WO2024001088A1 - Circuit de charge et de décharge, procédé de commande de charge et de décharge, et dispositif électronique - Google Patents

Circuit de charge et de décharge, procédé de commande de charge et de décharge, et dispositif électronique Download PDF

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Publication number
WO2024001088A1
WO2024001088A1 PCT/CN2022/140680 CN2022140680W WO2024001088A1 WO 2024001088 A1 WO2024001088 A1 WO 2024001088A1 CN 2022140680 W CN2022140680 W CN 2022140680W WO 2024001088 A1 WO2024001088 A1 WO 2024001088A1
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Prior art keywords
charging
battery
circuit
voltage
chip
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PCT/CN2022/140680
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English (en)
Chinese (zh)
Inventor
方俊伟
潘晓佳
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Oppo广东移动通信有限公司
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Publication of WO2024001088A1 publication Critical patent/WO2024001088A1/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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/446—Initial charging measures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Definitions

  • the present application relates to the field of charging and discharging technology, and in particular, to a charging and discharging circuit, a charging and discharging control method and an electronic device.
  • a charging and discharging circuit which may include:
  • a battery wherein the battery is a single-cell silicon anode battery
  • a first charging circuit connected to the battery, used to convert the received initial charging voltage into a first charging voltage required by the battery when the battery voltage of the battery is lower than a preset threshold.
  • a first discharge circuit is connected to the battery and the load unit respectively, and is used to boost the battery voltage and provide power to the load unit when the battery voltage of the battery is lower than a preset threshold; wherein , the first charging circuit is independent of the first discharging circuit.
  • a charge and discharge control method which may include:
  • the battery is a single-cell silicon negative electrode battery
  • the first charging circuit converts the received initial charging voltage into the first charging voltage required by the battery to charge the battery
  • the battery voltage When the battery voltage is lower than the preset threshold, the battery voltage is boosted and converted through the first discharge circuit and then supplied to the load unit; wherein the first charging circuit is independent of the first discharge circuit.
  • embodiments of the present application provide an electronic device, which includes the charging and discharging circuit as described in the first aspect.
  • Figure 1 is a schematic structural diagram of a charging and discharging circuit provided by an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of yet another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of yet another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of yet another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of yet another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of yet another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of yet another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 10 is a detailed structural schematic diagram of a charging and discharging circuit provided by an embodiment of the present application.
  • FIG 11 is a detailed structural schematic diagram of another charging and discharging circuit provided by an embodiment of the present application.
  • FIG. 12 is a detailed structural schematic diagram of another charging and discharging circuit provided by an embodiment of the present application.
  • Figure 13 is a schematic flow chart of a charge and discharge control method provided by an embodiment of the present application.
  • Figure 14 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • inventions of the present application provide a charging and discharging circuit.
  • the charging and discharging circuit includes:
  • a battery wherein the battery is a single-cell silicon anode battery
  • a first charging circuit connected to the battery, used to convert the received initial charging voltage into a first charging voltage required by the battery when the battery voltage of the battery is lower than a preset threshold.
  • a first discharge circuit is connected to the battery and the load unit respectively, and is used to boost the battery voltage and provide power to the load unit when the battery voltage of the battery is lower than a preset threshold; wherein , the first charging circuit is independent of the first discharging circuit.
  • the first discharge circuit includes a boost circuit, and one end of the boost circuit is connected to the load unit, and the other end of the boost circuit is connected to the battery;
  • the boost circuit is used to boost the battery voltage and convert the converted battery voltage when the battery voltage of the battery is lower than the preset threshold and the boost circuit is in a conductive state. Provide power to the load unit.
  • the first charging circuit includes a first charging chip, and one end of the first charging chip is used to receive the initial charging voltage, and the other end of the first charging chip is connected to the battery. ;
  • the first charging chip is used to convert the initial charging voltage to the desired voltage required by the battery when the battery voltage of the battery is lower than the preset threshold and the first charging chip is in a conductive state.
  • the first charging voltage is used to charge the battery.
  • the charging and discharging circuit further includes a second charging circuit and a second discharging circuit; wherein,
  • the second charging circuit is connected to the battery and is used to convert the received initial charging voltage into a second charging voltage required by the battery when the battery voltage of the battery is higher than a preset threshold.
  • the second discharge circuit is respectively connected to the battery and the load unit, and is used to provide the battery voltage to the load unit when the battery voltage of the battery is higher than a preset threshold.
  • the second charging circuit includes the first charging chip, and one end of the first charging chip is used to receive the initial charging voltage, and the other end of the first charging chip is connected to the first charging chip. battery connection;
  • the first charging chip is also used to convert the initial charging voltage into a voltage required by the battery when the battery voltage of the battery is higher than the preset threshold and the first charging chip is in a conductive state.
  • the second charging voltage charges the battery.
  • the second charging circuit includes the first charging chip and a first switching element, and one end of the first charging chip is used to receive the initial charging voltage. The other end is connected to one end of the first switching element, and the other end of the first switching element is connected to the battery;
  • the first charging chip is also used to convert the initial charging voltage when the battery voltage of the battery is higher than a preset threshold and both the first charging chip and the first switching element are in a conductive state.
  • the second charging voltage required by the battery is used to charge the battery.
  • the second discharging circuit includes the first charging chip, and one end of the first charging chip is connected to the load unit, and the other end of the first charging chip is connected to the battery. ;
  • the first charging chip is also used to provide the battery voltage to the load unit when the battery voltage of the battery is higher than the preset threshold and the first charging chip is in a conductive state.
  • the second discharge circuit includes the first charging chip and a first switching element, and one end of the first charging chip is connected to the load unit, and the other end of the first charging chip It is connected to one end of the first switching element, and the other end of the first switching element is connected to the battery;
  • the first charging chip is also used to change the battery voltage when the battery voltage of the battery is higher than the preset threshold and both the first charging chip and the first switching element are in a conductive state. Provide power to the load unit.
  • the load unit includes a first load unit and a second load unit, the first discharge circuit is connected to the first load unit, and the second discharge circuit is connected to the second load unit. connect;
  • the first discharge circuit is also used to boost the battery voltage and provide power to the first load unit when the battery voltage is lower than a preset threshold;
  • the second discharge circuit is also used to provide the battery voltage to the second load unit when the battery voltage is higher than a preset threshold.
  • the first discharging circuit includes a first charging chip and a boost circuit, and one end of the first charging chip is connected to the load unit, and the other end of the first charging chip is connected to the One end of the boost circuit is connected, and the other end of the boost circuit is connected to the battery;
  • the first charging chip is used to charge the battery through the boost circuit when the battery voltage of the battery is lower than the preset threshold and both the first charging chip and the boost circuit are in a conductive state. After the battery voltage is boosted and converted, the converted battery voltage is provided to the load unit.
  • the first charging circuit includes a second charging chip, and one end of the second charging chip is used to receive the initial charging voltage, and the other end of the second charging chip is connected to the battery. ;
  • the second charging chip is used to convert the initial charging voltage into the third voltage required by the battery when the battery voltage of the battery is lower than a preset threshold and the second charging chip is in a conductive state. A charging voltage to charge the battery.
