CN113406547A

CN113406547A - Method, device and equipment for determining state of current detection device and vehicle

Info

Publication number: CN113406547A
Application number: CN202010187648.XA
Authority: CN
Inventors: �田�浩; 刘国萍; 谭先华
Original assignee: BYD Co Ltd; Changsha BYD Automobile Co Ltd
Current assignee: BYD Co Ltd; Changsha BYD Automobile Co Ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2021-09-17
Anticipated expiration: 2040-03-17
Also published as: CN113406547B

Abstract

The application provides a method for determining the state of a current detection device, wherein the current detection device is arranged between a charging and discharging device and at least one external device, and the current detection device is used for detecting the current between the charging and discharging device and the at least one external device, and the method comprises the following steps: acquiring working state parameters of at least one external device within a target preset time; determining a corresponding working state parameter interval according to the working state parameter of at least one external device and at least one proportionality coefficient; acquiring working state parameters of charging equipment within a target preset time; if the working state parameter of the charging and discharging equipment is within the working state parameter interval, determining that the current detection device is in a normal state; and if the working state parameters of the charging and discharging equipment are outside the corresponding working state parameter intervals, determining that the current detection device is in an abnormal state. By implementing the method and the device, states of different current detection devices can be determined, and the applicability of the scheme is improved.

Description

Method, device and equipment for determining state of current detection device and vehicle

Technical Field

The present application relates to the field of electronic technologies, and in particular, to a method, an apparatus, a device, and a vehicle for determining a state of a current detection apparatus.

Background

The current is an important parameter, for example, in the current rapidly developed electric vehicle technology, the current value of the power battery pack is directly related to the effective reliability of the charge and discharge power control of the power battery pack and the estimation of the battery state of charge value and other important functions. Therefore, when the current detection device is used to detect the current, the working state of the current detection device needs to be determined, and whether the battery current value is accurate and effective is determined according to the working state of the current detection device.

In the prior art, taking a hall current sensor as an example of a current detection device, the state judgment of the hall current sensor is related to the working principle, manufacturers and models of the hall current sensor, the judgment methods for the normal work of each hall current sensor are different, the prior art scheme can only be applied to specific sensors, and therefore the applicability of the prior art scheme is poor.

Disclosure of Invention

The application provides a method for determining the state of a current detection device, which can determine the states of different current detection devices and improve the applicability of a scheme.

In one aspect, an embodiment of the present application provides a method for determining a state of a current detection device, where the current detection device is disposed between a charging and discharging device and at least one external device, and the current detection device is configured to detect a current between the charging and discharging device and the at least one external device, and the method includes:

acquiring working state parameters of the at least one external device within a target preset time;

determining a corresponding working state parameter interval according to the working state parameter of the at least one external device and the at least one proportionality coefficient;

acquiring working state parameters of the charging and discharging equipment within the target preset time;

if the working state parameter of the charging and discharging equipment is within the working state parameter interval, determining that the current detection device is in a normal state; and if the working state parameters of the charging and discharging equipment are outside the corresponding working state parameter intervals, determining that the current detection device is in an abnormal state.

In a possible embodiment, the at least one external device is a powered device, and the charging and discharging device is in a discharging state; the working state parameter is power, and the working state parameter interval is a power data interval;

the determining the corresponding working state parameter interval according to the working state parameter of the at least one external device and the at least one proportionality coefficient comprises:

determining the power data interval according to the power consumption of at least one piece of electric equipment, a first proportional coefficient and a second proportional coefficient within the target preset time; the upper limit of the power data interval is determined according to the power consumption and the first proportional coefficient, and the lower limit of the power data interval is determined according to the power consumption and the second proportional coefficient;

the acquiring of the working state parameters of the charging and discharging device within the target preset time includes:

acquiring the discharge voltage of the charge and discharge equipment within the target preset time and the discharge current of the charge and discharge equipment detected by the current detection device, and determining the discharge power of the charge and discharge equipment within the target preset time according to the discharge voltage and the discharge current;

if the working state parameter of the charging and discharging equipment is within the working state parameter interval, determining that the current detection device is in a normal state; if the working state parameter of the charging and discharging equipment is outside the corresponding working state parameter interval, determining that the current detection device is in the abnormal state comprises:

and if the discharge power of the charge and discharge equipment in the target preset time is within the power data interval, determining that the current detection device is in a normal state, and if the discharge power of the charge and discharge equipment in the target preset time is outside the power data interval, determining that the current detection device is in an abnormal state.

