Charging circuit and mobile emergency energy storage system

Abstract

The utility model provides a power supply circuit and a mobile emergency energy storage system. The power supply circuit comprises at least two power supply units and a first switch piece. The power supply unit comprises a power supply and a charging port, and the power supply is used for supplying power to external equipment through the charging port; the first switch piece is arranged between two adjacent electricity supplementing units; when the charging circuit is in the first charging state, the first switch piece is switched on to enable the power supply of the second charging unit to be output to the charging port of the first charging unit. When the electricity supplementing circuit is in the second electricity supplementing state, the first switch piece is switched on to isolate the first electricity supplementing unit and the second electricity supplementing unit; in other words, the two charging units can be selected according to actual requirements to charge different external devices through the respective charging ports, or the two charging units can be selected to charge the same external device through the charging port of one of the two charging units, and the power supply flexibility of the charging circuit and the mobile emergency energy storage system can be improved.

Description

Technical Field

[0001] The present application belongs to the field of mobile emergency energy storage technology, and in particular relates to a power replenishment circuit and a mobile emergency energy storage system. Background Art

[0002] With the rapid development of the electric vehicle industry, the penetration rate of electric vehicles has increased year by year, especially in urban public transportation, logistics, and private vehicles. However, the range and charging efficiency of electric vehicles have always been key factors restricting their widespread adoption. The need for rapid recharging of electric vehicles is particularly urgent during emergency rescue, emergencies, or long-distance travel.

[0003] Currently, mobile emergency energy storage systems are often deployed to power electric vehicles and other electrical equipment. However, these systems often rely on a limited number of charging cables, typically only two, to simultaneously power two small electric vehicles or one large electric bus (two cables per vehicle). This results in a single charging method and limited flexibility.

[0004] Therefore, how to improve the flexibility of power replenishment of the device is a problem that those skilled in the art currently need to solve. Utility Model Content

[0005] The purpose of this application is to provide a power replenishment circuit and a mobile emergency energy storage system, aiming to solve the problem of low flexibility in current equipment power replenishment.

[0006] A first aspect of an embodiment of the present application provides a power compensation circuit, comprising:

[0007] At least two power replenishment units, each comprising a power supply and a charging port, wherein the power supply is used to replenish power for an external device through the charging port; wherein the at least two power replenishment units include a first power replenishment unit and a second power replenishment unit;

[0008] a first switch element, disposed between two adjacent power supply units, with one end of the first switch element connected between the charging port of the first power supply unit and the power supply, and the other end of the first switch element connected between the charging port of the second power supply unit and the power supply;

[0009] The power-compensating circuit has a first power-compensating state and a second power-compensating state. When the power-compensating circuit is in the first power-compensating state, the first switch is turned on to output the power supply of the second power-compensating unit to the charging port of the first power-compensating unit. When the power-compensating circuit is in the second power-compensating state, the first switch is turned on to isolate the first power-compensating unit from the second power-compensating unit.

[0010] In some embodiments of the present application, each of the power replenishing units has at least two charging ports, and a second switch is provided between the two charging ports. The power replenishing unit has a third power replenishing state and a fourth power replenishing state. When the power replenishing unit is in the third power replenishing state, the second switch is closed to replenish power for the same external device through the two charging ports. When the power replenishing unit is in the fourth power replenishing state, the second switch is opened to isolate the two charging ports.

[0011] In some embodiments of the present application, the power replenishment circuit further includes a detection unit, which is used to detect the charging level of each of the external devices. When the external device is fully charged, the first switch is closed to call the first power supply to power other power replenishment units; the first power supply is the power supply in the power replenishment unit corresponding to the fully charged external device.

[0012] In some embodiments of the present application, when one of the external devices corresponding to the power supplement unit is fully charged, the second switch is closed to connect the two charging ports in the power supplement unit in parallel.

[0013] In some embodiments of the present application, a third switch element is provided between each charging port and the corresponding first switch element, and the third switch element is used to disconnect when the external device connected to the corresponding charging port is fully charged.