  • the charging and discharging circuit further includes a third charging circuit, and the third charging circuit is connected to the battery;
  • the third charging circuit is configured to convert the received initial charging voltage into a third charging voltage required by the battery to charge the battery when the charging speed of the battery is higher than a preset speed threshold.
  • the third charging circuit includes a charge pump circuit and a second switching element, and one end of the second switching element is used to receive the initial charging voltage, and the other end of the second switching element is connected to One end of the charge pump circuit is connected, and the other end of the charge pump circuit is connected to the battery;
  • the charge pump circuit is used to convert the initial charging voltage to the predetermined speed threshold when the charging speed of the battery is higher than a preset speed threshold and both the charge pump circuit and the second switching element are in a conductive state.
  • the third charging voltage required by the battery is used to charge the battery.
  • the charge and discharge circuit also includes a detection module and a control module; wherein,
  • the detection module is used to perform voltage detection on the battery and determine the battery voltage
  • the control module is configured to control the first charging circuit to be in a working state when the battery voltage is lower than a preset threshold, and/or to control the first discharging circuit to be in a working state.
  • embodiments of the present application provide a charge and discharge control method, which method includes:
  • the battery is a single-cell silicon negative electrode battery
  • the first charging circuit converts the received initial charging voltage into the first charging voltage required by the battery to charge the battery
  • the battery voltage When the battery voltage is lower than the preset threshold, the battery voltage is boosted and converted through the first discharge circuit and then supplied to the load unit; wherein the first charging circuit is independent of the first discharge circuit.
  • the first discharging circuit includes a boost circuit
  • the method further includes:
  • the boost circuit When the battery voltage is lower than the preset threshold and the boost circuit is in a conductive state, the battery voltage is boosted and converted by the boost circuit, and the converted battery voltage is provided to the load unit. powered by.
  • the method further includes:
  • the battery voltage is higher than the preset threshold, the battery voltage is provided to the load unit through the second discharge circuit.
  • the load unit includes a first load unit and a second load unit, and the method further includes:
  • the battery voltage When the battery voltage is lower than the preset threshold, the battery voltage is boosted and converted through the first discharge circuit and then supplied to the first load unit;
  • the battery voltage is higher than the preset threshold, the battery voltage is provided to the second load unit through the second discharge circuit.
  • the method further includes:
  • the received initial charging voltage is converted into a third charging voltage required by the battery through the third charging circuit to charge the battery.
  • embodiments of the present application provide an electronic device, which includes the charging and discharging circuit as described in the first aspect.
  • Energy density that is, the amount of electricity that can be stored per unit weight or unit volume, is an important performance indicator of a battery.
  • the key to improving battery energy density lies in improving the positive and negative electrode materials, especially the negative electrode materials.
  • the commonly used positive electrode material of lithium-ion batteries is generally metal oxide, and the negative electrode material is graphite.
  • a lithium-ion battery whose negative electrode material is silicon (referred to as a "silicon negative electrode battery") is used as a power supply battery for electronic equipment.
  • the working voltage range of the graphite negative electrode can be 3.4V ⁇ 4.45V, and the working voltage range of the silicon negative electrode can be 2.5V ⁇ 4.45V or 3.0V ⁇ 4.45V. Therefore, the discharge cut-off voltage of graphite anode batteries is generally set to 3.4V, and the discharge cut-off voltage of silicon anode batteries can be set to any value between 2.5V and 3.0V.
  • single-cell silicon anode batteries have gradually become the first choice for improving the energy density of lithium-ion batteries in electronic devices.
  • Single-cell silicon anode batteries can reduce the battery's depth of discharge from 3.4V to 3.0V, or even to 2.5V, effectively increasing the energy density of the battery and achieving better battery capacity in the same space.
  • the shutdown protection voltage of electronic equipment is generally set to 3.4V to ensure the normal operation of electronic equipment.
  • silicon anode batteries In related technologies, there are also some charging and discharging schemes for silicon anode batteries. For example, silicon anode batteries and carbon anode batteries are connected in series to jointly supply power to the unit to be powered; or different charging rates are used to increase the silicon anode battery under each battery voltage. The charging efficiency of the negative battery is improved, and the large floating pressure generated by the internal resistance of the battery is avoided.
  • these solutions have some shortcomings.
  • the former is only used for dual-cell batteries, and requires that silicon anode batteries and carbon anode batteries must be connected in series, and is not suitable for single-cell silicon anode batteries; the latter is mainly used for During the charging stage, the discharge problem when the battery voltage is lower than 3.4V cannot be solved, that is, there is a problem that the load performance of some electronic devices deteriorates when the battery voltage is lower than 3.4V.
  • embodiments of the present application provide a charging and discharging circuit, which is applied to a single-cell silicon negative electrode battery and includes a charging and discharging scheme, which can achieve the following two characteristics: on the one hand, based on a boost circuit It ensures that the discharge voltage is always 3.4V and above, which solves the problem of poor load performance of some electronic devices when the battery voltage is lower than 3.4V; on the other hand, it can realize the discharge circuit and charging circuit when the battery voltage is lower than 3.4V The separation solves the problem of unstable working mode of the boost circuit caused by simultaneous charging and discharging under low voltage conditions.
  • FIG. 1 shows a schematic structural diagram of a charging and discharging circuit 10 provided in an embodiment of the present application.
  • the charging and discharging circuit 10 may include: a battery 11, a first charging circuit 12, a first discharging circuit 13 and a load unit 14; wherein,
  • Battery 11 wherein the battery is a single-cell silicon negative electrode battery
  • the first charging circuit 12 is connected to the battery 11 and is used to convert the received initial charging voltage into the first charging voltage required by the battery to charge the battery 11 when the battery voltage of the battery is lower than the preset threshold;
  • the first discharge circuit 13 is connected to the battery 11 and the load unit 14 respectively, and is used to boost the battery voltage and provide power to the load unit after the battery voltage is lower than the preset threshold; wherein, the first charging circuit 12 is independent of the first discharge circuit 13.
  • the battery 11 may be a single-cell silicon anode battery.
  • Silicon anode is a development direction to improve the energy density of lithium-ion batteries at the anode level.
  • the discharge curve of the silicon anode is different from that of the traditional graphite anode, lithium-ion batteries with silicon anodes are not suitable for direct application in existing electronic devices.
  • the shutdown protection voltage of electronic equipment is generally set to 3.4V to ensure the normal operation of the electronic equipment; that is to say, the preset threshold here can be set to 3.4V, but this is not specifically limited in the embodiment of this application.
  • the discharge cut-off voltage of a single-cell silicon anode battery is 2.5V to 3.0V, the power of a single-cell silicon anode battery cannot be effectively utilized.
  • the system of the electronic device in order to fully utilize the power of the silicon anode battery, can be adjusted, that is, the system software, circuits, etc. of the electronic device need to be improved so that the minimum operating voltage of the system is reduced, for example, to 3.0 V or even below; however, this requires changing the entire system architecture and adjusting the power supply system of electronic equipment, and the application cost is high.
  • the circuit structure of the charging and discharging circuit can also be adjusted. Specifically, a first discharge circuit 13 is provided in the charge and discharge circuit 10. When the battery voltage is lower than 3.4V, the battery voltage is boosted through the first discharge circuit 13 and provided to the system load for power supply; thus, not only can Silicon anode batteries can continue to power system loads when the battery voltage is lower than 3.4V, and can also solve the problem of poor load performance in some electronic devices when the battery voltage is lower than 3.4V.