In a possible implementation manner, the determining that the current detection device is in an abnormal state if the discharge power of the charge and discharge device within the target preset time is outside the power data interval includes:

if the discharge power of the charge and discharge equipment in the target preset time is not smaller than the upper limit of the power data interval, marking that the current detection device is in a first abnormal state;

if the discharge power of the charge and discharge equipment in the target preset time is not larger than the lower limit of the power data interval, detecting whether the discharge current of the charge and discharge equipment in the target preset time is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state.

In another possible embodiment, the at least one external device is a power supply device, and the charging and discharging device is in a charging state; the working state parameter is current, and the working state parameter interval is a current data interval;

determining a current data interval according to the power supply current, the third proportionality coefficient and the fourth proportionality coefficient which are sent to the charging and discharging equipment by the power supply equipment within the target preset time; the upper limit of the current data interval is determined according to the power supply current and the third proportionality coefficient; the lower limit of the current data interval is determined according to the power supply current and the fourth proportionality coefficient;

acquiring the charging current of the charging and discharging equipment detected by the current detection device within the target preset time;

if the current detection device detects that the charging current of the charging and discharging equipment is in the current data interval within the target preset time, determining that the current detection device is in the normal state; and if the current detection device detects that the charging current of the charging and discharging equipment is out of the current data interval within the target preset time, determining that the current detection device is in an abnormal state.

In another possible implementation manner, if the current detection device detects that the charging current of the charging and discharging device is outside the current data interval within the target preset time, determining that the current detection device is in an abnormal state includes:

if the current detection device detects that the charging current of the charging and discharging equipment is not smaller than the upper limit of the current data interval within the target preset time, marking that the current detection device is in a first abnormal state;

and if the charging current is not larger than the lower limit of the current data interval, detecting whether the charging current is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state.

Further, the method further comprises:

if the charging current is not smaller than the upper limit of the current data interval and the current detection device is in the first abnormal state, determining that the current value detected by the current detection device is larger;

if the charging current is not larger than the lower limit of the current data interval and the current detection device is in the second abnormal state, determining that the current value detected by the current detection device is smaller;

and if the charging current is not larger than the lower limit of the current data interval and the current detection device is in the third abnormal state, determining that the current detection device has a fault.

Optionally, before detecting whether the charging currents are all greater than the initial rest current, the method includes:

sending an adjusting instruction to the power supply equipment under the condition that the voltage of the charging and discharging equipment is not less than a preset first voltage, wherein the adjusting instruction is an instruction for adjusting the output current of the power supply equipment to a target current;

and if the output voltage of the charging and discharging equipment is detected to be increased to a preset second voltage within a first preset time after the adjustment instruction is sent out, executing detection on whether the charging current of the charging and discharging equipment within the target preset time is larger than the initial standing current.

In one aspect, an embodiment of the present application further provides a device for determining a state of a current detection device, where the current detection device is disposed between a charging and discharging device and at least one external device, the current detection device is configured to detect a current between the charging and discharging device and the at least one external device, and the device for determining a state of a current detection device includes:

the acquisition module is used for acquiring the working state parameters of the at least one external device within a target preset time;

the determining module is used for determining a corresponding working state parameter interval according to the working state parameter of the at least one external device and the at least one proportionality coefficient;

the acquisition module is further used for acquiring working state parameters of the charging and discharging equipment within the target preset time;

the determining module is further configured to determine that the current detection device is in a normal state when the working state parameter of the charging and discharging device is within the working state parameter interval;

the determining module is further configured to determine that the current detecting device is in an abnormal state when the working state parameters of the charge and discharge device are outside the corresponding working state parameter intervals;

in one aspect, this embodiment of the present application further provides an electronic device, which includes a processor and a memory, where the processor is configured to execute a computer program stored in the memory, and implement the method steps of the foregoing aspects and any one of the possible embodiments.

