A mobile power supply charging and multi-voltage conversion controller

Abstract

This invention discloses a mobile power supply charging and multi-voltage conversion controller, including a mobile vehicle battery and charging and discharging circuits disposed thereon. The charging circuit is composed of a power input terminal, a first converter module, a first DC solid-state relay contact, and a mobile vehicle battery charging terminal connected in series. The discharging circuit includes a mobile vehicle battery discharging terminal, a second converter module, a third converter module, and multiple output terminals. In addition, it also includes an inverter module, a light-controlled switch module, a time controller, and a remote control switch module. This invention solves the problems of low utilization rate of existing vehicle batteries, inconvenience in powering multi-voltage devices, and imperfect charging and discharging protection. It has advantages such as multi-voltage output, automatic charging and discharging protection, intelligent lighting control, and portable integration, and is suitable for outdoor mobile power supplies and on-site power supply applications.

Description

Technical Field

[0001] This invention relates to a conversion controller, specifically a mobile power bank charging and multi-voltage conversion controller, belonging to the field of mobile power bank management and power conversion technology. Background Technology

[0002] With the promotion of low-carbon and environmentally friendly concepts, the demand for mobile energy storage power sources is increasing, as vehicles such as lawnmowers and electric vehicles use onboard batteries. Onboard batteries have the potential to serve as mobile energy storage units due to their large capacity, relative portability, and high safety; however, they are often idle in practical applications, and their utilization rate needs to be improved.

[0003] In existing technologies, solutions for battery charging and discharging management mostly focus on optimizing single functions, such as power balancing between battery cells or temperature protection. However, there is still a lack of systematic solutions for transforming vehicle batteries into integrated, multi-purpose mobile power supply platforms. For example, CN101771280A discloses a battery charging controller and a battery balancing charging controller. This solution mainly addresses the imbalance problem between cells within the battery module, but its function is limited to cell balancing during the charging phase. It does not involve discharge management, multi-voltage conversion output, or intelligent load control, and cannot meet the demand for simultaneous power supply to devices with multiple voltage levels in outdoor scenarios. Another example is CN101714674A, which discloses a battery pack controller and its control method. This solution focuses on temperature monitoring and protection, improving the safety of the battery pack under extreme temperatures. However, its voltage conversion capability is limited, only providing the output of the battery pack's inherent voltage. It cannot adapt to electrical equipment with different rated voltages, nor does it have practical field functions such as automatic lighting control or remote control.

[0004] Furthermore, in scenarios such as field power operations, emergency rescue, and mobile inspection, the aforementioned existing technologies often require personnel to simultaneously power multiple devices, including drones, metal material testing instruments, mobile phones, and lighting fixtures. These devices have rated voltages ranging from 5V, 12V, to 220V AC. Traditional solutions necessitate carrying multiple independent power adapters or dedicated chargers, increasing both weight and operational complexity, and making it difficult to provide continuous power in environments without mains power. Additionally, existing simple vehicle-mounted battery chargers typically lack robust charge / discharge protection mechanisms, which can lead to overcharging or over-discharging of batteries with prolonged use, shortening battery life and even posing safety hazards. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of low utilization rate of existing vehicle batteries, inconvenience in powering multi-voltage devices, and imperfect charging and discharging protection, and to provide a mobile power charging and multi-voltage conversion controller with advantages such as multi-voltage output, automatic charging and discharging protection, intelligent lighting control and portability integration, which is suitable for outdoor mobile power supply and on-site operation power supply fields.

[0006] The present invention achieves the above objectives through the following technical solution: a mobile power bank charging and multi-voltage conversion controller, comprising a mobile power bank, wherein the mobile power bank is provided with a charging circuit and a discharging circuit;

[0007] The charging circuit includes a power input terminal, a first converter module, and a mobile vehicle battery charging terminal connected in series. The positive line of the power input terminal and the mobile vehicle battery charging terminal is connected in series with the closed contact 1J1 of the first DC solid-state relay A. The closed contact 2J1 of the second DC solid-state relay B is connected in series in the coil power supply circuit of the first DC solid-state relay A. The normally open contact CB1 of the charging protector module is connected in series in the coil circuit of the second DC solid-state relay B.

