CN114221413A - Charging method, charging device, charger, battery and storage medium - Google Patents

Charging method, charging device, charger, battery and storage medium Download PDF

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Publication number
CN114221413A
CN114221413A CN202111538228.2A CN202111538228A CN114221413A CN 114221413 A CN114221413 A CN 114221413A CN 202111538228 A CN202111538228 A CN 202111538228A CN 114221413 A CN114221413 A CN 114221413A
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CN
China
Prior art keywords
charger
battery
current value
charging
shutdown instruction
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Pending
Application number
CN202111538228.2A
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Chinese (zh)
Inventor
洪钦潮
于江涛
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Guangzhou Xaircraft Technology Co Ltd
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Guangzhou Xaircraft Technology Co Ltd
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Priority to CN202111538228.2A priority Critical patent/CN114221413A/en
Publication of CN114221413A publication Critical patent/CN114221413A/en
Pending legal-status Critical Current

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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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The embodiment of the invention discloses a charging method, a charging device, a charger, a battery and a storage medium, wherein the charging method comprises the following steps: when a pre-shutdown instruction sent by a first battery is received, acquiring an overcurrent protection threshold value of a second battery, wherein the second battery is a battery other than the first battery in the batteries charged by the charger; determining a target charging current value of the charger according to the overcurrent protection threshold value; the target charging current value is set to the output current value of the charger. In the embodiment of the invention, the battery can send the pre-shutdown instruction to the charger, and the charger can set the output current value according to the overcurrent protection threshold value of the remaining second batteries, so that the current value output by the charger before the shutdown of the first battery is already smaller than the overcurrent protection threshold value of the remaining second batteries, the second batteries can not be subjected to overcurrent protection after the shutdown of the first battery to stop charging, and the normal charging of the remaining second batteries is ensured.

Description

Charging method, charging device, charger, battery and storage medium
Technical Field
The embodiment of the invention relates to the technical field of charging, in particular to a charging method, a charging device, a charger, a battery and a storage medium.
Background
The battery is widely applied to plant protection equipment such as unmanned aerial vehicles and unmanned vehicles as a common power supply, the battery needs to be charged by using a charger, and the charger generally charges a plurality of batteries simultaneously in order to improve the charging efficiency of the charger.
When charging one to many, a plurality of batteries are connected in parallel at the charger current output end, if a certain battery in the plurality of batteries stops charging, the battery is directly shut down, and in the moment of shutting down the battery, the current originally charged to the battery that is shut down in the charger can be applied to other batteries, possibly causing the charging current of other batteries to be larger than the overcurrent protection threshold value, triggering other batteries to stop charging, and needing to manually solve the problem of continuing to charge other batteries after overcurrent protection.
Disclosure of Invention
The embodiment of the invention provides a charging method, a charging device, a charger, batteries and a storage medium, which are used for solving the problem that in the existing one-to-many charging, the batteries in a plurality of batteries stop charging to trigger overcurrent protection of other batteries so as to stop charging.
In a first aspect, an embodiment of the present invention provides a charging method, applied to a charger to charge multiple batteries, including:
when a pre-shutdown instruction sent by a first battery is received, acquiring an overcurrent protection threshold value of a second battery, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
determining a target charging current value of the charger according to the overcurrent protection threshold value;
setting the target charging current value as an output current value of the charger.
Optionally, the number of the second batteries is at least two, and the determining the target charging current value of the charger according to the overcurrent protection threshold includes:
determining a minimum over-current protection threshold value from the over-current protection threshold values of the plurality of second batteries;
and determining a target charging current value of the charger according to the minimum overcurrent protection threshold value.
Optionally, the determining a target charging current value of the charger according to the minimum overcurrent protection threshold includes:
counting the number of the second batteries;
and calculating the ratio of the minimum overcurrent protection threshold value to the number of the batteries to obtain a target charging current value.
Optionally, after setting the target charging current value as the output current value of the charger, the method further includes:
judging whether a first shutdown instruction sent by the first battery is received within a preset time length from the receiving of the pre-shutdown instruction;
if so, adjusting the output current value of the charger;
if not, adjusting the output current value of the charger from the target charging current value to an original charging current value, wherein the original charging current value is the output current value of the charger before the pre-shutdown instruction is not received;
optionally, the first battery is provided with a charge-discharge switch, and after the target charging current value is set as the output current value of the charger, the method further includes:
sending a second shutdown instruction to the first battery, wherein the first battery controls the charging and discharging switch to be in a disconnected state after receiving the second shutdown instruction;
and adjusting the output current value of the charger.
Optionally, adjusting the output current value of the charger includes:
acquiring the charging current values of all second batteries before the pre-shutdown instruction is not received;
calculating the sum of the charging current values of all the second batteries to obtain a total current value;
setting the total current value as an output current value of the charger.
