CN113517733A - Charging control device, charging control method and aircraft - Google Patents

Charging control device, charging control method and aircraft Download PDF

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Publication number
CN113517733A
CN113517733A CN202110494973.5A CN202110494973A CN113517733A CN 113517733 A CN113517733 A CN 113517733A CN 202110494973 A CN202110494973 A CN 202110494973A CN 113517733 A CN113517733 A CN 113517733A
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China
Prior art keywords
battery
voltage
charging
batteries
charge
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Pending
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CN202110494973.5A
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Chinese (zh)
Inventor
赵德力
全洪飞
李�杰
伍惠康
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Guangdong Huitian Aerospace Technology Co Ltd
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Guangdong Huitian Aerospace Technology Co Ltd
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Priority to CN202110494973.5A priority Critical patent/CN113517733A/en
Publication of CN113517733A publication Critical patent/CN113517733A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/10—Air crafts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses charging control device, including charging circuit and group battery control management unit. The charging circuit is used for transmitting the charging voltage provided by the charging seat to the plurality of batteries of the battery pack respectively. The battery pack management unit is used for controlling the charging seat to provide a first charging voltage to charge the first battery so as to charge the first battery to a first regulation voltage when the first battery voltage of the first battery is less than the second battery voltage of the second battery. The battery pack management unit is also used for controlling the charging seat to provide a second charging voltage to charge the first battery and the second battery when the first battery is charged to the first regulating voltage so as to charge the first battery and the second battery to the target battery voltage. In the charge control device disclosed by the application, a small charging current can be kept, so that the heat productivity of the battery is controlled, and the service life of the battery is prolonged. The application also discloses a charging control method and an aircraft.

Description

Charging control device, charging control method and aircraft
Technical Field
The application relates to the technical field of battery charging, in particular to a charging control device, a charging control method and an aircraft.
Background
The existing battery pack is charged by directly connecting a plurality of batteries in the battery pack to a copper bar bus interface and then connecting a direct current quick charging socket with a charging device to charge the battery pack. The above-mentioned way of charging a plurality of batteries simultaneously, under the condition that some batteries consume more, can appear consuming battery charging current too big, lead to the phenomenon that the battery generates heat seriously, battery life is short. If no relay switch is arranged between the copper bar bus interface and the battery, even the charging and discharging phenomena between the batteries can occur.
Disclosure of Invention
In view of this, an embodiment of the present application provides a charge control device, including:
the charging circuit is connected with the battery pack and the charging seat so as to transmit the charging voltage provided by the charging seat to the plurality of batteries of the battery pack respectively;
the battery pack control management unit is used for controlling the charging seat to provide a first charging voltage to charge the first battery so as to charge the first battery to a first regulation voltage when the first battery voltage of the first battery is smaller than the second battery voltage of the second battery, the difference value between the second battery voltage and the first regulation voltage is smaller than a first voltage threshold value, and the first charging voltage is not smaller than the first regulation voltage; and
the battery pack control management unit is further used for controlling the charging seat to provide a second charging voltage to charge the first battery and the second battery when the first battery is charged to the first regulation voltage so as to charge the first battery and the second battery to a target battery voltage, wherein the target battery voltage is greater than the second battery voltage and the first regulation voltage, and the second charging voltage is not less than the target battery voltage.
In some embodiments, the first battery voltage is a minimum battery voltage of the plurality of batteries, and the second battery voltage is a battery voltage of the plurality of batteries that has a minimum difference from the first battery voltage.
In some embodiments, the target battery voltage is determined from battery voltages of a plurality of the batteries or from saturated battery voltages of a plurality of the batteries.
In certain embodiments, the number of first batteries is one or more.
In some embodiments, the charging circuit includes a copper bar bus interface and a plurality of relays, the plurality of relays correspond to the plurality of batteries, the copper bar bus interface is connected to the plurality of batteries through the plurality of relays, respectively, the battery pack control and management unit includes a multi-channel fet driving subunit, and the multi-channel fet driving subunit is configured to control the on/off of the relays to provide charging voltage to the corresponding batteries.
In some embodiments, the battery pack includes a weak current supply battery for supplying power to the battery pack control and management unit.
