CN116846033A - Energy storage device for multi-port quick charging - Google Patents

Abstract

The invention discloses an energy storage device for multi-port quick charging, and belongs to the technical field of charging equipment. The energy storage device includes: a plurality of output modules configured to be electrically connected with a powered device; a plurality of DC-DC modules, each of the plurality of DC-DC modules configured to be disposed independently of one another and to provide output power to the powered device through a corresponding one of the plurality of output modules; a control module configured to be connected to each of the DC-DC modules and each of the plurality of output modules, respectively, and determine a DC-DC module to be compensated for which power compensation is desired based on the reference power and real-time output power of the plurality of DC-DC modules; and a power compensation module configured to be connected to the control module and each of the DC-DC modules, respectively, to compensate output power to the DC-DC module to be compensated according to a control signal of the control module.

Description

Energy storage device for multi-port quick charging

Technical Field

The invention relates to the technical field of charging equipment, in particular to an energy storage device for multi-port quick charging.

Background

In recent years, a plurality of fast charging protocol chips exist in the market, and charging equipment adopts two control schemes to realize multi-port fast charging, one scheme is to use one chip to realize the combined control of peripheral analog circuits of the chip, but the control method can not really realize multi-port independent fast charging basically, and the main problems are that: in the process of simultaneously and quickly charging a plurality of ports, if powered equipment is connected or disconnected, the charging equipment can restart the rest quick charging channels at the moment, so that bad experience is brought to users.

Particularly, when the power receiving device charged with high power is connected to the remaining fast charging channels, the fast charging channels are restarted, so that the input current of the power receiving device suddenly changes to generate a surge current voltage, and the surge current voltage not only easily shortens the service life of the battery of the power receiving device, but also easily damages electronic components of the power receiving device, thereby reducing the service life of the power receiving device.

The other scheme is to realize multi-port quick charging by adopting a mode of combining a plurality of chips. Because a plurality of chips are arranged on the charging equipment to occupy a larger circuit area, the volume of the charging equipment is increased, and the production cost of the charging equipment is also increased.

In view of the foregoing, it is desirable to provide an energy storage device for multi-port quick charge that is designed with multiple isolated quick charge channels to achieve multi-port independent quick charge, and that is capable of saving product area and manufacturing costs.

Disclosure of Invention

In order to solve at least one of the above problems and disadvantages of the prior art, the present invention provides an energy storage device for multi-port quick charging, which can at least partially realize multi-port independent quick charging, save product area and production cost. The technical scheme is as follows:

according to one aspect of the present invention, there is provided an energy storage device for multi-port fast charging, wherein,

the energy storage device includes:

a plurality of output modules configured to transmit electrical energy to a powered device;

a plurality of DC-DC modules, each of the plurality of DC-DC modules configured to be disposed independently of one another and to provide output power to the powered device through a corresponding one of the plurality of output modules;

a control module configured to be connected to each of the DC-DC modules and each of the plurality of output modules, respectively, and determine a DC-DC module to be compensated for which power compensation is desired based on a reference power and real-time output powers of the plurality of DC-DC modules; and

And the power compensation module is configured to be connected with the control module and each DC-DC module respectively so as to compensate output power to the DC-DC module to be compensated according to a control signal of the control module.

Specifically, the control module compares the reference power with the real-time output power of the DC-DC module connected to the powered device, and determines that the DC-DC module is the DC-DC module to be compensated when the real-time output power of the DC-DC module connected to the powered device is less than the reference power.

Further, the control module regulates and controls the output power of the plurality of DC-DC modules in a polling mode, and the plurality of output modules and the plurality of DC-DC modules are arranged in one-to-one correspondence with each other.

Specifically, the control module compares the maximum power received by the power receiving device with the maximum output power of the energy storage device, and takes the minimum power value of the maximum power received by the power receiving device and the maximum output power of the energy storage device as the reference power.

Specifically, when the control module determines that at least one DC-DC module to be compensated exists in the plurality of DC-DC modules, the control module controls the power compensation module to compensate the output power to the corresponding DC-DC module to be compensated so as to regulate and control the output power of the corresponding DC-DC module to be compensated.

Further, the control module compares the reference power with the real-time output power of the DC-DC module connected with the powered device, and when the real-time output power of the DC-DC module connected with the powered device is equal to the reference power, the control module controls the DC-DC module to output according to the reference power.

Specifically, when at least one DC-DC module to be compensated exists in the plurality of DC-DC modules, the power compensation module compensates output power to the DC-DC module to be compensated with higher priority according to the preset priority of the DC-DC module.

Specifically, when at least two DC-DC modules to be compensated exist in the plurality of DC-DC modules, the control module controls the power compensation module to sequentially compensate output power to all DC-DC modules to be compensated in the at least two DC-DC modules to be compensated according to a polling sequence.

Preferably, the polling sequence is arranged according to the preset priority sequence of the DC-DC module.

More preferably, the control module polls the plurality of DC-DC modules in turn in a timed polling manner,

and in the same polling time, the control module regulates and controls the output power of the same DC-DC module.

Further, when the output power of the DC-DC module to be compensated is equal to the maximum power of the powered device electrically connected thereto, the control module controls the power compensation module to stop compensating the output power to the DC-DC module to be compensated,

The control module adjusts the output power of the DC-DC module to be compensated according to each preset adjustment precision value by controlling the power compensation module.

Further, the control module compares the reference power with the real-time output power of the DC-DC module connected with the powered device, and when the real-time output power of the DC-DC module connected with the powered device is larger than the reference power, the control module controls the DC-DC module to restart.

