CN216414180U - Power conversion structure, system, electronic device and chip unit - Google Patents
Power conversion structure, system, electronic device and chip unit Download PDFInfo
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- CN216414180U CN216414180U CN202220721274.XU CN202220721274U CN216414180U CN 216414180 U CN216414180 U CN 216414180U CN 202220721274 U CN202220721274 U CN 202220721274U CN 216414180 U CN216414180 U CN 216414180U
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Abstract
The utility model provides a power conversion structure, a system, electronic equipment and a chip unit, which comprises an A-phase converter and a B-phase converter, wherein the A-phase converter comprises a first switch series branch, a third switch series branch, a first flying capacitor CfA and a first inductor LA, the B-phase converter comprises a second switch series branch, a fourth switch series branch, a second flying capacitor CfB and a second inductor LB, the power conversion structure can be configured into two parallel switch capacitor converters to carry out quick charging on a battery pack, and the power conversion structure can also be configured into two parallel three-level buck converters to carry out quick charging on the battery pack.
Description
Technical Field
The utility model relates to the field of power supplies, in particular to a power conversion structure, a power conversion system, electronic equipment and a chip unit.
Background
As technology has continued to advance, various electronic devices, such as portable devices (including mobile phones, tablets, digital cameras, MP3 players, watches, and/or other similar electronic devices), have become popular. Each electronic device may employ a plurality of rechargeable battery cells connected in series and/or parallel to form a rechargeable battery pack for storing electrical energy. Rechargeable battery packs, which may be various types of battery packs such as lithium-ion (Li-ion) battery packs, may be charged by an adapter connected to the electronic device and a power conversion structure within the electronic device to recover the energy of the battery.
The market now expects the power conversion structure to be able to complete the charging of the battery pack in shorter and shorter time, and at the same time expects the power conversion structure to be small in size, efficient and low in cost, so as to meet the demands of consumers on miniaturization, high efficiency and low cost of electronic devices. And it is also desirable that the power conversion architecture be compatible with various types of adapters to provide convenience to the user.
There are a variety of power conversion architectures suitable for charging rechargeable battery packs. A schematic diagram of a prior art battery charging system is shown in fig. 1. In fig. 1, the adapter 10 provides a bus voltage Vbus to a switched capacitor converter 21 and a switched converter or linear converter 22. In practical applications, when the battery pack 300 is in the fast charging phase, the control unit causes the switched capacitor converter 21 to operate to convert the bus voltage Vbus into the first output voltage Vout1 for charging the battery pack 300; when the battery pack 300 is in the trickle charge phase, the pre-charge phase or the cut-off charge phase, the control makes the switching converter or the linear converter 22 work to convert the bus voltage Vbus into the second output voltage Vout2 to charge the battery pack 300 so as to meet the requirements of different charge phases of the battery pack 300.
However, the battery pack charging system shown in fig. 1 requires two inverters to charge the battery pack 300, resulting in a bulky and costly battery pack charging system. And during the fast charging phase, the switched capacitor converter 21 is operated, so that only an adapter matched with the switched capacitor converter can be selected.
Therefore, the current power conversion structure cannot achieve the purposes of small size, low cost, high efficiency and compatibility with various types of adapters on the basis of meeting the requirement of quick charging.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power conversion structure, comprising: the input end is used for receiving an input voltage; the first switch series branch and the second switch series branch respectively comprise a plurality of switch tubes and first ends which are connected in series, the first switch series branch further comprises a first upper polar plate node and a first lower polar plate node, the second switch series branch further comprises a second upper polar plate node and a second lower polar plate node, the first switch series branch and the second switch series branch are respectively connected between the input end and the grounding end, and the first end of the first switch series branch and the first end of the second switch series branch are respectively connected to the second output end; the third switch series branch and the first flying capacitor are connected between the first upper polar plate node and the first lower polar plate node; the fourth switch series branch and the second flying capacitor are connected between the second upper pole plate node and the second lower pole plate node; the first end of the first inductor is connected with the first end of the third switch series branch, the first end of the second inductor is connected with the first end of the fourth switch series branch, and the second end of the first inductor and the second end of the second inductor are both connected to the first output end.
The present invention further provides a power conversion system, including: the power conversion structure described above; a control unit, connected to the control node of the switching tube in the power conversion structure, and outputting a switching control signal to the control node of the switching tube in the power conversion structure, so as to configure the power conversion structure to include a first operation mode and a second operation mode, wherein: in the first mode of operation, the first switched series leg, the third switched series leg and the first flying capacitor are configured as a switched capacitor converter and the second switched series leg, the fourth switched series leg and the second flying capacitor are configured as a switched capacitor converter; in the second mode of operation, the first switched series leg, the third switched series leg, the first flying capacitor and the first inductor are configured as a three-level buck converter, and the second switched series leg, the fourth switched series leg, the second flying capacitor and the second inductor are configured as a three-level buck converter.
The utility model also proposes an electronic device comprising: the power conversion structure described above; the first end of the battery pack is connected with the second output end and is connected with the first output end through a first switching tube, and the second end of the battery pack is grounded; a load connected to the first output terminal.
