Mobile charging device and charging circuit thereof

Abstract

The utility model discloses a mobile charging device and a charging circuit thereof. The circuit comprises a power supply module, a voltage conversion module and a control module. The voltage conversion module is electrically connected with the power supply module and a to-be-charged load. The control module is electrically connected with the voltage conversion module; the control module is also in communication connection with the to-be-charged load, and the control module is used for obtaining the charging voltage and the charging power sent by the to-be-charged load, and controlling the voltage conversion module to carry out voltage conversion processing on the power supply voltage output by the power supply module, so that the voltage conversion module charges the to-be-charged load. By means of the circuit, the problems that an existing charging pile cannot move and a load to be charged can only be charged by being externally connected with a power supply are solved, the charging circuit which is movable and separated from a power grid is provided, rapid charging of a new energy automobile is achieved, use is convenient, and the experience feeling of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile charging devices, in particular to a mobile charging device and a charging circuit thereof. Background Art

[0002] With the development of new energy electric vehicles, charging of new energy electric vehicles has become a concern for many car owners.

[0003] Traditional charging piles generally use 220V AC and 380V AC power supply; however, charging piles powered by 220V AC and 380V AC power can only be used in fixed locations and cannot be moved. When the car battery needs to be charged, it can only find a charging pile at a specific location for charging, and the search process will take too much time, causing unnecessary power consumption; in addition, when using a 220V AC powered charging pile to charge the car battery, the charging power is small and the charging time is long; when using a 380V AC powered charging pile to charge the car battery, the charging power is large and the charging time is short, but the load on the power grid is large, and usually an external power supply is required, which is inconvenient to use. Utility Model Content

[0004] The utility model provides a mobile charging device and a charging circuit thereof to solve the defects of the prior art, and proposes a movable charging circuit which can quickly charge a load to be charged without being connected to a power grid and is easy to use.

[0005] In a first aspect, the utility model provides a charging circuit for a mobile charging device, comprising: a power supply module, a voltage conversion module and a control module;

[0006] The voltage conversion module is electrically connected to the power supply module and the load to be charged respectively;

[0007] The control module is electrically connected to the voltage conversion module;

[0008] The control module is also connected to the load to be charged for communication. The control module is used to receive the charging voltage and charging power sent by the load to be charged, and control the voltage conversion module to perform voltage conversion processing on the supply voltage output by the power supply module so that the voltage conversion module can charge the load to be charged.

[0009] Optionally, the power supply module includes: a power supply body and a power management unit;

[0010] The power source body is provided with at least one battery module;

[0011] The power management unit is electrically connected to the power source body, and is used to collect operating parameters of the battery module and to control and manage the battery module.

[0012] Optionally, the charging circuit of the mobile charging device further includes: a charging unit;

[0013] The power replenishment unit is electrically connected to the power management unit, and the power replenishment unit is also connected to an external power source. The power management unit is used to obtain the charging demand of the power source body when the power replenishment unit is connected to the external power source, and control the power replenishment unit to charge the power source body.

[0014] Optionally, the power management unit includes a main management unit and at least one balancing unit;

[0015] The balancing unit is connected to the battery module one by one, and is also connected to the main management unit. The balancing unit is used to collect the single cell parameters of the single cell in the battery module, send the single cell parameters to the main management unit, and balance the battery module;

[0016] The main management unit is also connected to the voltage conversion module, and is used to provide voltage to the voltage conversion module.

[0017] Optionally, the voltage conversion module includes a first voltage conversion unit and a second voltage conversion unit;

[0018] The input end of the first voltage conversion unit is electrically connected to the first output end of the main management unit, the output end of the first voltage conversion unit is electrically connected to the control module, and the first voltage conversion unit is used to convert the supply voltage into a first working voltage to supply power to the control module;

[0019] The input end of the second voltage conversion unit is electrically connected to the second output end of the main management unit, the output end of the second voltage conversion unit is electrically connected to the load to be charged, and the second voltage conversion unit is used to convert the supply voltage into a second working voltage to charge the load to be charged.

