Dual battery circuit and control method thereof, and electronic equipment

Abstract

The present disclosure relates to a dual-battery circuit and a control method thereof, and an electronic device. The dual-battery circuit includes a first battery; a second battery is connected in parallel with the first battery, a first switch unit controls the on-off of the current path of the first battery, a second switch unit controls the on-off of the current path of the second battery, and a control unit is connected to the first detection unit and the second detection unit respectively; the control unit is used to control the first battery and the second battery to supply power to the outside in parallel when the voltage of the first battery is equal to the voltage of the second battery; since the first battery and the second battery are arranged in parallel and can supply power to other electronic devices in parallel, there is no need to set up a step-down circuit additionally, saving costs. At the same time, since the two batteries will supply power to the outside in parallel only when the voltages of the first battery and the second battery are the same, the problem of instantaneous large current is avoided, the service life of the first battery and the second battery is extended, and the safety and reliability of battery use are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a dual-battery circuit and a control method thereof, and an electronic device. Background Art

[0002] With the development of the times, electronic devices such as mobile phones and tablet computers have become indispensable items in people's lives, and the functions of electronic devices are constantly increasing to meet the needs of users. For example, electronic devices have navigation functions, shooting functions, games or multimedia functions, etc. However, electronic devices with multiple functions will increase the consumption of their internal battery power, shorten the standby time of electronic devices, and affect the user experience.

[0003] Foldable screen mobile phones have become the mainstream trend of future mobile phone development. Foldable screen mobile phones have a larger display area and consume more power. At the same time, since foldable screen mobile phones need to be folded frequently, higher requirements are placed on the battery and related circuits of the mobile phone. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a dual battery circuit and a control method thereof, and an electronic device.

[0005] According to a first aspect of an embodiment of the present disclosure, a dual battery circuit is provided, which is applied to an electronic device, and the dual battery circuit includes:

[0006] First battery;

[0007] a second battery, connected in parallel with the first battery;

[0008] a first switch unit, comprising a first low-voltage switch unit and a first high-voltage switch unit, wherein the first low-voltage switch unit is connected to the first battery through the first high-voltage switch unit, and the first low-voltage switch unit and the first high-voltage switch unit jointly control the on-off of a current path of the first battery;

[0009] A second switch unit, comprising a second low-voltage switch unit and a second high-voltage switch unit, wherein the second low-voltage switch unit is connected to the second battery through the second high-voltage switch unit, and the second low-voltage switch unit and the second high-voltage switch unit jointly control the on-off of the current path of the second battery;

[0010] a first detection unit, connected to the first battery, and configured to detect a voltage of the first battery;

[0011] a second detection unit, connected to the second battery, and configured to detect a voltage of the second battery;

[0012] a control unit, connected to the first low-voltage switch unit and the second low-voltage switch unit respectively, and further connected to the first detection unit and the second detection unit respectively;

[0013] The control unit is used to control the first battery and the second battery to supply power to the outside in parallel when the voltage of the first battery is equal to the voltage of the second battery.

[0014] Optionally, the first battery includes a first chip, a first battery body and a first battery switch, the first chip is connected to the first battery body through the first battery switch, and the first high-voltage switch unit is connected to the first chip;

[0015] The second battery includes a second chip, a second battery body and a second battery switch. The second chip is connected to the second battery body through the second battery switch, and the second high-voltage switch unit is connected to the second chip.

[0016] Optionally, the first detection unit and the second detection unit are electrically connected to the control unit via an Inter-Integrated Circuit bus respectively.

[0017] According to a second aspect of an embodiment of the present disclosure, a control method for a dual-battery circuit is provided, for controlling the dual-battery circuit as described above, the control method comprising:

[0018] respectively obtaining current voltage values ​​of the first battery and the second battery;

[0019] When the current voltage value of the first battery is equal to the current voltage value of the second battery, the first battery and the second battery are controlled to supply power to the outside in parallel.

[0020] Optionally, the control method further includes:

[0021] The dual battery circuit obtains the current voltage values ​​of the first battery and the second battery respectively when the dual battery circuit is in a charging state;

[0022] When the current voltage value of the first battery reaches a preset value and the current voltage value of the second battery does not reach the preset value, the first switch unit is controlled to be opened to disconnect the current path of the first battery, and the second switch unit is controlled to remain closed to conduct the current path of the second battery; or,

[0023] When the current voltage value of the first battery does not reach the preset value and the current voltage value of the second battery reaches the preset value, the first switch unit is controlled to remain closed to conduct the current path of the first battery, and the second switch unit is controlled to be opened to disconnect the current path of the second battery.

