CN113910979B - Electric vehicle battery control method, system, storage medium and intelligent terminal - Google Patents

Electric vehicle battery control method, system, storage medium and intelligent terminal Download PDF

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Publication number
CN113910979B
CN113910979B CN202111278340.7A CN202111278340A CN113910979B CN 113910979 B CN113910979 B CN 113910979B CN 202111278340 A CN202111278340 A CN 202111278340A CN 113910979 B CN113910979 B CN 113910979B
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battery
information
voltage
current
charging
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CN113910979A (en
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吴恩国
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Zhejiang Frank Morini New Energy Co ltd
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Zhejiang Frank Morini New Energy Co ltd
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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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/15—Preventing overcharging
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/46—Vehicles with auxiliary ad-on propulsions, e.g. add-on electric motor kits for bicycles
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The application relates to a battery control method, a system, a storage medium and an intelligent terminal of an electric vehicle, and relates to the field of battery control; if the number information of the batteries is 1, the batteries are charged or discharged; if the battery number information is 2, acquiring current working state information; judging whether the working state is a charging state or not; if the battery is in a charging state, selecting a battery with low voltage for charging until the same voltage as the battery with high voltage is reached; two groups of batteries are simultaneously started to be charged in parallel; if the battery is not in a charging state, selecting a battery with high voltage for use until the same voltage as the battery with low voltage is reached; the two groups of batteries are simultaneously started to be used in parallel. The application improves the problems that the battery is easy to be damaged and even dangerous due to high current impact, has the effect that the battery is not easy to be damaged due to current impact, and improves the safety when the double batteries are used together.

Description

Electric vehicle battery control method, system, storage medium and intelligent terminal
Technical Field
The application relates to the field of battery control, in particular to a battery control method and system for an electric vehicle, a storage medium and an intelligent terminal.
Background
The battery car is also called as an electric car, and is a pure electric car driven by a motor (direct current, alternating current, series excitation and separate excitation) and supplied with electric energy by a storage battery (a storage battery). In recent years, the method has been widely popularized in China.
The lithium battery of the traditional electric vehicle is one, so that on one hand, the endurance mileage is smaller, the single battery is larger, and in practice, the single battery mode can be set according to the demands of buyers, so that the diversification of products is realized.
In view of the above related art, the inventors believe that the two batteries have different power storage amounts after power is used, and thus a battery with high power may charge a battery with low power, and current impact is generated, which may easily damage the battery or even cause danger, and there is room for improvement.
Disclosure of Invention
In order to solve the problems that after electricity is used, two batteries have different electricity storage capacity, and then a battery with high electricity storage capacity can charge a battery with low electricity storage capacity, current impact is generated, and then the battery is easy to damage or even dangerous.
In a first aspect, the present application provides a method for controlling a battery of an electric vehicle, which adopts the following technical scheme:
A battery control method for an electric vehicle, comprising:
acquiring battery electric energy information and battery quantity information;
if the number value corresponding to the battery number information is 1, charging or discharging the battery corresponding to the battery electric energy information;
if the number value corresponding to the battery number information is 2, acquiring the current working state information;
judging whether the working state corresponding to the current working state information is a charging state or not;
if the battery is in a charging state, selecting a battery with low voltage for charging until the same voltage as the battery with high voltage is reached;
batteries corresponding to the electric energy information of the two groups of batteries are simultaneously started to be charged in parallel;
if the battery is not in a charging state, selecting a battery with high voltage for use until the same voltage as the battery with low voltage is reached;
batteries corresponding to the electric energy information of the two groups of batteries are simultaneously started to be used in parallel.
Through adopting above-mentioned technical scheme, through charging the battery that the voltage is low earlier or discharging the battery that the voltage is high, then two parallelly connected charging or discharging simultaneously for the battery that the voltage is high can not charge for the battery that the voltage is low, is difficult for producing the current surge and damages the battery, has improved the security when double cell uses jointly.
Optionally, the method for controlling the battery if the number value corresponding to the battery number information is greater than 2 includes:
sequencing the battery electric energy information of the batteries according to the voltage and defining the battery with the minimum voltage as the minimum battery information, and the battery with the highest voltage as the maximum battery information;
judging whether the working state corresponding to the current working state information is a charging state or not;
if the battery is in a charging state, charging the battery corresponding to the minimum battery information and sequencing the batteries in real time;
judging whether the number of batteries corresponding to the minimum battery information is 1;
if the battery information is 1, the battery corresponding to the minimum battery information is kept in a charging state;
if the battery information is not 1, the batteries corresponding to the minimum battery information are started in parallel for charging;
if the battery is not in the charging state, the battery corresponding to the maximum battery information is used and sequenced in real time;
judging whether the number of batteries corresponding to the maximum battery information is 1;
if the battery information is 1, the battery corresponding to the maximum battery information is kept in a use state;
if the battery information is not 1, the batteries corresponding to the maximum battery information are started to be used in parallel.
Through adopting above-mentioned technical scheme, when a plurality of batteries are used together, then the battery same voltage with the voltage that the minimum voltage was risen to the high level in proper order, then two are risen to the battery same voltage of the voltage of a bit more together, and so on until the voltage of all batteries is the same, then charge together parallelly connected for a plurality of batteries are all reasonable, are difficult for charging the battery of low voltage and damage, and vice versa when using, have improved the security when the multi-battery is used jointly.