On one hand, the embodiment of the application further provides a vehicle, the vehicle comprises a current detection device and a vehicle-mounted battery, and further comprises a determination device for determining the state of the current detection device, wherein the charging and discharging device is the vehicle-mounted battery.

In one aspect, the present application also provides a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the method steps of implementing the above aspects and any one of the possible embodiments.

In the application, a current detection device is arranged between a charging and discharging device and at least one external device, the current detection device is used for detecting current between the charging and discharging device and the at least one external device, a determination device for determining the state of the current detection device acquires working state parameters of the at least one external device within a target preset time, and a corresponding working state parameter interval is determined according to the working state parameters of the at least one external device and at least one proportionality coefficient; acquiring working state parameters of the charging and discharging equipment within the target preset time; if the working state parameter of the charging and discharging equipment is within the working state parameter interval, determining that the current detection device is in a normal state; and if the working state parameters of the charging and discharging equipment are outside the corresponding working state parameter intervals, determining that the current detection device is in an abnormal state. By implementing the method and the device, states of different current detection devices can be determined, and the applicability of the scheme is improved.

Drawings

Fig. 1 is a schematic flowchart illustrating a method for determining a state of a current detection device according to an embodiment of the present disclosure;

fig. 2 is a schematic flowchart of another method for determining a state of a current detection device according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart of another method for determining a state of a current detection device according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram illustrating a state detection process of a charging current output by a power supply device according to an embodiment of the present disclosure;

FIG. 5 is a block diagram of a system for determining the status of a current sensing device according to an embodiment of the present disclosure;

fig. 6 is a block diagram of a device for determining a state of a current detection device according to an embodiment of the present disclosure;

fig. 7 is a block diagram of an electronic device according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following describes embodiments of the present application in further detail with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic flowchart of a method for determining a state of a current detection device according to an embodiment of the present disclosure. As shown in fig. 1, the embodiment of the present application specifically executes the following steps:

it should be noted that, the current detection device is disposed between the charging and discharging device and at least one external device, and the current detection device is configured to detect a current between the charging and discharging device and the at least one external device.

S100, the current detection device state determining device obtains the working state parameters of the at least one external device within the target preset time. Specifically, the at least one external device may be a power-consuming device or a power-supplying device. For example, the electric device may send its own operating state parameter, such as power consumption, to the determining device of the current detecting device state for a first preset time period; for another example, the power supply device may send its own operating state parameter, such as current, to the current detection device state determining device for a second preset time period.

In a possible implementation manner, the current detection device may be applied to an electric vehicle, and the charging and discharging device is an on-vehicle battery. When the vehicle-mounted battery is in a charging state, the at least one external device may include a direct-current charging cabinet or an alternating-current charging cabinet, and when the external device is the alternating-current charging cabinet, the external device further includes a vehicle-mounted charger, and the vehicle-mounted charger is configured to convert alternating current output by the alternating-current charging cabinet into direct current to charge the vehicle-mounted battery; when the vehicle-mounted battery is in a discharge state, the at least one electric device may include a vehicle-mounted air conditioner, a motor controller, a vehicle-mounted sound, a vehicle lamp, and/or a vehicle data recorder, and the vehicle-mounted battery provides power to the at least one electric device. The determination device for the state of the current detection device may be a Battery Management System (BMS) of a vehicle-mounted Battery, and the BMS communicates with the external device through a communication bus to obtain a working state parameter of the external device, for example, the BMS communicates with the dc charging cabinet or the charger to obtain a current value provided by the dc charging cabinet or the charger to the vehicle-mounted Battery, and communicates with electrical devices such as a vehicle-mounted air conditioner, a motor controller, a vehicle audio, a vehicle lamp, and/or a vehicle data recorder to obtain power consumption of each electrical device. The BMS system may be understood as an integrated chip having functions of data acquisition, data processing, and device communication, and may further include external circuits such as a voltage stabilizing circuit and/or a short circuit protection circuit, etc.