Specifically, each DC-DC module is provided with a compensation input port connected with the power compensation module, the power compensation module compensates output power to the DC-DC module to be compensated corresponding to the compensation input port through the compensation input port,

and the control module collects the input power of the compensation input port of each DC-DC module, and when the control module determines that the input power of the compensation input port of the DC-DC module to be compensated is larger than the maximum tolerance power of the DC-DC module to be compensated, the control module cuts off the connection between the power compensation module and the DC-DC module to be compensated so as to protect the DC-DC module to be compensated.

Preferably, the input power at the compensation input port is obtained by the control module collecting the input voltage at the compensation input port, the maximum withstand power is obtained by the control module collecting the maximum withstand voltage of the DC-DC module to be compensated,

When the input voltage at the compensation input port is larger than the maximum tolerance voltage of the DC-DC module to be compensated corresponding to the compensation input port, the control module cuts off the connection between the power compensation module and the DC-DC module to be compensated.

Specifically, the control module is an IC chip, a main control module and a loop compensation module are integrated in the IC chip, the main control module is respectively connected with each output module to collect the maximum power of the power receiving equipment correspondingly connected with the main control module, and is connected with each DC-DC module to collect the real-time output power of each DC-DC module,

the loop compensation module is respectively connected with the main control module and each DC-DC module, the main control module transmits the collected maximum power of the power receiving equipment and the real-time output power of the DC-DC module corresponding to the power receiving equipment to the loop compensation module,

the loop compensation module compares the maximum power received and the maximum output power to determine the reference power, compares the reference power with the real-time output power, and regulates the output power of the DC-DC module corresponding to the power receiving equipment according to the comparison result.

Preferably, the loop compensation module includes a controller and a driver, the main control module transmits the maximum power, the real-time output power and the maximum output power to the controller, the controller determines the reference power according to the maximum power and the maximum output power, then compares the reference power with the real-time output power and generates a driving control signal according to a comparison result, and then transmits the driving control signal to the driver, and the driver drives the DC-DC module and the power compensation module corresponding to the real-time output power according to the driving control signal to regulate the output power of the DC-DC module.

More preferably, the controller includes an analog-to-digital converter, a Filter unit, and a PWM generator, the maximum power receiving power is obtained by the main control module collecting a maximum power receiving voltage and a maximum power receiving current of the power receiving device, the real-time output power is obtained by collecting a real-time output voltage and a real-time output current of a DC-DC module electrically connected to the power receiving device,

the main control module transmits the maximum power receiving voltage of the collected power receiving equipment, the real-time output voltage of the DC-DC module electrically connected with the main control module and the maximum output voltage of the energy storage device to the analog-to-digital converter, the analog-to-digital converter transmits the converted maximum power receiving voltage digital signal, the real-time output voltage digital signal and the maximum output voltage digital signal to the Filter unit for comparison, the Filter unit transmits the comparison result to the PWM generator to generate the driving control signal, and the PWM generator transmits the driving control signal to the driver.

The energy storage device for multi-port fast charging according to the embodiment of the invention has at least one of the following advantages:

(1) According to the energy storage device for multi-port quick charging, the plurality of DC-DC modules can be independently regulated and controlled in a polling mode through one chip, so that real multi-port independent quick charging is realized, no matter any output port is plugged into or pulled out of powered equipment or an overload state occurs at any port, other DC-DC modules, such as other DC-DC modules which cannot be restarted, cannot generate impulse voltage current and the like on powered equipment connected with the power modules, and meanwhile, experience of a user is improved;

(2) The energy storage device for multi-port quick charging provided by the invention is controlled by one chip, so that the circuit area of the energy storage device is reduced, and the production and manufacturing cost of energy storage equipment is further reduced;

(3) According to the energy storage device for multi-port quick charge, other DC-DC modules can not be restarted when any output port is plugged into or pulled out of the powered device or an overload state occurs at any port, so that damage to electronic components and batteries of the powered device is avoided;

(4) According to the energy storage device for multi-port quick charging, provided by the invention, through voltage acquisition of the compensation input port of the DC-DC module, the connection between the power compensation module and the DC-DC module can be cut off in time when the output voltage of the power compensation module is greater than the maximum tolerance voltage of the DC-DC module, so that the damage of high voltage to the DC-DC module is avoided.

Drawings

These and/or other aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of an energy storage device according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of the loop compensation module shown in FIG. 1;

fig. 3 is a discharge waveform diagram when a powered device is connected to a first USB port in the energy storage device shown in fig. 1;

FIG. 4 is a discharge waveform diagram of the first USB port shown in FIG. 3 when a voltage is supplied to a powered device, the second USB port of the energy storage device being plugged into and pulled out of another powered device;

fig. 5 is a discharge waveform diagram when a power receiving device is connected to a charging port C1 of a conventional charging device;

fig. 6 is a discharge waveform of the charging port C2 of the charging device shown in fig. 5 to insert and extract another power receiving device when charging the power receiving device.

Detailed Description

The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the invention.

Referring to fig. 1, an energy storage device 100 for multi-port fast charging is shown according to one embodiment of the present invention. The energy storage device 100 includes a plurality of output modules, a plurality of DC-DC modules, a control module 30, and a power compensation module 40. The plurality of output modules are configured to transmit electrical energy to a powered device (not shown). In one example, a plurality of output modules transmit power to the powered device via a fast charge protocol. Each of the plurality of DC-DC modules is configured to be disposed independently of one another and to provide output power to the powered device through a corresponding one of the plurality of output modules. The control module 30 is configured to be connected to each of the DC-DC modules and each of the plurality of output modules, respectively, and to determine a DC-DC module to be compensated for which power compensation is desired based on the reference power and the real-time output power of the plurality of DC-DC modules. The power compensation module 40 is configured to be connected to the control module 30 and each of the DC-DC modules, respectively, to compensate the output power to the DC-DC module to be compensated according to a control signal of the control module 30.

