CN113410891A - Lithium battery pack charging and discharging method and system, storage medium and intelligent terminal - Google Patents
Lithium battery pack charging and discharging method and system, storage medium and intelligent terminal Download PDFInfo
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- CN113410891A CN113410891A CN202110753571.2A CN202110753571A CN113410891A CN 113410891 A CN113410891 A CN 113410891A CN 202110753571 A CN202110753571 A CN 202110753571A CN 113410891 A CN113410891 A CN 113410891A
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- 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
- H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application relates to a lithium battery pack charging and discharging method, a lithium battery pack charging and discharging system, a storage medium and an intelligent terminal, which relate to the field of lithium battery packs and comprise the steps of obtaining current voltage detection information of a plurality of current lithium battery packs and current charging state information of the current lithium battery packs; searching a lithium battery charging starting pack from a preset charging rule database according to the current charging state information and the current voltage detection information; charging according to the current voltage detection information of the starting lithium battery pack, updating the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information; until the current voltage detection information is consistent with the preset highest voltage information. This application has the effect that improves the efficiency that a plurality of lithium cell package were charged simultaneously.
Description
Technical Field
The application relates to the field of lithium battery packs, in particular to a lithium battery pack charging and discharging method, a lithium battery pack charging and discharging system, a storage medium and an intelligent terminal.
Background
The lithium battery pack is an energy source which can be repeatedly charged and discharged for use.
In the related art, for example, chinese patent publication No. CN110931904A, a method for controlling charging and discharging of a lithium battery pack includes the following steps: collecting voltage and current of a lithium battery pack, and obtaining theoretical maximum charging power of the lithium battery pack through a PID (proportion integration differentiation) regulation algorithm according to the voltage and the current; collecting voltage and current of a lithium battery pack, and obtaining theoretical maximum discharge power of the lithium battery pack through a PID (proportion integration differentiation) regulation algorithm according to the voltage and the current; obtaining reference maximum discharge power according to the maximum discharge current and the minimum discharge voltage of the lithium battery pack; obtaining continuous discharge power and instantaneous discharge power according to the continuously collected voltage and current; adjusting through a PID (proportion integration differentiation) adjusting algorithm according to the continuous discharge power and the instantaneous discharge power to obtain the adjusted maximum discharge power; and taking the minimum power of the three as the maximum discharge power of the lithium battery pack.
In view of the above-mentioned related art, the inventors believe that when such a charging method is adopted, constant current charging is performed first, and trickle charging is performed thereafter. After a lithium battery pack is full of, the next lithium battery pack is replaced to charge, so that the whole charging time period of a plurality of lithium battery packs is long, and the improved space is provided.
Disclosure of Invention
In order to improve the efficiency of charging a plurality of lithium battery packs simultaneously, the application provides a lithium battery pack charging and discharging method, a lithium battery pack charging and discharging system, a storage medium and an intelligent terminal.
In a first aspect, the present application provides a method for charging and discharging a lithium battery pack, which adopts the following technical scheme:
a lithium battery pack charging and discharging method comprises the following steps:
acquiring current voltage detection information of a plurality of current lithium battery packs and current charging state information of the current lithium battery packs;
searching a lithium battery charging starting pack from a preset charging rule database according to the current charging state information and the current voltage detection information;
charging according to the current voltage detection information of the starting lithium battery pack, updating the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information;
and indicating until the current voltage detection information is consistent with the preset highest voltage information.
By adopting the technical scheme, the charging time and the electric quantity of the lithium battery pack in the constant-current and trickle states are different, so that the voltages of the multiple lithium battery packs needing to be charged are detected, the conditions of the multiple lithium battery packs are known, the charging state is also known, and the current lithium battery pack is judged to be in the charging state or the discharging state. And then judging the lithium battery pack to be charged by the charging rule database, so as to charge the lithium battery pack to be charged, simultaneously knowing the voltage condition, charging the other lithium battery pack and the current lithium battery pack when the voltage reaches the voltage value of the next lithium battery pack, repeatedly judging, preferentially filling the lithium battery packs in a constant current state, and then performing trickle charging, thereby improving the charging efficiency.
Optionally, the method for acquiring the charging and discharging rule database includes:
judging whether the current voltage detection information is greater than or equal to the preset trickle charge voltage information or not;
if the current battery pack is smaller than the preset value, defining the battery pack as a first-stage battery pack group;
if the battery pack is larger than or equal to the first stage battery pack, defining the battery pack as a second stage battery pack group;
judging whether the current charge-discharge state information of the battery pack group at the first stage is in a charge state;
and if the current charging and discharging state information is the charging state, sequencing the current voltage detection information in the current lithium battery pack to screen out the minimum value of the current voltage detection information, and defining the current voltage detection information as the starting lithium battery pack.
