CN109254201B

CN109254201B - Electrical parameter metering method and device, charging equipment and storage medium

Info

Publication number: CN109254201B
Application number: CN201811086590.9A
Authority: CN
Inventors: 李建勇
Original assignee: Evtek Beijing Electronic Technology Co ltd
Current assignee: Evtek Beijing Electronic Technology Co ltd
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2021-04-09
Anticipated expiration: 2038-09-18
Also published as: CN109254201A

Abstract

The invention relates to an electrical parameter metering method, an electrical parameter metering device, charging equipment and a storage medium. The method comprises the following steps: acquiring the number of devices to be charged which are currently accessed into the charging device; the charging circuit comprises a charging branch circuit, a charging branch circuit and a charging control circuit, wherein the charging branch circuit is formed by one device to be charged and the charging circuit; according to the number of the devices to be charged, the power-on time of each charging branch is controlled in a time-sharing manner, so that the measured electrical parameters of each powered-on charging branch at different power-on moments are measured; acquiring the total electrical parameters of the charging equipment at different power-on moments; and calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch. The method improves the accuracy of the electrical parameter measurement.

Description

Electrical parameter metering method and device, charging equipment and storage medium

Technical Field

The invention relates to the electrical field, in particular to an electrical parameter metering method, an electrical parameter metering device, charging equipment and a storage medium.

Background

Along with the popularization of electric vehicles, the problem of electric vehicle charging is increasingly prominent, and charging stations provided in public places such as communities provide convenience for people.

Conventional charging station devices are typically multi-way charging stations, such as 8-way or 10-way, or even more. The charging mode of the charging station device is uniformly charged according to the charging time. However, the power of different electric vehicles is different, and the amount paid by the electric vehicle with more power consumption and the electric vehicle with less power consumption is the same in the same time length in the current charging mode.

In order to avoid the situation, each large charging pile or other charging equipment hopes to charge according to the actual consumed electric quantity, but when the charging station equipment is in multi-path charging, the current and/or power of each path measured at present are inaccurate due to crosstalk among the multiple paths, so that the finally calculated consumed electric quantity is also inaccurate.

Disclosure of Invention

In view of the above, it is necessary to provide an electrical parameter metering method, an electrical parameter metering device, a charging device, and a storage medium, which can accurately measure the actual power consumption of the charging device.

A method of electrical parameter metrology, comprising:

acquiring the number of devices to be charged which are currently accessed into the charging device; the charging circuit comprises a charging branch circuit, a charging branch circuit and a charging control circuit, wherein the charging branch circuit is formed by one device to be charged and the charging circuit;

according to the number of the devices to be charged, the power-on time of each charging branch is controlled in a time-sharing manner, so that the measured electrical parameters of each powered-on charging branch at different power-on moments are measured; acquiring the total electrical parameters of the charging equipment at different power-on moments; the total electrical parameter of the charging equipment at one power-on moment is equal to the sum of the actual electrical parameter of each powered-on charging branch at the power-on moment and the control electrical parameter on the control circuit in the charging equipment;

and calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch.

In one embodiment, the time-sharing controlling of the power-on time of each charging branch circuit according to the number of the devices to be charged to measure and obtain the measured electrical parameters of each powered-on charging branch circuit at different power-on times includes:

controlling one charging branch circuit to be powered on at the current power-on moment, and measuring to obtain the measured electrical parameters of all the powered-on charging branch circuits at the current power-on moment;

and controlling the other charging branch circuit to be electrified at the next electrifying moment, and measuring to obtain the measured electrical parameters of all electrified charging branch circuits at the next electrifying moment.

In one embodiment, the acquiring the total electrical parameters of the charging device at different power-on times includes:

when controlling the charging branch to be powered on at the current power-on moment, measuring the total electrical parameters of the charging equipment at the current power-on moment;

and at the next power-on moment, when controlling the other charging branch circuit to be powered on, measuring the total electrical parameters of the charging equipment at the next power-on moment.

In one embodiment, the calculating an electrical parameter correction amount on each charging branch according to the total electrical parameter, the control electrical parameter on the control circuit, and the measured electrical parameter on each powered charging branch at the different power-on time includes:

if the current power-on time is the initial power-on time, taking a first charging branch which triggers power-on at the initial power-on time as a reference branch, and obtaining a reference electrical parameter on the reference branch;

subtracting the difference value between the reference electrical parameters from the total electrical parameters of the charging equipment at the initial power-on time to determine the total electrical parameters as the control electrical parameters of the control circuit;

and calculating the correction quantity of the electrical parameters on each charging branch according to the control electrical parameters, the reference electrical parameters, the total electrical parameters of the charging equipment at each candidate power-on time after the initial power-on time and the measured electrical parameters on each powered-on charging branch at different candidate power-on times.

In one embodiment, the calculating an electrical parameter correction amount on each charging branch according to the control electrical parameter, the reference electrical parameter, the total electrical parameter of the charging device at each candidate power-on time after the initial power-on time, and the measured electrical parameter on each powered-on charging branch at the different candidate power-on times includes:

acquiring a first measured electrical parameter of the first charging branch at a next candidate power-on time of the initial power-on time, and calculating to obtain an electrical parameter correction quantity of the first charging branch according to the reference electrical parameter and the first measured electrical parameter;

and calculating the correction quantity of the electrical parameters of the charging branch which triggers power-on at each candidate power-on time according to the control electrical parameters, the measured electrical parameters of each powered-on charging branch at each candidate power-on time, the total electrical parameters of the charging equipment at different candidate power-on times and the correction quantity of the electrical parameters obtained before each candidate power-on time.

In one embodiment, the calculating, according to the control electrical parameter, the measured electrical parameter of each powered-on charging branch at each candidate power-on time, the total electrical parameter of the charging device at different candidate power-on times, and the electrical parameter correction amount obtained before each candidate power-on time, the electrical parameter correction amount of the charging branch triggered to be powered on at each candidate power-on time includes:

according to

Calculating the electrical parameter correction quantity delta E of the nth charging branch triggered to be powered on at the current candidate power-on moment_n；

Wherein, E is_TThe total electrical parameters of the charging equipment at the current candidate power-on time are obtained; said E₀Is the control electrical parameter; said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrifying moment; the Δ E_iCorrecting the electrical parameter on the ith charging branch before the current candidate power-on time; and n is greater than or equal to 2.

