehicle.
In the step, firstly, the magnitude relation between the requested power of the whole vehicle and the rated power of the electric heater needs to be determined, and if the requested power of the whole vehicle is less than or equal to the rated power, the rated power is determined as the actual output power of the fuel cell; and if the requested power of the whole vehicle is larger than the rated power, determining the maximum output power as the actual output power of the fuel cell.
Step 400: and if the vehicle enters an emergency load-reducing state, controlling the power battery to stop discharging, controlling the power battery and the electric heater to perform power consumption on actual output power, and detecting the temperature of the cooling liquid of the fuel cell in real time.
In this step, when the driver performs an emergency load-reducing operation on the vehicle (for example, the brake pedal is stepped to the bottom to perform emergency braking), the vehicle enters an emergency load-reducing state, at this time, the power battery is controlled to stop discharging, the discharging power of the power battery is rapidly reduced to 0kW, but the output power of the fuel battery cannot be instantaneously reduced, so that at this time, it is necessary to consume the current part of the actual output power of the fuel battery by using the electric heater, to avoid that the actual power of the fuel battery is greater than the charging power of the power battery, which causes overcharge of the power battery, and detect the temperature of the coolant of the fuel battery in real time to determine the start-up completion state of the fuel battery.
Step 500: and if the temperature of the cooling liquid reaches a preset temperature threshold value, finishing the starting of the fuel cell.
In this step, the start-up completion state of the fuel cell is determined by detecting the fuel cell coolant temperature in real time, and when the coolant temperature reaches the preset temperature threshold of 40 ℃, it can be determined that the start-up of the fuel cell is completed. When the temperature of the power battery exceeds-15 ℃, the fuel battery can be controlled to exit the cold start mode, because the charging power of the power battery rapidly rises due to the increase of the temperature, the charging power of the power battery far exceeds the determined power of the electric heater and is possibly greater than the requested power of the whole vehicle at the moment, after the vehicle enters an emergency downshift state again, the actual output power of the fuel battery can be partially or completely recycled by preferentially utilizing the power battery from the aspect of energy recycling under the condition that the requested power is smaller, and if the actual output power is greater than the charging power, the remaining power is consumed by utilizing the electric heater without generating the risk of overcharge; from the perspective of absolute safety, the electric heater can be selected to be preferentially used for partially or completely consuming the actual output power of the fuel cell, and if the actual output power is larger than the rated power, the power cell is reused for recycling the residual power.
In summary, according to the dynamic low-temperature start method of the battery provided by the embodiment of the present application, when the electric quantity of the power battery is lower than the start threshold of the fuel battery, and after the fuel battery is cold-started, it needs to be ensured that the actual output power of the fuel battery is less than or equal to the sum of the chargeable power of the power battery and the rated power of the electric heater, so that when the vehicle is suddenly unloaded, the actual output power of the fuel battery is charged to the power battery and consumed by the electric heater, thereby solving the problem that the temperature of the power battery is low during the low-temperature cold start of the vehicle fuel battery, which causes the power battery to be overcharged during the sudden unloading of the vehicle, and smoothly starting the fuel battery until the temperature of the coolant reaches the preset temperature threshold, and the fuel battery is started completely.
In some embodiments, as shown in fig. 2, determining the maximum output power of the fuel cell comprises:
step 210: and determining the current temperature of the power battery, and determining the charging power of the power battery according to the current temperature.
In the step, because the charging power of the power electricity and the current temperature of the power battery are in a positive correlation relationship, and the change rate is large, a small temperature change can generate a large change of the charging power; the charging power of the power electricity and the electric quantity of the power battery are in a negative correlation relationship, the change rate is small, and large change of the electric quantity can generate large change of the charging power; exemplarily, when the current temperature is-18 ℃ and the electric quantity is 6%, if the charging power of the power battery is 19KW (when the temperature is lower than-20 ℃, the charging power may rapidly drop to 0 KW), when the temperature rises to-10 ℃, the charging power may reach 45KW under the premise of no change of the electric quantity; and under the condition that the current temperature is not changed, when the electric quantity is increased from 6% to 10%, the charging power of the power battery is only changed from 19KW to 18KW, so that when the fuel battery is determined to be in cold start, the current temperature of the power battery is lower than-15 ℃ at the moment, the electric quantity is lower than the starting threshold of the fuel battery, the change of the electric quantity hardly causes the change of the power at the moment, and the charging power of the power battery is determined mainly by the current temperature.