Optionally, the method further comprises selecting the battery with high voltage for use until reaching the same voltage as the battery with low voltage, and the method comprises the following steps:
acquiring first tire rotation speed information of a battery with high voltage in the using process;
performing matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the first tire rotation speed information to determine an electric energy value corresponding to the first tire rotation speed information, and positioning the electric energy value as first converted electric energy information;
according to the charging current value stored in the preset charging current database and the battery power information, carrying out matching analysis to determine the charging current corresponding to the battery power information with low voltage, and defining the charging current as standard charging current information;
and converting the first converted electric energy information into current corresponding to the standard charging current information through the converter to charge the battery with low voltage.
Through adopting above-mentioned technical scheme, through the kinetic energy that converts the battery that the voltage is high into the electric motor car forward in the use, then with the energy that the battery that the kinetic energy was changed into low voltage charges, indirect charging for the battery of low voltage is not fragile, has improved the life of battery.
Optionally, the method for simultaneously starting the batteries corresponding to the two sets of battery power information for parallel use includes:
acquiring second tire rotation speed information of batteries corresponding to the two groups of battery electric energy information in the parallel use process;
performing matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the first tire rotation speed information to determine an electric energy value corresponding to the first tire rotation speed information, and positioning the electric energy value as second converted electric energy information;
and storing the electric energy corresponding to the second converted electric energy information for other electric equipment.
Through adopting above-mentioned technical scheme, when two sets of batteries are parallelly connected to be used, then can store unnecessary electric energy, supply other equipment to use also can reserve, the rational utilization electric energy has improved the energy conversion efficiency of battery.
Optionally, the method for jointly starting the parallel charging of the batteries corresponding to the minimum battery information includes:
acquiring charging frequency information corresponding to each battery;
performing matching analysis according to the battery capacity and the charging frequency information stored in a preset battery capacity database to determine the battery capacity corresponding to the charging frequency information, and defining the battery capacity as battery capacity information;
Acquiring the charge state information of the current battery;
if the state corresponding to the charging state information is a trickle charging state or a constant current charging state, performing matching analysis according to the constant current voltage stored in the preset charging voltage database and the battery capacity information to determine the constant current voltage corresponding to the battery capacity information, and defining the constant current voltage as constant current voltage information;
judging whether the voltage corresponding to the battery electric energy information is equal to the voltage corresponding to the constant-current voltage information or not;
if the voltage corresponding to the battery electric energy information is equal to the voltage corresponding to the constant-current voltage information, disconnecting and charging the battery corresponding to the battery electric energy information;
if the voltage corresponding to the battery electric energy information is smaller than the voltage corresponding to the constant-current voltage information, continuing to charge;
if the state corresponding to the charging state information is a constant voltage charging state or a charging termination state, performing matching analysis according to the constant voltage current stored in the preset charging current database and the battery capacity information to determine the constant voltage current corresponding to the battery capacity information, and defining the constant voltage current as constant voltage current information;
judging whether the current corresponding to the battery electric energy information is equal to the current corresponding to the constant voltage current information;
If the current corresponding to the battery electric energy information is larger than the current corresponding to the constant voltage current information, continuing to charge;
and if the current corresponding to the battery electric energy information is equal to the current corresponding to the constant voltage current information, disconnecting and charging the battery corresponding to the battery electric energy information.
By adopting the technical scheme, the service life is determined through the charging frequency information, so that the reduced maximum capacity of the battery is obtained according to the service life, the battery is disconnected when the maximum capacity is reached, the battery is prevented from being broken down in a charging state after the maximum capacity is reached, and the service life of the battery is prolonged.
Optionally, the method for opening the parallel connection of the batteries corresponding to the maximum battery information includes:
acquiring current discharge duration information;
performing matching analysis according to the discharge time length stored in the preset discharge current database and the battery capacity information to determine the discharge time length corresponding to the battery capacity information, and defining the discharge time length as reference discharge time length information;
comparing the current discharge time length information with the reference discharge time length information;
if the time length corresponding to the current discharge time length information is smaller than the reference discharge time length information, continuing to discharge;
If the time length corresponding to the current discharge time length information is equal to the reference discharge time length information, disconnecting the battery corresponding to the current discharge time length information and starting the preset standby battery for parallel use.
By adopting the technical scheme, the use duration is judged by using the capacity, and then the battery which is about to run out of the battery and the standby battery are switched and used in time, so that the battery pack can still maintain normal voltage to work, and the power supply stability of the battery pack is improved.
Optionally, a method of battery detection is also included, the method comprising:
acquiring constant voltage information of a battery in working or charging working;
comparing the battery constant voltage information with preset standard constant voltage information;
and if the constant voltage information of the battery is consistent with the preset standard constant voltage information, continuing to work or charging.
If the battery constant voltage information is inconsistent with the preset standard constant voltage information, disconnecting the battery corresponding to the battery constant voltage information, and starting the preset standby battery to charge in parallel or work in parallel and sending out an alarm.
Through adopting above-mentioned technical scheme, confirm the model of battery through judging the voltage of battery when voltage stabilization for the unable use together of battery of different models reduces the possibility that can't connect in parallel because of the model difference of battery, has improved the security that the battery used.
