A power device with bidirectional charging function

Abstract

The utility model discloses a kind of electric power devices with bidirectional charging function, including GaN charger, pipe T1, CC / CV controller, electric capacity C1, first output, PD controller, pipe T2, magnetic core inductance, electric capacity C2 and second output;The input side of GaN charger is connected with alternating current power supply, and output side is connected with first output and second output respectively;Output side includes first end and second end, and CC / CV controller is connected in parallel between first output and the both ends of output side;PD controller is connected between pipe T1 and first output;First output connects battery pack load, and second output connects PD load.The utility model realizes the bidirectional multiplexing function to battery pack and PD load, and few using devices, equipment miniaturization, full seal are facilitated;Optimize the charging of battery pack, avoid failure, spontaneous combustion and other problems caused by overcharge;Bidirectional multiplexing function expands the application diversification of traditional charger.

Description

Technical Field

[0001] This utility model relates to the technical field of bidirectional charging power devices, specifically to a power device with bidirectional charging function. Background Technology

[0002] Electric vehicles such as electric motorcycles and electric bicycles have a wide range of applications. These electric vehicles often connect their built-in batteries to external loads through various conversion devices and interfaces to provide users with services such as mobile phone charging and power bank charging, in order to meet users' real-time needs.

[0003] Currently, to meet users' power needs when using electric vehicles, some researchers have conducted research on bidirectional charging devices. By combining various circuits, such as temperature detection circuits, transformer isolation circuits, digital signal controllers, rectifier circuits, power control circuits, and PFC control circuits, they have achieved the function of simultaneously powering external digital devices while using an electric vehicle. However, these current measures often have the following problems: 1) When the overall circuit is too simple, it cannot achieve bidirectional multiplexing or poses significant safety hazards; when the circuit is too complex, the device is too large and too expensive, making it unsuitable for most users of electric vehicles. 2) Service life is hard to guarantee. Traditional equipment is inefficient and requires fans for heat dissipation. It is difficult to achieve fully enclosed operation, which makes it easy to be damaged in harsh environments. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a power device with bidirectional charging functionality. By combining a GaN charger, a CC / CV controller, and a PD controller, it achieves bidirectional multiplexing of the battery pack and PD load. This bidirectional multiplexing function expands the application versatility of traditional chargers, and uses fewer components, facilitating miniaturization and fully enclosed design for user convenience. It also optimizes battery pack charging, preventing issues such as failure and spontaneous combustion caused by overcharging. This power device is specifically designed for electric motorcycles and electric bicycles, enabling bidirectional power supply and charging of the battery pack and PD digital devices, solving the problems of limited functionality, large size, and insufficient safety in traditional devices.

[0005] The specific technical solution is as follows: A power device with bidirectional charging function includes a GaN charger, a transistor T1, a CC / CV controller, a capacitor C1, a first output port, a PD controller, a transistor T2, a magnetic core inductor, a capacitor C2, and a second output port. The input side of the GaN charger is connected to an AC power supply, and the output side of the GaN charger is connected to the first output port and the second output port respectively. The output side includes a first terminal and a second terminal. The first terminal is connected to the first output port through the transistor T1, and the second terminal is connected to the second output port. The CC / CV controller and the capacitor C1 are connected in parallel between the first output port and the two ends of the output side respectively. The PD controller is connected in parallel between the transistor T1 and the first output port, and the PD controller is connected to the second output port through the magnetic core inductor. The capacitor C2 is connected in parallel across the two ends of the second output port. The positive output terminal of the transistor T2 is connected between the PD controller and the magnetic core inductor, and the positive input terminal of the transistor T2 is connected between the second output port and the second terminal. The first output port is used to connect a battery pack load, and the second output port is used to connect a PD load.

[0006] Preferably, the GaN charger includes a GaN MOSFET, an AC / CDC controller, a signal isolator, and a transformer. The transformer includes winding A, an iron core, and winding B. Winding A serves as the first side, and winding B serves as the second side. The GaN MOSFET is connected to winding A and the AC / CDC controller, respectively, and the signal isolator is connected to the AC / CDC controller and the CC / CV controller, respectively.

[0007] Preferably, the second output port adopts a Type-C interface for connecting an external PD load.

[0008] Preferably, the GaN MOS transistor is a third-generation semiconductor GaN MOS transistor.

[0009] Preferably, it further includes a sampling circuit, which includes resistors R1, R2 and R3; resistors R1 and R2 are connected in series to form a series voltage divider circuit, the series voltage divider circuit is connected in parallel across the two ends of the first output port, and the CC / CV controller is connected between resistors R1 and R2; the two lines between the first output port and the two ends of the output side are respectively referred to as line one and line two, line one includes tube T1, and line two includes resistor R3.

