Two-way charging circuit and mobile power supply
Through the design of the dual-channel charging circuit, the charging power is dynamically adjusted using two temperature sensing modules and power management chips, which solves the problem of long charging time of existing mobile power supplies and achieves a more efficient charging effect.
Patent Information
- Application Number
- CN202422138029.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-02
AI Technical Summary
Existing mobile power supplies usually have only one charging port and one power management chip, resulting in low charging power, too long charging time, and poor user experience.
It adopts a dual-channel charging circuit, including two temperature sensing modules, two power management chips and two charging modules. The two-channel charging is coordinated through the main control chip, and the charging power is dynamically adjusted to achieve maximum power charging within the safe temperature range.
Improve charging efficiency, shorten user waiting time, and provide higher charging power.
Smart Images
Figure CN223066850U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mobile power charging, and particularly to a dual - path charging circuit and a mobile power supply. Background Art
[0002] With the wide application of electronic devices, mobile power supplies that can charge electronic devices anytime and anywhere are becoming more and more popular among people.
[0003] Existing mobile power supplies usually have only one charging port and are equipped with only one power management chip for charging. However, when charging the mobile power supply through only one charging port and one power management chip in a single - path charging mode, the charging power is usually low, which will cause the charging time of the mobile power supply to be too long and the user experience to be poor. Summary of the Utility Model
[0004] To solve the above problems, the utility model provides a dual - path charging circuit and a mobile power supply.
[0005] To achieve the above object, the technical solution of the utility model is as follows:
[0006] A dual - path charging circuit includes a first temperature sensing module, a first power management chip, a main control chip, a second power management chip, a second temperature sensing module, a first charging module and a second charging module. The first temperature sensing module is connected to the main control chip. The first power management chip is connected to the main control chip and the first charging module. The first charging module is connected to a first charging port and a battery. The second temperature sensing module is connected to the main control chip. The second power management chip is connected to the main control chip and the second charging module. The second charging module is connected to a second charging port and a battery.
[0007] In a specific embodiment, the above - mentioned first temperature sensing module and the second temperature sensing module are implemented by using thermistors.
[0008] In a specific embodiment, the above - mentioned first temperature sensing module and the second temperature sensing module include a first resistor, a second resistor and a thermistor. The first end of the first resistor is connected to a first power supply. The second end of the first resistor is connected to the first end of the second resistor. The second end of the second resistor is grounded. The first end of the thermistor is connected to the first end of the second resistor. The second end of the thermistor is connected to the second end of the second resistor. The first end of the thermistor outputs a first voltage to the main control chip.
[0009] In a specific embodiment, the above-mentioned first charging module and the above-mentioned second charging module include a first switch, a second switch, a third switch, a fourth switch and a first inductor. The first end of the first switch is connected to the second voltage output from the first charging port or the second charging port. The second end of the first switch is connected to the first end of the second switch. The second end of the second switch is grounded. The first end of the third switch is the third voltage output from the first charging module or the second charging module to the battery. The second end of the third switch is connected to the first end of the fourth switch. The second end of the fourth switch is grounded. The first end of the second switch is connected to the first end of the first inductor. The second end of the first inductor is connected to the second end of the third switch.
[0010] In a specific embodiment, the models of the above-mentioned first power management chip and the above-mentioned second power management chip are SC8815A.
[0011] The present invention also provides a mobile power supply, which includes the above-mentioned dual-channel charging circuit, and further includes a first charging port, a second charging port and a battery. The input of the dual-channel charging circuit is connected to the first charging port and the second charging port, and the output of the dual-channel charging circuit is connected to the battery.
[0012] Further, the above-mentioned first charging port and the above-mentioned second charging port are respectively connected to an adapter.
[0013] Beneficial effects: For the dual-channel charging circuit and the mobile power supply of the present invention, through the method of dual-channel simultaneous charging, charging of the mobile power supply with a higher charging power is realized, the charging efficiency is improved, and the waiting time of the user is greatly shortened.
