WO2021217645A1 - Circuit de commande de charge et système de gestion de charge comprenant celui-ci, et appareil de charge - Google Patents

Circuit de commande de charge et système de gestion de charge comprenant celui-ci, et appareil de charge Download PDF

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Publication number
WO2021217645A1
WO2021217645A1 PCT/CN2020/088472 CN2020088472W WO2021217645A1 WO 2021217645 A1 WO2021217645 A1 WO 2021217645A1 CN 2020088472 W CN2020088472 W CN 2020088472W WO 2021217645 A1 WO2021217645 A1 WO 2021217645A1
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WO
WIPO (PCT)
Prior art keywords
control
charging
battery
control circuit
voltage
Prior art date
Application number
PCT/CN2020/088472
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English (en)
Chinese (zh)
Inventor
林宋荣
李鹏
Original Assignee
深圳市大疆创新科技有限公司
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Application filed by 深圳市大疆创新科技有限公司 filed Critical 深圳市大疆创新科技有限公司
Priority to PCT/CN2020/088472 priority Critical patent/WO2021217645A1/fr
Priority to CN202080013833.5A priority patent/CN113454870A/zh
Publication of WO2021217645A1 publication Critical patent/WO2021217645A1/fr

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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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • 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
    • 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
    • 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
    • H02J7/007—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

Definitions

  • This application relates to the field of charging, and in particular to a charging control circuit, a charging management system and a charging device having the charging control circuit.
  • the application provides a charging control circuit, a charging management system and a charging device having the charging control circuit.
  • an embodiment of the present application provides a charging control circuit.
  • the charging control circuit includes a plurality of first switch components, and each of the first switch components includes:
  • a first control switch the first control switch includes a first input terminal, a first output terminal, and a first control terminal; the first input terminal of the first control switch is used to electrically connect a power supply system; The first output terminal of a control switch is used to electrically connect a battery; and
  • a first controller electrically connected to the first control switch including a first detection terminal, a second detection terminal, and a control output terminal, the first detection terminal and the first input terminal Electrically connected, the second detection terminal is electrically connected to the first output terminal, the control output terminal is electrically connected to the first control terminal, and the first detection terminal is used to obtain the first output terminal of the first input terminal.
  • a voltage, the second detection terminal is used to obtain the second voltage of the first output terminal;
  • the power supply system can charge a plurality of the batteries through a plurality of the first control switches.
  • the corresponding first controller controls the first control switch that is electrically connected to the first control switch to be turned off.
  • an embodiment of the present application provides a charging management system, including: the charging control circuit described in the first aspect of the present application.
  • an embodiment of the present application provides a charging device, including:
  • the first interface is used to electrically connect with the power supply system
  • the second interface is used to electrically connect with the battery
  • the charging management system described in the second aspect of the present application is electrically connected between the first interface and the second interface.
  • a charging control circuit is provided between the power supply system and the multiple batteries, and the multiple batteries are respectively controlled by the multiple first switch components of the charge control circuit, and each first switch component is provided The first control switch and the first controller are electrically connected.
  • the first controller detects that the first voltage of the first input terminal of the first control switch electrically connected to the first control switch is less than the first output
  • the second voltage of the terminal is controlled to turn off the first control switch that is electrically connected to it, which solves the problem of current backflow during charging and charging of batteries of different voltages, and improves the safety of charging and charging multiple batteries;
  • the The applied charging control circuit is suitable for charging the batteries at different temperatures at the same time and heating the low-temperature batteries at the same time, and the charging speed is improved.
  • FIG. 1 is a schematic structural diagram of a charging control circuit in an embodiment of the present application
  • FIG. 2 is a schematic circuit diagram of the charging control circuit of the embodiment shown in FIG. 1;
  • FIG. 3 is a schematic structural diagram of a charging control circuit in another embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a charging control circuit in another embodiment of the present application.