In a second aspect, the application provides a battery control system for an electric vehicle, which adopts the following technical scheme:
an electric vehicle battery control system, comprising:
the information acquisition module is used for acquiring battery electric energy information and battery quantity information;
the processing module is connected with the information acquisition module and the judging module and is used for storing and processing information;
the judging module is used for judging whether the working state corresponding to the current working state information is a charging state or not;
if the judging module judges that the number value corresponding to the battery number information is 1, the processing module uses the battery corresponding to the battery electric energy information to charge or discharge;
if the judging module judges that the number value corresponding to the battery number information is 2, the information acquisition module acquires the current working state information;
if the judging module judges that the current working state information is a charging state, the processing module selects a battery with low voltage to charge until the same voltage as the battery with high voltage is reached;
the processing module controls batteries corresponding to the two groups of battery electric energy information to simultaneously start parallel charging;
if the judging module judges that the current working state information is not the charging state, the processing module selects the battery with high voltage to use until the same voltage as the battery with low voltage is reached;
The processing module controls batteries corresponding to the two groups of battery electric energy information to be simultaneously started for parallel use.
Through adopting above-mentioned technical scheme, through charging the battery that the voltage is low earlier or discharging the battery that the voltage is high, then two parallelly connected charging or discharging simultaneously for the battery that the voltage is high can not charge for the battery that the voltage is low, is difficult for producing the current surge and damages the battery, has improved the security when double cell uses jointly.
In a third aspect, the present application provides an intelligent terminal, which adopts the following technical scheme:
an intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and execute any one of the electric vehicle battery control methods.
Through adopting above-mentioned technical scheme, through charging the battery that the voltage is low earlier or discharging the battery that the voltage is high, then two parallelly connected charging or discharging simultaneously for the battery that the voltage is high can not charge for the battery that the voltage is low, is difficult for producing the current surge and damages the battery, has improved the security when double cell uses jointly.
In a fourth aspect, the present application provides a computer readable storage medium capable of storing a corresponding program, which has the feature of facilitating efficient long-distance detection.
A computer readable storage medium, adopting the following technical scheme:
a computer-readable storage medium storing a computer program capable of being loaded by a processor and executing any one of the above electric vehicle battery control methods.
Through adopting above-mentioned technical scheme, through charging the battery that the voltage is low earlier or discharging the battery that the voltage is high, then two parallelly connected charging or discharging simultaneously for the battery that the voltage is high can not charge for the battery that the voltage is low, is difficult for producing the current surge and damages the battery, has improved the security when double cell uses jointly.
In summary, the present application includes at least one of the following beneficial technical effects:
the battery with high voltage can not charge the battery with low voltage, so that the battery is not easy to be damaged due to current impact, and the safety of the double batteries when the double batteries are used together is improved;
the battery is disconnected when the maximum capacity is reached, so that the battery is prevented from being broken down when the battery is still in a charged state after the maximum capacity is reached, and the service life of the battery is prolonged;
the batteries with different types cannot be used together, the possibility that the batteries cannot be used in parallel due to different types of the batteries is reduced, and the use safety of the batteries is improved.
Drawings
Fig. 1 is a flowchart of a battery control method for an electric vehicle according to an embodiment of the present application.
Fig. 2 is a flowchart of a battery control method when the number value corresponding to the battery number information is greater than 2 in the embodiment of the present application.
Fig. 3 is a flowchart of a method of selecting a high voltage battery for use until the same voltage as the low voltage battery is reached in an embodiment of the present application.
Fig. 4 is a flowchart of a method for simultaneously starting batteries corresponding to two sets of battery power information for parallel use according to an embodiment of the present application.
Fig. 5 is a flowchart of a method for commonly starting parallel charging of batteries corresponding to minimum battery information in an embodiment of the present application.
Fig. 6 is a flowchart of a method for commonly starting up the batteries corresponding to the maximum battery information for parallel use according to an embodiment of the present application.
Fig. 7 is a flowchart of a method of battery detection in an embodiment of the application.
Fig. 8 is a schematic block diagram of a method for controlling a battery of an electric vehicle according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings 1 to 8 and 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 application.
Embodiments of the invention are described in further detail below with reference to the drawings.
Referring to fig. 1, an embodiment of the present invention provides a method for controlling a battery of an electric vehicle, where the main flow of the method for controlling a battery of an electric vehicle is described as follows:
step 100: and acquiring battery power information and battery quantity information.
The battery power information is the attribute of the battery, namely all the states of the battery, and the lithium batteries with different models correspond to different attributes, such as working voltage, working current, rated current voltage and the like. The battery number information is the number of batteries, and the batteries can be single lithium batteries or a lithium battery pack. The battery power information CAN be obtained by any equipment for measuring voltage and current, and the battery quantity information is obtained by inputting CAN signals into a central control system of the lithium battery pack, and the central control system determines whether the battery pack is a single battery pack or a plurality of battery packs according to the received CAN signals.
Step 101: and if the number value corresponding to the battery number information is 1, charging or discharging the battery corresponding to the battery power information.
When the number value corresponding to the battery number information is 1, it indicates that only one battery pack is working, and the problem that the battery with high electric quantity can charge the battery with low electric quantity to generate current impact, so that the battery is easy to damage and even dangerous is avoided, so that the battery can be charged and discharged normally.
Step 102: and if the number value corresponding to the battery number information is 2, acquiring the current working state information.
The current operating state information is a state of a process of whether the battery is being charged or discharged. The acquisition may be performed in the form of variations in voltage and current. If the number value corresponding to the battery number information is 2, it is indicated that two battery packs are working, and the problem that the battery with high electric quantity is required to charge the battery with low electric quantity to generate current impact, so that the battery is easy to damage and even dangerous is caused is solved.
Step 103: and judging whether the working state corresponding to the current working state information is a charging state or not.
The purpose of the determination is to determine whether it is a power loss process or a power acquisition process, and thus the manner in which the battery is controlled. The manner of judgment is that the current and the voltage change, if the current or the voltage increases, the charging is indicated, and if the current or the voltage decreases, the discharging is indicated.