[0024] Optionally, the control method further includes:

[0025] In the dual battery circuit, when the first switch unit is disconnected and the second switch unit is closed, if the current voltage value of the second battery reaches the preset value, the first switch unit is controlled to be closed, and the first battery and the second battery are connected in parallel to supply power to the outside; or,

[0026] When the dual battery circuit is in a charging state, when the first switch unit is closed and the second switch unit is open, if the current voltage value of the first battery reaches the preset value, the second switch unit is controlled to be closed, and the first battery and the second battery are connected in parallel to supply power to the outside.

[0027] Optionally, the control method further includes:

[0028] When the dual battery circuit switches from the external power supply state to the charging state, the first switch unit and the second switch unit are controlled to be closed simultaneously to charge the first battery and the second battery.

[0029] Optionally, the control method further includes:

[0030] When the dual battery circuit switches from the charging state to the external power supply state, the first switch unit and the second switch unit are controlled to be closed at the same time, and the first battery and the second battery supply power to the outside in parallel.

[0031] Optionally, the control method further includes:

[0032] Controlling the first switch unit to close includes:

[0033] Outputting first preset level information to the first low voltage switch unit;

[0034] Controlling the second switch unit to close includes:

[0035] The first preset level information is output to the second low voltage switch unit.

[0036] Optionally, the dual battery circuit is in a charging state,

[0037] Controlling the first switch unit to disconnect includes:

[0038] Outputting second preset level information to the first low voltage switch unit;

[0039] Controlling the second switch unit to disconnect, comprising:

[0040] The second preset level information is output to the second low voltage switch unit.

[0041] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, comprising the dual battery circuit as described above.

[0042] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: since the first battery and the second battery are arranged in parallel and can supply power to other electronic devices in parallel, there is no need to set up an additional step-down circuit, thus saving costs. At the same time, since the two batteries will supply power to the outside in parallel only when the voltages of the first battery and the second battery are the same, the problem of instantaneous high current is avoided, the service life of the first battery and the second battery is extended, and the safety and reliability of battery use are improved.

[0043] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0045] Figure 1 is a structural block diagram of a dual battery circuit according to an exemplary embodiment.

[0046] Figure 2 is a schematic diagram of a control system of a dual battery circuit according to an exemplary embodiment.

[0047] Figure 3 is a block diagram of a dual battery circuit according to an exemplary embodiment.

[0048] Figure 4 is a block diagram of a dual battery circuit according to another exemplary embodiment.

[0049] Figure 5 is a block diagram of a dual battery circuit according to another exemplary embodiment.

[0050] Figure 6 is a block diagram of a dual battery circuit according to another exemplary embodiment.

[0051] Figure 7 is a block diagram of a dual battery circuit according to another exemplary embodiment. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0053] Foldable screen mobile phones have become the mainstream trend of future mobile phone development. Foldable screen mobile phones have a larger display area and consume more power. At the same time, since foldable screen mobile phones need to be folded frequently, higher requirements are placed on the battery and related circuits of the mobile phone. In order to increase the overall power of the battery and make full use of the stacking space of foldable screen mobile phones, dual battery solutions came into being.

[0054] In the related art, the dual-battery power supply method of electronic devices usually uses two batteries connected in series to power the electronic devices. When the battery needs to be charged, the system charges the batteries connected in series; when the battery needs to be discharged, the two batteries are stepped down by a step-down circuit to power the system. When the batteries connected in series are used to power electronic devices, a special step-down circuit is required to step down the voltage during the discharge process, which not only complicates the system and increases the manufacturing cost, but also generates additional power consumption during the operation of the step-down circuit, causing the battery to heat up and lose battery power.