In a second aspect, an embodiment of the present invention provides a charging method applied to a first battery in charging, including:
when a pre-shutdown event is detected, sending a pre-shutdown instruction to a charger, wherein the charger is used for acquiring an overcurrent protection threshold value of a second battery when receiving the pre-shutdown instruction, determining a target charging current value of the charger according to the overcurrent protection threshold value, and setting the target charging current value as an output current value of the charger, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
and within a preset time length after the pre-shutdown instruction is sent, when a shutdown event is detected, sending a first shutdown instruction to the charger and shutting down the charger, wherein the charger is used for adjusting the output current value of the charger after receiving the first shutdown instruction.
Optionally, the first battery is provided with a key, and the pre-shutdown event is a preset trigger event for the key, or a full charge event of the first battery.
Optionally, the first battery is provided with a charge-discharge switch, and after sending a pre-shutdown instruction to the charger, the method further includes:
and when a second shutdown instruction sent by the charger is received, controlling the charging and discharging switch to be in a disconnected state.
In a third aspect, an embodiment of the present invention provides a charging device, including:
the overcurrent protection threshold acquisition module is used for acquiring an overcurrent protection threshold of a second battery when a pre-shutdown instruction sent by a first battery is received, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
the target charging current value determining module is used for determining a target charging current value of the charger according to the overcurrent protection threshold value;
and the output current value setting module is used for setting the target charging current value as the output current value of the charger.
Optionally, the number of the second batteries is at least two, and the target charging current value determination module includes:
a minimum overcurrent protection threshold determination submodule for determining a minimum overcurrent protection threshold from the plurality of overcurrent protection thresholds of the second battery;
and the target charging current value calculation submodule is used for determining the target charging current value of the charger according to the minimum overcurrent protection threshold value.
Optionally, the target charging current value calculation submodule includes:
the battery number counting unit is used for counting the battery number of the second battery;
and the target charging current value calculating unit is used for calculating the ratio of the minimum overcurrent protection threshold value to the number of the batteries to obtain a target charging current value.
Optionally, the method further includes:
the judging module is used for judging whether a first shutdown instruction sent by the first battery is received within a preset time length from the receiving of the pre-shutdown instruction;
the first output current value adjusting module is used for adjusting the output current value of the charger;
an output current value recovery module, configured to adjust an output current value of the charger from the target charging current value to an original charging current value, where the original charging current value is the output current value of the charger before the pre-shutdown instruction is not received;
and the preset duration is the duration which is counted after the pre-shutdown instruction is received.
Optionally, the first battery is provided with a charge and discharge switch, and further includes:
the second shutdown instruction sending module is used for sending a second shutdown instruction to the first battery, and the first battery controls the charging and discharging switch to be in a disconnected state after receiving the second shutdown instruction;
and the second output current value adjusting module is used for adjusting the output current value of the charger.
Optionally, the first output current value adjusting module includes:
the charging current value acquisition submodule is used for acquiring the charging current values of all the second batteries before the pre-shutdown instruction is not received;
the total current value calculation submodule is used for calculating the sum of the charging current values of all the second batteries to obtain a total current value;
and the output current value adjusting submodule is used for setting the total current value as the output current value of the charger.
In a fourth aspect, an embodiment of the present invention provides a charging device applied to a battery, including:
the pre-shutdown device comprises a pre-shutdown instruction sending module, a charger and a control module, wherein the pre-shutdown instruction sending module is used for sending a pre-shutdown instruction to the charger when a pre-shutdown event is detected, the charger is used for obtaining an overcurrent protection threshold value of a second battery when receiving the pre-shutdown instruction, determining a target charging current value of the charger according to the overcurrent protection threshold value, and setting the target charging current value as an output current value of the charger, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
and the shutdown instruction sending module is used for sending a first shutdown instruction to the charger and shutting down the charger when a shutdown event is detected within a preset time length after the pre-shutdown instruction is sent, and the charger is used for adjusting the output current value of the charger after receiving the first shutdown instruction.
Optionally, the first battery is provided with a key, and the pre-shutdown event is a preset trigger event for the key, or a full charge event of the first battery.
Optionally, the first battery is provided with a charge and discharge switch, and further includes:
and the charge and discharge switch control module is used for controlling the charge and discharge switch to be in a disconnected state when receiving a second shutdown instruction sent by the charger.
In a fifth aspect, an embodiment of the present invention provides a charger, including:
one or more processors;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the charging method according to the first aspect of the present invention.
In a sixth aspect, an embodiment of the present invention provides a battery, including:
one or more processors;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the charging method according to the second aspect of the present invention.
In a seventh aspect, the embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and the program, when executed by a processor, implements the charging method described in the first aspect and/or the second aspect of the present invention.
