WO2021083149A1 - Procédé de charge, et système de charge - Google Patents

Procédé de charge, et système de charge Download PDF

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Publication number
WO2021083149A1
WO2021083149A1 PCT/CN2020/124051 CN2020124051W WO2021083149A1 WO 2021083149 A1 WO2021083149 A1 WO 2021083149A1 CN 2020124051 W CN2020124051 W CN 2020124051W WO 2021083149 A1 WO2021083149 A1 WO 2021083149A1
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WO
WIPO (PCT)
Prior art keywords
battery
charging
difference
control module
charge
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Application number
PCT/CN2020/124051
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English (en)
Chinese (zh)
Inventor
秦威
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深圳市道通智能航空技术股份有限公司
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Publication of WO2021083149A1 publication Critical patent/WO2021083149A1/fr

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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
    • H01M10/441—Methods for charging or discharging for several batteries or cells 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
    • H01M10/446—Initial charging measures
    • 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
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

Definitions

  • the invention relates to the field of battery charging, in particular to a charging method and a charging system.
  • the power consumption of the battery also increases with the functions of the electronic products.
  • the battery life of consumer drones is generally short.
  • users generally buy multiple batteries.
  • the charging operation is troublesome and the charging time is long.
  • the main purpose of the present invention is to provide a charging method and a charging system, aiming to solve the existing technical problem of long charging time for multiple batteries.
  • the present invention provides a charging method, the charging method includes:
  • the battery cells are simultaneously charged in parallel.
  • the charging method further includes:
  • the battery information further includes battery temperature and battery state, and before the calculation of the difference of the charge parameters between the battery cells, the charging method further includes:
  • the difference in the charge parameters between the battery cells is calculated.
  • the method further includes:
  • the charging parameter includes power information
  • the method further includes:
  • the present application also provides a charging system for charging parallel battery packs, the charging system including a charging power source, a control module, and a charging switch with the same number of battery cells in the parallel battery pack;
  • the control module is respectively electrically connected to the plurality of battery cells, and is used to obtain battery information of each battery cell of the plurality of battery cells, where the battery information includes a charge parameter;
  • the control module is also used to calculate the difference of the charge parameters between the battery cells;
  • the control module is also electrically connected to the charging switch, and the charging power source is electrically connected to each battery unit through a charging switch.
  • the control module It is used to control the charging switch connected with each charging unit to turn on, so as to charge the battery units simultaneously and in parallel.
  • control module is further configured to control to turn on the charging switch connected to the battery cell with the low charge parameter of the two battery cells corresponding to the difference, so as to Charging the battery cell with the low charge parameter of the two battery cells corresponding to the difference, so that the difference is smaller than a preset difference threshold.
  • the battery information further includes battery temperature and battery status,
  • the control module is also used to determine whether the battery temperature is less than a preset temperature range threshold and determine whether the battery status is normal;
  • control module calculates the difference of the charge parameters between the battery cells.
  • control module when the control module obtains the battery information of the new battery unit, the control module is further configured to calculate the difference of the charge parameters between the battery units again.
  • the charging parameter includes power information
  • the method further includes:
  • control module controls the charging switch connected to the disconnected and fully charged battery unit to stop charging the fully charged battery unit.
  • the technical solution of the present invention obtains battery information of each battery cell in a parallel battery pack, where the battery information includes a charge parameter; and calculates the difference of the charge parameter between the battery cells When the difference is less than the preset difference threshold, the battery cells are simultaneously charged in parallel, so that the charging power supply can charge the battery cells with maximum power, which can shorten the total charging time to the greatest extent and improve the charging effectiveness.
  • FIG. 1 is a schematic diagram of a module structure for electrically connecting a charging system and parallel battery packs according to a first embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a charging method provided by a second embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a charging method provided by a third embodiment of the present invention.
  • the first embodiment of the present application provides a charging system 10 for charging parallel battery packs 20.
  • the charging system 10 includes a charging power source 11, a control module 12 and a charging switch 13 with the same number of battery cells in the parallel battery pack 20.
  • the parallel battery pack 20 includes a plurality of battery units.
  • the charging power source 11 is electrically connected to each battery unit through a charging switch 13, and the control module 12 is electrically connected to each battery unit.
  • the control module 12 is also connected to the charging switch 13 respectively. Electrical connection.
  • the control module 12 is configured to obtain battery information of each battery cell in the plurality of battery cells, where the battery information includes a charge parameter; the control module 12 is also configured to calculate a difference in charge parameter between the battery cells When the difference is less than the preset difference threshold, the control module 12 is used to control the charging switch 13 connected to each charging unit to turn on, so as to simultaneously charge the battery units in parallel.
  • the number of battery cells included in the parallel battery pack 20 is not limited. In the present application, the number of battery cells is at least two. It can be understood that the number of battery cells included in the parallel battery pack 20 can also be changed. For example, when two battery cells are charged at the beginning, a new battery cell is charged during the charging process, that is, the parallel battery pack increases by one. For the new battery unit, the parallel battery pack 20 includes 3 battery units. It can be understood that the charging system 10 may include a battery holder, and the battery holder is used to install battery units. When the battery cells are installed in the battery holder, the battery cells are connected in parallel. Each time a battery unit is installed in the battery holder, the number of battery units of the battery pack 20 in parallel increases by one.
  • the battery unit is a battery unit capable of data communication.
  • the battery unit is a data communication battery.
