TW201937826A - Charging device, method for determining charging sequence and method for power detection - Google Patents

Abstract

A charging device comprises a power management circuit and a controller connected with each other. The power management is configured to be connected with a power supply, a first subject device and a second subject device, to obtain a plurality of first input power information of the first subject device in a preset period, with the first input power information related to an input current of the first subject device, and to obtain a plurality of second input power information of the second subject device in the preset period, with the second input power information related to an input current of the second subject device. The controller calculates a variation rate of the first input power information and a variation rate of the second input power information, and determines a charging sequence according to the first variation rate and the second variation rate, wherein the charging sequence comprises a first order corresponding to the first subject device and a second order corresponding to the second subject device.

Description

Charging device, charging sequencing method and power detecting method

The present invention relates to a charging device, particularly a charging device having a sorting function.

A charging cabinet is a device that has multiple chargers to simultaneously charge multiple target devices. In general, a charging device such as a charging cabinet detects the battery power of each target device before charging the target device. The current power detection method directly measures the DC voltage of the battery of the target device to be converted into battery power. The charging device needs to obtain the DC voltage of the battery first by using the communication protocol used in the target device, and then charge or charge the battery. The cabinet is transmitted to the outside world by other means of communication.

Therefore, the charging device needs to specially set a line that can communicate with the target device. When the communication protocol used by the target device is not a well-known public communication protocol, the charging device needs to set up the original communication protocol for interrupting the target device, and then use its own communication protocol to perform the operation procedure of the power information acquisition. In this way, not only the cost of the line setting is high, but also the communication method of drawing power information is quite complicated.

In view of the above, the present invention provides a charging device, a charging sequencing method, and a power detecting method.

A charging device according to an embodiment of the present invention includes a power management circuit and a controller electrically connected to each other. a power management circuit, configured to connect to the power supply, the first target device, and the second target device, obtain a plurality of first input power information associated with the input current of the first target device for a predetermined period of time, and obtain a second The target device is associated with a plurality of second input power information of the input current during the preset time period. The controller calculates a first rate of change of the first input power information and a second rate of change of the second input power information, and sets a charging priority order according to the first rate of change and the second rate of change. The charging priority sequence includes a first sequence corresponding to the first target device and a second sequence corresponding to the second target device.

A charging sequencing method according to an embodiment of the present invention includes obtaining a plurality of first input power information associated with an input current by a first target device for a predetermined period of time, and obtaining a second target device associated with the preset time. a plurality of second input power information of the input current; the second target device calculates a first rate of change of the first input power information, and calculates a second rate of change of the second input power information; and according to the first rate of change and the second The rate of change sets a charging priority sequence; wherein the charging priority sequence includes a first sequence corresponding to the first target device and a second sequence corresponding to the second target device.

A method for detecting a quantity of electricity according to an embodiment of the present invention includes obtaining a plurality of input power information associated with an input current of a target device for a predetermined period of time to calculate a rate of change of the input power information; and charging according to the rate of change and charging The characteristic curve determines the proportion of the power of the target device.

With the above structure, the charging device, the charging sequencing method and the power detecting method disclosed in the present invention obtain the AC power information transmitted from the power supply device to the target device through the power management circuit, and the plurality of AC power information and the rate of change thereof are used according to the AC power information and the rate of change thereof. The target device performs classification, charging sequencing and power detection. This method does not need to enter the target device to obtain power information, reduce the cost of the line setting, and simplify the charging sequencing process.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a charging apparatus according to an embodiment of the invention. As shown in FIG. 1, the charging device 1 includes a power management circuit 11 and a controller 13 that are electrically connected to each other. When the charging device 1 is in operation, the power management circuit 11 is connected to the first target device 2a, the second target device 2b, and the power supply 3. The power management circuit 11 is configured to obtain a plurality of first input power information associated with the input current by the first target device 2a for a predetermined period of time, and obtain the second target device 2b associated with the input current during the preset time period. A plurality of second input power information. The first target device 2a and the second target device 2b have the same type of battery, that is, the batteries all have similar charging characteristics.

