CN115447559A - Vehicle, method and device for protecting power battery during wading and computer equipment - Google Patents

Vehicle, method and device for protecting power battery during wading and computer equipment Download PDF

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Publication number
CN115447559A
CN115447559A CN202211054123.4A CN202211054123A CN115447559A CN 115447559 A CN115447559 A CN 115447559A CN 202211054123 A CN202211054123 A CN 202211054123A CN 115447559 A CN115447559 A CN 115447559A
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CN
China
Prior art keywords
power battery
power
range
electric quantity
preset
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Pending
Application number
CN202211054123.4A
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Chinese (zh)
Inventor
吴斌峰
刘聪
林飞
熊振坤
洪柳
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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Priority to CN202211054123.4A priority Critical patent/CN115447559A/en
Publication of CN115447559A publication Critical patent/CN115447559A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/087—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2555/00—Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
    • B60W2555/20—Ambient conditions, e.g. wind or rain
    • 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
    • Y02T10/62—Hybrid vehicles
    • 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

Abstract

The application discloses a method and a device for protecting a power battery during vehicle wading, wherein the method for protecting the power battery comprises the steps of obtaining the residual electric quantity of the power battery and controlling the working state of a range extender based on the residual electric quantity of the power battery. The protection device comprises an acquisition module and a controller, wherein the acquisition module is used for acquiring the residual electric quantity of the power battery, and the controller is used for controlling the working state of the range extender based on the residual electric quantity of the power battery. The scheme of the application is simple and efficient, the service life of the power battery is prolonged, and the protection cost of the power battery is reduced when a vehicle wades.