[0055] The present disclosure proposes a dual-battery circuit for use in electronic devices. The electronic device may be, for example, an electronic product with its own battery, such as a mobile phone or a tablet computer. The present application takes a mobile phone with a folding screen as an example. The dual-battery circuit includes a first battery and a second battery. The second battery is connected in parallel with the first battery. There is no need to set a step-down circuit, which reduces the complexity of the dual-battery circuit system and effectively reduces the manufacturing cost. Compared with the dual-battery system in series connection in the related art, the step-down circuit is reduced and the complexity of the circuit is reduced. At the same time, it can also reduce battery heating and extend the service life of the electronic device. The dual-battery circuit also includes a first switch unit and a second switch unit. Only when the voltages of the first battery and the second battery are the same, the two batteries will supply power to the outside in parallel, avoiding the phenomenon of instantaneous excessive current due to the different voltages of the first battery and the second battery, affecting the life of the first battery and the second battery, and improving the safety and reliability of the dual-battery circuit.

[0056] In an exemplary embodiment, Figure 1As shown, the dual battery circuit includes a first battery 1 and a second battery 2. The first battery 1 and the second battery 2 are connected in parallel to supply power to the electronic device, thereby reducing the complexity of the entire dual battery circuit and making the charging and discharging processes of the entire electronic device simpler and more convenient. The dual battery circuit also includes a first switch unit 3, a second switch unit 4 and a control unit 7. The control unit 7 is connected to the first switch unit 3 and the second switch unit 4, respectively. The first switch unit 3 and the second switch unit 4 are used to protect the dual battery circuit. By controlling the opening and closing of the first switch unit 3 and the second switch unit 4, the first battery 1 and the second battery 2 are controlled to supply power in parallel only when the voltage values ​​of the first battery 1 and the second battery 2 are equal, so as to avoid the phenomenon of instantaneous excessive current in the first battery 1 and the second battery 2 after being connected in parallel during the discharge process, thereby affecting the life of the first battery 1 and the second battery 2.

[0057] In this embodiment, still refer to Figure 1 As shown, the dual battery circuit also includes a first detection unit 5 and a second detection unit 6, and the control unit 7 is also connected to the first detection unit 5 and the second detection unit 6 respectively. For example, the first detection unit 5 and the second detection unit 6 are electrically connected to the control unit 7 through the Inter-Integrated Circuit bus (i.e., the I2C bus), and the control unit 7 reads the current voltage value of the first battery 1 obtained by the first detection unit 5 and the current voltage value of the second battery 2 obtained by the second detection unit 6 through the Inter-Integrated Circuit bus. Among them, the first detection unit 5 is connected to the first battery 1 and is used to detect the voltage of the first battery 1. The control unit 7 controls the on-off of the current path of the first battery 1 according to the detection result of the first detection unit 5. The second detection unit 6 is connected to the second battery 2 and is used to detect the voltage of the second battery 2. The control unit 7 controls the on-off of the current path of the second battery 2 according to the detection result of the second detection unit 6. The first detection unit 5 and the second detection unit 6 can be, for example, voltage sensors, and the control unit 7 obtains the current voltage value of the first battery 1 or the second battery 2 through the voltage sensor.

[0058] In another exemplary embodiment, Figure 2 As shown, on the basis of the above embodiment, the first switch unit 3 in this embodiment includes a first low-voltage switch unit 31 and a first high-voltage switch unit 32, the control unit 7 is connected to the first low-voltage switch unit 31, the first low-voltage switch unit 31 is connected to the first battery 1 through the first high-voltage switch unit 32, and the first low-voltage switch unit 31 and the first high-voltage switch unit 32 jointly control the on-off of the current path of the first battery 1.

[0059] The control unit 7 includes a GPIO1 (General-purpose input / output), and the first low-voltage switch unit 31 is connected to the control unit 7 through the GPIO1 (General-purpose input / output). The first low-voltage switch unit 31 includes a resistor R1 and a MOS tube 1 (Mosfet, insulated gate field effect transistor) to protect the first low-voltage switch unit 31 and prevent the MOS tube 1 from being damaged due to excessive voltage. The first low-voltage switch unit 31 is connected to the first high-voltage switch unit 32, and the first high-voltage switch unit 32 includes R2 and a MOS tube 2 to protect the first high-voltage switch unit 32 and prevent the MOS tube 2 from being damaged due to excessive voltage. The first low-voltage switch unit 31 is connected to the first battery 1 through the first high-voltage switch unit 32, and the first low-voltage switch unit 31 and the first high-voltage switch unit 32 jointly control the on-off of the current path of the first battery 1, and at the same time play a role in protecting and regulating the current path.