The embodiment of the invention is applied to a charging method for a charger to charge a plurality of batteries, and the over-current protection threshold value of a second battery is obtained when a pre-shutdown instruction sent by a first battery is received, the second battery is a battery except the first battery in the batteries charged by the charger, determining a target charging current value of the charger according to the overcurrent protection threshold value, setting the target charging current value as an output current value of the charger, because the battery can send the pre-shutdown instruction to the charger, the charger can set the output current value according to the overcurrent protection threshold value of the rest second batteries, so that the current value output by the charger before the shutdown of the first battery is already smaller than the overcurrent protection threshold value of the rest second batteries, after the first battery is shut down, the second battery cannot be subjected to overcurrent protection to stop charging, and the normal charging of the remaining second battery is ensured.
Drawings
Fig. 1 is a flowchart illustrating steps of a charging method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a charging method according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a charging method according to a third embodiment of the present invention;
fig. 4 is a block diagram of a charging device according to a fourth embodiment of the present invention;
fig. 5 is a block diagram of a charging device according to a fifth embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a flowchart of a charging method according to an embodiment of the present invention, where the charging method according to an embodiment of the present invention is applicable to a case where a charger charges a plurality of batteries, and the charging method may be executed by a charging apparatus according to an embodiment of the present invention, where the charging apparatus may be implemented in a software and/or hardware manner and is integrated in the charger according to the present invention, as shown in fig. 1, the charging method specifically includes the following steps:
s101, when a pre-shutdown instruction sent by a first battery is received, acquiring an overcurrent protection threshold value of a second battery, wherein the second battery is a battery other than the first battery in batteries charged by the charger.
In the embodiment of the present invention, the charger may charge one or more batteries, and the charger is provided with a plurality of charging interfaces connected in parallel, for example, after one or more batteries are connected to the charger through the charging interfaces, the BMS of each battery may be connected to a communication board of the charger, so that the BMS of each battery may communicate with the charger.
The battery may be provided with a key, and different pressing modes of the key may trigger different events to occur, for example, a short pressing of the key triggers the battery to enter a pre-shutdown state, and a long pressing of the key triggers the battery to shutdown in the pre-shutdown state, where the short pressing may be a pressing for 1 second, and the long pressing may be a pressing for 3 seconds or more than 3 seconds. Of course, the BMS for the battery may also trigger the battery to enter a pre-shutdown state when it detects or will soon be fully charged.
In the process that the charger charges the plurality of batteries, a user can stop charging one of the batteries, and then can press a key on the battery, so that the battery enters a pre-shutdown state, the battery entering the pre-shutdown state is a first battery, the battery not entering the pre-shutdown state is a second battery, and the second battery is a battery other than the first battery in the batteries charged by the charger. When the battery enters the pre-shutdown state, a pre-shutdown instruction can be sent to the charger to inform the charger that the battery is about to be shut down.
After receiving the pre-shutdown instruction sent by the first battery, the charger may communicate with the remaining second batteries, and read an overcurrent protection threshold of the second batteries from the BMS of the plurality of second batteries, where the overcurrent protection threshold is a maximum charging current value that triggers overcurrent protection of the batteries to stop charging.
And S102, determining a target charging current value of the charger according to the overcurrent protection threshold value.
In an optional embodiment of the present invention, when the number of the second batteries is one, the target charging current value may be determined by directly subtracting a preset value from the overcurrent protection threshold, and when the number of the second batteries is multiple, the minimum overcurrent protection threshold may be determined from the overcurrent protection thresholds of the multiple second batteries, and the minimum overcurrent protection threshold is determined as the target charging current value, or a ratio of the minimum overcurrent protection threshold to the number of the second batteries may be calculated as the target charging current value.
And S103, setting the target charging current value as the output current value of the charger.
In the embodiment of the invention, the plurality of batteries are connected in parallel to the charging interface of the charger, theoretically, the output current value of the charging interface is the sum of the charging current values of the batteries, so that the target charging current value can be set as the output current value of the charger, the charger outputs the charging current with the target charging current value, and the charging current output by the charger is shared by the batteries because the batteries are connected in parallel to the charging interface, so that the charging current value of each second battery is smaller than the overcurrent protection threshold value, and even if the first battery is shut down after being in a pre-shutdown state, the second battery cannot be subjected to overcurrent protection stop charging because the charging circuit is larger than the overcurrent protection threshold value.
It should be noted that, after the charger sets the output current value, the charger may send a response message to the first battery to notify the first battery, so that the first battery prompts the user to operate the key to stop charging the first battery after receiving the success of setting the output current value by the charger.
