Energy storage power supply and control circuit thereof

Abstract

The invention discloses an energy storage power supply and a control circuit thereof. The control circuit comprises a plurality of function ports, a switch module, a DC-DC conversion module and a main control module. The first end of the DC-DC conversion module is connected with the plurality of functional ports through the switch module; the main control module is connected with the second end of the DC-DC conversion module, and the main control module is used for sending a control signal to the DC-DC conversion module when at least one functional port is plugged with external equipment; and the DC-DC conversion module is used for controlling and closing the switch module according to the control signal, so that the DC-DC conversion module is conducted with one of the plurality of function ports, and charging or discharging is carried out through the conducted function port. According to the control circuit of the energy storage power supply, different functional ports can be matched with one special line for charging and discharging, the size miniaturization of the energy storage power supply is facilitated, meanwhile, the internal space and the manufacturing cost of the whole energy storage power supply are reduced, and the energy storage power supply is convenient to carry and use by a user.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage power supply and a control circuit thereof. Background Art

[0002] In the related art, the output and input functions of energy storage power supplies are constantly increasing, and different input functions or output functions need to be adapted to corresponding different ports for input or output. Among them, the output functions of the energy storage power supply include, for example, a cigarette lighter function, a USB charging function, etc., and the input functions of the energy storage power supply may include a car battery charging function.

[0003] That is to say, at present, different functional ports of the energy storage power supply need to be matched with corresponding DC-DC circuits, which is not conducive to the miniaturization of the energy storage power supply. It also increases the internal space and manufacturing cost of the entire energy storage power supply, thereby increasing the user's burden of carrying and using the energy storage power supply. Summary of the invention

[0004] In view of this, the present application aims to solve one of the problems in the related art at least to a certain extent. To this end, the purpose of the present application is to provide an energy storage power supply and a control circuit thereof.

[0005] The present application provides a control circuit for an energy storage power supply. The control circuit includes: multiple functional ports, a switch module, a DC-DC conversion module and a main control module. The first end of the DC-DC conversion module is connected to the multiple functional ports through the switch module; the main control module is connected to the second end of the DC-DC conversion module, and the main control module is used to send a control signal to the DC-DC conversion module when at least one of the functional ports is plugged in with an external device; the DC-DC conversion module is used to control the closing of the switch module according to the control signal, so that the DC-DC conversion module is connected to one of the multiple functional ports, so as to charge or discharge through the connected functional port.

[0006] In some embodiments, the switch module includes a plurality of switch units, which are arranged one by one corresponding to the functional ports, and the switch units are arranged between the DC-DC conversion module and the functional ports; the main control module is used to send a control signal to the DC-DC conversion module to control the closing of the switch unit when an external device is plugged into the functional port, so that the DC-DC conversion module is connected to the functional port, so as to charge or discharge through the functional port.

[0007] In some embodiments, the functional port includes a car charger cigarette lighter port, and the control circuit further includes: a voltage detection module. The voltage detection module is connected to the car charger cigarette lighter port, and the voltage detection module is used to detect the voltage of the car charger cigarette lighter port and output the voltage detection result; the main control module is connected to the voltage detection module, and the main control module is used to send the control signal to the DC-DC conversion module according to the voltage detection result to control the closing of the switch unit, so that the DC-DC conversion module is connected to the corresponding car charger cigarette lighter port, so as to charge or discharge through the car charger cigarette lighter port.

[0008] In some embodiments, the voltage detection module includes a voltage detection unit and a resistor, the first end of the voltage detection unit is connected to the first connection end of the car charger cigarette lighter port, the second end of the voltage detection unit is connected to the main control module, the first end of the resistor is connected to the second connection end of the car charger cigarette lighter port, the second end of the resistor is connected to the main control module, and the voltage detection unit is used to detect the voltage of the car charger cigarette lighter port and output the voltage detection result to the main control module.

[0009] In some embodiments, the main control module is further used to determine whether the voltage in the voltage detection result is within a preset voltage range, so as to determine whether the external device plugged into the vehicle charger cigarette lighter port is a charging device or a load discharging device.