[0008] The discharge circuit includes a mobile vehicle battery discharge terminal, a second converter module, a third converter module, and multiple output terminals for connecting the load. The input terminal of the third converter module is connected in parallel with the input terminal of the second converter module to the mobile vehicle battery discharge terminal. The normally open contact FB1 of the discharge protector module is connected in series in the output circuit of the second converter module. The output terminal of the third converter module is used to provide auxiliary DC output voltage.

[0009] As a further embodiment of the present invention: multiple output terminals for connecting loads include lighting load terminals, an AC 220V power strip, and a 5V DC USB interface. The lighting load terminals are connected in series to the output terminal of the second converter module, and the AC 220V power strip and the 5V DC USB interface are connected in parallel to the input terminal of the second converter module.

[0010] As a further embodiment of the present invention: an inverter module is connected to the AC 220V power strip; the input terminal of the inverter module is connected in parallel with the input terminals of the second converter module and the third converter module to the discharge terminal of the mobile vehicle battery; the output terminal of the third converter module is connected to a 5V DC USB interface.

[0011] As a further embodiment of the present invention: a remote control switch module is connected to the line of the 5V DC USB interface; the power input terminal of the remote control switch module is connected in parallel with the 5V DC USB interface to the output terminal of the third converter module; the control contact YK1 of the remote control switch module is connected in series between the output terminal of the inverter module and the AC 220V power strip.

[0012] As a further embodiment of the present invention: the second converter module is connected to a light control switch module and a time controller; the open contact GK1 of the light control switch module is connected in series with the coil of the time controller and then connected to the output terminal of the second converter module; the delayed disconnect contact SK1 of the time controller is connected in series with the normally open contact FB1 of the discharge protector module and then connected to the lighting load terminal.

[0013] As a further embodiment of the present invention: the first converter module is a DC12V / DC54V DC voltage converter, the second converter module is a DC48V / DC12V DC voltage converter, the third converter module is a DC48V / DC5V DC voltage converter; and the inverter module is a DC48V / AC220V inverter.

[0014] As a further embodiment of the present invention: the power input terminal is connected to a 12V solar panel or a 12V car alternator.

[0015] As a further aspect of the present invention: the mobile power supply is a 48V vehicle-mounted energy storage battery, and the mobile vehicle-mounted battery charging terminal and the mobile vehicle-mounted battery discharging terminal are respectively used to connect to the charging interface and the discharging interface of the 48V vehicle-mounted energy storage battery.

[0016] As a further aspect of the present invention: the charging protector module is used to disconnect the normally open contact CB1 when the charging voltage reaches a set value.

[0017] As a further aspect of the present invention: the discharge protector module is used to disconnect the normally open contact FB1 when the discharge voltage is lower than a set value.

[0018] The beneficial effects of this invention are:

[0019] 1) This invention achieves comprehensive control over the charging and discharging process of vehicle batteries by defining and integrating the charging and discharging circuits separately in the same device: The charging circuit uses a first DC solid-state relay and a second DC solid-state relay, in conjunction with a charging protector module, to automatically cut off the charging circuit when the charging voltage reaches a preset overcharge threshold, effectively preventing battery overcharging, extending battery cycle life, and improving charging safety; The discharging circuit uses a second converter module and a third converter module connected in parallel to the discharge terminal of the mobile vehicle battery, which can simultaneously output DC power at different voltage levels and provide AC 220V output through an inverter module, so that the same controller can meet the differentiated power supply needs of various loads such as lighting fixtures, USB devices, drone chargers, metal detection instruments, and AC power equipment, reducing the number of power adapters required when working outdoors;

