A power output control circuit and a portable energy storage device

Abstract

The utility model discloses a power output control circuit and portable energy storage equipment relates to power supply equipment technical field. Power output control circuit includes: main control unit, voltage conversion unit, power supply control unit, switch unit and output interface, the communication signal output end of power supply control unit is connected with the communication signal input end of energy storage unit, and the electric signal input end of power supply control unit is connected with the electric signal output end of energy storage unit, and the electric signal output end of power supply control unit and the input end of switch unit are connected, the first output end of switch unit is connected with the electric signal input end of voltage conversion unit, and the second output end and the electric signal output end of voltage conversion unit are all connected with output interface, and the voltage conversion control end, switch control end and power supply control communication end of main control unit are connected with the control end of voltage conversion unit, the control end of switch unit and the communication end of power supply control unit respectively. The utility model has promoted the flexibility of portable energy storage equipment electric energy output.

Description

Technical Field

[0001] This utility model relates to the field of power supply equipment technology, and in particular to a power output control circuit and a portable energy storage device. Background Technology

[0002] With the increasing popularity of portable electronic devices and the growing demand for outdoor activities, portable energy storage devices are gradually gaining widespread use as an efficient and portable power solution. Portable energy storage devices are typically equipped with Type-C interfaces and car charger output interfaces to meet the diverse charging needs of portable electronic devices.

[0003] Because the circuitry of car charger output interfaces is expensive and used infrequently, existing technologies typically use a simple adapter to connect the Type-C interface of portable energy storage devices. This adapter then induces the portable energy storage device to output specific voltage and current levels, such as 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, or 20V / 5A, to achieve car charging functionality. However, existing Type-C to car charger solutions use fixed voltage and current levels from portable energy storage devices, resulting in insufficient flexibility in power output and an inability to provide high currents, such as output power exceeding 5A, thus limiting the application range of portable energy storage devices. Utility Model Content

[0004] This invention provides a power output control circuit and a portable energy storage device. By dynamically adjusting the voltage and current levels and the power output path of the energy storage device, the flexibility of the power output of the portable energy storage device is improved.

[0005] The first aspect of this utility model provides a power output control circuit for controlling the power output path of an energy storage unit. The power output control circuit includes: a main control unit, a voltage conversion unit, a power supply control unit, a switching unit, and an output interface.

[0006] The communication signal output terminal of the power supply control unit is connected to the communication signal input terminal of the energy storage unit, the electrical signal input terminal of the power supply control unit is connected to the electrical signal output terminal of the energy storage unit, and the electrical signal output terminal of the power supply control unit is connected to the input terminal of the switching unit.

[0007] The first output terminal of the switching unit is connected to the electrical signal input terminal of the voltage conversion unit, and the second output terminal of the switching unit and the electrical signal output terminal of the voltage conversion unit are both connected to the output interface.

[0008] The voltage conversion control terminal of the main control unit is connected to the control terminal of the voltage conversion unit, the switch control terminal of the main control unit is connected to the control terminal of the switch unit, and the power supply control communication terminal of the main control unit is connected to the communication terminal of the power supply control unit.

[0009] Optionally, the power output control circuit may further include: an interaction unit;

[0010] The user operation data receiving end of the main control unit is connected to the user operation data sending end of the interaction unit.

[0011] Optionally, the interaction unit includes at least one of mechanical buttons or touch buttons.

[0012] Optionally, the power supply control unit includes a protocol chip circuit; the protocol chip circuit integrates a common interface;

[0013] The communication terminal of the protocol chip circuit is connected to the power supply control communication terminal of the main control unit; the common interface is connected to the communication signal input terminal of the energy storage unit.

[0014] Optionally, the voltage conversion unit includes a buck circuit.

[0015] Optionally, the power output control circuit may further include: a detection unit;

[0016] The detection terminal of the detection unit is connected to the electrical signal output terminal of the voltage conversion unit and the second output terminal of the switching unit, respectively, and the detection signal output terminal of the detection unit is connected to the detection communication terminal of the main control unit.

[0017] Optionally, the power output control circuit further includes: a display unit;

[0018] The display control terminal of the main control unit is connected to the control terminal of the display unit.