By adopting the technical scheme, the current voltage detection information is judged, so that whether the current voltage detection information is larger than or equal to the trickle charge voltage information is judged, whether the current voltage detection information is in the trickle charge state is judged, the first-stage battery pack group and the second-stage battery pack group are carried out on the lithium battery pack to judge, the batteries in the first-stage battery pack group are charged preferentially, and the lithium battery pack is charged after being charged, so that the overall charging efficiency is improved.
Optionally, when the current voltage detection information of the lithium battery pack to be charged is consistent with the current voltage detection information of another lithium battery pack, the charging method of another lithium battery pack includes:
judging whether the current voltage detection information of the currently charged lithium battery pack falls into the first-stage battery pack group or the second-stage battery pack group;
if the current voltage detection information of the first-stage battery pack group is consistent with the current voltage detection information of the first-stage battery pack group, synchronously charging another lithium battery pack;
if the battery pack falls into the second-stage battery pack group and no lithium battery pack exists in the first-stage battery pack group, synchronously charging another lithium battery pack which is in the second-stage battery pack group and is consistent with the current voltage detection information;
if the battery pack falls into the second-stage battery pack group and a lithium battery pack exists in the first-stage battery pack group, prompting is carried out.
Through adopting above-mentioned technical scheme, know through the condition of falling into to first stage battery package group or second stage battery package group to arrange the lithium cell package that charges, improve the efficiency of whole charging.
Optionally, the method for discharging the multiple lithium battery packs includes:
acquiring current discharging state information of a plurality of current lithium battery packs;
arranging the current voltage detection information in a reverse order according to the current discharge state information, and screening out the lithium battery pack with the highest voltage to define the lithium battery pack as a starting and discharging lithium battery pack;
discharging according to the current voltage detection information of the starting and discharging lithium battery pack, updating the current voltage detection information of the starting and discharging lithium battery pack in real time until the current voltage detection information of the starting and discharging lithium battery pack is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information;
until the current voltage detection information is set to the preset discharge protection voltage information.
Through adopting above-mentioned technical scheme, through knowing the condition of discharging to judge whether the lithium cell package is in the state of power supply, when being in under the power supply state, discharge the battery package, and discharge the battery package of the same voltage together, thereby improve holistic performance in utilization.
Optionally, when the discharge voltages of the multiple lithium battery packs are different, the method for discharging the multiple lithium battery packs includes:
acquiring current detection information of a current lithium battery pack;
discharging according to the current voltage detection information of the starting and discharging lithium battery pack, generating a change curve of the current detection information in the discharging time, and calculating the slope;
judging whether the slope of the change curve is greater than a preset reference slope or not;
if the current voltage of the lithium battery pack is less than the preset voltage, continuing to discharge until the current voltage is consistent with the current voltage detection information of the other lithium battery pack so as to control the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information;
if the current voltage is larger than or equal to the preset voltage, calculating the voltage difference between the current discharging lithium battery pack and other lithium battery packs, and arranging the current discharging lithium battery pack and other lithium battery packs in a reverse order;
screening out the lithium battery pack with the minimum voltage difference, connecting the lithium battery pack with the current discharging lithium battery pack in parallel for discharging, and judging whether the slope of the current change curve is greater than the preset reference slope again;
if the current voltage of the lithium battery pack is less than the preset voltage, continuing discharging until the current voltage is consistent with the current voltage detection information of the other lithium battery pack so as to control the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information;
if the voltage difference is larger than or equal to the preset reference slope, controlling the lithium battery pack with the minimum voltage difference in the lithium battery packs which are not connected in parallel to be connected in parallel with the currently-connected lithium battery pack for discharging, and repeatedly judging whether the slope of the current change curve is larger than the preset reference slope or not until the slope is smaller than the reference slope;
and if all the lithium battery packs are still larger than or equal to the reference slope after being connected in parallel, stopping discharging and prompting.
By adopting the technical scheme, when the voltages of the lithium battery packs are different and the slope of the change curve is larger than the reference slope, the lithium battery packs with different voltages are subjected to parallel synchronous discharge, so that the discharge burden of a single lithium battery pack is reduced, and the practicability is high.
Optionally, the discharge state of the lithium battery pack is determined, and the determination method includes:
acquiring current discharge curve information of a lithium battery pack in a current discharge state and model detection information of the current discharge lithium battery pack;
searching reference discharge information from a preset model database according to the model detection information;
judging whether the current discharge curve information is consistent with the reference discharge information;
if the voltage is consistent with the preset voltage, continuing discharging;
and if the current lithium battery pack is inconsistent with the preset lithium battery pack, disconnecting the power supply loop of the current lithium battery pack for prompt.
By adopting the technical scheme, the discharging curve information and the model detection information are detected, so that the discharging condition is known, and once the discharging curve information is inconsistent with the reference discharging information, the problem of the lithium battery pack is indicated, and therefore prompt is given.