The utility model also proposes an electronic device comprising: in the power conversion structure, the second end of the first inductor forms the output terminal doutA, and the second end of the second inductor forms the output terminal doutB; the first end of the first battery pack is connected with the second output end and is connected with the output end doutB through a second switch tube, and the second end of the first battery pack is grounded; the first load is connected with the output end doutB; the first end of the second battery pack is connected with the output end doutA through a third switching tube, and the second end of the second battery pack is grounded; and the second load is connected to the output end doutA.
The utility model also provides a chip unit, comprising: the input pin is used for receiving an input voltage; a switching tube Q1A connected between the input pin and the first upper plate node, the switching tube Q1A having a control node dQ 1A; a switching tube Q2A connected between the first upper plate node and the first output pin, the switching tube Q2A having a control node dQ 2A; a switching tube Q3A connected between the first output pin and the first bottom plate node, the switching tube Q3A having a control node dQ 3A; a switching tube Q4A connected between the first bottom plate node and a ground pin, the switching tube Q4A having a control node dQ 4A; a switching tube Q5A connected between the first upper plate node and the first switching pin, the switching tube Q5A having a control node dQ 5A; a switching tube Q6A connected between the first switching pin and the first bottom plate node, the switching tube Q6A having a control node dQ 6A; a switching tube Q1B connected between the input pin and the second upper plate node, the switching tube Q1B having a control node dQ 1B; a switching tube Q2B connected between the second upper plate node and the first output pin, the switching tube Q2B having a control node dQ 2B; a switching tube Q3B connected between the first output pin and the second bottom plate node, the switching tube Q3B having a control node dQ 3B; a switch transistor Q4B connected between the second bottom plate node and ground, the switch transistor Q4B having a control node dQ 4B; a switching tube Q5B connected between the second upper plate node and the second switching pin, the switching tube Q5B having a control node dQ 5B; a switching tube Q6B connected between the second switching pin and the second bottom plate node, the switching tube Q6B having a control node dQ 6B; the first flying capacitor upper end pin is connected with the first upper electrode plate node and is used for connecting a first end of a first flying capacitor outside the chip unit; the lower end pin of the first flying capacitor is connected with the first lower electrode plate node and is used for connecting the second end of the first flying capacitor outside the chip unit; the upper end pin of the second flying capacitor is connected with the second upper electrode plate node and is used for connecting the first end of the second flying capacitor outside the chip unit; and the lower end pin of the second flying capacitor is connected with the second lower electrode plate node and is used for connecting a second end of the second flying capacitor outside the chip unit.
Drawings
Fig. 1 is a schematic diagram of a prior art battery charging system.
Fig. 2 is a block diagram of a typical electronic device charging system.
Fig. 3 is a schematic diagram of a power conversion structure according to an embodiment of the utility model.
Fig. 4a is a schematic diagram of an operating principle of the power conversion structure shown in fig. 3 according to an embodiment of the present invention.
Fig. 4b is a schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention.
Fig. 5 is a schematic diagram of a power conversion structure according to another embodiment of the utility model.
Fig. 6a is a schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention.
Fig. 6b is a schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention.
Fig. 6c is a schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention.
Fig. 6d is a schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention.
Fig. 6e is a schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention.
Fig. 7 is a schematic diagram of a power conversion system according to an embodiment of the utility model.
Fig. 8a is a schematic view of an electronic device according to an embodiment of the utility model.
Fig. 8b is a schematic diagram of an electronic device according to another embodiment of the utility model.
Fig. 9 is a schematic diagram of a power supply system according to an embodiment of the utility model.
Fig. 10 is a circuit diagram of a chip unit according to an embodiment of the utility model.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 2, which is a block diagram of a typical electronic device charging system, as shown in fig. 2, an adapter 10 provides a bus voltage Vbus to a power conversion structure 20, and the power conversion structure 20 converts the bus voltage Vbus into an output voltage Vout for charging a battery pack 300 in an electronic device. The adapters commonly used in the market at present have two types, one is an adapter with a digital control power supply (PPS) function, namely, a bus voltage Vbus provided by the adapter has a function of fine adjustment along with the voltage of the battery pack 300, so that the requirement on the voltage regulation function of the power conversion structure 20 is reduced, and a switch capacitor converter can be adopted to complete a quick charging function; another is an adapter without a digital control power supply (PPS) function, that is, the bus voltage Vbus provided by the adapter is a constant voltage, in order to meet the requirements of different charging voltages of the battery pack 300, a power conversion structure 20 with flexible output voltage regulation is required, for example, a three-level buck converter is adopted, however, the three-level buck converter has low efficiency and low power level, and cannot meet the requirement of quick charging of the battery pack. Therefore, the current power conversion structure cannot be compatible with various types of adapters on the basis of meeting the quick charging function.