[0019] Optionally, the power supply output terminal of the power supply control unit is connected to the power supply input terminal of the main control unit and the power supply input terminal of the display unit, respectively.

[0020] Optionally, the power output control circuit may further include: a voltage regulator unit;

[0021] The electrical signal input terminal of the voltage regulator unit is connected to the power supply output terminal of the power supply control unit, and the electrical signal output terminal of the voltage regulator unit is connected to the power supply input terminal of the main control unit and the power supply input terminal of the display unit, respectively.

[0022] The second aspect of this utility model provides a portable energy storage device, including: an energy storage unit and a power output control circuit as described above.

[0023] The technical solution of this utility model, by setting a main control unit, an interaction unit, a voltage conversion unit, a power supply control unit, a switching unit, and an output interface in the power output control circuit, can provide the electrical signal output by the energy storage unit to the output interface through the power output control circuit, thereby meeting the different charging needs of vehicle-mounted equipment. By setting the power supply control communication terminal of the main control unit to the communication terminal of the power supply control unit, the power supply control unit can adjust the output electrical signal of the energy storage unit according to the communication signal output by the main control unit. This electrical signal can be transmitted sequentially through the electrical signal output terminal of the energy storage unit, the electrical signal input terminal of the power supply control unit, and the electrical signal output terminal of the power supply control unit to the input terminal of the switching unit. Meanwhile, by connecting the main control unit's switch control terminal to the switch unit's control terminal, and by connecting the main control unit's voltage conversion control terminal to the voltage conversion unit's control terminal, the switch unit can adjust its conduction state according to the control signal output by the main control unit. This allows the switch unit to convert the electrical signal provided by the energy storage unit via the voltage conversion unit before outputting it to the output interface when the first output terminal of the switch unit is on, based on the control signal output by the main control unit. This enables stable and high-current car charger output through the power output control circuit, improving the power supply performance of the portable energy storage device. Furthermore, when the second output terminal of the switch unit is on, the electrical signal provided by the energy storage unit, with multiple voltage and current levels, can be directly output to the output interface. This allows for dynamic adjustment of the voltage and current levels of the energy storage unit's output and the power output path, enhancing the flexibility of the portable energy storage device's power output.

[0024] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a power output control circuit provided in an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of another power output control circuit provided in this embodiment of the present invention;

[0028] Figure 3This is a schematic diagram of a step-down circuit provided in an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Figure 1 This is a schematic diagram of a power output control circuit provided in an embodiment of the present invention. The power output control circuit is used to control the power output path of the energy storage unit 01. Figure 1 As shown, the power output control circuit includes: a main control unit 1, a voltage conversion unit 2, a power supply control unit 3, a switch unit 4, and an output interface 02; the communication signal output terminal 31 of the power supply control unit 3 is connected to the communication signal input terminal 011 of the energy storage unit 01, the electrical signal input terminal 32 of the power supply control unit 3 is connected to the electrical signal output terminal 012 of the energy storage unit 01, and the electrical signal output terminal 33 of the power supply control unit 3 is connected to the input terminal 41 of the switch unit 4; the first output terminal 42 of the switch unit 4 is connected to the electrical signal input terminal 21 of the voltage conversion unit 2, and the second output terminal 43 of the switch unit 4 and the electrical signal output terminal 22 of the voltage conversion unit 2 are both connected to the output interface 02; the voltage conversion control terminal 11 of the main control unit 1 is connected to the control terminal 23 of the voltage conversion unit 2, the switch control terminal 12 of the main control unit 1 is connected to the control terminal 44 of the switch unit 4, and the power supply control communication terminal 13 of the main control unit 1 is connected to the communication terminal 34 of the power supply control unit 3.

[0032] Specifically, energy storage unit 01 can be understood as a portable energy storage unit, such as a power bank or outdoor power station. Energy storage unit 01 typically uses lithium battery technology to store electrical energy and can output electrical energy to the power output control circuit via electrical signal output terminal 012. It can further output electrical energy to output interface 02 via the power output control circuit. Energy storage unit 01 can output various voltage and current levels, such as 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, or 28V / 5A. Output interface 02 can be connected to the electrical signal input terminal of a device to power it with the electrical energy output from energy storage unit 01. For example, output interface 02 can be connected to a vehicle charger or vehicle charging port to provide a stable DC power supply to in-vehicle devices such as car refrigerators, microwave ovens, electric kettles, or televisions, thereby meeting the charging needs of these devices.