[0010] In some embodiments, the main control device is also used for: if it is determined that the external device plugged into the cigarette lighter port of the car charger is a charging device, then real-time detection of whether the voltage of the cigarette lighter port of the car charger is a first rated voltage value corresponding to the first charging device or a second rated voltage value corresponding to the second charging device; if it is detected that the voltage of the cigarette lighter port of the car charger is the first rated voltage value or the second rated voltage value, setting a preset time for the external device to charge the energy storage power supply through the cigarette lighter port of the car charger, and within the preset time, detecting that the voltage of the cigarette lighter port of the car charger is less than or equal to the first set value or the voltage of the cigarette lighter port of the car charger is less than or equal to the second set value, determining that the external device is a battery, and then controlling the DC-D The power conversion direction of the C conversion module is switched from the charging direction to the discharging direction, and the switch unit corresponding to the car charger cigarette lighter port is controlled to be closed, so that the car charger cigarette lighter port is adjusted from the charging mode to the external discharging mode; if it is detected that the voltage of the car charger cigarette lighter port is the first rated voltage value or the second rated voltage value, the external device charges the energy storage power supply through the car charger cigarette lighter port within a preset time, and if it is detected that the voltage of the car charger cigarette lighter port is greater than the first set value or the voltage of the car charger cigarette lighter port is greater than the second set value within the preset time, the power conversion direction of the DC-DC conversion module is controlled to remain in the charging direction, so that the car charger cigarette lighter port remains in the charging mode.

[0011] In some embodiments, the external device plugged into the functional port is communicatively connected to the main control module via a preset communication protocol, and the main control module is used to determine whether the external device plugged into the functional port is a charging device or a load discharging device via the preset communication protocol.

[0012] In certain embodiments, the main control module is used to: when it is determined that at least two of the functional ports are connected to external devices, control the switch module to close according to a priority order so that the DC-DC conversion module is connected to the functional port with a high priority; the priority order is based on a preset priority order or based on a control instruction issued by a user.

[0013] In some embodiments, the DC-DC conversion module includes a power switch control unit and a power control unit; the first end of the power switch control unit is connected to the functional port, and the second end of the power switch control unit is connected to the main control module; the power switch control unit is used to control the switch unit to close or open according to the control signal sent by the main control module; the first end of the power power control unit is connected to the functional port, and the second end of the power power control unit is connected to the power switch control unit; the power control unit is used to control the charging power and discharging power of the functional port.

[0014] In some embodiments, the control circuit also includes a battery management control module, a battery module and a battery switch module; the first end of the battery management control module is connected to the main control module, and the second end of the battery management control module is connected to the first end of the battery switch module; the second end of the battery switch module is connected to the third end of the DC-DC conversion module, and the third end of the battery switch module is connected to the battery module; the battery module is used to store electrical energy; the battery management control module detects the charging or discharging status of the battery module in real time and sends the detection result to the main control module, and the main control module sends a control signal to the battery management control module according to the detection result, and the battery management control module controls the battery switch module to close or open according to the control signal to control the on and off of the charging or discharging process of the battery module.

[0015] The present application also provides an energy storage power supply. The energy storage power supply includes the control circuit described in any one of the above embodiments.

[0016] In the control circuit of the energy storage power supply of the present application, the internal charging or discharging circuits of the car charger cigarette lighter port and the USB port can share a line, so that different functional ports can be matched to use a dedicated line for charging and discharging. This is conducive to the miniaturization of the energy storage power supply, and also reduces the internal space and manufacturing cost of the entire energy storage power supply, making it easier for users to carry and use the energy storage power supply.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of a control circuit of an energy storage power supply in certain embodiments of the present application;

[0020] Figure 2 It is a control flow diagram of a control circuit of an energy storage power supply in certain embodiments of the present application. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0022] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, and may refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection, or mutual communication; direct connection, indirect connection through an intermediate medium, internal connection between two elements, or interaction between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0026] See also Figure 1 The present application discloses a control circuit 10 of an energy storage power supply. The control circuit 10 includes: a plurality of functional ports 11, a switch module 12, a DC-DC conversion module 13 and a main control module 14. The first end of the DC-DC conversion module 13 is connected to the plurality of functional ports 11 through the switch module 12. The main control module 14 is connected to the second end of the DC-DC conversion module 13, and the main control module 14 is used to send a control signal to the DC-DC conversion module 13 when at least one functional port 11 is plugged with an external device. The DC-DC conversion module 13 is used to control the closing of the switch module 12 according to the control signal, so that the DC-DC conversion module 13 is connected to one of the plurality of functional ports 11, so as to charge or discharge through the turned-on functional port 11.

[0027] Specifically, the multiple functional ports 11 may include, for example, a car charger cigarette lighter port, a USB port, etc., without limitation. The multiple functional ports 11 may be 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, without limitation.