Optionally, the lithium battery pack detects the connection state before charging, and the detection method includes:
acquiring current insertion state information of a connector of a current lithium battery pack;
judging whether the current insertion state information is consistent with the preset insertion reference information or not;
if the voltage values are consistent, closing a preset power supply loop to charge and discharge the lithium battery pack;
if the current lithium battery pack is inconsistent with the preset lithium battery pack, judging whether a connection port of the current lithium battery pack is conducted;
and if the current is conducted, prompting.
Through adopting above-mentioned technical scheme, through the inserted state to the connector of lithium cell package to judge whether the lithium cell package inserts the intercommunication, and know the condition of switching on of connector, reduce the foreign matter and switch on and the problem of the lithium cell package short circuit that leads to.
In a second aspect, the present application provides a lithium battery pack charging and discharging system, which adopts the following technical scheme:
a lithium battery pack charge-discharge system comprising:
the acquisition module is used for acquiring current voltage detection information of a plurality of current lithium battery packs and current charging state information of the current lithium battery packs;
the searching module searches a lithium battery charging start pack from a preset charging rule database according to the current charging state information and the current voltage detection information;
the processing module is connected with the acquisition module and the search module and is used for storing and processing information;
the processing module charges the lithium battery pack according to the current voltage detection information of the starting lithium battery pack, updates the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information of the starting lithium battery pack is consistent with the current voltage detection information of another lithium battery pack, and controls the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information; until the current voltage detection information is consistent with the preset highest voltage information.
By adopting the technical scheme, the charging time and the electric quantity of the lithium battery pack in the constant-current and trickle states are different, so that the voltages of the multiple lithium battery packs needing to be charged are detected, the conditions of the multiple lithium battery packs are known, the charging state is also known, and the current lithium battery pack is judged to be in the charging state or the discharging state. And then judging the lithium battery pack to be charged by the charging rule database, so as to charge the lithium battery pack to be charged, simultaneously knowing the voltage condition, charging the other lithium battery pack and the current lithium battery pack when the voltage reaches the voltage value of the next lithium battery pack, repeatedly judging, preferentially filling the lithium battery packs in a constant current state, and then performing trickle charging, thereby improving the charging efficiency.
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 executes the method.
By adopting the technical scheme, the charging time and the electric quantity of the lithium battery pack in the constant-current and trickle states are different, so that the voltages of the multiple lithium battery packs needing to be charged are detected, the conditions of the multiple lithium battery packs are known, the charging state is also known, and the current lithium battery pack is judged to be in the charging state or the discharging state. And then judging the lithium battery pack to be charged by the charging rule database, so as to charge the lithium battery pack to be charged, simultaneously knowing the voltage condition, charging the other lithium battery pack and the current lithium battery pack when the voltage reaches the voltage value of the next lithium battery pack, repeatedly judging, preferentially filling the lithium battery packs in a constant current state, and then performing trickle charging, thereby improving the charging efficiency.
In a fourth aspect, the present application provides a computer storage medium, which can store a corresponding program, and has a feature of facilitating the implementation of improving the efficiency of charging a plurality of lithium battery packs simultaneously, and adopts the following technical scheme:
a computer-readable storage medium storing a computer program that can be loaded by a processor and executes the above-mentioned method.
By adopting the technical scheme, the charging time and the electric quantity of the lithium battery pack in the constant-current and trickle states are different, so that the voltages of the multiple lithium battery packs needing to be charged are detected, the conditions of the multiple lithium battery packs are known, the charging state is also known, and the current lithium battery pack is judged to be in the charging state or the discharging state. And then judging the lithium battery pack to be charged by the charging rule database, so as to charge the lithium battery pack to be charged, simultaneously knowing the voltage condition, charging the other lithium battery pack and the current lithium battery pack when the voltage reaches the voltage value of the next lithium battery pack, repeatedly judging, preferentially filling the lithium battery packs in a constant current state, and then performing trickle charging, thereby improving the charging efficiency.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the efficiency of charging a plurality of lithium battery packs simultaneously is improved;
2. and the power supply energy efficiency of the lithium battery pack is improved.
Drawings
Fig. 1 is a flow chart of a method for charging and discharging a lithium battery pack.
Fig. 2 is a flowchart of a method for acquiring the charging and discharging rule database.
Fig. 3 is a flow chart of another method of charging a lithium battery pack.
Fig. 4 is a flow chart of a method of discharging a plurality of lithium battery packs.
Fig. 5 is a flow chart of a method of discharging a plurality of lithium battery packs.
Fig. 6 is a flowchart of a method for determining a discharge state of a lithium battery pack.
Fig. 7 is a flow chart of a method for detecting the connection state of a lithium battery pack before charging.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-7 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses a lithium battery pack charging and discharging method, which improves the efficiency of charging a plurality of lithium battery packs simultaneously, reduces the charging time, and improves the power supply effect of the lithium battery packs.