In detail, the power supply 3 is, for example, an AC power supply for supplying AC power to the first target device 2a and the second target device 2b. The power management circuit 11 of the charging device 1 is disposed between the power supply 3 and the first target device 2a to obtain a plurality of first input power information associated with the input current of the first target device 2a for a predetermined period of time, wherein The input current of the first target device 2a is the alternating current supplied by the power supply 3; similarly, the power management circuit 11 is also located between the power supply 3 and the second target device 2b to obtain the same preset time associated with the first The second input power information of the input current of the second target device 2b, wherein the input current of the second target device 2b is the alternating current supplied by the power supply 3. The preset time may be a preset value in the power management circuit 11 or set by a user, and a detailed architecture of the power management circuit 11 will be described later. For example, the first and second input power information obtained by the power management circuit 11 may be the input current values provided by the power supply 3 to the first and second target devices 2a and 2b, respectively, or may correspond to the input current. Input electrical power.

The controller 13 is, for example, a microcontroller (MCU), and receives the plurality of first input power information and the plurality of second input power information from the power management circuit 11 to calculate the plurality of first input powers. The rate of change of the information is used as a first rate of change, and a rate of change of the plurality of second input power information is calculated as a second rate of change. In detail, the controller 13 may have a memory to record the first and second input power information when the power management circuit 11 obtains the first and second input power information during the preset time period. Then, the first rate of change is calculated according to the recorded first input power information, and the second rate of change is calculated according to the recorded second input power information. The first rate of change of the first input power information indicates a change amount of the first input power information in a unit time, that is, a change amount of the first input power information in a preset time divided by a calculation result of the preset time, The second rate of change is equally available.

Then, the controller 13 sets the charging priority order according to the calculated first rate of change and the second rate of change, wherein the charging priority sequence includes positions corresponding to the first target device 2a and the second target device 2b, respectively. The sequence corresponding to the first target device 2a is hereinafter referred to as the first sequence, and the sequence corresponding to the second target device 2b is referred to as the second sequence. In particular, the first and second are not used to indicate the order of the two positions. In an embodiment, when determining that the first rate of change is greater than the second rate of change, the controller 13 sets the first sequence to take precedence over the second sequence. That is to say, the order arrangement in the charging priority order can be set according to the comparison of the change rate of the input power information, and a more detailed sorting method will be described later.

Referring to FIG. 1 to FIG. 3, a detailed architecture of the power management circuit is illustrated. FIG. 2 is a schematic structural diagram of a charging apparatus according to an embodiment of the present invention; FIG. 3 is another embodiment of the present invention. A detailed schematic diagram of the illustrated charging device. 2 and 3 illustrate the detailed architecture of the power management circuit 11 of the charging device 1 of Fig. 1.

In an embodiment, as shown in FIG. 2, the charging device 1' is the same as the charging device 1 of FIG. 1, and includes a power management circuit 11' and a controller 13, wherein the power management circuit 11' includes a power meter 111, The switching circuit 113, the first relay 115a, and the second relay 115b. The controller 13 is connected to the power amount measuring device 111, the first relay 115a, and the second relay 115b. The power meter 111 is for connection to the power supply 3, and the first relay 115a and the second relay 115b are respectively connected to the first target device 2a and the second target device 2b. For example, the power meter 111 can be an ammeter for obtaining the input current value provided by the power supply 3 to the first target device 2a as the first power information, and the second power information is obtained in the same manner. As another example, the power meter 111 may also be an electric power meter for obtaining the electric power of the power supplied from the power supply device 3 to the first target device 2a as the first power information, and similarly obtaining the second power information. In this example, the electric power meter can be implemented by a microcontroller.

The switching circuit 113 is electrically connected to the power measuring device 111, the first relay 115a and the second relay 115b, and the switching circuit 113 is composed of, for example, a plurality of switching elements, and the switching of the power supply force measuring unit 111 through the switching circuit 113 is performed from the first The target device 2a and the second target device 2b respectively acquire the first power information and the second power information. In an embodiment, the switching circuit 113 can be integrated with and collectively controlled by the power meter 111. In another embodiment, the switching circuit 113 can be independently set with the power meter 111 and controlled by the controller 13, respectively. The first relay 115a is also controlled by the controller 13 to provide power from the power supply 3 to the first target device 2a when turned on, and the second relay 115b is the same as the first relay 115a, and details are not described herein.