  • FIG. 5 is a schematic circuit diagram of the charging control circuit of the embodiment shown in FIG. 4;
  • FIG. 6 is a schematic circuit diagram of a second controller of the charging control circuit of the embodiment shown in FIG. 4;
  • FIG. 7 is a schematic circuit diagram of a second controller of the charging control circuit of the embodiment shown in FIG. 6;
  • FIG. 8 is a schematic structural diagram of a charging management system in an embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of a charging device in an embodiment of the present application.
  • Both battery A and battery B are normal temperature batteries, and the charging voltage of battery A is lower than that of battery B.
  • the starting voltage of battery A is 40°C
  • the starting voltage of battery B is 47V.
  • the charger will charge battery A first until the voltage of battery A is At 47V, that is, when the voltage of battery A is equal to the starting charging voltage of battery B, turn on battery B and allow battery A and battery B to be charged at the same time.
  • battery A may have a higher voltage than battery B when battery B is turned on, and battery A may sink current to battery B.
  • normal temperature refers to a temperature of 25°C.
  • Battery A is a low temperature battery
  • battery B is a normal temperature battery.
  • the charging voltage of battery A is lower than that of battery B.
  • the temperature of battery B is -5°C
  • the starting voltage of battery A is 40V.
  • the charger will Resistant heating to heat battery A, when battery A is heated to normal temperature, open the charging tubes of battery A and battery B at the same time. Since the voltage when battery A is heated to room temperature is still the charging voltage of battery A, when battery A is heated to room temperature, the voltage of battery A is lower than that of battery B, and battery B will sink a large current into battery A.
  • Both battery A and battery B are low-temperature batteries, and the starting charging voltage of battery A is lower than that of battery B.
  • the temperature of battery A and battery B are both -5°C
  • the starting voltage of battery A is 40V
  • the starting voltage of battery B is 47V.
  • the present application provides a charging control circuit between the power supply system and the multiple batteries.
  • the multiple first switch components of the charge control circuit are used to control the multiple batteries, and each first switch component is electrically connected.
  • the first control switch and the first controller when multiple batteries are in the charging state at the same time, if the first controller detects that the first voltage of the first input terminal of the first control switch electrically connected to the first control switch is less than the second output terminal of the first controller.
  • the first control switch electrically connected to it is controlled to be turned off, which solves the problem of current backflow during charging and charging of batteries of different voltages, and improves the safety of charging and charging multiple batteries; at the same time, the charging of the present application
  • the control circuit is suitable for charging the batteries at different temperatures at the same time and heating the low-temperature batteries at the same time, and the charging speed of the batteries at room temperature is improved.
  • the charging control circuit may include a plurality of first switch components 10.
  • the number of the first switch components 10 is two, that is, the charging control circuit includes Two first switch assemblies 10; it should be understood that the number of the first switch assemblies 10 can also be other, such as 3, 4, 5, or more than 5.
  • each of the first switch components 10 may include a first control switch 11 and a first controller 12, wherein the first control switch 11 and the first controller 12 are correspondingly electrically connected.
  • the first control switch 11 may include a first input terminal 111, a first output terminal 112, and a first control terminal 113
  • the first controller 12 may include a first detection terminal 121, a second detection terminal 122, and Control output 123.
  • the first input terminal 111 is used to electrically connect to the power supply system
  • the first output terminal 112 is used to electrically connect to the battery
  • the first detection terminal 121 is electrically connected to the first input terminal 111
  • the second detection terminal 122 is electrically connected to the first output terminal 112.
  • the control output terminal 123 is electrically connected to the first control terminal 113.
  • the first detection terminal 121 is used to obtain the first voltage of the first input terminal 111
  • the second detection terminal 122 is used to obtain the second voltage of the first output terminal 112.
  • the power supply system can charge multiple batteries respectively through multiple first control switches 11.
  • the first voltage is detected to be less than the second voltage
  • the corresponding first voltage A controller 12 controls the first control switch 11 electrically connected to it to be turned off (ie, turned off).
  • the first control switch 11 electrically connected to it to be turned off (ie, turned off). It should be noted that, in the embodiments of the present application, that multiple batteries are in a charging state at the same time means that the charging tubes of multiple batteries are opened at the same time for charging and charging.