The term "energy storage device" as used herein should be broadly interpreted as an energy storage device, energy including optical energy, electrical energy, chemical energy, thermal energy, mechanical energy, and the like. In one example, the energy storage device 100 is capable of converting at least one of light energy, chemical energy, thermal energy, and mechanical energy into electrical energy.

The term "fast charge" as used herein should be understood broadly as a method of charging that is fast, i.e. capable of bringing the battery of the powered device to or near a fully charged state within 30 minutes to 2 hours.

In one example, the energy storage device 100 may be a mobile power source, such as a charger, a mobile power source with lighting, a mobile power source with solar panels, a mobile power source that uses a battery to store electrical energy, and the like. The energy storage device 100 may also be a mobile phone with an electric energy output function, a portable computer (such as a tablet computer, a notebook computer) with an electric energy output function, an integrated computer, etc., and the energy storage device 100 may also be a charging pile, such as a charging pile for charging an electric bicycle, a charging pile for charging an electric automobile, etc.

In one example, the plurality of output modules may be electrically connected to the powered device by way of a wired connection (e.g., a USB port). It is of course also possible to electrically connect with the powered device by means of a wireless charging technique, for example by configuring the output module as an energy transmitter and configuring the energy receiver on the powered device, so that the energy storage device 100 is powered wirelessly with the powered device via the output module.

In one example, the plurality of output modules (i.e., multiple ports) includes a first USB port 11, a second USB port 12, and a third USB port 13. The plurality of DC-DC modules includes a first DC-DC module 21, a second DC-DC module 22, and a third DC-DC module 23. Those skilled in the art will appreciate that the output modules may be designed to be 2, 4 or more according to actual needs, and correspondingly the DC-DC modules may be designed to be 2, 4 or more according to actual needs. The plurality of output modules and the plurality of DC-DC modules are arranged in one-to-one correspondence with each other.

In one example, the first USB port 11 is connected to a first DC-DC module 21, the second USB port 12 is connected to a second DC-DC module 22, and the third USB port 13 is connected to a third DC-DC module 23. The power compensation module 40 is connected to the control module 30, the first DC-DC module 21, the second DC-DC module 22 and the third DC-DC module 23, respectively, and the control module 30 is connected to the first USB port 11, the second USB port 12, the third USB port 13, the first DC-DC module 21, the second DC-DC module 22 and the third DC-DC module 23, respectively.

In one example, the first, second and third DC-DC modules 21, 22 and 23 are each provided with a compensation input port (not shown). The power compensation module 40 compensates output power to the DC-DC module to be compensated for desired power compensation through respective compensation input ports of the first DC-DC module 21, the second DC-DC module 22 and the third DC-DC module 23.

In one example, control module 30 is an IC chip. The IC chip has a main control module 31 and a loop compensation module 32 integrated therein. The main control module 31 is connected to the first USB port 11, the second USB port 12, and the third USB port 13, respectively, to collect the maximum power received by the powered device connected to each USB port. In one example, the parameters of the digital circuits in the main control module and the loop compensation module in the chip are configured and modified by the host software without modifying the parameters in the existing peripheral circuits (i.e., analog circuits) by changing the capacitance and resistance.

And the main control module 31 is also connected to the first, second and third DC-DC modules 21, 22 and 23, respectively, to collect real-time output power connected to each DC-DC module and the compensation voltage VIN at the respective compensation input port.

The loop compensation module 32 is connected to the main control module 31, the first DC-DC module 21, the second DC-DC module 22 and the third DC-DC module 23, respectively. The main control module 31 transmits the collected maximum power received by the power receiving device, the real-time output power of the DC-DC module corresponding to the power receiving device, and the maximum output power of the energy storage device (e.g., the maximum output power of the DC-DC module corresponding to the power receiving device) to the loop compensation module 32.

For example, the main control module 31 collects the maximum power supply voltage VOUT (also referred to as maximum withstand voltage, maximum withstand voltage) and the maximum power supply current (also referred to as maximum withstand current, maximum withstand current) of the powered device connected at the first USB port 11, the second USB port 12, and the third USB port 13, respectively, to obtain the maximum power supply (also referred to as maximum withstand power, maximum power supply) at each USB port.

And the main control module 31 collects the real-time output voltages VSYS, the real-time output currents, the maximum withstand voltages and the maximum withstand currents of the first, second and third DC-DC modules 21, 22 and 23, respectively, to obtain the real-time output power and the maximum withstand power at the DC-DC modules.

The main control module 31 loads the maximum output voltage and the maximum output current of the energy storage device 100 stored in itself to obtain the maximum output power of the energy storage device 100, for example, the main control module 31 loads the maximum output voltage and the maximum output current of the DC-DC module corresponding to the powered apparatus in the energy storage device 100 stored in advance. In one example, when the master control module 31 does not collect the maximum power received by the powered device at the corresponding USB port, it is determined that the powered device at that port has been unplugged or has not had the powered device accessed, and the DC-DC module connected to that port is turned off and turned on until the powered device insertion is re-detected.

The loop compensation module 32 obtains the maximum power supply voltage VOUT and the maximum power supply current from the power supply device at each USB port of the main control module 31, the real-time output voltage VSYS and the real-time output current of each DC-DC module, and the compensation voltage VIN, and the maximum output voltage and the maximum output current of the energy storage device.