[0033] The main control unit 1 is used to control the conduction state of the switching unit 4, adjust the electrical signal output by the power supply control unit 3 to control the energy storage unit 01, and control the voltage conversion unit 2 to convert the electrical signal output by the energy storage unit 01. For example, the main control unit 1 may include a microcontroller unit (MCU). Specifically, the power supply control communication terminal 13 of the main control unit 1 is connected to the communication terminal 34 of the power supply control unit 3, so that the power supply control unit 3 can adjust the output voltage and current level of the energy storage unit 01 according to the communication signal output by the main control unit 1. The communication signal output terminal 31 of the power supply control unit 3 is connected to the communication signal input terminal 011 of the energy storage unit 01, so that the energy storage unit 01 can adjust its internal DC-DC converter according to the communication signal output by the power supply control unit 3, thereby outputting an electrical signal with a specified voltage and current level to the electrical signal input terminal 32 of the power supply control unit 3 through the electrical signal output terminal 012 of the energy storage unit 01. After receiving the electrical signal output by the energy storage unit 01, the power supply control unit 3 can further output the electrical signal provided by the energy storage unit 01 to the input terminal 41 of the switching unit 4 through the electrical signal output terminal 33 of the power supply control unit 3, so as to meet the power supply requirements of different vehicle loads.

[0034] Optional, Figure 2 This is a schematic diagram of another power output control circuit provided in an embodiment of the present invention, as shown below. Figure 2As shown, the power supply control unit 3 includes a protocol chip circuit 03; the protocol chip circuit 03 integrates a common interface 04; the communication terminal 031 of the protocol chip circuit 03 is connected to the power supply control communication terminal 13 of the main control unit 1; the common interface 04 is connected to the communication signal input terminal 011 of the energy storage unit 01. Specifically, the communication terminal 031 of the protocol chip circuit 03 is connected to the power supply control communication terminal 13 of the main control unit 1 so that the protocol chip circuit 03 can receive the power supply control communication signal output by the main control unit 1, that is, the output voltage and current of a specific level requested by the main control unit 1. At the same time, the common interface 04 is connected to the communication signal input terminal 011 of the energy storage unit 01 so that the protocol chip circuit 03 can communicate with the energy storage unit 01 through the common interface 04 to request the energy storage unit 01 to output a voltage and current of a specific level. For example, the common interface 04 may include a Type-C interface. After the protocol chip circuit 03 successfully communicates with the energy storage unit 01, the energy storage unit 01 will adjust its internal DC-DC converter to output an electrical signal with a specific voltage and current level requested by the main control unit 1 through the electrical signal output terminal 012 to the electrical signal input terminal 32 of the power supply control unit 3, and can further output it to the input terminal 41 of the switching unit 4 through the electrical signal output terminal 33 of the power supply control unit 3.

[0035] For example, the protocol chip circuit 03 communicates with the energy storage unit 01, enabling the energy storage unit 01 to output multiple voltage and current levels, such as 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, or 28V / 5A. It is understood that the voltage and current combinations for each level can be determined based on the USB Power Delivery (USB PD) protocol. 5V / 3A, 9V / 3A, 12V / 3A, and 15V / 3A are low-power levels in the USB PD standard, suitable for low-power automotive devices; 20V / 5A and 28V / 5A are high-power levels in the USB PD standard, suitable for high-power automotive devices. By controlling the energy storage unit 01 to output electrical signals with multiple voltage and current levels of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, or 28V / 5A, the flexibility of the portable energy storage device's power output is improved, and a foundation is laid for providing a 12V / 10A electrical signal to the vehicle-mounted equipment via the output interface 02.

