Charging module and electronic device

Abstract

The application discloses a charging module and an electronic device. The charging module comprises a charging chip, a first charging unit and a second charging unit. The charging chip is connected with a power storage unit. The first charging unit is connected with the charging chip. The first end of the second charging unit is connected with a first voltage end. The second end of the second charging unit is connected with one connection end between the first charging unit and the charging chip. In the first working mode, alternating current input from the first charging unit is transmitted to the second charging unit and / or the power storage unit, and the charging chip works in a full-bridge rectification mode. In the second working mode, direct current output from the power storage unit is transmitted to the second charging unit through the charging chip, and the charging chip works in a half-bridge inversion mode. Direct current is transmitted to the first charging unit through the charging chip, and the charging chip works in a full-bridge inversion mode.

Description

Technical Field

[0001] This application relates to the field of electrical technology, and in particular to a charging module and electronic device. Background Technology

[0002] With the development of wireless charging technology, electronic devices not only need to be wirelessly charged in the forward direction to charge themselves, but can also wirelessly charge various external devices in the reverse direction. Bidirectional wireless charging technology can bring users a better charging experience.

[0003] Currently, implementing bidirectional wireless charging technology in the same electronic device generally requires the device to have two wireless charging modules: one for wirelessly charging the device itself, and the other for wirelessly charging external devices. Since the wireless charging module for charging the device itself and the module for charging external devices are independent, two separate wireless charging chips are needed to achieve bidirectional wireless charging for the same device. This results in a large footprint, poor circuit board layout, and high cost. Summary of the Invention

[0004] This application provides a charging module and an electronic device to solve the problems of large space occupation and high cost of current charging modules that realize bidirectional wireless charging in the same electronic device.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a charging module, including:

[0007] A charging chip, which is connected to the energy storage unit;

[0008] A first charging unit is connected to the charging chip.

[0009] The second charging unit has a first end connected to a first voltage terminal and a second end connected to a first connection terminal, which is a connection terminal connecting the first charging unit to the charging chip.

[0010] The charging module has a first operating mode and a second operating mode. In the first operating mode, AC power input from the first charging unit is transmitted to the second charging unit, and / or, the AC power is transmitted to the energy storage unit through the charging chip, and the charging chip operates in full-bridge rectification mode. In the second operating mode, DC power output from the energy storage unit is transmitted to the second charging unit through the charging chip, and the charging chip operates in half-bridge inverter mode, and / or, the DC power is transmitted to the first charging unit through the charging chip, and the charging chip operates in full-bridge inverter mode.

[0011] Secondly, embodiments of this application also provide an electronic device, including the charging module described in the first aspect above.

[0012] Thus, in the above-mentioned solution of this application, when wireless charging is performed based on the first charging unit, a single charging chip can simultaneously enable one path to charge the energy storage unit by rectifying the AC power obtained from the first charging unit through a full-bridge rectifier, and another path to supply power to the outside by rectifying the AC power obtained from the first charging unit through the second charging unit. Furthermore, when supplying power to the outside through the energy storage unit, the charging chip can also enable one path to supply power to the first charging unit by inverting the DC power output from the energy storage unit through a full-bridge rectifier, and another path to supply power to the second charging unit by inverting the DC power output from the energy storage unit through a half-bridge rectifier. That is, a single charging chip can realize bidirectional, multi-path wireless charging functions, thereby reducing space occupation, facilitating the spatial layout of the circuit board, and helping to reduce costs. Attached Figure Description

[0013] Figure 1 One of the block diagrams illustrating a charging module according to an embodiment of this application;

[0014] Figure 2 A second block diagram illustrating the charging module according to an embodiment of this application;

[0015] Figure 3 One of the circuit diagrams illustrating the charging module according to an embodiment of this application;

[0016] Figure 4 The third block diagram illustrating the charging module according to an embodiment of this application;

[0017] Figure 5 This is a second circuit diagram illustrating the charging module according to an embodiment of this application. Detailed Implementation

[0018] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0019] like Figure 1 As shown in the figure, this application provides a charging module, including: a charging chip 11, a first charging unit 12, and a second charging unit 13.

[0020] The charging chip 11 is connected to the energy storage unit 14; the first charging unit 12 is connected to the charging chip 11; the first end of the second charging unit 13 is connected to the first voltage terminal 15; the second end of the second charging unit 13 is connected to the first connection terminal, which is a connection terminal connecting the first charging unit 12 and the charging chip 11.