  • the voltage of battery A is less than the voltage of battery B.
  • the voltage of battery A is 40V and the voltage of battery B is 47V.
  • the power supply system charges battery A and battery B respectively through two first control switches 11.
  • the power supply system is connected to charging
  • the voltage at one end of the control circuit that is, the end of the power supply system connected to the multiple first control switches 11
  • the voltage at the end of the power supply system connected to the charging control circuit will be slightly higher than that of battery A.
  • the voltage such as 40.7V.
  • the voltage at one end of the power supply system connected to the charging control circuit will gradually increase.
  • the voltage at the end of the power supply system connected to the charging control circuit is pulled down by the voltage of battery A, resulting in the voltage at the end of the power supply system connecting to the charging control circuit being lower than the voltage of battery B.
  • the first controller 12 corresponding to battery B will detect that the first voltage of the first control switch 11 electrically connected to battery B is less than the second voltage of the first control switch 11 electrically connected to battery B.
  • battery B corresponds to The first controller 12 turns off the first control switch 11 that is electrically connected to the battery B, thereby preventing the battery B from charging the battery A, and avoiding the phenomenon of current backflow. If the first controller 12 corresponding to the battery B detects that the first voltage of the first control switch 11 electrically connected to the battery B is less than the second voltage of the first control switch 11 electrically connected to the battery B, it does not turn off and The first control switch 11 that is electrically connected to battery B, that is, the first control switch 11 that is electrically connected to battery B, continues to conduct. Then, since the voltage of battery B is greater than that of battery A, battery B will charge battery A and cause current to flow back. .
  • the control output terminal 123 of the first controller 12 outputs a first control signal, so that the first control switch 11 is turned on, so that the power supply system charges the battery.
  • the first controller 12 corresponding to battery A will detect the first battery connected to battery A.
  • the first voltage of the first input terminal 111 of the control switch 11 is greater than the voltage of the first output terminal 112 of the first control switch 11 electrically connected to the battery A. At this time, the battery A can be charged through the power supply system.
  • the control output terminal 123 of the first controller 12 outputs a second control signal, so that the corresponding first control switch 11 is turned off.
  • the first control signal is at a low level and the second control signal is at a high level; optionally, the first control signal is at a high level and the second control signal is at a low level.
  • the first control signal and the second control signal are related to the type of the first control switch 11.
  • the first control switch 11 may be a metal oxide semiconductor field effect MOS transistor (Metal Oxide Semiconductor), or may be another type of switch transistor.
  • MOS transistor Metal Oxide Semiconductor
  • the first control switch 11 is an N-type metal oxide semiconductor field-effect NMOS (Negative channel Metal Oxide Semiconductor), the first control signal is at a high level, and the second control signal is at a low level.
  • the first input terminal 111 is the source of the first control switch 11
  • the first output terminal 112 is the drain of the first control switch 11
  • the first control terminal 113 is the gate of the first control switch 11.
  • the first control switch 11 may also be a P-type metal oxide semiconductor field effect PMOS (Positive channel Metal Oxide Semiconductor).
  • the MOS tube includes a first body diode 114.
  • the anode of the first body diode 114 is connected to the source, and the cathode of the first body diode 114 is connected to the drain.
  • the first voltage of the source is greater than the second voltage of the drain, and the voltage difference between the first voltage and the second voltage is greater than the turn-on voltage of the first body diode 114, the first body diode 114 of the NMOS transistor is turned on .
  • the corresponding control output terminal 123 of the first controller 12 When the first body diode 114 is turned on, the corresponding control output terminal 123 of the first controller 12 outputs a first control signal, so that the source and drain are turned on, so that the power supply system charges the battery connected to the NMOS tube . At this time, if the battery is charged through the first body diode 114, a heat loss of several tens of watts will be generated on the diode, so the battery cannot be directly charged through the first body diode 114. In the embodiment of the present application, when the first body diode 114 is turned on, the first controller 12 controls the source and drain to be turned on, so that the battery is charged through the channel formed by the source and the drain. The channel impedance is small, and the heat loss is small.
