CN110994753B

CN110994753B - Charging device and generator charger

Info

Publication number: CN110994753B
Application number: CN201911343863.8A
Authority: CN
Inventors: 康振华; 于江涛
Original assignee: Guangzhou Xaircraft Technology Co Ltd
Current assignee: Guangzhou Xaircraft Technology Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2021-06-15
Anticipated expiration: 2039-12-24
Also published as: CN110994753A

Abstract

The invention provides a charging device and a generator charger. The controller is used for controlling the charging device to be in a first or second working mode; in a first working mode, the first charging module is communicated with the first charging port, and the second charging module is communicated with the second charging port; in a second working mode, the first charging module and the second charging module are simultaneously communicated with one of the first charging port and the second charging port; in the second working mode, if the battery connected with the charging output port is powered off, the controller is used for controlling the switching module to maintain the current state for the preset duration so that the charging device is continuously in the second working mode, and the switching module is switched to the first working mode after the preset duration so as to avoid the generation of instantaneous high voltage at the non-charging output port, reduce the adverse effect on the battery or the equipment to be charged and improve the safety and the reliability of the system.

Description

Charging device and generator charger

Technical Field

The application relates to the technical field of charging, in particular to a charging device and a generator charger.

Background

Agricultural unmanned aerial vehicle is an unmanned aerial vehicle for promoting agricultural production efficiency, for example plant protection unmanned aerial vehicle of present wide application etc.. Agricultural unmanned aerial vehicle is in the field work, and the duration of operation has great influence to the efficiency of operation. In order to optimize the duration of operation, the current commonly used method is to increase the duration of the battery, or to charge the drone with a generator charger on the job site.

At present, the mode of charging for agricultural unmanned aerial vehicle at the operation site is charging by utilizing a fixed port, the charging mode is not flexible, the charging time is long, and the problem of inconvenience in charging exists in the actual use process.

Disclosure of Invention

In order to solve the above problems, the present invention provides a charging device, which includes a controller, a first charging module, a second charging module, a switching module, a first charging port, and a second charging port; the controller is electrically connected with the first charging module, the second charging module and the switching module; the controller is used for controlling the working state of the switching module so as to enable the charging device to be in a first working mode or a second working mode; when the charging device is in the first working mode, the controller is used for controlling the working state of the switching module, so that the first charging module is communicated with the first charging port through the switching module, and the second charging module is communicated with the second charging port through the switching module; when the charging device is in the second working mode, the controller is used for controlling the working state of the switching module, so that the first charging module and the second charging module are communicated with one of the first charging port and the second charging port through the switching module at the same time; when the charging device is in the second working mode, if the battery connected with the charging output port is powered off, the controller is used for controlling the switching module to maintain the current state for a preset time length so that the charging device is continuously in the second working mode, and the charging device is switched to the first working mode after the preset time length so as to avoid generating instantaneous high voltage at the non-charging output port.

The switching module comprises a first relay; the first relay comprises a normally closed loop and a normally open loop, the first charging module is connected with the first charging port through the normally closed loop of the first relay, and the first charging module is connected with the second charging port through the normally open loop of the first relay.

Further, the switching module further comprises a second relay; the second relay comprises a normally closed loop and a normally open loop, the second charging module passes through the second relay the normally closed loop is connected with the second charging port, and the second charging module passes through the second relay the normally open loop is connected with the first charging port.

Further, when the charging device is in the first working mode, the normally closed loop of the first relay is conducted, and the normally closed loop of the second relay is conducted; a normally open loop of the first relay is disconnected; the normally open loop of the second relay is disconnected;

when the charging device is in the second working mode, one of the first charging port or the second charging port is used as the charging output port, and the other one is used as the non-charging output port;

when the first charging port serves as the charging output port, the coil of the first relay is not electrified, the normally closed loop of the first relay is conducted, the normally open loop of the first relay is disconnected, the coil of the second relay is electrified, the normally closed loop of the second relay is disconnected, and the normally open loop of the second relay is conducted;

when the second charging port is used as the charging output port, the coil of the second relay is not electrified, the normally closed loop of the second relay is conducted, the normally open loop of the second relay is disconnected, the coil of the first relay is electrified, the normally closed loop of the first relay is disconnected, and the normally open loop of the first relay is conducted.

Further, when the battery connected to the charging output port is powered off, the controller is configured to control the switching module to maintain the second operating mode for a preset duration, so that a coil of the first relay or the second relay maintains a power-on state, residual charges in the charging device are consumed, and an instantaneous high voltage is prevented from being generated at the non-charging output port.

Furthermore, the charging device further comprises a power supply module, and the power supply module is electrically connected with the first charging module, the second charging module and the switching module;

the power supply module is used for supplying power to the first charging module, the second charging module and the switching module;

the power supply module is electrically connected with the controller, and the controller is further used for controlling the power supply module to stop supplying power when the battery connected with the charging output port is powered off.