The embodiment of the invention is applied to a charging method for a charger to charge a plurality of batteries, and the over-current protection threshold value of a second battery is obtained when a pre-shutdown instruction sent by a first battery is received, the second battery is a battery except the first battery in the batteries charged by the charger, determining a target charging current value of the charger according to the overcurrent protection threshold value, setting the target charging current value as an output current value of the charger, because the battery can send the pre-shutdown instruction to the charger, the charger can set the output current value according to the overcurrent protection threshold value of the rest second batteries, so that the current value output by the charger before the shutdown of the first battery is already smaller than the overcurrent protection threshold value of the rest second batteries, after the first battery is shut down, the second battery cannot be subjected to overcurrent protection to stop charging, and the normal charging of the remaining second battery is ensured.
Example two
Fig. 2 is a flowchart of a charging method according to a second embodiment of the present invention, which is optimized based on the first embodiment of the present invention, specifically, as shown in fig. 2, the charging method according to the second embodiment of the present invention may include the following steps:
s201, when a pre-shutdown instruction sent by a first battery is received, acquiring an overcurrent protection threshold of a second battery, wherein the second battery is a battery other than the first battery in the batteries charged by the charger.
In the embodiment of the present invention, the charger may charge one or more batteries, and after the one or more batteries are connected to the charger through the charging interface, the BMS of each battery may be connected to the communication board of the charger, so that the BMS of each battery may communicate with the charger.
The battery can be provided with the button, and the different mode of pressing of this button can trigger different incident and take place, for example through pressing the button for a short time and triggering the battery and get into pre-shutdown state, press the button for a long time under pre-shutdown state and trigger the battery and shut down, when needing to stop charging to first battery, press the button of first battery for a short time, the BMS of first battery is awaken up and sends the instruction of pre-shutdown to the charger.
After receiving the pre-shutdown instruction sent by the first battery, the charger may communicate with the remaining second batteries, and read an overcurrent protection threshold of the second batteries from the BMS of the plurality of second batteries, where the overcurrent protection threshold is a maximum charging current value that triggers overcurrent protection of the batteries to stop charging, and the number of the second batteries may be at least two, for example, two or more.
S202, determining a minimum overcurrent protection threshold value from the overcurrent protection threshold values of the second batteries.
When the number of the second batteries is multiple, the specifications of the second batteries may be different, and the overcurrent protection threshold values of the second batteries may also be different, so that multiple overcurrent protection threshold values can be obtained, and the minimum overcurrent protection threshold value is determined from the multiple overcurrent protection threshold values.
S203, determining a target charging current value of the charger according to the minimum overcurrent protection threshold value.
In an optional embodiment of the present invention, the number of batteries of the second battery may be counted, and a ratio of the minimum overcurrent protection threshold to the number of batteries may be calculated to obtain the target charging current value. For example, there are currently charged batteries A, B and C, battery a enters the pre-shutdown state, the second batteries are battery B and battery C, the overcurrent protection threshold of battery B is 110mA, and the overcurrent protection threshold of battery C is 130mA, then it may be determined that the minimum overcurrent protection threshold is 110mA, and the target charging current value is 110/2 ═ 55 mA. Certainly, in practical application, the target charging current value may be obtained by subtracting the preset value from the minimum overcurrent protection threshold and then making a ratio with the number of the second batteries, and certainly, the target charging current value may be calculated by adopting other manners by adopting the minimum overcurrent threshold, for example, a preset percentage (80%) of the minimum overcurrent threshold is taken as the target charging current value.
After the number of the second batteries is counted, the ratio of the minimum overcurrent protection threshold value to the number of the batteries is calculated to obtain the target charging current value, so that the charging current of each second battery is smaller than the overcurrent protection threshold value at the moment when the first battery stops charging after shutdown, and the set target charging current value is high in reliability.
And S204, judging whether a shutdown instruction sent by the first battery is received within a preset time length from the receiving of the pre-shutdown instruction.
After the output current value is set by the charger, the charger can send a response message to the first battery to inform the first battery, so that the first battery prompts a user to operate the key to stop charging the first battery after the first battery receives the success of setting the output current value by the charger.
Optionally, the charger starts a timer to count the time length when receiving the pre-shutdown instruction sent by the first battery. After the first battery enters the pre-shutdown state, if the user presses the key for a long time, the first battery sends a shutdown instruction to the charger and shuts down the battery, for example, the preset time length may be 10 seconds, that is, it is determined whether a joint instruction sent by the first battery is received within 10 seconds from when the pre-shutdown instruction is received, if yes, S205 is executed, and if not, S206 is executed.
And S205, adjusting the output current value of the charger.
In an optional embodiment, the charging current values of all the second batteries before the pre-shutdown instruction is not received may be obtained, the sum of the charging current values of all the second batteries is calculated to obtain a total current value, and the total current value is set as the output current value of the charger.