Referring to fig. 1, lithium cell package need insert the lithium cell package to the charging seat when needs charge and discharge to charge, lithium cell package not only can solitary use when needs power supply simultaneously, also can integrate lithium cell package through the charging seat, thereby carry out the power supply of concentrating.
In this embodiment, the charging and discharging of the lithium battery pack are performed in the charging seat, and the charging seat may be installed with a plurality of lithium battery packs, and the charging and discharging method after the lithium battery pack is inserted into the charging seat includes the following steps:
step 100: the current voltage detection information of a plurality of current lithium battery packs and the current charging state information of the current lithium battery packs are obtained.
And acquiring current voltage detection information of each current lithium battery pack through a voltage sensor.
Acquiring current charging state information of a current lithium battery pack through a current sensor, wherein the current charging state information is a charging state when a charging current exists; when there is a discharge current, this is the state of the discharge supply.
Step 101: and searching the lithium battery pack to be charged from a preset charging rule database according to the current charging state information and the current voltage detection information.
Once the current lithium battery pack is in a discharging state, the current charging state information is received, the voltage detection information of the lithium battery pack is obtained at the moment, and when the voltage detection information is obtained, the voltages of all the lithium battery packs in the discharging state are obtained.
Searching a lithium battery starting pack from a charging rule database, wherein the charging rule database is a preset database, and editing and perfecting the database by a worker so as to determine the lithium battery starting pack; the lithium battery pack to be charged is the lithium battery pack which is charged firstly and is also the lithium battery pack with the least current electric quantity.
Step 102: and charging according to the current voltage detection information of the starting lithium battery pack, updating the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information.
According to the selected starting lithium battery pack, the starting lithium battery pack is charged firstly, current voltage detection information of the starting lithium battery pack is obtained in real time, and therefore the voltage value of the starting lithium battery pack is known, and other temporary uncharged lithium battery packs are also known.
Along with the increase of the charging time, the voltage value of the lithium battery pack started to be charged rises, once the voltage value of the lithium battery pack started to be charged is consistent with the current voltage detection information of another lithium battery pack, the other lithium battery pack is controlled to be synchronously charged with the lithium battery pack started to be charged, and the other lithium battery pack is any lithium battery pack which is not charged.
And if the voltage values of the plurality of lithium battery packs are the same, the plurality of same lithium battery packs are charged together.
Step 103: and indicating until the current voltage detection information is consistent with the preset highest voltage information.
The lithium battery packs are charged in sequence according to different voltage values, the lithium battery pack with the lowest voltage value is charged firstly, after the voltage of the lithium battery pack is consistent with the voltage of the lithium battery pack with the second lowest voltage value, the two battery packs are charged simultaneously, after the voltage value of the lithium battery pack with the third lowest voltage value is consistent, the three battery packs are charged simultaneously, and the like until the current voltage detection information is consistent with the highest voltage information.
The highest voltage information is the full state of the lithium battery pack, so that after the lithium battery pack is full, indication can be performed, and charging can also be stopped.
Referring to fig. 2, the method for acquiring the charge and discharge rule database includes the following steps:
step 200: and judging whether the current voltage detection information is greater than or equal to the preset trickle charge voltage information or not.
And comparing the current voltage detection information with the trickle charge voltage information, and judging whether the current voltage detection information is greater than or equal to the preset trickle charge voltage information or not, so that the current electric quantity state of the lithium battery pack is known.
The trickle charge voltage information is preset information, is in a trickle charge state for the lithium battery pack, and is set by a worker according to an actual situation, and is common knowledge of the skilled worker, and is not described herein again.
Step 201: if the current battery pack is smaller than the preset value, the battery pack is defined as a first-stage battery pack group.
If the current voltage detection information is smaller than the trickle charge voltage information, the battery pack is defined as a first-stage battery pack group, and at the moment, the lithium battery packs are in a constant-current charging state and a large-current charging state.
Step 202: if the battery pack is larger than or equal to the first stage battery pack, the battery pack is defined as a second stage battery pack.
If the current voltage detection information is greater than or equal to the trickle charge voltage information, the battery pack is defined as a second-stage battery pack group, and at the moment, the lithium battery packs are in a trickle charge state and in a low-current charge state.
Step 203: and judging whether the current charge-discharge state information of the first-stage battery pack is in a charge state.
According to different groups, firstly, the lithium battery pack of the first-stage battery pack group is judged, and whether the current charging and discharging state information of the first-stage battery pack group is in a charging state is judged, so that whether charging is needed is judged.
Step 204: and if the current charging and discharging state information is the charging state, sequencing the current voltage detection information in the current lithium battery pack to screen out the minimum value of the current voltage detection information, and defining the current voltage detection information as the starting lithium battery pack.