[0014] In some embodiments of the present application, the power replenishment circuit further includes a monitoring unit, which is used to detect whether the external device on the charging port meets the charging conditions. If the charging conditions are met, the monitoring unit controls the third switch to be turned on.

[0015] In some embodiments of the present application, the monitoring unit is further configured to detect charging parameters of an external device on the charging port, and adjust output parameters of the power supply according to the charging parameters.

[0016] In some embodiments of the present application, the monitoring unit includes a temperature detection element, which is used to detect the temperature of the positive electrode and / or the negative electrode of the charging port.

[0017] In some embodiments of the present application, the monitoring unit further includes a connection status detection module, and the connection status detection module is used to detect the connection status of the charging port.

[0018] In a second aspect, the present application also provides a mobile emergency energy storage device, including the above-mentioned power replenishment circuit.

[0019] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned power-replenishing circuit and mobile emergency energy storage system, the power-replenishing circuit includes at least two power-replenishing units and a first switch; the power-replenishing unit includes a power supply and a charging port, and the power supply is used to recharge external devices through the charging port; wherein, the at least two power-replenishing units include a first power-replenishing unit and a second power-replenishing unit; the first switch is arranged between two adjacent power-replenishing units, and one end of the first switch is connected between the charging port of the first power-replenishing unit and the power supply, and the other end of the first switch is connected between the charging port of the second power-replenishing unit and the power supply; the power-replenishing unit comprises a first power-replenishing unit and a second power-replenishing unit; the first switch is arranged between two adjacent power-replenishing units, and one end of the first switch is connected between the charging port of the first power-replenishing unit and the power supply, and the other end of the first switch is connected between the charging port of the second power-replenishing unit and the power supply; The circuit has a first charging state and a second charging state. When the charging circuit is in the first charging state, the first switch is turned on to output the power supply of the second charging unit to the charging port of the first charging unit. When the charging circuit is in the second charging state, the second switch is turned on to isolate the first and second charging units. In other words, according to actual needs, the two charging units can be selected to charge different external devices through their respective charging ports, or the two charging units can be selected to charge the same external device through the charging port of one of them, which is beneficial to improving the power supply flexibility of the charging circuit and the mobile emergency energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the framework structure of a power supply circuit provided in one embodiment of the present application;

[0021] Figure 2 A schematic diagram of the framework structure of a power supply circuit provided in another embodiment of the present application;

[0022] Figure 3 A schematic diagram of the circuit structure of a power replenishment circuit provided in one embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the framework structure of a power compensation circuit provided in yet another embodiment of the present application.

[0024] Specific element symbol description: 100 - external device, 200 - power supply unit, 210 - first power supply unit, 211 - charging port, 212 - power supply, 220 - second power supply unit, 300 - first switch element. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "up", "down", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0029] It's important to note that with the rapid development of the electric vehicle industry, the penetration rate of electric vehicles has increased year by year, particularly in urban public transportation, logistics, and private vehicles. However, electric vehicle range and charging efficiency have always been key factors restricting their widespread adoption. The need for rapid recharging of electric vehicles is particularly urgent during emergency rescues, emergencies, and long-distance travel.

[0030] Most existing charging vehicle systems use a limited number of charging gun outputs, usually equipped with only two charging guns, which can simultaneously meet the charging needs of two small electric vehicles or one large electric bus (two guns per vehicle). This design can meet basic needs in most cases, but in specific scenarios, such as large-scale events, emergency rescue after natural disasters, or concentrated parking areas for electric vehicles, the number of vehicles that need to be charged at the same time may far exceed the carrying capacity of the existing system, causing vehicles to queue and wait, seriously affecting rescue efficiency and user experience. In addition, there is room for optimization in the energy utilization of the existing charging vehicle system. When only charging a single large electric bus, if the system only activates one battery cluster, the other battery cluster may be idle, failing to fully utilize the overall energy utilization efficiency of the mobile energy storage vehicle.

[0031] Therefore, based on this, the present application improves the relevant power supply circuit and mobile emergency energy storage system.