In one embodiment, the calculating an actual electrical parameter on each charging branch according to the electrical parameter correction amount on each charging branch and the measured electrical parameter on each charging branch includes:

at the current power-on moment, acquiring the measured electrical parameters on each powered-on charging branch;

and determining the sum of the measured electrical parameters on the charging branch and the corresponding electrical parameter correction amount as the actual electrical parameters of the charging branch at the current power-on moment.

if the current power-on time is the initial power-on time, subtracting a difference value between the measured electrical parameters of the charging branch which triggers power-on at the initial power-on time from the total electrical parameters of the charging equipment at the initial power-on time, and determining the difference value as the control electrical parameters of the control circuit;

the method comprises the steps of obtaining the sum of measured electrical parameters of all charged branches which are electrified at a candidate electrifying moment after an initial electrifying moment, and obtaining the ratio of the measured electrical parameters of each charged branch which is electrified at the candidate electrifying moment to the sum of the measured electrical parameters;

and calculating to obtain the correction quantity of the electrical parameters on each electrified charging branch according to the total electrical parameters of the charging equipment at the current candidate electrifying time, the control electrical parameters, the measured electrical parameters on each electrified charging branch at the current candidate electrifying time and the ratio.

In one embodiment, the calculating, according to the total electrical parameter of the charging device at the current candidate power-on time, the control electrical parameter, the measured electrical parameter of each charging branch that has been powered on at the current candidate power-on time, and the ratio, to obtain the correction amount of the electrical parameter of each charging branch that has been powered on includes:

according to

Calculating the correction quantity delta E of the electrical parameters on the ith charged branch_i；

Wherein, R is_iIn the ratio of E to_TIs a current candidateThe total electrical parameters of the charging equipment are determined at the power-on time; said E₀For said control of electrical parameters, said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrification time are obtained; and n is greater than or equal to 2.

In one embodiment, the electrical parameter comprises current and/or power.

An electrical parameter metering device comprising:

the acquisition module is used for acquiring the number of the devices to be charged which are currently accessed into the charging device; the charging circuit comprises a charging branch circuit, a charging branch circuit and a charging control circuit, wherein the charging branch circuit is formed by one device to be charged and the charging circuit;

the control module is used for controlling the power-on time of each charging branch in a time-sharing manner according to the number of the devices to be charged so as to measure and obtain the measured electrical parameters of each powered-on charging branch at different power-on moments; acquiring the total electrical parameters of the charging equipment at different power-on moments; the total electrical parameter of the charging equipment at one power-on moment is equal to the sum of the actual electrical parameter of each powered-on charging branch at the power-on moment and the control electrical parameter on the control circuit in the charging equipment;

and the determining module is used for calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch.

A charging apparatus comprising a memory and a processor, the memory storing a computer program that when executed by the processor performs the steps of:

and calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch. A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:

According to the electrical parameter metering method, the electrical parameter metering device, the charging equipment and the storage medium, the number of the equipment to be charged which is currently connected to the charging equipment is obtained, wherein one equipment to be charged and one charging circuit form a charging branch; further controlling the power-on time of each charging branch in a time-sharing manner according to the number of the devices to be charged, so as to measure and obtain measured electrical parameters of each powered-on charging branch at different power-on moments and obtain total electrical parameters of the charging device at different power-on moments, wherein the total electrical parameters of the charging device at one power-on moment are equal to the sum of actual electrical parameters of each powered-on charging branch at the one power-on moment and control electrical parameters on a control circuit in the charging device; and then calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch. Therefore, when the charging station equipment is in multi-path charging, due to crosstalk among the multiple paths, a certain deviation exists between the measured current and/or power of each path and the actual current and/or power, the accurate actual consumed electric quantity can be calculated by calculating the deviation value and combining the measured value, and the accurate actual consumed electric quantity can be calculated based on the accurate actual current and/or power, so that charging can be carried out according to the accurate actual consumed electric quantity, the electric vehicles with more consumed electric quantity pay more money, the electric vehicles with less consumed electric quantity pay less money, and the use experience of users is improved.

Drawings

FIG. 1 is a diagram of a charging system architecture in one embodiment;

FIG. 2 is a schematic flow chart diagram of a method for electrical parameter metrology in one embodiment;

FIG. 2A is a schematic diagram of an electrical parameter measurement circuit in one embodiment;

FIG. 3 is a schematic flow chart diagram of a method for electrical parameter metrology in one embodiment;

FIG. 4 is a schematic flow chart diagram of a method for electrical parameter metrology in one embodiment;

FIG. 5 is a schematic flow chart diagram of a method for electrical parameter metrology in one embodiment;

FIG. 6 is a schematic diagram of an electrical parameter measurement apparatus in one embodiment;

FIG. 7 is a schematic diagram of an electrical parameter measurement apparatus in one embodiment;

FIG. 8 is a schematic diagram of an electrical parameter measurement apparatus in one embodiment;

fig. 9 is a schematic diagram of the internal structure of the charging device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The electrical parameter metering method provided by the application can be applied to the charging system architecture shown in fig. 1. As shown in fig. 1, the charging system includes: a device to be charged 101, a charging device 102, and a client device 104. Optionally, a server 103 may also be included.

During specific operation, the device to be charged 101 is connected to the charging device 102 for charging, and the charging device 102 measures the actual consumed electric quantity of the device to be charged 101 and charges the client device 104 according to the actual consumed electric quantity. Optionally, the device to be charged may further send the actual consumed electric quantity and the charging condition to the server 103 through a network, so that the server 103 pushes the actual consumed electric quantity and the charging condition to the client device 104.

It should be noted that the charging device related to this embodiment is a device for providing electric energy to a device to be charged, and may be a charging pile, a charger, a charging cabinet, a charger, a charging station, and the like, which is not limited in this embodiment. The charging device has multiple charging branches. Optionally, the device to be charged may be a battery car, an electric vehicle, a shared trolley car, a charging battery, an electric energy board, an electric energy storage device, and the like, and this embodiment does not limit this. Optionally, the client device may be a device such as a mobile phone and a computer, which is not limited in this embodiment. Alternatively, the charging device 102 may correspond to a plurality of devices to be charged 101. Alternatively, the server 103 may manage data of a plurality of charging devices 102. For example, the server may implement management and storage of charging device data when multiple charging devices are located in different cells.

The method, the apparatus, the charging device, and the storage medium for measuring electrical parameters provided by this embodiment are intended to solve the problem in the conventional art that when a charging station device is charged in multiple paths, the actual power consumption of the device to be charged cannot be accurately measured due to crosstalk between the multiple paths, and how to solve this problem is specifically described below with specific embodiments.

It should be noted that the execution subject of the method embodiments described below may be an electrical parameter metering device, which may be implemented by software, hardware, or a combination of software and hardware as part or all of the charging apparatus described above. The following method embodiments are described taking as an example the execution subject is a charging device.

Fig. 2 is a schematic flow chart of an electrical parameter measurement method according to an embodiment. The embodiment relates to a specific process that the charging device calculates the correction quantity of the electrical parameter on each charging branch, and then calculates the actual electrical parameter on each charging branch according to the correction quantity of the electrical parameter on each charging branch and the measured electrical parameter on each charging branch. Taking the example that the method is applied to the charging system in fig. 1 as an example, as shown in fig. 2, the method includes the following steps:

s101, acquiring the number of devices to be charged which are currently accessed to a charging device; wherein, a charging branch is formed by one device to be charged and one charging circuit.