[0020] 2) The discharge protector module of this invention is connected in series at the output of the second converter module. It can automatically disconnect the load circuit when the battery voltage drops to the undervoltage threshold, preventing permanent damage caused by over-discharge of the battery. Together with the charging protector, it forms a two-way safety protection system. The combined application of the light control switch module and the time controller realizes automatic lighting and timed extinguishing of the lighting load at dusk, taking into account both the timeliness of nighttime work lighting and the conservation of battery power. The introduction of the remote control switch module enables wireless on / off control of the AC output, improving the safety and convenience of field operations. The power input terminal is compatible with 12V solar panels and 12V automotive alternators, realizing the goal of efficient reuse of vehicle batteries and integrated multi-functional mobile power supply. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of the present invention;

[0022] In the diagram: 1. DC solid-state relay A; 2. DC solid-state relay B; 3. First converter module; 4. First converter module; 5. Power input terminal; 6. Mobile vehicle battery charging terminal; 7. Lighting load wiring terminal; 8. Time controller; 9. Light control switch module; 10. Charging protector module; 11. Discharge protector module; 12. Third converter module; 13. Inverter module; 14. Remote control switch module; 15. AC 220V power strip; 16. Mobile vehicle battery discharge terminal; 17. 5V DC USB interface. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1, as Figure 1 As shown, this embodiment provides a mobile power bank charging and multi-voltage conversion controller, including a mobile power bank, which is provided with a charging circuit and a discharging circuit.

[0025] The charging circuit includes a power input terminal 5, a first converter module 3, and a mobile vehicle battery charging terminal 6 connected in series. The positive line of the power input terminal 5 and the mobile vehicle battery charging terminal 6 is connected in series with the closed contact 1J1 of the first DC solid-state relay A1. The closed contact 2J1 of the second DC solid-state relay B2 is connected in series in the coil power supply circuit of the first DC solid-state relay A1. The normally open contact CB1 of the charging protector module 10 is connected in series in the coil circuit of the second DC solid-state relay B2.

[0026] The discharge circuit includes a mobile vehicle battery discharge terminal 16, a second converter module 4, a third converter module 12, and multiple output terminals for connecting loads. The input terminal of the third converter module 12 is connected in parallel with the input terminal of the second converter module 4 to the mobile vehicle battery discharge terminal 16. The normally open contact FB1 of the discharge protector module 11 is connected in series in the output circuit of the second converter module 4. The output terminal of the third converter module 12 is used to provide auxiliary DC output voltage.

[0027] A complete mobile power supply charging and discharging management architecture is constructed by setting up charging and discharging circuits. The charging circuit is based on the first DC solid-state relay A1 and the second DC solid-state relay B2, and works with the charging protector module 10 to achieve automatic overcharge cut-off. This solves the problem that traditional simple charging circuits rely on manual monitoring or simple diode isolation and cannot accurately control the termination of charging, thus improving charging safety and battery cycle life. The discharging circuit is connected in parallel to the mobile vehicle battery discharge terminal 16 through the second converter module 4 and the third converter module 12, realizing the ability to output multiple voltages simultaneously from a single battery. It can provide differentiated power supply for various devices such as drones and metal material testing instruments on site without the need for additional configuration of multiple independent power modules, improving the utilization rate of vehicle batteries and the convenience of on-site operations. The discharge protector module 11 provides low voltage cut-off protection during load power supply, forming a complete front-end and back-end bidirectional safety protection system with the overcharge protection of the charging circuit, avoiding the risk of battery failure due to overcharging or over-discharging.

