Multi-channel power input double-battery power supply system

Abstract

The invention discloses a multi-channel power input double-battery power supply system, which relates to the technical field of power supply circuits, uses a hardware circuit to compare a first battery voltage with a constant value and control battery discharge logic, and does not need software to carry out logic control on the system. Therefore, double-battery charging and discharging can be completed by using fewer software resources and hardware resources, and the function of replacing the battery without power failure is realized. Meanwhile, the system supports selection input of multiple power input interfaces, and it is guaranteed that different charging modes and different charging protocols can be matched in practical application.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuits, and in particular to a multi-channel power input dual-battery power supply system. Background Art

[0002] RK3588 is a low-power, high-performance processor suitable for ARM-based PCs and edge computing devices, personal mobile Internet devices and other digital multimedia applications. It integrates a quad-core Cortex-A76 and a quad-core Cortex-A55, each with a NEON coprocessor. It supports 8K video codecs, introduces a new generation of image signal processors with a maximum of 48 million pixels, and has a built-in NPU that supports INT4 / INT8 / INT16 / FP16 mixed operations, with a computing power of up to 6TOPs and strong compatibility. It has a very rich expansion interface and a highly integrated SoC design, which can effectively reduce costs.

[0003] The existing RK3588 platform equipment power supply circuit generally adopts the following discharge control logic:

[0004] 1. Similar to the single-battery charging and discharging mode of conventional mobile devices.

[0005] 2. In addition to the CPU, a dual-battery charge and discharge logic controlled by a single-chip microcomputer is used to compare the battery voltages to control the power supply switching of the dual batteries.

[0006] 3. The nested dual-battery charging logic is used to charge the dual batteries. First, the battery one is powered by the charge and discharge circuit one, and then after passing through the system power supply, the system power supply is boosted and charged by the charge and discharge circuit two.

[0007] However, conventional power supply circuits have certain defects, such as:

[0008] 1. The conventional single-battery charging and discharging mode cannot maintain seamless battery life when the battery cannot be charged for a long time.

[0009] 2. Using a single-chip microcomputer for battery control requires additional software workload. At the same time, if the device software resources are tight or the space is limited, it is difficult to use a single-chip microcomputer for control in this scenario, and this solution cannot be used.

[0010] 3. The nested charging logic will undergo two-stage DCDC conversion, which greatly reduces the power efficiency. This solution is generally used in scenarios where battery one can charge battery two at the same time, but the life of battery one will be greatly reduced in this scenario. Summary of the invention

[0011] In view of the above problems, the present invention provides a multi-channel power input dual battery power supply system for overcoming the above problems or at least partially solving the above problems.

[0012] The present invention provides the following scheme:

[0013] A multi-channel power input dual battery power supply system, comprising:

[0014] A power switch, a first charge and discharge circuit, a second charge and discharge circuit, a first battery, a second battery, a DCDC power supply module, a comparator, and a constant voltage power supply;

[0015] The power switch is connected to at least one power interface, and the power interface is used to connect to an external power supply; the input ends of the first charge and discharge circuit and the second charge and discharge circuit are respectively connected to the power switch, the first charge and discharge circuit is respectively connected to the first battery and the DCDC power module, and the second charge and discharge circuit is connected to the second battery and connected to the DCDC power module through the battery switch; the comparator is respectively connected to the first battery and the constant voltage power supply;

[0016] The power supply method of the power supply system comprises:

[0017] After the external power is input through the target power interface, the power switch controls the target power interface to be turned on; the target power interface is one of at least one of the power interfaces;

[0018] The first charge and discharge circuit controls the external power supply to charge the first battery and enables the external power supply to enter the DCDC power supply module to power the system;

[0019] The second charge and discharge circuit controls the external power supply to charge the second battery, and controls the battery switch to be turned off through the comparator;

[0020] After the first charge and discharge circuit determines that there is no input from the external power supply, the first battery is controlled to discharge to generate a first discharge power supply, so that the first discharge power supply enters the DCDC power supply module to power the system;

[0021] After the second charge and discharge circuit determines that there is no input from the external power supply, the second battery is controlled to discharge to generate a second discharge power supply, and the battery switch is kept closed;

[0022] When the comparator determines that the voltage value of the first discharge power supply is lower than the voltage value of the constant voltage power supply, the comparator controls the battery switch to open, so that the second discharge power supply enters the DCDC power supply module to power the system.

[0023] Preferably, the power switch controls the target power interface to be turned on and then controls the other power interfaces to be turned off.

[0024] Preferably: it also includes an RK3588 processor, and the RK3588 processor is connected to the power switch, the first battery and the second battery respectively.

[0025] Preferably: the first charge and discharge circuit and the second charge and discharge circuit include an anti-backflow circuit.