Further, the power supply module includes an input bus, a transformer and multiple outputs, the input bus is used for accessing a power signal provided by an external power supply, the input bus is electrically connected with a primary side of the transformer, a secondary side of the transformer is electrically connected with the multiple outputs, and the transformer is used for supplying power to the first charging module, the second charging module and the switching module through the multiple outputs after the power signal of the input bus is reduced.

Furthermore, the first charging port and the second charging port are both provided with current acquisition circuits, and the current acquisition circuits are electrically connected with the controller and used for sending the currents of the first charging port and the second charging port to the controller;

when the first charging port or the second charging port is used as the charging output port, the controller is configured to determine that the battery connected to the charging output port is powered off when the current at the charging output port drops to zero.

Furthermore, each of the first charging module and the second charging module includes a first driving circuit, a second driving circuit, an upper half bridge, a lower half bridge, a first inductor, a second inductor and an output capacitor, the first driving circuit, the upper half bridge and the first inductor are sequentially electrically connected, the second driving circuit, the lower half bridge and the second inductor are sequentially electrically connected, the first inductor and the second inductor are electrically connected with the output capacitor and the current distribution module, the upper half bridge and the lower half bridge are connected to a power port, and the upper half bridge, the lower half bridge and the output capacitor are grounded;

the first driving circuit is used for driving the upper half bridge to be periodically conducted, and the second driving circuit is used for synchronously driving the lower half bridge to be periodically conducted, so that the upper half bridge and the lower half bridge are periodically in a first state and a second state;

when the upper half bridge and the lower half bridge are in a first state, the upper half bridge and the lower half bridge supply power to the switching module and charge the first inductor, the second inductor and the output capacitor;

when the upper half bridge and the lower half bridge are in a second state, the first inductor, the second inductor and the output capacitor supply power to the switching module.

The invention also provides a generator charger which comprises a generator and the charging device, wherein the generator is electrically connected with the charging device and is used for providing power for the charging device.

Compared with the prior art, the charging device and the generator charger provided by the invention have the following beneficial effects:

according to the charging device and the generator charger, the controller is electrically connected with the first charging module, the second charging module and the switching module; the controller is used for controlling the working state of the switching module so as to enable the charging device to be in a first working mode or a second working mode; when the charging device is in a first working mode, the controller is used for controlling the working state of the switching module, so that the first charging module is communicated with the first charging port through the switching module, and the second charging module is communicated with the second charging port through the switching module; when the charging device is in the second working mode, the controller is used for controlling the working state of the switching module, so that the first charging module and the second charging module are communicated with one of the first charging port or the second charging port through the switching module; when the charging device is in the second working mode, if the battery connected with the charging output port is powered off, the controller is used for controlling the switching module to maintain the current state for a preset duration, so that the charging device is continuously in the second working mode, and the charging device is switched to the first working mode after the preset duration, so as to avoid generating instantaneous high voltage at the non-charging output port. Through setting up two modules and two ports that charge, can select the mode of charging in a flexible way, satisfy different charging demands, when the battery outage, charging device just switches after delaying to predetermine for a long time when second mode switches to first mode, avoids the electric charge that remains in the system to produce instantaneous high pressure at the output port that charges of non-, reduces the harmful effects to the battery or treat charging apparatus, improves system security, reliability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 shows a schematic diagram of a charging device provided in this embodiment.

Fig. 2 shows a schematic diagram of another charging device provided in this embodiment.

Fig. 3 shows a schematic diagram of a power supply module provided in the present embodiment.

Fig. 4 shows a schematic diagram of the charging module provided in the present embodiment.

Fig. 5 shows a schematic circuit diagram of a part of the charging module provided in this embodiment.

Fig. 6 shows a flow chart of a charging device control method provided by the present embodiment.

Icon: 100-a charging device; 120-a first charging module; 121-a power conversion circuit; 122-upper half bridge; 123-lower half-bridge; 124-a first drive circuit; 125-a second drive circuit; 126-first inductance; 127-a second inductance; 128-output capacitance; 130-a second charging module; 151-first charging port; 152-a second charging port; 160-a switching module; 161-a first relay; 162-a second relay; 170-a power supply module; 171-input bus; 172-transformer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Compared with a manned airplane, the unmanned aerial vehicle has the characteristics of small volume, low manufacturing cost, convenience in use and the like, and has wide application in the fields of aerial photography, agriculture, plant protection and the like. However, these features of the drone, such as light weight and small size, also limit its endurance.

Use agricultural unmanned aerial vehicle as an example, because agricultural unmanned aerial vehicle generally works in the open-air environment, agricultural unmanned aerial vehicle's quality and volume have the restriction to the battery capacity of carrying, and the capacity of battery can not be too big, leads to agricultural unmanned aerial vehicle's continuation of the journey shorter. In the operation process, the charging is needed for many times, and the endurance is supplemented. Agricultural unmanned aerial vehicle's operation environment is many in the field, does not possess the environment that utilizes the commercial power to charge, and the battery of agricultural unmanned aerial vehicle is charged through the generator charger mostly, for example diesel generator charger or petrol generator charger.

