CN112519597B - Battery charging method, system, computer device and readable storage medium - Google Patents
Battery charging method, system, computer device and readable storage medium Download PDFInfo
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- CN112519597B CN112519597B CN201910874958.6A CN201910874958A CN112519597B CN 112519597 B CN112519597 B CN 112519597B CN 201910874958 A CN201910874958 A CN 201910874958A CN 112519597 B CN112519597 B CN 112519597B
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a battery charging method, which comprises the following steps: judging whether the vehicle meets the charging condition or not through a management strategy before the charging starts; when the vehicle meets the charging condition, detecting the open-circuit voltage value of the battery, and judging the voltage state of the battery according to the open-circuit voltage value of the battery, wherein the voltage state comprises an electric quantity full voltage state, an electric quantity low voltage state and an electric quantity low voltage state; when the battery is in a state of full electric quantity and full voltage, the battery is subjected to pulse charging through a pulse charging strategy; when the battery is in a low-voltage state, performing constant-current charging on the battery through a non-voltage low-constant-current charging strategy; when the battery is in the state of low electric quantity and low voltage, the battery is subjected to constant current charging through a low-voltage constant current charging strategy. The invention also discloses a battery charging system, computer equipment and a readable storage medium. By adopting the invention, the probability of accidents occurring during battery charging can be greatly reduced through a strict management strategy.
Description
Technical Field
The present invention relates to the field of battery charging technologies, and in particular, to a battery charging method, a battery charging system, a computer device, and a readable storage medium.
Background
The vehicle-mounted intelligent communication module is used as an important means for seeking help to the outside in case of emergency, and when the power supply equipment in the vehicle breaks down due to an accident in driving, the vehicle-mounted intelligent communication module needs to be switched to supply power through a backup battery, wherein the backup battery generally mainly comprises a nickel-hydrogen battery. Therefore, in order to ensure that the vehicle-mounted intelligent communication module can be normally switched to the backup battery to supply power and send out rescue signals when an emergency occurs in the service life of the automobile, the management strategy of the backup battery is particularly important.
The current vehicle-mounted nickel-metal hydride battery management strategy basically judges the starting and stopping of charging in a mode of reading the voltage of a backup battery. However, the voltage value of the nickel-metal hydride battery in the charging and discharging process is different from the actual voltage value, so that whether the backup battery is fully charged or not cannot be guaranteed, the cruising ability of the backup battery is insufficient when an emergency occurs, and the successful transmission of help seeking information cannot be guaranteed.
Accordingly, a simple high-temperature protection mechanism is provided to realize charging emergency treatment, the mechanism judges the ambient temperature by using an external thermistor, and charging is stopped when the ambient temperature is too high. However, this method is easily affected by the temperature of the external environment, and if the external environment is locally heated instantaneously due to air conditioning, heating, or other equipment, the measured temperature may deviate from the actual temperature of the backup battery, and the battery is likely to be mistaken for being at a high temperature and the charging is stopped, so that the charging time of the backup battery is delayed; or the situation that the actual temperature of the backup battery reaches the dangerous temperature, but the measured temperature is still in the safe range occurs, so that the vehicle-mounted nickel-metal hydride battery is continuously charged, and the risk of damaging the battery exists.
Therefore, a charging management strategy is needed to effectively monitor the state of the vehicle-mounted backup battery to implement reliable charging and discharging logic for the vehicle-mounted backup battery, and simultaneously avoid the influence of the external environment on the internal backup battery, so as to ensure that the vehicle-mounted backup battery is always in a safe use state.
Disclosure of Invention
The present invention provides a battery charging method, a battery charging system, a computer device and a readable storage medium, which can reduce the probability of accidents occurring during battery charging.
In order to solve the above technical problem, the present invention provides a battery charging management method, including: judging whether the vehicle meets the charging condition or not through a management strategy before the charging starts; when the vehicle does not meet the charging condition, ending the charging; when the vehicle meets the charging condition, detecting the open-circuit voltage value of the battery, and judging the voltage state of the battery according to the open-circuit voltage value of the battery, wherein the voltage state comprises an electric quantity full voltage state, an electric quantity low voltage state and an electric quantity low voltage state; when the battery is in a state of full electric quantity voltage, pulse charging is carried out on the battery through a pulse charging strategy; when the battery is in a low-voltage state, performing constant-current charging on the battery through a non-voltage low-constant-current charging strategy; and when the battery is in a state of low electric quantity and low voltage, performing constant current charging on the battery through a low-voltage constant current charging strategy.
As an improvement of the above, the step of determining the voltage state of the battery according to the open-circuit voltage value of the battery includes: comparing the battery open-circuit voltage value with a preset high voltage threshold value and a preset low voltage threshold value; when the open-circuit voltage value of the battery is larger than the high voltage threshold value, the battery is in a full-electric-quantity voltage state; when the low voltage threshold value is less than or equal to the battery open-circuit voltage value and less than or equal to the high voltage threshold value, the battery is in a low-voltage state; and when the open-circuit voltage value of the battery is less than the low voltage threshold value, the battery is in a state of low electric quantity and low voltage.