In another embodiment, as shown in FIG. 3, the charging device 1" is the same as the charging device 1 of FIG. 1, and includes a power management circuit 11" and a controller 13, wherein the power management circuit 11" includes the first power measurement. The controller 111a, the second power meter 111b, the first relay 115a and the second relay 115b. The controller 13 is electrically connected to the first power meter 111a, the second power meter 111b, the first relay 115a and the first The second relay 115b. The first power meter 111a and the second power meter 111b are connected to the power supply 3, and the first relay 115a and the second relay 115b are respectively connected to the first target device 2a and The second target device 2b. In other words, the first power amount measuring device 111a is disposed between the power supply device 3 and the first target device 2a (connected to the first target device 2a through the first relay 111a), the second power amount The meter 111b is disposed between the power supply 3 and the second target device 2b (connected to the second target device 2b through the second relay 111b). Thereby, the first power meter 111a can be associated with the power supply 3 is provided to the first target device 2a A first power input current information, and the second electric power can be obtained altimeter 111b associated with the second power supply provides power to the information input current of the second target device 2b, 3.

For example, the first and second power measuring devices 111a and 111b may be galvanometers, and the first power measuring device 111a may obtain the input current value supplied from the power supply device 3 to the first target device 2a as the first A power information, and the second power meter 111b obtains the input current value supplied from the power supply 3 to the second target device 2b as the second power information. As another example, the first and second power meters 111a and 111b may also be electric power meters for respectively obtaining electric power of the electric power input to the first and second target devices 2a and 2b as the first and second electric power. News.

In the embodiment of FIG. 2 and FIG. 3, after the controller 13 calculates the first rate of change of the first power information and the second rate of change of the second power information in a predetermined time period, and then sets the charging priority order, Further, the first relay 115a and the second relay 115b are sequentially supplied with power to the first target device 11a and the second target device 11b according to the charging priority order. For example, when the controller 13 sets the sequence corresponding to the first target device 11a in preference to the sequence corresponding to the second target device 11b, the controller 13 turns off the second relay 115b to stop the second target device 2b. The power is supplied, the conduction of the first relay 115a is maintained to continuously supply power to the first target device 2a to charge it, and the priority determination and setting are performed again after a certain period of time.

Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a charging device according to another embodiment of the present invention. As shown in FIG. 4, the charging device 1''' includes a power management circuit 11''', a controller 13, and a display 15, wherein the controller 13 is electrically connected to the power management circuit 11''' and the display 15. The power management circuit 11''' includes a plurality of power meters 111 and a plurality of relays 115. In FIG. 4, each power meter 111 is connected to three relays 115 as an example. However, the number of power meter 111 and relay 115 is not limited thereto. Like the charging device 1 in the embodiment shown in FIG. 1, when the charging device 1"' in the embodiment shown in FIG. 4 is in operation, the power management circuit 11"' is connected to the plurality of target devices 2 and the power supply. The power supply 3 is an AC power supply. In detail, the power management circuit 11''' is connected to the target device 2 in a one-to-one relationship through the relay 115, and is connected to the power supply 3 by the power meter 111 to obtain the power supply 3 to the target. Information on the power of the device 2 (i.e., the first and second input power information in the foregoing embodiments). In more detail, the power meter 111 can be built in the switching circuit of the foregoing embodiment to switchably acquire the input power information of the three target devices 2. In another example, the power meter 111 can also include three measuring units that respectively measure the input power information of the three target devices 2.

Further, in operation, the power management circuit 11''' is further connected to the second power supply 4. In detail, the second power supply 4 is a DC power supply that supplies DC power to each of the power meters 111 through the DC output 41a, and provides DC power to each of the relays 115 through the DC output 41b. Its operation. For example, the output power of the direct current output 41a has a voltage of 3.3 volts, and the output power of the direct current output 41b has a voltage of 12 volts.

