WO2018192224A1 - Procédé et appareil de commutation de batterie, et système et procédé de commutation pour circuit d'alimentation électrique - Google Patents

Procédé et appareil de commutation de batterie, et système et procédé de commutation pour circuit d'alimentation électrique Download PDF

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Publication number
WO2018192224A1
WO2018192224A1 PCT/CN2017/113514 CN2017113514W WO2018192224A1 WO 2018192224 A1 WO2018192224 A1 WO 2018192224A1 CN 2017113514 W CN2017113514 W CN 2017113514W WO 2018192224 A1 WO2018192224 A1 WO 2018192224A1
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WIPO (PCT)
Prior art keywords
power supply
supply circuit
battery
switch
voltage
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Application number
PCT/CN2017/113514
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English (en)
Chinese (zh)
Inventor
李振国
祝凌云
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北京凌云智能科技有限公司
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Publication of WO2018192224A1 publication Critical patent/WO2018192224A1/fr

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    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • 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
    • H02J7/36—Arrangements using end-cell switching
    • 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

Definitions

  • the present application relates to the field of circuits, and in particular, to a method and apparatus for battery switching and a switching system and method for a power supply circuit.
  • the battery switching technology realizes that each group of batteries is separately charged and discharged by grouping the batteries, and the battery switching technology is applied to the electric vehicle field, and the plurality of batteries are used as electric vehicles, so that when a certain group of batteries is used up, the battery is switched to the next one.
  • the battery pack is powered, and each battery pack can be removed separately for home charging.
  • the embodiments of the present application provide a battery switching method and apparatus, and a power supply circuit switching system and method, to at least solve the technical problem that the multiple switches cannot be seamlessly switched to the load.
  • a method for switching a battery includes: supplying power to a load by using a first battery in a first power supply circuit, wherein the first power supply circuit is any of at least two power supply circuits One, the voltage of the first battery is greater than a preset voltage; and the first battery is powered by the load During the process, detecting the voltage of the first battery; when detecting that the voltage of the first battery is greater than the preset voltage, continuing to use the first battery to supply power to the load; when detecting the first When the voltage of the battery is less than or equal to the preset voltage, first controlling the second battery in the second power supply circuit to supply power to the load, and then controlling the first battery to stop supplying power to the load, wherein the second power supply The circuit is any one of the at least two power supply circuits different from the first power supply circuit, and the voltage of the second battery is greater than the preset voltage.
  • the method further includes: blocking the second power supply circuit and the first power supply circuit to block the second power supply circuit Powering the first power supply circuit.
  • the power supply to the load by the first battery in the first power supply circuit includes: limiting a current supply current in the first power supply circuit to obtain a first current; and supplying power to the load by using the first current; Detecting whether a ratio of a voltage across the load to a voltage of the first battery reaches a preset threshold; when a ratio of a voltage across the load to a voltage of the first battery reaches the preset threshold, stopping The current of the supply current is limited, and the load is used to supply power to the load.
  • first controlling the second battery in the second power supply circuit to supply power to the load, and then controlling the first battery to stop supplying power to the load includes: limiting current supply current in the second power supply circuit, to obtain a Two currents; supplying power to the load by using the second current; detecting whether a ratio of a voltage across the load to a voltage of the second battery reaches the preset threshold; a voltage and a voltage across the load Stopping the current limit of the supply current when the ratio of the voltage of the second battery reaches the preset threshold, and supplying power to the load by using the supply current; after powering the load by using the supply current Controlling the first battery to stop supplying power to the load.
  • the method further includes: arbitrarily selecting one target power supply circuit from the at least two power supply circuits; detecting the battery in the target power supply circuit Whether the voltage is greater than a preset voltage; when the voltage of the battery in the target power supply circuit is greater than the preset voltage, the target power supply circuit is used as the first power supply circuit.
  • a switching system of a power supply circuit includes: a load; at least two power supply circuits, wherein the at least two power supply circuits are connected in parallel, and each of the power supply circuits and The load is connected in series, wherein each of the power supply circuits has the same circuit composition, and each of the power supply circuits includes a battery and a first switch, wherein a first end of the first switch is coupled to a positive pole of the battery The second end of the first switch is coupled to the positive pole of the load, and when the first switch is closed, the battery is powered by the battery in the power supply circuit, and the power supply circuit further includes a second switch and a diode, the second switch being connected in parallel with the diode, the first switch being connected in series with the second switch in parallel and the diode, wherein a positive pole of the diode and the battery a positive pole coupled to the second end of the diode The positive pole of the load is coupled, wherein when the switching of the power supply
  • the power supply circuit further includes: a third switch and a pre-charge resistor, the third switch is connected in parallel with the pre-charge resistor, the first switch and the third switch after parallel connection and the pre-charge A resistor is connected in series, wherein a first end of the pre-charge resistor is coupled to a positive terminal of the battery, and a second end of the pre-charge resistor is coupled to a positive electrode of the load.