[0021] The charging module has a first operating mode and a second operating mode. In the first operating mode, the AC power input from the first charging unit 12 is transmitted to the second charging unit 13, and / or, the AC power is transmitted to the energy storage unit 14 through the charging chip 11, and the charging chip 11 operates in full-bridge rectification mode. In the second operating mode, the DC power output from the energy storage unit 14 is transmitted to the second charging unit 13 through the charging chip 11, and the charging chip 11 operates in half-bridge inverter mode, and / or, the DC power is transmitted to the first charging unit 12 through the charging chip 11, and the charging chip 11 operates in full-bridge inverter mode.

[0022] Optionally, the energy storage unit 14 can be a battery or other energy storage device. For example, if the charging module is installed in an electronic device such as a mobile phone or tablet computer, the charging module can be connected to the battery in the electronic device.

[0023] Optionally, the charging chip 11 may include: a bridge converter circuit, a low dropout regulator (LDO), a processor, and other circuit modules. The bridge converter circuit can be used to convert AC to DC and / or convert DC to AC; other circuit modules may include: an M0 processor, a power drive, and a bias circuit, etc., but this embodiment is not limited thereto.

[0024] Optionally, the first voltage terminal 15 can be a ground terminal or other stable voltage terminal with a non-zero voltage value, so that the second charging unit 13 can form a circuit when it is working. This application embodiment is not limited to this.

[0025] Optionally, the first charging unit 12 can be used as a charging unit for the energy storage unit 14. When the first charging unit 12 is coupled to the wireless charging base, it can obtain AC power from the wireless charging base and convert it into DC power that meets the voltage requirements of the energy storage unit 14 through the charging chip 11, thereby charging the energy storage unit 14.

[0026] Of course, when the first charging unit 12 is coupled to the wireless charging base, the first charging unit 12 can also supply power to the second charging unit 13, and the second charging unit 13 can be used as a charging unit for external charging (for example, for electronic devices equipped with a stylus, the external charging unit can be used to charge the stylus).

[0027] Optionally, the first charging unit 12 can also be used as a charging unit for external charging. For example, the DC power output by the energy storage unit 14 is converted into AC power by the charging chip 11, and then AC power that meets the external power supply requirements is obtained and transmitted to the first charging unit 12, so that the first charging unit 12 can supply power to the outside.

[0028] Of course, the DC power output by the energy storage unit 14 can also be transmitted to the second charging unit 13 through the charging chip 11, that is, the energy storage unit 14 can also supply power to the outside through the second charging unit 13.

[0029] In the above scheme, when wireless charging is performed based on the first charging unit 12, a single charging chip 11 can simultaneously enable one path to charge the energy storage unit 14 with AC power obtained from the first charging unit 12 through a full-bridge rectifier, and another path to supply power to the outside via the second charging unit 13 with AC power obtained from the first charging unit 12. Furthermore, when supplying power to the outside via the energy storage unit 14, the charging chip 11 can also enable one path to supply power to the first charging unit 12 with DC power output from the energy storage unit 14 through a full-bridge inverter, and another path to supply power to the second charging unit 13 with DC power output from the energy storage unit 14 through a half-bridge inverter. That is, a single charging chip 11 can realize bidirectional, multi-path wireless charging functions, thereby reducing space occupation, facilitating circuit board layout, and helping to reduce costs.

[0030] Furthermore, in this scheme, when power is supplied to the outside through the energy storage unit 14, the charging chip 11 has a full-bridge inverter mode that supplies power to the outside through the first charging unit 12, and a half-bridge inverter mode that supplies power to the outside through the second charging unit 13. In this way, when bidirectional and multi-channel wireless charging functions are realized through one charging chip 11, it can be compatible with various charging demand scenarios. For example, supplying power to the outside through the full-bridge inverter mode can ensure high power demand, while supplying power to the outside through the half-bridge inverter mode can ensure a wider charging range.

[0031] Optionally, the second charging unit 13 includes: a second energy storage element 132 and a second charging coil 131.

[0032] Wherein, the first end of the second charging coil 131 is connected to the first voltage terminal 15, and the second end of the second charging coil 131 is connected to the first connection terminal through the second energy storage element 132; or, the first end of the second charging coil 131 is connected to the first voltage terminal 15 through the second energy storage element 132, and the second end of the second charging coil 131 is connected to the first connection terminal.