[0060] Still refer to Figure 2 In this embodiment, the second switch unit 4 includes a second low-voltage switch unit 41 and a second high-voltage switch unit 42. The control unit 7 is connected to the second low-voltage switch unit 41. The second low-voltage switch unit 41 is connected to the second battery 2 through the second high-voltage switch unit 42. The second low-voltage switch unit 41 and the second high-voltage switch unit 42 jointly control the on-off of the current path of the second battery 2.

[0061] The control unit 2 includes a GPIO2 (General-purpose input / output), and the second low-voltage switch unit 41 is connected to the control unit 7 via the GPIO2 (General-purpose input / output). The second low-voltage switch unit 41 includes a resistor R3 and a MOS tube 3 (Mosfet, insulated gate field effect transistor), and the second high-voltage switch unit 42 includes a resistor R4 and a MOS tube 4. The second low-voltage switch unit 41 has the same function as the first low-voltage switch unit 31, and the second high-voltage switch unit 42 has the same function as the second low-voltage switch unit 32, which will not be repeated here.

[0062] Here, it should be noted that, since the voltage value of the voltage environment in which the first battery 1 and the second battery 2 are located is greater than the voltage value of the voltage environment in which the control unit 7 is located, if the control unit 7 is directly connected to the first battery 1 or the second battery 2, the voltage between the two is relatively high, such as the first battery 1 or the second battery 2; and the voltage between the two is relatively low, such as the control unit 7. The different voltage environments can easily cause damage to the control unit 7 or the first battery 1 and the second battery 2. In this embodiment, the first switch unit 3 and the second switch unit 4 each include a low-voltage switch unit and a high-voltage switch unit, respectively. The low-voltage switch unit is directly connected to the control unit 7, and the high-voltage switch unit is directly connected to the battery. The control signal output by the control switch can be transmitted between the low-voltage switch unit and the high-voltage switch unit, thereby improving the reliability and safety of the control process.

[0063] In another exemplary embodiment, Figure 2 As shown, based on the above embodiments, the first battery 1 in this embodiment includes a first chip 11 (Integrated Circuit ConTroL, IC CTL for short), a first battery body 12 and a first battery switch 13. The first chip 11 is connected to the first battery body 12 through the first battery switch 13, and the first high-voltage switch unit 32 is connected to the first chip 11.

[0064] Still refer to Figure 2 In this embodiment, the second battery 2 includes a second chip (IC CTL) 21, a second battery body 22 and a second battery switch 23. The second chip 21 is connected to the second battery body 22 through the second battery switch 23, and the second high-voltage switch unit 42 is connected to the second chip 21.

[0065] In this embodiment, the first battery switch 13 and the second battery switch 23 can be MOS tubes. Taking the first battery switch 13 as an example, the first battery switch 13 can include two MOS tubes, and the first chip 11 controls the on and off of the two MOS tubes to control the first battery body 12 to charge or discharge.

[0066] The present disclosure also proposes a control method for a dual battery circuit, which is used to control the dual battery circuit as described above. The control method can be applied to the control unit described above. The dual battery circuit includes a first battery 1 and a second battery 2, and the first battery 1 and the second battery 2 are connected in parallel to power the electronic device. Figure 3 As shown, the control method includes:

[0067] S110, respectively obtain current voltage values ​​of the first battery and the second battery.

[0068] In this step, refer to Figure 1, the current voltage value of the first battery 1 is detected by the first detection unit 5, and the current voltage value of the second battery 2 is detected by the second detection unit 6, and then the current voltage value of the first battery 1 and the current voltage value of the second battery 2 are obtained from the first detection unit 5 and the second detection unit 6 respectively.

[0069] S120: When the current voltage value of the first battery is equal to the current voltage value of the second battery, control the first battery and the second battery to supply power to the outside in parallel.

[0070] In this step, the current voltage value of the first battery 1 is equal to the current voltage value of the second battery 2, which may be that the first battery 1 and the second battery 2 are both in a fully charged state, that is, the total power of the first battery 1 and the second battery 2 is equal, and the first battery 1 and the second battery 2 can be connected in parallel to supply power to the outside. It can also be that the total power of the first battery 1 and the second battery 2 is different, but during the charging or discharging process of the dual battery circuit, at a certain moment, the current voltage values ​​of the first battery 1 and the second battery 2 are equal, and the first battery 1 and the second battery 2 can be connected in parallel to supply power to the outside. For example, the total power of the first battery 1 is 10V, and the total power of the second battery 2 is 8V. At a certain moment, the two batteries reach 4V respectively. At this time, the two batteries can be controlled to supply power to the outside in parallel.