  • the power supply circuit further includes: a fourth switch, a first end of the fourth switch is connected to a negative pole of the battery, and a second end of the fourth switch is connected to a negative pole of the load,
  • the battery is powered by the battery in the power supply circuit when the first switch and the fourth switch are closed.
  • a switching method for a power supply circuit of the above switching system comprising: controlling a first switch of the first power supply circuit and a fourth switch of the first power supply circuit to be closed
  • the first power supply circuit is any one of the at least two power supply circuits, the voltage of the battery of the first power supply circuit is greater than a preset voltage; the first switch and the first power supply circuit After the fourth switch of the first power supply circuit is closed, detecting the voltage of the battery of the first power supply circuit; and when detecting that the voltage of the battery of the first power supply circuit is greater than the preset voltage, maintaining the first The first switch of the power supply circuit and the fourth switch of the first power supply circuit are closed; when detecting that the voltage of the battery of the first power supply circuit is less than or equal to the preset voltage, first controlling the second power supply circuit a switch and a fourth switch of the second power supply circuit are closed, and then the first switch of the first power supply circuit and the fourth switch of the first power supply circuit are
  • the power supply circuit includes a second switch and a diode, and before the first switch of the first power supply circuit and the fourth switch of the first power supply circuit are closed, the method further includes: controlling the first power supply circuit The second switch is closed; before the first switch controlling the second power supply circuit and the fourth switch of the second power supply circuit are closed, the method further comprises: controlling the second switch of the first power supply circuit to be disconnected, The first power supply circuit and the second power supply circuit are blocked by the diode.
  • the power supply circuit includes a third switch and a pre-charge resistor, and before the first switch that controls the first power supply circuit and the fourth switch of the first power supply circuit are closed, the method further includes: controlling the A third switch of a power supply circuit is turned off; detecting whether a ratio of a voltage across the load to a voltage of a battery in the first power supply circuit reaches a preset threshold; a voltage across the load and the first power supply circuit When the ratio of the voltage of the middle battery reaches the first threshold, the third switch of the first power supply circuit is controlled to be closed.
  • the method further includes: controlling the third switch of the second power supply circuit to be turned off; After the first switch of the two power supply circuits and the fourth switch of the second power supply circuit are closed, the method further includes: detecting whether the voltage between the voltage across the load and the voltage of the battery in the second power supply circuit reaches the stated a preset threshold; when the voltage between the voltage across the load and the voltage of the battery in the second power supply circuit reaches the preset threshold, controlling the third switch of the second power supply circuit to be closed; controlling the second After the third switch of the power supply circuit is closed, the first switch that controls the first power supply circuit and the fourth switch of the first power supply circuit are turned off.
  • a battery switching device comprising: a first power supply unit, configured to supply power to a load by using a first battery in a first power supply circuit, wherein the first power supply The circuit is any one of a plurality of power supply circuits, each of the power supply circuits has the same circuit composition, the voltage of the first battery is greater than a preset voltage, and the detecting unit is configured to supply power to the load at the first battery During the process, the voltage of the first battery is detected; the second power supply unit is configured to continue to use the first battery to supply power to the load when detecting that the voltage of the first battery is greater than the preset voltage; a third power supply unit, configured to first control a second battery in the second power supply circuit to supply power to the load, and then control the first battery, when detecting that the voltage of the first battery is less than or equal to the preset voltage Stop supplying power to the load, wherein the second power supply circuit is any one of the plurality of power supply circuit
  • the device further includes: a blocking unit, configured to block the second power supply circuit and the first power supply circuit to block the second battery after controlling the second power supply circuit to supply power to the load
  • the second power supply circuit supplies power to the first power supply circuit.
  • a storage medium including a stored program, wherein a method of controlling a device in which the storage medium is located to perform the battery switching described above and a power supply when the program is running Circuit switching method.
  • a processor for operating a program wherein the program is executed while the battery switching method and the switching method of the power supply circuit are performed.
  • the method is as follows: the first battery is used to supply power to the load, and the first power supply circuit is any one of the at least two power supply circuits, and the voltage of the first battery is greater than Setting a voltage; detecting, during the power supply of the first battery, the voltage of the first battery; and when detecting that the voltage of the first battery is greater than the preset voltage, continuing to adopt the a battery powers the load; when detecting that the voltage of the first battery is less than or equal to the preset voltage, first controlling a second battery in the second power supply circuit to supply power to the load, and then controlling the first The battery stops supplying power to the load, wherein the second power supply circuit is any one of the plurality of power supply circuits different from the first power supply circuit, The voltage of the second battery is greater than the preset voltage.
  • the second battery When the voltage of the first battery is less than or equal to the preset voltage, the second battery is first controlled to supply power to the load, and then the first battery is controlled to supply power to the load.
  • the purpose of continuously supplying power to the load during battery switching is to achieve the technical effect of seamlessly switching the power supply to the load by using multiple sets of batteries, thereby solving the technical problem that the multi-group battery cannot be seamlessly switched to the load.
  • FIG. 1 is a flow chart of an alternative battery switching method according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an alternative power supply circuit switching system according to an embodiment of the present application.