As an improvement of the above scheme, the management strategy before charging starts judges whether the vehicle meets the charging condition according to the vehicle state and the battery temperature information; the pulse charging strategy carries out pulse charging on the battery according to the vehicle state and the battery temperature information; the non-low-voltage constant-current charging strategy is used for carrying out constant-current charging on the battery according to the vehicle state and the battery temperature information; and the over-low voltage constant current charging strategy is used for carrying out constant current charging on the battery according to the temperature information of the battery.
As an improvement of the above, the management policy before charging start includes: acquiring vehicle state information; judging whether the vehicle is in a starting state or not according to the vehicle state information; when the vehicle is not in the starting state, ending the charging; when the vehicle is in a starting state, detecting battery temperature information, and judging whether the battery meets charging conditions or not according to the battery temperature information; when the battery does not meet the charging condition, the vehicle does not meet the charging condition; when the battery meets the charging condition, the vehicle meets the charging condition.
As an improvement of the above solution, the pulse charging strategy comprises: circularly charging the battery in a pulse mode; acquiring vehicle state information; judging whether the vehicle is in a starting state or not according to the vehicle state information; when the vehicle is not in the starting state, ending the charging; when the vehicle is in a starting state, detecting battery temperature information, and judging whether the battery meets charging conditions or not according to the battery temperature information; when the battery meets the charging condition, executing the pulse charging strategy; when the battery does not accord with the charging condition, the vehicle state information is acquired again after the charging is suspended for a period of time.
As an improvement of the above scheme, the non-undervoltage constant current charging strategy includes: charging the battery in a constant current mode; accumulating the charging time; acquiring vehicle state information; judging whether the vehicle is in a starting state or not according to the vehicle state information; when the vehicle is not in the starting state, stopping accumulating the charging time and finishing charging; when the vehicle is in a starting state, detecting battery temperature information and judging whether the battery meets charging conditions or not according to the battery temperature information; when the battery does not accord with the charging condition, the accumulated charging time is paused, and after the charging is paused for a period of time, the vehicle state information is obtained again; when the battery meets the charging condition, judging whether the charging time is enough; when the charging time is enough, ending the non-voltage over-low constant current charging strategy, clearing the charging time, and executing the pulse charging strategy; and when the charging time is not enough, executing the non-voltage-too-low constant current charging strategy.
As an improvement of the above scheme, the low-voltage constant-current charging strategy includes: charging the battery in a constant current mode; accumulating the charging time; detecting battery temperature information; judging whether the battery meets the charging condition or not according to the battery temperature information; when the battery does not accord with the charging condition, the accumulated charging time is paused, and after the charging is paused for a period of time, the temperature information of the battery is re-detected; when the battery meets the charging condition, judging whether the charging time is enough; when the charging time is enough, ending the over-low voltage constant current charging strategy, clearing the charging time, and executing the pulse charging strategy; and when the charging time is not enough, executing the over-voltage constant current charging strategy.
Accordingly, the present invention also provides a battery charging system, comprising: the system comprises a charging starting management module, a charging starting management module and a charging starting management module, wherein the charging starting management module is used for detecting a battery open-circuit voltage value by judging whether a vehicle meets a charging condition or not, and judging the voltage state of a battery according to the battery open-circuit voltage value, and the voltage state comprises an electric quantity full-charge voltage state, an electric quantity low-voltage state and an electric quantity low-voltage state; the pulse charging module is used for carrying out pulse charging on the battery through a pulse charging strategy when the battery is in a state of full electric quantity and full voltage; the non-voltage over-low constant current charging module is used for performing constant current charging on the battery through a non-voltage over-low constant current charging strategy when the battery is in a state of low electric quantity and low voltage; and the over-low voltage constant current charging module is used for performing constant current charging on the battery through an over-low voltage constant current charging strategy when the battery is in an over-low voltage state.
Accordingly, the present invention also provides a computer device comprising a memory storing a computer program and a processor executing the steps of the above battery charging method.
Accordingly, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the battery charging method.
The implementation of the invention has the following beneficial effects:
the invention judges whether the vehicle meets the charging condition by executing the management strategy before the charging is started, detects the open-circuit voltage value of the battery under the condition that the vehicle meets the charging condition, and then judges the voltage state of the battery according to the open-circuit voltage value of the battery, thereby determining which strategy is to be executed subsequently. Specifically, the method comprises the following steps:
if the open-circuit voltage value of the battery is in the state of full electric quantity voltage, the current electric quantity of the battery is sufficient, and pulse charging circulation can be carried out through a pulse charging strategy to keep the sufficient electric quantity;
if the open-circuit voltage value of the battery is in a state of low electric quantity voltage, the open-circuit voltage value indicates that the battery is interrupted in the last charging process, the battery still has certain electric quantity, and constant-current charging can be carried out through a non-voltage low-constant-current charging strategy so as to continuously complete a complete charging process;
if the open-circuit voltage value of the battery is in a state of low electric quantity and low voltage, the current electric quantity of the battery is seriously insufficient, and the battery needs to be subjected to constant-current charging through a low-voltage constant-current charging strategy so as to fully charge the battery as far as possible.