[0036] The switch control terminal 12 of the main control unit 1 is connected to the control terminal 44 of the switch unit 4, so that the switch unit 4 can adjust its conduction state according to the control signal output by the main control unit 1, that is, adjust the first output terminal 42 or the second output terminal 43 of the switch unit 4 to be on. The first output terminal 42 of the switch unit 4 is connected to the electrical signal input terminal 21 of the voltage conversion unit 2. The second output terminal 43 of the switch unit 4 and the electrical signal output terminal 22 of the voltage conversion unit 2 are both connected to the electrical signal input terminal 021 of the output interface 02. Therefore, when the first output terminal 42 of the switch unit 4 is on, the electrical signal provided by the energy storage unit 01 can be converted by the voltage conversion unit 2 and then output to the output interface 02; when the second output terminal 43 of the switch unit 4 is on, the electrical signal provided by the energy storage unit 01 can be directly output to the output interface 02 through the second output terminal 43 of the switch unit 4, thereby realizing the dynamic adjustment of the power output path of the energy storage unit 01. For example, the switching unit 4 may include an electromagnetic switch, a relay switch, etc. The main control unit 1 can control the coil of the electromagnetic switch to be energized or de-energized through the switch control terminal 12 to adjust the first output terminal 42 of the switching unit 4 to be on or the second output terminal 43 to be on. Alternatively, the main control unit 1 can apply voltage to the relay switch through the switch control terminal 12 to control the contacts of the relay switch to contact the first output terminal 42 or the second output terminal 43 to adjust the first output terminal 42 of the switching unit 4 to be on or the second output terminal 43 to be on.

[0037] It is understandable that when the main control unit 1 controls the first output terminal 42 of the switching unit 4 to be turned on, the energy storage unit 01 can be in a stable voltage charging mode. For example, the power supply control unit 3 can adjust the voltage and current level of the electrical signal output by the energy storage unit 01 to 28V / 5A according to the control signal output by the main control unit 1. This electrical signal is input to the voltage conversion unit 2 via the first output terminal 42 of the switching unit 4. The voltage conversion unit 2 is specifically used to convert the electrical signal provided by the energy storage unit 01. For example, the voltage conversion unit 2 may include a MOSFET switch or a linear regulator, so as to convert the electrical signal provided by the energy storage unit 01 through pulse width modulation or directly step down the voltage of the electrical signal provided by the energy storage unit 01. The voltage conversion control terminal 11 of the main control unit 1 is connected to the control terminal 23 of the voltage conversion unit 2, so that the voltage conversion unit 2 can convert the 28V / 5A electrical signal output by the energy storage unit 01 into a 12V / 10A electrical signal according to the control signal output by the main control unit 1. This signal can then be output to the output interface 02 through the electrical signal output terminal 22 of the voltage conversion unit 2, thereby achieving a stable and high-current vehicle charging output through the power output control circuit. It can also be understood that when the second output terminal 43 of the control switch unit 4 is turned on by the main control unit 1, the energy storage unit 01 can be in an adjustable voltage charging mode. For example, the power supply control unit 3 can adjust the output of the energy storage unit 01 to have multiple voltage and current levels of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, or 28V / 5A according to the control signal output by the main control unit 1. This electrical signal is directly input to the output interface 02 through the second output terminal 43 of the control unit 4 to meet the charging needs of different vehicle loads.

[0038] By controlling the conduction state of the switch unit 4 through the main control unit 1, adjusting the electrical signal output by the energy storage unit 01 through the power supply control unit 3, and controlling the voltage conversion unit 2 to convert the electrical signal output by the energy storage unit 01, dynamic adjustment of the voltage and current levels and power output path of the energy storage unit 01 is achieved, thereby improving the flexibility of power output of the portable energy storage device. Simultaneously, by controlling the voltage conversion unit 2 to convert the electrical signal output by the energy storage unit 01, a stable and high-current car charger output can be achieved through the power output control circuit, improving the power supply performance of the portable energy storage device. Furthermore, by setting the power output control circuit to connect to both the energy storage unit 01 and the output interface 02, the electrical signal output by the energy storage unit 01 can be provided to the output interface 02 through the common interface 04 and the output interface 02. This reduces the redundancy of simultaneously setting up a Type-C interface and a car charger output interface in the energy storage unit 01, lowering the cost of the energy storage unit 01 and improving the utilization rate of the Type-C interface.