[0026] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0027] The embodiment of the present application provides a multi-channel power input dual-battery power supply system, which uses a hardware circuit to compare the first battery voltage with a constant value and control the battery discharge logic, without the need for software to perform logic control. This ensures that the dual battery charging and discharging can be completed with fewer software resources and hardware resources, and the function of replacing batteries without power failure is realized. At the same time, the system supports multiple power input interface selection inputs, ensuring that different forms of charging methods and different charging protocols can be matched in actual applications.

[0028] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a connection block diagram of a multi-channel power input dual battery power supply system provided by an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the charge and discharge control logic provided by an embodiment of the present invention.

[0032] In the figure: power switch 1, first charge and discharge circuit 2, second charge and discharge circuit 3, first battery 4, second battery 5, DCDC power module 6, comparator 7, constant voltage power supply 8, power interface 9, battery switch 10, RK3588 processor 11, system power supply 12. DETAILED DESCRIPTION

[0033] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0034] See also Figure 1 , is a multi-channel power input dual battery power supply system provided by an embodiment of the present invention, such as Figure 1 As shown, the system may include:

[0035] A power switch 1, a first charge and discharge circuit 2, a second charge and discharge circuit 3, a first battery 4, a second battery 5, a DCDC power supply module 6, a comparator 7 and a constant voltage power supply 8;

[0036] The power switch 1 is connected to at least one power interface 9, and the power interface 9 is used to connect to an external power supply; the input ends of the first charge and discharge circuit 2 and the second charge and discharge circuit 3 are respectively connected to the power switch 1, the first charge and discharge circuit 2 is respectively connected to the first battery 4 and the DCDC power module 6, and the second charge and discharge circuit 3 is connected to the second battery 5 and connected to the DCDC power module 6 through the battery switch 10; the comparator 7 is respectively connected to the first battery 4 and the constant voltage power supply 8;

[0037] The power supply method of the power supply system comprises:

[0038] After the external power supply is input through the target power interface, the power switch 1 controls the target power interface to be turned on; the target power interface is one of at least one of the power interfaces 9; in specific implementation, the present application can provide that the power switch 1 controls the target power interface to be turned on and then controls the other power interfaces 9 to be turned off.

[0039] The first charge and discharge circuit 2 controls the external power supply to charge the first battery 4 and enables the external power supply to enter the DCDC power supply module 6 to power the system;

[0040] The second charge and discharge circuit 3 controls the external power supply to charge the second battery 5, and controls the battery switch 10 to be turned off through the comparator 7;

[0041] After the first charge and discharge circuit 2 determines that there is no input from the external power supply, it controls the first battery 4 to discharge to generate a first discharge power supply, so that the first discharge power supply enters the DCDC power supply module 6 to power the system;

[0042] After the second charge and discharge circuit 3 determines that there is no input from the external power source, it controls the second battery 5 to discharge to generate a second discharge power source, and keeps the battery switch 10 closed;

[0043] When the comparator 7 determines that the voltage value of the first discharge power supply is lower than the voltage value of the constant voltage power supply 8, the comparator 7 controls the battery switch 10 to open, so that the second discharge power supply enters the DCDC power supply module 6 to power the system.

[0044] The embodiment of the present application may further provide an RK3588 processor 11, and the RK3588 processor 11 is connected to the power switch 1, the first battery 4 and the second battery 5 respectively.

[0045] In order to further prevent current backflow, the embodiment of the present application may provide that the first charge and discharge circuit 2 and the second charge and discharge circuit 3 include an anti-backflow circuit.

[0046] The system provided by the present invention realizes multi-way power supply switchable input and dual-battery power supply seamless battery life in the scenario of tight software resources and hardware space. The input power is selected by using the power switch 1 to realize multi-way power supply selection input. The multi-way power supply interface 9 is selected for input by using the power switch 1. The voltage VBAT1 of the replaceable first battery 4 is compared with the constant voltage VAL by using the voltage comparator 7, so as to control the discharge path of the second battery 5. Since the hardware circuit is used to compare the voltage of the battery 1 with the constant value and control the battery discharge logic, there is no need for software to perform logic control on it.

[0047] The system provided in the embodiment of the present application uses a power switch 1 to select the input power supply to realize multi-way power selection input. After the power is input, battery 1 and battery 2 are charged at the same time, and the system is powered. When the external power input is disconnected, battery 1 directly starts to discharge the system, and at the same time controls the discharge of battery 2 by comparing the result of battery 1 voltage VBAT1 with the constant value VAL. At this time, battery 1 can be replaced to achieve seamless system endurance.

[0048] Modular and hierarchical design is adopted in electrical schematic design. Modular design is adopted in PCB design, and all parameters are kept consistent. The charging and discharging circuit needs to have an anti-reverse design to prevent the back-end voltage from flowing back.

[0049] like Figure 2 As shown in the figure, the process actually used by the system includes:

[0050] a. When external power is input.