  • FIG. 3 is a flowchart of a method for switching an optional power supply circuit according to an embodiment of the present application
  • FIG. 4 is a flowchart of a method for switching an optional power supply circuit according to an embodiment of the present application
  • FIG. 5 is a schematic diagram of an alternative battery switching device in accordance with an embodiment of the present application.
  • FIG. 1 is a flowchart of an alternative battery switching method according to an embodiment of the present application. As shown in FIG. 1 , the method includes the following steps:
  • Step S102 The first battery is powered by the first battery in the first power supply circuit, wherein the first power supply circuit is any one of the at least two power supply circuits, and the voltage of the first battery is greater than a preset voltage;
  • Step S104 detecting a voltage of the first battery during the process of supplying power to the load by the first battery
  • Step S106 when it is detected that the voltage of the first battery is greater than the preset voltage, continue to use the first battery to supply power to the load;
  • Step S108 when detecting that the voltage of the first battery is less than or equal to the preset voltage, first controlling the second battery in the second power supply circuit to supply power to the load, and then controlling the first battery to stop supplying power to the load, wherein the second power supply circuit is The power of the second battery is greater than the preset voltage in any one of the at least two power supply circuits different from the first power supply circuit.
  • the switching method of the battery provided by the embodiment of the present application can be used for switching between two or more sets of batteries.
  • the battery is switched to another group of batteries, and the other one is switched to another battery.
  • the battery pack supplies power to the load and maintains uninterrupted power supply during battery switching to achieve seamless switching of the battery.
  • each group of batteries is disposed in a power supply circuit, the first battery is disposed in the first power supply circuit, and the second battery is disposed in the second power supply circuit, the first battery is different from the second battery.
  • the first power supply circuit is different from the second power supply circuit.
  • the battery in the embodiment of the present application may further include a battery other than the first battery and the second battery. Switching between the battery and other batteries included in embodiments of the present application.
  • the first battery is any one of the plurality of batteries in the embodiment of the present application.
  • the first battery may be used to supply power to the load.
  • the voltage of the first battery is continuously decreased.
  • the second battery is used to control the load, and the second battery is the other battery. Any one of the batteries having a voltage greater than the preset voltage is powered by the second battery. Then, the first battery is stopped to supply power to the load to realize uninterrupted power supply to the load, that is, seamless switching of the battery.
  • the following method is adopted: using the first battery in the first power supply circuit to supply the load
  • the first power supply circuit is any one of the at least two power supply circuits, and the voltage of the first battery is greater than a preset voltage; during the power supply of the first battery to the load, the voltage of the first battery is detected; when the first battery is detected When the voltage is greater than the preset voltage, the first battery is continuously used to supply power to the load; when the voltage of the first battery is detected to be less than or equal to the preset voltage, the second battery in the second power supply circuit is first controlled to supply power to the load, and then the control is performed.
  • a battery stops supplying power to the load wherein the second power supply circuit is any one of the plurality of power supply circuits different from the first power supply circuit, and the voltage of the second battery is greater than a preset voltage, and the voltage of the first battery is less than or When the voltage is equal to the preset voltage, the second battery is first controlled to supply power to the load, and then the first battery is controlled to supply power to the load, thereby achieving the purpose of continuously supplying power to the load during battery switching, thereby achieving seamless switching by using multiple sets of batteries.
  • the technical effect of the load supply solves the technical problem that the battery cannot be seamlessly switched to the load through multiple sets of batteries.
  • the method before controlling the second battery to supply power to the load in the second power supply circuit, the method further includes: blocking the second power supply circuit and the first power supply circuit to prevent the second power supply circuit from supplying power to the first power supply circuit.
  • the second battery Since the voltage of the first battery is less than or equal to the preset voltage, the second battery is first controlled to supply power to the load, and then the first battery is stopped to supply power to the load. Therefore, the first battery and the second battery are simultaneously loaded.
  • the second battery with high power is charged for the first battery with low power, which may cause excessive current on the power supply line, heat generation and ignition of the power supply line.
  • the second is blocked first.
  • the power supply circuit and the first power supply circuit control the second battery to supply power to the load, thereby avoiding the second battery in the second charging circuit to the first charging circuit when the first battery and the second battery simultaneously supply power to the load The situation in which the first battery in the battery is charged.
  • using the first battery in the first power supply circuit to supply power to the load includes: limiting current supply current in the first power supply circuit to obtain a first current; using the first current to supply power to the load; detecting voltage across the load Whether the ratio of the voltage to the first battery reaches a preset threshold; when the ratio of the voltage across the load to the voltage of the first battery reaches a preset threshold, the current limiting of the supply current is stopped, and the supply current is used to supply power to the load.
  • the initial current in the power supply line is large due to the higher initial voltage of the first battery.
  • the current in the power supply line can be limited when the first battery starts to supply power to the load.
  • the current in the first power supply circuit is limited to obtain a first current, and the first current is used to supply power to the load, and the voltage at both ends of the load is first.
  • the ratio of the battery voltage reaches a preset threshold, the current limit of the current in the power supply line is canceled.