Step 1031: if the battery is in a charged state, a battery with low voltage is selected for charging until the same voltage as the battery with high voltage is reached.
If the battery is in a charged state, the voltage of the battery with low voltage needs to be raised as soon as possible to reach the voltage of the battery with high voltage, and the voltage between the battery and the battery is ensured to be the same.
Step 1032: if the battery is not in a charging state, the battery with high voltage is selected and used until the same voltage as the battery with low voltage is reached.
If it is not in a charged state, it is currently in a discharged state or in a state of non-use, and when it needs to be used, it is necessary to reduce the voltage of the high-voltage battery to be the same as or similar to the voltage of the low-voltage battery, while ensuring the same voltage therebetween.
Step 104: batteries corresponding to the electric energy information of the two groups of batteries are simultaneously started to be charged in parallel.
When the voltages of the two groups of batteries are the same, the two groups of batteries can be connected in parallel for charging, and the batteries are not easy to be damaged due to current impact caused by poor electric quantity in the charging process of the two groups of batteries, so that the safety of the two batteries in common use is improved.
Step 105: batteries corresponding to the electric energy information of the two groups of batteries are simultaneously started to be used in parallel.
When the voltages of the two groups of batteries are the same, the two groups of batteries can be connected in parallel to discharge, and the batteries are not easy to be damaged due to current impact in the discharging process, so that the safety of the double batteries in common use is improved.
Referring to fig. 2, the method for controlling the battery if the number value corresponding to the battery number information is greater than 2 includes:
step 200: and sequencing the battery electric energy information of the batteries according to the voltage, defining the battery with the minimum voltage as the minimum battery information, and defining the battery with the highest voltage as the maximum battery information.
The minimum battery information is information of the battery pack with the minimum voltage, and comprises the voltage and the current of the battery pack with the minimum voltage, and the maximum battery information is information of the battery pack with the maximum voltage, and comprises the voltage and the current of the battery pack with the maximum voltage. The sorting mode is that the voltage is from big to small or from small to big, and the purpose of sorting is to facilitate the searching and controlling of the central control system.
Step 201: and judging whether the working state corresponding to the current working state information is a charging state or not.
The judging manner is identical to that of step 103, and will not be described in detail herein.
Step 2011: and if the battery is in the charging state, charging the battery corresponding to the minimum battery information and sequencing the batteries in real time.
If the battery is in a charged state, the voltage of the battery with small voltage needs to be raised, the voltage of the minimum battery information needs to be raised first, then the sequence is detected at any time, and the charged battery can be adjusted at any time once the battery corresponding to the minimum battery information changes, so that the voltage of the battery is raised together.
Step 2012: and if the battery is not in the charging state, using the battery corresponding to the maximum battery information and sequencing the batteries in real time.
If the battery is not in a charged state, the battery is in a discharged or unused state, the voltage of the battery with high voltage needs to be reduced, then the sequence is detected at any time, and once the battery corresponding to the maximum battery information changes, the discharged battery can be adjusted at any time so as to be reduced together.
Step 202: and judging whether the number of the batteries corresponding to the minimum battery information is 1.
The purpose of the judgment is to determine whether the number of the batteries in the minimum battery information is 1, and the batteries can be approximately regarded as the minimum battery information when the voltages are similar, so that whether the batteries with the same voltage can be charged simultaneously is obtained, and the charging efficiency is improved.
Step 2021: if the number of batteries corresponding to the minimum battery information is 1, the battery corresponding to the minimum battery information is kept in a charged state.
If the number of batteries corresponding to the minimum battery information is 1, the current minimum voltage is only one, and parallel charging is not needed, so that the batteries corresponding to the minimum battery information are maintained to charge until the same voltage as the batteries with one higher voltage.
Step 2022: if the number of the batteries corresponding to the minimum battery information is not 1, the batteries corresponding to the minimum battery information are started to be charged in parallel.
If the number of the batteries corresponding to the minimum battery information is not 1, the fact that at least two batteries with the same or similar voltages are at the minimum value at the moment is indicated, parallel charging can be simultaneously carried out, the batteries are not easy to be damaged due to current impact caused by electric quantity difference, and safety of the batteries in common use is improved.
Step 203: and judging whether the number of the batteries corresponding to the maximum battery information is 1.
The principles herein are similar to those of step 202 and will not be described in detail herein.
Step 2031: if the number of batteries corresponding to the maximum battery information is 1, the battery corresponding to the maximum battery information is kept in a use state.
If the number of the batteries corresponding to the maximum battery information is 1, the current maximum voltage is only one, and the batteries corresponding to the maximum battery information are maintained to be used until the same voltage as the battery with one lower voltage is obtained.
Step 2032: if the number of the batteries corresponding to the maximum battery information is not 1, the batteries corresponding to the maximum battery information are started to be used in parallel.
If the number of the batteries corresponding to the maximum battery information is not 1, the fact that at least two batteries with the same or similar voltages are at the maximum value at the moment is indicated, parallel connection can be simultaneously carried out, the batteries are not easy to be damaged due to current impact caused by electric quantity difference, and safety of the batteries in common use is improved.
Referring to fig. 3, the method of selecting a battery with a high voltage for use until the same voltage as the battery with a low voltage is reached includes:
Step 300: and acquiring first tire rotation speed information of the battery with high voltage in the using process.