[0051] 101: After the external power is input into the device through the power interface 9, the interface corresponding to the power input is selected through the power switch 1, and the interface without power input is closed at the same time to prevent the power interface 9 from leaking electricity;

[0052] 102: The external power source enters the first charge and discharge circuit 2 through the power switch 1;

[0053] 103: The external power source enters the second charge and discharge circuit 3 through the power switch 1;

[0054] 104: the external power source charges the first battery 4 through the first charging and discharging circuit 2;

[0055] 105: the external power source charges the second battery 5 through the second charging and discharging circuit 3;

[0056] 106: The external power enters the DCDC power module 6 through the first charge and discharge circuit 2;

[0057] 107: DCDC power module 6 processes the power and supplies power to the system;

[0058] 108: The battery switch 10 is not turned on, and the power supply cannot supply power to the DCDC power module 6 through the second charge and discharge circuit 3, and will not interfere with the back end.

[0059] b. When there is no external power input and the first battery 4 is discharged.

[0060] 201: After determining that there is no external power input, the first charge and discharge circuit 2 controls the first battery 4 to discharge to generate a first discharge power supply.

[0061] 202: The first discharging power source enters the DCDC module through the first charging and discharging circuit 2.

[0062] 203: The DCDC module processes the first discharge power to supply power to the system.

[0063] 204: After the second charge and discharge circuit 3 determines that there is no input of the external power supply, it controls the second battery 5 to discharge to generate a second discharge power supply;

[0064] 205: Since the battery switch 10 is not turned on, the second discharge power supply cannot supply power through the second charge and discharge circuit 3 and will not interfere with the back end.

[0065] c. When there is no external power input and the first battery 4 is low on power or has been removed.

[0066] 301: the first discharge power generated by the first battery 4 is input into the comparator 7;

[0067] 302: constant voltage power supply 8 inputs comparator 7;

[0068] 303: When the voltage of the first battery 4 is lower than the value of the constant voltage power supply 8, it is determined that the first battery 4 cannot supply power (low power or the battery is removed), and at this time the comparator 7 controls the battery switch 10 to open.

[0069] 304 : After the switch of the second battery 5 is turned on, the power is no longer blocked from passing through the second charge and discharge circuit 3 . At this time, the power of the second battery 5 can enter the DCDC power module 6 .

[0070] 305: The DCDC module processes the second discharge power to supply power to the system.

[0071] d. The processor collects information.

[0072] C1: Power switch 1 feeds back the specific power input interface information to the processor;

[0073] C2: the second battery 5 feeds back the second battery 5 status information to the processor;

[0074] C1: The first battery 4 feeds back the first battery 4 status information to the processor.

[0075] In summary, the multi-channel power input dual-battery power supply system provided by the present application uses a hardware circuit to compare the first battery voltage with a constant value and control the battery discharge logic, and does not require software to perform logic control. This ensures that the dual-battery charging and discharging can be completed with fewer software and hardware resources, and the function of replacing batteries without power failure is realized. At the same time, the system supports a variety of power input interface selection inputs, ensuring that different forms of charging methods and different charging protocols can be matched in actual applications.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0077] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0078] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A multi-channel power input dual battery power supply system, characterized in that: It includes a power switch, a first charging and discharging circuit, a second charging and discharging circuit, a first battery, a second battery, a DCDC power supply module, a comparator and a constant voltage power supply; The power switch is connected to at least one power interface, and the power interface is used to connect to an external power supply; the input ends of the first charge and discharge circuit and the second charge and discharge circuit are respectively connected to the power switch, the first charge and discharge circuit is respectively connected to the first battery and the DCDC power module, and the second charge and discharge circuit is connected to the second battery and connected to the DCDC power module through the battery switch; the comparator is respectively connected to the first battery and the constant voltage power supply; The power supply method of the power supply system comprises: After the external power is input through the target power interface, the power switch controls the target power interface to be turned on; the target power interface is one of at least one of the power interfaces; The first charge and discharge circuit controls the external power supply to charge the first battery and enables the external power supply to enter the DCDC power supply module to power the system; The second charge and discharge circuit controls the external power supply to charge the second battery, and controls the battery switch to be turned off through the comparator; After the first charge and discharge circuit determines that there is no input from the external power supply, the first battery is controlled to discharge to generate a first discharge power supply, so that the first discharge power supply enters the DCDC power supply module to power the system; After the second charge and discharge circuit determines that there is no input from the external power supply, the second battery is controlled to discharge to generate a second discharge power supply, and the battery switch is kept closed; When the comparator determines that the voltage value of the first discharge power supply is lower than the voltage value of the constant voltage power supply, the comparator controls the battery switch to open, so that the second discharge power supply enters the DCDC power supply module to power the system.

2. The multi-channel power input dual battery power supply system according to claim 1, characterized in that: The power switch controls the target power interface to be turned on and then controls the other power interfaces to be turned off.

3. The multi-channel power input dual battery power supply system according to claim 1, characterized in that: It also includes an RK3588 processor, and the RK3588 processor is connected to the power switch, the first battery and the second battery respectively.

4. The multi-channel power input dual battery power supply system according to claim 1, characterized in that: The first charge and discharge circuit and the second charge and discharge circuit include an anti-backflow circuit.

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