Drawings
FIG. 1 is a flow chart of an embodiment of a battery charge management method of the present invention;
FIG. 2 is a flow diagram of an embodiment of managing policies before charging begins in the present invention;
FIG. 3 is a flow chart of an embodiment of a pulsed charging strategy of the present invention;
FIG. 4 is a flow chart of an embodiment of a non-undervoltage constant current charging strategy in accordance with the present invention;
FIG. 5 is a flow chart of an embodiment of a low voltage constant current charging strategy according to the present invention;
FIG. 6 is a schematic diagram of the battery charging system of the present invention;
FIG. 7 is a schematic structural diagram of a management module before charging starts in the present invention;
FIG. 8 is a schematic diagram of a pulse charging module according to the present invention;
FIG. 9 is a schematic diagram of a non-undervoltage constant current charging module according to the present invention;
fig. 10 is a schematic structural diagram of the low-voltage constant-current charging module according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows a flow chart of an embodiment of the battery charging method of the present invention, which includes:
and S101, judging whether the vehicle meets the charging condition or not through a management strategy before charging starts.
And S102, when the vehicle does not meet the charging condition, ending the charging.
And S103, detecting the open-circuit voltage value of the battery when the vehicle meets the charging condition.
Specifically, the invention can adopt a digital-to-analog converter to obtain the open-circuit voltage value of the battery.
And S104, judging the voltage state of the battery according to the battery open-circuit voltage value.
It should be noted that the voltage states include a state of full charge, a state of low charge, and a state of low charge.
Specifically, the method for judging the voltage state of the battery according to the battery open-circuit voltage value comprises the following steps: and comparing the battery open-circuit voltage value with a preset high voltage threshold value and a preset low voltage threshold value, wherein the high voltage threshold value is greater than the low voltage threshold value. Wherein:
(1) when the battery open-circuit voltage value is larger than the high voltage threshold value, the battery is in a full-charge voltage state.
(2) And when the low voltage threshold value is less than or equal to the battery open-circuit voltage value and less than or equal to the high voltage threshold value, the battery is in a low-voltage state.
(3) And when the battery open-circuit voltage value is less than the low voltage threshold value, the battery is in a state of low battery level and low voltage.
In the comparison process, the battery open-circuit voltage value and the high voltage threshold value can be compared, when the battery open-circuit voltage value is greater than the high voltage threshold value, the battery is in the electric quantity full charge voltage state, when the battery open-circuit voltage value is smaller than or equal to the high voltage threshold value, the battery open-circuit voltage value is compared with the low voltage threshold value, when the battery open-circuit voltage value is smaller than the low voltage threshold value, the battery is in the electric quantity full charge voltage state, otherwise, the battery is in the electric quantity low voltage state.
In addition, in the comparison process, the battery open-circuit voltage value can be compared with the low voltage threshold, when the battery open-circuit voltage value is smaller than the low voltage threshold, the battery is in a state of full-charge voltage of electric quantity, otherwise, the battery open-circuit voltage value is compared with the high voltage threshold, when the battery open-circuit voltage value is larger than the high voltage threshold, the battery is in a state of full-charge voltage of electric quantity, otherwise, the battery is in a state of low voltage of electric quantity.
And S105, when the battery is in an electric quantity sufficient voltage state, carrying out pulse charging on the battery through a pulse charging strategy.
And S106, when the battery is in a low-voltage state, performing constant-current charging on the battery through a non-voltage low-constant-current charging strategy.
And S107, when the battery is in a state of low electric quantity and low voltage, performing constant current charging on the battery through a low-voltage constant current charging strategy.
It should be noted that the purpose of executing different charging management strategies according to different open-circuit voltage values of the battery is as follows: judging the current electric quantity of the battery according to the open-circuit voltage value of the battery, wherein the larger the open-circuit voltage value of the battery is, the higher the current electric quantity of the battery is, so that a high-voltage threshold value can be set, when the open-circuit voltage value of the battery is higher than the high-voltage threshold value, the current electric quantity of the battery can be considered to be sufficient, and only pulse charging circulation is needed to keep the sufficient electric quantity all the time; if the open-circuit voltage value of the battery is lower than the high voltage threshold, a low voltage threshold can be set, and when the open-circuit voltage value of the battery is lower than the low voltage threshold, the current electric quantity of the battery is considered to be seriously insufficient, and the battery needs to be charged by over-low voltage and constant current so as to fully charge the battery as much as possible; if the open-circuit voltage value of the battery is not higher than the high voltage threshold value or lower than the low voltage threshold value, it can be understood that the battery is interrupted in the last charging process, and the battery still has certain electric quantity, then the non-voltage over-low constant current charging is carried out, so as to continue to complete the complete charging process.
