CN116923121B - Early warning method for charging current of electric bicycle - Google Patents
Early warning method for charging current of electric bicycle Download PDFInfo
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- CN116923121B CN116923121B CN202311181983.9A CN202311181983A CN116923121B CN 116923121 B CN116923121 B CN 116923121B CN 202311181983 A CN202311181983 A CN 202311181983A CN 116923121 B CN116923121 B CN 116923121B
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Classifications
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/12—Measuring rate of change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of electric bicycle charging safety, in particular to an electric bicycle charging current early warning method, which comprises the following steps that S1, when a battery of an electric bicycle is charged by a charger, a central control module judges whether the charging state of the electric bicycle accords with a preset standard or not according to an obtained current value; step S2, the central control module judges whether to control the alarm module to send out alarm information aiming at unstable electric power of the charging pile according to the obtained change condition of the current value; step S3, the central control module judges the reason that the charging state of the electric bicycle does not accord with the preset standard according to the acquired temperature; and S4, when the central control module judges that the charging state of the electric bicycle meets the preset standard, controlling the charger to maintain the current operation parameters. The safety of electric bicycle charging is improved.
Description
Technical Field
The invention relates to the technical field of electric bicycle charging safety, in particular to an electric bicycle charging current early warning method.
Background
Electric bicycle charging is often spread in greenhouses, corners or corridors, etc., and its dc batteries are scattered in disorder and in close proximity to inflammables, which can easily cause fire if there is an electrical safety hazard. The potential safety hazard of electric bicycle charging is mainly caused by the conditions of battery capacity reduction, charger aging, unstable charging voltage and the like. With the expansion of the installation scale of electric bicycle charging, the fire problem caused by electric bicycle charging is increasing.
At present, to electric bicycle battery charging electrical safety hidden danger detection, domestic and foreign research mainly includes: establishing a charging electrical potential safety hazard model, extracting time-frequency characteristics and formulating a mixing criterion based on multi-resolution wavelet transformation; analyzing arc characteristics by utilizing a wavelet packet and constructing a time-frequency characteristic plane to detect potential safety hazards of charging electricity; and extracting the characteristics of the potential safety hazards of the charging electricity by adopting a method combining EEMD decomposition and fuzzy entropy, and finally realizing detection of the potential safety hazards of the charging electricity by utilizing an FCM algorithm. The research mainly obtains the characteristics of potential safety hazards of charging through wavelet transformation or empirical mode decomposition, requires a complex signal processing algorithm and a signal sampling rate of hundreds of kHz, has high requirements on hardware, and exceeds the sampling capacity of a common DSP.
The electric bicycle battery charging system can possibly generate electric fire, and the electric potential safety hazard is connected with the loop in series, so that overcurrent can not be generated, the circuit breaker is not easy to act, and if the electric potential safety hazard can not be detected and eliminated in time, the continuous existence of the electric potential safety hazard can easily cause fire accidents. Therefore, how to better detect the electric potential safety hazard of battery charging of the electric bicycle has important significance for solving the battery charging of the electric bicycle and promoting the development of the battery industry in China.
Chinese patent publication No.: CN115980519a discloses a method and a system for early warning of potential safety hazards of electric bicycle charging, comprising the following steps: the signal conditioning unit is used for acquiring a small voltage signal through a resistor after the phase current transformer and the zero sequence current transformer output current signals, and the voltage signal is subjected to filtering treatment; the A/D sampling unit is used for realizing synchronous sampling of three-phase voltage, three-phase current and zero sequence current; the microprocessor unit is used for improving development efficiency, and an ecological system STM32CubeMX is developed through the extended STM32 microcontroller, so that an advanced artificial intelligence AI function is increased; it follows that the prior art has the following problems: the mobility of the electric bicycle is not considered, the electric bicycle cannot be detected in all aspects under different charging scenes, different standards for determining the charging state of the electric bicycle according to actual specific charging scenes are not considered, the sensitivity of potential safety hazard detection is affected, and the charging safety of the electric bicycle is affected.
Disclosure of Invention
Therefore, the invention provides a charging current early warning method for an electric bicycle, which is used for solving the problems that the mobility of the electric bicycle is not considered, the electric bicycle cannot be detected in all aspects under different charging scenes, different standards for determining the charging state of the electric bicycle according to actual specific charging scenes are not considered, the sensitivity of potential safety hazard detection is affected, and the charging safety of the electric bicycle is affected in the prior art.
In order to achieve the above object, the present invention provides a method for early warning charging current of an electric bicycle, comprising:
step S1, when a battery of an electric bicycle is charged by a charger, a central control module judges whether the charging state of the electric bicycle meets a preset standard according to a current value obtained by a current sensor arranged at a charging input end of the battery;
step S2, when the central control module preliminarily judges that the charging state of the electric bicycle does not meet the preset standard, the current sensor is controlled to continuously acquire the current value of the charging input end of the battery, so that whether the alarm module is controlled to send alarm information aiming at unstable electric power of the charging pile is judged according to the acquired change condition of the current value;
step S3, when the central control module judges that the charging state of the electric bicycle does not meet the preset standard, controlling the charger to adjust the charging current of the charger to the battery to a corresponding value, and after the charging current is adjusted and the charger operates for a preset period of time at the adjusted charging current, judging the reason that the charging state of the electric bicycle does not meet the preset standard according to the temperature acquired by the temperature detector arranged on the battery by the central control module so as to judge whether to control the alarm module to send alarm information aiming at the failure of the charger;
And S4, when the central control module judges that the charging state of the electric bicycle meets the preset standard, controlling the charger to maintain the current operation parameters.