[0020] Optionally, the charging circuit of the mobile charging device further includes: a current detection unit;

[0021] The input end of the current detection unit is electrically connected to the voltage conversion module, and the output end of the current detection unit is electrically connected to the control module and the load to be charged respectively. The current detection unit is used to detect the current value output by the voltage conversion module and send the current value to the control module;

[0022] The control module is also used to determine whether the charging circuit works normally according to the current value.

[0023] Optionally, the charging circuit of the mobile charging device further includes: a power monitoring unit;

[0024] The input end of the power monitoring unit is electrically connected to the current detection unit, and the output end of the power monitoring unit is electrically connected to the control module and the load to be charged respectively. The power monitoring unit is used to measure the current value output by the current detection unit and send the measurement result to the control module.

[0025] In a second aspect, the utility model provides a mobile charging device, comprising: a charging gun and the above-mentioned charging circuit;

[0026] The first end of the charging gun is pluggably connected to the load to be charged, and the second end of the charging gun is electrically connected to the power output end of the charging circuit;

[0027] The charging circuit is also connected to the load to be charged through the charging gun.

[0028] Optionally, the charging gun includes at least an insulation detection unit, a communication interaction unit, a signal transmission unit and a temperature detection unit;

[0029] The insulation detection unit is electrically connected to the control module of the charging circuit and is used to perform insulation detection between the charging gun and the load to be charged;

[0030] The communication interaction unit is connected to the control module and the load to be charged, respectively, and is used to receive the charging voltage and charging power of the load to be charged, and transmit the charging voltage and charging power to the control module;

[0031] The signal transmission unit is connected to the control module and is used to send a signal indicating that the connection between the charging gun and the load to be charged is completed to the control module;

[0032] The temperature detection unit is electrically connected to the insulation detection unit and the control module respectively, and is used to detect the temperature value of the insulation detection unit and send the temperature value to the control module.

[0033] Optionally, the mobile charging device further includes: a charging protection unit;

[0034] The charging protection unit is electrically connected to the control module and the charging gun respectively, and is used to detect the connection status between the charging gun and the load to be charged, receive the locking signal sent by the control module, and electromagnetically connect the load to be charged and the charging gun according to the locking signal.

[0035] The technical solution of the utility model is to set up a charging circuit with an independent power supply module. The power supply module is electrically connected to the load to be charged via the voltage conversion module. The control module can identify the charging voltage and charging power required for charging the load to be charged, and output a driving signal to the voltage conversion module based on the charging voltage and charging power of the load to be charged, and control the voltage conversion module to output the corresponding charging voltage and charging power to the load to be charged, so as to quickly charge the load to be charged. Through the above circuit, the problem that the existing charging pile cannot be moved and needs an external power supply to charge the load to be charged is solved. A movable charging circuit is proposed, which can quickly charge the load to be charged without being connected to the power grid, avoiding the impact of the charging device connected to the power grid on the power grid load. It is easy to use and improves the user experience.

[0036] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic diagram of a charging circuit for a mobile charging device provided in an embodiment of the utility model;

[0039] Figure 2 A schematic diagram of another charging circuit for a mobile charging device provided by an embodiment of the utility model;

[0040] Figure 3 A structural schematic diagram of another charging circuit for a mobile charging device provided by the utility model;

[0041] Figure 4 A schematic diagram of the structure of another charging circuit for a mobile charging device provided by the utility model;

[0042] Figure 5 A structural schematic diagram of a charging circuit for a mobile charging device provided by the utility model;

[0043] Figure 6 A schematic diagram of another charging circuit for a mobile charging device provided by the utility model;

[0044] Figure 7 A schematic diagram of the structure of a mobile charging device provided by the utility model;

[0045] Figure 8 A schematic diagram of the structure of a charging gun provided by the utility model;

[0046] Fig. 9 This is a structural schematic diagram of another mobile charging device provided by the utility model. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] In one embodiment, Figure 1 A schematic diagram of a charging circuit for a mobile charging device provided by an embodiment of the utility model is shown in FIG. Figure 1 As shown, the charging circuit includes: a power supply module 1, a voltage conversion module 2 and a control module 3; the voltage conversion module 2 is electrically connected to the power supply module 1 and the load 4 to be charged respectively; the control module 3 is electrically connected to the voltage conversion module 2; the control module 3 is also connected to the load 4 to be charged in communication, and the control module 3 is used to obtain the charging voltage and charging power of the load 4 to be charged, and control the voltage conversion module 2 to perform voltage conversion processing on the power supply voltage output by the power supply module 1, so that the voltage conversion module 2 charges the load 4 to be charged. In this embodiment, the load to be charged can be a car battery.