In an embodiment of the present invention, a power conversion structure is provided, which can be applied to an electronic device, and specifically, referring to fig. 3, a power conversion structure according to an embodiment of the present invention includes: an input end din for receiving an input voltage Vin; the first switch series branch 110 and the second switch series branch 120 both include a plurality of switching tubes and first ends connected in series, the first switch series branch 110 further includes a first upper pole plate node dHA and a first lower pole plate node dLA, the second switch series branch 120 further includes a second upper pole plate node dHB and a second lower pole plate node dLB, the first switch series branch 110 and the second switch series branch 120 are both connected between an input end din and a ground end GND, and the first end dA1 of the first switch series branch 110 and the first end dB1 of the second switch series branch 120 are both connected to a second output end dout 2; a third switched series branch 130 and a first flying capacitor CfA, the third switched series branch 130 comprising a plurality of switching tubes connected in series and a first end d31, the third switched series branch 130 and the first flying capacitor CfA both connected between a first upper plate node dHA and a first lower plate node dLA; a fourth switch series branch 140 and a second flying capacitor CfB, where the fourth switch series branch 140 includes a plurality of switch tubes connected in series and a first end d41, and the fourth switch series branch 140 and the second flying capacitor CfB are both connected between a second upper plate node dHB and a second lower plate node dLB; a first terminal of the first inductor LA is connected to the first terminal d31 of the third switch series branch 130, a first terminal of the second inductor LB is connected to the first terminal d41 of the fourth switch series branch 140, and a second terminal of the first inductor LA and a second terminal of the second inductor LB are both connected to the first output terminal dout 1.
As such, the power conversion architecture described above may be configured to include two modes of operation. In the first operation mode, the first switching series branch 110, the third switching series branch 130 and the first flying capacitor CfA are configured as a switched capacitor converter, and the second switching series branch 120, the fourth switching series branch 140 and the second flying capacitor CfB are configured as a switched capacitor converter, and the two switched capacitor converters output the second output voltage Vout2 at the second output terminal dout2 to charge the battery pack, as shown in fig. 4a, which is an operation principle diagram of the power conversion structure shown in fig. 3 according to the embodiment of the present invention. Because two switch capacitor converters are connected in parallel, a larger power grade can be provided, the fast charging requirement can be met, the efficiency of the switch capacitor converter is higher, and the first working mode can be suitable for an external adapter with a digital control power supply (PPS) function. In the second operation mode, the first switching series branch 110, the third switching series branch 130, the first flying capacitor CfA and the first inductor LA are configured as a three-level buck converter, and the second switching series branch 120, the fourth switching series branch 140, the second flying capacitor CfB and the second inductor LB are configured as a three-level buck converter, which outputs the first output voltage Vout1 at the first output terminal dout1 to charge the battery pack, referring to the schematic operation diagram of the power conversion structure shown in fig. 3 of another embodiment of the present invention shown in fig. 4 b. Because two three-level buck converters are connected in parallel, a larger power grade can be provided, and therefore the requirement of quick charging can be met. The power conversion structure that so this application provided can satisfy the various types of adapters of compatibility on the basis of filling soon, and components and parts can multiplex in two kinds of mode, consequently can accomplish again small, with low costs.
Further, as shown in fig. 3, the power conversion structure 100 may further include a first output capacitor Cout1 and a second output capacitor Cout2, wherein the first output capacitor Cout1 is connected between the first output terminal dout1 and the ground terminal GND, and the second output capacitor Cout2 is connected between the second output terminal dout2 and the ground terminal GND, so as to implement the functions of filtering and voltage stabilization.
Further, referring to the schematic diagram of the power conversion structure shown in fig. 5 according to another embodiment of the present invention, the first switch series branch 110 includes a switch tube Q1A, a switch tube Q2A, a switch tube Q3A and a switch tube Q4A connected in series, the switch tube Q1A is connected between the input end din and the first upper plate node dHA, the switch tube Q1A has a control node dQ1A, the switch tube Q2A is connected between the first upper plate node dHA and the first end dA1 of the first switch series branch 110, the switch tube Q2A has a control node dQ2A, the switch tube Q3A is connected between the first end dA1 and the first lower plate node dLA of the first switch series branch 110, the switch tube Q3A has a control node dQ3A, the switch tube Q4A is connected between the first lower plate node dLA and the ground terminal GND, and the switch tube Q4A has a control node dQ 4A; the second switching series branch 120 includes a switching tube Q1B, a switching tube Q2B, a switching tube Q3B and a switching tube Q4B connected in series, the switching tube Q1B is connected between the input end din and the second upper plate node dHB, the switching tube Q1B has a control node dQ1B, the switching tube Q2B is connected between the second upper plate node dHB and the first end dB1 of the second switching series branch 120, the switching tube Q2B has a control node dQ2B, the switching tube Q3B is connected between the first end dB1 of the second switching series branch 120 and the second lower plate node dLB, the switching tube Q3B has a control node dQ3B, the switching tube Q4B is connected between the second lower plate node dLB and the ground terminal GND, and the switching tube Q4B has a control node dQ 4B.
