Mobile power supply circuit supporting solar charging
By introducing solar charging functionality into the power bank circuit, the problem of power banks running out of power outdoors has been solved, enabling self-charging and expanding the application scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-03-24
AI Technical Summary
Existing portable power banks cannot recharge when their power is depleted in outdoor environments, which limits their usage scenarios.
Design a mobile power bank circuit that supports solar charging, including a battery module, a charger interface, a solar interface, a DC-DC module, and a management module. This enables the solar panel to charge the battery module and performs voltage conversion with external devices through the DC-DC module.
It enables the power bank to self-charge via solar panels in outdoor environments, expanding its application scenarios and meeting the needs of long-term outdoor use.
Smart Images
Figure CN224037108U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the circuit structure of a mobile power supply. Background Technology
[0002] A power bank, also known as a portable charger, is a portable energy storage device. Inside a power bank are battery cells that store electrical energy. These cells are connected to a compatible power management system (BMS) circuit board, which controls the charging and discharging of the battery cells. The battery cells and their BMS circuit board together form a battery cell module.
[0003] Power banks have a discharge interface, usually a USB-A or Type-C interface, which can be connected to mobile phones and other electronic devices to power them.
[0004] The power bank has a charging port, allowing it to be recharged by a charger when its power is depleted. However, this design forces the power bank to rely on an AC outlet. If the user is outdoors for an extended period, the power bank cannot be recharged when its power is exhausted, limiting its usability. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a mobile power supply circuit that can be connected to a solar panel to charge the mobile power supply.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A mobile power bank circuit supporting solar charging includes a battery cell module for storing electrical energy. The circuit is characterized by further including a charger interface and a first DC-DC module, wherein the charger interface, the first DC-DC module, and the battery cell module are sequentially connected. The charger interface is used to connect to an external charger, and the first DC-DC module performs a handshake with the charger's charging protocol, receives DC power output from the charger, converts it to an appropriate voltage, and supplies it to the battery cell module for charging.
[0008] It also includes a solar interface and a second DC-DC module. The solar interface, the second DC-DC module, and the battery cell module are connected in sequence. The solar interface is used to connect to an external solar panel, and the second DC-DC module receives the DC power output from the solar panel and converts it into an adaptive voltage to supply to the battery cell module to charge the battery cell module.
[0009] It also includes a third interface and a third DC-DC module. The third interface, the third DC-DC module, and the battery module are connected in sequence for connecting the third charging port to external devices. The third DC-DC module also hands over the charging protocol with the external devices. The third DC-DC module receives the electrical energy output by the battery module, converts it into an adaptive voltage, and supplies it to the external devices to power them.
[0010] It also includes a management module, which is connected to the first DC-DC module, the second DC-DC module and the third DC-DC module respectively, for controlling the first DC-DC module, the second DC-DC module and the third DC-DC module and communicating with them; the management module is also connected to the battery cell module to obtain power.
[0011] Furthermore, the charger interface is also used to connect to external devices, and the first DC-DC module hands-on with the external device charging protocol. The first DC-DC module receives the electrical energy output by the battery module, converts it into an adaptive voltage, and delivers it to the external device to power it.
[0012] Furthermore, the solar energy interface is an XT30, XT60, or XT90 interface.
[0013] Furthermore, it also includes a fourth interface, a fifth interface, and a fourth DC-DC module. The fourth interface and the fifth interface are respectively connected to the fourth DC-DC module, which is connected to the battery cell module. The fourth interface and the fifth interface are used to connect to external devices, and the fourth DC-DC module can handshake with the external device using the charging protocol. The fourth DC-DC module receives the electrical energy output by the battery cell module, converts it into an adaptive voltage, and delivers it to the external device to power it.
[0014] The beneficial effects of this utility model are as follows: In addition to a conventional charger interface and external power supply interface, the mobile power supply circuit of this solution also has a solar interface and a corresponding DC-DC module, which can connect to an external solar panel. This allows the output DC power from the solar panel to be converted and used to charge the battery module, facilitating long-term outdoor use of the mobile power supply. Attached Figure Description
[0015] Figure 1 This is a functional module schematic diagram of one embodiment of the circuit of this utility model. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, which typically include:
[0017] A mobile power bank circuit supporting solar charging includes a battery cell module for storing electrical energy, a charger interface, and a first DC-DC module. The charger interface, the first DC-DC module, and the battery cell module are connected in sequence. The charger interface is used to connect to an external charger. The first DC-DC module hands-on with the charger's charging protocol and receives DC power output from the charger, converts it into an adaptive voltage, and supplies it to the battery cell module to charge the battery cell module.