[0028] The DC-DC conversion module 13 can realize bidirectional conversion of electric energy. That is, the DC-DC conversion module 12 can convert the battery current into direct current of different voltages. The energy storage power supply can be DC discharged through the DC-DC conversion module 13, and the energy storage power supply can also be DC charged through the DC-DC conversion module 13. For example, the DC-DC conversion module 13 can be a module composed of a USB-C bidirectional buck-boost power circuit. The USB-C bidirectional buck-boost power circuit is a special power management circuit that combines the functions of BUCK (step-down) and BOOST (boost) circuits, and can automatically adjust the output voltage according to the input voltage and load requirements to achieve bidirectional conversion of electric energy.

[0029] That is to say, the control circuit 10 inside the energy storage power supply of the present application can control the switch module 12 through the main control module 14 to realize the conduction between at least one functional port 11 and a DC-DC conversion module 13, so that different functional ports 11 can be charged and discharged through only one DC-DC conversion module 13, that is, different functional ports 11 can only match and use one dedicated line for charging and discharging, which is conducive to the miniaturization of the energy storage power supply.

[0030] The main control module 14 can send a control signal to the DC-DC conversion module 13 when at least one functional port 11 is plugged with an external device. The DC-DC conversion module 13 controls the closing switch module 12 according to the control signal, so that the DC-DC conversion module 13 is connected to one of the multiple functional ports 11, so as to charge or discharge through the connected functional port 11. For example, one of the multiple functional ports 11 can be a car charger cigarette lighter port. When the car charger cigarette lighter port is plugged with an external device, the main control module 14 can send a control signal to the DC-DC conversion module 13. The DC-DC conversion module 13 controls the closing switch module 12 according to the control signal so that the DC-DC conversion module 13 is connected to the car charger cigarette lighter port, so as to charge or discharge through the car charger cigarette lighter port. Among them, the main control module 14 can be, for example, an MCU controller.

[0031] It can be understood that when the external device plugged into the car charger port is a charging device, it is charged through the car charger port, and when the external device is a load discharge device, it is discharged through the car charger port. That is, the car charger port of the present application has stronger adaptability and improves the user experience.

[0032] In this way, in the control circuit 10 of the energy storage power supply of the present application, the internal charging or discharging circuits of the car charger cigarette lighter port and the USB port can share a line, so that different functional ports 11 can be matched to use a dedicated line for charging and discharging. This is conducive to the miniaturization of the energy storage power supply, and also reduces the internal space and manufacturing cost of the entire energy storage power supply, making it easier for users to carry and use the energy storage power supply.

[0033] See also Figure 1 In some embodiments, the switch module 12 includes a plurality of switch units 121. The switch units 121 are arranged one by one corresponding to the functional ports 11, and the switch units 121 are arranged between the DC-DC conversion module 13 and the functional port 11. The main control module 14 is used to send a control signal to the DC-DC conversion module 13 to control the switch unit 121 to close when an external device is plugged into the functional port 11, so that the DC-DC conversion module 13 is connected to the functional port 11, so as to charge or discharge through the functional port 11.

[0034] Specifically, the switch unit 121 may be a MOS tube. The control signal may be a voltage signal or a current signal, which is not limited here.

[0035] For example, Figure 1 As shown, the function port 11 includes a first function port 111 and a second function port 112, and the switch module 12 includes a first switch unit 12111 and a second switch unit 1212. The first switch unit 1211 is arranged between the DC-DC conversion module 13 and the first function port 111, and the second switch unit 1212 is arranged between the DC-DC conversion module 13 and the second function port 112. The main control module 14 is used to send a first control signal to the DC-DC conversion module 13 to control the first switch unit 1211 to close when an external device is inserted into the first function port 111, so that the DC-DC conversion module 13 is connected to the first function port 111, so as to charge or discharge through the first function port 111, or to send a second control signal to the DC-DC conversion module 13 to control the second switch unit 1212 to close when an external device is inserted into the second function port 112, so as to charge or discharge through the second function port 112.

[0036] The first switch unit 1211 and the second switch unit 1212 may both be MOS transistors. The first control signal and the second control signal may be voltage signals or current signals, which are not limited here.

[0037] That is to say, in the control circuit 10 of the present application, a separate switch unit 121 can be used to control the conduction between a functional port 11 and a DC-DC conversion module 13, so that the charging and discharging process of a functional port 11 can be controlled by a DC-DC conversion module 13.

[0038] In some embodiments, the first functional port 111 includes a car charger cigarette lighter port, and the control circuit 10 further includes a voltage detection module 15. The voltage detection module 15 is connected to the car charger cigarette lighter port, and the voltage detection module 15 is used to detect the voltage of the car charger cigarette lighter port and output the voltage detection result. The main control module 14 is connected to the voltage detection module 15, and the main control module 14 is used to send a control signal to the DC-DC conversion module 13 according to the voltage detection result to control the closing switch unit 121, so that the DC-DC conversion module 13 is connected to the corresponding car charger cigarette lighter port, so as to charge or discharge through the car charger cigarette lighter port.