[0014] To make the above features and advantages of the present invention more obvious and understandable, specific embodiments are hereinafter given and detailed descriptions are made in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic structural diagram of a dual-channel charging circuit and a mobile power supply of the present invention.
[0016] Figure 2 It is a schematic circuit diagram of a specific embodiment of the first temperature sensing module and the second temperature sensing module.
[0017] Figure 3 It is a schematic circuit diagram of a specific embodiment of the first charging module. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] For the purpose of making the objectives and technical solutions of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present utility model with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0019] Figure 1 It is a schematic structural diagram of a dual-channel charging circuit and a mobile power supply of the present utility model. As Figure 1 shown, a mobile power supply of the present utility model includes a dual-channel charging circuit 1, a first charging port 2, a second charging port 3 and a battery 4. The input of the dual-channel charging circuit 1 is connected to the first charging port 2 and the second charging port 3, and the output of the dual-channel charging circuit 1 is connected to the battery 4.
[0020] More specifically, the dual-channel charging circuit 1 receives two charging currents provided by the first charging port 2 and the second charging port 3, and outputs two currents to charge the battery 4.
[0021] Further, the dual-channel charging circuit 1 includes a first temperature sensing module 11, a first power management chip 12, a main control chip 13, a second power management chip 14, a second temperature sensing module 15, a first charging module 16 and a second charging module 17. The first temperature sensing module 11 is connected to the main control chip 13, the first power management chip 12 is connected to the main control chip 13 and the first charging module 16, and the first charging module 16 is connected to the first charging port 2 and the battery 4; the second temperature sensing module 15 is connected to the main control chip 13, the second power management chip 14 is connected to the main control chip 13 and the second charging module 17, and the second charging module 17 is connected to the second charging port 3 and the battery 4.
[0022] More specifically, the first charging port 2 is connected to an adapter for providing a charging current to the first charging module 16. The first temperature sensing module 11 senses the current temperature and outputs temperature data to the main control chip 13. The main control chip 13 outputs a charging start signal and a stop signal to the first power management chip 12. The main control chip 13 also outputs a power adjustment signal to the first power management chip 12 according to the temperature data. The first power management chip 12 dynamically adjusts the driving signal of the switch in the first charging module 16 according to the power adjustment signal, thereby adjusting the charging power to ensure that the battery 4 is charged at the maximum power within a safe temperature range.
[0023] Similarly, the second charging port 3 is connected to an adapter for providing a charging current to the second charging module 17. The second temperature sensing module 15 senses the current temperature and outputs temperature data to the main control chip 13. The main control chip 13 outputs a charging start signal and a stop signal to the second power management chip 14. The main control chip 13 also outputs a power adjustment signal to the second power management chip 14 according to the temperature data. The second power management chip 14 dynamically adjusts the driving signal of the switch in the second charging module 17 according to the power adjustment signal, thereby adjusting the charging power to ensure that the battery 4 is charged at the maximum power within a safe temperature range.
[0024] Thus, it can be realized that the two power management chips can ensure two-way charging of the battery 4 at the maximum power within a safe temperature range under the temperature monitoring of the two temperature sensing modules, improving the charging speed and efficiency of the mobile power supply.
[0025] In a specific embodiment, the first temperature sensing module 11 and the second temperature sensing module 15 are implemented by using a thermistor (NTC).
[0026] More specifically, as Figure 2 shown, the first temperature sensing module 11 and the second temperature sensing module 15 include a resistor R1, a resistor R2, and a thermistor R T , the first end of the resistor R1 is connected to the power supply Vcc, the second end of the resistor R1 is connected to the first end of the resistor R2, the second end of the resistor R2 is grounded, the first end of the thermistor R T is connected to the first end of the resistor R2, the second end of the thermistor R T is connected to the second end of the resistor R2, and the first end of the thermistor R T outputs a voltage V T to the main control chip 13. The resistance value of the thermistor R T varies with temperature. The resistor R1 and the resistor R2 play a voltage dividing role, so that the voltage V T at the first end of the thermistor R T varies with temperature.