Further, when the battery of the electric bicycle is charged by the charger, the central control module determines whether the charging state of the electric bicycle meets a state judgment mode of a preset standard according to a current value obtained by a current sensor arranged at a charging input end of the battery, wherein:
the first state judgment mode is that the central control module preliminarily judges that the charging state of the electric bicycle does not accord with a preset standard, the central control module controls the current sensor to continuously acquire a current value of a charging input end of the battery, and judges whether the charging state of the electric bicycle accords with the preset standard or not for the second time according to the change condition of the acquired current value; the first state judgment mode meets the condition that the acquired current value is smaller than or equal to a first preset current value;
the second state judgment mode is that the central control module judges that the charging state of the electric bicycle meets a preset standard and controls the charger to maintain the current running parameters; the second state judgment mode meets the requirements that the acquired current value is smaller than or equal to a second preset current value and larger than the first preset current value, and the first preset current value is smaller than the second preset current value;
The third state judging mode is that the central control module judges that the charging state of the electric bicycle does not meet the preset standard, the central control module adjusts the charging current of the battery by the charger to a corresponding value according to the difference value between the current value and the second preset current value, and after the charging current is adjusted and the charger operates for a preset period of time with the adjusted charging current, the central control module judges the reason that the charging state of the electric bicycle does not meet the preset standard according to the acquired temperature of the battery; the third state judgment mode satisfies that the acquired current value is larger than the second preset current value.
Further, the central control module calculates a difference value between the current value and a second preset current value in the third state judgment mode, marks the difference value as a current difference value, and determines a current regulation mode of charging current of the battery by the charger according to the obtained current difference value, wherein:
the first current regulation mode is that the central control module uses a first preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the first current regulation mode meets the condition that the current difference value is smaller than or equal to a first preset current difference value;
The second current regulation mode is that the central control module uses a second preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the second current regulation mode meets the condition that the current difference value is smaller than or equal to a second preset current difference value and larger than the first preset current difference value, and the first preset current difference value is smaller than the second preset current difference value;
the third current regulation mode is that the central control module uses a third preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the third current adjustment mode satisfies that the current difference is greater than the second preset current difference.
Further, after the central control module completes the adjustment of the charging current in the third state determination mode and the charger operates for a preset time period with the adjusted charging current, determining a determination mode of a reason that the charging state of the electric bicycle does not meet a preset standard according to the temperature acquired by the temperature detector arranged on the battery, wherein:
the first cause judgment mode is that the reason that the central control module judges that the charging state of the electric bicycle does not accord with a preset standard is that the current sensor fails, and the central control module controls the current sensor to calibrate automatically; the first reason judging mode is that the temperature is smaller than or equal to a first preset temperature;
The second reason judging mode is that the reason that the charging state of the electric bicycle does not meet the preset standard is judged by the central control module to be that the battery fails, and the single maximum charging time length of the battery is adjusted to a corresponding value according to the difference value between the second preset temperature and the temperature; the second reason judging mode is that the temperature is smaller than or equal to a second preset temperature and larger than the first preset temperature, and the first preset temperature is smaller than the second preset temperature;
the third cause judgment mode is that the central control module judges that the charging state of the electric bicycle does not meet the preset standard because the charger fails, the central control module controls the charger to reduce the charging current of the charger to a corresponding value according to the difference value between the temperature and the second preset temperature, and controls the alarm module to send alarm information aiming at the failure of the charger; the third cause judgment mode is that the temperature is larger than the second preset temperature.
Further, the central control module is configured to control the current sensor to continuously obtain a current value of a charging input end of the battery with a preset duration in the first state determination mode, draw a duration-current value graph for the battery, calculate an average value of the duration-current value graph by the central control module, and mark a section where a difference value between the current value and the average value in the duration-current value graph is greater than a preset fluctuation value as an abnormal section, and determine a state secondary determination mode of whether the charging state of the electric bicycle meets a preset standard according to an accumulated duration of the abnormal section in the obtained duration-current value graph, where:
The first state secondary judgment mode is that the central control module judges that the charging state of the electric bicycle meets a preset standard, and controls the charger to maintain the current running parameters; the first state secondary judgment mode meets the condition that the accumulated time length is smaller than or equal to a preset accumulated time length;
the second state secondary judgment mode is that the central control module judges that the charging state of the electric bicycle does not accord with a preset standard, and controls the alarm module to send alarm information aiming at unstable charging pile current; the second state secondary judgment mode meets the condition that the accumulated time length is greater than the preset accumulated time length.
Further, when the charger starts to charge the battery of the electric bicycle, the central control module determines a standard adjustment mode for a second preset current value according to the input current value acquired by the input current sensor arranged at the current input end of the charger, wherein:
the first standard adjusting mode is that the central control module adjusts the second preset current value by using a first preset standard adjusting coefficient; the first standard regulation mode meets the condition that the input current value is smaller than or equal to a first preset input current value;
the second standard adjusting mode is that the central control module adjusts the second preset current value by using a second preset standard adjusting coefficient; the second standard regulation mode meets the condition that the input current value is smaller than or equal to a second preset input current value and larger than the first preset input current value, and the first preset input current value is smaller than the second preset input current value;
The third standard adjusting mode is that the central control module adjusts the second preset current value by using a third preset standard adjusting coefficient; the third standard adjustment mode satisfies that the input current value is greater than the second preset input current value.