In some embodiments, the charging circuit includes a voltage conversion module, the voltage conversion module is connected to the weak current power supply battery and the corresponding relay, and the voltage conversion module is configured to convert the charging voltage provided by the charging dock into a weak current charging voltage for charging the weak current power supply battery.
The embodiment of the application provides a charging control method, which comprises the following steps:
detecting the cell voltage of each cell in the cell group;
when a first battery voltage of a first battery is smaller than a second battery voltage of a second battery, providing a first charging voltage to charge the first battery so as to charge the first battery to a first regulation voltage, wherein the difference value between the second battery voltage and the first regulation voltage is smaller than a first voltage threshold value, and the first charging voltage is not smaller than the first regulation voltage; and
when the first battery is charged to the first regulation voltage, a second charging voltage is provided to charge the first battery and the second battery so as to charge the first battery and the second battery to a target battery voltage, wherein the target battery voltage is greater than the second battery voltage and the first regulation voltage, and the second charging voltage is not less than the target battery voltage.
In some embodiments, the charge control method includes:
the detecting the cell voltage of each of the cells in the cell group includes:
sorting the cell voltages of a plurality of said cells;
determining the battery with the minimum battery voltage in a plurality of batteries as a first battery, wherein the battery voltage of the first battery is a first battery voltage;
and determining the battery with the minimum difference value between the battery voltage and the first battery voltage in the plurality of batteries as a second battery, wherein the battery voltage of the second battery is the second battery voltage.
The embodiment of the application provides an aircraft, which comprises a battery pack and the charging control device in any one of the above embodiments.
In the charge control device, the charge control method and the aircraft of the embodiment of the application, the battery voltage of each battery in the battery pack is detected through the battery pack control management unit, the charging seat is controlled to provide the first charging voltage to charge the first battery, so that the first battery is charged to the first adjusting voltage, the charging seat is controlled to provide the second charging voltage to charge the first battery and the second battery, so that the first battery and the second battery are charged to the target battery voltage, the smaller charging current can be kept, the heat productivity of the batteries is controlled, and the service life of the batteries is prolonged.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block diagram of a charge control device according to an embodiment of the present application.
Fig. 2 is a flowchart illustrating a charging control method according to an embodiment of the present application.
Fig. 3 is a flowchart illustrating a charging control method according to an embodiment of the present application.
Fig. 4 is a flowchart illustrating a charging control method according to an embodiment of the present application.
Description of the main element symbols:
the charging control system 1 comprises a charging control device 10, a charging circuit 110, a battery pack control management unit 120, a copper bar bus interface 130, a copper bar bus anode 1301, a copper bar bus cathode 1302, a voltage conversion module 140, a battery pack 20, a first battery 210, a second battery 220, a weak current power supply battery 230 and a charging stand 30.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
Referring to fig. 1, the present embodiment provides a charging control device 10, and the charging control device 10 includes a charging circuit 110 and a battery pack control management unit 120. The charging circuit 110 connects the battery pack 20 and the cradle 30 to transmit the charging voltage provided by the cradle 30 to the plurality of batteries of the battery pack 20, respectively. The battery pack 20 management unit is connected to the charging circuit 110, the battery pack 20 and the charging dock 30, the battery pack control management unit 120 is configured to detect battery voltages of the batteries in the battery pack 20, and the battery pack control management unit 120 is configured to control the charging dock 30 to provide a first charging voltage to charge the first battery 210 when a first battery voltage of the first battery 210 is less than a second battery voltage of the second battery 220, so as to charge the first battery 210 to a first regulated voltage. The difference value between the second battery voltage and the first regulating voltage is smaller than a first voltage threshold value, and the first charging voltage is not smaller than the first regulating voltage. The battery pack control and management unit 120 is further configured to control the cradle 30 to provide a second charging voltage to charge the first battery 210 and the second battery 220 when the first battery 210 is charged to the first regulated voltage so as to charge the first battery 210 and the second battery 220 to the target battery voltage. The target battery voltage is greater than the second battery voltage and the first regulation voltage, and the second charging voltage is not less than the target battery voltage.