  • the battery unit may include one or more battery cells. When there are multiple battery cells, the parallel or series connection of the battery cells is not limited in this application.
  • the battery unit includes battery unit A, battery unit B, and battery unit C.
  • the charging switch 13 is a switch type element, and the charging switch 13 can be controlled by the control module 12 to realize the on-off of the control circuit.
  • the charging switch 13 may be a relay. It can be understood that the charging switch 13 may also be other types of switches that can be controlled, which is not limited in this application.
  • the number of charging switches 13 is the same as the number of battery cells.
  • Each charging switch 13 is electrically connected to a battery unit. When the charging switch 13 is closed, the battery unit electrically connected to the charging switch 13 is charged.
  • the charging switch 13 includes a charging switch A, a charging switch B, and a charging switch C.
  • the charging switch A is electrically connected to the battery unit A
  • the charging switch B is electrically connected to the battery unit B
  • the charging switch is electrically connected to the C battery unit C.
  • the charging power source 11 may be a power source capable of storing energy by itself, or a power adapter to convert the commercial power into a suitable voltage or current. It should be noted that the charging power supply 11 is a charging power supply 11 with a constant current function and a constant voltage function.
  • the charging power source 11 is electrically connected to each charging switch 13 respectively, and the charging power source 11 is electrically connected to a battery unit through a charging switch 13 respectively. Specifically, the charging power source 11 is electrically connected to the battery unit A through the charging switch A, the charging power source 11 is electrically connected to the battery unit B through the charging switch B, and the charging power source 11 is electrically connected to the battery unit C through the charging switch C.
  • the charging switch A When the charging switch A is closed, the charging power supply 11 charges the battery unit A, the charging switch B is closed, the charging power supply 11 charges the battery unit B, and the charging switch C is closed, the charging power supply 11 charges the battery unit C.
  • the charging switch A, the charging switch B, and the charging switch C are all closed, and each battery unit, that is, the battery unit A, the battery unit B, and the battery unit C are simultaneously charged in parallel.
  • the control module 12 can be an independent module, or can be integrated with the charging power supply 11 and the charging switch 13.
  • the control module 12 may have its own device for storing electric energy, or it may be powered by the charging power supply 11 for operation.
  • the communication method between the control module 12 and the battery unit is not limited.
  • the control module 12 obtains battery information of each battery unit in the plurality of battery units.
  • the battery information includes charging parameters, and the battery information may also include battery temperature and battery status.
  • the charge parameter is the battery power state measured according to the battery voltage, internal resistance and other parameters, that is, the charge parameter includes power information.
  • the battery temperature is the temperature of the battery cell.
  • the battery state is the state the battery cell is in.
  • the battery state includes a normal state and an abnormal state, and the abnormal state includes short circuit, overvoltage, and undervoltage.
  • the control module 12 calculates the difference of the charge parameters between the battery cells. If the charge parameter is the electric quantity, the difference between the electric quantity of each battery unit is calculated. If battery cell A has a power of 3.9, battery cell B has a power of 4, and battery cell C has a power of 4.2, then the power difference between battery cell A and battery cell B is 0.1, and the difference between battery cell A and battery cell C The difference in power between battery cells is 0.3, and the difference in power between battery cell B and battery cell C is 0.2. In this application, the value of the power is only an example, and does not limit the specific value of the power of the battery unit.
  • the control module 12 When the difference is less than a preset difference threshold, the control module 12 is used to control the charging switch 13 connected to each charging unit to turn on, so as to charge the battery units simultaneously and in parallel.
  • the size of the difference threshold is not limited, and can be set according to needs, such as setting the difference threshold according to the characteristics of the battery unit. If the difference threshold value is 0.5, and the power difference of each battery cell is less than the difference threshold value 0.5, the control module 12 controls the charging switch A, the charging switch B and the charging switch C to turn on, so that the battery cell A, the battery cell B and the battery cell are turned on. C is charged in parallel at the same time.
  • the control module 12 controls the charging switch 13 connected to the battery unit that is disconnected and fully charged to stop charging the fully charged battery unit Recharge. If the battery cell C has the most power and the battery cell C is fully charged first, the charging switch C electrically connected to the battery cell C is disconnected to stop charging the battery cell C.
  • the control module 12 is further configured to control to turn on the charging switch 13 connected to the battery cell with the low charge parameter of the two battery cells corresponding to the difference. , To charge the battery cell with the low charge parameter of the two battery cells corresponding to the difference, so that the difference is smaller than a preset difference threshold. If battery cell A has a power of 3, battery cell B has a power of 4, and battery cell C has a power of 4.2, then the power difference between battery cell A and battery cell B is 1, and the difference between battery cell A and battery cell C The power difference between the two is 1.2, and the power difference between the battery cell B and the battery cell C is 0.2.
  • the power difference between battery cell A and battery cell B, the difference between battery cell A and battery cell C, 1.2 is greater than the difference threshold 0.5, then the control module 12 controls to open the two corresponding to the difference 1
  • the charging switch A connected to the battery cell A with the low charge parameter in the battery unit the control module 12 controls to turn on the charging switch A connected to the battery cell A with the low charge parameter of the two battery cells corresponding to the difference of 1.2, that is, only Turn on the charging switch A to charge the battery unit A.
  • the control module 12 is used to control the charging switch 13 connected to each charging unit to turn on, so as to simultaneously charge the battery units in parallel.
  • the control module 12 is also used to determine whether the battery temperature is less than a preset temperature range threshold and determine whether the battery status is normal; when the temperature is within the temperature range threshold and the battery status is normal, The control module 12 calculates the difference of the charge parameters between the battery cells.
  • the temperature range threshold is the temperature range within which the battery cell can work normally. The specific range of the temperature range threshold is not limited, and can be set according to the type of battery cell. If the battery cell includes a lithium-ion battery cell, the temperature range threshold can be set to 0°C-45°C.