And if the current charging and discharging state information is the charging state, constant current charging is required, and at the moment, the current voltage detection information in the current lithium battery pack is sequenced, so that the minimum value of the current voltage detection information is screened out, and is defined as a starting lithium battery pack which is the lithium battery pack which is charged firstly.
Referring to fig. 3, when the current voltage detection information of the lithium battery pack from charging is consistent with the current voltage detection information of another lithium battery pack, the charging method of another lithium battery pack includes the following steps:
step 300: and judging whether the current voltage detection information of the currently charged lithium battery pack falls into the first-stage battery pack group or the second-stage battery pack group.
The current voltage detection information of the lithium battery pack which is currently being charged is known, so that the current voltage detection information is judged to fall into a first-stage battery pack group or a second-stage battery pack group, and the charging state of the current lithium battery pack is known.
Step 301: and if the current voltage detection information of the lithium battery pack falls into the first-stage battery pack group, synchronously charging another lithium battery pack which is in the first-stage battery pack group and is consistent with the current voltage detection information.
If the lithium batteries fall into the first-stage battery pack group, the rest lithium battery packs are searched from the first-stage battery pack group, and once the lithium batteries in the first-stage battery pack group are charged, the lithium batteries are deleted from the first-stage battery pack group.
And searching another lithium battery pack consistent with the current voltage detection information in the rest first-stage battery pack groups and controlling the synchronous charging of the lithium battery pack.
Step 302: and if the lithium battery pack falls into the second-stage battery pack group and the first-stage battery pack group does not have the lithium battery pack, synchronously charging the lithium battery pack with the other lithium battery pack in the second-stage battery pack group and consistent with the current voltage detection information.
Once the lithium battery pack falls into the second-stage battery pack group and no lithium battery pack exists in the first-stage battery pack group, another lithium battery pack consistent with the current voltage detection information is found out from the second-stage battery pack group and is charged synchronously with the lithium battery pack.
Step 303: if the battery pack falls into the second-stage battery pack group and a lithium battery pack exists in the first-stage battery pack group, prompting is carried out.
Once the lithium battery pack falls into the second-stage battery pack group and the lithium battery pack exists in the first-stage battery pack group, the problem of the uncharged lithium battery pack in the first-stage battery pack group is solved, and therefore prompting is carried out.
Referring to fig. 4, when the lithium battery packs are discharged, the method for discharging the plurality of lithium battery packs includes the following steps:
step 400: and acquiring current discharging state information of a plurality of current lithium battery packs.
When needs power supply, not charging the lithium cell package of inserting on the connecting seat through the commercial power, the connecting seat can supply power through the lithium cell package of inserting simultaneously, then carries out the discharge state this moment, consequently can appear discharge current, when current sensor detects discharge current, then output discharge state information.
Step 401: and arranging the current voltage detection information in a reverse order according to the current discharge state information, and screening out the lithium battery pack with the highest voltage to define as a starting and discharging lithium battery pack.
When the lithium battery pack is in a discharging state, the current voltage detection information is arranged in a reverse order, the lithium battery pack with the highest voltage is screened out, the lithium battery pack is defined as a starting-discharging lithium battery pack, namely the lithium battery pack with the highest voltage is preferentially discharged, and when the voltage conditions are consistent, the lithium battery pack can be connected in parallel to discharge.
Step 402: and discharging according to the current voltage detection information of the starting and discharging lithium battery pack, updating the current voltage detection information of the starting and discharging lithium battery pack in real time until the current voltage detection information is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information.
When the lithium battery pack is started and discharged, the current voltage detection information of the lithium battery pack is updated in real time, and the current voltage detection information of other lithium battery packs is known.
And once the current voltage detection information of the starting and discharging lithium battery pack is consistent with that of the other lithium battery pack, controlling the starting and discharging lithium battery pack which is currently discharging to synchronously discharge with the other lithium battery pack with the consistent voltage value.
Step 403: until the current voltage detection information is set to the preset discharge protection voltage information.
The lithium battery pack on the connecting seat is synchronously discharged, current voltage detection information of the lithium battery pack which is synchronously discharged is obtained, and once the current voltage detection information is consistent with the discharge protection voltage information, the discharge is stopped, and the discharge is finished at the moment. The information of the discharge protection voltage is preset information, and is set by a worker according to an actual situation, which is not described herein for the common general knowledge of the skilled worker.
Referring to fig. 5, in discharging, when the discharging voltages of the plurality of lithium battery packs are different, the method for discharging the plurality of lithium battery packs comprises the following steps:
step 500: and acquiring current detection information of the current lithium battery pack.
And detecting the current of the current lithium battery pack through the current sensor so as to output the current detection information.
Step 501: discharging according to the current voltage detection information of the lithium battery pack, generating a change curve of the current detection information in the discharging time, and calculating the slope.