  • the first discharge circuit 13 is independent of the first charging circuit 12, so that when the battery voltage is lower than 3.4V (ie, low voltage state), simultaneous charging and discharging in the low voltage state are solved. resulting in instability problems.
  • the first discharging circuit 13 may include a boost circuit 131 , and one end of the boost circuit 131 is connected to the load unit 14 . The other end of the circuit 131 is connected to the battery 11;
  • the boost circuit 131 is used to boost and convert the battery voltage when the battery voltage is lower than a preset threshold and the boost circuit is in a conductive state, and provide the converted battery voltage to the load unit 14 for power supply.
  • the boost circuit 131 may include at least one of the following: a boost conversion circuit, a boost-buck conversion circuit, and a boost/bypass conversion circuit.
  • the boost circuit 131 may also be a boost DC-DC circuit, a boost-buck DC-DC circuit, or a boost/bypass DC-DC circuit, etc., without any limitation here.
  • the buck-boost DC-DC circuit or the boost/bypass DC-DC circuit can also satisfy the step-up conversion of the battery voltage, the cost is higher than that of the step-up DC-DC circuit, so the boost in this embodiment
  • the circuit 131 can select a boost DC-DC circuit, that is, a boost conversion circuit (also referred to as a Boost circuit for short), to achieve boost conversion of the battery voltage.
  • the boost circuit 131 can be controlled to be on; if the battery voltage is higher than 3.4V, the boost circuit 131 can be controlled to be off. status, thereby ensuring that the discharge voltage of the battery 11 is always 3.4V or above, solving the problem that the load performance of some systems in electronic equipment deteriorates when the battery voltage is below 3.4V.
  • the first charging circuit 12 may include a first charging chip 121, and one end of the first charging chip 121 is used to receive the initial charging voltage. , the other end of the first charging chip 121 is connected to the battery 11;
  • the first charging chip 121 is used to convert the initial charging voltage into the first charging voltage required by the battery to charge the battery 11 when the battery voltage of the battery is lower than the preset threshold and the first charging chip is in the conductive state.
  • the first charging chip 121 can be the main charging chip (Main Charger IC), which is mainly used to convert the initial charging voltage into the first charging voltage required by the battery when the battery voltage is lower than 3.4V, so as to Charge battery 11.
  • Main Charger IC Main Charger IC
  • the charging and discharging circuit 10 may also include a charging interface (not shown in the figure), which is used to provide an initial charging voltage.
  • the initial charging voltage may be the DC bus voltage (VBUS) or the initial charging voltage provided by an external power supply.
  • the charging interface is connected to an external power supply, and the external power supply can be an adapter, a mobile power supply, a charger, a power bank, etc., without any limitation.
  • an overvoltage protection (Over Voltage Protection, OVP) circuit can be set after the charging interface. In this way, if the initial charging voltage exceeds the OVP threshold, the output of the overvoltage protection circuit will be turned off, thereby also protecting the device from damage due to excessive voltage.
  • OVP Over Voltage Protection
  • the battery voltage may not only be lower than the preset threshold, but also may be higher than the preset threshold. Therefore, in some embodiments, based on the charging and discharging circuit 10 shown in Figure 1, referring to Figure 3, the charging and discharging circuit 10 may also include a second charging circuit 15 and a second discharging circuit 16; wherein,
  • the second charging circuit 15 is connected to the battery 11 and is used to convert the received initial charging voltage into the second charging voltage required by the battery to charge the battery 11 when the battery voltage of the battery is higher than the preset threshold;
  • the second discharge circuit 16 is connected to the battery 11 and the load unit 14 respectively, and is used to provide the battery voltage to the load unit 14 when the battery voltage is higher than the preset threshold.
  • the second charging circuit 15 and the first charging circuit 12 can reuse the same charging path, that is, the second charging circuit 15 can reuse the first charging chip 121 in the first charging circuit 12 .
  • the second charging circuit 15 may include a first charging chip 121, and one end of the first charging chip 121 is used to receive the initial charging voltage. The other end of the charging chip 121 is connected to the battery 11;
  • the first charging chip 121 is also used to convert the initial charging voltage to the second charging voltage required by the battery to charge the battery 11 when the battery voltage of the battery is higher than the preset threshold and the first charging chip is in the conductive state.
  • the first charging circuit 12 corresponds to the charging path when the battery voltage is lower than the preset threshold
  • the second charging circuit 15 corresponds to the charging path when the battery voltage is higher than the preset threshold. That is, for any battery voltage, the initial charging voltage can be converted into the second charging voltage required by the battery through the first charging chip 121 in order to charge the battery 11 .
  • the second discharging circuit 16 can share the same path with the second charging circuit 15 , or it can be said that the second discharging circuit 16 can also reuse the third circuit in the first charging circuit 12 .
  • a charging chip 121 Specifically, based on the charging and discharging circuit 10 shown in FIG. 2 , referring to FIG. 4 , the second discharging circuit 16 may include a first charging chip 121 , and one end of the first charging chip 121 is connected to the load unit 14 . The other end of the chip 121 is connected to the battery 11;
  • the first charging chip 121 is also used to provide battery voltage to the load unit 14 when the battery voltage is higher than the preset threshold and the first charging chip is in a conductive state.
  • the first discharge circuit 13 corresponds to the discharge path when the battery voltage is lower than the preset threshold
  • the second discharge circuit 16 corresponds to the charging path when the battery voltage is higher than the preset threshold. That is, the discharge path in the low-voltage state is separated from the discharge path in the high-voltage state.
  • the boost circuit 131 can ensure that the discharge voltage is always 3.4V and above, which solves the problem of poor system load performance of some electronic devices when the battery voltage is below 3.4V.
  • the battery voltage is directly provided to the load unit 14 through the first charging chip 121 instead of discharging through the boost circuit 131, which can also increase the voltage above 3.4V. Discharge efficiency.
  • the second charging circuit 15 not only includes the first charging chip 131 but also includes a first switching element.
  • the second charging circuit 15 may include a first charging chip 121 and a first switching element 151, and one end of the first charging chip 121 is used to receive Initial charging voltage, the other end of the first charging chip 121 is connected to one end of the first switching element 151, and the other end of the first switching element 151 is connected to the battery 11;
  • the first charging chip 121 is also used to convert the initial charging voltage into the second charging required by the battery when the battery voltage of the battery is higher than the preset threshold and the first charging chip 121 and the first switching element 151 are both in the conductive state. voltage to charge the battery 11.
  • the first switching element 151 may be a metal-oxide semiconductor field-effect transistor (MOSFET or MOS transistor for short), but it may also be a switching transistor. , transistors, insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT) and other devices with switching functions, there are no restrictions here.
  • MOSFET metal-oxide semiconductor field-effect transistor
  • IGBT Insulated Gate Bipolar Transistor
  • the second discharging circuit 16 may share the same path with the second charging circuit 15, or it can be said that the second discharging circuit 16 may reuse the first path in the second charging circuit 15.