[0032] See also Figure 1 , Figure 1The schematic diagram of the framework structure of the power-replenishing circuit provided in this embodiment is shown. The power-replenishing circuit of this embodiment includes at least two power-replenishing units 200 and a first switch 300; the power-replenishing unit 200 includes a power supply 212 and a charging port 211, and the power supply 212 is used to recharge the external device 100 through the charging port 211; wherein, the at least two power-replenishing units 200 include a first power-replenishing unit 210 and a second power-replenishing unit 220; the first switch 300 is arranged between two adjacent power-replenishing units 200, and one end of the first switch 300 is connected between the charging port 211 of the first power-replenishing unit 210 and the power supply 212. 2, the other end of the first switch element 300 is connected between the charging port 211 of the second power-compensating unit 220 and the power supply 212; the power-compensating circuit has a first power-compensating state and a second power-compensating state. When the power-compensating circuit is in the first power-compensating state, the first switch element 300 is turned on to output the power supply 212 of the second power-compensating unit 220 to the charging port 211 of the first power-compensating unit 210; when the power-compensating circuit is in the second power-compensating state, the first switch element 300 is turned on to isolate the first power-compensating unit 210 from the second power-compensating unit 220.

[0033] It should be noted that each power supply unit 200 includes a power supply 212 and a charging port 211. The power supply is responsible for providing power, while the charging port 211 is used to connect to the external device 100 and transmit power to the external device 100. In other words, at least two power supply units 200 can independently power the external device 100.

[0034] It will be appreciated that when the power supply circuit is in the first power supply state, the first switch 300 is in the on state. This means that the power supply 212 of the second power supply unit 220 can be output to the charging port 211 of the first power supply unit 210 through the first switch 300. This design allows the power supply of one power supply unit 200 to be used to power the charging port 211 of another power supply unit 200 in specific situations, thereby increasing the flexibility and efficiency of power supply. For example, when the power supply 212 of the first power supply unit 210 is insufficient or requires maintenance, the power of the second power supply unit 220 can be temporarily borrowed to accelerate or continue powering the external device 100. When the power supply circuit is in the second power supply state, the first switch 300 is disconnected, thereby isolating the first power supply unit 210 from the second power supply unit 220. This allows each power supply unit 200 to operate independently without interfering with each other. For example, when two charging units 200 are connected to external devices 100, the charging circuit is adjusted to the second charging state. When one external device 100 is fully charged, the power of the external device 100 can be used to charge the other external device 100, thereby improving charging efficiency.

[0035] Current charging devices often only have a single charging unit 200. Even when two charging units 200 are provided, they operate independently and cannot coordinate with each other. However, the present invention allows for the use of two charging units 200, each charging different external devices 100 through its own charging port 211, or for two charging units 200 to charge the same external device 100 through one of their charging ports 211, improving the power supply flexibility of the charging circuit and the mobile emergency energy storage system.

[0036] In some embodiments of this application, please refer to Figure 2 , Figure 2 A schematic diagram of the structure of the power-replenishing circuit provided in this embodiment is shown. Each power-replenishing unit 200 in this embodiment has at least two charging ports 211, with a second switch disposed between the two charging ports 211. The power-replenishing unit 200 has a third power-replenishing state and a fourth power-replenishing state. In the third power-replenishing state, the second switch is closed, allowing the power-replenishing unit 200 to recharge the same external device 100 through both charging ports 211. In the fourth power-replenishing state, the second switch is open, isolating the two charging ports 211.

[0037] It should be noted that each power supply unit 200 is equipped with at least two charging ports 211, which can transmit power to the external device 100 simultaneously or separately. This design increases the flexibility and applicability of the power supply unit 200, enabling it to simultaneously meet the power supply needs of multiple external devices 100 or provide higher-power power to the same external device 100 through two ports. A second switch is located between the two charging ports 211 to control the electrical connection between them. By controlling the opening or closing of the second switch, the operating mode of the power supply unit 200 can be flexibly adjusted.