  • the voltage at the end of the power supply system connected to the charging control circuit is pulled down by the voltage of battery A
  • the voltage at the end of the power supply system connected to the charging control circuit is the difference between the voltage of battery A and the conduction voltage of the first body diode 114.
  • the gradient of the voltage gradually increasing at one end of the power supply system connected to the charging control circuit is the conduction voltage of the first body diode 114.
  • the first controller 12 includes a comparator.
  • the first detection terminal 121 is one of the non-inverting input terminal and the inverting input terminal of the comparator.
  • the second detection terminal 122 is the other of the non-inverting input terminal and the inverting input terminal of the comparator, and the control output terminal 123 is the output terminal of the comparator; of course, the first controller 12 can also be another first detection terminal 121 , The integrated device of the second detection terminal 122 and the control output terminal 123.
  • the first controller 12 may also include a power terminal (VS of the first controller 12 in FIG. 2), a ground terminal (GND of the first controller 12 in FIG. 2), etc., optionally As shown in Figure 2, the ground terminal of the first controller 12 is grounded, the power terminal of the first controller 12 is grounded through a capacitor (C in Figure 2), and the power terminal is also connected through a resistor (R in Figure 2) The cathode of the diode (D in FIG. 2) is connected, and the anode of the diode is connected to a voltage source (VCC in FIG. 2) to supply power to the first controller 12.
  • VCC voltage source
  • the plurality of batteries includes a first battery and a second battery.
  • first battery when the first battery is in a charged state and the second battery is switched from a non-charged state to a charged state, there are two situations as follows:
  • the first voltage detected by the first detection terminal 121 of the first controller 12 corresponding to the second battery is less than the second detection terminal 122 detected by the second battery. Voltage.
  • the control output of the first controller 12 corresponding to the second battery is The terminal 123 outputs the first control signal, so that the corresponding first control switch 11 is turned off, so as to prevent the second battery from charging the first battery.
  • the second battery is switched from the non-charging state to the charging state means that the charging tube of the second battery is switched from the closed state to the open state.
  • the first controller 12 corresponding to the second battery controls the first control switch 11 electrically connected to the second battery to turn off, so as to prevent the problem of current backflow caused by the second battery charging the first battery.
  • the first voltage detected by the first detection terminal 121 of the first controller 12 corresponding to the first battery is greater than the first voltage detected by the second detection terminal 122
  • the second voltage changes to be smaller than the second voltage detected by the second detection terminal 122 of the first IC integrated circuit.
  • the first controller 12 corresponding to the first battery controls the first control that is electrically connected to the first battery
  • the switch 11 is turned off, thereby preventing the problem of current backflow caused by the charging of the second battery by the first battery.
  • the charging control circuit of the embodiment of the present application may further include a plurality of second switch components 20 electrically connected to the first switch component 10, and the second switch components 20 correspond to the first switch components 10 one-to-one.
  • each second switch assembly 20 may include a second control switch 21.
  • the second control switch 21 is used to electrically connect the first input terminal 111 and the power supply system.
  • the second control switch 21 can control the power supply and the second control switch 21.
  • the electrical connection between an input terminal 111 is on or off.
  • the second control switch 21 controls the electrical connection between the power supply system and the corresponding first control switch 11 to improve the flexibility of control.
  • the number of the second switch assembly 20 is less than the number of the first switch assembly 10.
  • the number of the second switch assembly 20 is one.
  • One switch assembly 10 corresponds, so that the electrical connections between the power supply system and the first control switches 11 that control multiple first switch assemblies 10 are controlled to be turned on or off through the second control switch 21 of one second switch assembly 20; of course;
  • the number of the second switch components 20 can also be other sizes smaller than the number of the first switch components 10.
  • a part of the second switch components 20 corresponds to the first switch component 10 one-to-one, and the other part of the second switch components 20 corresponds to a plurality of first switch components.
  • a switch assembly 10 corresponds.