[0039] In this embodiment, by incorporating a main control unit, an interaction unit, a voltage conversion unit, a power supply control unit, a switching unit, and an output interface into the power output control circuit, the electrical signal output by the energy storage unit can be provided to the output interface, thereby meeting the different charging needs of the vehicle-mounted equipment. By connecting the power supply control communication terminal of the main control unit to the communication terminal of the power supply control unit, the power supply control unit can adjust the output electrical signal of the energy storage unit according to the communication signal output by the main control unit. This electrical signal can be transmitted sequentially through the electrical signal output terminal of the energy storage unit, the electrical signal input terminal of the power supply control unit, and the electrical signal output terminal of the power supply control unit to the input terminal of the switching unit. Meanwhile, by connecting the main control unit's switch control terminal to the switch unit's control terminal, and by connecting the main control unit's voltage conversion control terminal to the voltage conversion unit's control terminal, the switch unit can adjust its conduction state according to the control signal output by the main control unit. This allows the switch unit to convert the electrical signal provided by the energy storage unit via the voltage conversion unit before outputting it to the output interface when the first output terminal of the switch unit is on, based on the control signal output by the main control unit. This enables stable and high-current car charger output through the power output control circuit, improving the power supply performance of the portable energy storage device. Furthermore, when the second output terminal of the switch unit is on, the electrical signal provided by the energy storage unit, with multiple voltage and current levels, can be directly output to the output interface. This allows for dynamic adjustment of the voltage and current levels of the energy storage unit's output and the power output path, enhancing the flexibility of the portable energy storage device's power output.

[0040] Optional, continue to refer to Figure 2 The power output control circuit also includes an interaction unit 5; the user operation data receiving end 14 of the main control unit 1 is connected to the user operation data sending end 51 of the interaction unit 5.

[0041] Specifically, the user operation data receiving end 14 of the main control unit 1 is connected to the user operation data sending end 51 of the interaction unit 5, so that the interaction unit 5 can send the user's operation instructions to the main control unit 1 through the user operation data sending end 51. This allows the main control unit 1 to control the conduction state of the switch unit 4, adjust the power supply control unit 3 to control the electrical signal output of the energy storage unit 01, and control the voltage conversion unit 2 to convert the electrical signal output of the energy storage unit 01 according to the user's operation data. This allows the user to dynamically select different charging modes of the energy storage device 01 according to different charging needs of the vehicle load, thus improving the flexibility of the portable energy storage device's power output.

[0042] Optionally, the interaction unit 5 includes at least one of mechanical buttons or touch buttons. Specifically, the user can send operation data to the touch unit 1 through the operation buttons. The main control unit 1 can determine the user's button press time through its internal timer and output corresponding control signals to the control terminal 23 of the voltage conversion unit 2, the control terminal 44 of the switch unit 4, and the communication terminal 34 of the power supply control unit 3 according to the user's button press time. For example, when the timer inside the main control unit 1 detects a continuous level signal, that is, when the timer inside the main control unit 1 determines that the user's button press time is greater than 5000ms, it will trigger the conversion of the charging mode of the energy storage device 01 through the control signal output by the main control unit 1. For example, the voltage conversion unit 2, the power supply control unit 3, and the switch unit 4 will convert the charging mode of the energy storage device 01 from a stable voltage charging mode to an adjustable voltage charging mode according to the control signal output by the main control unit 1; when the charging mode of the energy storage device 01 is a stable voltage charging mode, and The timer inside the main control unit 1 detects an instantaneous level signal. Specifically, when the timer determines that the user's key press time is less than 500ms, it triggers the switching of voltage and current levels in the electrical signal output by the energy storage unit 01 via a control signal output by the main control unit 1. For example, the power supply control unit 3 will control the voltage and current levels in the electrical signal output by the energy storage unit 01 to switch sequentially in the order of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, and 28V / 5A, according to the control signal output by the main control unit 1. Adjusting the control signal output by the main control unit 1 through the interaction unit 5 enhances the user experience and improves the operational flexibility of the power output control circuit.

[0043] Optional, continue to refer to Figure 2 The voltage conversion unit 2 includes a step-down circuit 05.

[0044] Specifically, the step-down circuit 05 is used to step down the electrical signal provided by the energy storage unit 01, and at the same time, it can amplify the current in the electrical signal provided by the energy storage unit 01, so as to achieve a stable and high current car charger output through the power output control circuit, thereby improving the power supply performance of the portable energy storage device.