[0039] Specifically, the voltage detection result is a result including a specific voltage value, or a voltage interval including multiple voltage values. For example, the voltage detection result may be 11V, or the voltage detection result may be a variation interval of 11V to 12V.

[0040] That is, a voltage detection module 15 is provided in the control circuit 10 of the energy storage power supply of the present application to detect the voltage of the car charger cigarette lighter port in real time, so that the main control module 14 can send a first control signal to the DC-DC conversion module 13 in real time according to the voltage detection result, thereby realizing the charging or discharging of the external device through the car charger cigarette lighter port in a timely manner.

[0041] In this way, the present application can detect the voltage of the car charger cigarette lighter port by the logic of the main control module 14, and realize the process of the energy storage power supply supplying power to the external device or the charging device charging the energy storage power supply through the car charger cigarette lighter port. The adaptability of the car charger cigarette lighter port is stronger, which improves the user experience.

[0042] In some embodiments, the voltage detection module 15 includes a voltage detection unit 151 and a resistor 152. The first end of the voltage detection unit 151 is connected to the first connection end of the car charger cigarette lighter port, and the second end of the voltage detection unit 151 is connected to the main control module 14. The first end of the resistor 152 is connected to the second connection end of the car charger cigarette lighter port, and the second end of the resistor 152 is connected to the main control module 14. The voltage detection unit 151 is used to detect the voltage of the car charger cigarette lighter port and output the voltage detection result to the main control module 14.

[0043] Specifically, the voltage detection unit 151 may be a voltmeter or other voltage detection instruments, which is not limited herein.

[0044] The voltage detection results may include three situations: (1) the voltage at the cigarette lighter port of the car charger is within the numerical range of 11V to 16V; (2) the voltage at the cigarette lighter port of the car charger is within the numerical range of 16V to 30V; (3) the voltage at the cigarette lighter port of the car charger is less than 11V, or the voltage is greater than 30V.

[0045] That is, in the control circuit 10 of the present application, the car charger cigarette lighter port and the voltage detection unit 151, the resistor 152 and the main control module 14 can form a loop, and the voltage detection unit 151 can detect the voltage value of the car charger cigarette lighter port, thereby outputting the voltage detection result to the main control module 14, so that the main control module 14 can determine whether the external device plugged into the car charger cigarette lighter port is a charging device or a load discharge device according to the voltage detection result.

[0046] In some embodiments, the main control module 14 is further used to determine whether the voltage in the voltage detection result is within a preset voltage range, so as to determine whether the external device plugged into the cigarette lighter port of the vehicle charger is a charging device or a load discharging device.

[0047] Specifically, the charging device includes a vehicle charger and a PV (solar panel) charging device. The preset voltage range may include two ranges, a voltage in a numerical range of 11V to 16V and a voltage in a numerical range of 16V to 30V.

[0048] When an external device is plugged into the cigarette lighter port of the vehicle charger, the voltage detection module 15 starts to work. If the detected voltage is within the value range of 11V to 16V, this is consistent with the charging voltage characteristics of the vehicle charger, so it can be determined that the external device is a vehicle charger, which is used to charge the energy storage power supply.

[0049] If the voltage detected by the voltage detection module 15 is within the value range of 16V to 30V, which meets the charging voltage characteristics of the PV charging device, it can be determined that the external device is a PV charging device, and the PV charging device is used to charge the energy storage power supply.

[0050] If the voltage detected by the voltage detection module 15 is not within the above two ranges, and the car charger cigarette lighter port is in a discharging state (i.e., the energy storage power supply is used as a power output), it can be determined that the external device is a load discharge device, i.e., the load discharge device is used to obtain power from the energy storage power supply through the car charger cigarette lighter port.

[0051] In this way, the control circuit 10 of the present application can detect the voltage of the car charger cigarette lighter port in real time by setting up a voltage detection module 15, and the main control module 14 identifies whether the external device plugged into the car charger cigarette lighter port is a charging device or a load discharge device according to the voltage, so that the charging device can charge the energy storage power supply through the car charger cigarette lighter port, and the energy storage power supply can discharge the load discharge device through the car charger cigarette lighter port.