As shown in connection with fig. 1 and 2, the loop compensation module 32 includes a controller 320 and a driver 310, the controller 320 including an analog-to-digital converter (ADC) 321, a Filter unit 322, and a PWM generator 323. The main control module 31 transmits the collected maximum power receiving voltage VOUT of the power receiving device at each USB port, the real-time output voltage VSYS of each DC-DC module, the compensation voltage VIN, the maximum withstand voltage, and the maximum output voltage of the energy storage device 100 (e.g., the maximum output voltage of the DC-DC module corresponding to the power receiving device) to the analog-to-digital converter 321. The analog-to-digital converter (ADC) 321 then performs analog-to-digital conversion on the received voltage signal, and transmits the converted maximum power-receiving voltage digital signal of the power receiving device at each USB port, the voltage digital signal output by each DC-DC module in real time, the compensation voltage digital signal, the maximum withstand voltage digital signal, and the maximum output voltage digital signal of the energy storage device 100 (e.g., the maximum output voltage digital signal of the DC-DC module corresponding to the power receiving device) to the Filter unit 322 for comparison, the Filter unit 322 transmits the comparison result to the PWM generator 323 to generate a driving control signal, and then the PWM generator 323 transmits the driving control signal to the driver 310, and the driver 310 drives the DC-DC module (and the power compensation module 40) according to the driving control signal.

When the Filter unit 322 receives the maximum power receiving voltage digital signal of the power receiving device at the USB port after the analog-to-digital conversion, the real-time output voltage digital signal of the DC-DC module corresponding thereto, and the maximum output voltage digital signal of the energy storage device 100 (e.g., the maximum output voltage digital signal of the DC-DC module corresponding thereto), the maximum power receiving voltage digital signal and the maximum output voltage digital signal are compared and the minimum voltage value among them is determined as the reference voltage, and then the reference voltage is compared with the real-time output voltage digital signal, and the comparison result is transmitted to the PWM generator 323 to generate the driving control signal for regulating the DC-DC module.

In one example, when the maximum power receiving voltage digital signal is smaller than the maximum output voltage digital signal, the Filter unit 322 generates a stop signal and transmits the stop signal to the PWM generator 323 to stop transmission of the driving control signal to the DC-DC module corresponding to the power receiving apparatus, and then compares the minimum voltage value, i.e., the maximum power receiving voltage, among them as the reference voltage with the real-time output voltage digital signal.

Of course, those skilled in the art will understand that the Filter unit 322 may also receive the maximum power digital signal of the powered device at the USB port after analog-to-digital conversion, the real-time output power digital signal of the DC-DC module corresponding thereto, and the maximum output power digital signal of the energy storage device 100 (e.g., the maximum output power digital signal of the DC-DC module corresponding thereto), and compare the maximum power digital signal with the maximum output power digital signal and determine the minimum power value of them as the reference power.

Hereinafter, the first USB port 11, the second USB port 12, and the third USB port 13 are each connected with a powered device as an exemplary description. Of course, it should be understood by those skilled in the art that, in actual use, only any 1 or any 2 of the first to third USB ports may be connected with a powered device, and the working principle thereof is exactly the same as that of the 3 USB ports all connected with the powered device, which is not described herein in detail. The types of powered devices to which the 3 USB ports are connected may be the same as or different from each other.

In one example, when the comparison result received by the PWM generator 323 is that the reference voltage is greater than the real-time output voltage, the PWM generator 323 determines that the DC-DC module is a DC-DC module to be compensated and generates a driving control signal for compensating the output voltage of the DC-DC module to be compensated, or when the comparison result received by the PWM generator 323 is that the reference power is greater than the real-time output power, the PWM generator 323 determines that the DC-DC module is a DC-DC module to be compensated and generates a driving control signal for compensating the output power of the DC-DC module to be compensated.

The PWM generator 323 then transmits a driving control signal to the driver 310, and then the driver 310 drives the power compensation module 40 (e.g., a battery or an AD-DC module) to compensate the output voltage to the DC-DC module to be compensated based on the driving control signal of the compensating output voltage, and the DC-DC module to be compensated performs a boosting operation based on the driving control signal of the compensating output voltage and the compensating voltage VIN from the power compensation module 40 to realize regulation of the output voltage of the DC-DC module to be compensated.

Alternatively, the driver 310 drives the power compensation module 40 to compensate the output power to the DC-DC module to be compensated based on the driving control signal of the compensation output power, and the DC-DC module to be compensated performs a power up-regulation operation based on the driving control signal of the compensation output power and the compensation power from the power compensation module 40 to realize regulation of the output power of the DC-DC module to be compensated. It will be appreciated by those skilled in the art that the regulation of the output power may be achieved by regulating the output voltage and/or the output current.

In one example, the driver drives the power compensation module 40 to adjust/compensate the output power of the DC-DC module to be compensated by a preset adjustment accuracy value σ (e.g., 1W) each time. When the output power of the DC-DC module to be compensated is still smaller than the reference power after increasing each preset adjustment accuracy value σ (e.g., 1W, 2W), the PWM generator 323 will generate the driving control signal again, and the driver 310 adjusts the output power of the DC-DC module to be compensated up again according to each preset adjustment accuracy value σ (e.g., 1W, 2W). And the like, stopping power compensation until the output power of the DC-DC module to be compensated is equal to the reference power.

For example, when the Filter unit 322 receives the maximum power receiving voltage digital signal from the power receiving device at the first USB port 11, the real-time output voltage digital signal of the first DC-DC module 21, and the maximum output voltage digital signal of the energy storage device 100 (e.g., the maximum output voltage digital signal of the first DC-DC module 21), the maximum power receiving voltage digital signal of the power receiving device and the maximum output voltage digital signal of the energy storage device 100 (e.g., the maximum output voltage digital signal of the first DC-DC module 21) are compared and the minimum voltage value thereof is determined as the reference voltage, and then the reference voltage and the real-time output voltage digital signal of the first DC-DC module 21 are compared and the comparison result is transmitted to the PWM generator 323 to generate the driving control signal that regulates the first DC-DC module 21.

For example, when the comparison result received by the PWM generator 323 is that the reference voltage is greater than the real-time output voltage of the first DC-DC module 21, the PWM generator 323 determines that the first DC-DC module 21 is a DC-DC module to be compensated, and generates a driving control signal for compensating the output voltage of the first DC-DC module 21.