In practical application, overcurrent protection can be performed on the second battery at the moment of shutdown of the first battery, that is, a smaller target charging current value is set at the moment of shutdown of the first battery to protect the second battery from triggering overcurrent protection, and after the first battery is shut down, in order to improve the charging efficiency of the second battery, the charging current value of the charger can be adjusted to improve the charging efficiency of the second battery. In an example, the charging current value of each second battery before the pre-shutdown instruction is not received may be used as a reference, for example, the charger may record the charging current value of each second battery every time a pre-shutdown instruction is received, calculate a sum of the recorded charging current values of each second battery as a total current value after the shutdown instruction of the first battery is received, and set the total current value as the output current value of the charger.
For example, the charger charges battery a, battery B, and battery C, records the charging current values of battery a, battery B, and battery C as 35mA, 75mA, and 60mA respectively, sets the target charging current value as 55mA when receiving the pre-shutdown instruction sent by first battery a, and after receiving the shutdown instruction sent by first battery a, first battery a has been shut down, and if the charging is continued at target charging current value 55mA, the charging current shared by battery B and battery C is less than 55mA, the charging efficiency is low, and in order to improve the charging efficiency, the sum of the recorded charging current values of battery B and battery C, i.e., 75+60, may be calculated as 135mA, and the output current value to be charged is set as 135mA, so that battery B may be charged at a charging current of 75mA, battery C may be charged at a charging current of 60mA, and the charging efficiency is high.
Of course, the charger may also communicate with the BMS of each second battery after receiving the shutdown command of the first battery, the BMS determines the charging current value of each second battery according to the power, temperature, and other factors of the second battery, and the charger determines the output current value according to the charging current value of each second battery returned by the BMS.
S206, adjusting the output current value of the charger from the target charging current value to an original charging current value, wherein the original charging current value is the output current value of the charger before the pre-shutdown instruction is not received.
After the first battery is in a pre-shutdown state and the output current value is adjusted to be the target charging current value, if a shutdown instruction sent by the first battery is not received within a preset time period, the user cancels shutdown of the first battery, or the pre-shutdown instruction is a key for the user to operate the first battery by mistake.
In another alternative embodiment of the present invention, the battery may be provided with a charge and discharge switch, when the charge and discharge switch is in an off state, the battery cannot be discharged and charged, when the charge-discharge switch is in a connected state, the battery can be discharged outwards or charged, the charging and discharging switch can control the state through the BMS of the battery, and based on the state, the charger receives the pre-shutdown command sent by the battery, and after setting the target charging current value as the output current value of the charger, a second shutdown instruction may be sent to the first battery, so that after receiving the second shutdown instruction, the charging and discharging switches are controlled to be in a disconnected state by the BMS system, a charging loop between the first battery and the charger is in a disconnected state, and then, the output current value of the charger may be adjusted, and specifically, the adjustment process may refer to S205. In the optional embodiment, the battery is provided with a charge and discharge switch, and the battery is controlled to be shut down by sending a shutdown instruction through the charger, on one hand, an additional switch and a control circuit are not required to be added between the charger and the battery, so that the circuit of the charger is simplified, the cost is reduced, on the other hand, after the battery enters a pre-shutdown state, the charger controls to send the shutdown instruction to control the battery to be shut down, a user does not need to operate a key to shut down the battery at the battery, and the battery shutdown process is safer and more reliable.
The embodiment of the invention obtains the overcurrent protection threshold value of the second battery when receiving the pre-shutdown instruction sent by the first battery, determines the minimum overcurrent protection threshold value from the overcurrent protection threshold values of the plurality of second batteries, determines the target charging current value of the charger according to the minimum overcurrent protection threshold value, judges whether the shutdown instruction sent by the first battery is received within the preset time length after the pre-shutdown instruction is received, if so, adjusts the output current value of the charger after the shutdown instruction is received, if not, adjusts the output current value of the charger from the target charging current value to the original charging current value, wherein the original charging current value is the output current value of the charger before the pre-shutdown instruction is not received And the current protection threshold value prevents the second battery from being charged due to overcurrent protection after the first battery is shut down, so that the normal charging of the rest second batteries is ensured.
Furthermore, after the shutdown instruction of the first battery is received, the charging current values of all the second batteries before the shutdown instruction is not received are obtained, the sum of the charging current values of all the second batteries is calculated to obtain the total current value, the total current value is set as the output current value of the charger, the output current value is reset to charge the second batteries after the shutdown of the first battery is realized, and the charging efficiency of the second batteries is improved.