Step 220: the power rating of the electric heater is determined.
In this step, since the electric heaters of different vehicles are different in type and kind and have different rated powers, it is necessary to store the rated powers of the electric heaters in advance and to check the rated powers of the motor heaters by referring to the stored data when necessary.
Step 230: and determining the maximum output power of the fuel cell according to the rated power and the charging power.
In this step, the nominal power P is calculated, for example PTC And charging power P BC And, P F ＝P BC +P PTC A 1 is to P F The rated power and the charging power are determined as the maximum output power of the fuel cell, and the rated power and the charging power are used as the maximum output power, so that the power cell and the electric heater can consume all the actual output power after the vehicle enters an emergency load-reducing state, the phenomenon that the power cell is overcharged or the electric heater is overloaded to operate due to overhigh power is avoided, and potential safety hazards are reduced.
In some embodiments, as shown in fig. 3, determining the actual output power of the fuel cell according to the requested power and the maximum output power of the entire vehicle includes:
step 310: and if the requested power of the whole vehicle is smaller than or equal to the rated power, determining the rated power as the actual output power of the fuel cell.
In the step, if the requested power of the whole vehicle is less than or equal to the rated power, the rated power is determined as the actual output power of the fuel cell, because when the requested power of the whole vehicle is less than or equal to the rated power, the actual output power of the fuel cell is controlled to be equal to the requested power of the whole vehicle, although the requested power of the whole vehicle can meet the driving requirement of a driver, the power cell does not operate at the moment, the temperature rising speed is slow, and therefore the rated power P is used PTC And requested power P of whole vehicle V The electric heater is operated by the difference power, so that the temperature of the power battery is increased, and the time for finishing the starting of the fuel battery is shortened; and after the vehicle enters an emergency load-reducing state, the electric heater can consume all the actual output power, so that the danger of transient charging on the power battery is avoided.
Step 320: and if the requested power of the whole vehicle is larger than the rated power, determining the maximum output power as the actual output power of the fuel cell.
In the step, if the requested power of the whole vehicle is larger than the rated power, the maximum output power is determined as the actual output power of the fuel cell, and when the requested power of the whole vehicle is larger than the rated power, the actual output power of the fuel cell is controlled to be equal to the requested power of the whole vehicle, although the requested power of the whole vehicle can meet the driving requirement of a driver, the power cell does not operate at the moment, the temperature rising speed is slow, so the maximum output power P is utilized F And requested power of whole vehicleP V The electric heater is operated by the difference power, so that the temperature of the power battery is increased, and the starting completion time of the fuel battery is shortened; after the vehicle enters an emergency load-reducing state, because the sum of the charging power of the power battery and the rated power of the electric heater is equal to the maximum output power, the power battery and the electric heater can consume all the actual output power at the moment, and the danger of transient charging of the power battery is avoided.
In some embodiments, as shown in fig. 4, the power consumption includes charging power consumption and heating power consumption, and the controlling of the power battery and the electric heater to perform power consumption on the actual output power includes:
step 410: and if the rated power is the actual output power of the fuel cell, determining the required power of the electric heater.
In this step, after determining that the actual output power of the fuel cell is the rated power of the electric heater, the required power of the electric heater at this time, which is the power required by the driver to adjust the heating equipment such as the air conditioner in the vehicle, may be determined, and may be added with some other heating power that is present by default, for example, the consumed power of a separate heater dedicated to heating the coolant, to determine that the required power can be better distributed to the actual output power of the fuel cell at the time of the emergency load reduction.
Step 420: and calculating the difference power between the actual output power and the requested power of the whole vehicle, and determining the heating power consumption and the charging power consumption according to the difference power and the requested power.
Wherein determining the heating power consumption and the charging power consumption from the difference power and the demanded power comprises:
if the required power is larger than or equal to the difference power, determining the required power as the heating power consumption;
and if the required power is less than the difference power, determining the difference power as the heating power consumption.