[0033] Specifically, the process of supplying power from the first charging unit 12 to the second charging coil 131 involves the direct transmission of AC power obtained from the first charging unit 12 to the second charging coil 131 and the second energy storage element 132. The current conversion process of supplying power from the energy storage unit 14 to the second charging coil 131 can be as follows: In the first half-cycle of the bridge converter circuit of the charging chip 11, the DC power output by the energy storage unit 14 is transmitted through the charging chip 11 to the second charging coil 131 and the second energy storage element 132. At this time, the second energy storage element 132 is charged, and the current direction of the second charging coil 131 is the first direction. In the second half-cycle of the bridge converter circuit, the second energy storage element 132 discharges, and the current direction of the second charging coil 131 is the second direction, and the first direction is opposite to the second direction, thereby forming AC magnetic energy on the second charging coil 131.

[0034] Optionally, the second charging unit 13 can also serve as a charging unit for the energy storage unit 14, and its principle is similar to that of the first charging unit 12 described above, so it will not be described again here.

[0035] Optionally, such as Figure 3 As shown, the second energy storage element 132 may include: a second capacitor C2; the second capacitor C2 is connected in series between the first end of the second charging coil 131 and the first voltage terminal 15, or the second capacitor C2 is connected in series between the second end of the second charging coil 131 and the first connection terminal.

[0036] In this embodiment, the second capacitor C2 can serve as an energy storage element, providing AC magnetic energy generated in the second charging coil 131 when the energy storage unit 14 supplies power to the outside through the second charging coil 131, and under the action of the second capacitor C2, the second charging coil 131 can transmit greater power.

[0037] Optionally, such as Figure 2 and Figure 3As shown, the charging module further includes: a first switching unit 16; the first switching unit 16 is connected in series between the first end of the second charging unit 13 and the first voltage terminal 15, or the first switching unit 16 is connected in series between the second end of the second charging unit 13 and the first connection terminal.

[0038] The first switching unit 16 may include a controllable switch S1 (such as a single-pole single-throw switch, a controllable transistor, etc.), and the controllable switch S1 has an on state and an off state, that is, the first switching unit 16 has an on state and an off state.

[0039] When the first switching unit 16 is in the conducting state, the second charging unit 13 can obtain power from the wireless charging base through the first charging unit 12, or obtain power from the energy storage unit 14 through the charging chip 11 to supply power to the outside; or, the second charging unit 13 can obtain power from an external device (such as a wireless charging base or other wireless power supply device) and transmit it to the first charging unit 12 or transmit it to the energy storage unit 14 through the charging chip 11.

[0040] When the first switching unit 16 is in the off state, the second charging unit 13 does not work. In this way, when the second charging unit 13 does not need to work, the power loss on the second charging unit 13 when the first charging unit 12 is working can be reduced by controlling the first switching unit 16 to turn off.

[0041] Optionally, the first charging unit 12 includes a first energy storage element 122 and a first charging coil 121.

[0042] The first end of the first charging coil 121 is connected to the first input terminal of the charging chip 11 through the first energy storage element 122, and the second end of the first charging coil 121 is connected to the second input terminal of the charging chip 11.

[0043] Optionally, the first input terminal of the charging chip 11 may be one of the bridge arm input terminals of the bridge converter circuit, and the second input terminal of the charging chip 11 may be the other bridge arm input terminal of the bridge converter circuit.

[0044] For example, the first end of the first charging coil 121 can be connected to the first bridge arm input of the bridge converter circuit of the charging chip 11, and the second end of the first charging coil 121 can be connected to the second bridge arm input of the bridge converter circuit of the charging chip 11; the first energy storage element 122 can be connected in series between the first end of the first charging coil 121 and the first bridge arm input, or the first energy storage element 122 can be connected in series between the second end of the first charging coil 121 and the second bridge arm input.

[0045] Optionally, the first energy storage element 122 includes: a first capacitor C1; the first end of the first charging coil 121 is connected to the first input end of the charging chip 11 through the first capacitor C1, that is, the first capacitor C1 is connected in series between the first charging coil 121 and the charging chip 11.