Furthermore, when the first battery shutdown instruction is not received within the preset time, the output current value of the charger is adjusted to the output current value of the charger before the pre-shutdown instruction is not received, so that the shutdown of the first battery can be cancelled by a user, or the charging current value of the charger is restored to the output current value of the charger before the pre-shutdown instruction is not received when the user performs misoperation on the first battery, thereby avoiding misoperation and improving the charging efficiency of the charger.
EXAMPLE III
Fig. 3 is a flowchart of a charging method provided in a third embodiment of the present invention, where the third embodiment of the present invention is applicable to a case where a charger charges a plurality of batteries, and the method may be executed by a charging device in the third embodiment of the present invention, where the charging device may be implemented in a software and/or hardware manner and is integrated in a battery of the present invention, as shown in fig. 3, the charging method specifically includes the following steps:
s301, when a pre-shutdown event is detected, sending a pre-shutdown instruction to the charger.
In the embodiment of the present invention, the charger may charge one or more batteries, and the charger is provided with a plurality of charging interfaces connected in parallel, for example, after one or more batteries are connected to the charger through the charging interfaces, the BMS of each battery may be connected to a communication board of the charger, so that the BMS of each battery may communicate with the charger.
The battery may be provided with a key, and different pressing modes of the key may trigger different events to occur, for example, a short pressing of the key triggers the battery to enter a pre-shutdown state, and a long pressing of the key triggers the battery to shutdown in the pre-shutdown state, where the short pressing may be a pressing for 1 second, and the long pressing may be a pressing for 3 seconds or more than 3 seconds. Of course, the BMS for the battery may also trigger the battery to enter a pre-shutdown state when it detects or will soon be fully charged.
The pre-shutdown event may be a preset key event, a full battery charge event, or the like, and the battery may detect whether the pre-shutdown event occurs on the battery according to a preset period, for example, whether a key of the battery is pressed for a short time, whether the battery is fully charged, or the like, and if so, the battery is used as a first battery, otherwise, the battery is used as a second battery, the first battery sends a pre-shutdown command to the charger, the charger obtains an overcurrent protection threshold value of the second battery when receiving a pre-shutdown instruction, determines a target charging current value of the charger according to the overcurrent protection threshold value, sets the target charging current value as an output current value of the charger, the second battery is a battery other than the first battery among the batteries charged by the charger, and the charger may determine the target charging current value and set the output current value according to the first embodiment or the second embodiment, which is not described in detail herein.
S302, within a preset time length after the pre-shutdown instruction is sent, when a shutdown event is detected, sending a first shutdown instruction to the charger and shutting down the charger.
In an optional embodiment, the charger may send a response message to the first battery after receiving a pre-shutdown instruction sent by the first battery and setting an output current value, and the first battery may prompt the user to perform a shutdown operation after receiving the response message, for example, an indicator lamp on the first battery indicates that the user may stop charging the first battery by long-pressing a key, or a voice message is broadcasted to prompt the user to long-press a key, and the like. When the first battery detects that the user presses a key for a long time within a preset time period after sending the pre-shutdown instruction, the first battery is generated and sent to the charger, and then the first battery is shut down, and the charger adjusts the output current value of the charger after receiving the first shutdown instruction.
In another embodiment, the first battery is provided with a charge and discharge switch, the battery cannot be discharged and charged when the charge and discharge switch is in an off state, the battery can be discharged to the outside or charged when the charge and discharge switch is in an on state, the charge and discharge switch can control the state through a BMS of the battery, and based on the state, the charger can send a second shutdown instruction to the first battery after receiving a pre-shutdown instruction sent by the battery and setting a target charging current value as an output current value of the charger.
When the first battery receives a second shutdown instruction sent by the charger, the charge and discharge switch may be controlled to be in an off state, and for example, the charge and discharge switch may be controlled to be in an off state by the BMS system, and a charge loop between the first battery and the charger is in an off state, that is, the battery is shut down. In the embodiment, the battery is provided with the charge and discharge switch, and the battery is controlled to be shut down by sending the shutdown instruction through the charger, so that on one hand, an additional switch and a control circuit are not required to be added between the charger and the battery, the circuit of the charger is simplified, the cost is reduced, on the other hand, after the battery enters the pre-shutdown state, the charger controls to send the shutdown instruction to control the battery to be shut down, a user does not need to operate a key to shut down the battery through the battery, and the battery shutdown process is safer and more reliable.
According to the charging method provided by the embodiment of the invention, when the battery detects a pre-shutdown event, a pre-shutdown instruction is sent to the charger, so that the charger obtains an overcurrent protection threshold value of the second battery when receiving the pre-shutdown instruction, a target charging current value of the charger is determined according to the overcurrent protection threshold value, the target charging current value is set as an output current value of the charger, the first battery sends a shutdown instruction to the charger and shuts down the battery within a preset time length after sending the pre-shutdown instruction when detecting the shutdown event, and the charger adjusts the output current value of the charger after receiving the shutdown instruction. Because the battery can send the pre-shutdown instruction to the charger, the charger can set the output current value according to the overcurrent protection threshold value of the rest second batteries, the current value output by the charger before the shutdown of the first battery is already smaller than the overcurrent protection threshold value of the rest second batteries, the second batteries can not be subjected to overcurrent protection to stop charging after the shutdown of the first battery, and the rest second batteries can be ensured to be charged normally.