[0045] For example, Figure 3 This is a schematic diagram of a step-down circuit provided in an embodiment of this utility model. For example... Figure 3As shown, the step-down circuit 05 may include a first switching transistor Q1, a first inductor L1, a first capacitor C1, and a first diode D1; the gate of the first switching transistor Q1 is connected to the voltage conversion control terminal 11 of the main control unit 1, the drain of the first switching transistor Q1 is connected to the first output terminal 42 of the switching unit 4, and the source of the first switching transistor Q1 is connected to the cathode of the first diode D1 and the first terminal of the first inductor L1, respectively; the second terminal of the first inductor L2 and the first terminal of the first capacitor C1 are both connected to the electrical signal input terminal 021 of the output interface 02; the anode of the first diode D1 and the second terminal of the first capacitor C1 are both grounded.

[0046] It is understood that the gate of the first switching transistor Q1 is connected to the voltage conversion control terminal 11 of the main control unit 1, so that the main control unit 1 can send a pulse width modulation (PWM) signal to the gate of the first switching transistor Q1 through the voltage conversion control terminal 11, thereby controlling the first switching transistor Q1 to turn on or off. In order to realize that when the energy storage unit 01 is in stable voltage charging mode, the voltage and current of the energy storage unit 01 outputting a voltage and current of 28V / 5A is converted into a voltage and current of 12V / 10A through the step-down circuit 05, and the converted electrical signal can be output to the output interface 02 through the electrical signal output terminal 22 of the voltage conversion unit 2, so as to achieve stable and high current car charging output.

[0047] When the main control unit 1 controls the first switching transistor Q1 to turn on, the 28V / 5A electrical signal output by the energy storage unit 01 will be input to the drain of the first switching transistor Q1 through the first output terminal 42 of the switching unit 4. The source of the first switching transistor Q1 is connected to the cathode of the first diode D1 and the first terminal of the first inductor L1. Since the first diode D1 is reverse biased and cut off, the electrical signal output by the energy storage unit 01 can only be output to the first inductor L1 through the source of the first switching transistor Q1. The first inductor L1 can store electrical energy and can supply power to the output interface 02 through the second terminal of the first inductor L1. The supply voltage provided by the first inductor L1 to the output interface 02 will gradually increase. When the main control unit 1 controls the first switching transistor Q1 to turn off, the voltage of the first inductor L1 will not change abruptly, and it can release its stored electrical energy and generate a reverse voltage. At this time, the first diode D1 is forward-biased, so that the electrical energy released by the first inductor L1 can be output to the first capacitor C1 and the output interface 02 through the first diode D1. The capacitor C1 can filter the electrical signal output by the first inductor L1 to smooth the supply voltage output to the output interface 02. Therefore, the main control unit 1 can adjust the duty cycle of the PWM signal sent to the first switching transistor Q1, thereby adjusting the percentage of the conduction time of the first switching transistor Q1 in the total cycle, and thus realize the step-down of the electrical signal output by the energy storage unit 01. For example, when the voltage output from the energy storage unit 01 is converted from 28V to 12V by the step-down circuit 05, the duty cycle of the PWM signal sent to the first switching transistor Q1 can be determined by calculating the quotient of 12V and 28V to achieve voltage reduction. That is, the main control unit 1 can adjust the conduction time of the first switching transistor Q1 to account for 22.9% of the total cycle to achieve voltage reduction. It can also be understood that, based on the law of conservation of power and the power loss in the voltage conversion unit 2, while the voltage output from the energy storage unit 01 is converted from 28V to 12V by the voltage conversion unit 2, the first inductor L1 can also amplify the current output by the energy storage unit 01 from 5A to 10A. Thus, the step-down circuit 05 provides a stable voltage and current signal of 12V / 10A to the output interface 02, improving the power supply performance of the portable energy storage device.

[0048] Optional, continue to refer to Figure 2 The power output control circuit also includes a detection unit 6; the detection terminal 61 of the detection unit 6 is connected to the electrical signal output terminal 22 of the voltage conversion unit 2 and the second output terminal 43 of the switching unit 4 respectively, and the detection signal output terminal 62 of the detection unit 6 is connected to the detection communication terminal 15 of the main control unit 1.

