CN113002364A - Battery charging cut-off state of charge determination method, device, electronic device, and medium - Google Patents
Battery charging cut-off state of charge determination method, device, electronic device, and medium Download PDFInfo
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- CN113002364A CN113002364A CN202110435946.0A CN202110435946A CN113002364A CN 113002364 A CN113002364 A CN 113002364A CN 202110435946 A CN202110435946 A CN 202110435946A CN 113002364 A CN113002364 A CN 113002364A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
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Abstract
The embodiment of the invention discloses a method and a device for determining a battery charging cut-off charge state, electronic equipment and a medium. The battery charge cut-off state of charge determination method includes: acquiring a first real-time temperature of an environment where a battery of a vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged; calculating a temperature difference value of the vehicle in the charging process according to the first real-time temperature and the second real-time temperature; determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and the air temperature prediction curve; the cutoff state of charge of the battery during this charging is determined based on the highest ambient temperature and the lowest ambient temperature experienced by the battery. The technical scheme of the embodiment of the invention can slow down the attenuation of the service life of the battery and prolong the service life of the battery.
Description
Technical Field
The embodiment of the invention relates to the technical field of energy automobiles, in particular to a method and a device for determining a battery charging cut-off charge state, electronic equipment and a medium.
Background
SOC (State of Charge), the state of charge of the battery. SOC represents the ratio of the remaining capacity to the total available capacity of the battery after use or long-term storage for a period of time. When the battery is charged, whether the charging should be stopped or not needs to be determined according to the real-time SOC value of the battery so as to ensure that the battery is fully charged as much as possible and avoid overcharging the battery. However, different battery temperatures can have an effect on the SOC value when the battery is fully charged, such as: at too high or too low a temperature, the battery life will be reduced if the battery is fully charged.
The prior art has adopted a method of charging the battery only at a suitable ambient temperature. However, the prior art does not consider that when the battery is not thermally managed any more after the charging is finished, the temperature of the battery will increase or decrease with the ambient temperature, and if the temperature of the battery rises or decreases to an excessively high or excessively low temperature, the battery in a fully charged state will have a reduced service life due to overcharging at the excessively high or excessively low temperature.
Therefore, how to prevent the battery from overcharging at low temperature or high temperature and reduce the service life of the battery is a technical problem to be solved at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining a battery charge cut-off state of charge, electronic equipment and a medium, which can slow down the decay of the service life of a battery and prolong the service life of the battery.
In a first aspect, an embodiment of the present invention provides a method for determining a battery charge cut-off state of charge, where the method includes:
acquiring a first real-time temperature of an environment where a battery of a vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged;
calculating a temperature difference value of the vehicle in a charging process according to the first real-time temperature and the second real-time temperature;
determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and an air temperature prediction curve;
determining a cutoff state of charge of the battery during this charging based on the highest ambient temperature and the lowest ambient temperature experienced by the battery.
Optionally, determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and the air temperature prediction curve includes:
and when the variation amplitude of the temperature difference value is stabilized within a preset temperature within a preset time, determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve.
Optionally, determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and the air temperature prediction curve includes:
and determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference when the state of charge of the battery reaches the threshold state of charge and the air temperature prediction curve.
Optionally, determining a cut-off state of charge of the battery during the charging process based on the maximum ambient temperature and the minimum ambient temperature experienced by the battery includes:
and determining a first cut-off charge state of the highest ambient temperature and a second cut-off charge state of the lowest ambient temperature based on the highest ambient temperature and the lowest ambient temperature experienced by the battery and a charge cut-off charge state curve, and taking the minimum value of the first cut-off charge state and the second cut-off charge state as the cut-off charge state of the battery in the charging process.
Optionally, before obtaining a first real-time temperature of an environment where a battery of the vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged, the method further includes:
and acquiring the charge cut-off state of charge curve.
Optionally, after determining the cut-off state of charge of the battery in the charging process based on the maximum ambient temperature and the minimum ambient temperature experienced by the battery, the method further includes:
calculating the state of charge of the battery in real time;
stopping charging when the state of charge of the battery is equal to the cutoff state of charge.
Optionally, the method further includes:
and when the state of charge of the battery is not equal to the cut-off state of charge, continuing charging.