  • the battery state includes normal state and abnormal state, and abnormal state includes short circuit, overvoltage and undervoltage. . When the temperature exceeds the temperature range threshold, or the battery status is abnormal, the reacquisition control module 12 obtains battery information of each battery unit of the plurality of battery units.
  • control module 12 When the control module 12 obtains the battery information of the new battery unit, the control module 12 is also used to calculate the difference of the charge parameters between the battery units again. That is, the number of battery cells in the battery pack increases, and the difference in the charge parameters between the battery cells is recalculated, so that when the difference is less than the preset difference threshold, the battery cells Charge in parallel at the same time.
  • a second embodiment of the present application provides a charging method, which adopts the above-mentioned charging system to charge parallel battery packs, and the charging method includes:
  • S11 Obtain battery information of each battery unit in the parallel battery pack, where the battery information includes a charge parameter.
  • the charge parameter is the battery power state measured according to the battery voltage, internal resistance and other parameters, that is, the charge parameter includes power information.
  • the battery temperature is the temperature of the battery cell.
  • the battery state is the state the battery cell is in.
  • the battery state includes a normal state and an abnormal state, and the abnormal state includes short circuit, overvoltage, and undervoltage.
  • the difference between the electric quantity of each battery unit is calculated. If battery cell A has a power of 3.9, battery cell B has a power of 4, and battery cell C has a power of 4.2, then the power difference between battery cell A and battery cell B is 0.1, and the difference between battery cell A and battery cell C The difference in power between battery cells is 0.3, and the difference in power between battery cell B and battery cell C is 0.2.
  • the value of the power is only an example, and does not limit the specific value of the power of the battery unit.
  • the size of the difference threshold is not limited, and can be set according to needs, such as setting the difference threshold according to the characteristics of the battery unit. If the difference threshold value is 0.5, and the power difference of each battery cell is less than the difference threshold value 0.5, the control module controls the charging switch A, the charging switch B and the charging switch C to turn on, so as to give the battery unit A, battery unit B, and battery unit C open. Charge in parallel at the same time.
  • the charging method further includes:
  • the charging switch C electrically connected to the battery cell C is disconnected to stop charging the battery cell C.
  • the charging method further includes:
  • battery cell A has a power of 3
  • battery cell B has a power of 4
  • battery cell C has a power of 4.2
  • the power difference between battery cell A and battery cell B is 1, and the difference between battery cell A and battery cell C
  • the power difference between the two is 1.2
  • the power difference between the battery cell B and the battery cell C is 0.2.
  • the charge switch A connected to the battery cell A with the low charge parameter in the unit the control module controls to turn on the charge switch A connected to the battery cell A with the low charge parameter of the two battery cells corresponding to the difference of 1.2, that is, only the charge is turned on Switch A to charge battery cell A.
  • the control module is used to control the charging switch connected to each charging unit to turn on, so as to simultaneously charge the battery units in parallel.
  • the charging method further includes:
  • the number of battery cells in the parallel battery pack increases, and the difference in the charge parameters between the battery cells is recalculated, so that when the difference is less than the preset difference threshold, the battery cells Charge in parallel at the same time.
  • the charging method of the present application will obtain the battery information of each battery cell in the parallel battery pack in real time to perform the subsequent steps, that is, the method of the present application will be performed in real time.
  • the charging method provided by the present application obtains battery information of each battery cell in a parallel battery pack, where the battery information includes a charge parameter; calculates the difference between the charge parameters of the battery cells; When it is less than the preset difference threshold, the battery cells are simultaneously charged in parallel, so that the charging power source can charge the battery cells with maximum power, which can shorten the total charging time to the greatest extent and improve the charging efficiency.
  • the third embodiment of the present application also provides a charging method. Based on the foregoing embodiments, this embodiment provides a safe charging solution.
  • the charging method includes:
  • S21 Obtain battery information of each battery cell in a parallel battery pack, where the battery information includes a charge parameter.
  • the battery information also includes battery temperature and battery status.
  • S22 Determine whether the battery temperature is less than a preset temperature range threshold and determine whether the battery status is normal.
  • the battery information also includes battery temperature and battery status.
  • the temperature range threshold is the temperature range within which the battery cell can work normally. The specific range of the temperature range threshold is not limited, and can be set according to the type of battery cell. If the battery cell includes a lithium-ion battery cell, the temperature range threshold can be set to 0°C-45°C.
  • the battery state includes normal state and abnormal state, and abnormal state includes short circuit, overvoltage and undervoltage. .
  • step S23 is executed.
  • the reacquisition control module obtains battery information of each battery unit of the plurality of battery units.
  • the charging method provided by the present application obtains battery information of each battery cell in a parallel battery pack, the battery information includes charging parameters; determines whether the battery temperature is less than a preset temperature range threshold and determines whether the battery status is normal When the temperature is within the temperature range threshold and the battery status is normal, calculate the difference in charge parameters between the battery cells; when the difference is less than a preset difference threshold , Charging the battery cells in parallel at the same time can make the battery return to a normal temperature range and work in a normal state, improve the safety of charging, and ensure the speed of charging.
  • sequence numbers of the above-mentioned embodiments of the present invention are only for description, and do not represent the superiority or inferiority of the embodiments.
  • the terms “include”, “include” or any other variants thereof in this article are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements not only includes those elements, but also includes those elements that are not explicitly included.
  • the other elements listed may also include elements inherent to the process, device, article, or method. If there are no more restrictions, the element defined by the sentence "including one" does not exclude the existence of other identical elements in the process, device, article, or method that includes the element.