[0050] Among them, the power supply module 1 is mainly used to convert other forms of energy into electrical energy, so as to provide a power supply voltage for the charging circuit. In this embodiment, the power supply module 1 can be a DC power supply, that is, the power supply voltage output by the power supply module 1 is a DC voltage. In some embodiments, the power supply module 1 at least includes a power supply body, typically, the power supply body includes but is not limited to: a fuel cell, a lead-acid battery, a lithium battery or other types of battery modules.

[0051] The voltage conversion module 2 of the present application is used to convert a DC supply voltage into a DC output voltage. Typically, the voltage conversion module 2 is a DC-DC converter. In this embodiment, the voltage conversion module 2 converts the supply voltage into a DC output voltage having at least one voltage level according to the drive signal of the control module 3, and the DC output voltage is at least used to quickly charge the load 4 to be charged. In some embodiments, the output voltage of the voltage conversion module 2 is also used to power other electrical components inside the control module 3 or other charging circuits.

[0052] The control module 3 of the present application has at least functional modules corresponding to voltage conversion control (for example, DC-DC control) and communication interaction (for example, CAN communication). The control module 3 is connected to the load 4 to be charged based on the communication interaction module, receives and analyzes the charging request issued by the load 4 to be charged, so as to obtain the charging voltage and charging power of the load 4 to be charged. After obtaining the charging voltage and charging power, the control module 3 outputs a corresponding driving signal according to the charging voltage and charging power. The voltage conversion module 2 receives the driving signal output by the control module 3, performs voltage conversion processing on the power supply voltage, and charges the load 4 to be charged.

[0053] Specifically, taking the load 4 to be charged as a car battery as an example, when the load 4 to be charged (e.g., a car battery) needs to be charged, the charging circuit is connected to the load 4 to be charged (e.g., a car battery), specifically, the DC output side of the voltage conversion module 2 is electrically connected to the load 4 to be charged (e.g., a car battery), and the communication interface (e.g., a CAN interface) of the control module 3 is communicatively connected to the communication interface (e.g., a CAN interface) of the load 4 to be charged. After the connection is completed, the control module 3 communicates with the load 4 to be charged (e.g., a car battery) through the CAN interface, and the load 4 to be charged (e.g., a car battery) sends a charging request to the control module 3, providing a charging voltage and a charging power. After the control module 3 obtains the charging voltage and charging power of the load 4 to be charged, it adjusts the duty cycle of the driving signal according to the charging voltage and charging power of the load 4 to be charged, and controls the voltage conversion module 2 to perform voltage conversion processing, so as to convert the power supply voltage provided by the power supply module 1 into the charging voltage and charging power required for charging the load 4 to be charged. The charging voltage and charging power output by the voltage conversion module 2 can be input to the load 4 to be charged. The charging power of this embodiment can reach tens of kilowatts, so that the load 4 to be charged can be charged quickly.

[0054] It should be noted that the present application can configure a preset upper limit value of charging power that the charging circuit can output based on the capacity calibration of the power supply module 1, and the preset upper limit value of charging power is the maximum charging power that the charging circuit can provide to the load 4 to be charged. Exemplarily, the preset upper limit value of charging power is defined as 80kW. If the charging power of the load 4 to be charged is greater than the preset upper limit value of charging power of the power supply module 1, the control module 3 controls the voltage conversion module 2 to charge the load 4 to be charged according to the preset upper limit value of charging power.

[0055] The technical solution of the embodiment of the utility model is to set up a charging circuit with an independent power supply module, the power supply module is electrically connected to the load to be charged through the voltage conversion module, the control module can identify the charging voltage and charging power required for charging the load to be charged, and output a driving signal to the voltage conversion module based on the charging voltage and charging power of the load to be charged, and control the voltage conversion module to output the corresponding charging voltage and charging power to the load to be charged, so as to quickly charge the load to be charged. Through the above circuit, the problem that the existing charging pile cannot be moved and needs an external power supply to charge the load to be charged is solved, and a movable charging circuit is proposed, which can quickly charge the load to be charged without being connected to the power grid, avoiding the impact of the charging device connected to the power grid on the power grid load, and is easy to use, which improves the user experience.