As described above, the controller 13 is electrically connected to the power management circuit 11''' and the display 15. In detail, the controller 13 is electrically connected to each power measuring device 111 to extract the input power information measured by the power measuring device 111 to perform the foregoing charging sequencing, and the controller 13 is also electrically connected to each Relay 115 (e.g., via control line 135 having 12 pins) controls the power sequencing of each relay 115 based on the result of the charge sequencing (i.e., charging priority). The controller 13 is, for example, a microcontroller, and includes a storage medium 131 and a processing circuit 133. The storage medium 131 is, for example, a memory, and can record input power information of each target device 2 obtained from the power meter 111. The processing circuit 133 The rate of change of the input power information of each target device 2 is calculated to perform charging ordering.

In another embodiment, the storage medium 131 stores a charging characteristic of a battery of the same kind as the battery of the target device 2 (for example, having a similar charging curve or the same material), for example, is currently most commonly used for charging. The charging characteristics of the rechargeable battery of the device. In this embodiment, the processing circuit 133 can obtain a plurality of input power information of the input current associated with a target device 2 for a predetermined period of time from the power meter 111, and calculate a rate of change of the input power information. Then, based on the rate of change and the charging characteristic in the storage medium 131, the ratio of the amount of electricity of the target device 2 is judged, and the detailed content of the charging characteristic and the detailed determination method of the power ratio are described later. The display 15 is used to provide calculations and judgment results of the controller 13 by the outside world (for example, a user), and is a display known to those skilled in the art, and details are not described herein.

Referring to FIG. 1 , FIG. 5 and FIG. 6 , FIG. 5 is a flowchart of a charging sequencing method according to an embodiment of the invention; FIG. 6 is a charging characteristic according to an embodiment of the invention. Graph. The charging sorting method shown in FIG. 5 is applied to the charging device 1 shown in FIG. 1. In step S51, the power management circuit 11 of the charging device 1 obtains the first target device 2a associated with the input current for a predetermined period of time. The first input power information, and the second target device 2b is associated with the plurality of second input information of the input current during the preset time period. For example, the power management circuit 11 is pre-set with a preset time to obtain first and second input power information within a preset time. For another example, the power management circuit 11 can continuously obtain the first and second input power information, and the controller 13 is provided with a preset time to retrieve the first time from the power management circuit 11 within a preset time. The second input power information.

Next, in step S52, the controller 13 calculates a first rate of change of the first input power information and a second rate of change of the second input power information within the preset time. In detail, the first rate of change of the first input power information indicates the amount of change of the first input power information in a unit time, that is, the amount of change of the first input power information divided by the preset time in a preset time As a result, the second rate of change is equally achievable. In another embodiment, when the controller 13 sequentially acquires three input power information within a preset time, the controller 13 can calculate the first and second input power information of the input power information. The rate of change between the rate of change and the rate of change between the second and third input power information is then calculated as the average of the two rates of change. Similarly, the rate of change of more than three input power information can be obtained. In step S53, the controller 13 sets the charging priority order according to the first change rate and the second change rate, that is, the charging order of each target device, and the charging priority sequence includes the first order corresponding to the first target device 2a. And corresponding to the second sequence of the second target device 2b, where the first and second are independent of the order of the two.

In detail, FIG. 6 exemplarily shows an input electric power curve obtained after an experiment in a lithium battery which is generally applied to a rechargeable device, to represent charging characteristics of batteries of the first and second target devices 2a and 2b. The charging characteristic curve includes an instantaneous electric power curve C1 and a cumulative electric power curve C2. As shown in FIG. 6, when the cumulative electric power curve C2 rises initially (ie, when the battery starts charging from zero electric quantity), the slope of the instantaneous electric power curve C1 gradually decreases from the maximum value, and then the cumulative electric power curve C2 gradually becomes gentle (meaning) That is, the battery's power is gradually saturated), and the slope of the instantaneous electric power curve C1 turns to a negative value. From this, it can be seen that as the amount of power of the battery of the target device is gradually saturated, the rate of change of the electric power of the electric power input to the battery of the target device is gradually reduced. Therefore, the above-described charging sorting method can know the magnitude relationship between the electric quantities of the respective target devices by comparing the rate of change of the input electric power of each target device, and further the target device having a smaller electric quantity (ie, the larger rate of change) ) Set a more preferred order. In particular, the above embodiment is exemplified by the charging order of the first and second target devices 2a and 2b. However, the charging sequencing method provided by the present invention can also be applied to two or more target devices having the same battery characteristics. Sort of charge.