[0049] The detection unit 6 is used to detect the voltage and current values ​​output from the power output control circuit to the output interface 02. For example, the detection unit 6 may include a voltage detection circuit and a current detection circuit, enabling it to detect the voltage and current values ​​output from the electrical signal output terminal 22 of the voltage conversion unit 2 to the output interface 02 when the energy storage unit 01 is in a stable voltage charging mode, and to detect the voltage and current values ​​output from the second output terminal 43 of the switching unit 4 to the output interface 02 when the energy storage unit 01 is in an adjustable voltage charging mode. Simultaneously, the detection signal output terminal 62 of the detection unit 6 is connected to the detection communication terminal 15 of the main control unit 1, allowing the detection unit 6 to transmit the detected voltage and current values ​​from the output to the output interface 02 to the main control unit 1 in real time. This enables the main control unit 1 to obtain the voltage and current values ​​from the output to the output interface 02 in real time, ensuring that the voltage and current values ​​from the output to the output interface 02 meet the current charging requirements of the vehicle load. For example, when the energy storage unit 01 is in stable voltage charging mode, if the main control unit 1 detects that the voltage and current values ​​of the electrical signal output to the output interface 02 deviate from 12V / 10A, the main control unit 1 will adjust the duty cycle of the PWM signal output to the first switching transistor Q1, thereby ensuring the stability and accuracy of the voltage and current of the electrical signal output to the output interface 02 and improving the power supply performance of the portable energy storage device.

[0050] Optionally, the power output control circuit also includes a display unit 7; the display control terminal 16 of the main control unit 1 is connected to the control terminal 71 of the display unit 7.

[0051] The display unit 7 is used to display the detection data of the detection unit 6, specifically the voltage and current values ​​acquired in real time by the detection unit 6 from the output to the output interface 02. For example, the display unit 7 may include a digital tube or a display screen. Specifically, the display control terminal 16 of the main control unit 1 is connected to the control terminal 71 of the display unit 7, enabling the main control unit 1 to control the display unit 7 to illuminate the corresponding digital segments in the digital tube or to refresh the screen based on the real-time detection data acquired by the detection unit 6, thus visually displaying the real-time voltage or current values ​​from the output to the output interface 02. By setting up the display unit 7, the user can intuitively confirm the current output state of the power output control circuit, and the user can easily adjust the output state of the power output control circuit through the interaction unit 5 based on the current output state, thereby improving the operational flexibility of the power output control circuit.

[0052] Optionally, the power output terminal 34 of the power supply control unit 3 is connected to the power input terminal 17 of the main control unit 1 and the power input terminal 72 of the display unit 7, respectively.

[0053] Specifically, before adjusting the voltage and current of the electrical signal output to the output interface 02 via the main control unit 1, the power supply control unit 3 can first communicate with the energy storage unit 01 through the common interface 04 in the protocol chip circuit 03 to request the energy storage unit 01 to output an electrical signal with a specific voltage and current level to the protocol chip circuit 03. This allows the power supply control unit 3 to supply power to both the main control unit 1 and the display unit 7 via the power supply output terminal 34. For example, the voltage and current level of the electrical signal used by the power supply control unit 3 to power the main control unit 1 and the display unit 7 can be 5V / 3A to meet the charging requirements of the main control unit 1 and the display unit 7, thereby ensuring the stability of the power output control circuit. Simultaneously, by using the power supply control unit 3 to uniformly supply power to both the main control unit 1 and the display unit 7, the external power requirement is reduced, thereby simplifying circuit design and reducing the wiring complexity of the power output control circuit.

[0054] Optionally, the power output control circuit also includes a voltage regulator unit 8; the electrical signal input terminal 81 of the voltage regulator unit 8 is connected to the power output terminal 34 of the power supply control unit 3, and the electrical signal output terminal 82 of the voltage regulator unit 8 is connected to the power input terminal 17 of the main control unit 1 and the power input terminal 72 of the display unit 7 respectively.