[0052] See also Figure 2 In some embodiments, the main control module 14 is also used to: if it is determined that the external device plugged into the car charger cigarette lighter port is a charging device, then real-time detection is performed to determine whether the voltage of the car charger cigarette lighter port is the first rated voltage value corresponding to the first charging device or the second rated voltage value corresponding to the second charging device. If it is detected that the voltage of the car charger cigarette lighter port is the first rated voltage value or the second rated voltage value, the external device is set to charge the energy storage power supply through the car charger cigarette lighter port within a preset time, and it is detected that the voltage of the car charger cigarette lighter port is less than or equal to the first set value or the voltage of the car charger cigarette lighter port is less than or equal to the second set value within the preset time, and it is determined that the external device is a battery, then the power conversion direction of the DC-DC conversion module is controlled to switch from the charging direction to the discharging direction, and the switch unit 121 corresponding to the car charger cigarette lighter port is controlled to be closed, so that the car charger cigarette lighter port is adjusted from the charging mode to the external discharging mode. If it is detected that the voltage of the car charger cigarette lighter port is the first rated voltage value or the second rated voltage value, the external device charges the energy storage power supply through the car charger cigarette lighter port within a preset time, and if it is detected that the voltage of the car charger cigarette lighter port is greater than the first set value or the voltage of the car charger cigarette lighter port is greater than the second set value within the preset time, the power conversion direction of the DC-DC conversion module 13 is controlled to remain in the charging direction, so that the car charger cigarette lighter port remains in the charging mode.

[0053] Specifically, the first charging device may be a vehicle charger, and the first rated voltage value may be 12 V. Correspondingly, the first set value may be a value lower than 12 V, for example, the first set value may be 10 V, 10.1 V, 10.2 V, 10.5 V, 10.9 V, 11 V, 11.1 V, 11.3 V, 11.4 V or 11.5 V, which is not limited here.

[0054] The second charging device may be a PV charging device, and the second rated voltage value may be 24 V. Correspondingly, the second set value may be a value lower than 24 V, for example, the first set value may be 21 V, 21.5 V, 21.8 V, 21.9 V, 23 V, 23.1 V, 23.2 V, 23.3 V, 23.5 V or 23.6 V, which is not limited here.

[0055] The preset time can be 2min, 2.1min, 2.2min, 2.3min, 3min, 3.5min, 3.7min, 3.9min, 4min or 4.5min, and there is no limitation here.

[0056] Understandably, if Figure 2 As shown, when the voltage of the cigarette lighter port of the car charger is detected to be 12V or 24V, the energy storage power supply can be set to charge for a few minutes, that is, the plugged-in external device is set to charge the energy storage power supply through the cigarette lighter port of the car charger within a preset time. If during this preset time, it is detected that the voltage of the cigarette lighter port of the car charger drops to a voltage value below the first set value or the second set value, it usually means that the plugged-in external device is a car battery, and the car battery is insufficient, so it is determined that the car battery needs to be charged at this time. At this time, the main control module 14 in the control circuit 10 will send a control signal to control the power conversion direction of the DC-DC conversion module 13 to switch from the charging direction to the discharging direction, and control the closing of the first switch unit 1211, so that the energy storage power supply charges the car battery. Figure 2 The DC-DC conversion module 13 is a bidirectional DC-DC module.

[0057] If during this preset time, it is detected that the voltage of the cigarette lighter port of the car charger has not dropped below the first set value or the second set value, which usually means that the power of the plugged-in external device is sufficient. At this time, the main control module 14 in the control circuit 10 will send a control signal to control the power conversion direction of the DC-DC conversion module 13 to remain in the charging direction, so that the first functional port 111 remains in the charging mode, so that the external device can charge the energy storage power supply normally.

[0058] In this way, when the main control module 14 determines that the external device plugged into the first function port 111 is a charging device, the control circuit 10 of the present application can determine whether the power of the charging device is sufficient by real-time detecting whether the voltage of the car charger port is less than or equal to the set value within a preset time, thereby automatically identifying the state in which the energy storage power supply needs to charge the car battery.

[0059] In some embodiments, the external device plugged into the function port 11 is connected to the main control module 14 through a preset communication protocol, and the main control module 14 is used to determine whether the external device plugged into the function port 11 is a charging device or a load discharging device through the preset communication protocol.

[0060] Specifically, this embodiment is described by taking the functional port 11 as a USB port as an example.

[0061] When the preset communication protocol meets the communication protocol corresponding to the charging device, the main control module 14 determines that the external device plugged into the USB port is a charging device by setting the preset communication protocol as the communication protocol corresponding to the charging device.

[0062] When the preset communication protocol meets the communication protocol corresponding to the load discharge device, the main control module 14 determines that the external device plugged into the USB port is a load discharge device by setting the preset communication protocol as the communication protocol corresponding to the load discharge device.