Specifically, in the related art, a dc fast charging socket is often used to connect a charging device to charge the battery pack 20. However, since the battery pack 20 includes a plurality of batteries, and the power consumption of the plurality of batteries is different, when the battery with a large power consumption is charged, the difference between the battery voltage and the charging voltage is large, so that the charging current is large, and the battery with a large power consumption generates heat seriously. Long term this results in a reduced battery life.
In the charge control device 10 according to the embodiment of the present application, the battery pack control management unit 120 detects the battery voltages of the respective batteries in the battery pack 20, and controls the charging dock 30 to provide the first charging voltage to charge the first battery 210, so that the first battery 210 is charged to the first adjustment voltage, and controls the charging dock 30 to provide the second charging voltage to charge the first battery 210 and the second battery 220, so that the first battery 210 and the second battery 220 are charged to the target battery voltage, and thus the charging current can be kept small, the heat generation amount of the batteries can be controlled, and the service life of the batteries can be prolonged.
Further, the first battery voltage may be a battery voltage of the first battery 210, that is, a voltage of the first battery 210 when charging. The second battery voltage is the same. When the first battery voltage is lower than the second battery voltage, the battery pack control and management unit 120 is connected to the charging dock 30 through the CAN bus, and controls the charging dock 30 to provide the first charging voltage to charge the first battery 210, so that the first battery voltage is raised to the first regulation voltage.
When the first battery voltage rises to the first regulation voltage, the battery pack control management unit 120 controls the cradle 30 to supply the second charging voltage to charge the first battery 210 and the second battery 220 so that the first battery voltage and the second battery voltage rise to the target battery voltage.
In this manner, the charging of the first battery 210 and the second battery 220 by the charging control device 10 is completed. Under the condition of ensuring that the charging of the first battery 210 and the second battery 220 is finished, the charging current in the batteries can be kept small, so that the heat generation amount of the batteries is controlled, and the service life of the batteries is prolonged.
The first charging voltage is not less than the first regulation voltage, and the difference between the second battery voltage and the first regulation voltage is less than the first voltage threshold. The target battery voltage is greater than the second battery voltage and the first regulation voltage, and the second charging voltage is not less than the target battery voltage. The first voltage threshold may be set according to factors such as performance of the charge control device 10, battery performance, and usage scenario of the charge control device 10, and is not particularly limited, and may be, for example, 1V, 3V, 5V, 8V, 10V, 0.5V, and the like.
In some embodiments, when the first battery voltage is 80V, the second battery voltage is 90V, the first charging voltage is 92V, the first regulation voltage is 89V, the second charging voltage is 100V, and the target battery voltage is 100V.
When the first battery voltage 80V is less than the second battery voltage 90V, the battery pack control and management unit 120 controls the charging cradle 30 to charge the first battery 210 to provide the first charging voltage 92V, so that the first battery voltage is raised from 80V to the first regulated voltage 89V.
When the first battery voltage rises to the first regulation voltage 89V, the battery pack control management unit 120 controls the charging cradle 30 to supply the second charging voltage 100V to the first battery 210 and the second battery 220 for charging so that the first battery voltage and the second battery voltage rise to the target battery voltage 100V.
In this manner, the charging of the first battery 210 and the second battery 220 by the charging control device 10 is completed. Under the condition of ensuring that the charging of the first battery 210 and the second battery 220 is finished, the charging current in the batteries can be kept small, so that the heat generation amount of the batteries is controlled, and the service life of the batteries is prolonged.
In some embodiments, the first battery voltage is a minimum battery voltage of the plurality of batteries, and the second battery voltage is a battery voltage of the plurality of batteries that has a minimum difference from the first battery voltage.
In some embodiments, the number of first batteries 210 is one or more.
Specifically, while detecting the cell voltages of the respective cells in the battery pack 20, the battery pack control management unit 120 may also be configured to determine the first cell 210 having the smallest cell voltage among the plurality of cells, at which the second cell voltage of the second cell 220 is greater than the first cell voltage of the first cell 210. In addition, in the case where two or more batteries in the battery pack 20 are the same as the minimum voltage of the plurality of batteries, the battery pack control and management unit 120 controls the charging dock 30 to provide the first charging voltage to charge the first battery 210, so that the first battery voltage is raised to the first regulation voltage, considering the battery with the minimum voltage as the first battery 210.