[0018] It also includes a solar interface and a second DC-DC module. The solar interface, the second DC-DC module, and the battery cell module are connected in sequence. The solar interface is used to connect to an external solar panel, and the second DC-DC module receives the DC power output from the solar panel and converts it into an adaptive voltage to supply to the battery cell module to charge the battery cell module.
[0019] It also includes a third interface and a third DC-DC module. The third interface, the third DC-DC module, and the battery module are connected in sequence for connecting the third charging port to external devices. The third DC-DC module also hands over the charging protocol with the external devices. The third DC-DC module receives the electrical energy output by the battery module, converts it into an adaptive voltage, and supplies it to the external devices to power them.
[0020] It also includes a management module, which is connected to the first DC-DC module, the second DC-DC module and the third DC-DC module respectively, for controlling the first DC-DC module, the second DC-DC module and the third DC-DC module and communicating with them; the management module is also connected to the battery cell module to obtain power.
[0021] The mobile power supply circuit of this solution is the same as that of the prior art, with a battery cell module for storing electrical energy. The battery cell module includes a rechargeable battery and an adapted power management system circuit board (BMS).
[0022] It also has a charger interface for connecting a charger, such as an existing smartphone charger.
[0023] When the charger is connected, the first DC-DC module can handshake with the phone charger's charging protocol, enabling the phone to output a compatible charging voltage, such as 5V or 9V low-voltage DC. The first DC-DC module then performs DC-DC conversion and supplies the voltage to the battery cell module to charge it. The voltage output by the first DC-DC module is determined by the charging voltage of the battery cell module, which is the same as the charging principle of existing power banks.
[0024] More preferably, the charger interface can serve as both a charging and discharging interface. For example, the charger interface can also be used to connect to external devices, and the first DC-DC module can handshake with the external device using a charging protocol. The first DC-DC module receives the electrical energy output by the battery module, converts it into an adaptive voltage, and supplies it to the external device to power it.
[0025] In this preferred embodiment, the first DC-DC module is a bidirectional DC-DC converter. When the charger interface is connected to a charger, it can charge the power bank. When the charger interface is connected to a mobile phone or other electrical device, the power output from the power bank is converted to a suitable voltage by the first DC-DC module to charge the mobile phone. The first DC-DC module can refer to existing bidirectional DC-DC conversion circuits and can be implemented using chip solutions such as the IP2366 from Injoinic Semiconductor.
[0026] like Figure 1 As shown, the circuit of this solution also includes a solar interface for connecting an external solar panel. The solar panel is a modular finished product that can absorb sunlight and convert it into DC power output.
[0027] When the solar panel is connected to the solar interface, the DC power output from the solar panel is converted into a suitable voltage by the second DC-DC module and supplied to the battery cell module to charge the battery cell module. Typical solar interfaces are XT30, XT60, or XT90 interfaces, which are convenient for transmitting large currents of 10-50A.
[0028] The third charging port is used to connect external devices, such as mobile phones. The third charging port is the interface for the power bank to supply power to the outside world. When the mobile phone is connected to the third charging port, the third DC-DC module hands over the charging protocol with the external device. The third DC-DC module receives the electrical energy output by the battery module, converts it into an adaptive voltage, and delivers it to the external device to charge it. This is the same as the external power supply principle of existing power banks. For example, it can be implemented using chip solutions such as the SW3526 from Zhuhai Zhirong Company.
[0029] The management module typically uses a microcontroller circuit to control the first DC-DC module, the second DC-DC module, and the third DC-DC module, and to communicate with them.
[0030] For example, when a charger is connected to the charger interface, the management module detects a preset voltage signal from the input terminal of the first DC-DC module. The management module recognizes the charger connection and sends an enable signal to the first DC-DC module. The first DC-DC module then starts operating, establishes a handshake with the charger protocol, obtains the charging voltage, and after DC-DC conversion, supplies it to the battery cell module for charging. Alternatively, if the management module detects a preset voltage signal from the input terminal of the first DC-DC module and recognizes the connection of a power device, it sends an enable signal to the first DC-DC module. The first DC-DC module then starts operating, establishes a handshake with the power device protocol, receives the output power from the battery cell module, converts the voltage, and supplies it to the power device.