Further, when determining that the second preset current value is adjusted by using the ith preset standard adjustment coefficient, the central control module determines a correction mode for the ith preset standard adjustment coefficient according to an initial temperature acquired by a temperature detector arranged on the battery, wherein:
the first correction mode is that the central control module corrects an i preset standard adjustment coefficient to a corresponding value by using a first preset correction coefficient; the first correction mode meets the condition that the initial temperature is smaller than or equal to a first preset initial temperature;
the second correction mode is that the central control module corrects the i preset standard adjustment coefficient to a corresponding value by using a second preset correction coefficient; the second correction mode satisfies that the initial temperature is smaller than or equal to a second preset initial temperature and larger than the first preset initial temperature, and the first preset initial temperature is smaller than the second preset initial temperature;
the third correction mode is that the central control module corrects the i preset standard adjustment coefficient to a corresponding value by using a third preset correction coefficient; the third correction mode satisfies that the initial temperature is greater than the second preset initial temperature;
The central control module adjusts the second preset current value to a corresponding value by using the corrected corresponding i preset standard adjustment coefficient, and uses the adjusted second preset current value as a judgment standard for judging whether the charging state of the electric bicycle meets the preset standard or not.
Further, the central control module calculates a difference between a second preset temperature and the temperature in the second cause judgment mode, marks the difference as a temperature difference, and determines a duration adjustment mode for a single maximum charging duration of the battery according to the obtained temperature difference, wherein:
the first time length adjusting mode is that the central control module uses a first preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the first time length adjusting mode meets the condition that the temperature difference value is smaller than or equal to a first preset temperature difference value;
the second time length adjusting mode is that the central control module uses a second preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the second time length adjusting mode meets the condition that the temperature difference value is smaller than or equal to a second preset temperature difference value and larger than the first preset temperature difference value, and the first preset temperature difference value is smaller than the second preset temperature difference value;
The third time length adjusting mode is that the central control module uses a third preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the third time length adjusting mode meets the condition that the temperature difference value is larger than the second preset temperature difference value.
Further, the central control module determines an adjustment mode for charging current of the battery by the charger according to the calculated difference value between the temperature and the second preset temperature in the third factor determination mode, wherein:
the first adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a first preset adjusting coefficient; the first regulation mode meets the condition that the difference value between the temperature and the second preset temperature is smaller than or equal to a first preset difference value;
the second adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a second preset adjusting coefficient; the second regulation mode meets the condition that the difference value between the temperature and the second preset temperature is smaller than or equal to a second preset difference value and larger than the first preset difference value, and the first preset difference value is smaller than the second preset difference value;
the third adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a third preset adjusting coefficient; the third adjustment mode satisfies that the difference between the temperature and the second preset temperature is greater than the second preset difference.
Further, the central control module is used for primarily charging the battery until the alarm module arranged on the battery primarily sends out alarm information aiming at the occurrence of faults of the charger, the time length is marked as fault time length, the central control module is used for comparing the fault time length with the preset fault time length, and if the fault time length is longer than the preset fault time length, the central control module is used for controlling the charger to maintain the operation parameters after adjustment; if the fault duration is less than or equal to the preset fault duration, the central control module marks the battery and the corresponding chargers of the battery as abnormal charging devices, and sends marking information to the production terminal, and a terminal controller arranged at the production terminal calculates the received specific gravity marked as the number of the abnormal charging devices and the total number of the chargers produced by the production terminal, and marks the specific gravity as abnormal specific gravity;
the terminal controller compares the abnormal specific gravity with a preset abnormal specific gravity, and if the abnormal specific gravity is greater than the preset abnormal specific gravity, the terminal controller controls an alarm arranged at the production terminal to send out alarm information for abnormal production; and if the abnormal specific gravity is less than or equal to the preset abnormal specific gravity, the alarm does not send out alarm information.
Compared with the prior art, the method has the beneficial effects that whether the charging state meets different standards of the preset standard is determined according to different charging environments of the electric bicycle, the charging environment temperature is the initial temperature, the output current of the charging pile is the input current value, the charging state is judged, namely the risk of fire disaster is increased when the temperature of the charging environment is higher, the different standards of the charging state of the electric bicycle are determined according to the actual specific charging scene, the sensitivity of detecting potential safety hazards is effectively improved, and the charging safety of the electric bicycle is further improved.
Further, judging the charging state of the electric bicycle according to the current of the charging input end of the battery, detecting the change condition of the current value, namely the stability of the current value when the current value is too low, and judging that the charging state meets the preset standard because the battery is about to be fully charged and the current value is low under the normal condition if the accumulated duration of the abnormal section in the drawn duration-current value graph is lower than the preset accumulated duration, namely the change condition of the current value is stable; if the accumulated time length is longer than the preset accumulated time length, the fact that the current value is unstable due to unstable power supply of the charging pile is judged, so that the alarm module sends alarm information aiming at the unstable current of the charging pile to prompt a user to replace the charging pile, the charging pile is monitored aiming at the current value to monitor the charging state, and the charging pile which is safe in use of the electric bicycle is ensured, and meanwhile the charging safety of the electric bicycle is further improved.
Further, the detection equipment and the judgment equipment for the charging safety of the electric bicycle are arranged on the battery and the charger, so that the problems of high mobility and diversity of charging places of the electric bicycle can be effectively solved, the electric bicycle is comprehensively detected under different charging scenes, and the charging safety of the electric bicycle is further improved.