When the first battery voltage rises to the first regulation voltage, the battery pack control management unit 120 controls the cradle 30 to supply the second charging voltage to charge the first battery 210 and the second battery 220 so that the first battery voltage and the second battery voltage rise to the target battery voltage.
In some embodiments, the battery pack 20 includes 2 batteries each having a voltage of 80V and 1 battery having a voltage of 90V, and the 2 batteries having a voltage of 80V are regarded as the first battery 210, and the battery having a voltage of 90V is regarded as the second battery 220. That is, the first battery voltage is 80V, and the second battery voltage is 90V. The first charging voltage is provided to be 92V, the first regulation voltage is 89V, the second charging voltage is 100V, and the target battery voltage is 100V.
When the first battery voltage 80V is less than the second battery voltage 90V, the battery pack control and management unit 120 controls the charging cradle 30 to charge the first battery 210 to provide the first charging voltage 92V, so that the first battery voltage is raised from 80V to the first regulated voltage 89V.
When the first battery voltage rises to the first regulation voltage 89V, the battery pack control management unit 120 controls the charging cradle 30 to supply the second charging voltage 100V to the first battery 210 and the second battery 220 for charging so that the first battery voltage and the second battery voltage rise to the target battery voltage 100V.
In this manner, the charging of the first battery 210 and the second battery 220 by the charging control device 10 is completed. Under the condition of ensuring that the charging of the first battery 210 and the second battery 220 is finished, the charging current in the batteries can be kept small, so that the heat generation amount of the batteries is controlled, and the service life of the batteries is prolonged.
It is understood that the number of the second batteries 220 may be one or more. The embodiment is similar to the first battery 210, and is not described herein again.
In some embodiments, the target battery voltage is determined from battery voltages of the plurality of batteries or from saturated battery voltages of the plurality of batteries.
Specifically, in some embodiments, the target battery voltage may be determined from battery voltages of a plurality of batteries. When the battery pack 20 includes 2 batteries each having a voltage of 80V, 2 batteries having a voltage of 90V, and 2 batteries having a voltage of 100V, the 2 batteries having a voltage of 80V are regarded as the first batteries 210 and the 2 batteries having a voltage of 90V are regarded as the second batteries 220 when the minimum battery voltage in the battery pack 20 is 80V (hereinafter, referred to as a first charging stage). When the minimum cell voltage in the battery pack 20 is 90V (hereinafter, referred to as a second charging stage), 4 cells having a voltage of 90V are regarded as the first cells 210, and 2 cells having a voltage of 100V are regarded as the second cells 220.
In the first charging stage, the first battery voltage is 80V, the second battery voltage is 90V, and the target battery voltage is determined to be 100V according to the second battery voltage. In the second charging stage, the first battery voltage is 90V, the second battery voltage is 100V, and the target battery voltage is determined to be 110V according to the second battery voltage.
In other embodiments, the target battery voltage may be determined based on the saturated battery voltages of the plurality of batteries. The battery pack 20 includes 2 batteries each having a voltage of 80V, 2 batteries each having a voltage of 90V, and 2 batteries each having a voltage of 100V, and the saturation voltage of the batteries is 120V. When the minimum cell voltage in the battery pack 20 is 80V, 2 cells with a voltage of 80V are regarded as the first cells 210, and 2 cells with a voltage of 90V are regarded as the second cells 220. When the minimum cell voltage in the battery pack 20 is 90V, 4 cells having a voltage of 90V are regarded as the first cells 210, and 2 cells having a voltage of 100V are regarded as the second cells 220.
In the first charging stage, the first battery voltage is 80V, the second battery voltage is 90V, and the target battery voltage is determined to be 100V according to the second battery voltage. In the second charging stage, the first battery voltage is 90V, the second battery voltage is 100V, and the target battery voltage is 120V according to the saturation voltages of the plurality of batteries.