[0027] In a specific embodiment, the first charging module 16 adopts the topology as Figure 3 shown, including a switch Q1, a switch Q2, a switch Q3, a switch Q4, and an inductor L1. The first end of the switch Q1 is connected to the voltage V IN output from the first charging port 2 or the second charging port 3. The second end of the switch Q1 is connected to the first end of the switch Q2. The second end of the switch Q2 is grounded. The first end of the switch Q3 is the voltage V output from the first charging module 16 to the battery 4O The second terminal of the switch Q3 is connected to the first terminal of the switch Q4, the second terminal of the switch Q4 is grounded, the first terminal of the switch Q2 is connected to the first terminal of the inductor L1, and the second terminal of the inductor L1 is connected to the second terminal of the switch Q3.
[0028] More specifically, the first power management chip 12 outputs drive signals for the switches Q1, Q2, Q3, and Q4, dynamically adjusts the charging power of the first charging module 16, and ensures that the battery 4 is charged at the maximum power within a safe temperature range.
[0029] Optionally, the second charging module 17 can also adopt the topology as Figure 3 shown. At this time, the switch Q1 is connected to the voltage V output by the second charging port 3. IN The first terminal of the switch Q3 is the voltage V output from the second charging module 17 to the battery 4. O .
[0030] In a specific embodiment, the models of the first power management chip 12 and the second power management chip 14 are SC8815A.
[0031] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the appended patent application scope.
Claims
1. A dual-channel charging circuit, characterized in that, It includes a first temperature sensing module, a first power management chip, a main control chip, a second power management chip, a second temperature sensing module, a first charging module and a second charging module. The first temperature sensing module is connected to the main control chip. The first power management chip is connected to the main control chip and the first charging module. The first charging module is connected to a first charging port and a battery. The second temperature sensing module is connected to the main control chip. The second power management chip is connected to the main control chip and the second charging module. The second charging module is connected to a second charging port and the battery.
2. The dual-channel charging circuit according to claim 1, wherein The first temperature sensing module and the second temperature sensing module are implemented by using a thermistor.
3. The dual-channel charging circuit according to claim 2, wherein The first temperature sensing module and the second temperature sensing module include a first resistor, a second resistor and a thermistor. The first end of the first resistor is connected to a first power supply. The second end of the first resistor is connected to the first end of the second resistor. The second end of the second resistor is grounded. The first end of the thermistor is connected to the first end of the second resistor. The second end of the thermistor is connected to the second end of the second resistor. The first end of the thermistor outputs a first voltage to the main control chip.
4. The dual-channel charging circuit according to claim 1, wherein The first charging module and the second charging module include a first switch, a second switch, a third switch, a fourth switch and a first inductor. The first end of the first switch is connected to a second voltage output from the first charging port or the second charging port. The second end of the first switch is connected to the first end of the second switch. The second end of the second switch is grounded. The first end of the third switch is a third voltage output from the first charging module or the second charging module to the battery. The second end of the third switch is connected to the first end of the fourth switch. The second end of the fourth switch is grounded. The first end of the second switch is connected to the first end of the first inductor. The second end of the first inductor is connected to the second end of the third switch.
5. The dual-channel charging circuit according to claim 1, wherein The models of the first power management chip and the second power management chip are SC8815A.
6. A mobile power supply, characterized in that, It includes a dual-channel charging circuit according to any one of claims 1-5, and further includes a first charging port, a second charging port and a battery. The input of the dual-channel charging circuit is connected to the first charging port and the second charging port. The output of the dual-channel charging circuit is connected to the battery.
7. The mobile power supply according to claim 6, wherein The first charging port and the second charging port are respectively connected to an adapter.