Example four
Fig. 4 is a schematic structural diagram of a charging device according to a fourth embodiment of the present invention, and as shown in fig. 4, the charging device according to the fourth embodiment of the present invention is applied to a charger, and includes:
an overcurrent protection threshold acquisition module 401, configured to acquire an overcurrent protection threshold of a second battery when a pre-shutdown instruction sent by a first battery is received, where the second battery is a battery other than the first battery among batteries charged by the charger;
a target charging current value determining module 402, configured to determine a target charging current value of the charger according to the overcurrent protection threshold;
an output current value setting module 403, configured to set the target charging current value as an output current value of the charger.
Optionally, the number of the second batteries is at least two, and the target charging current value determining module 402 includes:
a minimum overcurrent protection threshold determination submodule for determining a minimum overcurrent protection threshold from the plurality of overcurrent protection thresholds of the second battery;
and the target charging current value calculation submodule is used for determining the target charging current value of the charger according to the minimum overcurrent protection threshold value.
Optionally, the target charging current value calculation submodule includes:
the battery number counting unit is used for counting the battery number of the second battery;
and the target charging current value calculating unit is used for calculating the ratio of the minimum overcurrent protection threshold value to the number of the batteries to obtain a target charging current value.
Optionally, the method further includes:
the judging module is used for judging whether a first shutdown instruction sent by the first battery is received within a preset time length from the receiving of the pre-shutdown instruction;
the output current value adjusting module is used for adjusting the output current value of the charger;
an output current value recovery module, configured to adjust an output current value of the charger from the target charging current value to an original charging current value, where the original charging current value is the output current value of the charger before the pre-shutdown instruction is not received;
optionally, the first battery is provided with a charge and discharge switch, and further includes:
the second shutdown instruction sending module is used for sending a second shutdown instruction to the first battery, and the first battery controls the charging and discharging switch to be in a disconnected state after receiving the second shutdown instruction;
and the second output current value adjusting module is used for adjusting the output current value of the charger.
Optionally, the first output current value adjusting module includes:
the charging current value acquisition submodule is used for acquiring the charging current values of all the second batteries before the pre-shutdown instruction is not received;
the total current value calculation submodule is used for calculating the sum of the charging current values of all the second batteries to obtain a total current value;
and the output current value adjusting submodule is used for setting the total current value as the output current value of the charger.
The charging device can execute the charging method provided by any one of the first embodiment and the second embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a charging device according to a fifth embodiment of the present invention, and as shown in fig. 5, the charging device according to the fifth embodiment of the present invention is applied to a battery, and includes:
a pre-shutdown instruction sending module 501, configured to send a pre-shutdown instruction to a charger when a pre-shutdown event is detected, where the charger is configured to obtain an overcurrent protection threshold of a second battery when receiving the pre-shutdown instruction, determine a target charging current value of the charger according to the overcurrent protection threshold, and set the target charging current value as an output current value of the charger, where the second battery is a battery other than the first battery among batteries charged by the charger;
a shutdown instruction sending module 502, configured to send a first shutdown instruction to the charger and shutdown the charger when a shutdown event is detected within a preset time period after the pre-shutdown instruction is sent, where the charger is configured to adjust an output current value of the charger after receiving the first shutdown instruction.
Optionally, the first battery is provided with a key, and the pre-shutdown event is a preset trigger event for the key, or a full charge event of the first battery.
Optionally, the first battery is provided with a charge and discharge switch, and further includes:
and the charge and discharge switch control module is used for controlling the charge and discharge switch to be in a disconnected state when receiving a second shutdown instruction sent by the charger.
An embodiment of the present invention further provides a charger, where the charger includes: one or more processors; a storage device, configured to store one or more programs, and when the one or more programs are executed by the one or more processors, enable the one or more processors to implement the charging method according to the first embodiment or the second embodiment of the present invention.
An embodiment of the present invention further provides a battery, where the battery includes: one or more processors; the storage device is used for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the charging method according to the third embodiment of the present invention.
Embodiments of the present invention further provide a computer-readable storage medium, where instructions, when executed by a processor of a charger or a battery, enable the charger or the battery to perform the charging method according to the above method embodiment.
It should be noted that, as for the device, charger, battery and storage medium embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and in relation to the description, reference may be made to the part of the method embodiments.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a charger and a battery to perform the charging method of the present invention.