In this way, when the first battery 210 and the second battery 220 are charged, the charging current can be kept small in the batteries, so that the heat generation amount of the batteries can be controlled, and the service life of the batteries can be prolonged.
In some embodiments, the battery control and management unit 120 is configured to control the cradle 30 to provide a third charging voltage to power the plurality of batteries to charge the plurality of batteries to a second regulation voltage when the battery voltages of the plurality of batteries are equal and the difference between the saturated battery voltage and the battery voltages of the plurality of batteries is greater than a second voltage threshold, the third charging voltage being not less than the second regulation voltage.
Specifically, the second voltage threshold may be set according to the performance of the charge control device 10, the performance of the battery, the usage scenario of the charge control device 10, and the like, and may be, for example, 8V, 10V, 15V, 20V, and the like, without limitation.
Under the condition that the battery voltages of the plurality of batteries are equal and the difference value between the saturated battery voltage and the battery voltages of the plurality of batteries is greater than the second voltage threshold, the saturated battery voltage is directly taken as the target battery voltage due to the large difference value between the saturated battery voltage and the battery voltages of the plurality of batteries, so that the battery charging current is possibly too large, and the batteries generate heat. Accordingly, the battery pack control management unit 120 controls the cradle 30 to supply the third charging voltage to the plurality of batteries to charge the plurality of batteries to the second regulation voltage.
In this way, when the battery voltages of the plurality of batteries are equal and the difference between the saturated battery voltage and the battery voltages of the plurality of batteries is greater than the second voltage threshold, the charging current can be kept small, so that the heat generation amount of the batteries is controlled, and the service life of the batteries is prolonged.
In some embodiments, the charging circuit 110 includes a copper bar bus interface 130 and a plurality of relays corresponding to the plurality of batteries, the copper bar bus interface 130 is connected to the plurality of batteries through the plurality of relays, respectively, and the battery pack control and management unit 120 includes a multi-channel fet driving subunit for controlling the on/off of the relays to provide the charging voltage to the corresponding batteries.
Specifically, the charging circuit 110 includes a copper bar bus interface 130 and a plurality of relays, the plurality of relays correspond to the plurality of batteries, the copper bar bus anode 1301 is connected to the plurality of batteries through the plurality of relays, and the copper bar bus cathode 1302 is directly connected to the batteries to form a charging loop. When the relay is closed, the battery connected to the relay starts charging. When the relay is disconnected, the battery connected to the relay stops charging. Wherein, the on or off of the relay is controlled by the multi-way field effect transistor driving subunit.
In this way, it is possible to realize control of whether or not to charge the battery.
In some embodiments, the battery pack 20 includes a weak current supply battery 230, and the weak current supply battery 230 is used to supply power to the battery pack control management unit 120.
Specifically, the weak current supply battery 230 is charged in the same manner as the other batteries in the battery pack 20, but in terms of the discharging manner, the weak current supply battery 230 is mainly used for supplying power to the battery pack control management unit 120, and the other batteries in the battery pack 20 may be used for supplying power to a device such as a vehicle, an aircraft, and an electronic device, which uses a large amount of power or requires a high voltage. The battery pack control and management unit 120 is connected to the weak current power supply battery 230 through a CAN bus, and communicates with the weak current power supply battery 230.
The weak current power supply battery 230 is used for supplying power to the battery pack control management unit 120, so that the normal operation of the charging control device 10 can be ensured, the safe charging of the battery pack 20 is realized, the heat productivity of the battery is controlled, and the service life of the battery is prolonged.
In some embodiments, the charging circuit 110 includes a voltage conversion module, which is connected to the weak current power supply battery 230 and a corresponding relay, and is used for converting the charging voltage provided by the cradle 30 into a weak current charging voltage charged by the weak current power supply battery 230.
Specifically, the voltage conversion module is connected to the weak current power supply battery 230, and converts the charging voltage provided by the charging dock 30 into the weak current charging voltage charged by the weak current power supply battery 230, so as to ensure the charging safety of the weak current power supply battery 230, control the heat value of the battery, and prolong the service life of the battery.