In specific implementation, the difference power between the actual output power and the requested power of the whole vehicle is calculated firstly, and if the requested power is greater than or equal to the difference power, the requested power is determined as the heating power consumption, wherein the difference power cannot meet the requested power of the electric heater, and in order to meet the heating requirement of a driver, the difference power is compensated by using the power battery, so that the electric heater can operate at the requested power, the heating requirement of the driver is ensured, the temperatures of the vehicle, the power battery and the cooling liquid are increased as soon as possible, and the driving experience of the driver is improved; and if the required power is less than the difference power, determining the difference power as heating power consumption, and because of the lower temperature, in order to avoid the risk of excessive charging of the power battery, when the electric heater can consume all the difference power, enabling the electric heater to operate at the difference power so as to protect the power battery.
In some embodiments, the power consumption includes charging power consumption and heating power consumption, and controlling the power battery and the electric heater to perform power consumption on the actual output power includes:
and if the maximum output power is the actual output power of the fuel cell, determining the charging power as the charging power consumption, and determining the rated power as the heating power consumption.
In specific implementation, because the vehicle enters an emergency load reduction state, the actual output power of the fuel cell is the maximum output power, and the maximum output power is greater than the rated power of the electric heater, if the electric heater operates at the actual output power, the electric heater is overloaded, the electric heater is damaged, even potential safety hazards such as fire hazard occur and the like are generated, the electric heater cannot consume all the actual output power at the moment, the maximum output power of the fuel cell is limited, so that after the electric heater consumes the actual output power at the rated power, the redundant actual output power is equal to the charging power at the moment, the power battery is consumed by utilizing the power battery, the problem of overcharging of the power battery is avoided, and the emergency load reduction operation is ensured not to damage the power battery and the electric heater.
In some embodiments, the vehicle enters an emergency derating state, comprising:
detecting the opening degree of a brake pedal of a vehicle in real time;
and if the opening degree is smaller than or equal to a preset opening degree threshold value, determining that the vehicle enters an emergency load-reducing state.
In an exemplary embodiment, the emergency load reduction can be simply understood as that a driver performs emergency brake operation, so that the opening degree of a brake pedal of a vehicle needs to be detected in real time, when the emergency load reduction is performed, the driver can press the brake pedal hard, the opening degree of the brake pedal can be reduced rapidly, and when the opening degree is smaller than or equal to a preset opening degree threshold value, it is determined that the vehicle will enter an emergency load reduction state.
It should be noted that the method of the embodiment of the present application may be executed by a single device, such as a computer or a server. The method of the embodiment can also be applied to a distributed scene and completed by the mutual cooperation of a plurality of devices. In this distributed scenario, one device of the multiple devices may only perform one or more steps of the method of the embodiment of the present application, and the multiple devices interact with each other to complete the method.
It should be noted that the foregoing describes some embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Based on the same inventive concept, the application also provides a dynamic low-temperature starting device of the battery, which corresponds to the method of any embodiment.
Referring to fig. 5, the dynamic cold start apparatus of a battery includes:
a battery activation module 10 configured to: if the current electric quantity of the power battery meets the cold start condition of the fuel battery, starting the fuel battery;
a power confirmation module 20 configured to: determining the maximum output power of the fuel cell and the whole vehicle request power of the vehicle;
an output validation module 30 configured to: determining the actual output power of the fuel cell according to the request power and the maximum output power of the whole vehicle;
a power consumption module 40 configured to: if the vehicle enters an emergency load-reducing state, controlling the power battery to stop discharging, controlling the power battery and the electric heater to perform power consumption on actual output power, and detecting the temperature of the cooling liquid of the fuel cell in real time;
a state detection module 50 configured to: and if the temperature of the cooling liquid reaches a preset temperature threshold value, finishing the starting of the fuel cell.
For convenience of description, the above devices are described as being divided into various modules by functions, which are described separately. Of course, the functionality of the various modules may be implemented in the same one or more pieces of software and/or hardware in the practice of the present application.
The device of the above embodiment is used to implement the corresponding method for dynamically starting a battery at a low temperature in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
Based on the same inventive concept, corresponding to the method of any embodiment, the present application further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the method for dynamically starting a battery according to any embodiment is implemented.