[0038] It will be appreciated that when the power supply unit 200 is in the third power supply state, the second switch element is closed, creating an electrical path between the two charging ports 211. This allows the power supply unit 200 to simultaneously power the same external device 100 through both ports. This parallel power supply method can provide greater current or power, thereby accelerating charging speeds and is particularly suitable for scenarios with high charging time requirements. When the power supply unit 200 is in the fourth power supply state, the second switch element is disconnected, thereby isolating the two charging ports 211. This design allows the two ports of the power supply unit 200 to operate independently, providing power to different external devices 100, or allowing one port to malfunction without affecting the normal operation of the other port. Furthermore, the disconnected state helps improve system safety and stability by preventing unexpected situations caused by faults such as short circuits.

[0039] For example, in an electric vehicle charging station, each charging pile can be considered a charging unit 200, equipped with two charging ports 211 to meet the charging needs of different vehicle models. When charging an electric vehicle that supports dual-charger fast charging, the two ports can be used in parallel to improve charging efficiency. When charging an electric vehicle that only needs to charge a single-charger, one port can be disabled, leaving only one charging port. Furthermore, in data centers, hospitals, and other locations requiring high reliability and stability, this type of charging unit 200 can be used to ensure uninterrupted power supply to critical equipment.

[0040] In some embodiments of this application, please refer to Figure 3 , Figure 3 FIG. 1 shows a schematic diagram of the circuit structure of the power replenishment circuit provided in this embodiment; Figure 3 The monitoring system and HMI correspond to the detection unit, 6 (6') and 7 (7') correspond to the charging port 211, 4 (4') corresponds to the second switch, 17 corresponds to the first switch 300, and 12 (12') corresponds to the power supply 212. The charging circuit also includes a detection unit, which is used to detect the charging level of each external device 100. When the external device 100 is fully charged, the first switch 300 is closed to call the first power supply 212 to power the other charging units 200; the first power supply 212 is the power supply 212 in the charging unit 200 corresponding to the fully charged external device 100.

[0041] It should be explained that the detection unit is responsible for real-time monitoring of the charge level of each external device 100. This is usually achieved by communicating with the battery management system (BMS) of each external device 100 to obtain real-time battery power, charging status and other information.

[0042] During the charging process, each charging unit 200 provides power to the external device 100 as needed. Simultaneously, the detection unit continuously monitors the charging status of each external device 100. Once an external device 100 is fully charged, the detection unit immediately recognizes this status and triggers the appropriate response mechanism. When the external device 100 is fully charged, the charging circuit closes the first switch 300. This activates the power supply 212 (i.e., the first power supply 212) in the charging unit 200 corresponding to the fully charged external device 100 as a backup or auxiliary power source to power other charging units 200 that are charging or in need of power. In this way, the charging circuit can efficiently utilize the power supply 212 corresponding to the fully charged external device 100 without interrupting the charging of other devices. This not only improves energy efficiency but also reduces reliance on other independent power sources or the power grid.

[0043] In some embodiments of this application, please continue to refer to Figure 3In this embodiment, when an external device 100 corresponding to the power supplement unit 200 is fully charged, the second switch is closed to connect the two charging ports 211 in the power supplement unit 200 in parallel.

[0044] It's important to explain that after the external device 100 is fully charged, the closing of the second switch connects the two charging ports 211 of the power supply unit 200, forming a parallel circuit. This means the two ports now function as a single unit, sharing current and voltage. This parallel connection allows the power supply unit 200 to more flexibly respond to varying charging needs. For example, if one port is charging a low-power device while the other is idle, the parallel connection allows the combined power of both ports to be allocated to the device being charged, accelerating charging.

[0045] In some embodiments of this application, please continue to refer to Figure 3 , Figure 3 3 (3') and 4 (4') correspond to the third switch element. In this embodiment, a third switch element is provided between each charging port 211 and the corresponding first switch element 300. The third switch element is used to disconnect the external device 100 connected to the corresponding charging port 211 when the external device 100 is fully charged.