In a second aspect, an embodiment of the present invention further provides a battery charge-up end state of charge determination apparatus, including:
the temperature acquisition module is used for acquiring a first real-time temperature of an environment where a battery is located in the charging process of the vehicle and a second real-time temperature of a weather forecast of an area where the vehicle is charged;
the difference value determining module is used for calculating a temperature difference value of the vehicle in the charging process according to the first real-time temperature and the second real-time temperature;
the temperature determination module is used for determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve;
a cutoff state of charge determination module to determine a cutoff state of charge of the battery during the charging based on the highest ambient temperature and the lowest ambient temperature experienced by the battery.
In a third aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the battery cut-off state of charge determination method provided by any of the embodiments of the present invention.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for determining a state of charge of a battery according to any of the embodiments of the present invention.
According to the technical scheme provided by the embodiment of the invention, the difference value between the ambient temperature and the weather forecast real-time temperature of the area where the vehicle is located is calculated by obtaining the ambient temperature when the battery is charged, and the difference value is calculated until the difference value is kept unchanged in the preset time, the highest ambient temperature and the lowest ambient temperature which the battery may experience in one day can be predicted based on the difference value and the air temperature prediction curve, then the battery charging cut-off charge state is determined based on the highest ambient temperature and the lowest ambient temperature which the battery may experience after being charged, the battery is prevented from being overcharged at low temperature or high temperature, the service life of the battery is prevented from being reduced, and the service life of the battery is prolonged. The method for determining the battery charge cut-off state of charge provided by the embodiment has positive and important significance for prolonging the service life of the new energy automobile power battery.
Drawings
Fig. 1 is a flowchart of a method for determining a battery charge cut-off state of charge according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for determining a battery charge cut-off state of charge according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery charge cut-off state of charge determination apparatus according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for determining a battery charge cut-off state of charge according to an embodiment of the present invention, which is applicable to a case of determining a battery charge cut-off state of charge. The method may be performed by the battery charge cut-off state of charge determining apparatus provided in the embodiment of the present invention, and the apparatus may be implemented by software and/or hardware, and the apparatus may be integrated on an electronic device, for example, a battery management system.
Referring to fig. 1, the method for determining a charge cut-off state of charge of a battery according to an embodiment of the present invention includes the steps of:
s110, acquiring a first real-time temperature of an environment where a battery of the vehicle is located in the charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged.
The first real-time temperature, that is, the ambient temperature of a small area where the vehicle is located, may be obtained by, for example, an ambient temperature sensor mounted on the vehicle. The second real-time temperature, that is, an environmental temperature of a large environment in which the vehicle is located, that is, an environmental temperature at this time in the weather forecast, may be obtained in real time by, for example, a Telematics BOX (T-BOX), that is, the second real-time temperature of the weather forecast in an area in which the vehicle is charged.
For example, when the vehicle is in the garage, the environment temperature of the garage is different from the environment temperature of the outside, for example, the temperature of the garage (a small area where the vehicle is located) is 10 ℃ (first real-time temperature), and the environment temperature of the outside (a large environment where the vehicle is located) is 15 ℃ (second real-time temperature). For another example, when the vehicle is exposed to sunlight, the temperature of the area where the vehicle is located is generally higher than the ambient temperature of other areas, for example, the ambient temperature around the vehicle (a small area where the vehicle is located) is 20 ℃ (first real-time temperature), and the ambient temperature of other areas (a large environment where the vehicle is located) is 15 ℃ (second real-time temperature).
And S120, calculating a temperature difference value of the vehicle in the charging process according to the first real-time temperature and the second real-time temperature.
Calculating a temperature difference between the first real-time temperature and the second real-time temperature in real time until the temperature difference between the first real-time temperature and the second real-time temperature remains substantially constant for a period of time. The time period may be set in an actual situation, and this embodiment is not limited. When the temperature difference between the first real-time temperature and the second real-time temperature is kept constant in a period of time, the position where the vehicle is located is not changed, and then the temperature is basically kept constant, namely the temperature of a small area where the vehicle is located is in balance with the temperature of the large environment where the vehicle is located.
And S130, determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and the air temperature prediction curve.
The air temperature prediction curve may be, for example, an ambient temperature of a large environment in which the vehicle is located in a day predicted in weather forecast.
Specifically, after the temperature difference is determined, the maximum ambient temperature and the minimum ambient temperature experienced by the battery during the day may be predicted from the temperature difference and an air temperature prediction curve (predicted temperature values for each time period of the large environment in which the vehicle is located).