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

Abstract

La présente invention concerne un procédé de charge, et un système de charge. Le procédé de charge comprend : l'acquisition d'informations de batterie de chaque unité de batterie dans des blocs batterie parallèles, les informations de batterie comprenant des paramètres de charge (S11) ; le calcul de la différence des paramètres de charge entre les blocs batterie (S12) ; et, lorsque la différence est inférieure à un seuil de différence prédéfini, la charge simultanée des unités de batterie en même temps (S13). Le procédé décrit permet à une alimentation électrique de charge de charger des unités de batterie à une puissance maximum, ce qui peut raccourcir le temps de charge total dans la plus grande mesure et augmente le rendement de charge.
PCT/CN2020/124051 2019-11-01 2020-10-27 Procédé de charge, et système de charge WO2021083149A1 (fr)

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CN201911060999.8 2019-11-01
CN201911060999.8A CN111063950A (zh) 2019-11-01 2019-11-01 充电方法和充电系统

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CN111063950A (zh) * 2019-11-01 2020-04-24 深圳市道通智能航空技术有限公司 充电方法和充电系统
CN112786983A (zh) * 2021-01-29 2021-05-11 深圳市道通智能航空技术股份有限公司 一种充电方法、充电器及充电系统
CN113682481B (zh) * 2021-08-03 2023-06-30 深圳市道通智能航空技术股份有限公司 一种电池管理方法、装置及无人机

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