[0056] Optional, Figure 2 A schematic diagram of another charging circuit for a mobile charging device provided by the utility model is shown as follows: Figure 2 As shown, the power supply module 1 includes: a power supply body 11 and a power management unit 12; the power supply body 11 is provided with at least one battery module 111; the power management unit 12 is electrically connected to the power supply body 11, and the power management unit 12 is used to collect operating parameters of the battery module 111 and control and manage the battery module 111.

[0057] Optional, continue to refer to Figure 2 As shown, the power management unit 12 includes a main management unit 121 and at least one balancing unit 122; the balancing unit 122 is connected to the battery module 111 in a one-to-one correspondence, and the balancing unit 122 is also connected to the main management unit 121. The balancing unit 122 is used to collect the single cell parameters of the single cell in the battery module 111, and send the single cell parameters to the main management unit 121, and perform balancing control on the battery module 111; the main management unit 121 is also connected to the voltage conversion module 2, and the main management unit 121 is used to provide a power supply voltage to the voltage conversion module 2.

[0058] The power source body 11 is a DC power source formed by two or more battery modules 111 connected in series or in parallel. In this embodiment, two or more battery modules 111 are connected in parallel to form the power source body 11; the battery module 111 may be composed of multiple single cells.

[0059] The power management unit 12 of the present application adopts a master-slave management structure, wherein the master management unit 121 is the master management unit, and the balancing unit 122 is the slave management unit. The balancing unit 122 is used to monitor and manage the single chip in the battery module 111 to achieve the balance of power and voltage in a single battery module 111; the master management unit 121 is used to collect the operating parameters (such as temperature, power and voltage) of each battery module 111, and determine whether the battery module 111 is working normally according to the collected operating parameters. At the same time, each battery module 111 can also be controlled and managed to achieve the balance of power of each battery module 111 in the power source body 11. The master management unit 121 is also used to monitor the single parameter in the battery module 111, and provide the power supply voltage to the voltage conversion module 2 when the single parameter is within the normal range.

[0060] Specifically, when the battery module 111 is produced, the production process and other reasons may cause certain differences in the capacity and performance of each single cell. During the charge and discharge process of the battery module 111, overcharging or over-discharging is prone to occur. Therefore, a master-slave management structure can be set through the power management unit 12, and the balancing unit 122 collects the single cell parameters of the single cell in the battery module 111, wherein the single cell parameters may include parameters such as voltage, charge and temperature of the single cell, and sends the collected single cell parameters to the main management unit 121 while collecting the single cell parameters; the main management unit 121 will determine in real time whether the collected single cell parameters (such as charge or voltage) exceed the preset single cell parameter range. If the single cell charge exceeds the preset single cell parameter range, it indicates that If the power of the single cells in the battery module 111 is not balanced, the main management unit 121 will control the balancing unit 122 to balance the power of the single cells in the corresponding battery module 111, that is, transfer the power of the single cells with higher power in the battery module 111 to the single cells with lower power, so as to achieve the power balance of the single battery module 111; if the power of the single cell does not exceed the preset single cell parameter range, it indicates that the power in the single battery module 111 is in a balanced state and no power transfer is required, then the main management unit 121 will control the power supply body 11 to output the supply voltage, and provide the supply voltage to the voltage conversion module 2 connected to the main management unit 121, so that a stable working voltage can be generated in the voltage conversion module 2. In addition, the main management unit 121 can also control and manage each battery module 111, specifically by detecting the module parameters between each battery module 111, so as to achieve the power balance of each battery module 111 in the power supply body 11.

[0061] Optional, Figure 3 A schematic diagram of a charging circuit for a mobile charging device provided by the present invention is shown in FIG. Figure 3 As shown, the charging circuit of the mobile charging device also includes: a charging unit 5; the charging unit 5 is electrically connected to the power management unit 12, and the charging unit 5 is also connected to an external power supply (not shown in the figure). The power management unit 12 is used to obtain the charging demand parameters of the power supply body 11 when the charging unit 5 is connected to the external power supply, and control the charging unit 5 to charge the power supply body 11.