Present partial generator charger voltage on the one hand is unstable, can not provide stable commercial power, and the speed that charges for a plurality of unmanned aerial vehicle in proper order is slower, and on the other hand, the mode that charges for agricultural unmanned aerial vehicle at the job site charges for utilizing fixed port, and the charging mode is not nimble. For example, the user cannot charge a plurality of drones simultaneously through the charging circuit.

In view of this, the present application provides a charging device, and referring to fig. 1, fig. 1 shows a functional module schematic diagram of the charging device provided in the embodiment of the present application. The charging device that this application provided carries out the exemplary illustration below, can understand, the charging device that this application provided can be applied to unmanned aerial vehicle scene of charging, also can be applied to the scene when charging for the battery of other equipment, and this application does not restrict charging device's application area and specific use scene.

As a possible implementation manner, referring to fig. 1, the charging device 100 includes a controller (not shown), a first charging module 120, a second charging module 130, a switching module 160, a first charging port 151, and a second charging port 152. The first charging port 151 corresponds to the first charging module 120, and the second charging port 152 corresponds to the second charging module 130.

The controller is electrically connected with the first charging module 120, the second charging module 130 and the switching module 160; the controller is used for controlling the operating state of the switching module 160, so that the charging device 100 is in the first operating mode or the second operating mode.

The first operation mode is a slow charging mode, and when the charging device 100 is in the first operation mode, the controller is configured to control an operation state of the switching module 160, so that the first charging module 120 is communicated with the first charging port 151 through the switching module 160, and the second charging module 130 is communicated with the second charging port 152 through the switching module 160. At this time, the first charging module 120 outputs the electric energy through the first charging port 151 to charge the battery connected to the first charging port 151, and the second charging module 130 outputs the electric energy through the second charging port 152 to charge the battery connected to the second charging port 152. In one possible embodiment, the first charging module 120 and the second charging module 130 can charge different batteries with the same current or voltage, respectively, and in the slow charging mode, the charging speed is slower, but 2 batteries can be charged at the same time.

A second operation mode, i.e. a fast charging mode, when the charging device 100 is in the second operation mode, the controller is configured to control an operation state of the switching module 160, so that the first charging module 120 and the second charging module 130 are simultaneously communicated with one of the first charging port 151 and the second charging port 152 through the switching module 160; at this time, the first charging module 120 and the second charging module 130 output through the same charging port, so that charging with higher voltage or current can be realized, and the charging efficiency can be improved. In one possible implementation, any one of the first charging port 151 and the second charging port 152 may be used as a charging output port, and the other charging port is a non-charging output port.

When the first charging port 151 is used as a charging output port, the first charging module 120 is communicated with the first charging port 151 through the switching module 160, the second charging module 130 is communicated with the first charging port 151 through the switching module 160, both the first charging module 120 and the second charging module 130 output electric energy through the first charging port 151 to charge a battery connected to the first charging port 151, and at this time, the second charging port 152 does not output electric energy. When the second charging port 152 is used as a charging output port, the first charging module 120 is communicated with the second charging port 152 through the switching module 160, the second charging module 130 is communicated with the second charging port 152 through the switching module 160, both the first charging module 120 and the second charging module 130 output electric energy through the second charging port 152 to charge a battery connected to the second charging port 152, and at this time, the first charging port 151 does not output electric energy. Under the mode of fast charging, the current output by the charging output port is doubled, the charging efficiency is improved, and the battery can be charged at a higher speed.

When the charging device 100 is in the second operating mode, if the battery connected to the charging output port is powered off, the controller is configured to control the switching module 160 to maintain the current state for a preset duration, so that the charging device 100 is continuously in the second operating mode, and switch to the first operating mode after the preset duration, so as to avoid generating an instantaneous high voltage at the non-charging output port.

Through the charging device 100 provided by the embodiment of the application, a plurality of batteries can be charged simultaneously, and one battery can be charged at a higher charging speed, so that the charging mode is more flexible, and the charging requirements of different scenes can be met.

In a possible scenario, when the battery connected to the charging output port is powered off, the charging device 100 may switch from the second operating mode to the default operating mode, i.e., the first operating mode, and each charging module is connected to one charging port for output. At this time, since the non-charging output port originally has no electric energy output, at the moment when the second working mode is switched to the first working mode, since the energy on the inductor in the charging module cannot be released, a high voltage is generated at the non-charging output port, and at this moment, if the non-charging output port is connected with a battery or equipment, the non-charging output port may be damaged by the instantaneous high voltage. In the scheme provided by the present gas generation embodiment, the controller controls the switching module 160 to maintain the current state for the preset duration, so that the charging device 100 is continuously in the second operating mode, and is switched to the first operating mode after the preset duration, thereby avoiding generating an instantaneous high voltage at the non-charging output port, and preventing damage to the battery or the charging device.