  • the current of the first power supply circuit is limited, a smaller current is obtained, and the load is supplied with power, and the voltage across the load continues to increase during the power supply process.
  • the voltage across the load and the voltage of the first battery reach a preset When the threshold value is 95%, the current limit is canceled. Since the voltage across the load at this time is close to the voltage of the first battery, the supply current in the first power supply circuit does not generate excessive current.
  • first controlling the second battery in the second power supply circuit to supply power to the load, and then controlling the first battery to stop supplying power to the load includes: limiting current supply current in the second power supply circuit to obtain a second current; using the second current Powering the load; detecting whether the ratio of the voltage across the load to the voltage of the second battery reaches a preset threshold; stopping the current limiting current when the ratio of the voltage across the load to the voltage of the second battery reaches a preset threshold And using the supply current to supply power to the load; after the supply current is used to supply power to the load, the first battery is controlled to stop supplying power to the load.
  • the battery When the voltage of the first battery is less than or equal to the preset voltage, when the second battery is used to supply power to the load, since the initial voltage of the second battery is higher and is far greater than the voltage across the load, the battery is switched when the battery is switched.
  • the current in is large.
  • the current in the second power supply circuit can be limited to obtain a second current, and the second current is used.
  • the load is supplied with power, and when the ratio of the voltage across the load to the second battery voltage reaches a preset threshold, the current limiting of the current in the second power supply circuit is canceled.
  • the current of the second power supply circuit is limited, a smaller current is obtained, and the load is supplied with power, and the voltage across the load continues to increase during the power supply process.
  • the ratio of the voltage across the load to the voltage of the second battery reaches 95% of the preset threshold, the current limit is canceled. Since the voltage across the load is close to the voltage of the second battery, the supply current in the second power supply circuit does not Excessive current is present.
  • the method further includes: arbitrarily selecting one target power supply circuit from the at least two power supply circuits; and detecting whether the voltage of the battery in the target power supply circuit is greater than a preset Voltage; when the voltage of the battery in the target power supply circuit is greater than the preset voltage, the target power supply circuit is used as the first power supply circuit.
  • the embodiment of the present application includes two or more power supply circuits, each of which includes a battery, and the first battery is any one of a plurality of battery groups.
  • an embodiment of a switching system of a power supply circuit includes: a load; at least two power supply circuits, at least two power supply circuits are connected in parallel, and each power supply circuit is connected in series with the load Connecting, wherein each of the power supply circuits has the same circuit composition, each of the power supply circuits includes a battery, a first switch, wherein the first end of the first switch is coupled to the positive pole of the battery, and the second end of the first switch is coupled to the load The positive poles are coupled to provide power to the load by the battery in the power supply circuit when the first switch is closed.
  • first end of the first switch is coupled to the positive pole of the battery, the first end of the first switch being directly connected to the positive pole of the battery, or between the first end of the first switch and the positive pole of the battery Also connected to other devices, the first end of the first switch is indirectly connected to the positive pole of the battery, and similarly, the second end of the first switch is coupled to the positive pole of the load, the second end of the first switch and the positive pole of the load Directly connected, or the second end of the first switch is indirectly connected to the positive pole of the load.
  • the switching system of the power supply circuit in the embodiment of the present application may include two or more power supply circuits, each of which includes a battery and a first switch, wherein the first switch is disposed on the positive pole of the battery and the positive pole of the load. Between the first switch is closed, the load is charged by the power supply circuit.
  • the switching system of the power supply circuit of the embodiment of the present application can switch the power supply to the load by another power supply circuit when the battery power is insufficient in the power supply circuit that currently supplies power to the load, that is, realize switching of the plurality of power supply circuits.
  • the first switch of the other power supply circuit when the battery voltage for powering the load is less than the preset voltage, the first switch of the other power supply circuit is first controlled to be closed, so that another power supply circuit is used to supply power to the load, and then the original power supply is controlled.
  • the first switch of the circuit is disconnected, and the purpose of continuously supplying power to the load during battery switching is achieved, thereby realizing the technical effect of seamlessly switching the power supply to the load by using multiple sets of batteries, thereby solving the problem that the multi-cell battery cannot be seamlessly Switching to technical issues with load power.
  • the first switch of the other power supply circuit Since the first switch of the other power supply circuit is first closed when the power supply circuit is switched, the other power supply circuit is used to supply power to the load, and then the first switch of the original power supply circuit is turned off. Therefore, there is two-phase power supply. When the circuit supplies power to the load at the same time, the battery with high power is charged for the battery with low power, which may cause excessive current on the power supply line, heat generation and ignition of the power supply line.
  • a second switch and a diode are disposed in each power supply circuit, and the second switch is connected in parallel with the diode, and the first switch and the parallel The second switch and the diode are connected in series, wherein the anode of the diode is coupled to the anode of the battery, and the second end of the diode is coupled to the anode of the load.
  • the second switch in the current power supply circuit is first turned off, so that the current in the current power supply circuit can only flow forward, and then the first switch and the second switch of the other power supply circuit are controlled to be closed.