Fig. 6 is a schematic diagram illustrating a more specific hardware structure of an electronic device according to this embodiment, where the electronic device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein the processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 are communicatively coupled to each other within the device via bus 1050.
The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the technical solutions provided in the embodiments of the present disclosure.
The Memory 1020 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, or the like. The memory 1020 may store an operating system and other application programs, and when the technical solution provided by the embodiments of the present specification is implemented by software or firmware, the relevant program codes are stored in the memory 1020 and called to be executed by the processor 1010.
The input/output interface 1030 is used for connecting an input/output module to input and output information. The i/o module may be configured as a component in a device (not shown) or may be external to the device to provide a corresponding function. The input devices may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output devices may include a display, a speaker, a vibrator, an indicator light, etc.
The communication interface 1040 is used for connecting a communication module (not shown in the drawings) to implement communication interaction between the present apparatus and other apparatuses. The communication module can realize communication in a wired mode (for example, USB, network cable, etc.), and can also realize communication in a wireless mode (for example, mobile network, WIFI, bluetooth, etc.).
It should be noted that although the above-mentioned device only shows the processor 1010, the memory 1020, the input/output interface 1030, the communication interface 1040 and the bus 1050, in a specific implementation, the device may also include other components necessary for normal operation. In addition, those skilled in the art will appreciate that the above-described apparatus may also include only the components necessary to implement the embodiments of the present disclosure, and need not include all of the components shown in the figures.
The electronic device of the above embodiment is used to implement the corresponding method for dynamically starting a battery at a low temperature in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
Based on the same inventive concept, corresponding to any of the above embodiments, the present application also provides a computer-readable storage medium storing computer instructions for causing the computer to execute the method for dynamic low-temperature start of a battery according to any of the above embodiments.
Computer-readable media of the present embodiments, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
The computer instructions stored in the storage medium of the foregoing embodiment are used to enable the computer to execute the method for dynamically starting a battery at a low temperature according to any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which are not described herein again.
It should be noted that the embodiments of the present application can be further described in the following ways:
in some embodiments, the central control switch module acquires the current electric quantity of the power battery, and if the current electric quantity of the power battery is less than or equal to 5%, the central control switch module sends display information that the power battery is low in electric quantity and the vehicle cannot be powered on to the instrument; if the current electric quantity of the power battery is larger than 5%, the central control switch module controls the vehicle to execute pure power-on, after the vehicle is electrified, the central control switch module continues to detect the current electric quantity of the power battery, when the current electric quantity of the power battery reaches a fuel battery starting threshold value, a starting request is sent to the fuel control unit, and if the current electric quantity of the power battery does not reach the fuel battery starting threshold value, the current electric quantity of the power battery continues to be detected until the current electric quantity reaches the starting threshold value; then, acquiring the charging power of the power battery and sending the charging power to the fuel control unit; acquiring the requested power of the whole vehicle and the actual output power of the fuel cell, judging whether the emergency load reduction exists in the vehicle, and if not, continuously acquiring the requested power of the whole vehicle and the actual output power of the fuel cell; if the emergency load-reducing signal exists, the emergency load-reducing signal is sent out, the requested heating power of the electric heater is obtained, and the heating power of the electric heater and the charging power of the power battery are controlled according to the requested heating power.
In some embodiments, after receiving the start request sent by the central control switch module, the fuel control unit controls the fuel cell system to start and acquire the charging power of the power battery and the rated power of the electric heater, determines the maximum output power according to the charging power and the rated power, and sends the actual output power to the central control switch module after determining the actual output power.
In some embodiments, the vehicle integration unit determines a requested heating power after receiving the emergency load-shedding signal and transmits the requested heating power to the central control switch module.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the context of the present application, technical features in the above embodiments or in different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the application. Furthermore, devices may be shown in block diagram form in order to avoid obscuring embodiments of the application, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the application are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that the embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures, such as Dynamic RAM (DRAM), may use the discussed embodiments.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalents, improvements, and the like that may be made without departing from the spirit or scope of the embodiments of the present application are intended to be included within the scope of the claims.