[0062] The power supply unit 5 is connected to the power management unit 12 of the charging circuit. When the power supply unit 5 is connected to an external power source, the power management unit 12 can control the power supply unit 5 to charge the power supply body 11 according to the charging demand of the power supply body 11 .

[0063] Specifically, in the process of charging the load 4 to be charged by the charging circuit, the amount of electricity stored in the power source body 11 will gradually decrease. When the amount of electricity in the power source body 11 decreases to a preset amount of electricity, the power management unit 12 can calculate the charging requirement parameters of the power source body 11, wherein the charging requirement parameters may include but are not limited to any one or a combination of multiple items of the power charging voltage, the power charging current, or the power charging power. Furthermore, the power management unit 12 controls the power supply unit 5 to convert the electric energy provided by the external power source into the corresponding charging requirement parameters, and transmits the converted electric energy to the power source body 11, so as to realize the charging of the power source body 11, thereby ensuring that the amount of electricity in the power source body 11 in the power supply module 1 can be maintained at a high level, and realizing sustainable charging of the load 4 to be charged.

[0064] Optional, Figure 4 A schematic diagram of a charging circuit for a mobile charging device provided by the utility model is shown in FIG. Figure 4 As shown, the voltage conversion module 2 includes a first voltage conversion unit 21 and a second voltage conversion unit 22; the input end of the first voltage conversion unit 21 is electrically connected to the first output end of the main management unit 121, and the output end of the first voltage conversion unit 21 is electrically connected to the control module 3, and the first voltage conversion unit 21 is used to convert the power supply voltage into a first working voltage to power the control module 3; the input end of the second voltage conversion unit 22 is electrically connected to the second output end of the main management unit 121, and the output end of the second voltage conversion unit 22 is electrically connected to the load 4 to be charged, and the second voltage conversion unit 22 is used to convert the power supply voltage into a second working voltage to charge the load 4 to be charged.

[0065] In this embodiment, the first voltage conversion unit 21 and the second voltage conversion unit 22 are both DC-DC converters.

[0066] Specifically, since the working voltages required by the control module 3 and the power supply module 1 are different, the first voltage conversion unit 21 in the voltage conversion module 2 needs to perform voltage conversion processing on the power supply voltage output by the power supply module 1, and convert the power supply voltage into a first working voltage. The converted first working voltage can be used to power the control module 3 to ensure that the control module 3 can operate stably. In this embodiment, the power supply voltage output by the power supply module 1 can be 48V, and the converted first working voltage can be 12V. In addition, the second voltage conversion unit 22 can convert the power supply voltage output by the power supply module 1 into a second working voltage, which is usually the charging voltage of the load 4 to be charged. For example, if the charging voltage in the demand parameter sent by the load 4 to the control module 3 is 569.6V, the second working voltage is 569.6V, and the control module 1 controls the second voltage conversion unit 22 to output 569.6V to the load 4 to be charged, so as to achieve fast charging of the load 4 to be charged.

[0067] Optional, Figure 5 The utility model also provides a structural schematic diagram of a charging circuit for a mobile charging device, such as Figure 5 As shown, the charging circuit of the mobile charging device also includes: a current detection unit 6; the input end of the current detection unit 6 is electrically connected to the voltage conversion module 2, and the output end of the current detection unit 6 is electrically connected to the control module 3 and the load to be charged 4 respectively, and the current detection unit 6 is used to detect the current value output by the voltage conversion module 2 and send the current value to the control module 3; the control module 3 is also used to determine whether the charging circuit is working normally according to the current value.

[0068] Optionally, the current detection unit 6 includes but is not limited to a shunt.