[0071] like Figure 4 As shown, in another exemplary embodiment, the control method in this embodiment includes:

[0072] S210, respectively obtain current voltage values ​​of the first battery and the second battery.

[0073] The premise of this step is that the dual battery circuit is in a charging state. When the dual battery circuit enters the charging state, it is first necessary to control the first switch unit 3 and the second switch unit 4 to be closed simultaneously to charge the first battery 1 and the second battery 2.

[0074] The method for obtaining the current voltage values ​​of the first battery 1 and the second battery 2 in this step is completely the same as the method involved in step S110 in the above embodiment, and will not be described again here.

[0075] S220. When the current voltage value of the first battery reaches a preset value and the current voltage value of the second battery does not reach the preset value, the first switch unit is controlled to be disconnected to disconnect the current path of the first battery, and the second switch unit is controlled to remain closed to conduct the current path of the second battery.

[0076] In this embodiment, the total power of the first battery 1 and the second battery 2 in the fully charged state is the same, that is, in the fully charged state, the current voltage value of the first battery 1 is equal to the current voltage value of the second battery 2. In this step, the preset value is the voltage value of any one of the first battery 1 and the second battery 2. For example, the total power of the first battery 1 and the second battery 2 are both 10V, and the preset value can be set to 10V. When the first battery 1 and the second battery 2 are fully charged, the current voltage value of the first battery 1 and the current voltage value of the second battery 2 are both 10V.

[0077] Reference Figure 2 As shown, when it is detected that the current voltage value of the first battery 1 reaches the preset value, the second preset level information is output to the first switch unit 3, and the first switch unit 3 is controlled to be disconnected to disconnect the current path of the first battery 1 and stop charging the first battery 1. When the current voltage value of the second battery 2 does not reach the preset value, the first preset level information is output to the second switch unit 4, and the second switch unit 4 is controlled to remain closed to conduct the current path of the second battery 2, so that the second battery 2 remains in a charging state. Among them, the first preset level information is a low level, and the second preset level information is a high level.

[0078] like Figure 5 As shown, in another exemplary embodiment, the control method in this embodiment includes:

[0079] S310, respectively obtain current voltage values ​​of the first battery and the second battery.

[0080] The premise of this step is that the dual battery circuit is in a charging state. When the dual battery circuit enters the charging state, it is first necessary to control the first switch unit 3 and the second switch unit 4 to be closed simultaneously to charge the first battery 1 and the second battery 2.

[0081] The method for obtaining the current voltage values ​​of the first battery 1 and the second battery 2 in this step is exactly the same as the method involved in step S210 in the above embodiment, and will not be repeated here.

[0082] S320, when the current voltage value of the first battery does not reach the preset value and the current voltage value of the second battery reaches the preset value, the first switch unit is controlled to remain closed to conduct the current path of the first battery, and the second switch unit is controlled to be opened to disconnect the current path of the second battery.

[0083] In this step, refer to Figure 2As shown, when it is detected that the current voltage value of the first battery 1 does not reach the preset value, the first preset level information is output to the first switch unit 3, and the first switch unit 3 is controlled to remain closed to conduct the current path of the first battery 1, so that the first battery 1 remains in a charging state. When the current voltage value of the second battery 2 reaches the preset value, the second preset level information is output to the second switch unit 4, and the second switch unit 4 is controlled to be opened to disconnect the current path of the second battery 2 and stop charging the second battery 2.

[0084] like Figure 6 As shown, in another exemplary embodiment, the control method in this embodiment includes:

[0085] S410, respectively obtain current voltage values ​​of the first battery and the second battery.

[0086] The premise of this step is that the dual battery circuit is in a charging state. When the dual battery circuit enters the charging state, it is first necessary to control the first switch unit 3 and the second switch unit 4 to be closed simultaneously to charge the first battery 1 and the second battery 2.

[0087] The method for obtaining the current voltage values ​​of the first battery 1 and the second battery 2 in this step is exactly the same as the method involved in step S210 in the above embodiment, and will not be repeated here.