The lithium battery pack to be discharged starts discharging from the lithium battery pack with the largest voltage, a change curve of the current detection information is generated in the discharging time, the slope is calculated by inputting the current detection information into the coordinate image, so that the different angles are detected according to the change of the coordinate image, represent different slopes, can be obtained in a table look-up mode, can also be obtained in a mode of angle data measurement or calculation of end point data, belongs to common knowledge of technicians in the field, and is not described herein in detail.
Step 502: and judging whether the slope of the change curve is greater than a preset reference slope.
Whether the slope of the change curve is greater than a reference slope is judged, wherein the reference slope is a preset slope value, and the setting and adjustment are performed by a worker according to the actual situation, which is common knowledge of the skilled worker and is not described herein.
Step 503: if the current voltage of the lithium battery pack is less than the preset voltage, the lithium battery pack continues to discharge until the current voltage of the lithium battery pack is consistent with the current voltage detection information of the other lithium battery pack, so that the other lithium battery pack is controlled to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information.
And if the slope of the change curve is smaller than the reference slope, the normal discharge is indicated, at the moment, the discharge is continued until the current voltage detection information of the other lithium battery pack is consistent, and the other lithium battery pack is controlled to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information.
Step 504: and if the current voltage is larger than or equal to the preset voltage, calculating the voltage difference between the current discharging lithium battery pack and other lithium battery packs, and arranging the current discharging lithium battery pack and other lithium battery packs in a reverse order.
If the slope of the change curve is larger than or equal to the reference slope, the discharge current is over high when the current discharge is shown, the voltage difference between the current discharge lithium battery pack and other lithium battery packs is calculated at the moment, and the lithium battery packs are arranged in a reverse order, so that the lithium battery packs with small voltage difference are selected to be used in parallel.
Step 505: screening the lithium battery pack with the minimum voltage difference, connecting the lithium battery pack with the current discharging lithium battery pack in parallel for discharging, and judging whether the slope of the current change curve is larger than the preset reference slope again.
And after the lithium battery pack with the minimum voltage difference is screened out, the screened lithium battery pack and the current discharging lithium battery pack are connected in parallel to discharge, and whether the slope of the current change curve is larger than or equal to the reference slope is judged again, so that secondary judgment is carried out.
Step 506: and if the current voltage of the lithium battery pack is less than the preset voltage, continuing discharging until the current voltage is consistent with the current voltage detection information of the other lithium battery pack so as to control the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information.
And once the slope of the change curve is smaller than the reference slope, the normal discharge is indicated, and the discharge is continued until the current voltage detection information of the other lithium battery pack is consistent with the current voltage detection information, so that the other lithium battery pack is controlled to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information.
Step 507: if the current change curve is larger than or equal to the preset reference slope, controlling the lithium battery pack with the minimum voltage difference in the lithium battery packs which are not connected in parallel to be connected in parallel with the currently-connected lithium battery pack for discharging, and repeatedly judging whether the slope of the current change curve is larger than the preset reference slope until the slope is smaller than the reference slope.
Once the slope of the change curve is greater than or equal to the reference slope, the abnormal discharge current is represented, so that the lithium battery pack with the minimum voltage difference in the lithium battery packs which are not connected in parallel is found, the found lithium battery pack and the currently connected lithium battery pack which is connected in parallel are connected in parallel for discharging, and whether the slope of the current change curve is greater than the reference slope or not is repeatedly judged until the slope is less than the reference slope.
Step 508: and if all the lithium battery packs are still larger than or equal to the reference slope after being connected in parallel, stopping discharging and prompting.
In the discharging process, all the lithium battery packs are connected in parallel finally along with the reduction of the voltage value and the analysis of the current condition. After parallel connection, if the difference is still larger than or equal to the reference slope, the difference between different lithium battery packs is too large, and a problem occurs in parallel connection, so that discharging is stopped and prompt is given.
Referring to fig. 6, the method for determining the discharge state of the lithium battery pack includes the following steps:
step 600: and acquiring current discharging curve information of the lithium battery pack in the current discharging state and model detection information of the current discharging lithium battery pack.
The lithium battery pack is photographed through the camera, so that different models are corresponded according to different labels on the battery pack, and model detection information is output.
And the discharge curve information is acquired by the voltage sensor in the discharge state.
Step 601: and searching reference discharge information from a preset model database according to the model detection information.
And searching reference discharging information from a model database according to the model detection information, wherein the signal model database is a preset database, and is shot and stored by workers, and the lithium battery packs have different models, so that the charging and discharging data are different.
Step 602: and judging whether the current discharge curve information is consistent with the reference discharge information.
And judging whether the current discharge curve information is consistent with the reference discharge information or not so as to judge whether the discharge is normal or not, and reducing the influence of errors on actual detection because the reference discharge information contains a deviation value.