[0046] For example, the first capacitor C1 can be connected in series between the first end of the first charging coil 121 and the first bridge arm input terminal of the bridge converter circuit of the charging chip 11, or the first capacitor C1 can be connected in series between the second end of the first charging coil 121 and the second bridge arm input terminal of the bridge converter circuit of the charging chip 11.

[0047] In this embodiment, when the first charging coil 121 supplies power to the second charging coil 131 and / or the energy storage unit 14, the first charging coil 121 senses the AC energy emitted by the wireless charging base and can obtain greater power under the action of the first capacitor C1; if the energy storage unit 14 charges other devices in reverse, the first charging coil 121 emits AC energy outward and can transmit greater power under the action of the first capacitor C1.

[0048] like Figure 3 As shown, the charging chip 11 includes: a bridge converter circuit 111; the first charging coil 121 is connected to the energy storage unit 14 through the bridge converter circuit 111; the first connection terminal is the connection terminal between the first charging coil 121 and the bridge converter circuit 111.

[0049] For example, the first end of the first charging coil 121 can be connected to the first bridge arm input terminal of the bridge converter circuit 111, and the second end of the first charging coil 121 can be connected to the second bridge arm input terminal of the bridge converter circuit 111; the first connection terminal can be the connection terminal between the first end of the first charging coil 121 and the first bridge arm input terminal, or the connection terminal between the second end of the first charging coil 121 and the second bridge arm input terminal.

[0050] In the first operating mode, the bridge converter circuit 111 is in full-bridge rectification mode; in the second operating mode, when the second electrical energy output by the energy storage unit 14 is transmitted to the second charging coil 131 and the second energy storage element 132 through the charging chip 11, the bridge converter circuit 111 is in half-bridge inverter mode; when the second electrical energy is transmitted to the first charging coil 121 through the charging chip 11, the bridge converter circuit 111 is in full-bridge inverter mode.

[0051] Specifically, in the full-bridge rectification mode, the bridge converter circuit 111 can convert the AC power obtained from the first charging coil 121 into DC power and transmit it to the energy storage unit 14 through the output terminal Vout; in the half-bridge inverter mode, the bridge converter circuit 111 can convert the DC power output from the energy storage unit 14 into AC power and output it to the second charging coil 131; in the full-bridge inverter mode, the bridge converter circuit 111 can convert the DC power output from the energy storage unit 14 into AC power and output it to the first charging coil 121.

[0052] Optionally, the charging chip 11 includes: a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4; that is, the bridge converter circuit 111 includes: a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4.

[0053] The first end of the first switch Q1 is connected to the energy storage unit 14, the second end of the first switch Q1 is connected to the first end of the first charging unit 12, the first end of the second charging unit 13 and the first end of the third switch Q3 respectively, and the second end of the third switch Q3 is connected to the second voltage terminal 18.

[0054] The first end of the second switch Q2 is connected to the energy storage unit 14, the second end of the second switch Q2 is connected to the second end of the first charging unit 12 and the first end of the fourth switch Q4, and the second end of the fourth switch Q4 is connected to the second voltage terminal 18.

[0055] Optionally, the second voltage terminal 18 can be a ground terminal or other stable voltage terminal with a non-zero voltage value, so that the first charging unit 12 can form a circuit when it is working. This application embodiment is not limited to this.

[0056] For example, in full-bridge rectification mode, during the first half-cycle of the bridge converter circuit 111 (i.e., the current in the first charging coil 121 is in the first direction), the first switch Q1 and the fourth switch Q4 are in the on state, while the second switch Q2 and the third switch Q3 are in the off state. During the second half-cycle of the bridge converter circuit 111 (i.e., the current in the first charging coil 121 is in the second direction), the second switch Q2 and the third switch Q3 are in the on state, while the first switch Q1 and the fourth switch Q4 are in the off state, thus causing the output terminal Vout to output DC power to the energy storage unit 14, i.e., the rectification process. The first direction is opposite to the second direction.

[0057] Correspondingly, the full-bridge inverter mode can be understood as the reverse process of the full-bridge rectification mode, which is similar to the principle mentioned above and will not be elaborated here.