Or, when the comparison result received by the PWM generator 323 is that the reference power is greater than the real-time output power of the first DC-DC module 21, the PWM generator 323 determines that the first DC-DC module 21 is the DC-DC module to be compensated, and generates a driving control signal for compensating the output power of the first DC-DC module 21.

Thereafter, the PWM generator 323 transmits a driving control signal to the driver 310, the driver 310 drives the first DC-DC module 21 and the power compensation module 40, respectively, the power compensation module 40 compensates an output voltage (the compensation voltage VIN shown in fig. 2) to the first DC-DC module 21 based on the driving of the driver 310, and the first DC-DC module 21 performs a boosting operation based on the driving of the driver 310 and the compensation voltage from the power compensation module 40 to regulate the output voltage of the first DC-DC module 21.

Alternatively, the power compensation module 40 compensates the output power to the first DC-DC module 21 based on the driving of the driver 310, and the first DC-DC module 21 performs a power up-regulating operation based on the driving of the driver 310 and the compensation power from the power compensation module 40 to regulate the output power of the first DC-DC module 21.

In one example, when the comparison result received by the PWM generator 323 is that the DC-DC module real-time output voltage is greater than the maximum power receiving voltage of the power receiving apparatus electrically connected thereto, the PWM generator 323 generates a driving control signal to turn off and restart the DC-DC module.

Thereafter, the PWM generator 323 transmits a driving control signal to the driver 310, and then the driver 310 stops driving the DC-DC module based on the driving control signal to turn off and restart the DC-DC module, and turns off and restarts the DC-DC module. During the DC-DC module shutdown restart, other DC-DC modules will not be affected in any way, e.g. other DC-DC modules will not be shutdown and restarted.

For example, when the comparison result received by the PWM generator 323 is that the real-time output voltage of the first DC-DC module 21 is greater than the reference voltage, the PWM generator 323 generates a driving control signal to turn off and restart the first DC-DC module 21. The PWM generator 323 then transmits the driving control signal to the driver 310, and the driver 310 stops driving the first DC-DC module 21 and turns off and restarts the first DC-DC module 21. During the shut down and restart of the first DC-DC module 21, the second DC-DC module 22 and the third DC-DC module 23 will not be shut down and restarted.

In one example, when the comparison result received by the PWM generator 323 is that the reference voltage is equal to the real-time output voltage, the PWM generator 323 generates a driving control signal having the reference voltage as the output voltage of the DC-DC module corresponding to the real-time output voltage, or when the comparison result received by the PWM generator 323 is that the reference power is greater than the real-time output power, the PWM generator 323 generates a driving control signal having the reference power as the output power of the DC-DC module corresponding to the real-time output power.

Then, the PWM generator 323 transmits a drive control signal to the driver 310, and then the driver 310 drives the DC-DC module based on the drive control signal of the output voltage to supply electric power to the powered device with the reference voltage as the output voltage.

Alternatively, the driver 310 drives the DC-DC module to supply electric power to the powered device as the reference power based on the drive control signal of the output power.

For example, when the comparison result received by the PWM generator 323 is that the reference voltage is equal to the real-time output voltage of the first DC-DC module 21, the PWM generator 323 generates a driving control signal having the reference voltage as the output voltage of the first DC-DC module 21.

Alternatively, when the comparison result received by the PWM generator 323 is that the reference power is equal to the real-time output power of the first DC-DC module 21, the PWM generator 323 generates the driving control signal with the reference power as the output power of the first DC-DC module 21.

Thereafter, the PWM generator 323 transmits a drive control signal to the driver 310, and the PWM generator 323 transmits the drive control signal to the driver 310, after which the driver 310 drives the first DC-DC module 21 to supply electric power to the powered device with the reference voltage as an output voltage based on the drive control signal of the output voltage.

Alternatively, the driver 310 drives the first DC-DC module 21 based on the drive control signal of the output power to supply electric power to the powered device with the reference power as the output power.

In one example, when the compensation voltage digital signal of the DC-DC module received by the Filter unit 322 is compared with the maximum withstand voltage digital signal thereof, the comparison result is transmitted to the PWM generator 323, when the PWM generator 323 detects that the compensation voltage value of the DC-DC module is greater than the maximum withstand voltage thereof, a driving control signal for cutting off the connection between the DC-DC module and the power compensation module 40 is generated, and then the driving control signal is transmitted to the driver 310, and the driver 310 stops the power compensation module 40 from transmitting the compensation voltage VIN to the DC-DC module or stops the DC-DC module from receiving the compensation voltage VIN transmitted by the power compensation module 40, so as to cut off the connection between the power compensation module 40 and the corresponding DC-DC module, thereby achieving the effect of protecting the DC-DC module. During the disconnection from the DC-DC module, no effect is exerted on the other DC-DC modules, e.g. no restart of the other DC-DC modules.

For example, when the Filter unit 322 receives the compensation voltage digital signal of the first DC-DC module 21 and the maximum withstand voltage digital signal of the first DC-DC module 21, the compensation voltage digital signal of the first DC-DC module 21 is compared with the maximum withstand voltage digital signal, and then the comparison result is transmitted to the PWM generator 323. When the PWM generator 323 detects that the compensation voltage value of the first DC-DC module 21 is greater than its maximum withstand voltage, then generates a drive control signal that cuts off the connection of the first DC-DC module 21 and the power compensation module 40, and then transmits the drive control signal to the driver 310, and the driver 310 controls the power compensation module 40 to disconnect its own voltage delivery circuit from the first DC-DC module 21 or controls the first DC-DC module 21 to disconnect its own voltage delivery circuit from the power compensation module 40, thereby cutting off the connection of the first DC-DC module 21 and the power compensation module 40.