It should be noted that, in this embodiment, the number of the to-be-charged devices currently connected to the charging device is not limited, as long as the total number of the charging branches formed by the charging circuit of the to-be-charged device does not exceed the maximum number of the charging branches provided by the charging device.

Optionally, the charging device may obtain the number of devices to be charged currently accessed to the charging device through a control algorithm in the charging device. Optionally, the charging device may further obtain the number of devices to be charged currently connected to the charging device in a manner of user input through the human-computer interaction interface. The embodiment does not limit the specific manner how the charging device obtains the number of the devices to be charged currently connected to the charging device.

S102, controlling the power-on time of each charging branch in a time-sharing manner according to the number of the devices to be charged so as to measure and obtain measured electrical parameters on each powered charging branch at different power-on moments; acquiring the total electrical parameters of the charging equipment at different power-on moments; the total electrical parameter of the charging device at one power-on moment is equal to the sum of the actual electrical parameter of each powered-on charging branch at the power-on moment and the control electrical parameter on the control circuit in the charging device.

Specifically, after the charging device obtains the number of the devices to be charged, the charging time of each charging branch is controlled in a time-sharing manner, so that the measured electrical parameters of each charged charging branch at different charging moments are measured; and acquiring the total electrical parameters of the charging equipment at different power-on moments. Optionally, the electrical parameter may include current and/or power.

The time-sharing control of the power-on time of each charging branch is actually used to control each charging branch to be powered on at different power-on times, and optionally, the time-sharing control of the power-on time may be: at the current power-on moment, the charging equipment controls one charging branch to be powered on, and the measured electrical parameters of all the powered-on charging branches at the current power-on moment are measured and obtained, and in addition, the total electrical parameters of the charging equipment at the current power-on moment can also be measured and obtained; the measured electrical parameters are parameters such as current and/or power measured by a measuring device such as a multimeter. And then, controlling the other charging branch circuit to be powered on at the next power-on moment, measuring to obtain the measured electrical parameters of all the powered-on charging branch circuits at the next power-on moment, and measuring the total electrical parameters of the charging equipment at the next power-on moment. Alternatively, the charging device may obtain the total electrical parameter by one measurement. Optionally, the charging device may further obtain the total electrical parameter by performing multiple measurements and then averaging according to results of the multiple measurements. The total electrical parameter of the charging device at one power-on moment is equal to the sum of the actual electrical parameter of each powered-on charging branch at the power-on moment and the control electrical parameter on the control circuit in the charging device. For example, as shown in fig. 2A, at a power-on time, two charging branches are powered on, and the two charging branches are a 1 st charging branch and a 2 nd charging branch, respectively, and at this time, the total current obtained by the total amount circuit of the charging device is equal to the sum of the actual current of the 1 st charging branch, the actual current of the 2 nd charging branch, and the control current on the control circuit.

It should be noted that the numbers 1 st way, 2 nd way through nth way of the charging branch shown in fig. 2A are only used to explain the charging branch involved in the present embodiment. Optionally, when the power is actually controlled to be powered on, any one of the charging branches may be selected as a 1 st powered-on charging branch, a 2 nd powered-on charging branch, and an nth powered-on charging branch, which is not limited in this embodiment.

Optionally, the charging device may obtain the corresponding measured electrical parameter through one measurement. Optionally, the charging device may further obtain the corresponding measured electrical parameter by measuring for multiple times and then taking an average value according to results of the multiple measurements.

S103, calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch.

Specifically, the charging device calculates the correction amount of the electrical parameter on each charging branch according to the total electrical parameter, the control electrical parameter and the measured electrical parameter on each charged charging branch at different charging moments.

Optionally, at the current power-on time, if only one powered-on charging branch is assumed, the charging device may determine that the electrical parameter correction amount of the charging branch at the current power-on time is zero.

Optionally, at the current power-on time, if two or more charged branches are assumed, the charging device may calculate the correction amount of the electrical parameter on each charged branch according to the total electrical parameter corresponding to the current power-on time and the last power-on time, the control electrical parameter on the control circuit, and the change between the measured electrical parameters on each charged branch.

Optionally, the charging device may further calculate the correction amount of the electrical parameter on each charging branch according to the ratio of the control electrical parameter at different power-on times and the measured electrical parameter on each powered-on charging branch to the total electrical parameter.

In this embodiment, a specific implementation manner of how to calculate the correction amount of the electrical parameter on each charging branch by the charging device according to the total electrical parameter, the control electrical parameter, and the measured electrical parameter on each charged charging branch at different charging times is not limited.

Further, specifically, the charging device may calculate the actual electrical parameter on each charging branch according to the electrical parameter correction amount on each charging branch and the measured electrical parameter on each charging branch. Optionally, the charging device may use the sum of the correction amount of the electrical parameter on each charging branch and the measured electrical parameter on each corresponding charging branch as the actual electrical parameter on each corresponding charging branch. Optionally, the charging device may further multiply the electrical parameter correction amount on each charging branch by a certain weighting factor to obtain a product value, calculate a sum of the product value and the corresponding measured electrical parameter on each charging branch, and use the sum as the actual electrical parameter on each corresponding charging branch, where the weighting factor may be related to a ratio of the measured electrical parameter on each corresponding charging branch to the total electrical parameter.

In this embodiment, a specific implementation manner of how the charging device calculates the actual electrical parameter on each charging branch according to the correction amount of the electrical parameter on each charging branch and the measured electrical parameter on each charging branch is not limited.

In the embodiment of the invention, the charging equipment calculates the electrical parameter correction quantity of each charging branch by controlling each charging branch to be electrified in a time-sharing manner, acquiring the total electrical parameter of the charging equipment at different electrifying moments, acquiring the measured electrical parameter of each electrified charging branch at different electrifying moments and the control electrical parameter on the control circuit, wherein the electrical parameter correction quantity represents the deviation between the measured electrical parameter of each charging branch and the actual electrical parameter caused by crosstalk among multiple paths, so that the accurate actual electrical parameter on the corresponding charging branch can be obtained on the basis of the electrical parameter correction quantity and the measured electrical parameter on the corresponding charging branch, namely, the crosstalk among the multiple paths is overcome, and the accuracy of the measured value of the current and/or the power of the charging branch is improved; and then based on this accurate electric current and/or power, alright calculate accurate actual power consumption to can carry out accurate charge according to this accurate actual power consumption, and then promoted user's use and experienced.