[0046] It's important to note that a third switch is located between each charging port 211 and the corresponding first switch 300. When the external device 100 connected to the corresponding charging port 211 is fully charged, the third switch disconnects, severing power flow between that port and the external device 100. This not only promptly disconnects the fully charged external device 100 from the charging port 211, preventing battery damage from overcharging, but also facilitates parallel connection of two charging ports 211.

[0047] In some embodiments of this application, please refer to Figure 3 , Figure 3 The monitoring system and HMI correspond to the monitoring unit. The power replenishment circuit of this embodiment also includes a monitoring unit, which is used to detect whether the external device 100 on the charging port 211 meets the charging conditions. When the charging conditions are met, the monitoring unit controls the third switch to be turned on.

[0048] It should be noted that the monitoring unit is responsible for detecting whether the external device 100 connected to the charging port 211 meets charging conditions. These conditions may include the device's battery level being below a certain threshold, the device supporting the current charging protocol, and the device interface being compatible with the charging port 211. If the charging conditions are met, the monitoring unit sends a control signal to the third switch element, causing it to transition from an off state to an on state. This allows current to flow through the charging port 211 to the external device 100, initiating the charging process.

[0049] In some embodiments of this application, please continue to refer to Figure 3 Also see Figure 4 , Figure 4 Schematic diagram of the framework structure of the power replenishment circuit provided in this embodiment is shown. The monitoring unit of this embodiment is also used to detect the charging parameters of the external device 100 on the charging port 211 and adjust the output parameters of the power supply 212 according to the charging parameters.

[0050] In some embodiments of this application, please continue to refer to Figure 3 and Figure 4 The monitoring unit includes a temperature detection element, which is used to detect the temperature of the positive electrode and / or negative electrode of the charging port 211.

[0051] In some embodiments of this application, please continue to refer to Figure 3 and Figure 4 The monitoring unit further includes a connection status detection module, which is used to detect the connection status of the charging port 211.

[0052] Example 1, please refer to Figure 3The power supply unit 200 includes a first power supply unit 210 and a second power supply unit 220. The first power supply unit 210 has a first charging gun 6 and a second charging gun 7, and the second power supply unit 220 has a third charging gun 6' and a fourth charging gun 7'. The first, second, third, and fourth charging guns are all charging ports 211. In this embodiment, the charging unit 200 is applied to the charging vehicle. The charging vehicle of this embodiment can perform charging rescue operations for four small electric vehicles at the same time. After the monitoring system receives the "mode one charging" instruction, it disconnects the contactors 4 and 1 (4', 1'), and attracts the DC contactor 2 (2') to use the power supply 212 to power the charging modules 10 and 11 (10', 11'). After the monitoring system 14 (14') detects that the charging conditions are met, it attracts the contactors 3 and 5 (3', 5') and simultaneously charges the four small electric vehicles through the charging guns 6 and 7 (6', 7'); the monitoring system 14 (14') communicates with the vehicle's BMS through the CAN bus to obtain the status information of the vehicle battery and adjusts the output voltage and current of the charging modules 10 (10') and 11 (11') according to the received charging demand voltage and current, until the SOC reaches 100% and the charging operation is stopped. During this period, when one vehicle is fully charged first, the monitoring system will disconnect the contactor 3 (3') or 5 (5'), and attract the combined contactor 4, and use two sets of charger modules 10 (10') and 11 (11') in parallel to provide high power to the electric vehicle that has not yet been fully charged, thereby increasing the charging speed.

[0053] Please continue reading Figure 4 Each subsystem of the charging vehicle can independently provide charging support for two small passenger vehicles (one vehicle, one charging gun). The main monitoring unit 45 communicates with the BMS of the two vehicles to be charged via its 1# CAN interface 52 and 2# CAN interface 53, respectively, to obtain the required charging voltage and current of the vehicles in real time. It also uses protocol converters 40 and 42 to regulate the voltage and current of the two charging modules. The 1# connection detection unit 33 and 2# connection detection unit 35 also monitor the connection status of the two charging guns in real time to determine if there is an abnormality. The positive and negative pole temperatures of the charging guns are measured to determine if there is an overtemperature fault. The 1# DC acquisition and metering unit and the 2# DC acquisition and metering unit 32 and 34 collect the output voltage and current of the two charging modules in real time, monitor their output status, and record the discharged power. The insulation detection unit 36 ​​monitors the insulation condition of the system in real time.