[0088] S420. When the current voltage value of the first battery reaches a preset value and the current voltage value of the second battery does not reach the preset value, the first switch unit is controlled to be disconnected to disconnect the current path of the first battery, and the second switch unit is controlled to remain closed to conduct the current path of the second battery.

[0089] The method involved in this step is exactly the same as the method involved in step S220 in the above embodiment, and will not be repeated here.

[0090] S430: If the current voltage value of the second battery reaches a preset value, the first switch unit is controlled to be closed, and the first battery and the second battery are connected in parallel to supply power to the outside.

[0091] In this step, refer to Figure 2As shown, in the dual battery circuit, when the first battery 1 is fully charged, the first switch unit 3 is disconnected; when the second switch unit 4 remains closed, the second battery 2 continues to charge. When it is detected that the current voltage value of the second battery 2 reaches the preset value, it means that at this time, the second battery 2 has also fully charged the circuit. At this time, the control unit 7 outputs the first preset level information to the first low-voltage switch unit 31, and the first low-voltage switch unit 31 transmits the first preset level information to the first high-voltage switch unit 32. The first high-voltage switch unit 32 outputs the first preset level information to the first chip 11, controls the first battery switch 13 to close, and conducts the current path of the first battery 1. At this time, the current voltage value of the first battery 1 and the current voltage value of the second battery 2 are connected in parallel to supply power to the outside.

[0092] like Figure 7 As shown, in another exemplary embodiment, the control method in this embodiment includes:

[0093] S510, respectively obtain current voltage values ​​of the first battery and the second battery.

[0094] The premise of this step is that the dual battery circuit is in a charging state. When the dual battery circuit enters the charging state, it is first necessary to control the first switch unit 3 and the second switch unit 4 to be closed simultaneously to charge the first battery 1 and the second battery 2.

[0095] The method for obtaining the current voltage values ​​of the first battery 1 and the second battery 2 in this step is completely the same as the method involved in step S310 in the above embodiment, and will not be repeated here.

[0096] S520. When the current voltage value of the first battery does not reach the preset value and the current voltage value of the second battery reaches the preset value, the first switch unit is controlled to remain closed to conduct the current path of the first battery, and the second switch unit is controlled to be opened to disconnect the current path of the second battery.

[0097] The method involved in this step is exactly the same as the method involved in step S320 in the above embodiment, and will not be repeated here.

[0098] S530: If the current voltage value of the first battery reaches a preset value, the second switch unit is controlled to be closed, and the first battery and the second battery are connected in parallel to supply power to the outside.

[0099] In this step, refer to Figure 2As shown, in the dual battery circuit, when the first switch unit 3 remains closed, the first battery 1 continues to charge; when the second battery 2 is fully charged, the second switch unit 4 is disconnected. When it is detected that the current voltage value of the first battery 1 reaches the preset value, it means that at this time, the first battery 1 has also fully charged the circuit. At this time, the control unit 7 outputs the first preset level information to the second low-voltage switch unit 41, and the second low-voltage switch unit 41 transmits the first preset level information to the second high-voltage switch unit 42. The second high-voltage switch unit 42 outputs the first preset level information to the second chip 22, controls the second battery switch 23 to close, and conducts the current path of the second battery 2. At this time, the current voltage value of the first battery 1 is the same as the current voltage value of the second battery 2, and the first battery 1 and the second battery 2 are connected in parallel to supply power to the outside.

[0100] In this embodiment, in order to ensure that the dual battery circuit can still supply power to the electronic device during the charging process, after the current path of the fully charged battery is disconnected, the battery still being charged charges while supplying power to the electronic device. For example, if the second battery 2 is fully charged and the first battery 1 is still being charged, then during the charging process of the first battery 1, the first battery 1 still supplies power to the electronic device.

[0101] The present disclosure also proposes an electronic device, including the dual battery circuit as described above, wherein the electronic device may be an electronic device with a built-in battery, such as a mobile phone with a foldable screen, a tablet computer, a laptop computer, etc.