The voltage conversion module is also connected with a relay corresponding to the weak current power supply battery 230, and the multichannel fet driving subunit supplies the charging voltage to the weak current power supply battery 230 by controlling the on/off of the relay. In this way, it is possible to control whether or not to charge the weak current power supply battery 230.
Referring to fig. 2, an embodiment of the present application further provides a charging control method, including:
s10: detecting the cell voltage of each cell in the cell group 20;
s20: when the first battery voltage of the first battery 210 is less than the second battery voltage of the second battery 220, providing a first charging voltage to charge the first battery 210 so as to charge the first battery 210 to a first regulated voltage;
s30: when the first battery 210 is charged to the first regulation voltage, the second charging voltage is supplied to charge the first battery 210 and the second battery 220 so that the first battery 210 and the second battery 220 are charged to the target battery voltages.
Referring to fig. 3, in some embodiments, S10 includes:
s11: sorting the battery voltages of the plurality of batteries;
s12: determining a battery with the smallest battery voltage among the plurality of batteries as a first battery 210, and the battery voltage of the first battery 210 is a first battery voltage;
s13: the battery with the smallest difference between the battery voltage of the plurality of batteries and the first battery voltage is determined as the second battery 220, and the battery voltage of the second battery 220 is determined as the second battery voltage.
Referring to fig. 4, in some embodiments, the charging control method further includes:
s40: and when the battery voltages of the plurality of batteries are equal and the difference value between the saturated battery voltage and the battery voltages of the plurality of batteries is greater than a second voltage threshold, controlling the charging seat to provide a third charging voltage to supply power to the plurality of batteries so as to charge the plurality of batteries to a second regulation voltage.
The charging control method according to the embodiment of the present application can be realized by the charging control device 10.
For some specific examples of the charging control method according to the embodiment of the present application, reference may be made to the foregoing example of the charging control device 10, and details are not repeated here.
In the charging control method according to the embodiment of the present application, the battery voltages of the batteries in the battery pack 20 are detected, and the charging dock 30 is controlled to provide the first charging voltage to charge the first battery 210, so that the first battery 210 is charged to the first adjustment voltage, and the charging dock 30 is controlled to provide the second charging voltage to charge the first battery 210 and the second battery 220, so that the first battery 210 and the second battery 220 are charged to the target battery voltage, and the charging current can be kept small, thereby controlling the heat generation amount of the batteries and prolonging the service life of the batteries.
Referring to fig. 1 again, the present embodiment further provides a charging control system 1, including:
a charging circuit 110 connected to the battery pack 20 to transmit a charging voltage to a plurality of batteries of the battery pack 20, respectively;
the charging socket 30, the charging socket 30 connects the charging circuit 110 to provide the charging voltage for the charging circuit 110;
the battery management unit 120 is connected to the charging circuit 110, the battery 20 and the charging dock 30, the battery management unit 120 is configured to detect battery voltages of the batteries in the battery 20, and the battery management unit 120 is configured to control the charging dock 30 to provide a first charging voltage to charge the first battery 210 when a first battery voltage of the first battery 210 is less than a second battery voltage of the second battery 220, so as to charge the first battery 210 to a first regulated voltage. The difference value between the second battery voltage and the first regulating voltage is smaller than a first voltage threshold value, and the first charging voltage is not smaller than the first regulating voltage; and
the battery pack control and management unit 120 is further configured to control the charging cradle 30 to provide a second charging voltage to charge the first battery 210 and the second battery 220 when the first battery 210 is charged to the first regulated voltage, so as to charge the first battery 210 and the second battery 220 to a target battery voltage, where the target battery voltage is greater than the second battery voltage and the first regulated voltage, and the second charging voltage is not less than the target battery voltage.
In the charge control system according to the embodiment of the present application, by detecting the battery voltages of the respective batteries in the battery pack 20 and determining the first battery 210 with the smallest battery voltage among the plurality of batteries, the charging dock 30 is controlled to provide the first charging voltage to charge the first battery 210, so that the first battery 210 is charged to the first regulation voltage, and the charging dock 30 is controlled to provide the second charging voltage to charge the first battery 210 and the second battery 220, so that the first battery 210 and the second battery 220 are charged to the target battery voltage, so that the charging current can be kept small, the heat generation amount of the batteries can be controlled, and the service life of the batteries can be prolonged.