Please refer to FIG. 1 and FIG. 5 to FIG. 7 together. FIG. 7 is a flowchart of a charging sequencing method according to another embodiment of the present invention. For example, the charging sequencing method of FIG. 7 is implemented by using the architecture shown in FIG. 1. In step S71, the controller 13 obtains the target devices (ie, the first and second target devices 2a and 2b) through the power management circuit 11 in advance. A plurality of input power information associated with the input current is set in time. Then, the controller 13 determines the state of charge of each target device according to the input power information of each target device and a determination reference value, respectively. The controller 13 determines whether the average value of the input power information of the target device is as described in steps S72-S74. When the determination result is YES, the controller 13 determines that the target device is in the constant current charging mode; when the determination result is no, the controller 13 determines that the target device is in the constant voltage charging mode.

For example, as shown in the charging characteristic curve of FIG. 6, the entire charging process of the lithium battery includes a constant current charging phase CC and a constant voltage charging phase CV, wherein the two-stage dividing line corresponds to the instantaneous electric power curve C1 of approximately 20 watts. . According to this, the determination reference value is set to, for example, 20 watts. When the average value of the plurality of input electric powers of the target device is greater than or equal to 20 watts, it can be determined that the target device is in the constant current charging mode, and when the target device has multiple input electric powers When the average value is less than 20 watts, it is judged that the target device is in the constant voltage mode. By comparing the average value of the plurality of input electric powers with the determination reference value to determine the charging mode of the target device, it is possible to avoid a situation in which an error is determined by extracting an abnormal single input electric power (for example, a surge). In this embodiment, the controller 13 sets the charging sequence of the target device in the constant current mode to take precedence over the charging sequence of the target device in the constant voltage mode. For example, if the average value of the input electric power of the first target device 2a is the value of the point Pavg2 in FIG. 7 and the average value of the input electric power of the second target device 2b is the value of the point Pavg3, the controller 13 will judge the first A target device 2a is in a constant current charging mode and the second target device 2b is in a constant voltage charging mode, and the charging sequence of the first target device 2a is prioritized over the second target device 2b.

Further, as previously described, the charge sequencing method provided by the present invention can be used for charging sequencing of two or more target devices having the same battery characteristics. In this embodiment, in step S75, when the controller 13 determines that the number of target devices in the constant current charging mode is plural, the controller 13 performs input electric power on the target devices in the constant current charging mode. The comparison of the rate of change is performed to perform charging ordering, similar to step S53 in FIG. For example, as shown in FIG. 6, when the charging device 1 pairs the first target device 2a whose average value of the input electric power is the value of the point Pavg1, the second target device 2b having the value of the input electric power as the value of the point Pavg2, and When the third target device having the average value of the input electric power is the value of the point Pavg3, the controller 13 first determines that the average value of the input electric power of the third target device is less than the determination reference value of 20 watts, thereby determining the third target device. In the constant voltage charging mode, the average values of the input electric powers of the first and second target devices 2a and 2b are both greater than the determination reference value, so that it is determined that the first and second target devices 2a and 2b are in the constant current charging mode. Next, the controller 13 performs the charging sorting step described in step S53 of FIG. 5 on the first and second target devices 2a and 2b.

When the controller 13 determines that the number of target devices in the constant voltage charging mode is plural, in an embodiment, the controller 13 may further sort according to the magnitude of the input electric power of the target device. In detail, as shown in FIG. 6, in the constant voltage charging phase CV, the instantaneous input electric power of the battery decreases with the charging time, and therefore, the controller 13 can judge that the target device having the higher instantaneous input electric power has a higher The power ratio is based on which the charging sequence of the target device is set to the rear position. In another embodiment, the controller 13 no longer charges the target devices in the constant voltage charging mode and turns off the power supplied to the target device in the constant voltage charging mode, as described in step S76. In this way, when the charging device 1 is applied to a plurality of target devices, the target device may be classified according to the average value of the input power information and the determination reference value, and then the charging sequence may be performed according to the magnitude of the change rate of the input power information. Reduce the amount of computation required to perform charge sequencing.