[0063] In some embodiments, the main control module 14 is further used to: when it is determined that at least two function ports are plugged with external devices, control the switch module to close according to the priority order so that the DC-DC conversion module is connected to the high-priority function port. The priority order is based on a preset priority order or based on a control instruction issued by a user.

[0064] That is, the priority order of the present application may be a control order preset within the main control module 14, or may be a control order customized by the user, and is not limited here.

[0065] Therefore, if Figure 2 As shown, when the main control module 14 determines that both the USB port and the car charger cigarette lighter port are plugged with external devices, since the voltages required for the USB port and the car charger cigarette lighter output are different, it is necessary to determine the priority of the port output, and the priority USB port can be set to the highest. If the external device is a load discharge device, when the external device at the USB port is fully charged, the main control module 14 can automatically send a control signal to the DC-DC conversion module 13, thereby controlling the first switch unit 1211 described above to be disconnected and the second switch unit 1212 to be closed through the DC-DC conversion module 13 to switch to powering the external device at the car charger cigarette lighter port.

[0066] At this time, if the user feels that the external device plugged into the car charger cigarette lighter port needs a higher priority, the user can double-click the control button corresponding to the main control module 14 to issue a control instruction, so that the control circuit 10 can switch to the external device with priority to the car charger cigarette lighter port for power supply. When the external device at the car charger cigarette lighter port is fully charged, the main control module 14 can automatically send a control signal to the DC-DC conversion module 13, thereby controlling the first switch unit 1211 mentioned above to close and the second switch unit 1212 to open to automatically switch to powering the USB port.

[0067] In this way, when the main control module 14 in the control circuit 10 of the present application determines that at least two functional ports 11 are plugged into external devices, it can control the switch module 12 to close through a preset priority order or a control instruction issued by the user to connect the DC-DC conversion module to the high-priority functional port, thereby realizing the charging or discharging process of the external devices plugged into different functional ports 11.

[0068] See also Figure 1 In some embodiments, the DC-DC conversion module 13 includes a power switch control unit 131 and a power control unit 132 .

[0069] The first end of the power switch control unit 131 is connected to the function port 11, and the second end of the power switch control unit 132 is connected to the main control module 14. The power switch control unit 131 is used to control the switch unit 121 to close or open according to the control signal sent by the main control module 14.

[0070] A first end of the power control unit 132 is connected to the function port 11 , and a second end of the power control unit 132 is connected to the power switch control unit 131 ; the power control unit 132 is used to control the charging power and discharging power of the function port 11 .

[0071] Specifically, the power switch control unit 131 is a control device composed of a bidirectional BUCK-BOOST power circuit, wherein the charging and discharging functions of the bidirectional BUCK-BOOST power circuit can be controlled by the logic judgment of the main control module 14 .

[0072] In this way, the modules in the control circuit 10 of the present application are highly integrated, and the charging and discharging functions, charging power, discharging power, and closing and opening of the switch unit 121 inside the power switch control unit 131 can be controlled through the logic control of the main control module 14, thereby realizing the function of charging or discharging the energy storage power supply through the same functional port.

[0073] In some embodiments, the control circuit 10 further includes a battery management control module 16, a battery module 17, and a battery switch module 18. A first end of the battery management control module 16 is connected to the main control module 14, and a second end of the battery management control module 16 is connected to a first end of the battery switch module 18. A second end of the battery switch module 18 is connected to a third end of the DC-DC conversion module 13, and a third end of the battery switch module 18 is connected to the battery module 17. The battery module 17 is used to store electrical energy. The battery management control module 16 detects the charging or discharging state of the battery module 17 in real time and sends the detection result to the main control module 14. The main control module 14 sends a control signal to the battery management control module 16 according to the detection result. The battery management control module 16 controls the battery switch module 18 to close or open according to the control signal to control the on and off of the charging or discharging process of the battery module 17.

[0074] For example, when a charging device is plugged into the first function port 111, the main control module 14 can determine that the first function port 111 is in charging mode through the voltage output by the voltage detection module 15. Therefore, the main control module 14 can simultaneously send a control signal to the battery management control module 16, so that the battery management control module 16 can control the battery switch module 18 to close according to the control signal sent by the main control module 14, so as to control the charging device to start charging the battery module 17.

[0075] After charging for a period of time, when the detection result output by the battery management control module 16 determines that the battery module 17 is in an overcharged state, the main control module 14 can send a control signal to the battery management control module 16 based on the detection result, so that the battery management control module 16 can control the battery switch module 18 to disconnect according to the control signal sent by the main control module 14, so as to control the charging equipment to stop charging the battery module 17 and avoid overcharging of the battery module 17.