  • a one-to-one correspondence between the second switch assembly 20 and the first switch assembly 10 is taken as an example.
  • the second switch component 20 may further include a second controller 22, and the second control switch 21 may include a second input terminal 211, a second output terminal 212 and a second control terminal 213.
  • the second input terminal 211 is used to electrically connect to the power supply system
  • the second output terminal 212 is electrically connected to the first input terminal 111
  • the second control terminal 213 is electrically connected to the second controller 22.
  • the second controller 22 can control the second control switch 21 to turn on or off, correspondingly to turn on or off the electrical connection between the power supply system and the first input terminal 111.
  • the second controller 22 controls the second control switch 21 to be turned on, so as to further improve the safety of battery charging.
  • the status information includes temperature and/or voltage
  • the specific conditions include: the temperatures of the multiple batteries are greater than or equal to a preset temperature threshold and/or the voltages of the multiple batteries are equal, and the preset temperature threshold may be normal temperature.
  • the second controller 22 controls the second control switch 21 to be turned on, so that there is no current backflow caused by multiple batteries and charging. problem.
  • the status information may also include other status information of the battery, and correspondingly, the specific conditions may also include others.
  • the second control switch 21 may be a metal oxide semiconductor field effect MOS tube (Metal Oxide Semiconductor), or may be another type of switch tube.
  • MOS tube Metal Oxide Semiconductor
  • the second control switch 21 is an N-type metal oxide semiconductor field-effect NMOS transistor (Negative channel Metal Oxide Semiconductor), and the second input terminal 211 is the drain of the second control switch 21.
  • the output terminal 212 is the source of the second control switch 21, and the second control terminal 213 is the gate of the second control switch 21.
  • the second control switch 21 may also be a P-type metal oxide semiconductor field effect PMOS (Positive channel Metal Oxide Semiconductor).
  • the first control switch 11 and the second control switch 21 are both NMOS transistors, and the two NMOS transistors are connected back to back. This design can prevent the respective body diodes from generating reverse leakage.
  • the first and second controllers do not refer to an integrated device, and may be an integrated device or a non-integrated device.
  • the second controller 22 may include a first control circuit 221 and a second control circuit 222.
  • the first control circuit 221 is coupled to the second control circuit 222.
  • the first control circuit 221 controls the second control circuit 222.
  • the second control circuit 222 is turned on or off to control the second control switch 21 to be turned on or off. It should be understood that FIG. 6 only shows the first switch assembly 10 and the second switch assembly 20 that cooperate with each other.
  • the first control circuit 221 may include a light-emitting device 2211, and the second control circuit 222 may include a photoelectric converter 2221.
  • the first control circuit 221 may further include a first voltage source 2212, the light emitting device 2211 includes a light emitting diode, and the first voltage source 2212 can supply power to the light emitting diode so that the light emitting diode emits light.
  • the size of the first voltage source 2212 can be 3.3V or other. It should be understood that the light emitting device 2211 may also be other.
  • the second controller 22 may further include a third control circuit 223, and the third control circuit 223 is used to control whether the first voltage source 2212 supplies power to the light emitting diode.
  • the anode of the light-emitting diode is electrically connected to the first voltage source 2212
  • the cathode of the light-emitting diode is electrically connected to the third control circuit 223.
  • the third control circuit 223 controls the cathode of the diode to be grounded, the first voltage source 2212 supplies power to the light-emitting diode. , Which makes the light-emitting diodes emit light.
  • the third control circuit 223 may include a switch and an MCU.
  • the cathode of the light-emitting diode is grounded through the switch, and the MCU can control the switch to turn on or off.
  • the MCU controls the switch to turn on, the cathode of the diode is grounded.
  • the voltage source 2212 supplies power to the light emitting diode, so that the light emitting diode emits light. It should be understood that the third control circuit 223 can also be designed with other structures.
  • the photoelectric converter 2221 of the embodiment of the present application may be a first triode, or other transistors.