The first tire rotation speed information is rotation speed information of the tire when the battery having a high voltage is in use and the battery having a low voltage is not in use, and the rotation speed information may be obtained by any sensor that can sense the number of turns of the tire, such as a wheel speed sensor. The wheel speed sensor is a sensor for measuring the rotational speed of a wheel of an automobile. The common wheel speed sensors mainly include: magnetoelectric wheel speed sensor and Hall wheel speed sensor.
Step 301: and carrying out matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the first tire rotation speed information to determine an electric energy value corresponding to the first tire rotation speed information, and positioning the electric energy value as first converted electric energy information.
The first converted electric energy information is an electric energy value when the first tire rotation speed information is converted into electric energy, a mapping relation between the tire rotation speed corresponding to the first tire rotation speed information and the electric energy power is stored in an electric energy conversion database, the database is obtained by long-term test of workers in the field, and when the first tire rotation speed information is sensed, the central control system automatically searches the corresponding electric energy power from the database.
Step 302: and carrying out matching analysis according to the charging current value stored in the preset charging current database and the battery power information to determine the charging current corresponding to the battery power information with low voltage, and defining the charging current as standard charging current information.
The standard charging current information is a current value of battery electric energy information with low voltage in a charging process, a mapping relation between the battery electric energy information and the current value is stored in a charging current database, the database is obtained by long-term test of workers in the field, and when the voltage corresponding to the battery electric energy information is sensed, the system automatically searches the corresponding charging current from the database. The purpose of searching is to determine the proper current in the charging process, so that the lithium battery is not easy to be burst due to overlarge current in the charging process.
Step 303: and converting the first converted electric energy information into current corresponding to the standard charging current information through the converter to charge the battery with low voltage.
The first converted electric energy information is charged through the current of the battery with low voltage, so that the voltage of the battery with low voltage can be reduced by the high-voltage battery and the voltage of the battery with low voltage are mutually close to each other to realize parallel connection in advance, and the overall voltage is improved.
Referring to fig. 4, a method for simultaneously starting batteries corresponding to two sets of battery power information for parallel use includes:
step 400: and acquiring the second tire rotation speed information in the parallel use process of the batteries corresponding to the two groups of battery electric energy information.
The second tire rotation speed information is the tire rotation speed information when the batteries corresponding to the two sets of battery power information are simultaneously turned on for parallel use, and the obtaining manner is described in step 300, which is not described herein.
Step 401: and carrying out matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the first tire rotation speed information to determine an electric energy value corresponding to the first tire rotation speed information, and positioning the electric energy value as converted electric energy information.
The second converted electric energy information is an electric energy value when the second tire rotation speed information is converted into electric energy, and a mapping relation between the tire rotation speed corresponding to the second tire rotation speed information and the electric energy power is stored in an electric energy conversion database, wherein the database is obtained by long-term test of workers in the field, and when the second tire rotation speed information is sensed, the central control system automatically searches the corresponding electric energy power from the database.
Step 402: and storing the electric energy corresponding to the second converted electric energy information for other electric equipment.
Because two or more batteries are all at the same voltage, any one battery does not need to be charged, otherwise, one voltage is easy to rise, negative effects are generated, and the electric energy can be stored for other equipment to use after eating, for example, a central control is started, or an instrument panel is started, etc.
Referring to fig. 5, the method for commonly starting parallel charging of the batteries corresponding to the minimum battery information includes:
step 500: and acquiring charging frequency information corresponding to each battery.
The charging frequency information is the effective charging frequency of each battery in the charging process, and the obtained charging frequency information is any counting device, such as a counter. The purpose of the acquisition is to determine the number of charging and discharging.
Step 501: and carrying out matching analysis according to the battery capacity and the charging frequency information stored in the preset battery capacity database to determine the battery capacity corresponding to the charging frequency information, and defining the battery capacity as battery capacity information.
The battery capacity information is a battery capacity corresponding to the charge number information. Since the battery has a certain service life in charge and discharge, the capacity is easily reduced in the charge and discharge process, and thus the battery capacity needs to be determined. The battery capacity database comprises the mapping relation between the charging frequency information and the battery capacity, and is a result obtained by long-term test of workers in the field. When the charging frequency information is obtained, the central control system automatically retrieves the corresponding battery capacity from the database.
Step 502: and acquiring the charge state information of the current battery.
The charge state information is a phase of charging of the battery. The lithium battery charging process is divided into four stages: trickle charge, constant current charge, constant voltage charge, and charge termination. Stage 1: trickle charge-trickle charge is used to pre-charge (restorative charge) a fully discharged battery cell first. Stage 2: constant current charging-when the battery voltage rises above the trickle charge threshold, the charging current is increased to perform constant current charging. Stage 3: constant voltage charging-when the battery voltage rises to 4.2V, constant current charging ends, starting the constant voltage charging phase. For optimum performance, the regulation tolerance should be better than +1%.
Stage 4: the charging is terminated. The acquisition mode can be to detect the voltage and the current of the battery in a smaller time period, and if the voltage is unchanged, the constant voltage charging is stopped or the charging is stopped; if the current is unchanged, the trickle charge or constant current charge state is indicated. When the battery is full, the state of charge information is determined by judgment of the voltage and current.
Step 503: if the state corresponding to the charging state information is a trickle charging state or a constant current charging state, performing matching analysis according to the constant current voltage stored in the preset charging voltage database and the battery capacity information to determine the constant current voltage corresponding to the battery capacity information, and defining the constant current voltage as constant current voltage information.