  • the other power supply circuit is used to supply power to the load, and finally the first switch and the second switch of the original power supply circuit are disconnected, thereby preventing the battery with high power from being powered by the battery with low power.
  • the second switch and the diode in the power supply circuit can adopt different connection manners.
  • An optional connection manner is: the first end of the second switch is connected to the second end of the first switch, and the second end of the second switch is Connected to the positive pole of the load, the positive pole of the diode is connected to the second end of the first switch, the negative pole of the diode is connected to the positive pole of the load, and the other optional connection mode is: the first end of the second switch and the battery The positive pole is connected, the second end of the second switch is connected to the first end of the first switch, the positive pole of the diode is connected to the positive pole of the battery, and the negative pole of the diode is connected to the first end of the first switch.
  • the initial current in the power supply circuit is higher due to the higher initial voltage of the battery in the power supply circuit. Big.
  • the current in the power supply line can be limited when the power supply circuit starts to supply power to the load.
  • a third switch and a pre-charge resistor are disposed in each power supply circuit, and the third switch and the pre-charge resistor are connected in parallel, and the first switch is connected in series with the third switch and the pre-charge resistor in parallel, wherein the pre-charge resistor The first end is coupled to the positive terminal of the battery, and the second end of the pre-charge resistor is coupled to the positive electrode of the load.
  • the third switch is first turned off to connect the pre-charge resistor to the power supply circuit, The current in the power supply circuit is limited to prevent damage to the circuit caused by excessive current.
  • the third switch is Closed to cancel the current limit in the power supply circuit.
  • the third switch and the pre-charge resistor in the power supply circuit can adopt different connection manners.
  • the second switch and the diode are connected as follows: the first end of the second switch is connected with the second end of the first switch, and the second switch The second end is connected to the positive pole of the load, the positive pole of the diode is connected to the second end of the first switch, and the negative pole of the diode is connected to the positive pole of the load.
  • An optional connection manner of the third switch and the pre-charge resistor is: the first end of the third switch is connected to the second end of the second switch, and the second end of the third switch is connected to the first end of the first switch The first end of the pre-charge resistor is connected to the second end of the second switch, and the second end of the pre-charge resistor is connected to the first end of the first switch.
  • Another optional connection method is: the first end of the third switch is connected to the positive pole of the battery, and the second end of the third switch is connected to the first end of the second switch, the first end of the pre-charge resistor is The positive pole of the battery is connected, and the second end of the pre-charge resistor is connected to the first end of the second switch.
  • Another optional connection method is: the first end of the third switch is connected to the first end of the first switch, the second end of the third switch is connected to the positive pole of the load, and the first end of the pre-charge resistor is The first end of the first switch is connected, and the second end of the pre-charge resistor is connected to the positive pole of the load.
  • the second switch and the diode are connected as follows: the first end of the second switch is connected to the positive pole of the battery, and the second end of the second switch is connected to the first end of the first switch, the positive pole of the diode and the positive pole of the battery Connected, the negative pole of the diode is connected to the first end of the first switch.
  • An optional connection manner of the third switch and the pre-charge resistor is: the first end of the third switch is connected to the second end of the first switch, and the second end of the third switch is connected to the first end of the second switch The first end of the pre-charge resistor is connected to the second end of the first switch, and the second end of the pre-charge resistor is connected to the first end of the second switch.
  • Another optional connection method is: the first end of the third switch is connected to the positive pole of the battery, and the second end of the third switch is connected to the first end of the first switch, the first end of the pre-charge resistor is The positive pole of the battery is connected, and the second end of the pre-charge resistor is connected to the first end of the first switch.
  • Another optional connection method is: the first end of the third switch is connected to the second end of the second switch, and the second end of the third switch is connected to the positive pole of the load, and the first end of the pre-charge resistor is The second end of the second switch is connected, and the second end of the pre-charge resistor is connected to the positive pole of the load.
  • a fourth switch may be disposed between the negative pole of the battery and the load in the power supply circuit, and when the first switch and the fourth switch are simultaneously closed, the power supply circuit charges the load.
  • the power supply circuit switching system includes: a load, a first power supply circuit, and a second power supply circuit, where A power supply circuit and a second power supply circuit are connected in parallel, and the first power supply circuit and the second power supply circuit are respectively connected in series with the load.
  • the first power supply circuit includes a battery 1, a switch 1 (corresponding to a second switch), a diode D1, a switch 2 (corresponding to a third switch), a resistor R1 (corresponding to a precharge resistor), and a switch 3 (corresponding to a first switch)
  • the switch 4 (corresponding to the fourth switch)
  • the second power supply circuit includes the battery 2, the switch 5 (corresponding to the second switch), the diode D2, the switch 6 (corresponding to the third switch), and the resistor R2 (corresponding to the pre-charge resistor) ), switch 7 (equivalent to the first switch), switch 8 (corresponding to the fourth switch), wherein the relay K1 controls the opening and closing of the switch 1, the relay K2 controls the opening and closing of the switch 2, and the relay K3 controls the switch With the opening and closing of the switch 4, the relay K4 controls the opening and closing of the switch 5, the relay K5 controls the opening and closing of the switch 6, and the relay K6 controls the opening and closing of the switch 7 and the switch 8.