S101, the determining device of the current detecting device determines a corresponding working state parameter interval according to the working state parameter of the at least one external device and the at least one proportionality coefficient. Specifically, the current detection device state determination device acquires the operating state parameter of the at least one external device in step S100, and the at least one scaling factor is an experimental value acquired from a large amount of experimental data and is stored in advance in the current detection device state determination device.

S102, the determining device of the current detection device obtains working state parameters of the charging and discharging equipment within the target preset time. Specifically, the working parameters of the charging and discharging device include parameters detected by the current detection device, for example, if the working state parameter is a current, the current detected by the current detection device is the current of the charging and discharging device; for another example, if the operating state parameter is power, the power of the charging and discharging device is obtained by multiplying the current of the charging and discharging device by the voltage of the charging and discharging device detected by the current, and the voltage of the charging and discharging device may be obtained by the determining device of the state of the current detecting device. For example, the current detection device may be a hall current sensor, or may be an instrument such as an ammeter or a multimeter. Illustratively, the charging and discharging device may be a device having a function of storing electric quantity, such as a battery, a battery jar, a capacitor, or the like.

S103, if the working state parameters of the charging and discharging equipment are within the working state parameter interval, the current detection device is determined to be in a normal state by the current detection device state determination device; and if the working state parameters of the charging and discharging equipment are outside the corresponding working state parameter intervals, the determining device of the state of the current detecting device determines that the current detecting device is in an abnormal state.

In the present application, the determining device for the state of the current detecting device determines the operating state parameter interval according to the operating parameters of the external device, and determines the state of the current detecting device by comparing the relationship between the operating parameters of the charging and discharging device and the operating state parameter interval, where the operating parameters of the charging and discharging device include the parameters detected by the current detecting device. By implementing the method and the device, states of different current detection devices can be determined, and the applicability of the scheme is improved.

In a possible embodiment, if the charging and discharging device is in a discharging state, the at least one external device is an electric device, and the charging and discharging device is in the discharging state is described below with reference to the accompanying drawings, referring to fig. 2, and fig. 2 is a schematic flow chart of another method for determining a state of a current detection apparatus according to the embodiment of the present application. As shown in fig. 2, the present embodiment specifically executes the following steps:

it should be noted that, the operating state parameter is power, and the operating state parameter interval is a power data interval.

S200, the current detection device state determining device obtains the power consumption of at least one piece of electric equipment in the target preset time. Specifically, for example, the charging and discharging device is a power battery of an electric vehicle, the determining device for determining the state of the current detecting device may determine that the charging and discharging device is in the discharging state by detecting a key insertion signal of the electric vehicle, the at least one electrical device may include an on-vehicle air conditioner, a motor controller, an on-vehicle audio, a vehicle lamp and/or a vehicle data recorder, and the at least one electrical device sends its own electrical power to the determining device of the current detecting device, such as the BMS system, in a predetermined time period, and optionally, the predetermined time period may be determined by an instruction sent by the determining device of the current detecting device to the at least one electrical device, the instruction includes a first predetermined proportional relationship between the predetermined time period and the target predetermined time, for example, the first predetermined proportional relationship between the predetermined time period and the target predetermined time is 1, the preset time period is the same as the target preset time; for another example, the first preset proportional relationship between the target preset time and the preset time period is 10, illustratively, the target preset time is 1ms, and the preset time period is 0.1 ms. It is understood that the charging and discharging device may also be applied to other application scenarios besides a power battery of an electric vehicle, for example, the charging and discharging device is applied to a battery of a notebook computer, and the at least one electric device includes a speaker and/or a screen, etc.