[0010] Preferably, both transistors T1 and T2 are Schottky diodes.

[0011] The advantages of this utility model compared with the prior art are: This invention utilizes a combination of a GaN charger, a CC / CV controller, and a PD controller to achieve bidirectional multiplexing of the battery pack and PD load. It uses fewer components, making it easy to miniaturize and fully enclose the device, thus facilitating user operation. It also optimizes battery pack charging, avoiding problems such as failure and spontaneous combustion caused by overcharging. The bidirectional multiplexing function expands the application versatility of traditional chargers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a power device with bidirectional charging function. Figure 2 This is a schematic diagram of the battery pack in a power device with bidirectional charging function. Figure 3 This is a schematic diagram of the sampling circuit in a power device with bidirectional charging function. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0014] like Figure 1 The diagram shows a schematic of a power device with bidirectional charging capability. The circuit includes a GaN charger, transistor T1, a CC / CV controller, capacitor C1, a first output port, a PD controller, transistor T2, a magnetic core inductor, capacitor C2, and a second output port. The GaN charger, or gallium nitride charger, is responsible for transformer isolation. Its input side is connected to a 220V AC power supply (mains power). The output side of the GaN charger is connected to both the first and second output ports. The first output port is used to connect to an external battery pack load, and the second output port is used to connect to an external PD load (digital device), enabling bidirectional multiplexing of the battery pack load and the PD load.

[0015] The output side of the GaN charger includes a first terminal and a second terminal. The first terminal is connected to the first output port via a tube T1. When tube T1 is turned on, it charges the battery pack load connected to the first output port. The second terminal is connected to the first output port to form a circuit. A CC / CV controller and a capacitor C1 are connected in parallel between the first output port and the two terminals of the GaN charger output side. The capacitor C1 is used for filtering and energy storage. The CC / CV controller is used to control whether the charging of the battery pack load connected to the first output port is constant voltage or constant current. The specific control process of the CC / CV controller is publicly available and will not be described in detail here.

[0016] The PD controller is connected in parallel between transistor T1 and the first output port. The PD controller is connected to the second output port via a core inductor, and the second output port is connected to the second terminal to form a loop. The core inductor acts as an energy storage and conversion element, thereby improving the stability of the PD load output connected to the second output port. Capacitor C2 is connected in parallel across the second output port as an output filter capacitor, making the voltage output of the corresponding PD load smoother. The positive output terminal of transistor T2 is connected between the PD controller and the core inductor, and the positive input terminal of transistor T2 is connected between the second output port and the second terminal. Transistor T2 is used for switching control of the second output port. The PD controller can be a TPS6598x series or STUSB4500, etc.; the second output port uses a Type-C interface for connecting an external PD load.

[0017] The GaN charger includes a GaN MOSFET, an AC / CDC controller, a signal isolator, and a transformer. The transformer includes winding A, an iron core, and winding B. Winding A serves as the first side, and winding B serves as the second side. The GaN MOSFET is connected to winding A and the AC / CDC controller, respectively, and the signal isolator is connected to the AC / CDC controller and the CC / CV controller, respectively.

[0018] The GaN MOSFET uses a third-generation semiconductor GaN MOSFET, which effectively improves system efficiency and reduces size compared to traditional power supplies.

[0019] like Figure 3 The diagram shows a schematic of a sampling circuit in a power device with bidirectional charging capability. This power device also includes a sampling circuit comprising resistors R1, R2, and R3. Resistors R1 and R2 are connected in series to form a series voltage divider circuit, which is then connected in parallel across the first output port. A CC / CV controller is connected between resistors R1 and R2. The two lines between the first output port and the two ends of the output side are designated as Line 1 and Line 2, respectively. Line 1 includes transistor T1, and Line 2 includes resistor R3. The CC / CV controller samples the voltage output from the first terminal through the voltage divider via R1 and R2, and samples the current signal output from the first terminal through R3. This allows for real-time control of the ACDC power supply output, adjusting the charging process according to the charging status of the battery pack load to ensure reliability during charging, prevent overcharging, overcurrent, and other abnormal charging conditions, and guarantee the safety of the battery pack load.

[0020] A GaN charger includes a GaN MOSFET and a transformer. The transformer consists of winding A, an iron core, and winding B. Winding A serves as the first side, and winding B serves as the second side. The GaN MOSFET is connected to winding A. The high-frequency characteristics of the GaN MOSFET and the isolation transformation of the transformer enable efficient and high-density power conversion.