In addition, in the conventional technology, because charging is performed according to time, a plurality of devices to be charged are not allowed to be connected to one charging branch, for example, assuming that the rated current of one charging branch of the charging device is 50A/h, the charging current of one electric vehicle is 20A/h, and the charging current of one electric vehicle is 10A/h, although the total charging current when two electric vehicles are simultaneously charged is 30A/h, and the total charging current 30A/h is within the rated current of the charging branch, because charging is performed according to time, the charging branch is not allowed to be connected to the two electric vehicles at the same time, and the application range of the charging device is limited. And when accurate charging is carried out based on accurate actual consumed electric quantity in the invention, but charging is not carried out according to time, the charging branch is allowed to be simultaneously connected into the two electric vehicles. That is, as long as the actual current and/or power on one charging branch does not exceed the rated current and/or power on the charging branch, multiple devices to be charged can be allowed to be connected to the charging branch. Therefore, the problem that a plurality of devices to be charged are not allowed to be accessed to one charging branch due to charging according to time in the prior art is solved, and the application range of the charging device is further expanded.

On the other hand, the measurement of the total electrical parameters is not influenced by the crosstalk of each charging branch, so that the total power consumption of the charging equipment can be accurately known according to the total electrical parameters, and convenience is provided for later-stage operation cost accounting. Fig. 3 is a flowchart illustrating an electrical parameter measurement method according to an embodiment. The present embodiment relates to a process of calculating, by the charging device, an electrical parameter correction amount on each charging branch circuit according to the total electrical parameter, the control electrical parameter on the control circuit, and the measured electrical parameter on each charged charging branch circuit at the different charging times. On the basis of the above embodiment, as shown in fig. 3, the above S103 may include the following steps:

s201: and if the current power-on time is the initial power-on time, taking the first charging branch which triggers power-on at the initial power-on time as a reference branch, and obtaining a reference electrical parameter on the reference branch.

Specifically, if all the charging branches are not powered up before the current power-up time, the current power-up time is considered as the initial power-up time. Therefore, the charging device takes the charging branch which triggers power-on at the initial power-on time as a first charging branch, takes the first charging branch as a reference branch, measures the measured electrical parameter on the reference branch, and takes the measured electrical parameter of the reference branch as a reference electrical parameter. Alternatively, the charging device may obtain the reference electrical parameter by one measurement. Optionally, the charging device may further obtain the reference electrical parameter by performing multiple measurements and then taking an average value according to results of the multiple measurements.

The embodiment does not limit the specific implementation manner of how the charging device obtains the reference electrical parameter on the reference branch.

S202: and subtracting the difference value between the reference electrical parameters from the total electrical parameters of the charging equipment at the initial power-on time to determine the total electrical parameters as the control electrical parameters of the control circuit.

Specifically, at the initial power-on time, the total electrical parameter of the charging device is equal to the sum of the reference electrical parameter on the reference branch at the initial power-on time and the consumed control electrical parameter on the control circuit in the charging device, so that the charging device calculates the total electrical parameter minus the reference electrical parameter to obtain a difference value, and the difference value is used as the control electrical parameter of the control circuit.

In one embodiment, at the initial power-up time, the total current of the charging device is I_TThe reference current on the reference branch is I_CBy use of I_TSubtract I_CObtaining a control current I for controlling the consumption of the circuit₀。

S203: and calculating the correction quantity of the electrical parameters on each charging branch according to the control electrical parameters, the reference electrical parameters, the total electrical parameters of the charging equipment at each candidate power-on time after the initial power-on time and the measured electrical parameters on each powered-on charging branch at different candidate power-on times.

Specifically, the candidate power-on time in this embodiment is a time after the initial power-on time. After the charging device obtains the reference electrical parameter and the control electrical parameter, at a candidate power-on time, when two or more charging branches are in a power-on state, the charging device may calculate an electrical parameter correction amount on the charging branch triggering power-on at the candidate power-on time through the control electrical parameter, the reference electrical parameter, a total electrical parameter of the charging device at the candidate power-on time, and a measured electrical parameter on each powered-on charging branch at the candidate power-on time. For example, as shown in FIG. 2AAssuming the 1 st charging branch as a reference branch, when the charging device obtains a reference current I of the reference branch_CAnd control the current I₀Then, at a candidate power-on time, two charging branches are in a power-on state, the two charging branches are a 1 st charging branch and a 2 nd charging branch, and the 2 nd charging branch is a charging branch which triggers power-on at the candidate power-on time; the total current of the charging equipment at the candidate power-on time is I_T2The measured current of the 1 st charging branch is I_1C2The measured current of the 2 nd charging branch circuit is I_2C2(ii) a The charging equipment can pass through I₀、I_C、I_T2、I_1C2And I_2C2And calculating the current correction quantity of the 2 nd charging branch at the candidate power-on time.

Optionally, at a candidate power-on time, the charging device may first calculate the electrical parameter correction amount of the reference branch according to the measured electrical parameter of the reference branch measured at the candidate power-on time and the reference electrical parameter (i.e., the measured electrical parameter of the reference branch at the initial power-on time). Optionally, at the candidate power-on time, the charging device may further calculate, according to the control electrical parameter, the electrical parameter correction amount of the reference branch, the measured electrical parameter of each powered-on charging branch at the candidate power-on time, and the total electrical parameter at the candidate power-on time, the electrical parameter correction amount of the charging branch triggered to be powered-on at the candidate power-on time. For example, as shown in fig. 2A, assuming that the 1 st charging branch is a reference branch, when the charging device obtains a reference current I of the reference branch_CAnd control the current I₀Then, at a candidate power-on time, two charging branches are in a power-on state, the two charging branches are a 1 st charging branch and a 2 nd charging branch, and the 2 nd charging branch is a charging branch which triggers power-on at the candidate power-on time; the total current of the charging equipment at the candidate power-on time is I_T2The measured current of the 1 st charging branch is I_1C2The measured current of the 2 nd charging branch circuit is I_2C2(ii) a The charging device may first be according to I_1C2And Ic, calculate the reference branch (i.e., way 1)Charging branch) current correction amount Δ I₁(ii) a At this candidate power-on time, the charging device may further be according to I₀、ΔI₁、I_1C2、I_2C2And I_T2Calculating the current correction quantity delta I of the 2 nd charging branch₂。

Optionally, at a candidate power-on time, the charging device may further calculate an electrical parameter correction amount of the charging branch triggered to be powered on at the candidate power-on time according to the control electrical parameter and a ratio of the measured electrical parameters of each charging branch powered on at the candidate power-on time to the total electrical parameters at the candidate power-on time.

The embodiment does not limit the specific implementation manner of how the charging device calculates the electrical parameter correction amount on each charging branch.

S204: and calculating the actual electrical parameters on each charging branch according to the electrical parameter correction quantity on each charging branch and the measured electrical parameters on each charging branch.

Specifically, after obtaining the electrical parameter correction amount on each charging branch, the charging device obtains the measured electrical parameter on each charging branch, and then calculates the actual electrical parameter on each charging branch according to the electrical parameter correction amount on each charging branch and the measured electrical parameter on each charging branch.