  • FIG. 3 is a flowchart of a method for switching a power supply circuit according to an embodiment of the present application. The method is applicable to the switching system shown in FIG. 2. As shown in FIG. 3, the method includes the following steps:
  • step S301 it is determined whether the voltage of the battery 1 is greater than a set value (corresponding to a preset voltage).
  • step S302 if the voltage of the battery 1 is greater than the set value, the relay K1 and the relay K3 are engaged, and the relay K2 does not operate.
  • the control relay K1 and the relay K3 are closed, and the relay K2 does not operate.
  • the switch 1, the switch 3 and the switch 4 are closed.
  • the switch 2 is disconnected, and the first power supply circuit is used to supply power to the load.
  • the current in the first power supply circuit flows through the resistor R1, and the first power supply circuit is limited by the resistor R1 to prevent the initial current in the first power supply circuit from being excessive.
  • step S303 it is determined whether the load voltage is greater than 95% of the voltage of the battery 1.
  • the load voltage is obtained, and it is determined whether the ratio of the load voltage to the voltage of the battery 1 reaches a preset threshold of 95%.
  • step S304 if the load voltage is greater than 95% of the voltage of the battery 1, the relay K2 is pulled. If the ratio of the load voltage to the voltage of the battery 1 reaches 95% of the preset threshold, the control relay K2 is pulled in. At this time, the switch 2 is closed, and the resistor R1 is short-circuited, and the current limiting circuit is cancelled.
  • step S305 it is determined whether the voltage of the battery 1 is less than or equal to the battery undervoltage value.
  • Step S306 if the voltage of the battery 1 is less than or equal to the battery undervoltage value, it is determined whether the voltage of the battery 2 is greater than a set value. When it is judged that the voltage of the battery 1 is less than or equal to the battery undervoltage value, it indicates that the battery 1 has insufficient power. It is further determined whether the voltage of the battery 2 is greater than a set value.
  • step S307 if the voltage of the battery 2 is greater than the set value, the relay K1 is turned off. If the voltage of the battery 2 is greater than the set value, it is ready to switch to supply power to the load by the second power supply circuit.
  • the control relay K1 is first turned off, and at this time, the switch 1 is turned off, and the diode D1 is connected to the first power supply circuit, in the first power supply circuit. The current can only flow out of the positive electrode of the battery 1 and cannot flow to the positive electrode of the battery 1, preventing the battery 2 from charging the battery 1.
  • step S308 the relay K4 and the relay K6 are attracted.
  • the control relay K4 and the relay K6 are re-energized.
  • the switch 5 the switch 7 and the switch 8 are closed, and the second power supply circuit supplies power to the load.
  • the relay K5 does not operate, the switch 6 remains open, the current in the second power supply circuit flows through the resistor R2, and the second power supply circuit is limited by the resistor R2 to prevent the current in the second power supply circuit from being excessively large. The line caused damage.
  • step S309 it is judged whether the load voltage is greater than 95% of the voltage of the battery 2.
  • step S310 if the load voltage is greater than 95% of the voltage of the battery 2, the relay K5 is pulled. When the ratio of the load voltage to the voltage of the battery 2 reaches a preset threshold, the control relay K5 is pulled in. At this time, the switch 6 is closed, and the resistor R2 is short-circuited, and the current limiting of the second power supply circuit is cancelled.
  • step S311 the relay K2 and the relay K3 are turned off. Finally, the control relay K2 and the relay K3 are turned off. At this time, the switch 2, the switch 3 and the switch 4 are disconnected, and the first power supply circuit is stopped to supply power to the load.
  • an embodiment of a switching method of a power supply circuit is also provided.
  • the switching method of the power supply circuit can be used in the switching system of the power supply circuit. As shown in FIG. 4, the method includes the following steps:
  • Step S402 controlling the first switch of the first power supply circuit and the fourth switch of the first power supply circuit to be closed, wherein the first power supply circuit is any one of the at least two power supply circuits, and the voltage of the battery of the first power supply circuit is greater than the pre- Set voltage
  • Step S404 after the first switch of the first power supply circuit and the fourth switch of the first power supply circuit are closed, detecting the voltage of the battery of the first power supply circuit;
  • Step S406 when detecting that the voltage of the battery of the first power supply circuit is greater than the preset voltage, maintaining the first switch of the first power supply circuit and the fourth switch of the first power supply circuit are closed;
  • Step S408 when it is detected that the voltage of the battery of the first power supply circuit is less than or equal to the preset voltage, first controlling the first switch of the second power supply circuit and the fourth switch of the second power supply circuit to be closed, and then controlling the first power supply circuit.
  • the first switch is disconnected from the fourth switch of the first power supply circuit, wherein the second power supply circuit is any one of the at least two power supply circuits different from the first power supply circuit, and the voltage of the battery of the second power supply circuit is greater than Preset voltage.
  • the first power supply circuit is any one of two or more power supply circuits in the embodiment of the present application, and the second power supply circuit is different from the first two or more power supply circuits. Any one of the power supply circuits of the power supply circuit.