  • the light emitting device 2211 is a light emitting diode
  • the photoelectric converter 2221 is a first triode
  • the light emitting diode and the first triode cooperate to form a photoelectric coupling device.
  • the second control circuit 222 may also include a third control switch 2222.
  • the photoelectric converter 2221 is electrically connected to the third control switch 2222.
  • the electrical signal is used to control the conduction of the third control switch 2222 so that the second The control circuit 222 is turned on.
  • the third control switch 2222 is a second triode, and the photoelectric converter 2221 is electrically connected to the base of the second triode.
  • the photoelectric converter 2221 is a first triode, the base of the first triode is facing the light-emitting device 2211, the collector of the first triode is connected to the base of the second triode, and the first triode is connected to the base of the second triode.
  • the collector of a triode is also connected to a voltage source, and the emitter of the first triode is grounded.
  • the first triode is turned on, and the collector of the first triode outputs an electrical signal to the base of the second triode, so that the second triode is turned on.
  • the second control circuit 222 may further include a second voltage source 2223 and a first resistor R1, the collector of the second triode is electrically connected to the second voltage source 2223, and the second triode The emitter of the second transistor is electrically connected to the second control terminal 213, and the emitter of the second triode is also electrically connected to the second output terminal 212 through the first resistor R1.
  • the voltage of the emitter of the second triode is directly input to the second control terminal 213, and the voltage of the emitter of the second triode is reduced by the first resistor R1 and then input to the second input terminal 211, so that A voltage difference is formed between the second control terminal 213 and the second control terminal 213 so that the second control switch 21 is turned on.
  • the voltage of the emitter of the second triode is directly input to the gate of the second control switch 21, and the voltage of the emitter of the second triode is passed through
  • the first resistor R1 is stepped down, the voltage is input to the source of the second control switch 21, so that a voltage difference is formed between the gate and the source, and the NMOS transistor is turned on.
  • the first resistor R1 is not a limitation on the number of resistors, and the first resistor R1 may include multiple resistors connected in series and/or in parallel.
  • the second control circuit 222 may further include a second resistor, and the emitter of the second triode is electrically connected to the second control terminal 213 through the second resistor connection, and the emitter of the second triode is also connected to the second control terminal 213.
  • the second resistor and the first resistor R1 connected in series are electrically connected to the second output terminal 212, so that a voltage difference is formed between the second control terminal 213 and the second output terminal 212, and the second control switch 21 is turned on.
  • the second resistor is not a limitation on the number of resistors, and the second resistor may include multiple resistors connected in series and/or in parallel.
  • the voltage of the second voltage source 2223 is greater than the voltage of the power supply system, so that the voltage of the second control terminal 213 is greater than the voltage of the second output terminal 212, and the voltage of the second control terminal 213 is the same as the voltage of the second output terminal 212.
  • the difference between the voltages is greater than or equal to the turn-on voltage of the second control switch 21.
  • the difference between the voltage of the second voltage source 2223 and the voltage of the power supply system is greater than or equal to 9V.
  • the voltage of the second voltage source 2223 is 62V
  • the voltage of the power supply system is 53V.
  • the first control circuit 221 and the second control circuit 222 may also be designed in other structures.
  • the first control circuit 221 includes a power switch circuit
  • the second control circuit 222 includes a solid state relay.
  • the power switch circuit When the power switch circuit is turned on, the power switch circuit outputs voltage to the solid state relay, so that the solid state relay is turned on to control the second control switch 21 to turn on; when the power switch circuit is turned off, the solid state relay is turned off without voltage input, and the second control The switch 21 is also turned off.
  • the charging control circuit of the embodiment of the present application When multiple batteries under different operating conditions (different voltages and/or different temperatures) are charged and charged in parallel, the charging control circuit of the embodiment of the present application is used, and the charging tubes of multiple batteries are turned on at the same time, and there is no current backflow problem;
  • the room temperature battery and the low temperature battery are mixed, only one charging strategy can be used. There is no need to use the two strategies of the room temperature charging strategy and the low temperature charging strategy, which simplifies the software implementation process; in addition, in the process of charging the room temperature battery, you can At the same time, the low-temperature battery is heated, charging and heating do not interfere with each other; it can also heat multiple low-temperature batteries at the same time.