Description

Vehicle, method and device for protecting power battery during wading and computer equipment
Technical Field
The application relates to the technical field of vehicles, in particular to a method and a device for protecting a power battery when a vehicle wades into water, computer equipment and the vehicle.
Background
When the extended-range hybrid vehicle wades, the extended-range device needs to be forcibly started to reduce the water backflow of an engine exhaust system to damage a catalyst and a gasoline engine particle trap, and if the residual electric quantity of a battery is high, the extended-range device is started, the battery can be overcharged, so that the power battery is damaged.
Disclosure of Invention
In view of this, the embodiments of the present application are expected to provide a method, a device, a computer device and a vehicle for protecting a power battery when a vehicle wades, so as to solve the problem of protecting the power battery after a range extender is started when the vehicle wades.
In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:
in a first aspect of the present application, a method for protecting a power battery when a vehicle wades into water is provided, including:
acquiring the residual electric quantity of the power battery;
and controlling the working state of the range extender based on the residual electric quantity of the power battery.
Further, the step of controlling the working state of the range extender based on the residual electric quantity of the power battery specifically comprises the following steps:
when the residual electric quantity of the power battery is smaller than a first preset value, controlling the range extender to charge the power battery;
and when the residual electric quantity of the power battery is larger than the first preset value, acquiring the temperature of the generator of the range extender, and controlling the working state of the range extender based on the temperature.
Further, the step of controlling the operating state of the range extender based on the temperature specifically includes:
when the temperature is lower than a first preset temperature, the generator is controlled not to generate electricity outwards, and the energy of the generator is consumed by the generator through heating;
and when the temperature is higher than the first preset temperature, controlling the generator to generate power for the vehicle load.
Further, before the step of obtaining the residual capacity of the power battery, the protection method comprises the following steps:
acquiring the wading depth of the vehicle;
and if the wading depth reaches a first preset depth, starting the range extender.
Further, the step of controlling the working state of the range extender based on the residual electric quantity of the power battery specifically comprises:
when the residual electric quantity of the power battery is in a first preset range, controlling the range extender to charge the power battery with first power;
and when the residual electric quantity of the power battery is in a second preset range, controlling the range extender to charge the power battery with second power, wherein the first power is greater than the second power, and the maximum value of the first preset range is smaller than the minimum value of the second preset range.
Further, if the residual capacity of the power battery is increased from the first preset range to a range between the first preset range and the second preset range, the range extender is controlled to charge the power battery with the first power;
and if the residual electric quantity of the power battery is reduced to a range between the first preset range and the second preset range from the second preset range, controlling the range extender to charge the power battery with the second power.
In a second aspect of the present application, there is provided a protection device for a power battery when a vehicle is waded, including:
the acquisition module is used for acquiring the residual electric quantity of the power battery;
and the controller is used for controlling the working state of the range extender based on the residual electric quantity of the power battery.
Further, the protection device further comprises:
the temperature sensor is used for acquiring the temperature of the generator; and/or the presence of a gas in the gas,
and the wading sensing system is used for acquiring the wading depth of the vehicle.
In a third aspect of the application, a computer device is provided, comprising one or more processing modules configured to execute computer instructions stored in a memory unit to perform the above-described protection method.
In a fourth aspect of the present application, there is provided a vehicle including the above-described protection apparatus; and/or the computer device described above.
According to the protection method and device for the power battery during vehicle wading, the residual electric quantity of the power battery is obtained through the obtaining module, and the working state of the range extender is controlled through the controller based on the residual electric quantity of the power battery. The scheme of the application is simple and efficient, the service life of the power battery is prolonged, and the protection cost of the power battery is reduced when a vehicle wades.
Drawings
Fig. 1 is a schematic flow chart of a method for protecting a power battery when a vehicle wades in water according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of another method for protecting a power battery when a vehicle wades in water according to the embodiment of the present application.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
The present application will be described in further detail with reference to the following drawings and specific embodiments. The descriptions of "first," "second," etc. in the embodiments of the present application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including at least one feature. In the description of the embodiments of the present application, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The range-extended vehicle is an electric vehicle which is characterized in that an engine is additionally arranged on the basis of a pure electric vehicle to charge a power battery or directly drive a motor to increase the endurance mileage, so that the defect of short driving mileage of the pure electric vehicle is overcome. Compared with a pure electric vehicle, the main difference is the range extender, namely the range extender comprises an engine and a generator. Regardless of the parking and charging process, the extended range vehicle includes a purely electric mode and an extended range mode. The pure electric mode refers to that the power battery supplies energy to drive the battery to supply power. The range extending mode refers to that the residual electric quantity of the battery is gradually reduced along with the running of the vehicle in the pure electric mode, when the residual electric quantity of the battery is lower than a set threshold value, if the battery is used again, the service life of the battery is reduced, at the moment, the range extending device is started, the electric energy sent by the range extending device is used for driving the motor to run, meanwhile, the redundant electric energy is used for charging the battery, and the residual electric quantity of the battery is increased to the set threshold value. When a vehicle wades, the range extender needs to be forcibly started to reduce the damage of a catalyst and a gasoline engine particle trap caused by water backflow of an engine exhaust system, the power battery can be charged by the generator after the range extender is started, and if the residual electric quantity of the battery is high, the battery can be overcharged, so that the power battery is damaged.