Thus, the configuration is such that the switching transistors Q1A-Q4A operate, and the first flying capacitor CfA forms a switched capacitor converter; the configuration is such that the switches Q1B through Q4B operate, and the second flying capacitor CfB forms a switched capacitor converter. Specifically, the switching tubes Q1A and Q3A in the first switching series branch 110 are controlled to be turned on at the same time, and the switching tubes Q2A and Q4A are turned on at the same time, so that the switching tubes in the third switching series branch 130 are all turned off, thereby realizing the function of the switched capacitor converter; the switching tube Q1B and the switching tube Q3B in the second switch series branch 120 are turned on at the same time, and the switching tube Q2B and the switching tube Q4B are turned on at the same time, which are sequentially performed, and the switching tubes in the fourth switch series branch 140 are all turned off, so that the function of the switched capacitor converter is realized. Further, the switching tubes operating in the first switching series branch 110 and the switching tubes operating in the second switching series branch 120 are controlled to be out of phase by 180 degrees, so that the ripple of the second output voltage Vout2 is reduced. The switching tube Q1A through switching tube Q4A, the third switching series branch 130, the first flying capacitor CfA and the first inductor LA may form a three-level buck converter. Switching tube Q1B through switching tube Q4B, fourth switch series leg 140, second flying capacitor CfB and second inductor LB may form a three-level buck converter.
Further, referring to fig. 5, the third switching series branch 130 includes a switching tube Q5A and a switching tube Q6A connected in series, the switching tube Q5A is connected between the first upper plate node dHA and the first end of the third switching series branch 130 d31, the switching tube Q5A has a control node dQ5A, the switching tube Q6A is connected between the first end of the third switching series branch 130 d31 and the first lower plate node dLA, the switching tube Q6A has a control node dQ 6A; fourth switch series leg 140 includes a switch transistor Q5B and a switch transistor Q6B connected in series, switch transistor Q5B is connected between second upper plate node dHB and first end d41 of fourth switch series leg 140, switch transistor Q5B has a control node dQ5B, switch transistor Q6B is connected between first end d41 of fourth switch series leg 140 and second lower plate node dLB, and switch transistor Q6B has a control node dQ 6B. In this way, the switch Q1A through the switch Q6A, the first flying capacitor CfA and the first inductor LA may form a three-level buck converter, and the switch Q1B through the switch Q6B, the second flying capacitor CfB and the second inductor LB may form a three-level buck converter. Specifically, the function of the three-level buck converter can be realized by controlling to simultaneously conduct the switching tube Q1A and the switching tube Q6A, simultaneously conduct the switching tube Q6A and the switching tube Q4A, simultaneously conduct the switching tube Q5A and the switching tube Q4A, and simultaneously conduct the switching tube Q6A and the switching tube Q4A; the three-level buck converter can be controlled to be conducted sequentially by simultaneously conducting the switch tube Q1B and the switch tube Q6B, simultaneously conducting the switch tube Q6B and the switch tube Q4B, simultaneously conducting the switch tube Q5B and the switch tube Q4B, and simultaneously conducting the switch tube Q6B and the switch tube Q4B. Furthermore, the switching tube operating from the switching tube Q1A to the switching tube Q6A and the switching tube operating from the switching tube Q1B to the switching tube Q6B are out of phase by 180 degrees, so as to reduce the ripple of the first output voltage Vout 1.
In practical applications, the first switching series branch 110, the second switching series branch 120, the third switching series branch 130 and the fourth switching series branch 140 are not limited to the specific structure shown in fig. 5 as long as the functions can be achieved.
As shown in fig. 5, the first switching series branch 110, the third switching series branch 130, the first flying capacitor CfA and the first inductor LA form an a-phase converter, the second switching series branch 120, the fourth switching series branch 140, the second flying capacitor CfB and the second inductor LB form a B-phase converter, and the a-phase converter and the B-phase converter have the same structure and the same working principle, and output terminals thereof are connected in parallel. Of course, in an embodiment of the present application, the power conversion structure may further include a plurality of inverters identical to the a-phase inverter, and connected in parallel with the a-phase inverter. Fig. 5 illustrates the principle in two phases only.
In practical application, referring to the schematic diagram of the operation principle of the power conversion structure shown in fig. 3 of another embodiment of the present invention shown in fig. 6a, the a-phase converter and the B-phase converter can also be configured as a typical Buck converter to meet different requirements of the market. In addition, referring to fig. 5, taking an a-phase converter as an example, in practical application, the working mode of a typical Buck converter can be realized by configuring the switching tube Q1A and the switching tube Q5A to be simultaneously turned on, and the switching tube Q6A and the switching tube Q4A to be simultaneously turned on; the switching tube Q1A and the switching tube Q4A are also configured to be connected in a straight-through mode, and the switching tube Q5A and the switching tube Q6A are conducted alternately, so that the working mode of the typical Buck converter is realized. The working principle of the B-phase converter is the same as that of the A-phase converter, and the description is omitted.