In one example, the control module 30 regulates the output power of a plurality of DC-DC modules by polling.

In one example, the power compensation module 40 may compensate the output power (e.g., by adjusting the output voltage and/or the output current) to the higher priority DC-DC module to be compensated according to the preset priorities of the first, second, and third DC-DC modules 21, 22, 23.

For example, the DC-DC modules are preset with priority in order of the first DC-DC module 21, the second DC-DC module 22, and the third DC-DC module 23 from high to low. When the first, second and third DC-DC modules 21, 22 and 23 are all determined as DC-DC modules to be compensated, the power compensation module 40 compensates the output power to the first DC-DC module first according to the priority order. Of course, it will be appreciated by those skilled in the art that the output voltage and the output current may be compensated.

For example, when only the third DC-DC module 23 of the first, second, and third DC-DC modules 21, 22, and 23 is connected with a powered device, the control module 30 may poll only the third DC-DC module 23 according to a signal fed back from the third USB port 13. After the control module 30 determines that the third DC-DC module 23 is a DC-DC module to be compensated, the power compensation module 40 compensates the output voltage/output power to the third DC-DC module 23.

In one example, the control module 30 controls the power compensation module 40 to sequentially compensate the output power (e.g., by adjusting the output voltage and/or the output current) to the DC-DC module to be compensated in a polling order. Preferably, the polling sequence is arranged according to the preset priority sequence of the DC-DC module. More preferably, the control module 30 polls the first, second and third DC-DC modules 21, 22 and 23 in sequence in a timed polling manner.

For example, the polling order is from first to last, the first DC-DC module 21, the second DC-DC module 22, and the third DC-DC module 23. For example, the duty cycle of the loop compensation module 32 is divided equally into 3 equal divisions, i.e., the polling times T are T1-T2, T2-T3, and T3-T4. At times T1-T2, the loop compensation module 32 polls the first DC-DC module 21, and the driver 310 regulates the output power of the first DC-DC module 21 according to the driving control signal generated by the PWM generator 323. At times T2 to T3, the loop compensation module 32 polls the second DC-DC module 22, and the driver 310 regulates the output power of the second DC-DC module 22 according to the driving control signal generated by the PWM generator 323. At times T3 to T4, the loop compensation module 32 polls the third DC-DC module 23, and the driver 310 regulates the output power of the third DC-DC module 23 according to the driving control signal generated by the PWM generator 323.

Regulating the output power of the DC-DC module, i.e. controlling (and/or adjusting) the output power of the DC-DC module, includes regulating the output power of the DC-DC module up, not regulating the output power of the DC-DC module, shutting down and restarting the DC-DC module (when the DC-DC module no longer has power output).

The scheme in which the control module 30 regulates the output power of the first DC-DC module 21, the second DC-DC module 22, and the third DC-DC module 23 may be expressed as:

In equations (1) - (4), FUNC1 (P1) represents the scheme in which the driver 310 regulates the first DC-DC module 21, FUNC2 (P2) represents the scheme in which the driver 310 regulates the second DC-DC module 22, FUNC3 (P3) represents the scheme in which the driver 310 regulates the third DC-DC module 22, LOOP represents the scheme in which the LOOP compensation module 32 polls the first DC-DC module 21, the second DC-DC module 22 and the third DC-DC module 23 every duty cycle T, σ represents each preset adjustment accuracy value, which may be set to 1W, 2W, P1 represents the real-time output power of the first DC-DC module 21, P1M represents the maximum power received by the powered device connected to the first USB port 11, P2 represents the real-time output power of the second DC-DC module 22, P2M represents the maximum power received by the powered device connected to the second USB port 12, P3 represents the real-time output power of the third DC-DC module 23, P3M represents the maximum power received by the powered device connected to the third USB port 13, T1 represents the start time of the duty cycle of the LOOP compensation module 32 and the start time of the LOOP compensation module 32 polling the first DC-DC module 21, T2 is the end time of the LOOP compensation module 32 polling the first DC-DC module 21 and the start time of polling the second DC-DC module 22, i.e., the polling time T of the LOOP compensation module 32 polling the first DC-DC module 21 is T1 to T2, T3 is the end time of the LOOP compensation module 33 polling the second DC-DC module 22 and the start time of polling the third DC-DC module 23, i.e., the polling time T of the LOOP compensation module 32 polling the second DC-DC module 22 is T2 to T3, t4 is the termination time of the loop compensation module 32 polling the third DC-DC module 23, i.e. the polling time T of the loop compensation module 32 polling the third DC-DC module 23 is T3 to T4.

In one example, a first fast charge path is formed between the loop compensation module 32, the power compensation module 40, the first DC-DC module 21 and the first USB port 11, a second fast charge path is formed between the loop compensation module 32, the power compensation module 40, the second DC-DC module 22 and the second USB port 12, and a third fast charge path is formed between the loop compensation module 32, the power compensation module 40, the third DC-DC module 23 and the third USB port 13. When there are more DC-DC modules and output ports in the energy storage device 100, the structure and principle of forming the fast charging channel are identical to those of the first to third fast charging channels, and will not be described in detail herein.

The PWM generator 323 in the loop compensation module 32 polls the first, second and third DC-DC modules 21, 22, 23. That is, the schemes expressed by the above formulas (1) - (4) are performed by the PWM generator 323, thereby forming a case where the PWM generator 323 sequentially polls the first fast charge path, the second fast charge path, and the third fast charge path. Further, it is realized that the loop compensation module 32 performs information transfer processing and control output on different fast-charging channels (for example, the first to third fast-charging channels) at different polling times in the period; and in the same polling time, the loop compensation module 32 only performs information transfer processing and control output on the same fast charging channel (i.e., the first fast charging channel, the second fast charging channel or the third fast charging channel), that is, the mutual noninterference among the fast charging channels is realized, so that the output ports can be charged independently and fast.