  • the first switch and the fourth switch in the first power supply circuit may be controlled to be closed, and the first battery is used to supply power to the load. In the process of supplying power to the load by using the first supply circuit, as the battery power is reduced, the voltage of the battery is continuously decreased.
  • the first switch and the fourth switch in the second supply circuit are first controlled to be closed, so that the second power supply circuit supplies power to the load, and the second power supply circuit is controlled. After the first switch and the fourth switch are closed, the first switch and the fourth switch of the first power supply circuit are controlled to be disconnected to stop the power supply to the load by the first power supply circuit, thereby achieving uninterrupted power supply to the load, that is, the battery Seamless switching.
  • the first switch of the second power supply circuit and the fourth switch of the second power supply circuit are first controlled to be closed, and then the first power supply circuit is controlled.
  • the first switch and the fourth switch of the first power supply circuit are disconnected, thereby achieving the purpose of continuously supplying power to the load during battery switching, thereby realizing the technical effect of using a plurality of sets of batteries to seamlessly switch the power supply to the load, thereby solving the problem.
  • the power supply circuit includes a second switch and a diode
  • the method further includes: controlling the second switch of the first power supply circuit to be closed; Before controlling the first switch of the second power supply circuit and the fourth switch of the second power supply circuit to be closed, the method further includes: controlling the second switch of the first power supply circuit to be turned off to block the first power supply circuit and the second power supply by using the diode Circuit.
  • the first switch of the second power supply circuit and the fourth switch of the second power supply circuit are first closed, and then the first switch of the first power supply circuit and the fourth switch of the first power supply circuit are controlled to be off. Therefore, there is a case where the first power supply circuit and the second power supply circuit simultaneously supply power to the load, thereby causing a situation in which the battery in the first power supply circuit of the second power supply circuit is charged, which may cause power supply The current on the line is too large, and the power supply line generates heat and sparks.
  • the second switch and the diode are disposed in the power supply circuit, and the second switch is connected in parallel with the diode,
  • the second switch in the first power supply circuit is first turned off, so that the current in the current power supply circuit can only flow from the positive pole to the negative pole of the diode, and then the first switch and the second power supply circuit are controlled.
  • the fourth switch of the second power supply circuit is closed to supply power to the load by using the second power supply circuit, and finally the first switch of the first power supply circuit and the fourth switch of the first power supply circuit are disconnected, thereby avoiding the second power supply circuit.
  • the battery is charged when the battery in the first power supply circuit is charged.
  • the power supply circuit includes a third switch and a pre-charge resistor.
  • the method further includes: controlling the third switch of the first power supply circuit Disconnecting; detecting whether the ratio of the voltage across the load to the voltage of the battery in the first power supply circuit reaches a preset threshold; when the ratio of the voltage across the load to the voltage of the battery in the first power supply circuit reaches a first threshold, the control is first The third switch of the power supply circuit is closed.
  • a third switch and a pre-charge resistor may be disposed in the power supply circuit, and the third switch is connected in parallel with the pre-charge resistor to control the first switch of the first power supply circuit and Before the fourth switch of the first power supply circuit is closed, the third switch is first turned off to limit the current in the first power supply circuit, and the ratio of the voltage across the load to the voltage of the battery in the first power supply circuit is pre- When the threshold is set, the third switch is controlled to be closed to cancel the current limit of the current in the first power supply circuit.
  • the method before controlling the first switch of the second power supply circuit and the fourth switch of the second power supply circuit to be closed, the method further includes: controlling the third switch of the second power supply circuit to be turned off; and controlling the second power supply circuit After the switch and the fourth switch of the second power supply circuit are closed, the method further includes: detecting whether the voltage between the voltage across the load and the voltage of the battery in the second power supply circuit reaches a preset threshold; and the voltage across the load and the second power supply circuit Controlling the third switch of the second power supply circuit to be closed when the voltage ratio of the battery reaches a preset threshold; controlling the first switch of the first power supply circuit and the first power supply circuit after controlling the third switch of the second power supply circuit to be closed The four switches are open.
  • the third switch can be controlled to be turned off when the power supply circuit is switched, to limit the current in the second power supply circuit through the pre-charge resistor, and to load two
  • the third switch is controlled to be closed, and the current limiting of the current in the second power supply circuit is cancelled.
  • an embodiment of the present application further provides a storage medium, where the storage medium includes a stored program, wherein, when the program is running, controlling a device in which the storage medium is located to perform the battery switching described above And the switching method of the power supply circuit.
  • an embodiment of the present application further provides a processor, where a processor is configured to run a program, wherein the method for performing battery switching and the method for switching a power supply circuit are executed when the program is running.