In practical applications, referring to the schematic diagram of the operation principle of the power conversion structure shown in fig. 3 of another embodiment of the present invention shown in fig. 6B, the a-phase converter may be further configured as a switched capacitor converter to output the second output voltage Vout2 at the second output terminal dout2, and the B-phase converter may be configured as a three-level buck converter to output the first output voltage Vout1 at the first output terminal dout 1. Referring to fig. 6c, the schematic diagram of the operation principle of the power conversion structure shown in fig. 3 according to another embodiment of the present invention, the a-phase converter may be further configured as a three-level buck converter to output a first output voltage Vout1 at the first output terminal dout1, and the B-phase converter may be configured as a switched capacitor converter to output a second output voltage Vout2 at the second output terminal dout 2. Referring to fig. 6d, which is a schematic diagram illustrating the operation of the power conversion structure shown in fig. 3 according to another embodiment of the present invention, the a-phase converter may be further configured as a switched capacitor converter to output a second output voltage Vout2 at the second output terminal dout2, and the B-phase converter may be configured as a typical Buck converter to output a first output voltage Vout1 at the first output terminal dout 1. Referring to fig. 6e, which is a schematic diagram illustrating the operation of the power conversion structure shown in fig. 3 according to another embodiment of the present invention, the a-phase converter may be further configured as a typical Buck converter to output a first output voltage Vout1 at a first output terminal dout1, and the B-phase converter may be configured as a switched capacitor converter to output a second output voltage Vout2 at a second output terminal dout 2. Therefore, the first output terminal dout1 and the second output terminal dout2 can be connected to different battery packs to charge different battery packs, so as to meet the charging requirement of the same electronic device with a plurality of battery packs.
In an embodiment of the present invention, a power conversion system is provided, referring to fig. 7, which is a schematic diagram of a power conversion system according to an embodiment of the present invention, the power conversion system includes a power conversion structure 100 shown in fig. 3; a control unit 400, the control unit 400 connecting control nodes of the switching tubes within the power conversion structure 100 and outputting switching control signals to the control nodes of the switching tubes within the power conversion structure 100, so as to configure the power conversion structure 100 to include a first operating mode and a second operating mode, in the first operating mode, the first switching series branch 110, the third switching series branch 130 and the first flying capacitor CfA are configured as a switched capacitor converter, and the second switching series branch 120, the fourth switching series branch 140 and the second flying capacitor CfB are configured as a switched capacitor converter; in a second mode of operation, the first switched series leg 110, the third switched series leg 130, the first flying capacitor CfA and the first inductor LA are configured as a three-level buck converter, and the second switched series leg 120, the fourth switched series leg 140, the second flying capacitor CfB and the second inductor LB are configured as a three-level buck converter.
The operation principle and advantages of the power conversion system are the power conversion structure as described above, and are not described herein again.
In addition, since the a-phase inverter and the B-phase inverter are independent of each other, the control unit 400 may independently control according to sampling signals of respective phases of the a-phase inverter and the B-phase inverter, that is, the present invention provides a simple control of the power conversion structure.
In one embodiment, an electronic device 40 is provided, and the electronic device 40 may be, for example, a portable device (including a mobile phone, a tablet computer, a digital camera, an MP3 player, a watch, and/or other similar electronic devices). Specifically, referring to the schematic diagram of the electronic device shown in fig. 8a according to an embodiment of the utility model, the electronic device includes the power conversion structure 100 shown in fig. 3; the battery pack 300, the first end of the battery pack 300 is connected to the second output terminal dout2 and is connected to the first output terminal dout1 through a first switch tube Q1, and the second end of the battery pack 300 is grounded; and a load 200, wherein the load 200 is connected with the first output terminal dout 1.
The load 200 may be a power consuming unit of an electronic device, such as a portable device (including a mobile phone, a tablet computer, a digital camera, an MP3 player, a watch, and/or other similar electronic devices). Battery pack 300 may be a rechargeable battery pack within an electronic device, such as a rechargeable battery pack within a portable device (including a mobile phone, tablet, digital camera, MP3 player, watch, and/or other similar electronic devices).
Referring to the schematic diagram of the power system shown in fig. 9, in practical applications, when the power consuming unit in the electronic device 40 needs to be powered and/or the battery pack 300 in the electronic device needs to be charged, the adapter 30 is connected to the electronic device 40 to provide the input voltage Vin to the input end din of the power conversion structure, and the controller 400 configures the power conversion structure 100 to operate in a corresponding mode in response to different charging conditions of the battery pack 300 and the type of the adapter.
The entire charging process of the battery pack 300 includes a trickle charge stage, a pre-charge stage, a constant current charge stage, a constant voltage charge stage, and a cut-off charge stage. In practical embodiments, the first operation mode and the second operation mode are used for performing any one of a first phase of constant voltage charging and constant current charging, i.e., a fast charging phase, on the battery pack 300. In practical embodiments, the a-phase converter or the B-phase converter may be configured as a three-level buck converter, and the other converter may be configured not to operate, and perform any one of the second stage of trickle charge, pre-charge, constant-voltage charge, and turn-off charge for the battery pack 300; alternatively, both the a-phase converter and the B-phase converter are configured as three-level step-down converters, and the battery pack 300 is subjected to any one of the second stage of trickle charge, pre-charge, constant-voltage charge, and off-charge. Wherein the first phase of the constant voltage charging phase and the second phase of the constant voltage charging phase form a constant voltage charging phase of the battery pack. The power conversion structure that so this application provided can all realize high efficiency at the overall process of charging of group battery 300, at the various types of adapters of the stage compatibility of filling soon to components and parts can multiplex, consequently can accomplish again small, with low costs.