[0102] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0103] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A dual battery circuit, applied to electronic equipment, characterized in that: The dual battery circuit comprises: First battery; a second battery, connected in parallel with the first battery; a first switch unit, comprising a first low-voltage switch unit and a first high-voltage switch unit, wherein the first low-voltage switch unit is connected to the first battery through the first high-voltage switch unit, and the first low-voltage switch unit and the first high-voltage switch unit jointly control the on-off of a current path of the first battery; A second switch unit, comprising a second low-voltage switch unit and a second high-voltage switch unit, wherein the second low-voltage switch unit is connected to the second battery through the second high-voltage switch unit, and the second low-voltage switch unit and the second high-voltage switch unit jointly control the on-off of the current path of the second battery; a first detection unit, connected to the first battery, and configured to detect a voltage of the first battery; a second detection unit, connected to the second battery, and configured to detect a voltage of the second battery; a control unit, connected to the first low-voltage switch unit and the second low-voltage switch unit respectively, and further connected to the first detection unit and the second detection unit respectively; The control unit is used to control the first battery and the second battery to supply power to the outside in parallel when the voltage of the first battery is equal to the voltage of the second battery; The electronic devices include mobile phones, tablet computers and laptops.

2. The dual battery circuit according to claim 1, characterized in that: The first battery includes a first chip, a first battery body and a first battery switch, the first chip is connected to the first battery body through the first battery switch, and the first high-voltage switch unit is connected to the first chip; The second battery includes a second chip, a second battery body and a second battery switch. The second chip is connected to the second battery body through the second battery switch, and the second high-voltage switch unit is connected to the second chip.

3. The dual battery circuit according to claim 1, characterized in that: The first detection unit and the second detection unit are electrically connected to the control unit via an Inter-Integrated Circuit bus respectively.

4. A control method for a dual battery circuit, characterized in that: Used to control the dual battery circuit according to any one of claims 1 to 3, the control method comprising: respectively obtaining current voltage values ​​of the first battery and the second battery; When the current voltage value of the first battery is equal to the current voltage value of the second battery, the first battery and the second battery are controlled to supply power to the outside in parallel.

5. The control method of the dual battery circuit according to claim 4, characterized in that: The control method further comprises: The dual battery circuit obtains the current voltage values ​​of the first battery and the second battery respectively when the dual battery circuit is in a charging state; When the current voltage value of the first battery reaches a preset value and the current voltage value of the second battery does not reach the preset value, the first switch unit is controlled to be opened to disconnect the current path of the first battery, and the second switch unit is controlled to remain closed to conduct the current path of the second battery; or, When the current voltage value of the first battery does not reach the preset value and the current voltage value of the second battery reaches the preset value, the first switch unit is controlled to remain closed to conduct the current path of the first battery, and the second switch unit is controlled to be opened to disconnect the current path of the second battery.

6. The control method according to claim 5, characterized in that: The control method further comprises: In the dual battery circuit, when the first switch unit is disconnected and the second switch unit is closed, if the current voltage value of the second battery reaches the preset value, the first switch unit is controlled to be closed, and the first battery and the second battery are connected in parallel to supply power to the outside; or, When the dual battery circuit is in a charging state, when the first switch unit is closed and the second switch unit is opened, if the current voltage value of the first battery reaches the preset value, the second switch unit is controlled to be closed, and the first battery and the second battery are connected in parallel to supply power to the outside.

7. The control method according to claim 5, characterized in that: The control method further comprises: When the dual battery circuit switches from the external power supply state to the charging state, the first switch unit and the second switch unit are controlled to be closed simultaneously to charge the first battery and the second battery.

8. The control method according to claim 5, characterized in that: The control method further comprises: When the dual battery circuit switches from the charging state to the external power supply state, the first switch unit and the second switch unit are controlled to be closed at the same time, and the first battery and the second battery supply power to the outside in parallel.

9. The control method according to any one of claims 5 to 8, characterized in that: The control method further comprises: Controlling the first switch unit to close includes: Outputting first preset level information to the first low voltage switch unit; Controlling the second switch unit to close includes: The first preset level information is output to the second low voltage switch unit.

10. The control method according to any one of claims 5 to 8, characterized in that: The dual battery circuit is in charging state. Controlling the first switch unit to disconnect includes: Outputting second preset level information to the first low voltage switch unit; Controlling the second switch unit to disconnect, comprising: The second preset level information is output to the second low voltage switch unit.

11. An electronic device, characterized in that: Comprising a dual battery circuit as claimed in any one of claims 1 to 3.

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