In one example, when processing the first DC-DC module 21, the loop compensation module 32 compares the actual output power of the first DC-DC module 21 with the maximum power received by the powered device connected to the first USB port 11, and the second DC-DC module 22 and the third DC-DC module 23 that are not processed or are to be processed at this time remain unchanged from the last processed state, i.e., the state after processing during the last working period of the loop compensation module 32.

Examples:

referring to fig. 3 and 4, discharge waveforms at the first USB port 11 and the second USB port 12 of the energy storage device 100 according to an embodiment of the present invention are shown. Wherein, as shown in fig. 3, the first USB port 11 is plugged into the powered device at 1s and is always charged with an output voltage of 5V; as shown in fig. 4, the second USB port 12 is plugged into another powered device at 3s, and the discharging waveform of the first USB port 11 is not changed at this time, that is, the charging of the output voltage of 5V is still maintained; the powered device connected to the second USB port 12 is pulled out at 8.1s, where the output voltage is 0.

Therefore, when the energy storage device 100 provided by the invention performs multi-port fast charging, when the powered device connected with the second USB port 12 is connected to or disconnected from the power receiving device, the output voltage at the first USB port 11 does not change, i.e. no voltage abrupt change or no voltage surge phenomenon occurs, and no restarting phenomenon occurs to the port, so that the powered device being fast charged is not affected, and true independent fast charging is realized.

As shown in conjunction with fig. 5 and 6, discharge waveforms at a charging port C1 (not shown) and a charging port C2 (not shown) of the existing charging device are shown. The charging device is a device for realizing a quick charging scheme through combined control of a chip and a peripheral analog circuit thereof. As shown in fig. 5, the charging port C1 is inserted into the power receiving apparatus at 1s, and is charged with an output voltage of 5V; as shown in fig. 6, the charging port C2 is inserted into the power receiving apparatus at 2.3s, and is charged with an output voltage of 5V. As shown in fig. 5, the discharge waveform of the charge port C1 is changed at 3.3S, showing that the output voltage of the charge port C1 is 0 during 3.3S to 4.6S, and the output voltage of the charge port C1 is restored to 5V at 4.6S; as shown in fig. 6, the power receiving device connected to the charging port C2 is pulled out at 6s, where the output voltage is 0; as shown in fig. 5, the discharge waveform of the charge port C1 is changed at 8s, and it is shown that the output voltage of the charge port C1 is 0 during 8s to 9s, and the output voltage of the charge port C1 is restored to 5V again at 9 s.

It can be seen from this that the charging port C1 is restarted during 3.3s to 4.6s and during 8s to 9 s. That is, when the existing charging device performs multi-port fast charging, when the charging port C2 is connected to the power receiving device, the output voltage at the charging port C1 is suddenly changed, and a surge voltage phenomenon occurs, that is, the charging port C1 is restarted when the charging port C2 has the power receiving device inserted and pulled out, so that the power receiving device being fast charged is subjected to voltage surge, that is, the charging port C1 and the fast charging channel of the charging port C2 are not independent, and there is a mutual influence.

The energy storage device for multi-port fast charging according to the embodiment of the invention has at least one of the following advantages:

(1) According to the energy storage device for multi-port quick charging, the plurality of DC-DC modules can be independently regulated and controlled in a polling mode through one chip, so that real multi-port independent quick charging is realized, no matter any output port is plugged into or pulled out of powered equipment or an overload state occurs at any port, other DC-DC modules, such as other DC-DC modules which cannot be restarted, cannot generate impulse voltage current and the like on powered equipment connected with the power modules, and meanwhile, experience of a user is improved;

(2) The energy storage device for multi-port quick charging is controlled by the same chip, so that the circuit area of the energy storage device is reduced, and the production and manufacturing cost of energy storage equipment is further reduced;

(3) According to the energy storage device for multi-port quick charge, other DC-DC modules can not be restarted when any output port is plugged into or pulled out of the powered device or an overload state occurs at any port, so that damage to electronic components and batteries of the powered device is avoided;

(4) According to the energy storage device for multi-port quick charging, provided by the invention, through voltage acquisition of the compensation input port of the DC-DC module, the connection between the power compensation module and the DC-DC module can be cut off in time when the output voltage of the power compensation module is greater than the maximum tolerance voltage of the DC-DC module, so that the damage of high voltage to the DC-DC module is avoided.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims (17)

1. An energy storage device for multi-port quick charging is characterized in that,

the energy storage device includes:

a plurality of output modules configured to transmit electrical energy to a powered device;

a plurality of DC-DC modules, each of the plurality of DC-DC modules configured to be disposed independently of one another and to provide output power to the powered device through a corresponding one of the plurality of output modules;

a control module configured to be connected to each of the DC-DC modules and each of the plurality of output modules, respectively, and determine a DC-DC module to be compensated for which power compensation is desired based on a reference power and real-time output powers of the plurality of DC-DC modules; and

and the power compensation module is configured to be connected with the control module and each DC-DC module respectively so as to compensate output power to the DC-DC module to be compensated according to a control signal of the control module.

2. The energy storage device of claim 1, wherein the energy storage device comprises a housing,

the control module compares the reference power with the real-time output power of the DC-DC module connected with the power receiving equipment, and when the real-time output power of the DC-DC module connected with the power receiving equipment is smaller than the reference power, the DC-DC module is determined to be the DC-DC module to be compensated.

3. The energy storage device of claim 2, wherein the energy storage device comprises a housing,

the control module compares the maximum power received by the power receiving device with the maximum output power of the energy storage device, and takes the minimum power value of the maximum power received by the power receiving device and the maximum output power of the energy storage device as the reference power.