  • charging chip 121 and first switching element 151 may include a first charging chip 121 and a first switching element 151, and one end of the first charging chip 121 is connected to the load unit. 14 is connected, the other end of the first charging chip 121 is connected to one end of the first switching element 151, and the other end of the first switching element 151 is connected to the battery 11;
  • the first charging chip 121 is also used to provide battery voltage to the load unit 14 when the battery voltage is higher than the preset threshold and the first charging chip and the first switching element are both in a conductive state.
  • the boost circuit 131 needs to be controlled to be in the on state, and the first charging chip 121 and the first switching element 151 need to be in the off state.
  • the first charging circuit 12 may also include a first charging circuit at this time.
  • the chip 121 and the first switching element 151 that is, the first charging circuit 12 and the second charging circuit 15 share the same path. Therefore, for any battery voltage, the first charging chip 121 and the first switching element 151 can be controlled to be conductive. state to convert the initial charging voltage into the first charging voltage/second charging voltage required by the battery to charge the battery 11.
  • the first discharge circuit 13 is connected between the battery 11 and the load unit 14, and the first charging circuit 12, the second charging circuit 15 and the second discharging circuit 16 can share the same path.
  • the discharge voltage is always 3.4V and above, solving the problem that the battery voltage is lower than 3.4V.
  • the load performance of some electronic devices deteriorates.
  • the separation of the discharge circuit and the charging circuit can be realized when the battery voltage is lower than 3.4V, which solves the problem of simultaneous charging and discharging in a low voltage state causing the boost circuit to operate. Mode instability problem.
  • the first discharge circuit 13 and the second discharge circuit 13 in the embodiment of the present application may reuse the first charging chip 121.
  • the first discharge circuit 13 may include a first charging chip 121 and a boost circuit 131, and one end of the first charging chip 121 is connected to The load unit 14 is connected, the other end of the first charging chip 121 is connected to one end of the boost circuit 131, and the other end of the boost circuit 131 is connected to the battery 11;
  • the first charging chip 121 is used to perform boost conversion on the battery voltage through the boost circuit 131 when the battery voltage of the battery is lower than the preset threshold and both the first charging chip 121 and the boost circuit 131 are in a conductive state.
  • the converted battery voltage is provided to power the load unit 14 .
  • the first discharge circuit 13 and the second discharge circuit 16 reuse the first charging chip 121, mainly considering that when the battery voltage is lower than the preset threshold and the battery voltage is higher than the preset threshold, The control complexity when switching between these two situations.
  • the battery voltage can be directly supplied to the load unit 14 after being boosted and converted by the voltage boosting circuit 131, at this time the first discharging circuit (when the battery voltage is lower than the preset threshold) ) to the second discharge circuit (that is, when the battery voltage is higher than the preset threshold), both the first charging chip 121 and the first switching element 151 need to be controlled to be in a conductive (ie, open) state at the same time, so that the second discharge circuit can be turned on.
  • the second discharge circuit 16 and the control boost circuit 131 are in a shutdown (i.e.
  • the first discharging circuit 13 and the first charging circuit 12 need to be completely separated. Therefore, the embodiment of the present application can also introduce a second charging chip.
  • the first charging circuit 12 may include a second charging chip 122 , and one end of the second charging chip 122 is used to receive the initial charging voltage. , the other end of the second charging chip 122 is connected to the battery 11;
  • the second charging chip 122 is used to convert the initial charging voltage into the first charging voltage required by the battery to charge the battery 11 when the battery voltage of the battery is lower than the preset threshold and the second charging chip is in the conductive state.
  • the boost circuit 131 can also realize the separation of the discharge circuit and the charging circuit when the battery voltage is lower than 3.4V, solving the problem of unstable working mode of the boost circuit 131 caused by simultaneous charging and discharging in a low voltage state.
  • the first charging chip 121 can be a main charging chip (Main Charger IC)
  • the second charging chip 122 can be a auxiliary charging chip (Sub Charger IC)
  • the first switching element 151 It can be a MOS tube.
  • the boost circuit 131 is in a conductive state, that is, the voltage boost circuit 131 is discharged; and when the battery voltage is higher than 3.4V, the boost circuit 131 is turned off. state, the first switching element 151 is in a conductive state, that is, discharging is performed through the first switching element 151 instead of the boost circuit 131, which can also improve the discharging efficiency above 3.4V.
  • the first charging chip 121 can be used to charge the battery.
  • the embodiments of the present application can also control the first charging circuit 12 and the second charging circuit 15 to be in the working state at the same time. , that is, using the first charging chip 121 and the second charging chip 122 to charge the battery at the same time.
  • one end of the boost circuit 131 as shown in Figure 2, Figure 4 or Figure 5 can be connected to the load unit 14
  • the direct connection may also be an indirect connection between one end of the boost circuit 131 and the load unit 14 through the first charging chip 121 as shown in FIG. 6 .
  • the load unit 14 can also be divided into a first load unit and a second load unit; wherein the first load unit includes a load module with a load voltage higher than a preset threshold, and the second load unit includes a load module with a load voltage lower than a preset threshold. Load module with preset thresholds.
  • the load unit 14 includes a first load unit 141 and a second load unit 142, and the first discharge circuit 13 and the first load unit 141 is connected, the second discharge circuit 16 is connected to the second load unit 142;
  • the first discharge circuit 13 is also used to boost the battery voltage and provide power to the first load unit 141 when the battery voltage is lower than the preset threshold;
  • the second discharge circuit 16 is also used to provide the battery voltage to the second load unit 142 when the battery voltage is higher than the preset threshold.
  • the load unit 14 may include but is not limited to the following modules: processor module, keyboard module, display module, short message application module, address book application module, third-party application module, etc. .
  • the load units 14 can be divided into two broad categories: first load units 141 and second load units 142 .
  • first load units 141 is higher than 3.4V
  • second load units 142 is lower than 3.4V.
  • the load voltage is equal to 3.4V
  • it may belong to the first load unit 141 or the second load unit 142. This embodiment of the present application does not impose any limitation on this.
  • the first discharging circuit 13 may include a boost circuit 131
  • the second discharging circuit 16 may include a lower charging chip 121 .
  • the number of boost circuits 131 included here may be more than one. If there are more than two boost circuits 131 included, these boost circuits 131 are connected in parallel.
  • the first discharge circuit 13 is specifically used to boost the battery voltage through the boost circuit when the battery voltage is lower than the preset threshold, and The converted battery voltage is supplied to the first load unit 141; or, when the battery voltage is higher than the preset threshold, the battery voltage is bypass-converted through the boost circuit, and the converted battery voltage is provided to the first load.
  • Unit 141 supplies power. Therefore, the boost circuit 131 in this embodiment can select a boost/bypass DCDC circuit to implement boost conversion or bypass conversion of the battery voltage.
  • the first load unit 141 can be a part of the system load that requires a voltage above 3.4V
  • the second load unit 142 can be a voltage below 3.4V. voltage to other parts of the system load.
  • the boost circuit 131 can also be connected to only a part of the system loads that require a voltage above 3.4V. The remaining system loads are still directly powered by the battery 11 through the first charging chip 121 .