In one possible implementation, referring to fig. 2, the switching module 160 includes a first relay 161 and a second relay 162; the first relay 161 includes a normally closed circuit and a normally open circuit, the first charging module 120 is connected to the first charging port 151 through the normally closed circuit of the first relay 161, and the first charging module 120 is connected to the second charging port 152 through the normally open circuit of the first relay 161. The second relay 162 includes a normally closed loop and a normally open loop, the second charging module 130 is connected to the second charging port 152 through the normally closed loop of the second relay 162, and the second charging module 130 is connected to the first charging port 151 through the normally open loop of the second relay 162.

That is, in the default state, the charging device 100 provided in the embodiment of the present application operates in the first operation mode, that is, the slow charging mode. Only when the controller controls the switching module 160 to switch the operating state, that is, when any one of the first relay 161 or the second relay 162 turns on the normally open circuit, the controller adjusts to the second operating mode, that is, the fast charging mode.

In a possible implementation manner, when the charging device 100 is in the second operation mode, if the first charging port 151 is used as a charging output port, at this time, the coil of the first relay 161 is not powered on, the normally closed circuit of the first relay 161 is turned on, the normally open circuit of the first relay 161 is opened, the coil of the second relay 162 is powered on, the normally closed circuit of the second relay 162 is opened, and the normally open circuit of the second relay 162 is turned on; the first charging module 120 is connected to the first port through a first relay 161, and the second charging module 130 is connected to the second port through a second relay 162.

If the second charging port 152 is used as a charging output port, the coil of the second relay 162 is not energized, the normally closed circuit of the second relay 162 is turned on, the normally open circuit of the second relay 162 is turned off, the coil of the first relay 161 is energized, the normally closed circuit of the first relay 161 is turned off, and the normally open circuit of the first relay 161 is turned on; the first charging module 120 is connected to the second port through a first relay 161, and the second charging module 130 is connected to the second port through a second relay 162.

It can be understood that, when the charging device 100 is in the second operation mode, either one of the first relay 161 and the second relay 162 needs to open the normally closed circuit and open the normally open circuit, so that the first charging module 120 and the second charging module 130 can output electric energy through the same charging port for charging.

In this embodiment, the charging device 100 further includes a power supply module 170, referring to fig. 3, the power supply module 170 is electrically connected to the first charging module 120, the second charging module 130, and the switching module 160; the power supply module 170 is configured to supply power to the first charging module 120, the second charging module 130, and the switching module 160; in a possible implementation manner, the power supply module 170 includes an input bus 171, a transformer 172, and multiple outputs, where the input bus 171 is used to access a power signal (e.g., electric energy provided by a generator) provided by an external power source, the input bus 171 is electrically connected to a primary side of the transformer 172, a secondary side of the transformer 172 is electrically connected to the multiple outputs, and the transformer 172 is used to step down the power signal of the input bus 171 and then supply power to the first charging module 120, the second charging module 130, and the switching module 160 through the multiple outputs.

The power supply module 170 is electrically connected to the controller, and the controller is further configured to control the power supply module 170 to stop supplying power when the battery connected to the charging output port is powered off. When the battery connected to the charging output port is powered off, the charging device 100 has no target and cannot output electric energy continuously, and at this time, if the power supply of the charging device 100 is maintained and the inductor, the capacitor, and the like continuously store electric charge, the electric charge cannot be released, which may cause system damage. Therefore, when the battery connected to the charging output port is powered off, the power supply module 170 is controlled to stop supplying power. Avoiding damage to the circuit.

The power failure means that the battery connected to the charging output port cannot be charged continuously when the battery is fully charged, or the battery connected to the charging output port is disconnected from the charging output port, in a possible implementation manner, the first charging port 151 and the second charging port 152 are both provided with a current acquisition circuit (not shown in the drawing), and the current acquisition circuits are electrically connected with the controller and used for sending the currents of the first charging port 151 and the second charging port 152 to the controller; when the first charging port 151 or the second charging port 152 serves as a charging output port, the controller is configured to determine that the battery connected to the charging output port is powered off when the current of the charging output port decreases to zero.

In one possible implementation, the first charging module 120 is identical to the second charging module 130. The two symmetrical arrangements mean that the symmetry of the structure and the position is realized, and the signal size, the flow direction and the like of the output current are also symmetrical.

Since the first charging module 120 and the second charging module 130 are identical, only one of the charging modules is taken as an example for description in the present embodiment. Referring to fig. 4, fig. 4 is a functional block diagram of one of the first charging module 120 and the second charging module 130. Each charging module includes a power conversion circuit 121, a first driving circuit 124, a second driving circuit 125, an upper half bridge 122, a lower half bridge 123, a first inductor 126, a second inductor 127 and an output capacitor 128, the first driving circuit 124, the upper half bridge 122 and the first inductor 126 are sequentially electrically connected, the second driving circuit 125, the lower half bridge 123 and the second inductor 127 are sequentially electrically connected, the first inductor 126 and the second inductor 127 are electrically connected with the output capacitor 128 and the switching module 160, the upper half bridge 122 and the lower half bridge 123 are connected to a power port of the power conversion circuit 121, and the upper half bridge 122, the lower half bridge 123 and the output capacitor 128 are all grounded. The operation principle of the internal circuit of each charging module is exemplarily explained below.