[0054] Example 2: Please continue to see Figure 3The charging unit 200 includes a first charging unit 210 and a second charging unit 220. The first charging unit 210 has a first charging gun 6 and a second charging gun 7, and the second charging unit 220 has a third charging gun 6' and a fourth charging gun 7'. The first charging gun, the second charging gun, the third charging gun and the fourth charging gun are all charging ports 211. In this embodiment, the charging unit 200 is applied to a charging vehicle. This embodiment can simultaneously perform charging operations on two medium-capacity electric minibuses. For a single vehicle with a single gun, whichever charging gun 6 (6') or 7 (7') is used, 3 (3') or 5 (5') is energized and the parallel contactor 4 (4') is energized at the same time; for a single vehicle with two guns, contactors 3, 4, 5 (3', 4', 5') are energized at the same time. The entire charging process refers to Example 1.

[0055] Please continue reading Figure 4 Each subsystem of the charging vehicle can provide a rescue charge to a medium-sized passenger vehicle (one vehicle with two charging modules) by connecting two charging modules in parallel. The main monitoring unit 45 communicates with the vehicle's BMS via its 1#CAN interface 52 or 2#CAN interface 53, obtaining the vehicle's charging voltage and current requirements in real time. It then broadcasts commands via protocol converters 40 and 42 to simultaneously regulate voltage and current for both charging modules. The 1# and 2# connection detection units 33 and 35 also monitor the connection status of the two charging modules in real time to determine if there are any abnormalities, and obtain the positive and negative terminal temperatures to determine if there are any overtemperature faults. The 1# and 2# DC acquisition and metering units 32 and 34 collect the output voltage and current of the two charging modules in real time, monitor their output status, and record the amount of discharged electricity. The insulation detection unit 36 ​​monitors the insulation condition of the system in real time.

[0056] Example 3: Please continue to see Figure 3The power supply unit 200 includes a first power supply unit 210 and a second power supply unit 220. The first power supply unit 210 has a first charging gun 6 and a second charging gun 7, and the second power supply unit 220 has a third charging gun 6' and a fourth charging gun 7'. The first, second, third, and fourth charging guns are all charging ports 211. In this embodiment, the charging unit 200 is applied to the charging vehicle. This embodiment is suitable for fast charging of a large-capacity electric bus. When charging guns 6 and 7 are used for charging, the output contactors 3, 4, 5, 17, and 4' are energized, 3' and 4' are disconnected, and the DC isolation contactor 2 (2') is energized. At this time, the two battery cluster subsystems charge the electric bus through the charging guns 6 and 7 at the same time, thereby improving the charging speed. When charging guns 6' and 7' are used for charging, the output contactors 3', 4', 5', 17, and 4 are energized, 3 and 4 are disconnected, and the DC isolation contactor 2 (2') is energized. At this time, the two battery cluster subsystems charge the electric bus through the charging guns 6' and 7' at the same time, thereby improving the charging speed.

[0057] Please continue reading Figure 4 The charging vehicle connects two subsystems in parallel and enables the main monitoring units 45 of the two to work together, so that the vehicle's reserved energy can simultaneously supply power to a bus, thereby maximizing the efficiency of charging and rescue. In this mode, the main monitoring unit of any subsystem can randomly take priority as the master, and the other main monitoring unit automatically switches to slave mode, that is, the operator can operate the human-machine interface of any subsystem to realize the parallel charging function of the whole vehicle. The main monitoring unit 45 acting as the master will send a message to the other main monitoring unit to notify the other party to monopolize the system control right. After receiving the message, the other party will give up the system control right and display its working status as slave status on the interface, and give up the 485 bus 41 that controls the charging module to be controlled by the master. At this time, all charging modules are controlled by the master, and the slave is responsible for other control logics.