Further, when the current value obtained by the current sensor is judged to be too large, the charger timely controls the current, namely the charger regulates the charging current of the battery to be a corresponding value, and judges the reason that the charging state does not accord with the preset standard according to the temperature of the battery after regulating the charging current, so that when the obtained temperature of the battery is low, the current sensor is automatically calibrated, and inaccurate detection caused by the occurrence of faults of the current sensor is avoided; when the temperature of the battery is higher, the battery is judged to have faults, and the single maximum charging time length is adjusted so as to reduce the occurrence of fire caused by the overhigh temperature; the battery is provided with a preset single maximum charging duration, and when the battery is charged for a single time, if the single charging duration is equal to the single maximum charging duration, the battery automatically stops receiving the electric energy; when the temperature of the battery is extremely high, the charging machine is controlled to regulate the charging current down again, the charging parameters of the charging machine are controlled in time, and the alarm module is controlled to send out alarm information aiming at the occurrence of faults of the charging machine, so that a user is prompted to overhaul the electric bicycle in time, and the charging hidden danger of the electric bicycle is reduced in time, and meanwhile, the charging safety of the electric bicycle is further improved.
Further, the detector and the central control module are arranged on the battery and the charger through the electric bicycle manufacturer to monitor each arranged electric bicycle in a targeted manner, so that the electric bicycle can be safely ensured no matter in any charging occasion, the battery and the charger produced by the manufacturer are monitored in a full coverage manner, and when a large number of mistakes occur on the battery and the charger produced by the manufacturer, the manufacturer is warned, so that the manufacturer can check the electric bicycle conveniently; further strengthening the handle control of manufacturers on the production quality so as to improve the safety of the electric bicycle.
Drawings
FIG. 1 is a flowchart illustrating steps of a method for early warning a charging current of an electric bicycle according to an embodiment of the present invention;
fig. 2 is a flow chart of a state determining mode in which a central control module determines whether a charging state of an electric bicycle meets a preset standard according to a current value obtained by a current sensor arranged at a charging input end of a battery;
FIG. 3 is a flow chart of a current adjustment mode in which a central control module determines the charging current of a battery from a charger according to a calculated current difference;
fig. 4 is a flowchart of a determination method for determining a reason that the charging state of the electric bicycle does not meet a preset standard according to the obtained temperature by the central control module in the embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 2, fig. 3, and fig. 4, which are respectively a step flowchart of an early warning method for charging current of an electric bicycle according to an embodiment of the present invention, a state determining method flowchart for determining whether a charging state of the electric bicycle meets a preset standard according to a current value obtained by a current sensor disposed at a charging input end of a battery, a current adjusting method flowchart for determining a charging current of the battery by a charger according to a obtained current difference value, and a determining method flowchart for determining a reason why the charging state of the electric bicycle does not meet the preset standard according to an obtained temperature by the central control module; the embodiment of the invention discloses a charging current early warning method for an electric bicycle, which comprises the following steps:
step S1, when a battery of an electric bicycle is charged by a charger, a central control module judges whether the charging state of the electric bicycle meets a preset standard according to a current value obtained by a current sensor arranged at a charging input end of the battery;
step S2, when the central control module preliminarily judges that the charging state of the electric bicycle does not meet the preset standard, the current sensor is controlled to continuously acquire the current value of the charging input end of the battery, so that whether the alarm module is controlled to send alarm information aiming at unstable electric power of the charging pile is judged according to the acquired change condition of the current value;
Step S3, when the central control module judges that the charging state of the electric bicycle does not meet the preset standard, controlling the charger to adjust the charging current of the charger to the battery to a corresponding value, and after the charging current is adjusted and the charger operates for a preset period of time at the adjusted charging current, judging the reason that the charging state of the electric bicycle does not meet the preset standard according to the temperature acquired by the temperature detector arranged on the battery by the central control module so as to judge whether to control the alarm module to send alarm information aiming at the failure of the charger;
and S4, when the central control module judges that the charging state of the electric bicycle meets the preset standard, controlling the charger to maintain the current operation parameters.
Specifically, when the battery of the electric bicycle is charged by the charger, the central control module determines whether the charging state of the electric bicycle meets a state judgment mode of a preset standard according to a current value obtained by a current sensor arranged at a charging input end of the battery, wherein:
the first state judgment mode is that the central control module preliminarily judges that the charging state of the electric bicycle does not accord with a preset standard, the central control module controls the current sensor to continuously acquire a current value of a charging input end of the battery, and judges whether the charging state of the electric bicycle accords with the preset standard or not for the second time according to the change condition of the acquired current value; the first state judgment mode meets the condition that the acquired current value is smaller than or equal to a first preset current value;
The second state judgment mode is that the central control module judges that the charging state of the electric bicycle meets a preset standard and controls the charger to maintain the current running parameters; the second state judgment mode meets the requirements that the acquired current value is smaller than or equal to a second preset current value and larger than the first preset current value, and the first preset current value is smaller than the second preset current value;
the third state judging mode is that the central control module judges that the charging state of the electric bicycle does not meet the preset standard, the central control module adjusts the charging current of the battery by the charger to a corresponding value according to the difference value between the current value and the second preset current value, and after the charging current is adjusted and the charger operates for a preset period of time with the adjusted charging current, the central control module judges the reason that the charging state of the electric bicycle does not meet the preset standard according to the acquired temperature of the battery; the third state judgment mode satisfies that the acquired current value is larger than the second preset current value.
Wherein the first preset current value is 3A, and the second preset current value is 12A.