4. The energy storage device of claim 2, wherein the energy storage device comprises a housing,

the control module regulates the output power of the plurality of DC-DC modules in a polling mode,

the plurality of output modules and the plurality of DC-DC modules are arranged in one-to-one correspondence with each other.

5. The energy storage device of claim 4, wherein the energy storage device comprises a housing,

when the control module determines that at least one DC-DC module to be compensated exists in the plurality of DC-DC modules, the control module controls the power compensation module to compensate output power to the corresponding DC-DC module to be compensated so as to regulate and control the output power of the corresponding DC-DC module to be compensated.

6. The energy storage device of claim 5, wherein the energy storage device comprises,

the control module compares the reference power with the real-time output power of the DC-DC module connected with the power receiving equipment, and when the real-time output power of the DC-DC module connected with the power receiving equipment is equal to the reference power, the control module controls the DC-DC module to output according to the reference power.

7. The energy storage device of claim 5, wherein the energy storage device comprises,

when at least one DC-DC module to be compensated exists in the plurality of DC-DC modules, the power compensation module compensates output power to the DC-DC module to be compensated with higher priority according to the preset priority of the DC-DC module.

8. The energy storage device of claim 5, wherein the energy storage device comprises,

when at least two DC-DC modules to be compensated exist in the plurality of DC-DC modules, the control module controls the power compensation module to sequentially compensate output power to all DC-DC modules to be compensated in the at least two DC-DC modules to be compensated according to a polling sequence.

9. The energy storage device of claim 8, wherein the energy storage device comprises a housing,

the polling sequence is arranged according to the preset priority sequence of the DC-DC module.

10. The energy storage device of claim 8, wherein the energy storage device comprises a housing,

The control module polls the plurality of DC-DC modules in turn in a timed polling manner,

and in the same polling time, the control module regulates and controls the output power of the same DC-DC module.

11. The energy storage device of any of claims 1-10, wherein,

when the real-time output power of the DC-DC module to be compensated is equal to the reference power, the control module controls the power compensation module to stop compensating the output power to the DC-DC module to be compensated,

the control module adjusts the output power of the DC-DC module to be compensated according to each preset adjustment precision value by controlling the power compensation module.

12. The energy storage device of any of claims 1-10, wherein,

the control module compares the reference power with the real-time output power of the DC-DC module connected with the power receiving equipment, and when the real-time output power of the DC-DC module connected with the power receiving equipment is larger than the reference power, the control module controls the DC-DC module to restart.

13. The energy storage device of any of claims 1-10, wherein,

each DC-DC module is provided with a compensation input port connected with the power compensation module, the power compensation module compensates output power to the DC-DC module to be compensated corresponding to the compensation input port through the compensation input port,

And the control module collects the input power of the compensation input port of each DC-DC module, and when the control module determines that the input power of the compensation input port of the DC-DC module to be compensated is larger than the maximum tolerance power of the DC-DC module to be compensated, the control module cuts off the connection between the power compensation module and the DC-DC module to be compensated so as to protect the DC-DC module to be compensated.

14. The energy storage device of claim 13, wherein the energy storage device comprises a housing,

the input power at the compensation input port is obtained by the control module collecting the input voltage at the compensation input port, the maximum withstand power is obtained by the control module collecting the maximum withstand voltage of the DC-DC module to be compensated,

when the input voltage at the compensation input port is larger than the maximum tolerance voltage of the DC-DC module to be compensated corresponding to the compensation input port, the control module cuts off the connection between the power compensation module and the DC-DC module to be compensated.

15. The energy storage device of any of claims 1-10, wherein,

the control module is an IC chip, a main control module and a loop compensation module are integrated in the IC chip, the main control module is respectively connected with each output module to collect the maximum power of the power receiving equipment correspondingly connected with the main control module, and is connected with each DC-DC module to collect the real-time output power of each DC-DC module,

The loop compensation module is respectively connected with the main control module and each DC-DC module, the main control module transmits the collected maximum power of the power receiving equipment, the real-time output power of the DC-DC module corresponding to the power receiving equipment and the maximum output power of the energy storage device to the loop compensation module,

the loop compensation module compares the maximum power received and the maximum output power to determine the reference power, compares the reference power with the real-time output power, and regulates the output power of the DC-DC module corresponding to the power receiving equipment according to the comparison result.

16. The energy storage device of claim 15, wherein the energy storage device comprises,

the loop compensation module comprises a controller and a driver, the main control module transmits the maximum power, the real-time output power and the maximum output power to the controller, the controller determines the reference power according to the maximum power and the maximum output power, then compares the reference power with the real-time output power and generates a driving control signal according to a comparison result, the driving control signal is transmitted to the driver, and the driver drives a DC-DC module and a power compensation module corresponding to the real-time output power according to the driving control signal so as to regulate the output power of the DC-DC module.

17. The energy storage device of claim 16, wherein the energy storage device comprises,

the controller comprises an analog-to-digital converter, a Filter unit and a PWM generator, the maximum power receiving power is obtained by collecting the maximum power receiving voltage and the maximum power receiving current of the power receiving equipment through the main control module, the real-time output power is obtained by collecting the real-time output voltage and the real-time output current of the DC-DC module electrically connected with the power receiving equipment,

the main control module transmits the maximum power receiving voltage of the collected power receiving equipment, the real-time output voltage of the DC-DC module electrically connected with the main control module and the maximum output voltage of the energy storage device to the analog-to-digital converter, the analog-to-digital converter transmits the converted maximum power receiving voltage digital signal, the real-time output voltage digital signal and the maximum output voltage digital signal to the Filter unit for comparison, the Filter unit transmits the comparison result to the PWM generator to generate the driving control signal, and the PWM generator transmits the driving control signal to the driver.