Referring to FIG. 1 , FIG. 6 and FIG. 8 , FIG. 8 is a flowchart of a power detecting method according to an embodiment of the invention. In this embodiment, taking the power detection of the first target device 2a as an example, the controller 13 of the charging device 1 stores the charging characteristic curve shown in FIG. 6, the calculation formula corresponding to the charging characteristic curve, or Charging characteristics stored in other forms. In step S81, the controller 13 obtains, from the power management circuit 11, a plurality of input power information associated with the input current supplied from the power supply 3 to the first target device 2a by the first target device 2a for a preset time, and then calculating these Enter the rate of change of power information. Next, in step S82, the controller 13 determines the power ratio of the first target device 2a based on the calculated rate of change and the pre-stored charging characteristic curve.

For example, as shown in FIG. 6, the input power information is, for example, electric power. When the change rate value of the input power information of the first target device 2a calculated by the controller 13 is equal to the slope of the point Pavg1 of the instantaneous electric power curve C1, the corresponding To the cumulative electric power curve C2, at this time, the electric quantity ratio of the first target device 2a corresponds to the value of the point Pacc1 on the cumulative electric power curve C2 (about 40 watts), from which it is understood that the first target is compared with the final accumulated electric power of 1200 watts. The ratio of the amount of electricity of the device 2a was 3.33%. Similarly, for other examples, when the change rate value of the input power information of the first target device 2a is equal to the slope of the point Pavg2 on the instantaneous electric power curve C1, the power ratio of the first target device 2a can be obtained by the final accumulated electric power. It is calculated by the value of the point Pacc2 on the cumulative electric power curve C2, which is about 30%; and when the change rate value of the input power information of the first target device 2a is equal to the slope of the point Pavg3 on the instantaneous electric power curve C1, the first The power ratio of the target device 2a is about 83.33%.

In another embodiment, the controller 13 may pre-store the electricity rate conversion formula, and the controller 13 obtains the plurality of input power information of the target device within the preset time, because the input power information is corresponding to the power supply 3 The controller 13 can learn the accumulated power supplied from the power supply device 3 to the target device within a preset time period by using the accumulated value of the input power information, and obtain the electricity fee corresponding to the target device within a preset time period by using the electricity rate conversion formula. .

With the above structure, the charging device, the charging sequencing method and the power detecting method disclosed in the present invention obtain the AC power information transmitted from the power supply device to the target device through the power management circuit, and the plurality of AC power information and the rate of change thereof are used according to the AC power information and the rate of change thereof. The target device performs classification, charging sequencing and power detection. This method does not need to enter the target device to obtain power information, reduce the cost of the line setting, and simplify the charging sequencing process.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

1, 1', 1", 1" ‧ ‧ ‧ charging device

11, 11', 11", 11" ‧ ‧ ‧ power management circuits

13‧‧‧ Controller

2a‧‧‧first target device

2b‧‧‧second target device

3‧‧‧Power supply

111‧‧‧Power meter

113‧‧‧Switching circuit

115a‧‧‧First relay

115b‧‧‧Second relay

111a‧‧‧First Power Meter

111b‧‧‧second power meter

131‧‧‧Storage medium

133‧‧‧Processing Circuit

135‧‧‧Control line

2‧‧‧ Target device

4‧‧‧Second power supply

41a, 41b‧‧‧ DC output

115‧‧‧ Relay

C1‧‧‧ instantaneous power curve

C2‧‧‧ cumulative power curve

Pavg1～Pavg3, Pacc1～Pacc3‧‧‧

CC‧‧‧Constant current phase

CV‧‧ ‧ constant voltage stage

FIG. 1 is a schematic structural diagram of a charging apparatus according to an embodiment of the invention. FIG. 2 is a schematic structural diagram of a charging device according to an embodiment of the invention. FIG. 3 is a schematic structural diagram of a charging device according to another embodiment of the present invention. FIG. 4 is a schematic structural diagram of a charging device according to another embodiment of the present invention. FIG. 5 is a flowchart of a charging sequencing method according to an embodiment of the invention. FIG. 6 is a graph showing a charging characteristic according to an embodiment of the invention. FIG. 7 is a flow chart of a charging sequencing method according to another embodiment of the present invention. FIG. 8 is a flowchart of a method for detecting a power quantity according to an embodiment of the invention.