In view of the above, referring to fig. 1, a first aspect of the embodiments of the present application provides a method for protecting a power battery when a vehicle wades into water, including:
s1, acquiring the residual electric quantity of the power battery;
and S2, controlling the working state of the range extender based on the residual electric quantity of the power battery.
According to the method for protecting the power battery when the vehicle wades, the working state of the range extender is controlled by obtaining the residual electric quantity of the power battery, the residual electric quantity of the power battery is maintained in a safety interval under the condition that the range extender is forcibly started when the vehicle wades, the service life of the power battery is prolonged, and the protection cost of the power battery when the vehicle wades is reduced.
The following describes the control method according to the embodiment of the present application in detail with reference to specific embodiments.
S1, acquiring the residual electric quantity of the power battery.
In this step, the remaining power of the power battery refers to SOC (state of charge), i.e., the state of charge of the battery. The residual capacity of the power Battery can be obtained by an open-circuit voltage method, an ampere-hour integration method, an internal resistance method, a neural network and a kalman filtering method or can be directly detected by a Battery Management System (BMS). For example, the remaining capacity of the battery is estimated by accumulating the amount of charge or discharge while the power battery is being charged or discharged by the ampere-hour integration method. The method for displaying the remaining power of the power battery is not limited, and may be needle type, led lamp display or electronic display. For example, the power is displayed by the pointer, and the pointer indicates that the power is sufficient in the green area, insufficient power in the yellow area, and no power in the red area, so that the driver cannot continue driving.
And S2, controlling the working state of the range extender based on the residual electric quantity of the power battery.
In this step, the "working state" refers to the selection of different working modes after the range extender is started, that is, the working modes of the range extender under different working conditions during the working process are switched according to different residual capacities of the power battery. The range extender may be controlled by a GCU (Generator Control Unit), an ECU (Electronic Control Unit), or the like.
In one embodiment, the step of controlling the operating state of the range extender based on the remaining power of the power battery specifically includes: when the residual electric quantity of the power battery is smaller than a first preset value, controlling the range extender to charge the power battery; and when the residual electric quantity of the power battery is greater than a first preset value, acquiring the temperature of a generator of the range extender, and controlling the working state of the range extender based on the temperature.
The first preset value is determined according to the type of the power battery, and the power battery can be a ternary lithium battery or a lithium iron phosphate battery, and exemplarily, the power battery is a ternary lithium battery, and compared with the lithium iron phosphate battery, the power battery has the advantages of good low-temperature discharge performance, high energy density and high charging efficiency. Specifically, the first preset value is 90% ± 5%, and when the power battery is smaller than the first preset value, charging does not affect the service life of the power battery. When the power battery is larger than the first preset value, the temperature of the generator of the range extender is obtained, and the working state of the range extender is controlled according to the temperature so as to achieve the purpose of not charging the power battery or consuming power of the power battery, so that the over-charging condition of the power battery is reduced, and the service life of the power battery is prolonged.
The method for obtaining the temperature of the generator of the range extender is not limited, and the temperature may be measured by a temperature sensor, or may be measured by an embedded thermometer method, a resistance method, or the like, and specifically, the temperature of the generator of the range extender is obtained by the embedded thermometer method. During assembly of the generator, the temperature detectors are often embedded at points where it is estimated that higher temperatures are possible. The temperature detector can be a resistance temperature detector, a thermocouple, a semiconductor temperature detector or the like, the temperature detector is used as a temperature sensing element, and the obtained temperature signal is transmitted to an external supporting instrument, namely a vehicle-mounted display through a lead so as to display the temperature of the detected element.
In one embodiment, the step of controlling the operating state of the range extender based on the temperature specifically includes: when the temperature is lower than the first preset temperature, the generator is controlled not to generate electricity outwards, and the energy of the generator is consumed by the generator; and when the temperature is higher than the first preset temperature, controlling the generator to generate power for the vehicle load.
It is understood that not externally generating power refers to not charging the power battery or providing electrical power to the vehicle load, etc. Illustratively, when the temperature is lower than the first preset temperature, the GCU controls the generator to disconnect the switch of the power supply circuit connected with the power battery or the vehicle load, and the energy of the generator is consumed by the self internal resistance heating.