For example, when the vehicle is in a sleep state, in which the first and second real-time temperatures cannot be monitored, since the difference between the first and second real-time temperatures has been determined in step S120, the maximum and minimum ambient temperatures that the battery may experience may be calculated based on the air temperature prediction curve and the difference.
And S140, determining the cut-off charge state of the battery in the charging process based on the highest ambient temperature and the lowest ambient temperature experienced by the battery.
After the highest ambient temperature and the lowest ambient temperature which the battery may experience are determined, if the lowest ambient temperature or the highest ambient temperature is not within the suitable temperature range, the battery is not fully charged during the charging process, but corresponds to a charge state, i.e., a cut-off charge state, for example, the charge state is 100% when the battery is fully charged, and the cut-off charge state is 99% at this time, so that the problem that the service life of the battery is reduced due to overcharging at an excessively high temperature or an excessively low temperature of the battery in the fully charged state can be avoided.
Optionally, determining the cut-off state of charge of the battery during the charging process based on the highest ambient temperature and the lowest ambient temperature experienced by the battery includes:
and determining a first cut-off charge state of the highest ambient temperature and a second cut-off charge state of the lowest ambient temperature based on the highest ambient temperature and the lowest ambient temperature experienced by the battery and the charge cut-off charge state curve, and taking the minimum value of the first cut-off charge state and the second cut-off charge state as the cut-off charge state of the battery in the charging process.
The charge cut-off state of charge curve is a corresponding relationship between different temperatures experienced by the battery and the battery charge cut-off state of charge (SOH) of the battery, that is, when the temperatures experienced by the battery are different, the corresponding battery charge cut-off states of charge are different.
Specifically, after the maximum ambient temperature experienced by the battery is determined, a cut-off state of charge (first cut-off state of charge) corresponding to the maximum ambient temperature may be determined based on the charge cut-off state of charge curve; also, after the lowest ambient temperature experienced by the battery is determined, a cutoff state of charge (second cutoff state of charge) corresponding to the lowest ambient temperature may be determined based on the charge cutoff state of charge curve. And comparing the first cut-off charge state with the second cut-off charge state, and taking the minimum value of the first cut-off charge state and the second cut-off charge state as the cut-off charge state of the battery in the charging process. Illustratively, the first cut-off state of charge is 98%, and the second cut-off state of charge is 99%, then the first cut-off state of charge is taken as the cut-off state of charge of the battery during the charging process, i.e., when the state of charge of the battery reaches 98%, the charging is stopped, and the battery is not fully charged (the state of charge is 100%).
On the basis of the above scheme, optionally, before obtaining a first real-time temperature of an environment where a battery of the vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged, the method further includes:
and acquiring a charge cut-off charge state curve.
The charge cut-off state of charge curve may be determined, for example, by fitting or experimentally. It is understood that the charge cut-off state of charge curve includes, but is not limited to, fitting or experimental means as long as the charge cut-off state of charge curve can be obtained.
According to the technical scheme provided by the embodiment of the invention, the difference value between the ambient temperature and the weather forecast real-time temperature of the area where the vehicle is located is calculated by obtaining the ambient temperature when the battery is charged, and the difference value is calculated until the difference value is kept unchanged in the preset time, the highest ambient temperature and the lowest ambient temperature which the battery may experience in one day can be predicted based on the difference value and the air temperature prediction curve, then the battery charging cut-off charge state is determined based on the highest ambient temperature and the lowest ambient temperature which the battery may experience after being charged, the battery is prevented from being overcharged at low temperature or high temperature, the service life of the battery is prevented from being reduced, and the service life of the battery is prolonged. The method for determining the battery charge cut-off state of charge provided by the embodiment has positive and important significance for prolonging the service life of the new energy automobile power battery.
Example two
Fig. 2 is a flowchart of a method for determining a battery charge cut-off state of charge according to a second embodiment of the present invention. The present embodiment is optimized based on the above technical solutions. The same or corresponding terms as those in the above embodiments are not explained in detail herein.
Referring to fig. 2, the method of the present embodiment may specifically include the following steps:
s210, acquiring a first real-time temperature of an environment where a battery of the vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged.