[0058] Furthermore, in order to better implement the power compensation circuit in any of the above embodiments, based on the above power compensation circuit, the present application also provides a mobile emergency energy storage device, including the above power compensation circuit.

[0059] In some embodiments, the mobile emergency energy storage device is a charging vehicle. Using multiple charging output terminals, it can simultaneously provide charging and rescue services to multiple passenger vehicles, or it can concentrate all energy resources to provide charging and rescue services to a single large-capacity electric device, greatly improving the efficiency of charging and rescue services. In the above embodiments, the descriptions of each embodiment have their own specific focus. For details not detailed in one embodiment, please refer to the relevant descriptions of other embodiments.

[0060] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0061] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0062] Similarly, it should be noted that, in order to simplify the description of the present disclosure and thus facilitate understanding of one or more utility model embodiments, the foregoing description of the present embodiment sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of the present application requires more features than those recited in the claims. In fact, the features of an embodiment may be fewer than the total features of a single embodiment disclosed above.

[0063] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A power supply circuit, characterized in that: include: At least two power replenishment units, each comprising a power supply and a charging port, wherein the power supply is used to replenish power for an external device through the charging port; wherein the at least two power replenishment units include a first power replenishment unit and a second power replenishment unit; a first switch element, disposed between two adjacent power supply units, with one end of the first switch element connected between the charging port of the first power supply unit and the power supply, and the other end of the first switch element connected between the charging port of the second power supply unit and the power supply; The power-compensating circuit has a first power-compensating state and a second power-compensating state. When the power-compensating circuit is in the first power-compensating state, the first switch is turned on to output the power supply of the second power-compensating unit to the charging port of the first power-compensating unit. When the power-compensating circuit is in the second power-compensating state, the first switch is turned on to isolate the first power-compensating unit from the second power-compensating unit.

2. The power supply circuit according to claim 1, characterized in that: Each of the power replenishing units has at least two charging ports, and a second switch is provided between the two charging ports. The power replenishing unit has a third power replenishing state and a fourth power replenishing state. When the power replenishing unit is in the third power replenishing state, the second switch is closed to replenish power for the same external device through the two charging ports. When the power replenishing unit is in the fourth power replenishing state, the second switch is opened to isolate the two charging ports.

3. The power supply circuit according to claim 2, wherein: The power replenishment circuit further includes a detection unit configured to detect a charge level of each of the external devices. When the external device is fully charged, the first switch is closed to call upon a first power supply to supply power to other power replenishment units. The first power supply is the power supply in the power replenishment unit corresponding to the fully charged external device.

4. The power supply circuit according to claim 3, characterized in that: When one of the external devices corresponding to the power supplement unit is fully charged, the second switch is closed to connect the two charging ports in the power supplement unit in parallel.

5. The power supply circuit according to claim 3 or 4, characterized in that: A third switch element is provided between each charging port and the corresponding first switch element, and the third switch element is used to disconnect when the external device connected to the corresponding charging port is fully charged.

6. The power supply circuit according to claim 5, characterized in that: The power replenishment circuit further includes a monitoring unit, which is configured to detect whether the external device connected to the charging port meets a charging condition. If the charging condition is met, the monitoring unit controls the third switch to be turned on.

7. The power supply circuit according to claim 6, characterized in that: The monitoring unit is further configured to detect charging parameters of an external device on the charging port and adjust output parameters of the power supply according to the charging parameters.

8. The power supply circuit according to claim 6, characterized in that: The monitoring unit includes a temperature detection element, which is used to detect the temperature of the positive electrode and / or the negative electrode of the charging port.

9. The power supply circuit according to claim 6, characterized in that: The monitoring unit further includes a connection status detection module, and the connection status detection module is used to detect the connection status of the charging port.

10. A mobile emergency energy storage system, characterized in that: The power compensation circuit includes any one of claims 1 to 9.

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