Optionally, at the current power-on time, the charging device may obtain the measured electrical parameter on each powered-on charging branch circuit by measurement, and then, the charging device may use the sum of the correction amount of the electrical parameter on each charging branch circuit and the measured electrical parameter on each corresponding charging branch circuit as the sum of the correction amount of the electrical parameter on each corresponding charging branch circuitThe actual electrical parameter of (a). For example, as shown in fig. 2A, at the current power-on time, there are 3 powered-on charging branches, which are respectively a 1 st charging branch, a 2 nd charging branch and a 3 rd charging branch; the current correction quantity of the 1 st charging branch is delta I₁The current correction of the 2 nd charging branch is Δ I₂The current correction of the 3 rd charging branch is Δ I₃(ii) a The charging equipment obtains the measured current I of the 1 st charging branch at the current power-on time through measurement_1C3And the measured current I of the 2 nd charging branch_2C3And the measured current I of the 3 rd charging branch_3C3(ii) a The charging device may then couple I_1C3And Δ I₁The sum of which is the actual current of the 1 st charging branch, will I_2C3And Δ I₂The sum of which is the actual current of the 2 nd charging branch, will I_3C3And Δ I₃And the sum is used as the actual current of the first charging branch.

In the embodiment of the invention, when the current power-on time is the initial power-on time, only the first charging branch is in a power-on state, at this time, the problem of crosstalk among multiple paths does not exist, and the measured electrical parameter on the first charging branch and the actual electrical parameter have no deviation, so that the charging equipment takes the first charging branch as a reference branch and takes the measured electrical parameter on the reference branch as a reference electrical parameter. Because of the accuracy of the reference electrical parameter, the accurate control electrical parameter of the control circuit can be obtained according to the accurate reference electrical parameter and the total electrical parameter. Further, at each candidate power-on time after the initial power-on time, a plurality of charging branches are in a power-on state, and an accurate correction amount of the electrical parameter on each charging branch is obtained based on the accurate reference electrical parameter, the control electrical parameter, the total electrical parameter and the measured electrical parameter on each powered-on charging branch at each candidate power-on time. The electrical parameter correction quantity represents the deviation between the measured electrical parameters of the charging branches and the actual electrical parameters caused by the crosstalk among the multiple paths, so that more accurate actual electrical parameters on the corresponding charging branches can be obtained based on the accurate electrical parameter correction quantity and the measured electrical parameters on the corresponding electrified charging branches at the candidate electrifying moment, namely, the crosstalk among the multiple paths is overcome, and the accuracy of the measured values of the current and/or the power of the charging branches is improved; and then based on this accurate electric current and/or power, alright calculate accurate actual power consumption to can carry out accurate charge according to this accurate actual power consumption, and then promoted user's use and experienced.

Fig. 4 is a flowchart illustrating an electrical parameter measurement method according to an embodiment. The present embodiment relates to a process of calculating the correction amount of the electrical parameter on each charging branch by the charging device. On the basis of the above embodiment, as shown in fig. 4, the above S103 may include the following steps:

s301, acquiring a first measured electrical parameter of the first charging branch circuit at a next candidate power-on time of the initial power-on time, and calculating to obtain an electrical parameter correction quantity of the first charging branch circuit according to the reference electrical parameter and the first measured electrical parameter.

Specifically, at the next candidate power-on time (assumed as T2) of the initial power-on time (assumed as T1), the charging device obtains a first measured electrical parameter of the first charging branch at the candidate power-on time (the first charging branch is the reference branch), and further calculates an electrical parameter correction amount of the first charging branch according to the first measured electrical parameter and the reference electrical parameter.

The method specifically comprises the following steps: the charging device may use a difference between the reference electrical parameter and the first measured electrical parameter as the electrical parameter correction amount for the first charging branch. For example, it is known that at time T1, the reference current of the first charging branch is Ic; at a time T2, the charging device obtains a measured current I of the first charging branch at a time T2_1C2Then, the current correction amount Δ I of the first charging branch₁＝Ic-I_1C2。

S302, calculating the correction quantity of the electrical parameters of the charging branch which triggers power-on at each candidate power-on time according to the control electrical parameters, the measured electrical parameters of each powered-on charging branch at each candidate power-on time, the total electrical parameters of the charging equipment at different candidate power-on times and the correction quantity of the electrical parameters obtained before each candidate power-on time.

Specifically, taking a candidate power-on time (assumed as T3) as an example, after obtaining the measured electrical parameters on each powered-on charging branch at the candidate power-on time and the total electrical parameters of the charging device at the candidate power-on time, the charging device calculates the electrical parameter correction amount of the charging branch triggered to be powered on at the candidate power-on time, by combining the control electrical parameters and the electrical parameter correction amount obtained before the candidate power-on time.

For example, assume that T1 is the initial power-up time, T2 is the candidate power-up time adjacent to T1, and T3 is the candidate power-up time adjacent to T2.

At the time T1, only the 1 st charging branch is in the power-on state;

at time T2, there are 2 charged charging branches, which are respectively the 1 st charging branch and the 2 nd charging branch; then, the 2 nd charging branch is the charging branch which triggers power-on at time T2; the control current is known as I₀(ii) a According to the above-mentioned examples, it is known that Δ I is obtained₁＝Ic-I_1C2(ii) a The charging equipment obtains the measured current I of the 1 st charging branch at the moment T2 through measurement_1C2And the measured current I of the 2 nd charging branch_2C2(ii) a And obtaining the total current I of the charging equipment at the time T2 through measurement_T2(ii) a Then, the charging device is according to I₀、I_1C2、I_2C2、I_T2And Δ I₁(the.DELTA.I₁I.e. the electrical parameter correction obtained before the candidate power-on time T2), calculating the current correction Δ I of the 2 nd charging branch₂＝I_T2-I₀-(I_1C2+I_2C2)-ΔI_1。

Similarly, at time T3, there are 3 charged charging branches, which are the 1 st charging branch, the 2 nd charging branch and the 3 rd charging branch, respectively, and then the 3 rd charging branch is the charging branch triggered to be charged at time T3; the control current is known as I₀(ii) a Known at T3The current correction quantity of the 1 st charging branch obtained before the moment is delta I₁The current correction quantity of the 2 nd charging branch is delta I₂(the.DELTA.I₁And Δ I₂I.e., the correction amount of the electrical parameter obtained before the candidate power-on time T3); the charging equipment obtains the measured current I of the 1 st charging branch at the moment T3 through measurement_1C3And the measured current I of the 2 nd charging branch_2C3And the measured current I of the 3 rd charging branch_3C3And obtaining the total current I of the charging equipment at the T3 moment through measurement_T3(ii) a Then, the charging device is according to I₀、I_1C3、I_2C3、I_3C3、I_T3、ΔI₁And Δ I₂And calculating to obtain the current correction quantity delta I of the 3 rd charging branch₃(ΔI₃The corresponding charging branch is the 3 rd charging branch).

Based on the method, the correction quantity of the electrical parameters of the charging branch triggered to be powered on at each candidate power-on moment can be obtained.