[0069] Specifically, the input end of the current detection unit 6 is electrically connected to the output side of the second voltage conversion unit 22 in the voltage conversion module 2, and can be used to detect the current value output by the second voltage conversion unit 22. Figure 5, the arrow from the second voltage conversion unit 22 to the current detection unit 6 and the arrow between the current detection unit 6 and the load 4 to be charged indicate the current direction, and the arrow from the current detection unit 6 to the control module 3 indicates the current detection signal transmission direction, that is, the current detection unit 6 is connected in series to the charging branch between the second voltage conversion unit 22 and the load 4 to be charged, and after the current detection unit 6 detects the current value output by the second voltage conversion unit 22, it will send the detected current value to the control module 3. After receiving the current value, the control module 3 will determine whether the current value is below the threshold current value according to the received current value. If the control module 3 determines that the current value output by the second voltage conversion unit 22 is below the threshold current value, that is, lower than the threshold current value, it indicates that the charging circuit is in a normal working state, and the second voltage conversion unit 22 is controlled to quickly charge the load 4 to be charged; if the current value is higher than the threshold current value, it indicates that there is an overcurrent phenomenon in the charging circuit, and the control module 3 will control the second voltage conversion unit 22 to stop charging the load 4 to be charged, thereby improving the safety of the charging circuit.

[0070] Optional, Figure 6 A schematic diagram of another charging circuit for a mobile charging device provided by the utility model is shown as follows: Figure 6 As shown, the charging circuit of the mobile charging device also includes: an electric energy monitoring unit 7; the input end of the electric energy monitoring unit 7 is electrically connected to the current detection unit 6, and the output end of the electric energy monitoring unit 7 is electrically connected to the control module 3 and the load to be charged 4 respectively, and the electric energy monitoring unit 7 is used to measure the current value output by the current detection unit 6, and send the measurement result to the control module 3.

[0071] The electric energy monitoring unit 7 is a meter used to measure electric energy; in this embodiment, the electric energy monitoring unit 7 may be an electric energy meter.

[0072] Specifically, in the process of the control module 3 controlling the second voltage conversion unit 22 to quickly charge the load 4 to be charged, the current output by the second voltage conversion unit 7 passes through the current detection unit 6 and then passes through the power monitoring unit 7. After receiving the current value, the power monitoring unit 7 will measure the received current value and send the measurement result to the control module 3 in real time. When the load 4 to be charged is charged, the power monitoring unit 7 will measure the total current consumed by the load 4 to be charged during this charging process. At the same time, the control module 3 will receive the measured total current value and calculate based on the measured total current value. Finally, the cost incurred by the load 4 to be charged during this charging process can be confirmed, so as to notify the user to pay the fee, thereby reducing energy consumption and reducing operating costs.

[0073] Based on the same concept, the utility model also proposes a mobile charging device. Figure 7A schematic diagram of the structure of a mobile charging device provided by the utility model is shown in FIG. Figure 7 As shown, the mobile charging device includes: a charging gun 8 and the above-mentioned charging circuit; the first end of the charging gun 8 is pluggable and connected to the load 4 to be charged, and the second end of the charging gun 8 is electrically connected to the power output end of the charging circuit; the charging circuit is also communicatively connected to the load 4 to be charged through the charging gun 8.

[0074] The charging gun 8 is a medium for connecting the charging circuit and the load 4 to be charged, and can be used to perform power transmission, signal transmission, and communication interaction between the charging circuit and the load 4 to be charged.

[0075] Specifically, the charging gun 8 is pluggably connected to the load 4 to be charged, electrically connected to the power output end of the charging circuit, and the charging circuit is also communicatively connected to the load 4 to be charged through the charging gun 8, so that when the load 4 to be charged sends demand parameters to the control module 3 in the charging circuit, the parameters can be sent through the charging gun 8, and when the control module 3 controls the second voltage conversion unit 22 in the voltage conversion module 2 to quickly charge the load 4 to be charged, the charging gun 8 can be used to achieve fast charging of the load 4 to be charged.

[0076] The mobile charging device proposed in the present invention has corresponding functional modules and beneficial effects of the structure, and the similarities can be referred to the above description.

[0077] Optional, Figure 8 A schematic diagram of the structure of a charging gun provided by the utility model, such as Figure 8 As shown, the charging gun 8 at least includes an insulation detection unit 81, a communication interaction unit 82, a signal transmission unit 83 and a temperature detection unit 84; the insulation detection unit 81 is electrically connected to the control module 3 of the charging circuit, and is used to perform insulation detection between the charging gun 8 and the load 4 to be charged; the communication interaction unit 82 is respectively connected to the control module 3 and the load 4 to be charged, and is used to receive the demand parameters of the load 4 to be charged, and transmit the demand parameters to the control module 3; the signal transmission unit 83 is connected to the control module 3, and is used to send a connection completion signal between the charging gun 8 and the load 4 to be charged to the control module 3; the temperature detection unit 84 is respectively electrically connected to the insulation detection unit 81 and the control module 3, and is used to detect the temperature value of the insulation detection unit 81, and send the temperature value to the control module 3.