  • the charging control device of the embodiment of the present application solves the problem of mutual recharge when multiple batteries are charged at the same time, the problem of mutual recharge at the moment of charging when multiple low-temperature batteries are heated, and the problem of anti-recharge of low-temperature batteries when batteries with different temperatures are charged at the same time , Low-temperature battery heating, the current backflow problem when charging the battery at room temperature at the same time, the current low-temperature battery heating can only be one, not multiple heating problems, etc., improve the safety of parallel charging and charging speed.
  • the battery in the charging state means that the charging tube of the battery is in the open state
  • the battery heating means that the internal resistance of the battery is turned on to heat the battery.
  • low-temperature batteries it is usually heated before charging.
  • normal temperature batteries you can directly open the battery charging tube for charging.
  • an embodiment of the present application also provides a charging management system.
  • the charging management system may include the charging control circuit of the foregoing embodiment.
  • the charge management system may also include a charge management circuit for managing one or more of the working state of the battery, the battery's power balance, and the battery's power, so as to facilitate the user's management of the battery, so that the battery can be It is used reasonably to improve the life of the battery.
  • the charging device may include a first interface, a second interface, and the charging management system of the foregoing embodiment.
  • the first interface is used for electrical connection with the power supply system
  • the second interface is used for electrical connection with the battery
  • the charging management system is electrically connected between the first interface and the second interface.
  • the charging device in this embodiment may be one of a charging box, a charging pile, and a charger, or may be other types of charging devices.
  • the charging device of the embodiment of the present application can be used as a charging device for a high-power drone, a charging device with multi-battery charging function, or a charging device with a low-temperature battery that is first heated and then recharged.
  • the power supply system can be used to connect to the city power to provide charging power for the charging device, or it can be composed of storage batteries to provide the charging power for the charging device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Circuit de commande de charge et système de gestion de charge comprenant celui-ci, et appareil de charge. Le circuit de commande de charge comprend une pluralité de premiers ensembles commutateurs (10), chaque premier ensemble commutateur comprenant : un premier commutateur de commande (11), une première extrémité d'entrée (111) de celui-ci étant utilisée pour être connectée électriquement à un système d'alimentation électrique, et une première extrémité de sortie (112) de celui-ci étant utilisée pour être connectée électriquement à une batterie ; et un premier dispositif de commande (12) connecté électriquement au premier commutateur de commande, une première extrémité de détection (121) du premier dispositif de commande étant électriquement connectée à la première extrémité d'entrée, une seconde extrémité de détection (122) de celui-ci étant connectée électriquement à la première extrémité de sortie, et une extrémité de sortie de commande (123) de celui-ci étant connectée électriquement à une première extrémité de commande (113) du premier commutateur de commande. Le système d'alimentation électrique peut charger respectivement une pluralité de batteries au moyen d'une pluralité de premiers commutateurs de commande. Lorsque la pluralité de batteries sont dans un état de charge en même temps, s'il est détecté qu'une première tension de la première extrémité d'entrée est inférieure à une seconde tension de la première extrémité de sortie, un premier dispositif de commande correspondant commande un premier commutateur de commande électriquement connecté à celui-ci pour l'éteindre.
PCT/CN2020/088472 2020-04-30 2020-04-30 Circuit de commande de charge et système de gestion de charge comprenant celui-ci, et appareil de charge WO2021217645A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2020/088472 WO2021217645A1 (fr) 2020-04-30 2020-04-30 Circuit de commande de charge et système de gestion de charge comprenant celui-ci, et appareil de charge
CN202080013833.5A CN113454870A (zh) 2020-04-30 2020-04-30 充电控制电路及具有其的充电管理系统、充电装置

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PCT/CN2020/088472 WO2021217645A1 (fr) 2020-04-30 2020-04-30 Circuit de commande de charge et système de gestion de charge comprenant celui-ci, et appareil de charge

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