[0058] For example, in half-bridge inverter mode, the second switch Q2 and the fourth switch Q4 are in the off state. In the first half cycle of the bridge converter circuit 111, the first switch Q1 is in the on state and the third switch Q3 is in the off state. The DC power output from the output terminal Vout of the energy storage unit 14 passes through the first switch Q1, the second capacitor C2, the second charging coil 131, and the controllable switch S1 to ground. At this time, the second capacitor C2 can store energy, and the current in the second charging coil 131 is in the first direction. In the second half cycle of the bridge converter circuit 111, the first switch Q1 is in the off state and the third switch Q3 is in the on state. The second capacitor C2 discharges, and the current passes through the third switch Q3, the controllable switch S1, and the second charging coil 131. At this time, the current in the second charging coil 131 is in the second direction, thereby forming AC magnetic energy in the second charging coil 131.

[0059] In this embodiment, one end of the second charging coil 131 is connected to half of the bridge arm of the bridge converter circuit 111, and the other end is grounded through a controllable switch S1. This allows the second charging coil 131 to obtain AC power from the energy storage unit 14 through the charging chip 11, using any half of the bridge converter circuit 111 within the charging chip 11 as the inverter bridge.

[0060] Optionally, the voltage conversion control transistor Q5 connected to the bridge converter circuit 111 is used to convert the voltage output by the bridge converter circuit 111 into a voltage range Vout acceptable to the subsequent circuit. In addition to the bridge converter circuit 111 and the voltage conversion control transistor Q5, the charging chip 11 may also include other circuit modules, such as the M0 processor, power drive and bias circuit, etc. The embodiments of this application are not limited thereto.

[0061] like Figure 4 and Figure 5 As shown, the charging module further includes a second switching unit 17, which is connected in series between the first charging unit 12 and the charging chip 11.

[0062] The second switching unit 17 may include a controllable switch S2 (such as a single-pole single-throw switch, a controllable transistor, etc.), and the controllable switch S2 has an on state and an off state, that is, the second switching unit 17 has an on state and an off state.

[0063] In this embodiment, by providing a second switching unit 17 between the first charging unit 12 and the charging chip 11, the paths of the first charging unit 12 and the second charging unit 13 can be made independent, thereby improving the electrical usability of the circuit. For example, when the energy storage unit 14 supplies power to the second charging unit 13, the second switching unit 17 can be controlled to be in the off state to reduce the energy loss on the first charging unit 12, thereby reducing the energy consumption when the energy storage unit 14 supplies power to the second charging unit 13 in reverse.

[0064] This application also provides an electronic device, including the charging module described above, which achieves the technical effects of the charging module described above. To avoid repetition, it will not be described again here.

[0065] See Figure 4 and Figure 5 The working principle of the charging module in this embodiment will be explained below, taking the first charging unit 12 as a wireless charging coil for charging the energy storage unit 14 in the electronic device and the second charging unit 13 as a stylus charging coil for charging the stylus equipped in the electronic device as examples:

[0066] The wireless charging coil (i.e., the first charging coil 121), the charging chip 11, and the energy storage unit 14 can constitute a path for the electronic device to wirelessly charge itself and for the electronic device to wirelessly charge an external device. For example, when the electronic device is coupled to the wireless charging base, the wireless charging coil can obtain AC power from the wireless charging base and convert it into DC power through the charging chip 11, which is then transmitted to the energy storage unit 14 to charge the energy storage unit 14. When the electronic device wirelessly charges an external device, the energy storage unit 14 outputs DC power, which is converted into AC power through the charging chip and transmitted to the wireless charging coil, which then transmits AC power to charge the external device coupled to the wireless charging coil.

[0067] In addition, the energy of the stylus charging coil (i.e., the second charging coil 131) can be obtained from two paths: one is from the energy storage unit 14 in the electronic device, and the other is from the wireless charging coil.

[0068] The stylus charging coil obtains energy from the wireless charging coil as follows: when the electronic device is coupled to the wireless charging base through the wireless charging coil, that is, when the electronic device is charging through the wireless charging coil, S2 is closed, the input terminal of the charging chip 11 is AC power, that is, the node between Q1 and Q3 is AC power, when S1 is closed, a portion of the AC power in the wireless charging coil flows to the stylus charging coil.