Alternatively, the charging device may be based on

Or the modification of the formula, calculating the correction quantity delta E of the electrical parameter of the nth charging branch triggering the power-on at the current candidate power-on moment_n. Wherein, E is_TThe total electrical parameters of the charging equipment at the current candidate power-on time are obtained; said E₀Is the control electrical parameter; said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrifying moment; the Δ E_iCorrecting the electrical parameter on the ith charging branch before the current candidate power-on time; and n is greater than or equal to 2.

As can be seen from the above description, at the next candidate power-on time of the initial power-on time, due to the multi-path crosstalk, for the first charging branch, the first measured electrical parameter at the candidate power-on time may deviate from the actual electrical parameter, and based on the first charging branch obtained at the initial power-on time in the above embodimentIt can be seen that the deviation also represents a deviation between the first measured electrical parameter at the candidate power-on time and the reference electrical parameter, and therefore, the charging device calculates a more accurate electrical parameter correction amount of the first charging branch according to the accurate reference electrical parameter and the first measured electrical parameter of the first charging branch at the candidate power-on time. Then, at the candidate power-on time, the charging device further corrects the amount according to the electrical parameter of the first charging branch, and then calculates a more accurate electrical parameter correction amount of the charging branch triggered to be powered on at the candidate power-on time by combining the measured electrical parameter on each powered-on charging branch at the candidate power-on time, the total electrical parameter of the charging device at the candidate power-on time, and the control electrical parameter. And at the next candidate electrifying time after the candidate electrifying time, the charging equipment calculates the electrical parameter correction quantity of the charging branch triggered to be electrified at the next candidate electrifying time according to the more accurate electrical parameter correction quantity obtained before the next candidate electrifying time. It can be seen that this is a time-sharing power-on and iterative computation process, taking fig. 2A as an example, first at an initial power-on time, triggering the 1 st charging branch to power on; further triggering the 2 nd charging branch to be powered on at the next candidate power-on time of the initial power-on time, and calculating to obtain the electrical parameter correction quantity of the 1 st charging branch; then, calculating the correction quantity of the electrical parameters of the 2 nd charging branch according to the correction quantity of the electrical parameters of the 1 st charging branch; and then triggering the 3 rd charging branch to be electrified at the next candidate electrifying moment, and obtaining the electrical parameter correction quantity of the 3 rd charging branch which is newly triggered to be electrified according to the previously obtained electrical parameter correction quantity of the 1 st charging branch and the electrical parameter correction quantity of the 2 nd charging branch. Namely, at a candidate power-on time, one charging branch is triggered to be powered on at a time, and the electrical parameter correction quantity of the charging branch which is triggered to be powered on at this time is calculated according to the electrical parameter correction quantity obtained before the candidate power-on time. Based on the accuracy of the electrical parameter correction quantity obtained before the candidate power-on time, the electrical parameter correction quantity of the charging branch which is triggered to be powered on at the current candidate power-on time is correctedThe positive quantities are more accurate. Further, based on the accurate correction amount of the electrical parameter of each path, the corresponding charging branch can be obtained (for example, in the above example, the current correction amount Δ I of the 3 rd charging branch is calculated₃I.e. Delta I₃The corresponding charging branch is the 3 rd charging branch), so that the crosstalk among multiple paths is overcome, and the accuracy of the measured value of the current and/or power of the charging branch is improved; and then based on this more accurate electric current and/or power, alright calculate more accurate actual power consumption to can carry out accurate charge according to this more accurate actual power consumption, very big promotion user's use experience.

Fig. 5 is a flowchart illustrating an electrical parameter measurement method according to an embodiment. The present embodiment relates to another process of calculating, by the charging device, the correction amount of the electrical parameter on each charging branch circuit according to the total electrical parameter, the control electrical parameter on the control circuit, and the measured electrical parameter on each charged charging branch circuit at different charging times. On the basis of the above embodiment, as shown in fig. 5, the above S103 may include the following steps:

s401, if the current power-on time is the initial power-on time, subtracting the difference value between the measured electrical parameters of the charging branch triggered to be powered on at the initial power-on time from the total electrical parameters of the charging equipment at the initial power-on time, and determining the difference value as the control electrical parameters of the control circuit.

Specifically, at the initial power-on time, the total electrical parameter of the charging device is equal to the sum of the measured electrical parameter of the charging branch triggering power-on at the initial power-on time and the consumed control electrical parameter of the control circuit in the charging device, so that the charging device calculates the difference between the measured electrical parameter of the charging branch triggering power-on at the initial power-on time and the total electrical parameter, and uses the difference as the control electrical parameter of the control circuit.

In one embodiment, at the initial power-up time, the total current of the charging device is I_TThe measurement current of the charging branch circuit triggering power-on at the initial power-on moment is I_cBy use of I_TSubtract I_cObtaining a control current I for controlling the consumption of the circuit₀。

S402, obtaining the sum of the measured electrical parameters of all the charged branches at the candidate power-on time after the initial power-on time, and obtaining the ratio of the measured electrical parameters of each charged branch at the candidate power-on time to the sum of the measured electrical parameters.

Specifically, at the current candidate power-on time, the charging device calculates the sum of the measured electrical parameters of all the powered-on charging branches at the candidate power-on time to obtain a sum, and further divides the measured electrical parameters of each powered-on charging branch at the candidate power-on time by the ratio of the sum to be used as the ratio of the measured electrical parameters of each powered-on charging branch at the candidate power-on time to the sum of the measured electrical parameters.

Optionally, the current candidate power-on time may be a candidate power-on time adjacent to the initial power-on time, or may be another candidate power-on time.

For example, as shown in fig. 2A, at time T3, there are 3 charged charging branches, which are respectively a 1 st charging branch, a 2 nd charging branch, and a 3 rd charging branch; the control current is known as I₀(ii) a The charging equipment obtains the measured current I of the 1 st charging branch at the moment T3 through measurement_1C3And the measured current I of the 2 nd charging branch_2C3And the measured current I of the 3 rd charging branch_3C3(ii) a The ratio R of the measured electrical parameter of the 1 st charging branch to the sum of the measured electrical parameters of all the charging branches that have been powered up is then₁＝I_1C3÷(I_1C3+I_2C3+I_3C3) The ratio of the measured electrical parameter of the 2 nd charging branch to the sum of the measured electrical parameters of all the charged charging branches is R of the branch₂＝I_2C3÷(I_1C3+I_2C3+I_3C3) The ratio R of the measured electrical parameters of the 3 rd charging branch to the sum of the measured electrical parameters of all the charged charging branches₃＝I_3C3÷(I_1C3+I_2C3+I_3C3)。

And S403, calculating to obtain the correction quantity of the electrical parameters on each electrified charging branch according to the total electrical parameters of the charging equipment at the current candidate electrifying time, the control electrical parameters, the measured electrical parameters on each electrified charging branch at the current candidate electrifying time and the ratio.