It should be noted that, in the charging device, each included unit and each included module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by suitable instruction execution devices. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (14)

1. A charging method applied to a charger for charging a plurality of batteries includes:
when a pre-shutdown instruction sent by a first battery is received, acquiring an overcurrent protection threshold value of a second battery, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
determining a target charging current value of the charger according to the overcurrent protection threshold value;
setting the target charging current value as an output current value of the charger.
2. The charging method according to claim 1, wherein the number of the second batteries is at least two, and the determining the target charging current value of the charger according to the over-current protection threshold value comprises:
determining a minimum over-current protection threshold value from the over-current protection threshold values of the plurality of second batteries;
and determining a target charging current value of the charger according to the minimum overcurrent protection threshold value.
3. The charging method according to claim 2, wherein the determining a target charging current value of the charger according to the minimum over-current protection threshold value comprises:
counting the number of the second batteries;
and calculating the ratio of the minimum overcurrent protection threshold value to the number of the batteries to obtain a target charging current value.
4. The charging method according to claim 1, further comprising, after setting the target charging current value as an output current value of the charger:
judging whether a first shutdown instruction sent by the first battery is received within a preset time length from the receiving of the pre-shutdown instruction;
if so, adjusting the output current value of the charger;
if not, adjusting the output current value of the charger from the target charging current value to an original charging current value, wherein the original charging current value is the output current value of the charger before the pre-shutdown instruction is not received.
5. The charging method according to claim 1, wherein the first battery is provided with a charge-discharge switch, and further comprising, after setting the target charging current value as an output current value of the charger:
sending a second shutdown instruction to the first battery, wherein the first battery controls the charging and discharging switch to be in a disconnected state after receiving the second shutdown instruction;
and adjusting the output current value of the charger.
6. The charging method according to claim 4 or 5, wherein the adjusting the output current value of the charger includes:
acquiring the charging current values of all second batteries before the pre-shutdown instruction is not received;
calculating the sum of the charging current values of all the second batteries to obtain a total current value;
setting the total current value as an output current value of the charger.
7. A charging method, applied to a first battery in charging, comprising:
when a pre-shutdown event is detected, sending a pre-shutdown instruction to a charger, wherein the charger is used for acquiring an overcurrent protection threshold value of a second battery when receiving the pre-shutdown instruction, determining a target charging current value of the charger according to the overcurrent protection threshold value, and setting the target charging current value as an output current value of the charger, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
and within a preset time length after the pre-shutdown instruction is sent, when a shutdown event is detected, sending a first shutdown instruction to the charger and shutting down the charger, wherein the charger is used for adjusting the output current value of the charger after receiving the first shutdown instruction.
8. The charging method according to claim 7, wherein the first battery is provided with a key, and the pre-shutdown event is a preset trigger event for the key or a full charge event of the first battery.
9. The charging method according to claim 1, wherein the first battery is provided with a charge-discharge switch, and after sending a pre-shutdown instruction to the charger, the method further comprises:
and when a second shutdown instruction sent by the charger is received, controlling the charging and discharging switch to be in a disconnected state.
10. A charging device, which is applied to a charger for charging a plurality of batteries, comprising:
the overcurrent protection threshold acquisition module is used for acquiring an overcurrent protection threshold of a second battery when a pre-shutdown instruction sent by a first battery is received, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
the target charging current value determining module is used for determining a target charging current value of the charger according to the overcurrent protection threshold value;
and the output current value setting module is used for setting the target charging current value as the output current value of the charger.
11. A charging device, for use with a first battery in charging, comprising:
the pre-shutdown device comprises a pre-shutdown instruction sending module, a charger and a control module, wherein the pre-shutdown instruction sending module is used for sending a pre-shutdown instruction to the charger when a pre-shutdown event is detected, the charger is used for obtaining an overcurrent protection threshold value of a second battery when receiving the pre-shutdown instruction, determining a target charging current value of the charger according to the overcurrent protection threshold value, and setting the target charging current value as an output current value of the charger, wherein the second battery is a battery other than the first battery in the batteries charged by the charger;
and the shutdown instruction sending module is used for sending a first shutdown instruction to the charger and shutting down the charger when a shutdown event is detected within a preset time length after the pre-shutdown instruction is sent, and the charger is used for adjusting the output current value of the charger after receiving the first shutdown instruction.
12. A charger, characterized in that the charger comprises:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the charging method of any one of claims 1-6.
13. A battery, wherein the charger comprises:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the charging method of any one of claims 7-9.
14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the charging method according to any one of claims 1 to 9.
CN202111538228.2A 2021-12-15 2021-12-15 Charging method, charging device, charger, battery and storage medium Pending CN114221413A (en)

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