[0076] For another example, when a USB charging device is plugged into the second function port 112, the main control module 14 will determine that the second function port 112 is in charging mode through the communication protocol. Therefore, the main control module 14 can simultaneously send a control signal to the battery management control module 16, so that the battery management control module 16 can control the battery switch module 18 to close according to the control signal sent by the main control module 14, so as to control the USB charging device to start charging the battery module 17. The USB charging device can be, for example, Figure 2 The PD charger shown in .

[0077] After charging for a period of time, when the detection result output by the battery management control module 16 determines that the battery module 17 is in an overcharged state, the main control module 14 can send a control signal to the battery management control module 16 according to the detection result, so that the battery management control module 16 can control the battery switch module 18 to disconnect according to the control signal sent by the main control module 14, so as to control the USB charging device to stop charging the battery module 17, thereby avoiding overcharging of the battery module 17.

[0078] For another example, when a load discharge device is plugged into the first function port 111, the main control module 14 can determine that the first function port 111 is in the discharge mode through the voltage output by the voltage detection module 15. Therefore, the main control module 14 can simultaneously send a control signal to the battery management control module 16, so that the battery management control module 16 can control the battery switch module 18 to close according to the control signal sent by the main control module 14, so as to control the battery module 17 to start discharging the load discharge device.

[0079] After charging for a period of time, when the detection result output by the battery management control module 16 determines that the battery module 17 is in an over-discharge state, the main control module 14 can send a control signal to the battery management control module 16 according to the detection result, so that the battery management control module 16 can control the battery switch module 18 to disconnect according to the control signal sent by the main control module 14, so as to control the battery module 17 to stop discharging the load discharge device, thereby avoiding over-discharge of the battery module 17.

[0080] In this way, the control circuit 10 of the energy storage power supply of the present application can be provided with a battery management control module 16 to ensure that the battery module 17 is not overcharged or over-discharged, thereby protecting the safe use of the battery module 17 and extending the service life of the battery module 17.

[0081] In addition, if Figure 1 As shown, the control circuit 10 of the present application may also include a feedback output voltage control module. The feedback output voltage control module is connected to the power switch control unit 131 in the DC-DC conversion module 13. Since the DC / DC converter in the power switch control unit 131 utilizes the energy storage characteristics of capacitors and inductors, a high-frequency switching action is performed through a controllable switch (such as MOSFET, etc.), and the input electrical energy is stored in the capacitor or inductor, and released to the load when the switch is disconnected. The feedback output voltage control module adjusts the stability and accuracy of the output voltage of the DC / DC converter through a feedback mechanism, so that the DC / DC converter can provide a stable DC voltage to the load.

[0082] The present application also provides an energy storage power supply, which includes the control circuit 10 described in any one of the above embodiments.

[0083] In this way, in the control circuit 10 of the energy storage power supply of the present application, the internal charging or discharging circuits of the car charger cigarette lighter port and the USB port can share a line, so that different functional ports 11 can be matched to use a dedicated line for charging and discharging. This is conducive to the miniaturization of the energy storage power supply, and also reduces the internal space and manufacturing cost of the entire energy storage power supply, making it easier for users to carry and use the energy storage power supply.

[0084] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A control circuit of an energy storage power supply, characterized in that: The control circuit comprises: Multiple functional ports; Switch module; A DC-DC conversion module, a first end of which is connected to the plurality of functional ports through the switch module; and A main control module, the main control module is connected to the second end of the DC-DC conversion module, the main control module is used to send a control signal to the DC-DC conversion module when at least one of the functional ports is plugged into an external device; the DC-DC conversion module is used to control the closing of the switch module according to the control signal, so that the DC-DC conversion module is connected to one of the multiple functional ports, so as to charge or discharge through the connected functional port.

2. The control circuit of the energy storage power supply according to claim 1, characterized in that: The switch module includes a plurality of switch units, the switch units are arranged one by one corresponding to the functional ports, and the switch units are arranged between the DC-DC conversion module and the functional ports; The main control module is used to send a control signal to the DC-DC conversion module to control the switch unit to close when an external device is plugged into the functional port, so that the DC-DC conversion module is connected to the functional port to charge or discharge through the functional port.