Optionally, at the current candidate power-on time, the charging device calculates the correction amount of the electrical parameter on each powered-on charging branch according to the obtained total electrical parameter, the control electrical parameter, the measured electrical parameter on each powered-on charging branch at the candidate power-on time, and the ratio.

For example, as shown in fig. 2A, on the basis of the example of S402, at time T3, there are 3 charged charging branches, which are respectively the 1 st charging branch, the 2 nd charging branch, and the 3 rd charging branch; the control current is known as I₀(ii) a The charging equipment obtains the measured current I of the 1 st charging branch at the moment T3 through measurement_1C3And the measured current I of the 2 nd charging branch_2C3And the measured current I of the 3 rd charging branch_3C3And obtaining the total current I of the charging equipment at the T3 moment through measurement_T3(ii) a By combining the above obtained R₁、R₂And R₃And the time T3 is obtained by calculation,

current correction delta I of 1 st charging branch₁＝R₁×(I_T3-I₀-(I_1C3+I_2C3+I_3C3))；

Current correction delta I of 2 nd charging branch₂＝R₂×(I_T3-I₀-(I_1C3+I_2C3+I_3C3))；

Current correction delta I of 3 rd charging branch₃＝R₃×(I_T3-I₀-(I_1C3+I_2C3+I_3C3))。

Alternatively, the charging device may be based on

Or a variation of this formulaCalculating the correction quantity delta E of the electrical parameters on the i-th charged branch after being electrified_i；

Wherein, R is_iIn the ratio of E to_TThe total electrical parameters of the charging equipment at the current candidate power-on time are obtained; said E₀For said control of electrical parameters, said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrification time are obtained; and n is greater than or equal to 2.

In the embodiment of the invention, the charging equipment firstly calculates the proportion of the measured electrical parameters on the electrified charging branches to the total electrical parameters, and the proportion reflects the proportion sharing condition of the correction quantity of the total electrical parameters of each electrified charging branch by each electrified charging branch, so that more accurate correction quantity of the electrical parameters on each electrified charging branch can be obtained through the proportion, and further more accurate actual electrical parameters on the corresponding charging branches can be obtained based on the accurate correction quantity of the electrical parameters of each branch, thereby overcoming the crosstalk among multiple branches and improving the accuracy of the measured values of the current and/or the power of the charging branches; and then based on this more accurate electric current and/or power, alright calculate more accurate actual power consumption to can carry out accurate charge according to this more accurate actual power consumption, very big promotion user's use experience.

It should be understood that although the various steps in the flow charts of fig. 2-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.

Fig. 6 is a schematic structural diagram of an electrical parameter measuring apparatus according to an embodiment, as shown in fig. 6, the apparatus includes: the device comprises an acquisition module 11, a control module 12 and a determination module 13.

Specifically, the obtaining module 11 is configured to obtain the number of devices to be charged currently connected to the charging device; the charging circuit comprises a charging branch circuit, a charging branch circuit and a charging control circuit, wherein the charging branch circuit is formed by one device to be charged and the charging circuit;

the control module 12 is configured to control the power-on time of each charging branch in a time-sharing manner according to the number of the devices to be charged, so as to measure and obtain measured electrical parameters on each powered-on charging branch at different power-on times; acquiring the total electrical parameters of the charging equipment at different power-on moments; the total electrical parameter of the charging equipment at one power-on moment is equal to the sum of the actual electrical parameter of each powered-on charging branch at the power-on moment and the control electrical parameter on the control circuit in the charging equipment;

the determining module 13 is configured to calculate an electrical parameter correction amount on each charging branch according to the total electrical parameter, the control electrical parameter on the control circuit, and the measured electrical parameter on each powered charging branch at the different power-on times, and calculate an actual electrical parameter on each charging branch according to the electrical parameter correction amount on each charging branch and the measured electrical parameter on each charging branch.

Optionally, the electrical parameter in this embodiment includes current and/or power.

Optionally, the control module 12 is specifically configured to control a charging branch to be powered on at a current power-on time, and measure and obtain measured electrical parameters of all powered-on charging branches at the current power-on time; controlling the other charging branch circuit to be powered on at the next power-on moment, and measuring to obtain the measured electrical parameters of all the powered-on charging branch circuits at the next power-on moment;

optionally, the control module 12 is specifically configured to measure a total electrical parameter of the charging device at a current power-on time when the charging branch is controlled to be powered on at the current power-on time; and measuring the total electrical parameters of the charging equipment at the next power-on moment when the other charging branch is controlled to be powered on at the next power-on moment.

The electrical parameter measurement apparatus provided in this embodiment may implement the above method embodiments, and the implementation principle and technical effect are similar, and are not described herein again.

Fig. 7 is a schematic structural diagram of an electrical parameter measuring apparatus according to an embodiment, and based on the above embodiment, as shown in fig. 7, the determining module 13 includes: a first determining unit 131, a second determining unit 132, a first calculating unit 133, a first acquiring unit 134, and a second calculating unit 135.

Specifically, the first determining unit 131 is configured to, when the current power-on time is an initial power-on time, use a first charging branch triggered to be powered on at the initial power-on time as a reference branch, and obtain a reference electrical parameter on the reference branch;

a second determining unit 132, configured to determine, as a control electrical parameter of the control circuit, a difference between the reference electrical parameter and a total electrical parameter of the charging device at the initial power-on time minus the reference electrical parameter;

a first calculating unit 133, configured to calculate an electrical parameter correction amount on each charging branch according to the control electrical parameter, the reference electrical parameter, a total electrical parameter of the charging device at each candidate power-on time after an initial power-on time, and a measured electrical parameter on each powered-on charging branch at the different candidate power-on times; a first obtaining unit 134, configured to obtain, at a current power-on time, a measured electrical parameter on each powered-on charging branch;

a second calculating unit 135, configured to determine a sum of the measured electrical parameter on the charging branch and the corresponding electrical parameter correction amount as an actual electrical parameter of the charging branch at the current power-on time.

The electrical parameter measurement apparatus provided in this embodiment may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.

Fig. 8 is a schematic structural diagram of an electrical parameter measuring apparatus according to an embodiment, where on the basis of the foregoing embodiment, as shown in fig. 8, the first calculating unit 133 includes: a first calculation sub-unit 1331 and a second calculation sub-unit 1332.

Specifically, the first calculating subunit 1331 is configured to obtain a first measured electrical parameter of the first charging branch at a next candidate power-on time of the initial power-on time, and calculate an electrical parameter correction amount of the first charging branch according to the reference electrical parameter and the first measured electrical parameter;

a second calculating subunit 1332, configured to calculate, according to the control electrical parameter, the measured electrical parameter on each powered-up charging branch at each candidate power-up time, the total electrical parameter of the charging device at different candidate power-up times, and the electrical parameter correction amount obtained before each candidate power-up time, the electrical parameter correction amount of the charging branch triggered to be powered up at each candidate power-up time.