  • FIG. 5 is a schematic diagram of an optional battery switching device according to an embodiment of the present application. As shown in FIG. 5, the device includes:
  • the first power supply unit 510 is configured to supply power to the load by using the first battery in the first power supply circuit, wherein the first power supply circuit is any one of the plurality of power supply circuits, and the circuit composition of each of the power supply circuits is the same, the first battery The voltage is greater than the preset voltage;
  • the detecting unit 520 is configured to detect a voltage of the first battery during the power supply of the first battery to the load;
  • the second power supply unit 530 is configured to continue to use the first battery to supply power to the load when detecting that the voltage of the first battery is greater than the preset voltage;
  • the third power supply unit 540 is configured to first control the second battery in the second power supply circuit to supply power to the load when the voltage of the first battery is less than or equal to the preset voltage, and then control the first battery to stop supplying power to the load, where
  • the second power supply circuit is any one of the plurality of power supply circuits different from the first power supply circuit, and the voltage of the second battery is greater than the preset voltage.
  • the first battery is any one of the plurality of batteries in the embodiment of the present application.
  • the first battery may be used to supply power to the load.
  • the voltage of the first battery is continuously decreased.
  • the second battery is used to control the load, and the second battery is the other battery. Any one of the batteries having a voltage greater than the preset voltage is powered by the second battery. Then, the first battery is stopped to supply power to the load to realize uninterrupted power supply to the load, that is, seamless switching of the battery.
  • the first power supply unit is configured to supply power to the load by using the first battery in the first power supply circuit, wherein the first power supply circuit is any one of the plurality of power supply circuits, and each of the power supplies The circuit has the same circuit composition, the voltage of the first battery is greater than the preset voltage; the detecting unit is configured to detect the voltage of the first battery during the process of supplying power to the load by the first battery; and the second power supply unit is configured to detect When the voltage of the battery is greater than the preset voltage, the first battery continues to be used to supply power to the load; and the third power supply unit is configured to first control the second power supply circuit when detecting that the voltage of the first battery is less than or equal to the preset voltage.
  • the second battery supplies power to the load, and then controls the first battery to stop supplying power to the load.
  • the second power supply circuit is any one of the plurality of power supply circuits different from the first power supply circuit, and the voltage of the second battery is greater than the preset voltage.
  • the second battery is first controlled to supply power to the load, and then the first battery is controlled to load.
  • the electric power achieves the purpose of continuously supplying power to the load during battery switching, thereby realizing the technical effect of seamlessly switching the power supply to the load by using multiple sets of batteries, thereby solving the technology that cannot seamlessly switch to the load through multiple sets of batteries. problem.
  • the device further includes: a blocking unit, configured to supply the second battery to the load in the second power supply circuit Before the electricity is turned on, the second power supply circuit and the first power supply circuit are blocked to prevent the second power supply circuit from supplying power to the first power supply circuit.
  • a blocking unit configured to supply the second battery to the load in the second power supply circuit Before the electricity is turned on, the second power supply circuit and the first power supply circuit are blocked to prevent the second power supply circuit from supplying power to the first power supply circuit.
  • the second battery Since the voltage of the first battery is less than or equal to the preset voltage, the second battery is first controlled to supply power to the load, and then the first battery is stopped to supply power to the load. Therefore, the first battery and the second battery are simultaneously loaded.
  • the second battery with high power is charged for the first battery with low power, which may cause excessive current on the power supply line, heat generation and ignition of the power supply line.
  • the second is blocked first.
  • the power supply circuit and the first power supply circuit control the second battery to supply power to the load, thereby avoiding the second battery in the second charging circuit to the first charging circuit when the first battery and the second battery simultaneously supply power to the load The situation in which the first battery in the battery is charged.
  • the disclosed technical contents may be implemented in other manners.
  • the device embodiments described above are only schematic.
  • the division of the unit may be a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, unit or module, and may be electrical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. , including a number of instructions to make one
  • the computer device (which may be a personal computer, server or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like. .

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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)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un procédé et un appareil de commutation de batterie, ainsi qu'un système et un procédé de commutation pour un circuit d'alimentation électrique. Le procédé consiste à : fournir de l'énergie à une charge à l'aide d'une première batterie d'un premier circuit d'alimentation électrique, le premier circuit d'alimentation électrique étant l'un quelconque d'au moins deux circuits d'alimentation électrique, et la tension aux bornes de la première batterie est supérieure à une tension prédéfinie (S102) ; détecter la tension aux bornes la première batterie dans le processus d'alimentation en énergie de la charge par la première batterie (S104) ; continuer à fournir de l'énergie à la charge à l'aide de la première batterie lorsqu'il est détecté que la tension aux bornes de la première batterie est supérieure à la tension prédéfinie (S106) ; et lorsqu'il est détecté que la tension aux bornes de la première batterie est inférieure ou égale à la tension prédéfinie, commander tout d'abord une seconde batterie d'un second circuit d'alimentation électrique pour fournir de l'énergie à la charge, puis commander la première batterie pour arrêter de fournir de l'énergie à la charge (S108). Le procédé résout le problème technique selon lequel la charge ne peut pas être alimentée par commutation sans coupure entre une pluralité de batteries.
PCT/CN2017/113514 2017-04-17 2017-11-29 Procédé et appareil de commutation de batterie, et système et procédé de commutation pour circuit d'alimentation électrique WO2018192224A1 (fr)

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