Therefore, the present invention determines what strategy will be executed later by executing a pre-charge management strategy to determine whether the vehicle satisfies the charging condition, and detecting the battery open-circuit voltage value if the vehicle satisfies the charging condition, and then determining the voltage state of the battery based on the battery open-circuit voltage value.
In the invention, the management strategy before the charging can judge whether the vehicle meets the charging condition according to the vehicle state and the battery temperature information. As can be seen from fig. 2, the management policy before charging start includes:
s201, vehicle state information is acquired.
In the invention, the Key state can be acquired through a Key management ECU, and the Key state is vehicle state information.
And S202, judging whether the vehicle is in a starting state or not according to the vehicle state information.
It should be noted that when the Key state is "Key ON", it indicates that the vehicle is in a starting state; when the Key state is "Key OFF", it indicates that the vehicle is not in the start state.
And S203, ending the charging when the vehicle is not in the starting state.
The purpose of determining whether the vehicle is in the starting state is to: the charging of the vehicle in a parked state is prevented, thereby avoiding accidents.
And S204, detecting the battery temperature information when the vehicle is in a starting state.
When the battery temperature information is detected, the resistance value of the thermistor in the battery needs to be detected, and then the battery temperature information is obtained according to the relation curve of the resistance value of the thermistor and the temperature.
S205, judging whether the battery meets the charging condition according to the battery temperature information; when the battery does not meet the charging condition, the vehicle does not meet the charging condition; when the battery meets the charging condition, the vehicle meets the charging condition.
The purpose of determining the battery temperature information is to: the charging is prevented from being carried out under the condition that the temperature of the battery is too high or too low and the like which do not accord with the charging, and the damage to the battery or the occurrence of accidents are avoided.
Therefore, in the present invention, when two charge start conditions (vehicle state information and battery temperature information) need to be met, an appropriate charge strategy can be selected according to the voltage state of the battery.
In the invention, when the battery is in a state of full electric quantity and full voltage, the battery is subjected to pulse charging through a pulse charging strategy. And the pulse charging strategy carries out pulse charging on the battery according to the vehicle state and the battery temperature information. As can be seen in fig. 3, the pulse charging strategy includes:
and S301, circularly charging the battery in a pulse mode.
After the pulse charging strategy is started, a pulse charging cycle is entered, and the cycle logic is to control the battery constant current charging circuit to operate according to the mode of 'work 1.2s → pause work 58.8s → work 1.2s → pause work 58.8s … …'.
And S302, acquiring vehicle state information.
And S303, judging whether the vehicle is in a starting state or not according to the vehicle state information.
And S304, when the vehicle is not in the starting state, ending the charging.
S305, when the vehicle is in the start state, detects battery temperature information.
S306, judging whether the battery meets the charging condition or not according to the battery temperature information; when the battery meets the charging condition, executing the pulse charging strategy; when the battery does not accord with the charging condition, the vehicle state information is acquired again after the charging is suspended for a period of time.
Specifically, whether the battery meets the charging condition can be determined by comparing the battery temperature information with the preset temperature information. For example, when the battery temperature information is less than the preset temperature information, it indicates that the battery is in accordance with the charging condition, otherwise, the battery is not in accordance with the charging condition.
It should be noted that, when the battery temperature information does not meet the charging condition, the purpose of suspending charging for a period of time is: the charging can be stopped in time when the temperature condition of continuous charging can not be met due to overheating or overcooling of the battery caused by air conditioners, external environments and the like or the battery generates heat too much due to charging, so that accidents are avoided. Preferably, the pause duration in the present invention is generally 10 minutes, but not limited thereto, and the technician can preset the pause duration according to the actual situation, which is highly flexible.
And after the pulse charging is started, acquiring vehicle state information, and if the vehicle is judged not to be in a starting state, ending the charging. If the vehicle is judged to be in the starting state, detecting the temperature information of the battery, if the battery is judged to meet the charging condition, indicating that the current environment and the battery state both meet the charging requirement, continuously performing pulse charging circulation, and repeating the step of acquiring the vehicle state information and the subsequent steps, and the like. And if the battery is judged to be not in accordance with the charging condition, stopping charging for a period of time, controlling the constant-current charging circuit of the battery to stop working, waiting for a period of time, and re-performing the vehicle state information acquisition step and the subsequent steps after the waiting is finished until the battery is judged to be in accordance with the charging condition, so that pulse charging circulation can be continued.
Therefore, the pulse charging strategy can ensure that the battery can be charged as soon as possible when the temperature condition of continuous charging is met, and the condition that the battery cannot meet the requirement of service time due to insufficient electric quantity caused by non-charging for too long time when abnormal conditions occur is avoided as far as possible.