[0028] Example 2, in addition to all the technical features in Example 1, also includes: multiple output terminals for connecting loads, including a lighting load terminal 7, an AC 220V power strip 15, and a 5V DC USB interface 17. The lighting load terminal 7 is connected in series to the output terminal of the second converter module 4, and the AC 220V power strip 15 and the 5V DC USB interface 17 are connected in parallel to the input terminal of the second converter module 4. This allows for the simultaneous or time-sharing provision of three typical voltage levels of power output: the lighting load terminal 7 directly uses the 12V DC power output from the second converter module 4 to drive outdoor LED lights, meeting the lighting needs for nighttime operations; the AC 220V power strip 15 and the 5V DC USB interface 17 are connected in parallel to the input terminal, and obtain standard mains voltage and USB standard voltage respectively through subsequent inversion and step-down processing, thus directly powering various devices. The parallel connection method ensures that each output terminal works independently. When the 5V DC USB interface 17 is used to charge a mobile phone, it does not affect the AC 220V power strip 15 providing power to the testing instrument, achieving multi-purpose functionality.

[0029] The AC 220V power strip 15 is connected to an inverter module 13. The input terminal of the inverter module 13 is connected in parallel with the input terminals of the second converter module 4 and the third converter module 12 to the mobile vehicle battery discharge terminal 16. The output terminal of the third converter module 12 is connected to a 5V DC USB interface 17. Through the AC 220V output provided by the inverter module 13, the controller can directly drive various electrical devices with a rated voltage of AC 220V, solving the power supply problem of the above devices when there is a lack of mains power outdoors. At the same time, the 5V DC power output by the third converter module 12 is provided independently through the 5V DC USB interface 17, which is electrically isolated from and functionally complementary to the AC output of the inverter module 13, meeting the power needs of low-voltage portable electronic devices and high-voltage AC devices at the same time.

[0030] The 5V DC USB interface 17 is connected to a remote control switch module 14. The power input terminal of the remote control switch module 14 is connected in parallel with the 5V DC USB interface 17 to the output terminal of the third converter module 12. The control contact YK1 of the remote control switch module 14 is connected in series between the output terminal of the inverter module 13 and the AC 220V power strip 15 to realize remote wireless control of the AC 220V output. The 5V DC power output by the third converter module 12 continuously provides working power to the remote control switch module 14, keeping it in a standby receiving state. When the user sends a command through the remote control, the control contact YK1 of the remote control switch module 14 closes, connecting the circuit from the inverter module 13 to the AC 220V power strip 15, thereby realizing remote start or stop of AC electrical equipment.

[0031] The second converter module 4 is connected to a light control switch module 9 and a time controller 8. The open contact GK1 of the light control switch module 9 is connected in series with the coil of the time controller 8 and then connected to the output terminal of the second converter module 4. The delayed disconnect contact SK1 of the time controller 8 is connected in series with the normally open contact FB1 of the discharge protector module 11 and then connected to the lighting load terminal 7 to realize fully automated intelligent control of outdoor lighting. When the sunset light dims, the light control switch module 9 senses the change in ambient light intensity, and its open contact GK1 automatically closes, energizing the coil of the time controller 8 to start timing. At the same time, the delayed disconnect contact SK1 of the time controller 8 closes, connecting the circuit from the output terminal of the second converter module 4 to the lighting load terminal 7, and lighting the lighting fixtures. When the timer reaches the preset duration, the delayed disconnect contact SK1 opens, automatically turning off the lighting fixtures to avoid wasting electricity.

[0032] Example 3, in addition to all the technical features in Example 1, also includes: a first converter module 3, which is a DC12V / DC54V DC voltage converter; a second converter module 4, which is a DC48V / DC12V DC voltage converter; and a third converter module 12, which is a DC48V / DC5V DC voltage converter; an inverter module 13, which is a DC48V / AC220V inverter. On the input side, the first converter module 3 boosts the 12V DC output from the 12V solar panel or the car alternator to 54V, providing a suitable charging voltage margin for the 48V vehicle battery to ensure that the battery can be fully charged; on the discharge side, the second converter module 4 reduces the 48V battery voltage to 12V DC to meet the direct power supply requirements of 12V devices such as vehicle electrical appliances and LED lighting; the third converter module 12 reduces the 48V battery voltage to 5V standard USB voltage to power low-voltage electronic devices such as mobile phones and remote control modules; and the inverter module 13 inverts the 48V DC to 220V AC, compatible with standard AC electrical appliances.