The power conversion circuit 121 is configured to receive a power signal, convert a voltage of the power signal into a target voltage, and output the electric energy after voltage conversion to the upper half-bridge 122 and the lower half-bridge 123. The target voltage may be a certain value or a range of values, for example, the target voltage may be 150V; of course, it can also be defined that voltages in the range of 100V-150V are all target voltages.

As an alternative implementation manner, the power conversion circuit 121 provided in the present application includes an input capacitor, an input power source is connected to the input bus 171, the input capacitor (in this embodiment, the input power source refers to power generated by a generator) is also connected to the input bus 171, and the input capacitor is grounded, so as to buffer the voltage on the input bus 171 through the input capacitor. The number of the input capacitors may be one or more, wherein one end of each input capacitor is connected to the input bus 171, and the other end is directly grounded. Of course, the input capacitor may also be connected to the MOS transistor and indirectly grounded through the MOS transistor. The power signal is coupled to the power conversion circuit 121. When the MOS transistor is turned on, a part of the input power is output through the input bus 171 to supply power to the upper half bridge 122 and the lower half bridge 123; the other part charges the input capacitor, and the electric energy is buffered by the input capacitor.

Meanwhile, the first driving circuit 124 is used for driving the upper half-bridge 122 to be periodically turned on, and the second driving circuit 125 is used for synchronously driving the lower half-bridge 123 to be periodically turned on, so that the upper half-bridge 122 and the lower half-bridge 123 are periodically in the first state and the second state; when the upper half-bridge 122 and the lower half-bridge 123 are in the first state, the upper half-bridge 122 and the lower half-bridge 123 supply power to the switching module 160 and charge the first inductor 126, the second inductor 127, and the output capacitor 128; when the upper half-bridge 122 and the lower half-bridge 123 are in the second state, the first inductor 126, the second inductor 127 and the output capacitor 128 supply power to the switching module 160.

It should be noted that, in order to achieve the effect of stably outputting the target current and further charging the device to be charged, the circuits of the upper half bridge 122 and the lower half bridge 123 are the same, and the states of the upper half bridge 122 and the lower half bridge 123 need to be consistent, that is, when the upper half bridge 122 is in the first state, the lower half bridge 123 also needs to be in the first state synchronously; when the upper half-bridge 122 is in the second state, the lower half-bridge 123 also needs to be in the second state synchronously.

As an optional implementation manner, each of the upper half bridge 122 and the lower half bridge 123 includes a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm of the upper half bridge 122 are electrically connected to the first driving circuit 124, the first bridge arm and the second bridge arm of the lower half bridge 123 are electrically connected to the second driving circuit 125, the first bridge arms of the upper half bridge 122 and the lower half bridge 123 are connected to a power supply port, and the second bridge arms of the upper half bridge 122 and the lower half bridge 123 are grounded.

In this embodiment, the first state is a state when the upper half bridge 122 and the first leg of the lower half bridge 123 are on and the upper half bridge 122 and the second leg of the lower half bridge 123 are off. The second state is a state in which the first legs of the upper half-bridge 122 and the lower half-bridge 123 are disconnected and the second legs of the upper half-bridge 122 and the lower half-bridge 123 are connected.

Optionally, a first bridge arm of the upper half bridge 122 includes a first switching tube, a second bridge arm of the upper half bridge 122 includes a second switching tube, a first bridge arm of the lower half bridge 123 includes a third switching tube, and a second bridge arm of the lower half bridge 123 includes a fourth switching tube. The first switch tube is electrically connected to the first driving circuit 124, the power port and the first inductor 126; the second switch tube is electrically connected to the first driving circuit 124 and the first inductor 126, and the second switch tube is grounded; the third switch tube is electrically connected to the second driving circuit 125, the power port and the second inductor 127, respectively; the fourth switch tube is electrically connected to the second driving circuit 125 and the second inductor 127, and the fourth switch tube is grounded.

Fig. 5 is a schematic diagram of a partial circuit in the charging module, where a first switching tube Q19 and its corresponding driver form a first arm of the upper half-bridge 122, a second switching tube Q10 and its corresponding driver form a second arm of the upper half-bridge 122, a third switching tube Q21 and its corresponding driver form a first arm of the lower half-bridge 123, and a fourth switching tube Q23 and its corresponding driver form a second arm of the lower half-bridge 123. Although NMOS transistors are used for the first switch transistor Q19, the second switch transistor Q10, the third switch transistor Q21, and the fourth switch transistor Q23, in other embodiments, other switch devices, such as a triode or a PMOS transistor, may be selected, and the application is not limited thereto.