Step 603: if the voltage is consistent with the voltage, the discharge is continued.
And if the current discharge curve information is consistent with the reference discharge information, the discharge is normal, and the discharge is continued.
Step 604: and if the current lithium battery pack is inconsistent with the preset lithium battery pack, disconnecting the power supply loop of the current lithium battery pack for prompt.
If the current discharging curve information is inconsistent with the reference discharging information, the current discharging is abnormal, so that a power supply loop of the current discharging lithium battery pack is disconnected and prompt is given.
Referring to fig. 7, in order to reduce the foreign matter from covering or interfering the connection port of the connection socket, the lithium battery pack detects the connection state of the connection socket before charging, and the detection method includes the following steps:
step 700: and acquiring the current insertion state information of the connector of the current lithium battery pack.
And detecting the condition of a connecting port of the lithium battery pack through a distance sensor or a grating sensor, thereby outputting the current insertion state information.
Step 701: and judging whether the current insertion state information is consistent with the preset insertion reference information or not.
And judging whether the current insertion state information is consistent with the insertion reference information or not so as to judge whether the lithium battery pack is inserted into the connecting seat or not. The insertion reference information is preset information, and is set by a worker according to an actual situation, which is not described herein.
Step 702: if the voltage values are consistent, the preset power supply loop is closed to charge and discharge the lithium battery pack.
When current insertion state information is unanimous with the insertion benchmark information, it inserts to the connecting seat to show the lithium cell package, need charge or discharge this moment, consequently closed lithium cell package's power supply circuit is in order to supply lithium cell package charge-discharge.
Step 703: and if not, judging whether the connection port of the current lithium battery pack is conducted.
When the current insertion state information is inconsistent with the insertion reference information, whether the connection port of the current lithium battery pack is conducted or not is judged, so that whether a foreign matter contacts the connection port of the lithium battery pack or not is judged, and the short circuit is reduced.
Step 704: and if the current is conducted, prompting.
Once the connector of present lithium cell package switches on, just indicate the foreign matter and switch on the connector, when directly inserting, can lead to the short circuit, consequently indicate.
Based on the same inventive concept, the embodiment of the invention provides a lithium battery pack charging and discharging system, which comprises:
the acquisition module is used for acquiring current voltage detection information of a plurality of current lithium battery packs and current charging state information of the current lithium battery packs;
the searching module searches a lithium battery charging start pack from a preset charging rule database according to the current charging state information and the current voltage detection information;
the processing module is connected with the acquisition module and the search module and is used for storing and processing information;
the processing module charges the lithium battery pack according to the current voltage detection information of the starting lithium battery pack, updates the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information of the starting lithium battery pack is consistent with the current voltage detection information of another lithium battery pack, and controls the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information; until the current voltage detection information is consistent with the preset highest voltage information.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
An embodiment of the present invention provides a computer-readable storage medium storing a computer program that can be loaded by a processor and execute a lithium battery pack charging and discharging method.
Computer storage media include, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
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 is stored with a computer program which can be loaded by the processor and can execute a lithium battery pack charging and discharging method.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. A lithium battery pack charging and discharging method is characterized by comprising the following steps:
acquiring current voltage detection information of a plurality of current lithium battery packs and current charging state information of the current lithium battery packs;
searching a lithium battery charging starting pack from a preset charging rule database according to the current charging state information and the current voltage detection information;
charging according to the current voltage detection information of the starting lithium battery pack, updating the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information;
and indicating until the current voltage detection information is consistent with the preset highest voltage information.
2. The method of claim 1, wherein the method comprises: the method for acquiring the charging and discharging rule database comprises the following steps:
judging whether the current voltage detection information is greater than or equal to the preset trickle charge voltage information or not;
if the current battery pack is smaller than the preset value, defining the battery pack as a first-stage battery pack group;
if the battery pack is larger than or equal to the first stage battery pack, defining the battery pack as a second stage battery pack group;
judging whether the current charge-discharge state information of the battery pack group at the first stage is in a charge state;
and if the current charging and discharging state information is the charging state, sequencing the current voltage detection information in the current lithium battery pack to screen out the minimum value of the current voltage detection information, and defining the current voltage detection information as the starting lithium battery pack.
3. The method of claim 2, wherein the step of charging and discharging the lithium battery pack comprises the steps of: when the current voltage detection information of the starting lithium battery pack is consistent with the current voltage detection information of another lithium battery pack, the charging method of another lithium battery pack comprises the following steps:
judging whether the current voltage detection information of the currently charged lithium battery pack falls into the first-stage battery pack group or the second-stage battery pack group;
if the current voltage detection information of the first-stage battery pack group is consistent with the current voltage detection information of the first-stage battery pack group, synchronously charging another lithium battery pack;
if the battery pack falls into the second-stage battery pack group and no lithium battery pack exists in the first-stage battery pack group, synchronously charging another lithium battery pack which is in the second-stage battery pack group and is consistent with the current voltage detection information;
if the battery pack falls into the second-stage battery pack group and a lithium battery pack exists in the first-stage battery pack group, prompting is carried out.