[0033] The power input terminal 5 is connected to a 12V solar panel or a 12V car alternator to charge the vehicle battery using solar energy. It automatically stores energy during the day when there is sufficient sunlight, and the solar charging process is stable, which helps to extend the battery cycle life. When the power input terminal 5 is connected to the output of a 12V car alternator, the controller can use the vehicle's surplus power generation capacity to replenish the vehicle battery while the vehicle is in motion.

[0034] The power bank is a 48V vehicle-mounted energy storage battery. The charging terminal 6 and discharging terminal 16 of the vehicle-mounted battery are used to connect to the charging interface and discharging interface of the 48V vehicle-mounted energy storage battery, respectively.

[0035] The charging protector module 10 is used to disconnect the normally open contact CB1 when the charging voltage reaches a set value.

[0036] The discharge protector module 11 is used to disconnect the normally open contact FB1 when the discharge voltage is lower than the set value.

[0037] Working principle and process: During charging, the power input terminal 5 is connected to a 12V solar panel or a 12V car alternator to output power. After being boosted by the first converter module 3, the power is connected to the mobile vehicle battery charging terminal 6 through the closed contact 1J1 of the first DC solid-state relay A1 to charge the mobile power supply. Under normal charging conditions, the coil of the second DC solid-state relay B2 is energized through the normally open contact CB1 of the charging protector module 10, and its closed contact 2J1 remains open. The coil of the first DC solid-state relay A1 is not energized, and the closed contact 1J1 remains closed, thus conducting the charging circuit. When the charging voltage reaches the set value, the charging protector module 10 activates, causing the normally open contact CB1 to open. The coil of the second DC solid-state relay B2 is de-energized, causing its closed contact 2J1 to reopen. The coil of the first DC solid-state relay A1 is energized, causing its closed contact 1J1 to open, thus cutting off the charging circuit and achieving overcharge protection.

[0038] During discharge, the power from the mobile power supply is simultaneously input in parallel to the second converter module 4, the third converter module 12, and the inverter module 13 via the mobile vehicle battery discharge terminal 16. The second converter module 4 steps down the power and outputs it to the lighting load terminal 7 via the normally open contact FB1 of the discharge protector module 11 for use by the lighting load. The third converter module 12 steps down the power and outputs it to the 5V DC USB interface 17 for charging low-voltage devices.

[0039] When the discharge voltage is lower than the set value, the discharge protector module 11 activates, causing the normally open contact FB1 to open and disconnecting the lighting load terminal 7 circuit to achieve over-discharge protection. In the lighting control circuit, the open contact GK1 of the light control switch module 9 is connected in series with the coil of the time controller 8 and then connected to the output terminal of the second converter module 4. When the ambient light dims, the open contact GK1 of the light control switch module 9 closes, energizing the coil of the time controller 8. Its delayed disconnect contact SK1 closes, connecting the lighting load terminal 7 circuit to light up the lamp. After the preset time is reached, the delayed disconnect contact SK1 opens to turn off the lamp. In the remote control circuit, the power input terminal of the remote control switch module 14 is connected in parallel with the 5V DC USB interface 17 to the output terminal of the third converter module 12 to obtain working power. Its control contact YK1 is connected in series between the output terminal of the inverter module 13 and the AC 220V power strip 15. The remote start and stop control of the output power of the AC 220V power strip 15 is realized by controlling the on and off of the control contact YK1 through the remote control signal. The inverter module 13 inverts the DC power of the mobile power supply into AC power and outputs it to the AC 220V power strip 15 through the control contact YK1 for use by AC electrical equipment.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mobile power bank charging and multi-voltage conversion controller, comprising a mobile power bank, characterized in that: The power bank is equipped with a charging circuit and a discharging circuit. The charging circuit includes a power input terminal (5), a first converter module (3), and a mobile vehicle battery charging terminal (6) connected in series. The positive line of the power input terminal (5) and the mobile vehicle battery charging terminal (6) is connected in series with the closed contact 1J1 of the first DC solid-state relay A (1). The coil power supply circuit of the first DC solid-state relay A (1) is connected in series with the closed contact (2J1) of the second DC solid-state relay B (2). The coil circuit of the second DC solid-state relay B (2) is connected in series with the normally open contact CB1 of the charging protector module (10). The discharge circuit includes a mobile vehicle battery discharge terminal (16), a second converter module (4), a third converter module (12), and multiple output terminals for connecting loads; the input terminal of the third converter module (12) is connected in parallel with the input terminal of the second converter module (4) to the mobile vehicle battery discharge terminal (16), the normally open contact FB1 of the discharge protector module (11) is connected in series in the output circuit of the second converter module (4), and the output terminal of the third converter module (12) is used to provide auxiliary DC output voltage.