When the switching transistors are NMOS transistors, the gate of the first switching transistor Q19 is connected to the first driving circuit 124 through a driving device, the drain of the first switching transistor Q19 is connected to the power output port PVDD _ IN _ M of the power conversion circuit 121, and the source of the first switching transistor Q19 is connected to the first inductor 126; the gate of the second switch Q10 is connected to the first driver circuit 124 through a driver, the drain of the second switch Q10 is connected to the first inductor 126, and the source of the second switch Q10 is grounded. The gate of the third switching tube Q21 is connected to the second driving circuit 125 through a driving device, the drain of the third switching tube Q21 is connected to the power output port PVDD _ IN _ M of the power conversion circuit 121, and the source of the third switching tube Q21 is connected to the second inductor 127; the gate of the fourth switching transistor Q23 is connected to the second driving circuit 125 through a driving device, the drain of the fourth switching transistor Q23 is connected to the second inductor 127, and the source of the fourth switching transistor Q23 is grounded.

In order to increase the capacitance value of the output capacitor 128, the output capacitor 128 is formed by connecting a plurality of capacitors in parallel, i.e., C41, C42, and C45 to C48 in the figure.

When the upper half-bridge 122 and the lower half-bridge 123 are in the first state, the first driving circuit 124 drives the first switching tube Q19 to be turned on, the second driving circuit 125 synchronously drives the third switching tube Q21 to be turned on, and simultaneously, the second switching tube Q10 and the fourth switching tube Q23 are both in the off state. At this time, for the upper half-bridge 122, a part of the power inputted through the PVDD _ IN _ M port charges the capacitor through the loop of the first switch Q19, the first inductor 126 and the output capacitor 128, and another part of the power supplies the loop of the switching module 160 through the loop of the first switch Q19, the first inductor 126 and VOUT _ M. Similarly, for the lower half-bridge 123, a part of the power inputted through the PVDD _ IN _ M port charges the capacitor through the loop of the third switch Q21, the second inductor 127 and the output capacitor 128, and another part of the power supplies the switching module 160 through the loop of the third switch Q21, the second inductor 127 and VOUT _ M.

Also, it can be understood that, for the port VOUT _ M, the output current is the sum of the currents of the upper half-bridge 122 and the lower half-bridge 123. For example, if the current output by the upper half-bridge 122 is 15A and the current output by the lower half-bridge 123 is also 15A, the current output by the port VOUT _ M is 30A.

When the upper half-bridge 122 and the lower half-bridge 123 are in the second state, the first driving circuit 124 drives the second switching transistor Q10 to be turned on, the second driving circuit 125 synchronously drives the fourth switching transistor Q23 to be turned on, and simultaneously, the first switching transistor Q19 and the third switching transistor Q21 are both in the off state. At this time, the output capacitor 128, the first inductor 126 and the second switching tube Q10 form a loop to discharge the electric energy stored in the first inductor 126 and the output capacitor 128; the output capacitor 128, the second inductor 127 and the fourth switch Q23 also form a loop to discharge the electric energy stored in the second inductor 127 and the output capacitor 128. Meanwhile, during the discharging process of the capacitor, the power is also output through the port VOUT _ M to supply power to the switching module 160.

And, the charging module is periodically in the first state and the second state, which means that the upper half-bridge 122 and the lower half-bridge 123 are first in the first state and then in the second state, thereby completing a switching cycle. And after the second state is finished, the first driving circuit 124 controls the upper half-bridge 122 to be in the first state again, and the second driving circuit 125 controls the lower half-bridge 123 to be in the second state again, so that each charging module realizes the transmission of the electric energy to the switching module 160 through the periodic operation.

It should be noted that, the first driving circuit 124 and the second driving circuit 125 provided by the present application both use driving chips, and the present application does not limit the types of the driving chips at all, and it should be understood that the driving chip is connected to the upper half bridge 122, and actually, the driving chip is connected to the first switching tube Q19 and the second switching tube Q10 to drive the first switching tube Q19 or the second switching tube Q10 to be turned on.

And each driving chip is also connected with the controller. In this application, the controller can control two driver chips simultaneously, and then through the mode of sending control information to two driver chips, adjusts the duty cycle of the PWM (Pulse width modulation) signal that driver chip is output, and then adjusts the current value of going up half-bridge 122 and lower half-bridge 123 output.

In this embodiment, the controller may be an integrated circuit chip having signal processing capability. The controller may be a general-purpose processor including a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, and discrete hardware components. The controller may also be a microprocessor or any conventional processor or the like.

In one possible implementation manner, when the charging device 100 is in the second operation mode, the first charging module 120 and the second charging module 130 output electric energy through one charging port to perform charging, where the charging port serves as a charging output port, and the other charging port is a non-charging output port.