3. The control circuit of the energy storage power supply according to claim 2, characterized in that: The functional port includes a car charger cigarette lighter port, and the control circuit also includes: A voltage detection module, the voltage detection module is connected to the car charger cigarette lighter port, the voltage detection module is used to detect the voltage of the car charger cigarette lighter port and output the voltage detection result; The main control module is connected to the voltage detection module, and the main control module is used to send the control signal to the DC-DC conversion module according to the voltage detection result to control the closing of the switch unit, so that the DC-DC conversion module is connected to the corresponding car charger cigarette lighter port to charge or discharge through the car charger cigarette lighter port.

4. The control circuit of the energy storage power supply according to claim 3, characterized in that: The voltage detection module includes a voltage detection unit and a resistor, the first end of the voltage detection unit is connected to the first connection end of the car charger cigarette lighter port, the second end of the voltage detection unit is connected to the main control module, the first end of the resistor is connected to the second connection end of the car charger cigarette lighter port, the second end of the resistor is connected to the main control module, the voltage detection unit is used to detect the voltage of the car charger cigarette lighter port and output the voltage detection result to the main control module.

5. The control circuit of the energy storage power supply according to claim 4, characterized in that: The main control module is also used for: It is determined whether the voltage in the voltage detection result is within a preset voltage range to determine whether the external device plugged into the cigarette lighter port of the vehicle charger is a charging device or a load discharging device.

6. The control circuit of the energy storage power supply according to claim 5, characterized in that: The main control device is also used for: If it is determined that the external device plugged into the cigarette lighter port of the car charger is a charging device, real-time detection is performed to determine whether the voltage of the cigarette lighter port of the car charger is a first rated voltage value corresponding to the first charging device or a second rated voltage value corresponding to the second charging device; If it is detected that the voltage of the car charger cigarette lighter port is the first rated voltage value or the second rated voltage value, the external device is set to charge the energy storage power supply through the car charger cigarette lighter port within a preset time, and if it is detected that the voltage of the car charger cigarette lighter port is less than or equal to the first set value or the voltage of the car charger cigarette lighter port is less than or equal to the second set value within the preset time, it is determined that the external device is a battery, and the power conversion direction of the DC-DC conversion module is controlled to switch from the charging direction to the discharging direction, and the switch unit corresponding to the car charger cigarette lighter port is controlled to be closed, so that the car charger cigarette lighter port is adjusted from the charging mode to the external discharging mode; If it is detected that the voltage of the car charger cigarette lighter port is the first rated voltage value or the second rated voltage value, the external device is set to charge the energy storage power supply through the car charger cigarette lighter port within a preset time, and if it is detected that the voltage of the car charger cigarette lighter port is greater than the first set value or the voltage of the car charger cigarette lighter port is greater than the second set value within the preset time, the power conversion direction of the DC-DC conversion module is controlled to remain in the charging direction, so that the car charger cigarette lighter port remains in the charging mode.

7. The control circuit of the energy storage power supply according to claim 2, characterized in that: The external device plugged into the functional port is communicatively connected to the main control module via a preset communication protocol, and the main control module is used to determine whether the external device plugged into the functional port is a charging device or a load discharging device via the preset communication protocol.

8. The control circuit of the energy storage power supply according to claim 1, characterized in that: The main control module is used to: when it is determined that at least two of the functional ports are plugged with external devices, control the switch module to close according to the priority order so that the DC-DC conversion module is connected to the functional port with a high priority; The priority order is based on a preset priority order or based on a control instruction issued by a user.

9. The control circuit of the energy storage power supply according to claim 2, characterized in that: The DC-DC conversion module includes a power switch control unit and a power control unit; The first end of the power switch control unit is connected to the functional port, and the second end of the power switch control unit is connected to the main control module; The power switch control unit is used to control the switch unit to close or open according to the control signal sent by the main control module; The first end of the electric power control unit is connected to the functional port, and the second end of the electric power control unit is connected to the power switch control unit; the electric power control unit is used to control the charging power and discharging power of the functional port.

10. The control circuit of the energy storage power supply according to claim 1, characterized in that: The control circuit further comprises a battery management control module, a battery module and a battery switch module; a first end of the battery management control module is connected to the main control module, a second end of the battery management control module is connected to a first end of the battery switch module; a second end of the battery switch module is connected to a third end of the DC-DC conversion module, and a third end of the battery switch module is connected to the battery module; The battery module is used to store electrical energy; The battery management control module detects the charging or discharging status of the battery module in real time and sends the detection result to the main control module. The main control module sends a control signal to the battery management control module according to the detection result. The battery management control module controls the battery switch module to close or open according to the control signal to control the on and off of the charging or discharging process of the battery module.

11. An energy storage power supply, characterized in that: The energy storage power supply comprises the control circuit described in claims 1 to 10.

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