Specifically, the central control module calculates a difference value between the current value and a second preset current value in the third state judgment mode, marks the difference value as a current difference value, and determines a current regulation mode of charging current of the battery by the charger according to the obtained current difference value, wherein:
The first current regulation mode is that the central control module uses a first preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the first current regulation mode meets the condition that the current difference value is smaller than or equal to a first preset current difference value;
the second current regulation mode is that the central control module uses a second preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the second current regulation mode meets the condition that the current difference value is smaller than or equal to a second preset current difference value and larger than the first preset current difference value, and the first preset current difference value is smaller than the second preset current difference value;
the third current regulation mode is that the central control module uses a third preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the third current adjustment mode satisfies that the current difference is greater than the second preset current difference.
The first preset current difference value is 2A, the second preset current difference value is 5A, the first preset current adjustment coefficient is 0.9, the second preset current adjustment coefficient is 0.8, and the third preset current adjustment coefficient is 0.7.
Specifically, after the central control module completes the adjustment of the charging current in the third state determination mode and the charger operates for a preset time period with the adjusted charging current, determining a determination mode of a reason that the charging state of the electric bicycle does not meet a preset standard according to the temperature acquired by the temperature detector arranged on the battery, wherein:
The first cause judgment mode is that the reason that the central control module judges that the charging state of the electric bicycle does not accord with a preset standard is that the current sensor fails, and the central control module controls the current sensor to calibrate automatically; the first reason judging mode is that the temperature is smaller than or equal to a first preset temperature;
the second reason judging mode is that the reason that the charging state of the electric bicycle does not meet the preset standard is judged by the central control module to be that the battery fails, and the single maximum charging time length of the battery is adjusted to a corresponding value according to the difference value between the second preset temperature and the temperature; the second reason judging mode is that the temperature is smaller than or equal to a second preset temperature and larger than the first preset temperature, and the first preset temperature is smaller than the second preset temperature;
the third cause judgment mode is that the central control module judges that the charging state of the electric bicycle does not meet the preset standard because the charger fails, the central control module controls the charger to reduce the charging current of the charger to a corresponding value according to the difference value between the temperature and the second preset temperature, and controls the alarm module to send alarm information aiming at the failure of the charger; the third cause judgment mode is that the temperature is larger than the second preset temperature.
Wherein the first preset temperature is 35 ℃, the second preset temperature is 45 ℃,
specifically, the central control module controls the current sensor to continuously acquire a current value of a charging input end of a battery with preset duration in the first state judging mode, draws a duration-current value graph for the battery, calculates an average value of the duration-current value graph, marks a section with a difference value between the current value and the average value in the duration-current value graph being greater than a preset fluctuation value as an abnormal section, and determines a state secondary judging mode of whether the charging state of the electric bicycle meets a preset standard according to the accumulated duration of the abnormal section in the acquired duration-current value graph, wherein:
the first state secondary judgment mode is that the central control module judges that the charging state of the electric bicycle meets a preset standard, and controls the charger to maintain the current running parameters; the first state secondary judgment mode meets the condition that the accumulated time length is smaller than or equal to a preset accumulated time length;
the second state secondary judgment mode is that the central control module judges that the charging state of the electric bicycle does not accord with a preset standard, and controls the alarm module to send alarm information aiming at unstable charging pile current; the second state secondary judgment mode meets the condition that the accumulated time length is greater than the preset accumulated time length.
The preset accumulated time length is 120S;
specifically, when the charger starts to charge the battery of the electric bicycle, the central control module determines a standard adjustment mode for a second preset current value according to the input current value acquired by the input current sensor arranged at the current input end of the charger, wherein:
the first standard adjusting mode is that the central control module adjusts the second preset current value by using a first preset standard adjusting coefficient; the first standard regulation mode meets the condition that the input current value is smaller than or equal to a first preset input current value;
the second standard adjusting mode is that the central control module adjusts the second preset current value by using a second preset standard adjusting coefficient; the second standard regulation mode meets the condition that the input current value is smaller than or equal to a second preset input current value and larger than the first preset input current value, and the first preset input current value is smaller than the second preset input current value;
the third standard adjusting mode is that the central control module adjusts the second preset current value by using a third preset standard adjusting coefficient; the third standard adjustment mode satisfies that the input current value is greater than the second preset input current value.
The first preset input current value is 16A, the second preset input current value is 32A, the first preset standard regulating coefficient is 0.99, the second preset standard regulating coefficient is 0.95, and the third preset standard regulating coefficient is 0.8.
Specifically, when determining that the second preset current value is adjusted by using the ith preset standard adjustment coefficient, the central control module determines a correction mode for the ith preset standard adjustment coefficient according to an initial temperature acquired by a temperature detector arranged on the battery, wherein:
the first correction mode is that the central control module corrects an i preset standard adjustment coefficient to a corresponding value by using a first preset correction coefficient; the first correction mode meets the condition that the initial temperature is smaller than or equal to a first preset initial temperature;
the second correction mode is that the central control module corrects the i preset standard adjustment coefficient to a corresponding value by using a second preset correction coefficient; the second correction mode satisfies that the initial temperature is smaller than or equal to a second preset initial temperature and larger than the first preset initial temperature, and the first preset initial temperature is smaller than the second preset initial temperature;
the third correction mode is that the central control module corrects the i preset standard adjustment coefficient to a corresponding value by using a third preset correction coefficient; the third correction mode satisfies that the initial temperature is greater than the second preset initial temperature;
The central control module adjusts the second preset current value to a corresponding value by using the corrected corresponding i preset standard adjustment coefficient, and uses the adjusted second preset current value as a judgment standard for judging whether the charging state of the electric bicycle meets the preset standard or not.
Wherein the first preset initial temperature is 25 ℃, the second preset initial temperature is 36 ℃, the first preset correction coefficient is 0.99, the second preset correction coefficient is 0.97, and the third preset correction coefficient is 0.95.