If the battery connected to the charging output port is powered off, the charging device 100 may switch from the second operating mode to the operating mode in the default state, that is, the first operating mode, and each charging module is connected to one charging port for output. At this time, since the non-charging output port originally has no electric energy output, at the moment when the second operating mode is switched to the first operating mode, since the energy on the inductor in the charging module cannot be released, the non-charging output port generates a high voltage in a state where the output capacitor 128 is fully charged, and at this time, if the non-charging output port is connected with a battery or a device, the non-charging output port may be damaged by the instantaneous high voltage.

In order to avoid the damage to the battery or the device due to the instantaneous high voltage generated at the moment when the second operating mode is switched to the first operating mode, when the battery connected to the charging output port is powered off, the controller is configured to control the switching module 160 to maintain the second operating mode for a preset time period, so that the coil of the first relay 161 or the second relay 162 is maintained in an energized state, the residual charge in the charging device 100 is consumed, and the instantaneous high voltage generated at the non-charging output port is avoided. In one possible implementation, when the battery connected to the charging output port is powered off and the controller controls the switching module 160 to maintain the second operation mode, the remaining charge in the charging module flows back to the output inductor through the output inductor and the output capacitor 128, then flows back to the output inductor in a direct current manner, flows back to the input bus 171 through the diode inside the half bridge, continues to supply power to the switching module 160 through the power supply module 170, and the coil of the first relay 161 or the second relay 162 maintains the power-on state until the remaining charge in the system is exhausted. In this process, the voltage of the output capacitor 128 gradually decreases until the voltage reaches the threshold value when the power supply module 170 touches the low-voltage shutdown, after the power supply module 170 is shutdown at the low voltage, the power supply module 170 disconnects the power supply, the controller loses the power, the coil of the first relay 161 or the second relay 162 cannot continuously maintain the power-on state, the normally open loop of the first relay 161 or the second relay 162 is disconnected, and the charging device 100 is switched from the second operating mode back to the first operating mode. At this time, the charge in the system is consumed, so that an instantaneous high voltage (or a generated voltage is small) is not generated, and the influence on the equipment connected with the non-charging output port is avoided.

The duration of the charge consuming process is short, and the preset duration is only longer than the duration of the charge consuming process, and in this embodiment, the preset duration may be set to 1 second. The charging device 100 provided in this embodiment can improve the service life of the switching module 160, reduce adverse effects on the battery or the device connected to the charging device 100, and improve system safety and reliability.

The present invention further provides a charging device control method, which is applied to the charging device provided in the foregoing embodiment, and the charging device operates in a second operating mode, it should be noted that the basic principle and technical effects of the charging device control method provided in this embodiment are substantially the same as those of the charging device provided in the foregoing embodiment, and for brief description, detailed description is not provided again in this embodiment, and similar parts are not described in this embodiment, please refer to related contents in the foregoing embodiment. Referring to fig. 6, the method for controlling the charging device includes:

step 110: and detecting whether the battery connected with the charging output port is powered off or not.

Step 120: when the battery connected with the charging output port is powered off, the switching module is controlled to maintain the current state for a preset duration, so that the charging device is continuously in the second working mode.

If the battery connected with the charging output port is powered off, the charging device can be switched to a working mode in a default state from the second working mode, namely the first working mode, and each charging module is respectively connected with one charging port for output. At this time, since the non-charging output port originally has no electric energy output, at the moment when the second working mode is switched to the first working mode, since the energy on the inductor in the charging module cannot be released, the non-charging output port generates high voltage in a state that the output capacitor is fully charged, and at this moment, if the non-charging output port is connected with a battery or equipment, the non-charging output port is possibly damaged by the instantaneous high voltage.

In order to avoid the damage to the battery or the device due to the instantaneous high voltage generated at the moment when the second operating mode is switched to the first operating mode, when the battery connected to the charging output port is powered off, the controller is configured to control the switching module to maintain the second operating mode for a preset time period, so that the coil of the first relay 161 or the second relay 162 is maintained in an energized state, the residual charge in the charging device is consumed, and the instantaneous high voltage generated at the non-charging output port is avoided.

Step 130: after the preset time length, the charging switching module is controlled to switch the state, so that the charging device is in a first working mode.

After the preset time length, the charge in the system is consumed, the power supply module is powered off, the controller is powered off, the coil of the first relay 161 or the second relay 162 cannot continuously maintain the power-on state, the normally open loop of the first relay 161 or the second relay 162 is disconnected, and the charging device is switched back to the first working mode from the second working mode. At this time, the charge in the system is consumed, so that an instantaneous high voltage (or a generated voltage is small) is not generated, and the influence on the equipment connected with the non-charging output port is avoided.

The embodiment of the application also provides a generator charger, which comprises a generator and the charging device, wherein the generator is electrically connected with the charging device and used for providing a power supply for the charging device.