4. The method of claim 1, wherein the method comprises: the method for discharging a plurality of lithium battery packs comprises the following steps:
acquiring current discharging state information of a plurality of current lithium battery packs;
arranging the current voltage detection information in a reverse order according to the current discharge state information, and screening out the lithium battery pack with the highest voltage to define the lithium battery pack as a starting and discharging lithium battery pack;
discharging according to the current voltage detection information of the starting and discharging lithium battery pack, updating the current voltage detection information of the starting and discharging lithium battery pack in real time until the current voltage detection information of the starting and discharging lithium battery pack is consistent with the current voltage detection information of another lithium battery pack, and controlling the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information;
until the current voltage detection information is set to the preset discharge protection voltage information.
5. The method of claim 4, wherein the step of charging and discharging the lithium battery pack comprises the steps of: when the discharge voltages of the multiple lithium battery packs are different, the method for discharging the multiple lithium battery packs comprises the following steps:
acquiring current detection information of a current lithium battery pack;
discharging according to the current voltage detection information of the starting and discharging lithium battery pack, generating a change curve of the current detection information in the discharging time, and calculating the slope;
judging whether the slope of the change curve is greater than a preset reference slope or not;
if the current voltage of the lithium battery pack is less than the preset voltage, continuing to discharge until the current voltage is consistent with the current voltage detection information of the other lithium battery pack so as to control the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information;
if the current voltage is larger than or equal to the preset voltage, calculating the voltage difference between the current discharging lithium battery pack and other lithium battery packs, and arranging the current discharging lithium battery pack and other lithium battery packs in a reverse order;
screening out the lithium battery pack with the minimum voltage difference, connecting the lithium battery pack with the current discharging lithium battery pack in parallel for discharging, and judging whether the slope of the current change curve is greater than the preset reference slope again;
if the current voltage of the lithium battery pack is less than the preset voltage, continuing discharging until the current voltage is consistent with the current voltage detection information of the other lithium battery pack so as to control the other lithium battery pack to synchronously discharge with the lithium battery pack corresponding to the current voltage detection information;
if the voltage difference is larger than or equal to the preset reference slope, controlling the lithium battery pack with the minimum voltage difference in the lithium battery packs which are not connected in parallel to be connected in parallel with the currently-connected lithium battery pack for discharging, and repeatedly judging whether the slope of the current change curve is larger than the preset reference slope or not until the slope is smaller than the reference slope;
and if all the lithium battery packs are still larger than or equal to the reference slope after being connected in parallel, stopping discharging and prompting.
6. The method of claim 4, wherein the step of charging and discharging the lithium battery pack comprises the steps of: the method for judging the discharge state of the lithium battery pack comprises the following steps:
acquiring current discharge curve information of a lithium battery pack in a current discharge state and model detection information of the current discharge lithium battery pack;
searching reference discharge information from a preset model database according to the model detection information;
judging whether the current discharge curve information is consistent with the reference discharge information;
if the voltage is consistent with the preset voltage, continuing discharging;
and if the current lithium battery pack is inconsistent with the preset lithium battery pack, disconnecting the power supply loop of the current lithium battery pack for prompt.
7. The method of claim 1, wherein the method comprises: the lithium battery pack detects the connection state before charging, and the detection method comprises the following steps:
acquiring current insertion state information of a connector of a current lithium battery pack;
judging whether the current insertion state information is consistent with the preset insertion reference information or not;
if the voltage values are consistent, closing a preset power supply loop to charge and discharge the lithium battery pack;
if the current lithium battery pack is inconsistent with the preset lithium battery pack, judging whether a connection port of the current lithium battery pack is conducted;
and if the current is conducted, prompting.
8. A lithium battery pack charge and discharge system is characterized by comprising:
the acquisition module is used for acquiring current voltage detection information of a plurality of current lithium battery packs and current charging state information of the current lithium battery packs;
the searching module searches a lithium battery charging start pack from a preset charging rule database according to the current charging state information and the current voltage detection information;
the processing module is connected with the acquisition module and the search module and is used for storing and processing information;
the processing module charges the lithium battery pack according to the current voltage detection information of the starting lithium battery pack, updates the current voltage detection information of the starting lithium battery pack in real time until the current voltage detection information of the starting lithium battery pack is consistent with the current voltage detection information of another lithium battery pack, and controls the other lithium battery pack to be synchronously charged with the lithium battery pack corresponding to the current voltage detection information; until the current voltage detection information is consistent with the preset highest voltage information.
9. An intelligent terminal, comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 7.
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