[0069] The stylus charging coil obtains energy from the energy storage unit 14 in the electronic device as follows: When S5 is closed, the energy storage unit 14 outputs DC power to the charging chip 11. The charging chip 11 can be set to transmit mode by the application processor (AP) of the electronic device, which can convert DC power to AC power by the half-bridge composed of Q1 and Q3. If Q2 and Q4 are in the off state, when Q1 is on and Q3 is off, a circuit is formed of Q1, C2, stylus charging coil, S1, and GND, and C2 stores energy at this time. When Q3 is on and Q1 is off, C2 discharges, forming a circuit of C2, Q3, S1, and stylus charging coil, that is, AC magnetic energy is generated on the stylus transmitting coil to realize the external transmission of energy.

[0070] Optionally, when the stylus charging coil obtains energy from the energy storage unit 14 in the electronic device, S2 can be controlled to disconnect, thereby reducing the additional power loss caused by the wireless charging coil (first charging coil 121) when the energy storage unit 14 charges the stylus through the stylus charging coil.

[0071] It should be noted that the embodiments of this application use a half-bridge method for the stylus charging coil to obtain power from the energy storage unit as an example. However, the stylus charging coil can also use a full-bridge method to obtain power from the energy storage unit, such as connecting one end of the stylus charging coil to the first bridge arm input terminal of the bridge converter circuit 111 and the other end to the second bridge arm input terminal of the bridge converter circuit 111, to achieve full-bridge conversion. Of course, the stylus charging coil can also be used as a charging coil to charge the energy storage unit, etc., and the embodiments of this application are not limited thereto.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0074] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0075] The above describes the preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles described in this application, and these improvements and modifications are also within the protection scope of this application.

Claims

1. A charging module, characterized in that, include: A charging chip, which is connected to the energy storage unit; A first charging unit is connected to the charging chip. The second charging unit has a first end connected to a first voltage terminal and a second end connected to a first connection terminal, which is a connection terminal connecting the first charging unit to the charging chip. The charging module has a first operating mode and a second operating mode. In the first operating mode, the AC power input from the first charging unit is directly transmitted to the second charging unit, and / or, the AC power input from the first charging unit is transmitted to the energy storage unit through the charging chip, and the charging chip operates in full-bridge rectification mode. In the second operating mode, the DC power output from the energy storage unit is transmitted to the second charging unit through the charging chip, and the charging chip operates in half-bridge inverter mode, and / or, the DC power output from the energy storage unit is transmitted to the first charging unit through the charging chip, and the charging chip operates in full-bridge inverter mode. The first charging unit includes a first energy storage element and a first charging coil; a first end of the first charging coil is connected to a first input terminal of the charging chip through the first energy storage element, and a second end of the first charging coil is connected to a second input terminal of the charging chip. The second charging unit includes: a second energy storage element and a second charging coil; The first end of the second charging coil is connected to the first voltage terminal, and the second end of the second charging coil is connected to the first connection terminal through the second energy storage element; or, The first end of the second charging coil is connected to the first voltage terminal through the second energy storage element, and the second end of the second charging coil is connected to the first connection terminal.

2. The charging module according to claim 1, characterized in that, The first energy storage element includes: a first capacitor; The first end of the first charging coil is connected to the first input terminal of the charging chip through the first capacitor.

3. The charging module according to claim 1, characterized in that, The second energy storage element includes: a second capacitor; The second capacitor is connected in series between the second end of the first charging coil and the first connection end; or, The second capacitor is connected in series between the first end of the first charging coil and the first voltage terminal.

4. The charging module according to claim 1, characterized in that, Also includes: First switching unit; The first switching unit is connected in series between the first terminal of the second charging unit and the first voltage terminal; or, The first switch unit is connected in series between the second end of the second charging unit and the first connection end.

5. The charging module according to claim 1, characterized in that, Also includes: Second switching unit; The second switching unit is connected in series between the first charging unit and the charging chip.

6. The charging module according to claim 1, characterized in that, The charging chip includes: a first switch, a second switch, a third switch, and a fourth switch; The first end of the first switch is connected to the energy storage unit, the second end of the first switch is connected to the first end of the first charging unit, the first end of the second charging unit and the first end of the third switch respectively, and the second end of the third switch is connected to the second voltage terminal; The first end of the second switch is connected to the energy storage unit, the second end of the second switch is connected to the second end of the first charging unit and the first end of the fourth switch, and the second end of the fourth switch is connected to the second voltage terminal.

7. The charging module according to claim 6, characterized in that, Both the first voltage terminal and the second voltage terminal are grounded terminals.

8. An electronic device, characterized in that, Includes the charging module as described in any one of claims 1 to 7.

Images