In practical applications, the first phase of the constant voltage charging refers to a phase in which the charging current is reduced from the current at the time of the constant current charging phase to a predetermined current value, and the second phase of the constant voltage charging refers to a phase in which the charging current is reduced from the predetermined current value to 0 ampere or the current of the charging phase is cut off. In one embodiment of the utility model, the predetermined current value is 6 amps.
In the above embodiments, the first switching tube Q1 is configured to be turned on to supply power to the power consuming unit (i.e., the load 200) of the electronic device, and simultaneously, the battery pack 300 of the electronic device is charged or the battery pack 300 of the electronic device is used to supply power to the load 200, and the first switching tube Q1 is configured to be turned off to supply power to only the power consuming unit (i.e., the load 200) of the electronic device, that is, the first switching tube Q1 is configured to perform the function of power path management.
In another embodiment of the present invention, another electronic device 40' is provided. Specifically, referring to the schematic diagram of the electronic device shown in fig. 8b according to another embodiment of the present invention, the electronic device includes the power conversion structure 100 shown in fig. 3, wherein the second end of the first inductor LA forms the output terminal doutA, and the second end of the second inductor LB forms the output terminal doutB; first battery pack 301, wherein a first end of first battery pack 301 is connected to second output terminal dout2, and is connected to output terminal doutB through a second switch tube Q2, and a second end of first battery pack 301 is grounded; the first load 201, the first load 201 connects the output end doutB; second battery pack 302, wherein a first end of second battery pack 302 is connected to output terminal doutA through third switching tube Q3, and a second end of second battery pack 302 is grounded; and a second load 202, wherein the second load 202 is connected to the output terminal doutA.
I.e. the electronic device 40' comprises two battery packs. In practical applications, as shown in fig. 8b, the output terminal doutB is used for performing any one of the second stages of trickle charge, pre-charge, constant voltage charge and cut-off charge on the first battery pack 301, and the second output terminal dout2 is used for performing any one of the first stage of constant voltage charge and constant current charge, i.e. fast charge stage, on the first battery pack 301; output doutA is used to charge second battery pack 302 in the whole process, so as to charge two battery packs in the same electronic device. Alternatively, and in contrast to fig. 8b, output doutB is used to perform the entire charging process for second battery pack 302, and output doutA is used to perform any of the second stages of trickle charge, pre-charge, constant voltage charge, and cutoff charge for first battery pack 301.
In an embodiment of the utility model, the switching tubes are MOSFETs, and each of the switching tubes includes a source, a drain and a gate. The drain of the switching tube Q1A is connected to the input end din, the source of the switching tube Q1A is connected to the drain of the switching tube Q2A, the source of the switching tube Q2A is connected to the drain of the switching tube Q3A, the source of the switching tube Q3A is connected to the drain of the switching tube Q4A, the source of the switching tube Q4A is grounded, the drain of the switching tube Q5A is connected to the source of the switching tube Q1A, the source of the switching tube Q5A is connected to the drain of the switching tube Q6A, and the source of the switching tube Q6A is connected to the drain of the switching tube Q4A. The connection relationship between the switch transistor Q1B and the switch transistor Q6B and the connection relationship between the switch transistor Q1A and the switch transistor Q6A are the same, and are not described in detail herein. The drains of the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 are connected with corresponding loads, and the sources are connected with corresponding battery packs and all have control nodes.
In an embodiment of the utility model, the switch transistor may also be a bipolar junction transistor, a super junction transistor, an insulated gate bipolar transistor, a gallium nitride-based power device, and/or the like. The switch can be turned on or off by receiving a switch control signal.
In an embodiment of the present invention, the switch tubes are implemented by including a single switch tube, and in practical applications, each switch tube may include a plurality of switch tubes connected in series and/or in parallel.
Specifically, the switching tube works to receive a switching control signal and switch between on and off.