The first preset temperature is a protection temperature of the generator, namely a limit temperature for maintaining the normal operation of the generator. It can be understood that if the first preset temperature is higher than the limit temperature of the normal operation of the generator, the power of the generator is reduced, the tendency of pre-ignition and deflagration is increased, and the service life of the generator is shortened. The power generation to the vehicle load can be PTC heating, vehicle-mounted sound playing or vehicle-mounted air conditioning refrigeration and the like. It will be appreciated that control of the generator is achieved by the GCU. The generator is controlled to generate power without external power, so that the self heating energy consumption of the generator is realized, the energy shunt of the generator to the vehicle load power generation is realized, and the purpose of not charging the power battery is achieved by consuming the energy of the generator. Therefore, the overcharge of the power battery caused by the starting of the range extender is reduced by controlling the energy flow of the generator of the range extender, and the method is simple to operate and easy to realize.
In one embodiment, the first preset temperature is 138-142 ℃, specifically, the first preset temperature is 140 ℃, and if the first preset temperature is too low, the generator controls to generate power for the vehicle load when the first preset temperature does not reach the limit temperature, so that the control efficiency is reduced; if the first preset temperature is too high, the generator may be damaged due to overheating, and the service life is shortened.
In one embodiment, before the step of obtaining the remaining capacity of the power battery, the protection method includes: acquiring the wading depth of the vehicle; if the wading depth reaches the first preset depth, the range extender is started.
The wading depth of the vehicle may be obtained in a variety of ways. For example, the measurement may be performed by a wading sensing system installed in the vehicle, which may include a water level sensor to collect the water level; or the wading sensing system can comprise an ultrasonic sensor, and the distance of ultrasonic waves reflected by the water surface is monitored, so that the wading depth is calculated. It will be appreciated that the water flow is fluctuating when the vehicle is wading, and the first predetermined depth may not be set to exceed the height of the vehicle air intake and exhaust, and may for example be 80% of the height of the vehicle air intake and exhaust (with reference to the lower air intake and exhaust positions), with a margin being left to reduce the risk of water flow floating into the air intake or exhaust. Therefore, after the wading depth reaches the first preset depth, the range extender is started to reduce the water backflow of an engine exhaust system to damage a catalyst and a gasoline engine particle trap, and the driving safety is protected.
In one embodiment, the step of controlling the operating state of the range extender based on the remaining power of the power battery specifically includes: when the residual electric quantity of the power battery is in a first preset range, controlling the range extender to charge the power battery with first power; and when the residual electric quantity of the power battery is in a second preset range, controlling the range extender to charge the power battery with second power, wherein the first power is greater than the second power, and the maximum value of the first preset range is smaller than the minimum value of the second preset range. It will be appreciated that controlling range extender power refers to controlling the power of the engine of the range extender. The second preset value is determined according to the type of the power battery, specifically, the first preset range is that the residual capacity of the power battery is less than or equal to 90%, and the second preset range is that the residual capacity of the power battery is greater than or equal to 95%. The difference is that whether the generator generates electricity externally is controlled according to the residual electric quantity of the power battery in the above embodiment, and the charging rate of the power battery is controlled by controlling the power of the engine according to the residual electric quantity of the power battery in the embodiment. It can be understood that when the remaining capacity of the power battery is in the second preset range, the vehicle runs by controlling the engine power to be in a lower value to charge slowly, for example, when the engine torque is 21Nm, the engine speed is 1600rpm, the second power is 3.5kW, and the power consumption of the vehicle is greater than or equal to the charging capacity to protect the power battery. When the residual capacity of the power battery is in a first preset range, the engine power is controlled to be in a larger value to rapidly charge, for example, the engine torque is 80Nm, the engine speed is 1600rpm, the first power is 13.4kW, and the power consumption of the vehicle running is smaller than the charging capacity so as to improve the residual capacity of the power battery. Therefore, by controlling the power of the engine, the power is increased when the electric quantity is small, and the power is reduced when the electric quantity is large, so that the charging efficiency of the engine on the power battery is flexibly completed, and the influence of long-time charging on the power battery is reduced.
In one embodiment, if the residual electric quantity of the power battery is increased from a first preset range to a range between the first preset range and a second preset range, the range extender is controlled to charge the power battery with a first power; and if the residual electric quantity of the power battery is reduced to be between the first preset range and the second preset range from the second preset range, controlling the range extender to charge the power battery with second power. Specifically, the first preset range is that the residual capacity of the power battery is less than or equal to 90%, the second preset range is that the residual capacity of the power battery is greater than or equal to 95%, and the distance between the first preset range and the second preset range is 90% -95%. On one hand, when the residual capacity of the power battery is increased from below 90% to between 90% and 95%, the power battery can be rapidly charged while being protected by controlling the charging power of the engine to be the first power; on the other hand, when the residual capacity of the power battery is reduced to 90% -95% from more than 95%, the charging power of the engine is controlled to be the second power, so that the problems of Noise, vibration and Harshness (NVH) caused by switching the working conditions of the engine, namely the second power is changed into the first power are avoided, and the user experience is improved.