  • the boost circuit 131 if the battery voltage is lower than 3.4V, the boost circuit 131 is in the boost mode at this time, and needs to boost the battery voltage before transmitting it to some system loads that require voltages above 3.4V; If the battery voltage is higher than 3.4V, the boost circuit 131 is in the bypass mode at this time, and performs bypass conversion on the battery voltage before transmitting it to some system loads that require voltages above 3.4V.
  • the charge and discharge circuit 10 can also include a third charging circuit 17, and the third charging circuit 17 is connected to the battery. 11 connection;
  • the third charging circuit 17 is used to convert the received initial charging voltage into the third charging voltage required by the battery to charge the battery 11 when the charging speed of the battery is higher than the preset speed threshold.
  • the third charging circuit 17 may include a charge pump circuit 171 and a second switching element 172, and one end of the second switching element 172 is used to receive the initial charging voltage, and the second The other end of the switching element 172 is connected to one end of the charge pump circuit 171, and the other end of the charge pump circuit 171 is connected to the battery 11; wherein,
  • the charge pump circuit 171 is used to convert the initial charging voltage into the third charging voltage required by the battery to charge the battery 11 when both the charge pump circuit 171 and the second switching element 172 are in a conductive state.
  • the charge pump circuit 171 may be a charge pump (Charge pump).
  • the charge pump circuit 171 may be a 2:1 charging charge pump, where 2:1 refers to the ratio of the input voltage to the output voltage of the charging charge pump.
  • the second switching element 172 can be a MOS transistor, or a device with a switching function such as a switching transistor, a transistor, an IGBT, etc., and there is no limitation here.
  • the input end of the charging and discharging circuit 10 is connected to the adapter.
  • the charging speed of the adapter it can be divided into normal charging adapter and fast charging adapter, and the charging speed of the normal charging adapter is lower than the charging speed of the fast charging adapter.
  • the first charging circuit 12 and the second charging circuit 15 are used for normal charging of the battery 11 according to the normal charging adapter
  • the third charging circuit 17 is used for fast charging of the battery 11 according to the fast charging adapter.
  • the first charging circuit 12 is a charging circuit for a battery voltage lower than a preset threshold
  • the second charging circuit 15 is a charging circuit for a battery voltage higher than the preset threshold.
  • the charging and discharging circuit 10 may also include an application processing chip 18, and the application processing chip 18 may include a detection module 181 and a control module. 182; among them,
  • the detection module 181 is used to detect the voltage of the battery and determine the battery voltage
  • the control module 182 is used to control the first charging circuit 12 to be in the working state when the battery voltage is lower than the preset threshold, and/or to control the first discharging circuit 13 to be in the working state.
  • the application processing chip 18 may be an application processing chip in an electronic device, such as an application processor (Application Processor, AP).
  • the detection module 181 and the control module 182 may be integrated in the AP.
  • the detection module 181 is used to detect the battery voltage of the battery 11;
  • the control module 182 is used to control the first charging circuit 12 and/or the first discharging circuit 13 to be in the working state, and because the first charging circuit 12 and the first discharging circuit 13
  • the separation can also solve the problem of unstable working mode of the boost circuit caused by simultaneous charging and discharging under low voltage conditions.
  • control module 182 is also used to selectively turn on the first discharge circuit 13 or the second discharge circuit 16 according to the battery voltage. Specifically, taking the preset threshold value of 3.4V as an example, if the battery voltage is lower than 3.4V, that is, the battery voltage is in a low voltage state.
  • the first discharge circuit 13 can be controlled to be turned on, so that it is in a working state, and the battery voltage is After step-up conversion, power is provided to the load unit 14; otherwise, if the battery voltage is higher than 3.4V, that is, the battery voltage is in a high-voltage state, at this time, the second discharge circuit 16 can be controlled to be turned on, so that it is in a working state, and the battery voltage is Power is provided directly to the load unit 14.
  • the control module 182 is also used to selectively turn on the first charging circuit 12 or the second charging circuit 15 according to the battery voltage. Specifically, taking the preset threshold value of 3.4V as an example, if the battery voltage is lower than 3.4V, that is, the battery voltage is in a low-voltage state, at this time, the first charging circuit 12 can be controlled to be turned on, so that it is in a working state, and will receive The initial charging voltage is converted into the first charging voltage required by the battery to charge the battery 11; otherwise, if the battery voltage is higher than 3.4V, that is, the battery voltage is in a high-voltage state, at this time, the second charging circuit 15 can be controlled to be turned on to make it In the working state, the received initial charging voltage is converted into the second charging voltage required by the battery to charge the battery 11 .
  • the embodiment of the present application can also control the first charging circuit 12 and the second charging circuit 15 to be turned on at the same time, that is, the first charging circuit 12 and the second charging circuit 15 are used at the same time.
  • the charging chip 121 and the second charging chip 122 charge the battery.
  • the control module 182 can specifically control the boost circuit 131 in the first discharging circuit 13. If the boost circuit 131 is controlled to be turned on, it means that When the first discharging circuit 13 is in the working state; if the boost circuit 131 is controlled to be turned off, it means that the first discharging circuit 13 is in the non-working state.
  • the control module 182 can control the first charging chip 121.
  • the control module 182 controls the on or off of the first switching element 151, the second charging chip 122, the charge pump circuit 171, etc.; and the second switching element 172 To turn on or off, the charge pump circuit 171 provides a control signal.
  • the embodiments of the present application may be consistent with the execution action when the battery voltage is lower than the preset threshold, or It may also be consistent with the execution action when the battery voltage is higher than the preset threshold, and there is no limitation here.
  • the charging and discharging circuit 10 of the embodiment of the present application is a charging and discharging solution for a single-cell silicon anode battery based on a boost circuit.
  • this charge and discharge circuit 10 is oriented to a single-cell silicon anode battery and includes a charging and discharging scheme.
  • the discharge voltage of a single-cell silicon anode battery in a low-voltage state (below 3.4V) be increased to above 3.4V, ensuring the normal function and performance of all loads in electronic equipment; but a single cell can also be effectively utilized
  • the capacity density of silicon anode batteries is higher than that of conventional lithium-ion batteries.
  • the separation makes the boost circuit only work in the forward discharge mode, which solves the problem of unstable working mode of the boost circuit due to simultaneous charging and discharging under low voltage, thereby also improving the stability of the charging circuit and reducing the impact on other electronic equipment. Noise interference from the device.
  • the charging and discharging circuit includes: a battery, wherein the battery is a single-cell silicon negative electrode battery; a first charging circuit, connected to the battery, is used when the battery voltage of the battery is low. At the preset threshold, the received initial charging voltage is converted into the first charging voltage required by the battery to charge the battery; the first discharge circuit is connected to the battery and the load unit respectively, and is used when the battery voltage of the battery is lower than the predetermined value. When the threshold is set, the battery voltage is boosted and converted to provide power to the load unit; wherein, the first charging circuit is independent of the first discharging circuit.
  • the battery capacity can be increased and the battery life of the electronic device is increased; and by detecting the battery voltage, when the battery voltage is lower than 3.4V, the first discharge circuit is used to increase the battery voltage.