If the state corresponding to the charging state information is the trickle charging state or the constant current charging state, the current is unchanged when the current battery is fully charged or is close to the current. At this time, the voltage at the time of rising to the full battery capacity is determined based on the battery capacity information. The charging voltage database stores the mapping relation between battery capacity information and constant current voltage, which is a result obtained by long-term test of workers in the field. When the battery capacity information is acquired, the central control system automatically invokes the corresponding constant current voltage from the database.
Step 504: and judging whether the voltage corresponding to the battery electric energy information is equal to the voltage corresponding to the constant-current voltage information.
The purpose of the determination is to determine whether the battery being charged is in a full state.
Step 5041: and if the voltage corresponding to the battery electric energy information is equal to the voltage corresponding to the constant-current voltage information, disconnecting and charging the battery corresponding to the battery electric energy information.
If the voltage corresponding to the battery power information is equal to the voltage corresponding to the constant-current voltage information, the current battery is fully charged, and if the battery is continuously charged, the battery is possibly broken down and damaged, so that the current battery needs to be disconnected and not charged.
Step 5042: if the voltage corresponding to the battery electric energy information is smaller than the voltage corresponding to the constant current voltage information, the charging is continued.
If the voltage corresponding to the battery electric energy information is smaller than the voltage corresponding to the constant-current voltage information, the current battery is not fully charged, and charging can be continued.
Step 505: if the state corresponding to the charging state information is a constant voltage charging state or a charging termination state, performing matching analysis according to the constant voltage current stored in the preset charging current database and the battery capacity information to determine the constant voltage current corresponding to the battery capacity information, and defining the constant voltage current as constant voltage current information.
If the state corresponding to the charge state information is a constant voltage charge state or a charge termination state, the voltage is unchanged when the current battery is fully charged or when the current battery is close to the current battery. At this time, the magnitude of the current when the battery reaches the full capacity is determined based on the battery capacity information. The charging voltage database stores the mapping relation between battery capacity information and constant voltage current, which is the result obtained by long-term test of workers in the field. When the battery capacity information is acquired, the central control system automatically retrieves the corresponding constant voltage current from the database.
Step 506: and judging whether the current corresponding to the battery power information is equal to the current corresponding to the constant voltage current information.
The purpose of the determination is to determine whether the battery being charged is in a full state.
Step 5061: if the current corresponding to the battery electric energy information is larger than the current corresponding to the constant voltage current information, the charging is continued.
If the current corresponding to the battery power information is greater than the current corresponding to the constant voltage current information, the current battery is fully charged, and if the battery is continuously charged, the battery is possibly broken down and damaged, so that the current battery needs to be disconnected and not charged.
Step 5062: and if the current corresponding to the battery electric energy information is equal to the current corresponding to the constant voltage current information, disconnecting and charging the battery corresponding to the battery electric energy information.
If the voltage corresponding to the battery electric energy information is smaller than the voltage corresponding to the constant-current voltage information, the current battery is not fully charged, and charging can be continued.
Referring to fig. 6, if the method for commonly opening the batteries corresponding to the maximum battery information for parallel use includes:
step 600: and acquiring current discharge duration information.
The current discharging time length information is the time length of the battery in use. I.e., the length of time that begins counting when the battery enters a state of use from a state of charge or an unused state. The manner of acquisition may be any timing device, such as a stopwatch, etc. When the battery enters a use state from a charging state or an unused state, the timing device starts to work and time.
Step 601: and carrying out matching analysis according to the discharge time length stored in the preset discharge current database and the battery capacity information to determine the discharge time length corresponding to the battery capacity information, and defining the discharge time length as reference discharge time length information.
The reference discharging duration information is the duration when the electric energy corresponding to the current battery capacity information is completely discharged. The discharging current database stores the mapping relation between the battery capacity information and the discharging time length, and the mapping relation is obtained by long-term experiments by a person skilled in the art. When the battery capacitance is obtained, the central control system automatically matches the corresponding discharging duration from the database.
Step 602: and comparing the current discharge time length information with the reference discharge time length information.
The comparison mode of the two is numerical comparison, and the purpose of the comparison is to determine whether the electric quantity of one battery is discharged.
Step 6021: and if the time length corresponding to the current discharge time length information is smaller than the reference discharge time length information, continuing to discharge.
If the time length corresponding to the current discharge time length information is smaller than the reference discharge time length information, the fact that the electric energy in the current battery is not discharged is indicated, and the fact that the discharge can be continued is indicated.
Step 6022: if the time length corresponding to the current discharge time length information is equal to the reference discharge time length information, disconnecting the battery corresponding to the current discharge time length information and starting the preset standby battery for parallel use.
The spare battery is a battery previously placed on the electric vehicle, which is hardly used, is used in a temporary state, and then can be charged when the remaining batteries are charged and the voltage is identical to that of the spare battery. If the duration corresponding to the current discharge duration information is equal to the reference discharge duration information, the fact that the electric energy of the current battery is discharged at the moment is indicated, the battery can be disconnected, and the current of other batteries is prevented from flowing into the battery. Because the battery is disconnected to cause voltage reduction, in order to maintain the current voltage and current, the standby battery is used, so that the working process of the electric vehicle is stable.
Referring to fig. 7, the method of battery detection includes:
step 700: and acquiring constant voltage information of the battery in the working or charging working.
The battery constant voltage information is voltage information of the battery in the constant voltage working process. The voltages of the batteries with different types in the corresponding constant voltage working process are different, so that the judgment can be carried out from the voltage in the constant voltage state. Here, current information in a constant current state may also be used.
Step 701: the battery constant voltage information is compared with the preset standard constant voltage information.