Claims (14)

A charging device includes: a power management circuit for connecting to a power supply, a first target device, and a second target device to obtain a plurality of input currents associated with the first target device for a predetermined period of time a first input power information, and obtaining a plurality of second input power information associated with the input current of the second target device within the preset time period; and a controller electrically connected to the power management circuit to calculate the a first rate of change of the first input power information and a second rate of change of the second input power information, and setting a charging priority according to the first rate of change and the second rate of change; wherein the charging priority includes Corresponding to a first sequence of the first target device and a second sequence corresponding to the second target device. The charging device of claim 1, wherein the controller determines that the first sequence priority is greater than the second sequence when determining that the first rate of change is greater than the second rate of change. The charging device of claim 1, wherein the controller further determines that the first target device is in a certain current charging mode when the average value of the first input power information is greater than or equal to a determination reference value, and When the average value of the first input power information is less than the determination reference value, determining that the first target device is in the constant voltage charging mode. The charging device of claim 1, wherein the power management circuit comprises a power meter, a switching circuit, a first relay and a second relay, the controller being electrically connected to the power meter, the first a relay and the second relay, the switching circuit is connected to the power meter, the first relay and the second relay, wherein the first and second relays are respectively connected to the first and second target devices, The power meter is connected to the power supply, and the first power information and the second power information are respectively obtained by the switching circuit. The charging device of claim 1, wherein the power management circuit comprises a first power meter, a first relay, a second power meter, and a second relay, the controller is electrically connected to the The first and second power measuring devices are electrically connected to the first and second relays, and the first and second power measuring instruments are electrically connected to the first and second relays, respectively, the first and the second The second power is used to connect to the first and second target devices, and the first power meter is configured to be disposed between the power supply and the first target device to obtain the first power information, and the The second power meter is configured to be disposed between the power supply and the second target device to obtain the second power information. The charging device of claim 4 or 5, wherein the controller further controls the first relay and the second relay to sequentially supply power to the first target device and the second target device according to the charging priority order. A charging sorting method includes: obtaining a plurality of first input power information associated with an input current by a first target device for a predetermined period of time, and obtaining a second target device associated with the input current during the preset time period a plurality of second input power information; the second target device calculates a first rate of change of the first input power information, and calculates a second rate of change of the second input power information; and according to the first rate of change and The second rate of change sets a charging priority sequence; wherein the charging priority sequence includes a first sequence corresponding to the first target device and a second sequence corresponding to the second target device. The charging sorting method of claim 7, wherein setting the charging priority according to the first rate of change and the second rate of change comprises setting the first order when the first rate of change is greater than the second rate of change Take precedence over the second order. The charging sequencing method of claim 7, further comprising determining, according to the first input power information and a determination reference value, that the first target device is in a certain voltage charging mode or a constant current charging mode, and according to the second inputs The power information and the determination reference value determine that the second target device is in the constant voltage charging mode or the constant current charging mode. The charging sorting method of claim 9, further comprising determining that the first target device is in the constant current charging mode when the average value of the first input power information is greater than or equal to the determining reference value, and when When the average value of the first input power information is less than the determination reference value, it is determined that the first target device is in the constant voltage charging mode. The charging sequencing method of claim 7, wherein the first input power information indicates an input electric power of the first target device, and the second input power information indicates an input electric power of the second target device. The charging sequencing method of claim 7, further comprising sequentially supplying power to the first target device and the second target device according to the charging priority order. The charging and sorting method of claim 7, further comprising obtaining an electricity fee corresponding to the first target device within the preset time according to the accumulated value of the first input power information and a power rate conversion formula. A method for detecting a quantity of electricity includes: obtaining a plurality of input power information associated with an input current by a target device for a predetermined period of time to calculate a rate of change of the input power information; and determining a rate of change according to the rate of change and a charging characteristic curve Determine the proportion of the power of the target device.