  • the load unit After voltage conversion, it is supplied to the load unit, which can increase the discharge voltage of the battery in the low-voltage state, thereby ensuring the performance of all loads in the electronic device; when the battery voltage is higher than 3.4V, the second discharge circuit is used to directly provide the battery voltage Powering the load unit can also improve the discharge efficiency above 3.4V; in addition, using the first charging circuit that is independent of the first discharging circuit to charge the battery can also realize the separation of the charging circuit and the discharging circuit in the low-voltage state, solving the problem of The instability problem caused by simultaneous charging and discharging under low voltage conditions can also improve the stability of the charging and discharging circuit.
  • FIG. 10 shows a detailed structural diagram of a charge and discharge circuit 10 provided by the embodiment of the present application.
  • the charging and discharging circuit 10 may include an overvoltage protection circuit 1001, a main charging chip 1002, an auxiliary charging chip 1003, a boost circuit 1004, a MOS tube 1005, a fast charging switch 1006, a charging charge pump 1007, and application processing. Chip 1008 and battery 1009.
  • the main charging chip 1002 is the first charging chip in the aforementioned embodiment
  • the auxiliary charging chip 1003 is the second charging chip in the aforementioned embodiment
  • the charging charge pump 1007 is the charge pump circuit in the aforementioned embodiment
  • the The charging charge pump can be a 2:1 charging charge pump
  • the application processing chip 1008 is the AP in the electronic device, which includes a detection module and a control module
  • the battery 1009 here is a single-cell silicon anode battery.
  • control signals of the boost circuit 1004 and the MOS transistor 1005 are provided by the control module in the application processing chip 1008, while the control signals of the fast charging switch 1006 are provided by the charging charge pump 1007.
  • control signals of the main charging chip 1002, the auxiliary charging chip 1003, and the charging charge pump 1007 are also provided by the control module in the application processing chip 1008 (not shown in the figure).
  • control signals and driving signals of the boost circuit 1004 and the MOS tube 1005 are provided by the control module in the application processing chip 1008, and the control of the main charging chip 1002, the auxiliary charging chip 1003, and the charging charge pump 1007 The signal is provided by the control module in the application processing chip 1008, but the driving signal is provided by itself.
  • the fast charge path can be marked with a bold solid line; the normal charge path when the battery voltage is less than 3.4V can be marked with a dotted line; the discharge path when the battery voltage is less than 3.4V can be marked with a solid line Mark; for the discharge path when the battery voltage is greater than 3.4V, it can be marked with long and short lines; for the normal charging path when the battery voltage is greater than 3.4V, it can be marked with dotted lines.
  • the discharge path and the charging path including the normal charge path and the fast charge path
  • the discharge path and the normal charge path are shared. Same path.
  • the input voltage may be VBUS and the system load voltage may be Vsys.
  • the output of the overvoltage protection circuit 1001 will be turned off, thereby protecting the device from damage due to excessive voltage.
  • the input current can not only power the system load but also charge the battery 1009 .
  • the battery 1009 can also power the system load at the same time.
  • the technical solution of this embodiment may include a main charging chip, an auxiliary charging chip, a boost circuit, a MOS tube, a charging charge pump, a detection module and a control module in the AP, and a single-cell silicon anode battery.
  • a main charging chip an auxiliary charging chip
  • a boost circuit a MOS tube
  • a charging charge pump a detection module and a control module in the AP
  • a single-cell silicon anode battery may include:
  • the boost circuit If the battery voltage is less than 3.4V, the boost circuit is turned on; if the battery voltage is greater than 3.4V, the boost circuit is turned off; thus ensuring that the discharge voltage is always 3.4V or above, solving the problem when the battery voltage is below 3.4V The problem of deterioration in load performance of some systems in electronic equipment;
  • Non-boost circuit discharge can improve the discharge efficiency above 3.4V;
  • the main charging chip turns off the charging function of the internal switch tube (such as the battery switch tube BATFET).
  • the internal switch tube such as the battery switch tube BATFET.
  • a charging charge pump is used, during normal charging, an auxiliary charging chip is used, and during discharging, a charge pump is used.
  • voltage circuit and main charging chip thus, the charging path and the low-voltage discharge path can be separated in the low-voltage state, so that the boost circuit only works in the forward discharge mode, which solves the problem of simultaneous charging and discharging in the low-voltage state that causes the boost circuit working mode to be inconsistent. stability issues;
  • the charge pump will still be used for fast charging, and the main charging chip will be used for normal charging.
  • you need to support 9V/2A charging you can also use the main charging chip and auxiliary charging at the same time. chip.
  • FIG. 11 shows a detailed structural schematic diagram of another charge and discharge circuit 10 provided by the embodiment of the present application.
  • the charging and discharging circuit 10 may include an overvoltage protection circuit 1101 , a main charging chip 1102 , a boost circuit 1103 , a fast charging switch 1104 , a charging charge pump 1105 , an application processing chip 1106 and a battery 1107 .
  • the main charging chip 1102 and the boost circuit 1103 the main charging chip 1102 is connected in series between the system load terminal and the battery, and the boost circuit 1103 is also directly connected in series between the system load terminal and the battery.
  • control signal of the boost circuit 1103 is provided by the control module in the application processing chip 1106, and the control signal of the fast charging switch 1104 is provided by the charging charge pump 1105.
  • control signals of the main charging chip 1102 and the charging charge pump 1105 are also provided by the control module in the application processing chip 1106 (not shown in the figure).
  • the fast charging path can be marked with a bold solid line; the normal charging path when the battery voltage is less than 3.4V can be marked with a dotted line; the discharge path when the battery voltage is less than 3.4V , can be marked with a solid line; for the discharge path when the battery voltage is greater than 3.4V, it can be marked with long and short lines; for the normal charging path when the battery voltage is greater than 3.4V, it can be marked with dotted lines. It can be seen from Figure 10 that when the battery voltage is less than 3.4V, the discharge path and the charging path (including the normal charge path and the fast charge path) are separated; when the battery voltage is greater than 3.4V, the discharge path and the normal charge path are multiplexed of.
  • the input voltage may be VBUS and the system load voltage may be Vsys.
  • the input voltage and input current can be provided by a dedicated charging port (Dedicated Charging Port, DCP), such as 5V/2A.
  • DCP Dedicated Charging Port
  • the output of the overvoltage protection circuit 1101 will be turned off, thereby protecting the device from damage due to excessive voltage.
  • the technical solution of this embodiment may include a main charging chip, a boost circuit, a charging charge pump, a detection module and a control module in the AP, and a single-cell silicon anode battery.
  • a main charging chip a boost circuit
  • a charging charge pump a detection module and a control module in the AP
  • a single-cell silicon anode battery a single-cell silicon anode battery.
  • it may include:
  • the boost circuit If the battery voltage is less than 3.4V, the boost circuit is turned on; if the battery voltage is greater than 3.4V, the boost circuit is turned off; thus ensuring that the discharge voltage is always 3.4V or above, solving the problem when the battery voltage is below 3.4V.
  • the embodiment of the present application is a charging and discharging solution for a single-cell silicon anode battery based on boost conversion.
  • This can include two sets of charging and discharging schemes (as shown in Figure 10 and Figure 11).
  • the two sets of charging and discharging schemes have the same point: when the battery voltage is less than 3.4V, a boost circuit is used to increase the discharge voltage to 3.4V ( It is called a low-voltage discharge path), and the low-voltage discharge path and the low-voltage charging path are separated, which solves the problem of unstable working mode of the boost circuit caused by simultaneous charging and discharging in a low-voltage state.