[0021] like Figure 2 The diagram shown is a schematic diagram of the bidirectional function in a power device with bidirectional charging capability. Figure 2 As shown, the PD load can use a Type-C interface for connecting external digital devices. The Type-C interface has a wide range of applications. The second output port is the PD output port, which has both AC and DC input modes. The AC input source is from mains power, i.e., a normal 220V AC mains power supply; the DC input source is powered by the battery pack load connected to the first output port. (In this application...) Figure 2 This is to illustrate the working principle of each part when the device is fixed, rather than specifying the order of operation.

[0022] A power device with bidirectional charging capability is described. In practical use, the AC / DC controller can use the THX552A chip, the PD controller can use the THX5101C chip supporting both QC and PD protocols, transistor T1 uses the THX204HSD Schottky diode, transistor T2 uses the THX101HSD Schottky diode, and the CC / CV controller uses the THX5201C lithium battery charging management chip (all examples here are well-known components, and the actual connection methods of each interface are fixed and known, so they are not elaborated here; the specific models are given to further demonstrate the feasibility of this solution. Capacitors and resistors are conventional components and can be selected according to the actual scenario). After being connected to 220VAC AC mains power, it enters battery charging mode. The AC power is converted to DC by the GaN charger. The GaN charger can simultaneously power digital devices with battery pack loads and PD loads, or it can power one of them independently. The dual outputs are independently controllable, enabling flexible power distribution. When the AC mains input is disconnected, the battery pack load can also be reverse-powered to supply power to digital devices with PD loads through the GaN charger, expanding the application scenarios of the two-wheeled vehicle charger; the CC / CV controller monitors through the sampling circuit, and performs constant current charging when the voltage is low and switches to constant voltage float charging when the voltage is high, avoiding the risk of overcharging and improving safety.

[0023] In summary, this application achieves bidirectional multiplexing of the battery pack and PD load by combining a GaN charger, a CC / CV controller, and a PD controller. It uses fewer components, which facilitates device miniaturization and full enclosure, making it convenient for users. At the same time, it optimizes battery pack charging, avoiding problems such as failure and spontaneous combustion caused by overcharging, demonstrating significant progress.

[0024] The above embodiments are only for illustrating the technical concept of this utility model and should not be used to limit the protection scope of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the protection scope of this utility model.

Claims

1. A power device with bidirectional charging function, characterized in that, It includes a GaN charger, transistor T1, CC / CV controller, capacitor C1, first output port, PD controller, transistor T2, magnetic core inductor, capacitor C2, and second output port; The GaN charger's input side is connected to AC power, and its output side is connected to a first output port and a second output port. The output side includes a first terminal and a second terminal. The first terminal is connected to the first output port via tube T1, and the second terminal is connected to the second output port. A CC / CV controller and a capacitor C1 are connected in parallel between the first output port and the two ends of the output side. A PD controller is connected in parallel between tube T1 and the first output port, and the PD controller is connected to the second output port via a magnetic core inductor. A capacitor C2 is connected in parallel across the two ends of the second output port. The positive output terminal of tube T2 is connected between the PD controller and the magnetic core inductor, and the positive input terminal of tube T2 is connected between the second output port and the second terminal. The first output port is used to connect the battery pack load, and the second output port is used to connect the PD load.

2. The power device with bidirectional charging function according to claim 1, characterized in that, The GaN charger includes a GaN MOSFET, an AC / CDC controller, a signal isolator, and a transformer. The transformer includes winding A, an iron core, and winding B. Winding A serves as the first side, and winding B serves as the second side. The GaN MOSFET is connected to winding A and the AC / CDC controller, respectively, and the signal isolator is connected to the AC / CDC controller and the CC / CV controller, respectively.

3. A power device with bidirectional charging function according to claim 1, characterized in that, The second output port uses a Type-C interface for connecting an external PD load.

4. A power device with bidirectional charging function according to claim 1, characterized in that, The GaN MOS transistor uses the third-generation semiconductor GaN MOS transistor.

5. A power device with bidirectional charging function according to claim 1, characterized in that, It also includes a sampling circuit, which includes resistors R1, R2 and R3; resistors R1 and R2 are connected in series to form a series voltage divider circuit, which is connected in parallel across the first output port, and the CC / CV controller is connected between resistors R1 and R2; the two lines between the first output port and the two ends of the output side are respectively denoted as line one and line two, line one includes tube T1, and line two includes resistor R3.

6. A power device with bidirectional charging function according to claim 1, characterized in that, Both transistors T1 and T2 are Schottky diodes.

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