The comparison mode is numerical comparison, namely, the values corresponding to the two voltages are compared. The purpose of the comparison is to determine whether the batteries are of the same model.
Step 7011: and if the constant voltage information of the battery is consistent with the preset standard constant voltage information, continuing to work or charging.
If the constant voltage information of the battery is consistent with the preset standard constant voltage information, the battery model is consistent, and the normal operation can be realized without replacing the battery.
Step 7012: if the battery constant voltage information is inconsistent with the preset standard constant voltage information, disconnecting the battery corresponding to the battery constant voltage information, and starting the preset standby battery to charge in parallel or work in parallel and sending out an alarm.
If the constant voltage information of the battery is inconsistent with the preset standard constant voltage information, the battery at the moment is not an adaptive battery and is different from other batteries, and the battery needs to be replaced, but if the vehicle is not located at a place where the battery can be replaced at the moment, the standby battery can be temporarily used so that the electric vehicle can work and charge normally, so that the electric vehicle can be moved to the place where the battery is replaced, but a user needs to be reminded of the need of replacement, and the corresponding battery cannot be used for a long time. The alarm may be any type of alarm, such as a buzzer.
Based on the same inventive concept, an embodiment of the present invention provides an electric vehicle battery control system, including:
referring to fig. 8, an electric vehicle battery control system includes:
an information acquisition module 803 for acquiring battery power information and battery number information;
the processing module 801 is connected with the information acquisition module 803 and the judging module 802 and is used for storing and processing information;
the selecting module 804 is connected with the processing module 801 and is used for selecting a battery with high voltage for use;
the detection module 805 is connected with the processing module 801 and is used for detecting constant voltage information of the battery and giving an alarm;
a judging module 802, configured to judge whether the working state corresponding to the current working state information is a charging state;
if the judging module 802 judges that the number value corresponding to the battery number information is 1, the processing module 801 uses the battery corresponding to the battery power information to charge or discharge;
if the judging module 802 judges that the number value corresponding to the battery number information is 2, the information obtaining module 803 obtains the current working state information;
if the judging module 802 judges that the current working state information is a charging state, the processing module 801 selects a battery with low voltage to charge until the same voltage as the battery with high voltage is reached;
The processing module 801 controls batteries corresponding to the two groups of battery power information to simultaneously start parallel charging;
if the judging module 802 judges that the current working state information is not the charging state, the processing module 801 selects the battery with high voltage for use until the same voltage as the battery with low voltage is reached;
the processing module 801 controls the batteries corresponding to the two sets of battery power information to be simultaneously turned on for parallel use.
Embodiments of the present invention provide a computer-readable storage medium storing a computer program that can be loaded by a processor and execute an electric vehicle battery control method.
The computer storage medium includes, for example: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Based on the same inventive concept, the embodiment of the invention provides an intelligent terminal, which comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and execute the battery control method of the electric vehicle.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.
The foregoing description of the preferred embodiments of the application is not intended to limit the scope of the application in any way, including the abstract and drawings, in which case any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

Claims (9)

1. A battery control method for an electric vehicle, comprising:
acquiring battery electric energy information and battery quantity information;
if the number value corresponding to the battery number information is 1, charging or discharging the battery corresponding to the battery electric energy information;
if the number value corresponding to the battery number information is 2, acquiring the current working state information;
judging whether the working state corresponding to the current working state information is a charging state or not;
if the battery is in a charging state, selecting a battery with low voltage for charging until the same voltage as the battery with high voltage is reached;
batteries corresponding to the electric energy information of the two groups of batteries are simultaneously started to be charged in parallel;
if the battery is not in a charging state, selecting a battery with high voltage for use until the same voltage as the battery with low voltage is reached;
Batteries corresponding to the electric energy information of the two groups of batteries are simultaneously started for parallel connection;
the method also comprises the step of selecting the battery with high voltage to use until reaching the same voltage as the battery with low voltage, and comprises the following steps:
acquiring first tire rotation speed information of a battery with high voltage in the using process;
performing matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the first tire rotation speed information to determine an electric energy value corresponding to the first tire rotation speed information, and positioning the electric energy value as first converted electric energy information;
according to the charging current value stored in the preset charging current database and the battery power information, carrying out matching analysis to determine the charging current corresponding to the battery power information with low voltage, and defining the charging current as standard charging current information;
and converting the first converted electric energy information into current corresponding to the standard charging current information through the converter to charge the battery with low voltage.
2. The method for controlling a battery of an electric vehicle according to claim 1, wherein the method for controlling the battery if the number value corresponding to the number information of the battery is greater than 2 comprises:
Sequencing the battery electric energy information of the batteries according to the voltage and defining the battery with the minimum voltage as the minimum battery information, and the battery with the highest voltage as the maximum battery information;
judging whether the working state corresponding to the current working state information is a charging state or not;
if the battery is in a charging state, charging the battery corresponding to the minimum battery information and sequencing the batteries in real time;
judging whether the number of batteries corresponding to the minimum battery information is 1;
if the battery information is 1, the battery corresponding to the minimum battery information is kept in a charging state;
if the battery information is not 1, the batteries corresponding to the minimum battery information are started in parallel for charging;
if the battery is not in the charging state, the battery corresponding to the maximum battery information is used and sequenced in real time;
judging whether the number of batteries corresponding to the maximum battery information is 1;
if the battery information is 1, the battery corresponding to the maximum battery information is kept in a use state;
if the battery information is not 1, the batteries corresponding to the maximum battery information are started to be used in parallel.