Optionally, the second calculating subunit 1332 is specifically configured to calculate the data according to

In an embodiment, the first calculating unit 133 is specifically configured to, if the current power-on time is an initial power-on time, determine, as the control electrical parameter of the control circuit, a difference between a total electrical parameter of the charging device at the initial power-on time and a measured electrical parameter of a charging branch triggered to be powered on at the initial power-on time; the sum of the measured electrical parameters of all the charged branches at the candidate power-on time after the initial power-on time is obtained, and the ratio of the measured electrical parameters of each charged branch at the candidate power-on time to the sum of the measured electrical parameters is obtained; and calculating to obtain the correction quantity of the electrical parameters on each electrified charging branch according to the total electrical parameters of the charging equipment at the current candidate electrifying time, the control electrical parameters, the measured electrical parameters on each electrified charging branch at the candidate electrifying time and the ratio.

Optionally, in this embodiment, the first calculating unit 133 is specifically configured to calculate the first value according to

The modules in the electrical parameter metering device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the terminal device, and can also be stored in a memory in the terminal device in a software form, so that the processor can call and execute operations corresponding to the modules.

Fig. 9 is a schematic diagram of an internal structure of a charging apparatus according to an embodiment, where the charging apparatus includes a processor, a memory, a network interface, a display screen, and an input device, which are connected by a system bus. Wherein the processor of the charging device is configured to provide computing and control capabilities. The memory of the charging device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of electrical parameter metrology. The display screen of the charging device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the charging device can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer device, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the structure shown in fig. 9 is a block diagram of only a portion of the structure related to the present application, and does not constitute a limitation of the charging device to which the present application is applied, and a specific charging device may include more or less components than those shown in the drawings, or combine some components, or have a different arrangement of components.

In one embodiment, there is provided a charging device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program:

acquiring the number of devices to be charged which are currently accessed into the charging device; the charging circuit comprises a charging branch circuit, a charging branch circuit and a charging control circuit, wherein the charging branch circuit is formed by one device to be charged and the charging circuit; according to the number of the devices to be charged, the power-on time of each charging branch is controlled in a time-sharing manner, so that the measured electrical parameters of each powered-on charging branch at different power-on moments are measured; acquiring the total electrical parameters of the charging equipment at different power-on moments; the total electrical parameter of the charging equipment at one power-on moment is equal to the sum of the actual electrical parameter of each powered-on charging branch at the power-on moment and the control electrical parameter on the control circuit in the charging equipment; and calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and calculating the actual electrical parameters on each charging branch according to the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method for measuring electrical parameters is characterized in that,

calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and performing summation operation processing on the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch to obtain the actual electrical parameters on each charging branch;

the calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments comprises:

according to

Calculating the electrical parameter correction quantity delta E of the nth charging branch triggered to be powered on at the current candidate power-on moment_n(ii) a Wherein, E is_TThe total electrical parameters of the charging equipment at the current candidate power-on time are obtained; said E₀Is the control electrical parameter; said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrifying moment; the Δ E_iCorrecting the electrical parameter on the ith charging branch before the current candidate power-on time; n is greater than or equal to 2;

or, according to

Calculating the correction quantity delta E of the electrical parameters on the ith charged branch_i(ii) a Wherein, R is_iAs candidate power-on timeThe ratio of the measured electrical parameters on each charged branch circuit which is powered on next to the sum of the measured electrical parameters, wherein the sum of the measured electrical parameters is the sum of the measured electrical parameters on all the charged branch circuits which are powered on next to the candidate power-on time, and E_TThe total electrical parameters of the charging equipment at the current candidate power-on time are obtained; said E₀For said control of electrical parameters, said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrification time are obtained; n is greater than or equal to 2;

the electrical parameter comprises current and/or power.

2. The method according to claim 1, wherein the time-sharing control of the power-on time of each charging branch according to the number of the devices to be charged to measure and obtain the measured electrical parameters of each powered-on charging branch at different power-on times comprises:

3. The method of claim 2, wherein the obtaining the total electrical parameters of the charging device at different power-on times comprises:

4. The method of claim 3, wherein said calculating an electrical parameter correction on each charging branch based on said total electrical parameter, said control electrical parameter on said control circuit, and said measured electrical parameter on each powered charging branch at said different power-on times comprises:

5. The method of claim 4, wherein said calculating an electrical parameter correction on each charging branch from said control electrical parameter, said reference electrical parameter, a total electrical parameter of said charging device at each candidate power-up time subsequent to an initial power-up time, and a measured electrical parameter on each powered-up charging branch at said different candidate power-up times comprises:

6. The method according to claim 5, wherein the performing summation operation on the correction quantity of the electrical parameter on each charging branch and the measured electrical parameter on each charging branch to obtain the actual electrical parameter on each charging branch comprises:

7. The method according to claim 5, wherein the performing summation operation on the correction quantity of the electrical parameter on each charging branch and the measured electrical parameter on each charging branch to obtain the actual electrical parameter on each charging branch comprises:

and multiplying the correction quantity of the electrical parameters on each charging branch by a weighting factor to obtain a product value, calculating the sum value of the product value and the corresponding measured electrical parameters on each charging branch, and taking the sum value as the actual electrical parameters on each corresponding charging branch.

8. The method of claim 3, wherein said calculating an electrical parameter correction on each charging branch based on said total electrical parameter, said control electrical parameter on said control circuit, and said measured electrical parameter on each powered charging branch at said different power-on times comprises:

9. The method according to claim 8, wherein if there is only one charged branch at the current power-on time, the charging device determines that the correction amount of the electrical parameter of the charged branch at the current power-on time is zero.

10. An electrical parameter metering device, the device comprising:

the determining module is used for calculating the correction quantity of the electrical parameters on each charging branch according to the total electrical parameters, the control electrical parameters on the control circuit and the measured electrical parameters on each electrified charging branch at different electrifying moments, and summing the correction quantity of the electrical parameters on each charging branch and the measured electrical parameters on each charging branch to obtain the actual electrical parameters on each charging branch;

the determination module is particularly used for

According to

or, according to

Calculating the correction quantity delta E of the electrical parameters on the ith charged branch_i(ii) a Wherein, R is_iThe ratio of the measured electrical parameters on each charged branch circuit which is electrified at the candidate electrifying time to the sum of the measured electrical parameters, wherein the sum of the measured electrical parameters is the sum of the measured electrical parameters on all the charged branch circuits which are electrified at the candidate electrifying time, and E_TThe total electrical parameters of the charging equipment at the current candidate power-on time are obtained; said E₀For said control of electrical parameters, said E_icnThe measured electrical parameters on the ith electrified charging branch measured when the nth charging branch is electrified at the current candidate electrification time are obtained; n is greater than or equal to 2;

the electrical parameter comprises current and/or power.

11. A charging device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 9 when executing the computer program.

12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 9.