In an embodiment of the present invention, a chip unit is further provided, and specifically, please refer to fig. 10 for a circuit schematic diagram of the chip unit according to an embodiment of the present invention. As shown in fig. 10, the chip unit 500 includes: an input pin Vbus, a first conversion pin SW1, a second conversion pin SW2, a ground pin GND, a first flying capacitor upper end pin CFHA, a first flying capacitor lower end pin CFLA, a second flying capacitor upper end pin CFHB, a second flying capacitor lower end pin CFLB, and a first output pin Vo1, wherein the chip unit 500 is integrated with: a switching tube Q1A connected between the input pin Vbus and the first upper plate node dHA, the switching tube Q1A having a control node dQ 1A; a switching tube Q2A connected between the first upper plate node dHA and the first output pin Vo1, the switching tube Q2A having a control node dQ 2A; a switching tube Q3A connected between the first output pin Vo1 and the first bottom plate node dLA, the switching tube Q3A having a control node dQ 3A; the switching tube Q4A is connected between the first bottom plate node dLA and the ground pin GND, and the switching tube Q4A is provided with a control node dQ 4A; a switching tube Q5A connected between the first upper plate node dHA and the first switch pin SW1, the switching tube Q5A having a control node dQ 5A; a switching tube Q6A connected between the first switching pin SW1 and the first bottom plate node dLA, the switching tube Q6A having a control node dQ 6A; a switching tube Q1B connected between the input pin Vbus and the second upper plate node dHB, the switching tube Q1B having a control node dQ 1B; a switching tube Q2B connected between the second upper plate node dHB and the first output pin Vo1, the switching tube Q2B having a control node dQ 2B; a switching tube Q3B connected between the first output pin Vo1 and the second bottom plate node dLB, the switching tube Q3B having a control node dQ 3B; the switching tube Q4B is connected between the second bottom plate node dLB and the ground pin GND, and the switching tube Q4B is provided with a control node dQ 4B; a switching tube Q5B connected between the second upper plate node dHB and the second switching pin SW2, the switching tube Q5B having a control node dQ 5B; a switching tube Q6B connected between the second switching pin SW2 and the second bottom plate node dLB, the switching tube Q6B having a control node dQ 6B; a first flying capacitor upper end pin CFHA connected to the first upper plate node dHA for connecting a first end of the first flying capacitor CfA located outside the chip unit 500; a first flying capacitor lower end pin CFLA connected to the first lower plate node dLA for connecting to a second end of the first flying capacitor CfA outside the chip unit 500; a pin CFHB at the upper end of the second flying capacitor, connected to the second upper plate node dHB, and configured to connect to a first end of the second flying capacitor CfB located outside the chip unit 500; a second flying capacitor lower end pin CFLB is connected to the second lower plate node dLB, and is used for connecting a second end of the second flying capacitor CfB outside the chip unit 500.
The principle and effect are the same as the power conversion structure described above, and are not described in detail here.
Further, referring to fig. 10, the first switch pin SW1 of the chip unit 500 is used for connecting the first inductor LA outside the chip unit 500, and the second switch pin SW2 is used for connecting the second inductor LB outside the chip unit 500. The first output pin Vo1 of the chip unit 500 is used for connecting one end of the second output capacitor Cout2 located outside the chip unit 500, and the other end of the second output capacitor Cout2 is grounded.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A power conversion structure, comprising:
the input end is used for receiving an input voltage;
the first switch series branch and the second switch series branch respectively comprise a plurality of switch tubes and first ends which are connected in series, the first switch series branch further comprises a first upper polar plate node and a first lower polar plate node, the second switch series branch further comprises a second upper polar plate node and a second lower polar plate node, the first switch series branch and the second switch series branch are respectively connected between the input end and the grounding end, and the first end of the first switch series branch and the first end of the second switch series branch are respectively connected to the second output end;
the third switch series branch and the first flying capacitor are connected between the first upper polar plate node and the first lower polar plate node;
the fourth switch series branch and the second flying capacitor are connected between the second upper pole plate node and the second lower pole plate node;
the first end of the first inductor is connected with the first end of the third switch series branch, the first end of the second inductor is connected with the first end of the fourth switch series branch, and the second end of the first inductor and the second end of the second inductor are both connected to the first output end.
2. The power conversion architecture of claim 1, wherein the first switch series leg includes a switch Q1A, a switch Q2A, a switch Q3A, and a switch Q4A connected in series, the switch Q1A being connected between the input terminal and the first upper plate node, the switch Q1A having a control node dQ1A, the switch Q2A being connected between the first upper plate node and the first end of the first switch series leg, the switch Q2A having a control node dQ2A, the switch Q3A being connected between the first end of the first switch series leg and the first lower plate node, the switch Q3A having a control node dQ3A, the switch Q4A being connected between the first lower plate node and the ground terminal, the switch Q4A having a control node dQ 4A;
the second switch series branch comprises a switch tube Q1B, a switch tube Q2B, a switch tube Q3B and a switch tube Q4B connected in series, the switch tube Q1B is connected between the input end and the second upper pole plate node, the switch tube Q1B has a control node dQ1B, the switch tube Q2B is connected between the second upper pole plate node and the first end of the second switch series branch, the switch tube Q2B has a control node dQ2B, the switch tube Q3B is connected between the first end of the second switch series branch and the second lower pole plate node, the switch tube Q3B has a control node dQ3B, the switch tube Q4B is connected between the second lower pole plate node and the ground end, and the switch tube Q4B has a control node dQ 4B.
3. The power conversion architecture of claim 2, wherein the third switching series leg includes a switching tube Q5A and a switching tube Q6A connected in series, the switching tube Q5A being connected between the first upper plate node and the first end of the third switching series leg, the switching tube Q5A having a control node dQ5A, the switching tube Q6A being connected between the first end of the third switching series leg and the first lower plate node, the switching tube Q6A having a control node dQ 6A;
the fourth switch series branch comprises a switch tube Q5B and a switch tube Q6B which are connected in series, the switch tube Q5B is connected between the second upper plate node and the first end of the fourth switch series branch, the switch tube Q5B has a control node dQ5B, the switch tube Q6B is connected between the first end of the fourth switch series branch and the second lower plate node, and the switch tube Q6B has a control node dQ 6B.