3. The method for controlling batteries of an electric vehicle according to claim 1, wherein the method for simultaneously starting the batteries corresponding to the two sets of battery power information for parallel use comprises:
Acquiring second tire rotation speed information of batteries corresponding to the two groups of battery electric energy information in the parallel use process;
performing matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the second tire rotation speed information to determine an electric energy value corresponding to the second tire rotation speed information, and positioning the electric energy value as second converted electric energy information;
and storing the electric energy corresponding to the second converted electric energy information for other electric equipment.
4. The method for controlling a battery of an electric vehicle according to claim 2, wherein the method for commonly starting parallel charging of the battery corresponding to the minimum battery information comprises:
acquiring charging frequency information corresponding to each battery;
performing matching analysis according to the battery capacity and the charging frequency information stored in a preset battery capacity database to determine the battery capacity corresponding to the charging frequency information, and defining the battery capacity as battery capacity information;
acquiring the charge state information of the current battery;
if the state corresponding to the charging state information is a trickle charging state or a constant current charging state, performing matching analysis according to the constant current voltage stored in the preset charging voltage database and the battery capacity information to determine the constant current voltage corresponding to the battery capacity information, and defining the constant current voltage as constant current voltage information;
Judging whether the voltage corresponding to the battery electric energy information is equal to the voltage corresponding to the constant-current voltage information or not;
if the voltage corresponding to the battery electric energy information is equal to the voltage corresponding to the constant-current voltage information, disconnecting and charging the battery corresponding to the battery electric energy information;
if the voltage corresponding to the battery electric energy information is smaller than the voltage corresponding to the constant-current voltage information, continuing to charge;
if the state corresponding to the charging state information is a constant voltage charging state or a charging termination state, performing matching analysis according to the constant voltage current stored in the preset charging current database and the battery capacity information to determine the constant voltage current corresponding to the battery capacity information, and defining the constant voltage current as constant voltage current information;
judging whether the current corresponding to the battery electric energy information is equal to the current corresponding to the constant voltage current information;
if the current corresponding to the battery electric energy information is larger than the current corresponding to the constant voltage current information, continuing to charge;
and if the current corresponding to the battery electric energy information is equal to the current corresponding to the constant voltage current information, disconnecting and charging the battery corresponding to the battery electric energy information.
5. The method for controlling electric vehicle battery according to claim 4, wherein if the batteries corresponding to the maximum battery information are turned on in parallel, the method comprises:
Acquiring current discharge duration information;
performing matching analysis according to the discharge time length stored in the preset discharge current database and the battery capacity information to determine the discharge time length corresponding to the battery capacity information, and defining the discharge time length as reference discharge time length information;
comparing the current discharge time length information with the reference discharge time length information;
if the time length corresponding to the current discharge time length information is smaller than the reference discharge time length information, continuing to discharge;
if the time length corresponding to the current discharge time length information is equal to the reference discharge time length information, disconnecting the battery corresponding to the current discharge time length information and starting the preset standby battery for parallel use.
6. The method for controlling a battery of an electric vehicle according to claim 1, further comprising a method for battery detection, the method comprising:
acquiring constant voltage information of a battery in working or charging working;
comparing the battery constant voltage information with preset standard constant voltage information;
if the constant voltage information of the battery is consistent with the preset standard constant voltage information, continuing to work or charging;
if the battery constant voltage information is inconsistent with the preset standard constant voltage information, disconnecting the battery corresponding to the battery constant voltage information, and starting the preset standby battery to charge in parallel or work in parallel and sending out an alarm.
7. An electric vehicle battery control system, comprising:
the information acquisition module is used for acquiring battery electric energy information and battery quantity information;
the processing module is connected with the information acquisition module and the judging module and is used for storing and processing information;
the judging module is used for judging whether the working state corresponding to the current working state information is a charging state or not;
if the judging module judges that the number value corresponding to the battery number information is 1, the processing module uses the battery corresponding to the battery electric energy information to charge or discharge;
if the judging module judges that the number value corresponding to the battery number information is 2, the information acquisition module acquires the current working state information;
if the judging module judges that the current working state information is a charging state, the processing module selects a battery with low voltage to charge until the same voltage as the battery with high voltage is reached;
the processing module controls batteries corresponding to the two groups of battery electric energy information to simultaneously start parallel charging;
if the judging module judges that the current working state information is not the charging state, the processing module selects the battery with high voltage to use until the same voltage as the battery with low voltage is reached;
The processing module controls batteries corresponding to the two groups of battery electric energy information to be simultaneously started for parallel use;
the method for selecting the battery with high voltage to use by the processing module until the same voltage of the battery with low voltage is reached is further included, and the method comprises the following steps:
the information acquisition module acquires first tire rotation speed information of the battery with high voltage in the using process;
the processing module performs matching analysis according to the electric energy conversion value stored in the preset electric energy conversion database and the first tire rotation speed information to determine an electric energy value corresponding to the first tire rotation speed information, and positions the electric energy value as first converted electric energy information;
the processing module performs matching analysis according to the stored charging current value and battery electric energy information in a preset charging current database to determine the charging current corresponding to the battery electric energy information with low voltage, and defines the charging current as standard charging current information;
the processing module converts the first converted electric energy information into current corresponding to the standard charging current information through the converter to charge the battery with low voltage.
8. An intelligent terminal comprising a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute the electric vehicle battery control method according to any one of claims 1 to 6.
9. A computer readable storage medium storing a computer program loadable by a processor and executable by the battery control of any one of claims 1 to 6.
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