And S220, calculating a temperature difference value of the vehicle in the charging process according to the first real-time temperature and the second real-time temperature.
S230, when the variation amplitude of the temperature difference value is stabilized within a preset temperature within a preset time, determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve; alternatively, the maximum and minimum ambient temperatures experienced by the battery are determined based on the temperature difference at which the state of charge of the battery reaches the threshold state of charge and the air temperature prediction curve.
The temperature difference value variation range is the variation of the temperature difference value of the first real-time temperature and the second real-time temperature at different moments in a preset time. The preset temperature may be, for example, 1 ℃.
Illustratively, within the preset time, at the first moment, the first real-time temperature is 15 ℃ and the second real-time temperature is 10 ℃, that is, the temperature difference between the first real-time temperature and the second real-time temperature is 5 ℃ at the first moment; at the second moment, the first real-time temperature is 16 ℃, the second real-time temperature is 11 ℃, namely, the temperature difference between the first real-time temperature and the second real-time temperature is 5 ℃ at the second moment; at the third moment, the first real-time temperature is 20 ℃, the second real-time temperature is 15 ℃, namely, the temperature difference between the first real-time temperature and the second real-time temperature is 5 ℃; .... In this case, the variation range of the temperature difference from the first time to the second time is stabilized at 0 ℃ and less than 1 ℃, and the variation range of the temperature difference from the second time to the third time is stabilized at 0 ℃ and less than 1 ℃, that is, the variation range of the temperature difference is stabilized at the preset temperature within the preset time, so that the ambient temperature around the vehicle and the ambient temperature around the vehicle are in a balanced state, and the temperature difference is also substantially kept unchanged in the subsequent time period, for example, the temperature difference is always 5 ℃, and then the temperature difference is stored. In this way, even if the vehicle enters the sleep state and the first real-time temperature and the second real-time temperature cannot be monitored, the ambient temperature around the vehicle during the day can be determined based on the temperature difference, for example, 5 ℃, and the air temperature prediction curve, and the maximum ambient temperature and the minimum ambient temperature experienced by the battery can be determined.
The threshold state of charge may be, for example, 95%, i.e., the amount of charge charged to the battery has a threshold value of 95%, which indicates that the charge time of the battery is long enough to keep the ambient temperature around the vehicle in equilibrium with the ambient temperature around the vehicle. And then calculating the temperature difference value of the first real-time temperature and the second real-time temperature at the moment, and determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve.
S240, determining a first cut-off charge state of the highest ambient temperature and a second cut-off charge state of the lowest ambient temperature based on the highest ambient temperature and the lowest ambient temperature experienced by the battery and the charge cut-off charge state curve, and taking the minimum value of the first cut-off charge state and the second cut-off charge state as the cut-off charge state of the battery in the charging process.
And S250, calculating the charge state of the battery in real time.
S260, when the state of charge of the battery is equal to the cut-off state of charge, the step S270 is executed; when the state of charge of the battery is not equal to the cut-off state of charge, the charging is continued, and the process proceeds to step S250.
And S270, stopping charging.
Specifically, after the cut-off charge state of the battery in the charging process is determined, the charge state of the battery is calculated in real time, whether the charge state of the battery is equal to the cut-off charge state or not is calculated, and if the charge state of the battery is equal to the cut-off charge state, the charging is stopped; if the state of charge of the battery is not equal to the cutoff state of charge, it indicates that the battery may continue to be charged until the charging is stopped when the state of charge of the battery is equal to the cutoff state of charge.
Illustratively, when the cutoff state of charge of the battery during the charging process is 98% based on the determination of step S240, the state of charge of the battery is calculated in real time, and if the calculated state of charge of the battery is equal to 98%, the charging is stopped; if the calculated state of charge of the battery is less than 98%, the charging is continued until the calculated state of charge of the battery is equal to 98%.