In the invention, when the battery is in a state of low electric quantity and low voltage, the battery is subjected to constant current charging by a non-voltage low constant current charging strategy. And the non-over-voltage constant current charging strategy is used for carrying out constant current charging on the battery according to the vehicle state and the battery temperature information. As can be seen from fig. 4, the non-undervoltage constant current charging strategy includes:
and S401, charging the battery in a constant current mode.
And S402, accumulating the charging time.
Specifically, the charging time may be accumulated by a timer.
And S403, acquiring vehicle state information.
And S404, judging whether the vehicle is in a starting state or not according to the vehicle state information.
And S405, stopping accumulating the charging time and finishing charging when the vehicle is not in the starting state.
And S406, detecting battery temperature information when the vehicle is in a starting state.
And S407, judging whether the battery meets the charging condition or not according to the battery temperature information.
And S408, when the battery does not accord with the charging condition, pausing the accumulated charging time and pausing the charging for a period of time, and then acquiring the vehicle state information again.
S409, when the battery meets the charging condition, judging whether the charging time is enough; when the charging time is enough, ending the non-voltage over-low constant current charging strategy, clearing the charging time, and executing the pulse charging strategy; and when the charging time is not enough, executing the non-voltage-too-low constant current charging strategy.
It should be noted that, for the charging time of the vehicle-mounted nickel-metal hydride battery, a time value may be set, and when the charging time reaches the time value during the constant current charging, the battery capacity may be considered to be sufficient at this time. For example, a 600mAh nickel-hydrogen battery is charged with a constant current of 60mA, and the time value for which the electric quantity is sufficient can be set to 10 h.
And after the constant-current charging is started, starting/continuing the previous charging time accumulation to acquire the vehicle state information, and stopping the charging time accumulation and ending the charging if the vehicle is judged not to be in the starting state. If the vehicle is judged to be in the starting state, battery temperature information is detected, and if the battery is judged to accord with the charging condition, whether the charging time is enough or not is judged. If the charging time is enough, ending the non-voltage over-low constant current charging strategy, clearing the charging time, executing the pulse charging management strategy, if not enough, executing the non-voltage over-low constant current charging strategy again, and repeating the steps.
In the invention, when the battery is in a state of low electric quantity and low voltage, the battery is subjected to constant current charging through a low-voltage constant current charging strategy. As can be seen from fig. 5, the low-voltage constant-current charging strategy includes:
and S501, charging the battery in a constant current mode.
And S502, accumulating the charging time.
S503, battery temperature information is detected.
And S504, judging whether the battery meets the charging condition or not according to the battery temperature information.
And S505, when the battery does not accord with the charging condition, pausing the accumulated charging time and pausing the charging for a period of time, and then re-detecting the temperature information of the battery.
S506, when the battery meets the charging condition, judging whether the charging time is enough; when the charging time is enough, ending the over-low voltage constant current charging strategy, clearing the charging time, and executing the pulse charging strategy; and when the charging time is not enough, executing the over-voltage constant current charging strategy.
It should be noted that, when the open-circuit voltage value of the battery is lower than the low-voltage threshold, it may be considered that the current capacity of the battery is seriously insufficient, and it is necessary to perform the constant-current charging with too low voltage to fully charge the battery as much as possible, and at this time, the vehicle should maintain the charging even if not in the starting state. Therefore, the undervoltage constant-current charging strategy only needs to perform constant-current charging on the battery according to the battery temperature information, and vehicle state information does not need to be considered.
And after the constant-current charging is started, accumulating the charging time, detecting the temperature information of the battery, and judging whether the charging time is enough or not if the battery is judged to accord with the charging condition. If the charging time is enough, ending the over-low voltage constant current charging strategy, clearing the charging time, executing the pulse charging management strategy, if not enough, re-executing the over-low voltage constant current charging strategy, and repeating the steps. And if the battery is judged not to accord with the charging condition, stopping charging time accumulation, stopping charging for a period of time, and detecting the temperature information of the battery again after the battery is waited for, so that the last charging time accumulation can be continued and the constant-current charging can be continued until the battery is judged to accord with the charging condition.
Therefore, before charging, whether the vehicle meets the charging condition can be judged by detecting the vehicle state information and the battery temperature information, and what charging strategy is adopted for charging can be judged by detecting the open-circuit voltage value of the battery. When the pulse charging strategy is adopted to carry out pulse charging on the battery, the vehicle state and the battery temperature information need to be considered, the battery can be effectively ensured to be charged as soon as possible when the temperature condition of continuous charging is met, and the condition that the battery is insufficient in electric quantity due to long-time non-charging and cannot meet the requirement of service time when abnormal conditions occur is avoided as far as possible; when a non-voltage over-low constant current charging strategy is adopted to perform constant current charging on the battery, the vehicle state, the battery temperature information and the charging time need to be considered; when the battery is subjected to constant current charging by adopting a constant current charging strategy with too low voltage, the current electric quantity of the battery is considered to be seriously insufficient, and the battery is fully charged as far as possible only by considering the temperature information and the charging time of the battery and not considering the vehicle state information.