Specifically, the central control module calculates a difference between a second preset temperature and the temperature in the second cause judgment mode, marks the difference as a temperature difference, and determines a duration adjustment mode for a single maximum charging duration of the battery according to the obtained temperature difference, wherein:
the first time length adjusting mode is that the central control module uses a first preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the first time length adjusting mode meets the condition that the temperature difference value is smaller than or equal to a first preset temperature difference value;
the second time length adjusting mode is that the central control module uses a second preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the second time length adjusting mode meets the condition that the temperature difference value is smaller than or equal to a second preset temperature difference value and larger than the first preset temperature difference value, and the first preset temperature difference value is smaller than the second preset temperature difference value;
The third time length adjusting mode is that the central control module uses a third preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the third time length adjusting mode meets the condition that the temperature difference value is larger than the second preset temperature difference value.
The first preset temperature difference is 5 ℃, the second preset temperature difference is 8 ℃, the first preset time length adjusting coefficient is 0.85, the second preset time length adjusting coefficient is 0.8, and the third preset time length adjusting coefficient is 0.9.
Specifically, the central control module determines, in the third cause determination mode, an adjustment mode for a charging current of the battery by the charger according to a calculated difference value between the temperature and the second preset temperature, wherein:
the first adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a first preset adjusting coefficient; the first regulation mode meets the condition that the difference value between the temperature and the second preset temperature is smaller than or equal to a first preset difference value;
the second adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a second preset adjusting coefficient; the second regulation mode meets the condition that the difference value between the temperature and the second preset temperature is smaller than or equal to a second preset difference value and larger than the first preset difference value, and the first preset difference value is smaller than the second preset difference value;
The third adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a third preset adjusting coefficient; the third adjustment mode satisfies that the difference between the temperature and the second preset temperature is greater than the second preset difference.
Wherein the first preset difference is 3 ℃, the second preset difference is 6 ℃, the first preset adjustment coefficient is 0.9, the second preset adjustment coefficient is 0.8, and the third preset adjustment coefficient is 0.7.
Specifically, the central control module primarily charges the battery until the alarm module arranged on the battery primarily sends out alarm information aiming at the occurrence of faults of the charger, the time length is marked as fault time length, the central control module compares the fault time length with the preset fault time length, and if the fault time length is longer than the preset fault time length, the central control module controls the charger to maintain the operation parameters after adjustment; if the fault duration is less than or equal to the preset fault duration, the central control module marks the battery and the corresponding chargers of the battery as abnormal charging devices, and sends marking information to the production terminal, and a terminal controller arranged at the production terminal calculates the received specific gravity marked as the number of the abnormal charging devices and the total number of the chargers produced by the production terminal, and marks the specific gravity as abnormal specific gravity;
The terminal controller compares the abnormal specific gravity with a preset abnormal specific gravity, and if the abnormal specific gravity is greater than the preset abnormal specific gravity, the terminal controller controls an alarm arranged at the production terminal to send out alarm information for abnormal production; and if the abnormal specific gravity is less than or equal to the preset abnormal specific gravity, the alarm does not send out alarm information.
Wherein the preset fault duration is 7 years, and the preset abnormal specific gravity is 0.2.
Examples
When the battery starts to charge the battery, an input current value obtained by an input current sensor arranged at a current input end of the battery is 32A, a central control module uses a second preset standard adjustment coefficient of 0.95 to adjust the second preset current value, a temperature detector arranged on the battery obtains an initial temperature of-3 ℃, the central control module uses a first preset correction coefficient of 0.99 to correct the second preset standard adjustment coefficient to 0.94, the central control module uses the corrected second preset standard adjustment coefficient of 0.94 to correct the second preset current value 11A to 11.28A, the central control module controls the current sensor arranged at the charging input end of the battery to obtain a current value of 25A, the central control module calculates a current difference value of 13.72A, and the central control module uses a third preset current adjustment coefficient of 0.7 to adjust the charging current of the battery by the battery; after the battery charger runs for 7min with the regulated charging current, the temperature detector arranged on the battery acquires the temperature of 46 ℃, the central control module judges that the reason that the charging state of the electric bicycle does not meet the preset standard is that the battery charger fails, the central control module calculates that the difference between the temperature and the second preset temperature is 1 ℃, the central control module uses the first preset regulating coefficient of 0.9 to regulate the charging current of the battery charger to a corresponding value and control the alarm module to send out alarm information aiming at the failure of the battery charger, the central control module detects that the electric bicycle is the alarm information which is sent out for the failure of the battery charger for the first time, the central control module marks the time of the battery which is charged to the alarm module arranged on the battery for the first time and acquires the failure time as the failure time, the central control module marks the battery charger corresponding to the battery and the battery charger as an abnormal charging device and sends the marking information to the production terminal, the terminal controller arranged on the production terminal generates the specific gravity of 0.17 of the quantity of the received marked abnormal charging device and the total quantity of the battery charger produced by the production terminal, and the alarm information is not sent out at the production terminal.