In one embodiment, after the step of controlling the working state of the range extender based on the residual electric quantity of the power battery, the protection method comprises the following steps: acquiring the wading depth of the vehicle; and if the wading depth is reduced to be below the first preset depth and lasts for a preset time, closing the range extender. The preset time is used for judging whether the vehicle is separated from a wading working condition, and specifically, the preset time can be 1min. Therefore, the range extender is closed in time when the vehicle is separated from the wading working condition, the energy is saved, the power battery is protected, and the overcharge phenomenon is reduced.
Specifically, referring to fig. 2, the first preset value is 90%, and the first preset temperature is 140 ℃. It will be appreciated that "start" may refer to the step of activating the range extender when the vehicle wades to a first predetermined depth. When the vehicle wades, the remaining capacity of the power battery is judged, if the remaining capacity of the power battery is smaller than 90%, the range extender is controlled to charge the power battery, and if the remaining capacity of the power battery is larger than 90%, the temperature of the generator is judged. When the temperature of the generator is less than or equal to 140 ℃, the generator is controlled not to generate electricity outwards, and the energy of the generator is consumed by the generator; when the temperature of the generator is higher than 140 ℃, the vehicle load is started, and the energy of the generator is consumed. It can be understood that the judgment of the residual electric quantity of the power battery is a real-time dynamic process, and the above process is continuously repeated when the vehicle wades into water. And finishing the execution of the process only when the residual electric quantity of the power battery is greater than 90% and the vehicle is out of the wading working condition. Therefore, the driving time is prolonged while the power battery is protected, and the driving experience of a user is improved.
In a second aspect of the embodiments of the present application, a protection device for a power battery when a vehicle wades into water is provided, which includes an obtaining module and a controller.
The obtaining module is used for obtaining the remaining capacity of the power battery, for example, the obtaining module may be a BMS, for the calculation of the SOC, in an embedded code of the actual BMS, a correction coefficient is added to correct the ampere-hour integral by correcting the ampere-hour integral plus an OCV (open circuit voltage), if the OCV condition is not satisfied, the ampere-hour integral is corrected, so as to achieve a more accurate SOC, in an actual algorithm of the SOC, the core is not the ampere-hour integral, but the SOC correction method under each working condition, the more working conditions the correction method covers, the higher the accuracy of the SOC is.
The controller is used for controlling the working state of the range extender based on the residual electric quantity of the power battery. The controller can be a GCU or an ECU, and when the controller is the GCU, the working state of the generator is directly controlled after the residual electric quantity information of the power battery is received; when the controller is an ECU, the GCU or the engine is controlled by the ECU so as to indirectly control the working state of the range extender.
In one embodiment, the protection device further comprises a temperature sensor and a wading sensing system. The temperature sensor is used for obtaining the temperature of the generator, and the wading sensing system is used for obtaining the wading depth of the vehicle. The wading sensing system is not limited in form, and can be a water level sensor, an ultrasonic sensor, a laser sensor or the like. For example, an ultrasonic sensor is mounted on a rearview mirror of a vehicle, the distance reflected by the water surface is sent to a controller by using ultrasonic ranging, and the controller determines the wading depth of the vehicle by combining vehicle attitude data. Or when the wading sensing system is a water level sensor, the water level sensor is installed at a threshold height, for example, the height is lower than the height of an air inlet and an air outlet of an engine, when the wading of the vehicle reaches the threshold height, the water level sensor transmits a water level signal to the controller, and the controller controls the range extender to start and controls the working state of the range extender based on the residual electric quantity of the power battery.
In one embodiment, the controller further comprises a display module to display the wading depth of the vehicle. The display module is in signal connection with the wading sensing system, and wading depth is displayed after the wading sensing system signals are acquired. The display module is not limited in kind, and may be a display, a dashboard, or the like.
In a third aspect of the embodiments of the present application, a computer device is provided, which includes one or more processing modules configured to execute computer instructions stored in a storage module to perform any one of the protection methods of the present application. The computer device may be the controller of the above embodiment.
In one embodiment, an embodiment of the present application provides a computer system, including: a programmable circuit; and software encoded on at least one computer readable medium for programming a programmable circuit to implement any of the protection methods of the present application. The computer apparatus mounts the computer system.
In one embodiment, the present application provides a computer-readable medium having computer-readable instructions thereon, which when executed by a computer, cause the computer to perform all the steps of any one of the protection methods of the present application. The computer readable medium may be one or more. The computer device described above is configured with the computer-readable medium.
In a fourth aspect of the embodiments of the present application, there is provided a vehicle including any one of the above-described protection devices; and/or the computer device described above.
It is understood that the vehicle is an extended range vehicle, and may be an automobile, an electric motorcycle, an electric bicycle, or the like.
The above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and it is obvious to those skilled in the art that various modifications and variations can be made in the present application. All changes, equivalents, modifications and the like which come within the spirit and principle of the application are intended to be embraced therein.