The embodiment of the application also provides an aircraft, and the aircraft comprises a battery pack 20 and the charging control device 10 of any one of the above embodiments.
The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the charging control method of any of the embodiments described above.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or the like.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A charge control device, characterized by comprising:
the charging circuit is connected with the battery pack and the charging seat so as to transmit the charging voltage provided by the charging seat to the plurality of batteries of the battery pack respectively;
the battery pack control management unit is used for controlling the charging seat to provide a first charging voltage to charge the first battery so as to charge the first battery to a first regulation voltage when the first battery voltage of the first battery is smaller than the second battery voltage of the second battery, the difference value between the second battery voltage and the first regulation voltage is smaller than a first voltage threshold value, and the first charging voltage is not smaller than the first regulation voltage; and
the battery pack control management unit is further used for controlling the charging seat to provide a second charging voltage to charge the first battery and the second battery when the first battery is charged to the first regulation voltage so as to charge the first battery and the second battery to a target battery voltage, wherein the target battery voltage is greater than the second battery voltage and the first regulation voltage, and the second charging voltage is not less than the target battery voltage.
2. The charge control device according to claim 1, wherein the first battery voltage is a minimum battery voltage among the plurality of batteries, and the second battery voltage is a battery voltage that is the smallest difference from the first battery voltage among the plurality of batteries.
3. The charge control device according to claim 1, wherein the target battery voltage is determined from battery voltages of a plurality of the batteries or from saturated battery voltages of a plurality of the batteries.
4. The charge control device according to claim 1, wherein the number of the first batteries is one or more.
5. The charging control device according to claim 1, wherein the charging circuit includes a copper bar bus interface and a plurality of relays, the plurality of relays correspond to the plurality of batteries, the copper bar bus interface is connected to the plurality of batteries through the plurality of relays, respectively, and the battery pack control and management unit includes a multi-channel fet driving subunit, and the multi-channel fet driving subunit is configured to control the on/off of the relays to provide charging voltages to the corresponding batteries.
6. The charge control device according to claim 5, wherein the battery pack includes a weak-current power supply battery for supplying power to the battery pack control management unit.
7. The charging control device of claim 6, wherein the charging circuit comprises a voltage conversion module, the voltage conversion module is connected to the weak current power supply battery and the corresponding relay, and the voltage conversion module is configured to convert the charging voltage provided by the charging dock into a weak current charging voltage for charging the weak current power supply battery.
8. A charge control method, comprising:
detecting the cell voltage of each cell in the cell group;
when a first battery voltage of a first battery is smaller than a second battery voltage of a second battery, providing a first charging voltage to charge the first battery so as to charge the first battery to a first regulation voltage, wherein the difference value between the second battery voltage and the first regulation voltage is smaller than a first voltage threshold value, and the first charging voltage is not smaller than the first regulation voltage; and
when the first battery is charged to the first regulation voltage, a second charging voltage is provided to charge the first battery and the second battery so as to charge the first battery and the second battery to a target battery voltage, wherein the target battery voltage is greater than the second battery voltage and the first regulation voltage, and the second charging voltage is not less than the target battery voltage.
9. The charge control method according to claim 8, wherein said detecting the cell voltage of each of the cells in the cell group includes:
sorting the cell voltages of a plurality of said cells;
determining the battery with the minimum battery voltage in a plurality of batteries as a first battery, wherein the battery voltage of the first battery is a first battery voltage;
and determining the battery with the minimum difference value between the battery voltage and the first battery voltage in the plurality of batteries as a second battery, wherein the battery voltage of the second battery is the second battery voltage.
10. An aircraft, characterized in that it comprises a battery pack and a charge control device according to any one of claims 1 to 7.
CN202110494973.5A 2021-05-07 2021-05-07 Charging control device, charging control method and aircraft Pending CN113517733A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115476731A (en) * 2022-11-04 2022-12-16 江苏正力新能电池技术有限公司 Battery system and management method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115476731A (en) * 2022-11-04 2022-12-16 江苏正力新能电池技术有限公司 Battery system and management method

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