[0078] Specifically, after the charging gun 8 is connected to the load 4 to be charged, the control module 3 will perform insulation detection between the charging gun 8 and the load 4 to be charged through the insulation detection unit 81. Specifically, the resistance value of the resistor between the insulation pins can be detected and whether the resistance value exceeds the preset resistance value. If it exceeds the preset resistance value, it indicates that the charging gun 8 and the load 4 to be charged are in an insulation state, and no safety problems will occur, ensuring the safety of new energy vehicles and personnel; if it is less than the preset resistance value, it indicates that there may be current passing between the charging gun 8 and the load 4 to be charged. At this time, the control module 3 will control the voltage conversion module 2 to stop charging the load 4 to avoid safety problems such as fire caused by the charging process, and ensure charging safety. Exemplarily, the preset resistance value is 10kΩ.

[0079] The communication interaction unit 82 is respectively connected to the control module 3 and the load to be charged 4, and is used to receive the demand parameters of the load to be charged 4, such as current, voltage, temperature and other parameters, and transmit the demand parameters to the control module 3. The control module 3 determines whether the demand parameters are within the corresponding preset parameter range. If one of the demand parameters is not within the preset parameter range, the control module 3 will control the voltage conversion module 2 to stop charging the load to be charged 4; if all the demand parameters are within the preset parameter range, indicating that the information interaction between the control module 3 and the load to be charged 4 is normal, the voltage conversion module 2 is controlled to charge the load to be charged 4 normally, thereby effectively and quickly realizing the information interaction between the control module 3 and the load to be charged 4, and ensuring the charging safety of the load to be charged 4.

[0080] The signal transmission unit 83 is connected to the control module 3. When the charging gun 8 is connected to the load 4 to be charged, the connection completion signal is sent to the control module 3 through the signal transmission unit 83, so that the control module 3 controls the voltage conversion module 2 to charge the load 4 to be charged, thereby realizing the signal transmission between the control module 3 and the load 4 to be charged, and ensuring that the load 4 to be charged is quickly charged in time.

[0081] The temperature detection unit 84 is electrically connected to the insulation detection unit 81 and the control module 3 respectively. The temperature detection unit 84 can detect the temperature value of the insulation detection unit 81 and send the temperature value to the control module 3. The control module 3 will judge the received temperature value. If it exceeds the preset temperature value, it indicates that the mobile charging device has an abnormality. The control module 3 will control the voltage conversion module 2 to stop charging the load to be charged 4 to ensure safety during the charging process; if it is lower than the preset temperature value, it indicates that the insulation detection unit 81 is in normal working condition at this time, with low cost, ensuring the safe operation of the insulation detection unit 81.

[0082] Optional, Fig. 9 A structural diagram of another mobile charging device provided by the utility model is shown as follows: Fig. 9As shown, the mobile charging device also includes: a charging protection unit 9; the charging protection unit 9 is electrically connected to the control module 3 and the charging gun 8 respectively, and is used to detect the connection status between the charging gun 8 and the load 4 to be charged, and receive the locking signal sent by the control module 3, and electromagnetically connect the load 4 to be charged and the charging gun 8 according to the locking signal.

[0083] Optionally, the charging protection unit 9 may be an electromagnetic lock.

[0084] Specifically, when the charging gun 8 and the load 4 to be charged are connected, the charging protection unit 9 can detect the connection status of the two, and after the connection between the charging gun 8 and the load 4 to be charged is completed, a connection completion signal will be sent to the control module 3. After receiving the connection completion signal, the control module 3 will send a locking signal to the charging protection unit 9 to lock the charging gun 8 and the load 4 to be charged so that they will not fall out easily. After receiving the locking signal sent by the control module 3, the charging protection unit 9 will electromagnetically connect the load 4 to be charged and the charging gun 8 according to the locking signal to ensure that the load 4 to be charged and the charging gun 8 are firmly connected to avoid safety problems such as high-voltage electric shock.