  • the charging and discharging scheme shown in Figure 10 requires the addition of an auxiliary charging chip and a MOS tube to achieve separation; while the charging and discharging scheme shown in Figure 11 requires the boost circuit The output is connected directly to the system load side for separation.
  • FIG. 12 shows a detailed structural diagram of yet another charging and discharging circuit 10 provided by an embodiment of the present application.
  • the charging and discharging circuit 10 may include an overvoltage protection circuit 1201, a main charging chip 1202, a boost/bypass circuit 1203, a fast charging switch 1204, a charging charge pump 1205, an application processing chip 1206 and a battery 1207.
  • the boost/bypass circuit 1203 is connected in series between the power supply load terminal above 3.4V and the battery, and the main charging chip 1202 is connected in series between the power supply and the battery. Between V and above the system load terminal other than the powered load and the battery.
  • control signal of the boost/bypass circuit 1203 is provided by the control module in the application processing chip 1206, and the control signal of the fast charging switch 1204 is provided by the charging charge pump 1205.
  • control signals of the main charging chip 1202 and the charging charge pump 1205 are also provided by the control module in the application processing chip 1206 (not shown in the figure).
  • the boost circuit used in Figures 10 and 11 is a boost DC-DC circuit; alternatively, a boost-buck DC-DC circuit or a boost/bypass DC-DC circuit can be used.
  • the functions of the step-up and step-down DC-DC circuit and the step-up/bypass DC-DC circuit are consistent with the step-up DC-DC circuit used in this application, but the cost is higher than the step-up DC-DC circuit used in this application.
  • the boost/bypass circuit 1103 is a boost/bypass DC-DC circuit.
  • the boost/bypass circuit 1103 when the battery voltage is less than 3.4V, the boost/bypass circuit 1103 is in the boost mode, and the battery voltage is boosted and converted; when the battery voltage is greater than 3.4V, the boost/bypass circuit 1103 is in the bypass mode. In bypass mode, the battery voltage is bypassed.
  • boost/bypass circuit 1103 considering the power supply capability of a single boost/bypass circuit 1103, if there are many power supply loads above 3.4V, then N boost/bypass circuits can be used here.
  • N is an integer greater than or equal to 1.
  • the boost circuit shown in Figure 11 can also be considered to be connected to only some system loads that require a voltage above 3.4V, and the remaining system loads are still directly powered by the battery.
  • Figure 12 shows a schematic in which the output of the boost/bypass circuit is only connected to part of the system load that requires a voltage above 3.4V, while the remaining part of the system load is still directly powered by the battery.
  • the embodiment of the present application provides a charging and discharging circuit.
  • This embodiment elaborates on the specific implementation of the foregoing embodiment.
  • the low voltage state ( ⁇ 3.4 The discharge voltage of V)'s single-cell silicon anode battery is increased to above 3.4V, which can ensure the normal function and performance of all loads in electronic equipment, and effectively utilize the higher capacity density characteristics of single-cell silicon anode batteries than conventional lithium-ion batteries.
  • achieving higher battery capacity while maintaining the same volume bringing a better battery life experience to users of electronic devices; in addition, it can also realize the separation of low-voltage charging path and low-voltage discharging path, so that the boost circuit only works in the normal state.
  • the forward discharge mode solves the problem of unstable working mode of the boost circuit caused by simultaneous charging and discharging under low voltage conditions, thereby improving the stability of the charging circuit and reducing noise interference to other devices in electronic equipment.
  • FIG. 13 shows a schematic flowchart of a charge and discharge control method provided by the embodiment of the present application. As shown in Figure 13, the method may include:
  • the first charging circuit converts the received initial charging voltage into the first charging voltage required by the battery to charge the battery.
  • the battery is a single-cell silicon anode battery.
  • the system of the electronic device in order to fully utilize the power of the silicon anode battery, the system of the electronic device can be adjusted, that is, the system software, circuits, etc. of the electronic device need to be improved so that the minimum operating voltage of the system is reduced, for example, to 3.0 V or even below; however, this requires changing the entire system architecture and adjusting the power supply system of electronic equipment, and the application cost is high.
  • the circuit structure of the charging and discharging circuit can also be adjusted. Specifically, a first discharge circuit is provided in the charge and discharge circuit. When the battery voltage is lower than 3.4V, the battery voltage is boosted through the first discharge circuit and provided to the system load for power supply; thus, not only can the silicon anode battery be It can continue to supply power to the system load when the battery voltage is lower than 3.4V, and it can also solve the problem of poor performance of some loads in electronic equipment when the battery voltage is lower than 3.4V.
  • the first discharging circuit is independent of the first charging circuit, so that when the battery voltage is lower than 3.4V (ie, low voltage state ), it solves the instability problem caused by simultaneous charging and discharging under low voltage conditions.
  • the charging and discharging circuit may also include a detection module and a control module.
  • the method may further include:
  • control module controls the first charging circuit to be in a working state, and/or controls the first discharging circuit to be in a working state.
  • the first charging circuit may include a first charging chip.
  • converting the received initial charging voltage into the first charging voltage required by the battery through the first charging circuit to charge the battery may include:
  • the first charging chip converts the initial charging voltage into the first charging voltage required by the battery to charge the battery.
  • the first discharge circuit may include a boost circuit.
  • the battery voltage is boosted and converted through the first discharge circuit to provide power to the load unit, which may include:
  • the boost circuit When the battery voltage of the battery is lower than the preset threshold and the boost circuit is in a conductive state, the battery voltage is boosted and converted by the boost circuit, and the converted battery voltage is provided to the load unit.
  • the charging and discharging circuit may also include a second charging circuit and a second discharging circuit.
  • the method may further include:
  • the received initial charging voltage is converted into the second charging voltage required by the battery through the second charging circuit to charge the battery;
  • the battery voltage of the battery is higher than the preset threshold, the battery voltage is provided to the load unit through the second discharge circuit.
  • the second charging circuit may include the first charging chip, and the second discharging circuit may also include the first charging chip.
  • the second charging circuit, the second discharging circuit and the first charging circuit are shared. same path.
  • the method may further include:
  • the first charging chip converts the initial charging voltage into the second charging voltage required by the battery to charge the battery;
  • the battery voltage of the battery is higher than the preset threshold and the first charging chip is in a conductive state, the battery voltage is provided to the load unit through the first charging chip.
  • the second charging circuit may include a first charging chip and a first switching element
  • the second discharging circuit may also include a first charging chip and a first switching element.
  • the second charging circuit, The second discharging circuit and the first charging circuit share the same path.
  • the method may further include:
  • the initial charging voltage is converted into the second charging voltage required by the battery through the first charging chip and the first switching element. , to charge the battery; or,
  • the battery voltage of the battery is higher than the preset threshold and both the first charging chip and the first switching element are in a conductive state, the battery voltage is provided to the load unit through the first charging chip and the first switching element.
  • the load unit may include a first load unit and a second load unit.
  • the method may further include:
  • the battery voltage When the battery voltage is lower than the preset threshold, the battery voltage is boosted and converted through the first discharge circuit and then supplied to the first load unit;
  • the battery voltage is higher than the preset threshold, the battery voltage is provided to the second load unit through the second discharge circuit.