[0055] Specifically, the electrical signal input terminal 81 of the voltage regulator unit 8 is connected to the power supply output terminal 34 of the power supply control unit 3, so that the voltage regulator unit 8 can receive the power supply signal provided by the power supply control unit 3 to the main control unit 1 and the display unit 7, and can perform voltage regulation on the power supply signal. The electrical signal output terminal 82 of the voltage regulator unit 8 is connected to the power supply input terminal 17 of the main control unit 1 and the power supply input terminal 72 of the display unit 7, so that the voltage regulator unit 8 can provide the regulated power supply signal to the main control unit 1 and the display unit 7 respectively, thereby ensuring the stability of the power supply signal provided to the main control unit 1 and the display unit 7, and eliminating power supply voltage fluctuations caused by load changes or input fluctuations.

[0056] For example, the voltage regulation unit 8 may include a low-dropout regulator (LDO). The LDO can compare the supply voltage provided by the power supply control unit 3 with the reference voltage through its internal error amplifier, and can adjust the on-resistance of its internal switching transistor according to the ratio of the supply voltage to the reference voltage, thereby ensuring that the supply voltage value output by the LDO is constant and improving the operational stability and reliability of the power output control circuit.

[0057] Based on the same inventive concept, this utility model embodiment also provides a portable energy storage device, which includes: an energy storage unit and a power output control circuit as described in the above embodiment.

[0058] Therefore, the portable energy storage device provided in this embodiment has the structure and operation of the power output control circuit of the above embodiment, and can achieve the effect of the power output control circuit of the above embodiment. The similarities can be referred to the above description, and will not be repeated here.

[0059] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power output control circuit for controlling the power output path of an energy storage unit, characterized in that, include: Main control unit, voltage conversion unit, power supply control unit, switching unit, and output interface; The communication signal output terminal of the power supply control unit is connected to the communication signal input terminal of the energy storage unit, the electrical signal input terminal of the power supply control unit is connected to the electrical signal output terminal of the energy storage unit, and the electrical signal output terminal of the power supply control unit is connected to the input terminal of the switching unit. The first output terminal of the switching unit is connected to the electrical signal input terminal of the voltage conversion unit, and the second output terminal of the switching unit and the electrical signal output terminal of the voltage conversion unit are both connected to the output interface. The voltage conversion control terminal of the main control unit is connected to the control terminal of the voltage conversion unit, the switch control terminal of the main control unit is connected to the control terminal of the switch unit, and the power supply control communication terminal of the main control unit is connected to the communication terminal of the power supply control unit.

2. The power output control circuit according to claim 1, characterized in that, Also includes: Interactive unit; The user operation data receiving end of the main control unit is connected to the user operation data sending end of the interaction unit.

3. The power output control circuit according to claim 2, characterized in that, The interaction unit includes at least one of mechanical buttons or touch buttons.

4. The power output control circuit according to claim 1, characterized in that, The power supply control unit includes a protocol chip circuit; the protocol chip circuit integrates a common interface; The communication terminal of the protocol chip circuit is connected to the power supply control communication terminal of the main control unit; the common interface is connected to the communication signal input terminal of the energy storage unit.

5. The power output control circuit according to claim 1, characterized in that, The voltage conversion unit includes a step-down circuit.

6. The power output control circuit according to claim 1, characterized in that, Also includes: Detection unit; The detection terminal of the detection unit is connected to the electrical signal output terminal of the voltage conversion unit and the second output terminal of the switching unit, respectively, and the detection signal output terminal of the detection unit is connected to the detection communication terminal of the main control unit.

7. The power output control circuit according to claim 6, characterized in that, Also includes: Display unit; The display control terminal of the main control unit is connected to the control terminal of the display unit.

8. The power output control circuit according to claim 7, characterized in that, The power supply output terminal of the power supply control unit is connected to the power supply input terminal of the main control unit and the power supply input terminal of the display unit, respectively.

9. The power output control circuit according to claim 8, characterized in that, Also includes: Voltage regulator unit; The electrical signal input terminal of the voltage regulator unit is connected to the power supply output terminal of the power supply control unit, and the electrical signal output terminal of the voltage regulator unit is connected to the power supply input terminal of the main control unit and the power supply input terminal of the display unit, respectively.

10. A portable energy storage device, characterized in that, include: The energy storage unit and the power output control circuit as described in any one of claims 1-9.

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