[0085] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0086] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A charging circuit for a mobile charging device, characterized in that: include: Power supply module, voltage conversion module and control module; The voltage conversion module is electrically connected to the power supply module and the load to be charged respectively; The control module is electrically connected to the voltage conversion module; The control module is also in communication connection with the load to be charged, and is used to obtain the charging voltage and charging power of the load to be charged, and control the voltage conversion module to perform voltage conversion processing on the supply voltage output by the power supply module, so that the voltage conversion module charges the load to be charged.

2. The charging circuit according to claim 1, characterized in that: The power supply module includes: a power supply body and a power management unit; The power source body is provided with at least one battery module; The power management unit is electrically connected to the power source body, and is used to collect operating parameters of the battery module and control and manage the battery module.

3. The charging circuit according to claim 2, characterized in that: Also includes: Power replenishment unit; The power replenishment unit is electrically connected to the power management unit, and the power replenishment unit is also connected to an external power source. The power management unit is used to obtain the charging demand of the power source body when the power replenishment unit is connected to the external power source, and control the power replenishment unit to charge the power source body.

4. The charging circuit according to claim 2, characterized in that: The power management unit includes a main management unit and at least one balancing unit; The balancing unit is connected to the battery modules in a one-to-one correspondence, and is also connected to the main management unit. The balancing unit is used to collect the single cell parameters of the single cells in the battery module, send the single cell parameters to the main management unit, and balance the battery module; The main management unit is also connected to the voltage conversion module, and the main management unit is used to provide voltage to the voltage conversion module.

5. The charging circuit according to claim 4, characterized in that: The voltage conversion module includes a first voltage conversion unit and a second voltage conversion unit; The input end of the first voltage conversion unit is electrically connected to the first output end of the main management unit, the output end of the first voltage conversion unit is electrically connected to the control module, and the first voltage conversion unit is used to convert the supply voltage into a first working voltage to supply power to the control module; The input end of the second voltage conversion unit is electrically connected to the second output end of the main management unit, the output end of the second voltage conversion unit is electrically connected to the load to be charged, and the second voltage conversion unit is used to convert the supply voltage into a second working voltage to charge the load to be charged.

6. The charging circuit according to claim 1, characterized in that: Also includes: Current detection unit; The input end of the current detection unit is electrically connected to the voltage conversion module, and the output end of the current detection unit is electrically connected to the control module and the load to be charged respectively. The current detection unit is used to detect the current value output by the voltage conversion module and send the current value to the control module; The control module is also used to determine whether the charging circuit works normally according to the current value.

7. The charging circuit according to claim 6, characterized in that: Also includes: Power monitoring unit; The input end of the power monitoring unit is electrically connected to the current detection unit, and the output end of the power monitoring unit is electrically connected to the control module and the load to be charged respectively. The power monitoring unit is used to measure the current value output by the current detection unit and send the measurement result to the control module.

8. A mobile charging device, characterized in that: include: A charging gun and a charging circuit as described in any one of claims 1 to 7; The first end of the charging gun is pluggably connected to the load to be charged, and the second end of the charging gun is electrically connected to the power output end of the charging circuit; The charging circuit is also communicatively connected to the load to be charged via the charging gun.

9. The mobile charging device according to claim 8, characterized in that: The charging gun at least includes an insulation detection unit, a communication interaction unit, a signal transmission unit and a temperature detection unit; The insulation detection unit is electrically connected to the control module of the charging circuit, and is used to perform insulation detection between the charging gun and the load to be charged; The communication interaction unit is connected to the control module and the load to be charged, respectively, and is used to obtain the charging voltage and the charging power of the load to be charged, and transmit the charging voltage and the charging power to the control module; The signal transmission unit is connected to the control module and is used to send a signal of completion of connection between the charging gun and the load to be charged to the control module; The temperature detection unit is electrically connected to the insulation detection unit and the control module respectively, and is used to detect the temperature value of the insulation detection unit and send the temperature value to the control module.

10. The mobile charging device according to claim 8, characterized in that: Also includes: Charging protection unit; The charging protection unit is electrically connected to the control module and the charging gun respectively, and is used to detect the connection status between the charging gun and the load to be charged, receive a locking signal sent by the control module, and electromagnetically connect the load to be charged and the charging gun according to the locking signal.

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