  • the first discharging circuit may include a first charging chip and a boost circuit.
  • the first charging circuit may include a second charging chip to realize the integration of the first discharging circuit and the first charging circuit. separation.
  • the method may also include:
  • the second charging chip converts the initial charging voltage into the first charging voltage required by the battery to charge the battery.
  • the charging and discharging circuit may also include a third charging circuit.
  • the method may further include:
  • the received initial charging voltage is converted into a third charging voltage required by the battery through the third charging circuit to charge the battery.
  • the embodiment of the present application provides a charge and discharge control method, which is a charge and discharge scheme for a single-cell silicon anode battery based on a boost circuit.
  • this method is oriented to single-cell silicon anode batteries and includes charging and discharging schemes.
  • the discharge voltage of a single-cell silicon negative electrode battery in a low-voltage state (below 3.4V) be increased to above 3.4V, ensuring the normal function and performance of all loads in electronic equipment; it can also effectively utilize the single-cell silicon
  • the negative electrode battery has higher capacity density characteristics than conventional lithium-ion batteries, achieving higher battery capacity while maintaining the same volume, providing users with a better battery life experience.
  • FIG. 14 shows a schematic structural diagram of an electronic device 140 provided by an embodiment of the present application.
  • the electronic device 140 may include the charge and discharge circuit 10 as described in any of the previous embodiments.
  • the electronic device 140 may also be called a "communication terminal", “intelligent terminal” or “terminal”.
  • the electronic device 140 include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; may include radiotelephones, pagers, Internet/Intranet access, Web browser, planner, calendar, and/or Personal Digital Assistant (PDA); and conventional laptop, palmtop, or other electronic device including a radiotelephone transceiver.
  • PCS personal communication system
  • PDA Personal Digital Assistant
  • the electronic devices may also include but are not limited to smartphones, e-book readers, smart wearable devices, mobile power supplies (such as power banks, travel chargers), wireless mice, wireless keyboards, wireless headsets, Bluetooth speakers, etc. with charging functions. Rechargeable equipment, there is no specific limit on this here.
  • the electronic device 140 includes the charging and discharging circuit described in the previous embodiment.
  • This charging and discharging circuit is oriented to single-cell silicon negative electrode batteries and includes charging and discharging solutions. In this way, based on the single-cell silicon anode battery, the battery capacity can be increased and the battery life of the electronic device is increased; and by detecting the battery voltage, when the battery voltage is lower than 3.4V, the first discharge circuit is used to increase the battery voltage.
  • the load unit After voltage conversion, it is supplied to the load unit, which can increase the discharge voltage of the battery in the low-voltage state, thereby ensuring the performance of all loads in the electronic device; when the battery voltage is higher than 3.4V, the second discharge circuit is used to directly provide the battery voltage Supplying power to the load unit, it can also improve the discharge efficiency above 3.4V; in addition, according to this charge and discharge circuit, the charging path and the discharging path can also be separated in the low voltage state, which solves the problem of voltage rise caused by simultaneous charging and discharging in the low voltage state.
  • the DC-DC working mode of the circuit is unstable.
  • the charging and discharging circuit includes: a battery, wherein the battery is a single-cell silicon negative electrode battery; a first charging circuit, connected to the battery, is used to receive a signal when the battery voltage of the battery is lower than a preset threshold. The initial charging voltage is converted into the first charging voltage required by the battery to charge the battery; the first discharge circuit is connected to the battery and the load unit respectively, and is used to increase the battery voltage when the battery voltage is lower than the preset threshold. After voltage conversion, power is provided to the load unit; wherein, the first charging circuit is independent of the first discharging circuit.
  • the battery capacity can be increased and the battery life of the electronic device is increased; and by detecting the battery voltage, when the battery voltage is lower than the preset threshold (that is, in a low-voltage state), the first The discharge circuit boosts the battery voltage and supplies power to the load unit, which can increase the discharge voltage of the battery in a low-voltage state, thereby ensuring the performance of all loads in the electronic device; and using a first charging circuit that is independent of the first discharge circuit Charging the battery can also realize the separation of the charging circuit and the discharging circuit in the low-voltage state, solving the instability problem caused by simultaneous charging and discharging in the low-voltage state, thereby improving the stability of the charging and discharging circuit.

Abstract

Les modes de réalisation de la présente divulgation concernent un circuit de charge et de décharge, un procédé de commande de charge et de décharge, ainsi qu'un dispositif électronique. Le circuit de charge et de décharge comprend : une batterie, qui est une batterie d'électrode négative en silicium à élément unique ; un premier circuit de charge, qui est connecté à la batterie, et est utilisé pour : lorsqu'une tension de batterie de la batterie est inférieure à une valeur de seuil prédéfinie, convertir une tension de charge initiale reçue en une première tension de charge, qui est requise par la batterie, de façon à charger la batterie ; et un premier circuit de décharge, qui est respectivement connecté à la batterie et à une unité de charge, et est utilisé pour : lorsque la tension de batterie de la batterie est inférieure à la valeur de seuil prédéfinie, effectuer une conversion d'amplification sur la tension de batterie puis la fournir à l'unité de charge, de façon à fournir de l'énergie à l'unité de charge, le premier circuit de charge étant indépendant du premier circuit de décharge. De cette manière, le problème d'instabilité provoqué par la charge et la décharge simultanées dans un état basse tension peut être résolu à l'aide du circuit de charge et de décharge.
PCT/CN2022/140680 2022-06-28 2022-12-21 Circuit de charge et de décharge, procédé de commande de charge et de décharge, et dispositif électronique WO2024001088A1 (fr)

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CN115051441A (zh) * 2022-06-28 2022-09-13 Oppo广东移动通信有限公司 充放电电路、充放电控制方法及电子设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009136124A (ja) * 2007-12-03 2009-06-18 Nippon Telegr & Teleph Corp <Ntt> バックアップ電源およびその制御方法
CN113078699A (zh) * 2020-01-03 2021-07-06 华为技术有限公司 一种终端及其供电方法、充放电管理电路
CN113273049A (zh) * 2019-03-22 2021-08-17 Oppo广东移动通信有限公司 供电装置、方法及电子设备
CN214479704U (zh) * 2021-02-19 2021-10-22 Oppo广东移动通信有限公司 供电装置和电子设备
CN115051441A (zh) * 2022-06-28 2022-09-13 Oppo广东移动通信有限公司 充放电电路、充放电控制方法及电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009136124A (ja) * 2007-12-03 2009-06-18 Nippon Telegr & Teleph Corp <Ntt> バックアップ電源およびその制御方法
CN113273049A (zh) * 2019-03-22 2021-08-17 Oppo广东移动通信有限公司 供电装置、方法及电子设备
CN113078699A (zh) * 2020-01-03 2021-07-06 华为技术有限公司 一种终端及其供电方法、充放电管理电路
CN214479704U (zh) * 2021-02-19 2021-10-22 Oppo广东移动通信有限公司 供电装置和电子设备
CN115051441A (zh) * 2022-06-28 2022-09-13 Oppo广东移动通信有限公司 充放电电路、充放电控制方法及电子设备

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