Examples
When the battery is charged by the charger, an input current value obtained by an input current sensor arranged at a current input end of the charger is 16A, a central control module uses a first preset standard adjustment coefficient 0.99 to adjust a second preset current value, a temperature detector arranged on the battery obtains an initial temperature of 27 ℃, the central control module uses a second preset correction coefficient 0.97 to correct the second preset standard adjustment coefficient to 0.96, the central control module uses the corrected second preset standard adjustment coefficient 0.96 to correct the second preset current value 11A to 10.56A, and the central control module judges that the charging state of the electric bicycle meets a preset standard and controls the charger to maintain the current running parameters.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an electric bicycle charging current early warning method which is characterized in that the method comprises the following steps:
step S1, when a battery of an electric bicycle is charged by a charger, a central control module judges whether the charging state of the electric bicycle meets a preset standard according to a current value obtained by a current sensor arranged at a charging input end of the battery;
step S2, when the central control module preliminarily judges that the charging state of the electric bicycle does not meet the preset standard, the current sensor is controlled to continuously acquire the current value of the charging input end of the battery, so that whether the alarm module is controlled to send alarm information aiming at unstable electric power of the charging pile is judged according to the acquired change condition of the current value;
step S3, when the central control module judges that the charging state of the electric bicycle does not meet the preset standard, controlling the charger to adjust the charging current of the charger to the battery to a corresponding value, and after the charging current is adjusted and the charger operates for a preset period of time at the adjusted charging current, judging the reason that the charging state of the electric bicycle does not meet the preset standard according to the temperature acquired by the temperature detector arranged on the battery by the central control module so as to judge whether to control the alarm module to send alarm information aiming at the failure of the charger;
Step S4, when the central control module judges that the charging state of the electric bicycle meets the preset standard, the central control module controls the charger to maintain the current operation parameters;
when the battery of the electric bicycle is charged by the charger, the central control module determines whether the charging state of the electric bicycle meets the state judgment mode of a preset standard according to the current value acquired by the current sensor arranged at the charging input end of the battery, wherein:
the first state judgment mode is that the central control module preliminarily judges that the charging state of the electric bicycle does not accord with a preset standard, the central control module controls the current sensor to continuously acquire a current value of a charging input end of the battery, and judges whether the charging state of the electric bicycle accords with the preset standard or not for the second time according to the change condition of the acquired current value; the first state judgment mode meets the condition that the acquired current value is smaller than or equal to a first preset current value;
the second state judgment mode is that the central control module judges that the charging state of the electric bicycle meets a preset standard and controls the charger to maintain the current running parameters; the second state judgment mode meets the requirements that the acquired current value is smaller than or equal to a second preset current value and larger than the first preset current value, and the first preset current value is smaller than the second preset current value;
The third state judging mode is that the central control module judges that the charging state of the electric bicycle does not meet the preset standard, the central control module adjusts the charging current of the battery by the charger to a corresponding value according to the difference value between the current value and the second preset current value, and after the charging current is adjusted and the charger operates for a preset period of time with the adjusted charging current, the central control module judges the reason that the charging state of the electric bicycle does not meet the preset standard according to the acquired temperature of the battery; the third state judgment mode meets the condition that the acquired current value is larger than the second preset current value;
the central control module calculates the difference value between the current value and a second preset current value in the third state judgment mode, marks the difference value as a current difference value, and determines a current regulation mode of the charging machine to the charging current of the battery according to the obtained current difference value, wherein:
the first current regulation mode is that the central control module uses a first preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the first current regulation mode meets the condition that the current difference value is smaller than or equal to a first preset current difference value;
The second current regulation mode is that the central control module uses a second preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the second current regulation mode meets the condition that the current difference value is smaller than or equal to a second preset current difference value and larger than the first preset current difference value, and the first preset current difference value is smaller than the second preset current difference value;
the third current regulation mode is that the central control module uses a third preset current regulation coefficient to regulate the charging current of the battery to a corresponding value by the charger; the third current adjustment mode satisfies that the current difference is greater than the second preset current difference;
after the central control module completes the adjustment of the charging current in the third state judgment mode and the charger operates for a preset time period with the adjusted charging current, the judgment mode of the reason that the charging state of the electric bicycle does not accord with the preset standard is determined according to the temperature acquired by the temperature detector arranged on the battery, wherein:
the first cause judgment mode is that the reason that the central control module judges that the charging state of the electric bicycle does not accord with a preset standard is that the current sensor fails, and the central control module controls the current sensor to calibrate automatically; the first reason judging mode is that the temperature is smaller than or equal to a first preset temperature;
The second reason judging mode is that the reason that the charging state of the electric bicycle does not meet the preset standard is judged by the central control module to be that the battery fails, and the single maximum charging time length of the battery is adjusted to a corresponding value according to the difference value between the second preset temperature and the temperature; the second reason judging mode is that the temperature is smaller than or equal to a second preset temperature and larger than the first preset temperature, and the first preset temperature is smaller than the second preset temperature;
the third cause judgment mode is that the central control module judges that the charging state of the electric bicycle does not meet the preset standard because the charger fails, the central control module controls the charger to reduce the charging current of the charger to a corresponding value according to the difference value between the temperature and the second preset temperature, and controls the alarm module to send alarm information aiming at the failure of the charger; the third cause judgment mode is that the temperature is larger than the second preset temperature.
2. The method for early warning the charging current of the electric bicycle according to claim 1, wherein the central control module controls the current sensor to continuously acquire the current value of the charging input end of the battery with a preset duration in the first state judging mode, and draws a duration-current value curve graph for the battery, the central control module calculates the average value of the duration-current value curve graph to mark a section, in which the difference value between the current value and the average value in the duration-current value curve graph is greater than a preset fluctuation value, as an abnormal section, and the central control module determines a state secondary judging mode whether the charging state of the electric bicycle meets a preset standard according to the accumulated duration of the abnormal section in the acquired duration-current value curve graph, wherein:
The first state secondary judgment mode is that the central control module judges that the charging state of the electric bicycle meets a preset standard, and controls the charger to maintain the current running parameters; the first state secondary judgment mode meets the condition that the accumulated time length is smaller than or equal to a preset accumulated time length;
the second state secondary judgment mode is that the central control module judges that the charging state of the electric bicycle does not accord with a preset standard, and controls the alarm module to send alarm information aiming at unstable charging pile current; the second state secondary judgment mode meets the condition that the accumulated time length is greater than the preset accumulated time length.