[0031] For example, if the management module detects a signal within a preset voltage range from the input terminal of the second DC-DC module and recognizes that a solar panel is connected, it will send an enable signal to the second DC-DC module. The second DC-DC module will then start operating, receive the DC power output from the solar panel, and after DC transformation, supply it to the battery cell module for charging.
[0032] The third DC-DC module is used to supply power to the external device from the power bank. The principle is the same as when the first DC-DC module detects the access of the device. The third DC-DC module receives the output power from the battery module, converts the voltage, and then supplies it to the device at the third charging port.
[0033] The management module connects to the battery module to obtain the power required for its operation. It can also connect to the battery module's BMS (Battery Management System) to acquire parameters such as voltage and temperature, thereby controlling the BMS, for example, by cutting off the charging and discharging path of the battery module. The management module can also connect indicator lights to display the power bank's status and a button module for easy control of functions such as enabling / disabling the power bank.
[0034] To enable the power bank to charge more connected devices simultaneously, the circuit of this solution can be equipped with more interfaces and DC-DC modules. For example, it can also include a fourth interface, a fifth interface, and a fourth DC-DC module. The fourth and fifth interfaces are respectively connected to the fourth DC-DC module, which is connected to the battery cell module. The fourth and fifth interfaces are used to connect to external devices, and the fourth DC-DC module can handshake with the charging protocol of the external device. The fourth DC-DC module receives the electrical energy output by the battery cell module, converts it into an adaptive voltage, and delivers it to the external device to power it.
[0035] In this preferred embodiment, the fourth and fifth interfaces are respectively connected to the fourth DC-DC module. When a device is connected to either the fourth or fifth interface, the fourth DC-DC module can handshake with the external device's charging protocol, and then convert the battery module's output voltage into a compatible voltage to supply the external device. When external devices are connected to both the fourth and fifth interfaces simultaneously, the DC-DC module converts the battery module's output voltage into a 5-volt voltage for slow charging of the external device, for example, a 5V 1A charging current. The fourth DC-DC module can be implemented using chips such as the SW3517S from Zhuhai Zhirong Company.
Claims
1. A mobile power bank circuit supporting solar charging, comprising a battery cell module for storing electrical energy, characterized in that, It also includes a charger interface and a first DC-DC module. The charger interface, the first DC-DC module, and the battery cell module are connected in sequence. The charger interface is used to connect to an external charger. The first DC-DC module hands with the charger charging protocol and receives the DC power output from the charger, converts it into an adaptive voltage and supplies it to the battery cell module to charge the battery cell module. It also includes a solar interface and a second DC-DC module. The solar interface, the second DC-DC module, and the battery cell module are connected in sequence. The solar interface is used to connect to an external solar panel, and the second DC-DC module receives the DC power output from the solar panel and converts it into an adaptive voltage to supply to the battery cell module to charge the battery cell module. It also includes a third charging port and a third DC-DC module. The third charging port, the third DC-DC module, and the battery cell module are connected in sequence. The third charging port is used to connect to external devices, and the third DC-DC module hands over the charging protocol with the external devices. The third DC-DC module receives the electrical energy output by the battery cell module, converts it into an adaptive voltage, and supplies it to the external devices to power them. It also includes a management module, which is connected to the first DC-DC module, the second DC-DC module, and the third DC-DC module respectively, for controlling the first DC-DC module, the second DC-DC module, and the third DC-DC module and for communicating with them; the management module is also connected to the battery cell module to obtain power. The charger interface is also used to connect to external devices, and the first DC-DC module hands-on with the external device charging protocol. The first DC-DC module receives the electrical energy output by the battery module, converts it into an adaptive voltage, and delivers it to the external device to power it.
2. The mobile power supply circuit supporting solar charging as described in claim 1, characterized in that, The solar interface is an XT30, XT60, or XT90 interface.
3. The mobile power supply circuit supporting solar charging as described in claim 1, characterized in that, It also includes a fourth interface, a fifth interface, and a fourth DC-DC module. The fourth interface and the fifth interface are respectively connected to the fourth DC-DC module, which is connected to the battery cell module. The fourth interface and the fifth interface are used to connect to external devices, and the fourth DC-DC module can handshake with the external device using the charging protocol. The fourth DC-DC module receives the electrical energy output by the battery cell module, converts it into an adaptive voltage, and delivers it to the external device to power it.