4. The power conversion structure of claim 1, wherein the power conversion structure is configured to operate in a first mode of operation in which the first switched series branch, the third switched series branch and the first flying capacitor are configured as a switched capacitor converter; the second switch series branch, the fourth switch series branch, and the second flying capacitor are configured as a switched capacitor converter.
5. The power conversion structure of claim 1, wherein the power conversion structure is configured to operate in a second mode of operation in which the first switched series leg, the third switched series leg, the first flying capacitor, and the first inductor are configured as a three-level buck converter; the second switch series leg, the fourth switch series leg, the second flying capacitor, and the second inductor are configured as a three-level buck converter.
6. A power conversion system, comprising:
the power conversion structure of claim 1;
a control unit, connected to the control node of the switching tube in the power conversion structure, and outputting a switching control signal to the control node of the switching tube in the power conversion structure, so as to configure the power conversion structure to include a first operation mode and a second operation mode, wherein:
in the first mode of operation, the first switched series leg, the third switched series leg and the first flying capacitor are configured as a switched capacitor converter and the second switched series leg, the fourth switched series leg and the second flying capacitor are configured as a switched capacitor converter;
in the second mode of operation, the first switched series leg, the third switched series leg, the first flying capacitor and the first inductor are configured as a three-level buck converter, and the second switched series leg, the fourth switched series leg, the second flying capacitor and the second inductor are configured as a three-level buck converter.
7. An electronic device, comprising:
the power conversion structure of claim 1;
the first end of the battery pack is connected with the second output end and is connected with the first output end through a first switching tube, and the second end of the battery pack is grounded;
a load connected to the first output terminal.
8. An electronic device, comprising:
the power conversion structure of claim 1, wherein the second terminal of the first inductor forms output terminal doutA and the second terminal of the second inductor forms output terminal doutB;
the first end of the first battery pack is connected with the second output end and is connected with the output end doutB through a second switch tube, and the second end of the first battery pack is grounded;
the first load is connected with the output end doutB;
the first end of the second battery pack is connected with the output end doutA through a third switching tube, and the second end of the second battery pack is grounded;
and the second load is connected to the output end doutA.
9. A chip unit, comprising:
the input pin is used for receiving an input voltage;
a switching tube Q1A connected between the input pin and the first upper plate node, the switching tube Q1A having a control node dQ 1A;
a switching tube Q2A connected between the first upper plate node and the first output pin, the switching tube Q2A having a control node dQ 2A;
a switching tube Q3A connected between the first output pin and the first bottom plate node, the switching tube Q3A having a control node dQ 3A;
a switching tube Q4A connected between the first bottom plate node and a ground pin, the switching tube Q4A having a control node dQ 4A;
a switching tube Q5A connected between the first upper plate node and the first switching pin, the switching tube Q5A having a control node dQ 5A;
a switching tube Q6A connected between the first switching pin and the first bottom plate node, the switching tube Q6A having a control node dQ 6A;
a switching tube Q1B connected between the input pin and the second upper plate node, the switching tube Q1B having a control node dQ 1B;
a switching tube Q2B connected between the second upper plate node and the first output pin, the switching tube Q2B having a control node dQ 2B;
a switching tube Q3B connected between the first output pin and the second bottom plate node, the switching tube Q3B having a control node dQ 3B;
a switch transistor Q4B connected between the second bottom plate node and ground, the switch transistor Q4B having a control node dQ 4B;
a switching tube Q5B connected between the second upper plate node and the second switching pin, the switching tube Q5B having a control node dQ 5B;
a switching tube Q6B connected between the second switching pin and the second bottom plate node, the switching tube Q6B having a control node dQ 6B;
the first flying capacitor upper end pin is connected with the first upper electrode plate node and is used for connecting a first end of a first flying capacitor outside the chip unit;
the lower end pin of the first flying capacitor is connected with the first lower electrode plate node and is used for connecting the second end of the first flying capacitor outside the chip unit;
the upper end pin of the second flying capacitor is connected with the second upper electrode plate node and is used for connecting the first end of the second flying capacitor outside the chip unit;
and the lower end pin of the second flying capacitor is connected with the second lower electrode plate node and is used for connecting a second end of the second flying capacitor outside the chip unit.
10. The chip unit according to claim 9, wherein the first switch pin is configured to connect to a first inductor located outside the chip unit, and the second switch pin is configured to connect to a second inductor located outside the chip unit.
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| CN202220721274.XU CN216414180U (en) | 2022-03-31 | 2022-03-31 | Power conversion structure, system, electronic device and chip unit |
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| CN202220721274.XU CN216414180U (en) | 2022-03-31 | 2022-03-31 | Power conversion structure, system, electronic device and chip unit |
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Address after: Room 01, Floor 5, Building B4, Zhong'an Chuanggu Science Park, No. 900, Wangjiang West Road, High tech Zone, Hefei, Anhui, 230088 Patentee after: Voda Semiconductor (Hefei) Co.,Ltd. Address before: 230088 room f1-605 / 606, phase II, innovation industrial park, 2800 innovation Avenue, high tech Zone, Hefei City, Anhui Province Patentee before: Voda semiconductor (Hefei) Co.,Ltd. |