Referring to fig. 6, fig. 6 shows a specific structure of the battery charging system 100 of the present invention, which includes a management module 1 before charging, a pulse charging module 2, a non-undervoltage constant current charging module 3, and an undervoltage constant current charging module 4, specifically:
the management module 1 before charging is used for detecting the open-circuit voltage value of the battery and judging the voltage state of the battery according to the open-circuit voltage value of the battery by judging whether the vehicle meets the charging condition or not. The voltage state comprises an electric quantity full voltage state, an electric quantity low voltage state and an electric quantity low voltage state.
And the pulse charging module 2 is used for performing pulse charging on the battery through a pulse charging strategy when the battery is in an electric quantity sufficient voltage state.
And the non-voltage over-low constant current charging module 3 is used for performing constant current charging on the battery through a non-voltage over-low constant current charging strategy when the battery is in a low-voltage state.
And the over-low voltage constant current charging module 4 is used for performing constant current charging on the battery through an over-low voltage constant current charging strategy when the battery is in an over-low electric quantity voltage state.
Specifically, the management module 1 may obtain the open-circuit voltage value of the battery by using a digital-to-analog converter before the charging starts; then, the management module 1 compares the battery open-circuit voltage value with a preset high voltage threshold and a preset low voltage threshold before the charging starts, and when the battery open-circuit voltage value is greater than the high voltage threshold, the battery is in a state of full-charge voltage of electric quantity, and the pulse charging module 2 can be driven to perform pulse charging on the battery through a pulse charging strategy; when the low voltage threshold value is less than or equal to the battery open-circuit voltage value and less than or equal to the high voltage threshold value, the battery is in a low-voltage state, and the non-voltage low-constant current charging module 3 can be driven to perform constant current charging on the battery through a non-voltage low-constant current charging strategy; when the open-circuit voltage value of the battery is smaller than the low voltage threshold value, the battery is in a state of low electric quantity and low voltage, and the low-voltage constant-current charging module 4 can be driven to perform constant-current charging on the battery through a low-voltage constant-current charging strategy.
Therefore, the present invention determines what strategy will be executed later by executing a pre-charge management strategy to determine whether the vehicle satisfies the charging condition, and detecting the battery open-circuit voltage value if the vehicle satisfies the charging condition, and then determining the voltage state of the battery based on the battery open-circuit voltage value.
As shown in fig. 7, the management module 1 before charging start includes:
a first state acquisition unit 11 for acquiring vehicle state information.
A first state judgment unit 12, configured to judge whether the vehicle is in a starting state according to the vehicle state information; wherein when the vehicle is not in the start state, the charging is ended.
A first temperature detection unit 13 for detecting battery temperature information when the first state judgment unit 12 judges that the vehicle is in the start state.
A first condition judgment unit 14, configured to judge whether the battery meets a charging condition according to the battery temperature information; wherein, when the battery does not accord with the charging condition, the charging is finished.
And a voltage detection unit 15 for detecting the open-circuit voltage value of the battery when the first condition judgment unit 14 judges that the battery does not conform to the charging condition.
A voltage judging unit 16, configured to judge a voltage state of the battery according to the battery open-circuit voltage value; when the battery is in a state of full electric quantity and full voltage, the pulse charging module is driven; when the battery is in a low-voltage state, driving a non-voltage low-constant current charging module; and when the battery is in a state of low electric quantity and low voltage, the driving voltage is low, and the constant current charging module is driven.
Therefore, when the management module 1 needs to meet two charging start conditions (vehicle state information and battery temperature information) before the charging starts, an appropriate charging strategy can be selected according to the voltage state of the battery.
As shown in fig. 8, the pulse charging module 2 includes:
and the pulse charging unit 21 is used for circularly charging the battery in a pulse mode.
A second state acquisition unit 22 for acquiring vehicle state information.
A second state judgment unit 23, configured to judge whether the vehicle is in a starting state according to the vehicle state information; wherein when the vehicle is not in the start state, the charging is ended.
And a second temperature detecting unit 24 for detecting battery temperature information when the second state judging unit 23 judges that the vehicle is in the starting state.
A second condition judgment unit 25, configured to judge whether the battery meets a charging condition according to the battery temperature information; wherein, when the battery accords with the charging condition, the pulse charging unit 21 is driven; when the battery does not meet the charging condition, the driving pulse charging unit 21 drives the second state obtaining unit 22 to operate after suspending charging for a period of time.
Therefore, the pulse charging module 2 can ensure that the battery can be charged as soon as possible when the temperature condition of continuous charging is met, and the condition that the battery cannot meet the requirement of service time due to insufficient electric quantity caused by long-time non-charging when abnormal conditions occur is avoided as far as possible.
As shown in fig. 9, the non-undervoltage constant current charging module 3 includes:
and a first constant current charging unit 31 for charging the battery in a constant current manner.