Claims (10)

1. A method for protecting a power battery when a vehicle wades into water is characterized by comprising the following steps:
acquiring the residual electric quantity of the power battery;
and controlling the working state of the range extender based on the residual electric quantity of the power battery.
2. The protection method according to claim 1, wherein the step of controlling the working state of the range extender based on the power battery residual electric quantity specifically comprises:
when the residual electric quantity of the power battery is smaller than a first preset value, controlling the range extender to charge the power battery;
when the residual electric quantity of the power battery is larger than the first preset value, the temperature of the generator of the range extender is obtained, and the working state of the range extender is controlled based on the temperature.
3. The protection method according to claim 2, wherein the step of controlling the operating state of the range extender based on the temperature specifically includes:
when the temperature is lower than a first preset temperature, the generator is controlled not to generate electricity outwards, and the energy of the generator is consumed by the generator through heating;
and when the temperature is higher than the first preset temperature, controlling the generator to generate power for the vehicle load.
4. The protection method according to claim 1, characterized in that before the step of obtaining the residual capacity of the power battery, the protection method comprises:
acquiring the wading depth of the vehicle;
and if the wading depth reaches a first preset depth, starting the range extender.
5. The protection method according to claim 1, wherein the step of controlling the working state of the range extender based on the power battery residual electric quantity specifically comprises:
when the residual electric quantity of the power battery is in a first preset range, controlling the range extender to charge the power battery with first power;
and when the residual electric quantity of the power battery is in a second preset range, controlling the range extender to charge the power battery with second power, wherein the first power is greater than the second power, and the maximum value of the first preset range is smaller than the minimum value of the second preset range.
6. The protection method according to claim 5, wherein if the remaining capacity of the power battery rises from the first preset range to a range between the first preset range and the second preset range, the range extender is controlled to charge the power battery with the first power;
and if the residual electric quantity of the power battery is reduced to a range between the first preset range and the second preset range from the second preset range, controlling the range extender to charge the power battery with the second power.
7. A protection device of a power battery when a vehicle wades, characterized by comprising:
the acquisition module is used for acquiring the residual electric quantity of the power battery;
and the controller is used for controlling the working state of the range extender based on the residual electric quantity of the power battery.
8. The protection device of claim 7, further comprising:
the temperature sensor is used for acquiring the temperature of the generator; and/or the presence of a gas in the gas,
and the wading sensing system is used for acquiring the wading depth of the vehicle.
9. A computer device comprising one or more processing modules configured to execute computer instructions stored in a memory unit to perform the protection method of any one of claims 1 to 6.
10. A vehicle characterized by comprising the protection device of any one of claims 7 to 8; and/or, the computer device of claim 9.
CN202211054123.4A 2022-08-31 2022-08-31 Vehicle, method and device for protecting power battery during wading and computer equipment Pending CN115447559A (en)

Priority Applications (1)

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CN202211054123.4A CN115447559A (en) 2022-08-31 2022-08-31 Vehicle, method and device for protecting power battery during wading and computer equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211054123.4A CN115447559A (en) 2022-08-31 2022-08-31 Vehicle, method and device for protecting power battery during wading and computer equipment

Publications (1)

Publication Number Publication Date
CN115447559A true CN115447559A (en) 2022-12-09

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CN202211054123.4A Pending CN115447559A (en) 2022-08-31 2022-08-31 Vehicle, method and device for protecting power battery during wading and computer equipment

Country Status (1)

Country Link
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