3. The method for early warning of charging current of electric bicycle according to claim 2, wherein the central control module determines a standard adjustment mode for a second preset current value according to an input current value obtained by an input current sensor arranged at a current input end of the charger when the charger starts charging the battery of the electric bicycle, wherein:
the first standard adjusting mode is that the central control module adjusts the second preset current value by using a first preset standard adjusting coefficient; the first standard regulation mode meets the condition that the input current value is smaller than or equal to a first preset input current value;
The second standard adjusting mode is that the central control module adjusts the second preset current value by using a second preset standard adjusting coefficient; the second standard regulation mode meets the condition that the input current value is smaller than or equal to a second preset input current value and larger than the first preset input current value, and the first preset input current value is smaller than the second preset input current value;
the third standard adjusting mode is that the central control module adjusts the second preset current value by using a third preset standard adjusting coefficient; the third standard adjustment mode satisfies that the input current value is greater than the second preset input current value.
4. The electric bicycle charging current early warning method according to claim 3, wherein the central control module determines a correction mode for an i-th preset standard adjustment coefficient according to an initial temperature acquired by a temperature detector provided on the battery when determining that the second preset current value is adjusted using the i-th preset standard adjustment coefficient, wherein:
the first correction mode is that the central control module corrects an i preset standard adjustment coefficient to a corresponding value by using a first preset correction coefficient; the first correction mode meets the condition that the initial temperature is smaller than or equal to a first preset initial temperature;
The second correction mode is that the central control module corrects the i preset standard adjustment coefficient to a corresponding value by using a second preset correction coefficient; the second correction mode satisfies that the initial temperature is smaller than or equal to a second preset initial temperature and larger than the first preset initial temperature, and the first preset initial temperature is smaller than the second preset initial temperature;
the third correction mode is that the central control module corrects the i preset standard adjustment coefficient to a corresponding value by using a third preset correction coefficient; the third correction mode satisfies that the initial temperature is greater than the second preset initial temperature;
the central control module adjusts the second preset current value to a corresponding value by using the corrected corresponding i preset standard adjustment coefficient, and uses the adjusted second preset current value as a judgment standard for judging whether the charging state of the electric bicycle meets the preset standard or not.
5. The method for early warning of electric bicycle charging current according to claim 4, wherein the central control module calculates a difference between a second preset temperature and the temperature in the second cause determination mode, and marks the difference as a temperature difference, and the central control module determines a duration adjustment mode for a single maximum charging duration of the battery according to the obtained temperature difference, wherein:
The first time length adjusting mode is that the central control module uses a first preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the first time length adjusting mode meets the condition that the temperature difference value is smaller than or equal to a first preset temperature difference value;
the second time length adjusting mode is that the central control module uses a second preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the second time length adjusting mode meets the condition that the temperature difference value is smaller than or equal to a second preset temperature difference value and larger than the first preset temperature difference value, and the first preset temperature difference value is smaller than the second preset temperature difference value;
the third time length adjusting mode is that the central control module uses a third preset time length adjusting coefficient to adjust the single maximum charging time length of the battery down to a corresponding value; the third time length adjusting mode meets the condition that the temperature difference value is larger than the second preset temperature difference value.
6. The method of claim 5, wherein the central control module determines an adjustment mode for charging current of the battery by the charger according to the calculated difference between the temperature and the second preset temperature in the third cause determination mode, wherein:
The first adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a first preset adjusting coefficient; the first regulation mode meets the condition that the difference value between the temperature and the second preset temperature is smaller than or equal to a first preset difference value;
the second adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a second preset adjusting coefficient; the second regulation mode meets the condition that the difference value between the temperature and the second preset temperature is smaller than or equal to a second preset difference value and larger than the first preset difference value, and the first preset difference value is smaller than the second preset difference value;
the third adjusting mode is that the central control module adjusts the charging current of the battery to a corresponding value by using a third preset adjusting coefficient; the third adjustment mode satisfies that the difference between the temperature and the second preset temperature is greater than the second preset difference.
7. The method for early warning the charging current of the electric bicycle according to claim 6, wherein the time length from the initial charging of the battery by the central control module to the initial sending of the alarm information for the failure of the charger by the alarm module arranged on the battery is marked as the failure time length, the central control module compares the failure time length with the preset failure time length, and if the failure time length is longer than the preset failure time length, the central control module controls the operation of the charger to maintain the adjusted operation parameters; if the fault duration is less than or equal to the preset fault duration, the central control module marks the battery and the corresponding chargers of the battery as abnormal charging devices, and sends marking information to the production terminal, and a terminal controller arranged at the production terminal calculates the received specific gravity marked as the number of the abnormal charging devices and the total number of the chargers produced by the production terminal, and marks the specific gravity as abnormal specific gravity;
The terminal controller compares the abnormal specific gravity with a preset abnormal specific gravity, and if the abnormal specific gravity is greater than the preset abnormal specific gravity, the terminal controller controls an alarm arranged at the production terminal to send out alarm information for abnormal production; and if the abnormal specific gravity is less than or equal to the preset abnormal specific gravity, the alarm does not send out alarm information.
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