The charging device is used for charging the equipment to be charged or the battery through the electric energy generated by the generator. Since the circuit structure and the operation principle of the charging circuit have been described in detail in the above embodiments, the details are not repeated herein.

In summary, the present application provides a charging device and a generator charger, wherein the charging device includes a controller, a first charging module, a second charging module, a switching module, a first charging port and a second charging port; the controller is electrically connected with the first charging module, the second charging module and the switching module; the controller is used for controlling the working state of the switching module so as to enable the charging device to be in a first working mode or a second working mode; when the charging device is in a first working mode, the controller is used for controlling the working state of the switching module, so that the first charging module is communicated with the first charging port through the switching module, and the second charging module is communicated with the second charging port through the switching module; when the charging device is in the second working mode, the controller is used for controlling the working state of the switching module, so that the first charging module and the second charging module are communicated with one of the first charging port or the second charging port through the switching module; when the charging device is in the second working mode, if the battery connected with the charging output port is powered off, the controller is used for controlling the switching module to maintain the current state for a preset duration so that the charging device is continuously in the second working mode, and the switching module is switched to the first working mode after the preset duration so as to avoid generating instantaneous high voltage at the non-charging output port, reduce adverse effects on the battery or equipment connected with the charging device, and improve the safety and reliability of the system.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A charging device is characterized by comprising a controller, a first charging module, a second charging module, a switching module, a first charging port and a second charging port;

the controller is electrically connected with the first charging module, the second charging module and the switching module; the controller is used for controlling the working state of the switching module so as to enable the charging device to be in a first working mode or a second working mode;

when the charging device is in the first working mode, the controller is used for controlling the working state of the switching module, so that the first charging module is communicated with the first charging port through the switching module, and the second charging module is communicated with the second charging port through the switching module;

when the charging device is in the second working mode, the controller is used for controlling the working state of the switching module, so that the first charging module and the second charging module are communicated with one of the first charging port and the second charging port through the switching module at the same time;

when the charging device is in the second working mode, if the battery connected with the charging output port is powered off, the controller is used for controlling the switching module to maintain the current state for a preset time length so that the charging device is continuously in the second working mode, and switching to the first working mode after the preset time length so as to avoid generating instantaneous high voltage at the non-charging output port;

each of the first charging module and the second charging module comprises a first driving circuit, a second driving circuit, an upper half bridge, a lower half bridge, a first inductor, a second inductor and an output capacitor, wherein the first driving circuit, the upper half bridge and the first inductor are sequentially and electrically connected, and the second driving circuit, the lower half bridge and the second inductor are sequentially and electrically connected;

the first end of the first inductor is connected with the upper half bridge, and the second end of the first inductor is connected with the output capacitor;

the first end of the second inductor is connected with the upper half bridge, the second end of the second inductor is electrically connected with the output capacitor, the upper half bridge and the lower half bridge are both connected to a power port, and the upper half bridge, the lower half bridge and the output capacitor are all grounded;

2. The charging device of claim 1, wherein the switching module comprises a first relay; the first relay comprises a normally closed loop and a normally open loop, the first charging module is connected with the first charging port through the normally closed loop of the first relay, and the first charging module is connected with the second charging port through the normally open loop of the first relay.

3. The charging device of claim 2, wherein the switching module further comprises a second relay; the second relay comprises a normally closed loop and a normally open loop, the second charging module passes through the second relay the normally closed loop is connected with the second charging port, and the second charging module passes through the second relay the normally open loop is connected with the first charging port.

4. The charging device of claim 3, wherein when the charging device is in the first mode of operation, the normally closed circuit of the first relay is conductive and the normally closed circuit of the second relay is conductive; a normally open loop of the first relay is disconnected; the normally open loop of the second relay is disconnected;

5. The charging device of claim 4, wherein when the battery connected to the charging output port is powered off, the controller is configured to control the switching module to maintain the second operating mode for a preset duration, so that the coil of the first relay or the second relay is maintained in an energized state, and residual charge in the charging device is consumed to avoid generating an instantaneous high voltage at the non-charging output port.

6. The charging device of claim 1, further comprising a power supply module electrically connected to the first charging module, the second charging module, and the switching module;

7. The charging device according to claim 6, wherein the power supply module includes an input bus, a transformer, and multiple outputs, the input bus is configured to be connected to a power signal provided by an external power source, the input bus is electrically connected to a primary side of the transformer, a secondary side of the transformer is electrically connected to the multiple outputs, and the transformer is configured to step down the power signal of the input bus and then supply power to the first charging module, the second charging module, and the switching module through the multiple outputs.

8. The charging device according to claim 1, wherein the first charging port and the second charging port are each provided with a current collection circuit, and the current collection circuits are electrically connected with the controller and used for sending the currents of the first charging port and the second charging port to the controller;

9. A generator charger, characterized in that the generator charger comprises a generator and a charging device as claimed in any one of claims 1 to 8, wherein the generator is electrically connected with the charging device for providing power supply for the charging device.