2. The mobile power bank charging and multi-voltage conversion controller according to claim 1, characterized in that: The multiple output terminals for connecting loads include a lighting load terminal (7), an AC 220V power strip (15), and a 5V DC USB interface (17). The lighting load terminal (7) is connected in series to the output terminal of the second converter module (4), and the AC 220V power strip (15) and the 5V DC USB interface (17) are connected in parallel to the input terminal of the second converter module (4).

3. A mobile power bank charging and multi-voltage conversion controller according to claim 2, characterized in that: The AC 220V power strip (15) is connected to an inverter module (13); the input terminal of the inverter module (13) is connected in parallel with the input terminal of the second converter module (4) and the input terminal of the third converter module (12) to the mobile vehicle battery discharge terminal (16); the output terminal of the third converter module (12) is connected to a 5V DC USB interface (17).

4. A mobile power bank charging and multi-voltage conversion controller according to claim 2, characterized in that: The 5V DC USB interface (17) is connected to a remote control switch module (14); the power input terminal of the remote control switch module (14) is connected in parallel with the 5V DC USB interface (17) to the output terminal of the third converter module (12); the control contact YK1 of the remote control switch module (14) is connected in series between the output terminal of the inverter module (13) and the AC 220V power strip (15).

5. A mobile power bank charging and multi-voltage conversion controller according to claim 2, characterized in that: The second converter module (4) is connected to a light control switch module (9) and a time controller (8); the open contact GK1 of the light control switch module (9) is connected in series with the coil of the time controller (8) and then connected to the output terminal of the second converter module (4); the delayed disconnect contact SK1 of the time controller (8) is connected in series with the normally open contact FB1 of the discharge protector module (11) and then connected to the lighting load terminal (7).

6. A mobile power bank charging and multi-voltage conversion controller according to claim 3, characterized in that: The first converter module (3) is a DC12V / DC54V DC voltage converter, the second converter module (4) is a DC48V / DC12V DC voltage converter, the third converter module (12) is a DC48V / DC5V DC voltage converter, and the inverter module (13) is a DC48V / AC220V inverter.

7. A mobile power bank charging and multi-voltage conversion controller according to claim 1, characterized in that: The power input terminal (5) is connected to a 12V solar panel or a 12V car generator.

8. A mobile power bank charging and multi-voltage conversion controller according to claim 1, characterized in that: The mobile power supply is a 48V vehicle-mounted energy storage battery. The mobile vehicle-mounted battery charging terminal (6) and the mobile vehicle-mounted battery discharging terminal (16) are respectively used to connect the charging interface and the discharging interface of the 48V vehicle-mounted energy storage battery.

9. A mobile power bank charging and multi-voltage conversion controller according to claim 1, characterized in that: The charging protector module (10) is used to disconnect the normally open contact CB1 when the charging voltage reaches a set value.

10. A mobile power bank charging and multi-voltage conversion controller according to claim 1, characterized in that: The discharge protector module (11) is used to disconnect the normally open contact FB1 when the discharge voltage is lower than the set value.

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