The first time accumulating unit 32 is configured to accumulate the charging time.
A third state acquisition unit 33 for acquiring vehicle state information.
A third state judgment unit 34, configured to judge whether the vehicle is in a starting state according to the vehicle state information; when the vehicle is not in the starting state, the first time integration unit 32 is driven to stop integrating the charging time, and the charging is finished.
And a third temperature detecting unit 35 for detecting battery temperature information when the third state judging unit 34 judges that the vehicle is in the activated state.
A third condition determining unit 36, configured to determine whether the battery meets the charging condition according to the battery temperature information; when the battery does not meet the charging condition, the first time accumulation unit 32 is driven to suspend accumulating the charging time, and after the first constant current charging unit 32 is driven to suspend charging for a period of time, the third state acquisition unit 33 is driven to work.
A first time judging unit 37, configured to judge whether the charging time is sufficient or not when the third condition judging unit 36 judges that the battery meets the charging condition; when the charging time is enough, the non-voltage low constant current charging module is quitted, the first time accumulation unit 32 is driven to clear the charging time, and the pulse charging module 2 is driven to work; when the charging time is insufficient, the first constant current charging unit 31 is driven to operate.
Therefore, the non-undervoltage constant current charging module 3 needs to perform constant current charging on the battery according to the vehicle state information and the battery temperature information.
As shown in fig. 10, the low-voltage constant-current charging module 4 includes:
and a second constant current charging unit 41 for charging the battery in a constant current manner.
The second time accumulating unit 42 accumulates the charging time.
And a fourth temperature detection unit 43 for detecting battery temperature information.
A fourth condition determining unit 44, configured to determine whether the battery meets the charging condition according to the battery temperature information; when the battery does not meet the charging condition, the second time accumulation unit 42 is driven to suspend accumulating the charging time, and after the second constant current charging unit 41 is driven to suspend charging for a period of time, the fourth temperature detection unit 43 is driven to work.
A second time judgment unit 45, which judges whether the charging time is sufficient or not when the fourth condition judgment unit 41 judges that the battery meets the charging condition; when the charging time is enough, the charging module 4 with the low voltage and the constant current is quitted, the second time accumulation unit 42 is driven to clear the charging time, and the pulse charging unit 2 is driven to work; when the charging time is insufficient, the second constant current charging unit 42 is driven to operate.
Therefore, the undervoltage constant current charging module 4 only needs to perform constant current charging on the battery according to the battery temperature information, and does not need to consider the vehicle state information.
Correspondingly, the invention also provides computer equipment which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the battery charging method when executing the computer program. Meanwhile, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described battery charging method.
Therefore, the charging environment is monitored in real time by using a strict management strategy, so that whether the battery can be charged or not, whether the battery can be charged continuously or not, whether the charging is finished or not and the electric quantity after the charging is finished are strictly controlled, the probability of accidents during the charging of the battery is greatly reduced, and the safety is high. Meanwhile, the invention can detect the temperature abnormity of the battery, the change of the starting state of the vehicle and the like in real time before and during the charging process, can rapidly quit the charging once the condition for continuing the charging is not satisfied, and can recover the previous charging progress after the charging condition is satisfied again until the electric quantity of the battery is sufficient, thereby having strong flexibility, ensuring that the battery can rapidly reach and constantly maintain the state of sufficient electric quantity, and providing sufficient battery continuation of the journey for the system and the user to send out distress information when the automobile has an accident.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method of charging a battery, comprising:
judging whether the vehicle meets the charging condition or not through a management strategy before the charging starts; the management strategy before the charging starts judges whether the vehicle meets the charging condition according to the vehicle state and the battery temperature information; the pre-charge management policy includes: acquiring vehicle state information, and judging whether the vehicle is in a starting state or not according to the vehicle state information; when the vehicle is not in the starting state, ending the charging; when the vehicle is in a starting state, detecting battery temperature information, and judging whether the battery meets charging conditions or not according to the battery temperature information; when the battery does not meet the charging condition, the vehicle does not meet the charging condition; when the battery meets the charging condition, the vehicle meets the charging condition;
when the vehicle does not meet the charging condition, ending the charging;
when the vehicle meets the charging condition, detecting the open-circuit voltage value of the battery, and judging the voltage state of the battery according to the open-circuit voltage value of the battery, wherein the voltage state comprises an electric quantity full voltage state, an electric quantity low voltage state and an electric quantity low voltage state;
when the battery is in a state of full electric quantity voltage, pulse charging is carried out on the battery through a pulse charging strategy; the pulse charging strategy is used for carrying out pulse charging on the battery according to the vehicle state and the battery temperature information;
when the battery is in a low-voltage state, performing constant-current charging on the battery through a non-voltage low-constant-current charging strategy; the non-over-voltage constant current charging strategy is used for carrying out constant current charging on the battery according to the vehicle state and the battery temperature information;
when the battery is in a state of low electric quantity and low voltage, performing constant current charging on the battery through a low-voltage constant current charging strategy; and the over-low voltage constant current charging strategy is used for performing constant current charging on the battery according to the temperature information of the battery.