Claims (10)
1. A method for dynamic cold-start of a battery, comprising:
if the current electric quantity of the power battery meets the cold start condition of the fuel battery, starting the fuel battery;
determining the maximum output power of the fuel cell and the total vehicle request power of the vehicle;
determining the actual output power of the fuel cell according to the finished automobile request power and the maximum output power;
if the vehicle enters an emergency load reduction state, controlling the power battery to stop discharging, controlling the power battery and the electric heater to perform power consumption on the actual output power, and detecting the temperature of the cooling liquid of the fuel cell in real time;
and if the temperature of the cooling liquid reaches a preset temperature threshold value, finishing the starting of the fuel cell.
2. The method of claim 1, wherein said determining a maximum output power of said fuel cell comprises:
determining the current temperature of the power battery, and determining the charging power of the power battery according to the current temperature;
determining a power rating of the electric heater;
and determining the maximum output power of the fuel cell according to the rated power and the charging power.
3. The method of claim 2, wherein determining the actual output power of the fuel cell based on the vehicle requested power and the maximum output power comprises:
if the requested power of the whole vehicle is smaller than or equal to the rated power, determining the rated power as the actual output power of the fuel cell;
and if the requested power of the whole vehicle is greater than the rated power, determining the maximum output power as the actual output power of the fuel cell.
4. The method of claim 2, wherein the power consumption comprises charging power consumption and heating power consumption, and wherein the controlling the power cell and the electric heater to power consume the actual output power comprises:
determining the required power of the electric heater if the rated power is the actual output power of the fuel cell;
and calculating the difference power of the actual output power and the requested power of the whole vehicle, and determining the heating power consumption and the charging power consumption according to the difference power and the requested power.
5. The method of claim 2, wherein the power consumption comprises charging power consumption and heating power consumption, and wherein the controlling the power battery and the electric heater to power consume the actual output power comprises:
and if the maximum output power is the actual output power of the fuel cell, determining the charging power as the charging power consumption, and determining the rated power as the heating power consumption.
6. The method of claim 4, wherein said determining the heating power consumption from the difference power and the demanded power comprises:
if the required power is larger than or equal to the difference power, determining the required power as the heating power consumption;
and if the required power is smaller than the difference power, determining the difference power as the heating power consumption.
7. The method of claim 1, wherein the vehicle enters an emergency derating state comprising:
detecting the opening degree of a brake pedal of the vehicle in real time;
and if the opening degree is smaller than or equal to a preset opening degree threshold value, determining that the vehicle enters the emergency load-shedding state.
8. A dynamic cold start device for a battery, comprising:
a battery start module configured to: if the current electric quantity of the power battery meets the cold start condition of the fuel battery, starting the fuel battery;
a power confirmation module configured to: determining the maximum output power of the fuel cell and the total vehicle request power of the vehicle;
an output confirmation module configured to: determining the actual output power of the fuel cell according to the finished automobile request power and the maximum output power;
a power consumption module configured to: if the vehicle enters an emergency load reduction state, controlling the power battery to stop discharging, controlling the power battery and the electric heater to perform power consumption on the actual output power, and detecting the temperature of the cooling liquid of the fuel cell in real time;
a state detection module configured to: and if the temperature of the cooling liquid reaches a preset temperature threshold value, the fuel cell is started.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of claims 1 to 7 when executing the program.
10. A vehicle characterized by comprising the electronic device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211512919.XA CN115742878A (en) | 2022-11-25 | 2022-11-25 | Dynamic low-temperature starting method and device of battery, electronic equipment and vehicle |
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| CN202211512919.XA CN115742878A (en) | 2022-11-25 | 2022-11-25 | Dynamic low-temperature starting method and device of battery, electronic equipment and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116512993A (en) * | 2023-06-13 | 2023-08-01 | 中国第一汽车股份有限公司 | Control method and device for fuel cell cold start system, vehicle and medium |
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- 2022-11-25 CN CN202211512919.XA patent/CN115742878A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116512993A (en) * | 2023-06-13 | 2023-08-01 | 中国第一汽车股份有限公司 | Control method and device for fuel cell cold start system, vehicle and medium |
| CN116512993B (en) * | 2023-06-13 | 2024-03-26 | 中国第一汽车股份有限公司 | Control method and device for fuel cell cold start system, vehicle and medium |
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