According to the technical scheme provided by the embodiment of the invention, the difference value between the ambient temperature and the weather forecast real-time temperature of the area where the vehicle is located is calculated by obtaining the ambient temperature when the battery is charged, and the difference value is calculated until the difference value is kept unchanged in the preset time, the highest ambient temperature and the lowest ambient temperature which the battery may experience in one day can be predicted based on the difference value and the air temperature prediction curve, then the battery charging cut-off charge state is determined based on the highest ambient temperature and the lowest ambient temperature which the battery may experience after being charged, the battery is prevented from being overcharged at low temperature or high temperature, the service life of the battery is prevented from being reduced, and the service life of the battery is prolonged. The method for determining the battery charge cut-off state of charge provided by the embodiment has positive and important significance for prolonging the service life of the new energy automobile power battery.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a battery cut-off state of charge determining apparatus according to a third embodiment of the present invention, which is configured to execute the battery cut-off state of charge determining method according to any of the above embodiments. The device and the method for determining the state of charge of the battery cut-off in the embodiments belong to the same inventive concept, and details which are not described in detail in the embodiments of the device for determining the state of charge of the battery cut-off in the battery charge can refer to the embodiments of the method for determining the state of charge of the battery cut-off in the battery charge. Referring to fig. 3, the battery charge cut-off state of charge determining apparatus may specifically include: a temperature acquisition module 310, a difference determination module 320, a temperature determination module 330, and an off state of charge determination module 340.
The temperature obtaining module 310 is configured to obtain a first real-time temperature of an environment where a battery of the vehicle is located during a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged.
A difference determining module 320, configured to calculate a temperature difference of the vehicle during a charging process according to the first real-time temperature and the second real-time temperature.
And the temperature determination module 330 is configured to determine a highest ambient temperature and a lowest ambient temperature experienced by the battery based on the temperature difference and the air temperature prediction curve.
A cut-off state of charge determination module 340 for determining the cut-off state of charge of the battery during this charging process based on the highest ambient temperature and the lowest ambient temperature experienced by the battery.
Optionally, the temperature determining module 330 may specifically include:
and the first temperature determining unit is used for determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve when the change amplitude of the temperature difference value is stabilized within the preset temperature within the preset time.
Optionally, the temperature determining module 330 may specifically include:
and the second temperature determination unit is used for determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference when the state of charge of the battery reaches the threshold state of charge and the air temperature prediction curve.
Optionally, the cut-off charge state determining module 340 may specifically include:
and the cut-off charge state determining unit is used for determining a first cut-off charge state of the highest ambient temperature and a second cut-off charge state of the lowest ambient temperature based on the highest ambient temperature and the lowest ambient temperature experienced by the battery and the charging cut-off charge state curve, and taking the minimum value of the first cut-off charge state and the second cut-off charge state as the cut-off charge state of the battery in the charging process.
On the basis of the foregoing solution, optionally, the battery charge cut-off state of charge determination apparatus provided in the embodiment of the present invention further includes:
and the curve acquisition module is used for acquiring a charge cut-off charge state curve.
Optionally, the device for determining a battery charge cut-off state of charge provided in the embodiment of the present invention further includes:
the calculation module is used for calculating the charge state of the battery in real time;
and the judging module is used for stopping charging when the charge state of the battery is equal to the cut-off charge state.
On the basis of the above scheme, optionally, the determining module is further configured to continue charging when the state of charge of the battery is not equal to the cut-off state of charge.
According to the battery charging cut-off charge state determining device provided by the third embodiment of the invention, the ambient temperature when the battery is charged and the real-time temperature of the weather forecast of the area where the vehicle is located are obtained through the temperature obtaining module, the difference value determining module calculates the difference value of the ambient temperature and the real-time temperature until the difference value is kept unchanged within the preset time, the temperature determining module can predict the highest ambient temperature and the lowest ambient temperature which the battery may experience in one day, for example, based on the difference value and the air temperature prediction curve, then the cut-off charge state determining module determines the battery charging cut-off charge state based on the highest ambient temperature and the lowest ambient temperature which the battery may experience after being charged, and the situations that the battery is overcharged and the service life of the battery is shortened at low temperature or high temperature. The device for determining the battery charging cut-off charge state provided by the embodiment has positive and important significance for prolonging the service life of the new energy automobile power battery.
The battery charging cut-off charge state determination device provided by the embodiment of the invention can execute the battery charging cut-off charge state determination method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
It should be noted that, in the embodiment of the battery charge cut-off state of charge determination apparatus, the included units and modules are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
Example four
Fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention, as shown in fig. 4, the electronic device includes a memory 410, a processor 420, an input device 430, and an output device 440. The number of the processors 420 in the server may be one or more, and one processor 420 is taken as an example in fig. 4; the memory 410, processor 420, input device 430, and output device 440 in the server may be connected by a bus or other means, such as by bus 450 in fig. 4.