2. The battery charging method according to claim 1, wherein the step of determining the voltage state of the battery based on the open-circuit voltage value of the battery comprises:
comparing the battery open-circuit voltage value with a preset high voltage threshold value and a preset low voltage threshold value;
when the battery open-circuit voltage value is greater than the high voltage threshold value, the battery is in a full-electric-quantity voltage state;
when the low voltage threshold value is less than or equal to the battery open-circuit voltage value and less than or equal to the high voltage threshold value, the battery is in a low-voltage state;
and when the battery open-circuit voltage value is less than the low voltage threshold value, the battery is in a state of low battery level and low voltage.
3. The battery charging method of claim 1, wherein the pulse charging strategy comprises:
circularly charging the battery in a pulse mode;
acquiring vehicle state information;
judging whether the vehicle is in a starting state or not according to the vehicle state information;
when the vehicle is not in the starting state, ending the charging;
when the vehicle is in a starting state, detecting battery temperature information, and judging whether the battery meets charging conditions or not according to the battery temperature information;
when the battery meets the charging condition, executing the pulse charging strategy;
when the battery does not accord with the charging condition, the vehicle state information is acquired again after the charging is suspended for a period of time.
4. The battery charging method of claim 1, wherein the non-undervoltage constant current charging strategy comprises:
charging the battery in a constant current mode;
accumulating the charging time;
acquiring vehicle state information;
judging whether the vehicle is in a starting state or not according to the vehicle state information;
when the vehicle is not in the starting state, stopping accumulating the charging time and finishing charging;
when the vehicle is in a starting state, detecting battery temperature information and judging whether the battery meets charging conditions or not according to the battery temperature information;
when the battery does not accord with the charging condition, the accumulated charging time is paused, and after the charging is paused for a period of time, the vehicle state information is obtained again;
when the battery meets the charging condition, judging whether the charging time is enough;
when the charging time is enough, ending the non-voltage over-low constant current charging strategy, clearing the charging time, and executing the pulse charging strategy;
and when the charging time is not enough, executing the non-voltage-too-low constant current charging strategy.
5. The battery charging method of claim 1, wherein the undervoltage constant current charging strategy comprises:
charging the battery in a constant current mode;
accumulating the charging time;
detecting battery temperature information;
judging whether the battery meets the charging condition or not according to the battery temperature information;
when the battery does not accord with the charging condition, the accumulated charging time is paused, and after the charging is paused for a period of time, the temperature information of the battery is re-detected;
when the battery meets the charging condition, judging whether the charging time is enough;
when the charging time is enough, ending the over-low voltage constant current charging strategy, clearing the charging time, and executing the pulse charging strategy;
and when the charging time is not enough, executing the over-voltage constant current charging strategy.
6. A battery charging system, comprising:
the system comprises a charging starting management module, a charging starting management module and a charging starting management module, wherein the charging starting management module is used for judging whether a vehicle meets a charging condition or not, detecting a battery open-circuit voltage value when the vehicle meets the charging condition, and judging a voltage state of a battery according to the battery open-circuit voltage value, wherein the voltage state comprises an electric quantity full-charge voltage state, an electric quantity low-voltage state and an electric quantity low-voltage state; the management module judges whether the vehicle meets the charging condition or not before the charging starts according to the vehicle state and the battery temperature information; the pre-charging management module comprises: a first state acquisition unit for acquiring vehicle state information; the first state judgment unit is used for judging whether the vehicle is in a starting state or not according to the vehicle state information; the first temperature detection unit is used for detecting the temperature information of the battery when the first state judgment unit judges that the vehicle is in the starting state; the first condition judging unit is used for judging whether the battery meets the charging condition or not according to the battery temperature information; the voltage detection unit is used for detecting the open-circuit voltage value of the battery when the first condition judgment unit judges that the battery does not accord with the charging condition; the voltage judging unit is used for judging the voltage state of the battery according to the battery open-circuit voltage value;
the pulse charging module is used for carrying out pulse charging on the battery through a pulse charging strategy when the battery is in a state of full electric quantity and full voltage; the pulse charging module performs pulse charging on the battery according to the vehicle state and the battery temperature information;
the non-voltage over-low constant current charging module is used for performing constant current charging on the battery through a non-voltage over-low constant current charging strategy when the battery is in a state of low electric quantity and low voltage; the non-undervoltage constant current charging module performs constant current charging on the battery according to the vehicle state and the battery temperature information;
the low-voltage constant-current charging module is used for performing constant-current charging on the battery through a low-voltage constant-current charging strategy when the battery is in a state of low electric quantity and low voltage; and the over-low voltage constant current charging module performs constant current charging on the battery according to the temperature information of the battery.
7. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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