The memory 410, which is a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the battery cut-off state of charge determination method in the embodiment of the present invention (for example, the temperature acquisition module 310, the difference determination module 320, the temperature determination module 330, and the cut-off state of charge determination module 340 in the battery cut-off state of charge determination device). The processor 420 executes various functional applications of the server and data processing, i.e., implements the above-described battery cut-off state of charge determination method, by executing software programs, instructions, and modules stored in the memory 410.
The memory 410 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the server, and the like. Further, the memory 410 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 410 may further include memory located remotely from processor 420, which may be connected to devices through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function controls of the device. The output device 440 may include a display device such as a display screen.
EXAMPLE five
An embodiment of the present invention provides a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method for determining a battery cut-off charge state, the method comprising:
acquiring a first real-time temperature of an environment where a battery of a vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged;
calculating a temperature difference value of the vehicle in the charging process according to the first real-time temperature and the second real-time temperature;
determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and the air temperature prediction curve;
determining a cutoff state of charge of the battery during the charging based on the maximum ambient temperature and the minimum ambient temperature experienced by the battery.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the battery charge cut-off state of charge determination method provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. With this understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A battery charge cutoff state of charge determination method, comprising:
acquiring a first real-time temperature of an environment where a battery of a vehicle is located in a charging process and a second real-time temperature of a weather forecast of an area where the vehicle is charged;
calculating a temperature difference value of the vehicle in a charging process according to the first real-time temperature and the second real-time temperature;
determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and an air temperature prediction curve;
determining a cutoff state of charge of the battery during this charging based on the highest ambient temperature and the lowest ambient temperature experienced by the battery.
2. The battery cut-off state-of-charge determination method of claim 1, wherein determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and an air temperature prediction curve comprises:
and when the variation amplitude of the temperature difference value is stabilized within a preset temperature within a preset time, determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve.
3. The battery cut-off state-of-charge determination method of claim 1, wherein determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference and an air temperature prediction curve comprises:
and determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference when the state of charge of the battery reaches the threshold state of charge and the air temperature prediction curve.
4. The battery charge cutoff state of charge determination method of claim 1, wherein determining the cutoff state of charge of the battery during this charging based on the highest ambient temperature and the lowest ambient temperature experienced by the battery comprises:
and determining a first cut-off charge state of the highest ambient temperature and a second cut-off charge state of the lowest ambient temperature based on the highest ambient temperature and the lowest ambient temperature experienced by the battery and a charge cut-off charge state curve, and taking the minimum value of the first cut-off charge state and the second cut-off charge state as the cut-off charge state of the battery in the charging process.
5. The method for determining the battery charge cut-off state of charge according to claim 4, wherein before obtaining a first real-time temperature of an environment where the battery is located in the charging process of the vehicle and a second real-time temperature of a weather forecast of an area where the vehicle is charged, the method further comprises:
and acquiring the charge cut-off state of charge curve.
6. The battery charge cutoff state of charge determination method of claim 1, further comprising, after determining a cutoff state of charge of the battery during this charging based on the highest ambient temperature and the lowest ambient temperature experienced by the battery:
calculating the state of charge of the battery in real time;
stopping charging when the state of charge of the battery is equal to the cutoff state of charge.
7. The battery charge cutoff state of charge determination method as recited in claim 6, further comprising:
and when the state of charge of the battery is not equal to the cut-off state of charge, continuing charging.
8. A battery charge cutoff state of charge determination apparatus, comprising:
the temperature acquisition module is used for acquiring a first real-time temperature of an environment where a battery is located in the charging process of the vehicle and a second real-time temperature of a weather forecast of an area where the vehicle is charged;
the difference value determining module is used for calculating a temperature difference value of the vehicle in the charging process according to the first real-time temperature and the second real-time temperature;
the temperature determination module is used for determining the highest ambient temperature and the lowest ambient temperature experienced by the battery based on the temperature difference value and the air temperature prediction curve;
a cutoff state of charge determination module to determine a cutoff state of charge of the battery during the charging based on the highest ambient temperature and the lowest ambient temperature experienced by the battery.
9. An electronic device, characterized in that the electronic device comprises:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the battery charge cutoff state of charge determination method of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the battery charge cut-off state of charge determination method according to any one of claims 1 to 7.
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