S201, determination of state of current detection deviceThe device determines a power data interval according to the power consumption of at least one piece of electric equipment, the first proportionality coefficient and the second proportionality coefficient within the target preset time. Specifically, the upper limit of the power data interval is determined according to the power consumption and the first scaling factor, and the lower limit of the power data interval is determined according to the power consumption and the second scaling factor. Taking the charging and discharging device as an example of a power battery of an electric vehicle, if the determining device of the state of the current detecting device sends the at least one electric device a command that the first preset proportional relationship between the preset time period for sending the electric power to the at least one electric device and the target preset time is 1, for example, the preset time period is 1ms, and the target preset time is 1ms, then the electric power P1, P2, P3 and/or P4 of the electric vehicle, such as a car audio, a car air conditioner, a car light and/or a tachograph, are sent to the determining device of the state of the current detecting device at a period of 1ms, respectively, the electric power Σ P of the at least one electric device within 1ms is P1+ P2+ P3+ P4, and the first proportional coefficient is k₁And said second scaling factor is k₂The first scale factor k is an experimental value obtained through a large amount of experimental data₁Greater than 1, the second proportionality coefficient k₂Less than 1, e.g. k₁Is 1.2, k₂Is 0.8; or k₁Is 1.5, k₂0.9, etc., the upper limit of the power data interval is the first scaling factor k₁Multiplying the power consumption Σ P of the at least one consumer, i.e. the upper limit of the power data interval is k₁Sigma P; the lower limit of the power data interval is the second proportionality coefficient k₂Multiplying the power consumption of the at least one consumer by the power consumption ∑ P, i.e. the lower limit of the power data interval is k₂Sigma P; the power data interval may thus be denoted as a full-close interval k₂∑P，k₁∑P]Optionally, the power data interval may also be expressed as a full-open interval (k)₂∑P，k₁Σ P), it will be understood that the full-closed interval represents that the power data interval comprises intervalsUpper and lower limits, the full open interval representing the upper and lower limits of the power data interval excluding the interval. In more possible embodiments, the power data interval may also be a half-open and half-closed interval (k)₂∑P，k₁∑P]Representing the lower limit of the power data interval excluding the interval and the upper limit of the interval; or a half-closed and half-open interval [ k ]₂∑P，k₁Σ P) representing that the power data interval includes a lower limit of the interval and does not include an upper limit of the interval. In the present application, it is not limited whether or not the power data section includes the upper and lower limits of the section. If the first preset proportional relationship between the preset time period for sending the electric power to the at least one electric device and the target preset time is 10, for example, the preset time period is 0.1ms, and the target preset time is 1ms, the determining device of the state of the current detecting device may receive the electric power of 10 vehicle-mounted sound equipment, vehicle-mounted air conditioner, vehicle lights and/or vehicle data recorder in the electric vehicle within 1ms of the target preset time, and in a possible implementation manner, the electric power of each electric device within 1ms of the target preset time may be averaged to obtain an average value

And/or

Then, the average value of the power consumption of each electric device within 1ms of the target preset time is summed to obtain the power consumption of the at least one electric device

The power data interval may thus be denoted as k₂∑P′，k₁∑P′](ii) a In another possible implementation, the method can also be used forThe method comprises the steps that a plurality of power utilization power calculation modes or median values of each power utilization device received by each power utilization device within the target preset time 1ms are respectively used as the power utilization power of each power utilization device within the target preset time, and the data processing of the power utilization power of each power utilization device is not limited.

S202, the determining device of the current detecting device obtains the discharging voltage of the charging and discharging equipment within the target preset time and the discharging current of the charging and discharging equipment detected by the current detecting device, and the discharging power of the charging and discharging equipment within the target preset time is determined according to the discharging voltage and the discharging current. Specifically, the determining device for the state of the current detecting device has an analog-to-digital conversion function, and can collect the discharge voltage of the charging and discharging device within the target preset time, for example, the charging and discharging device discharges in a constant current, and the discharge current of the charging and discharging device is I_dThe determining device of the state of the current detecting device collects the discharge voltage of the charge and discharge equipment in a preset collecting period, sums the discharge voltage collected by the charge and discharge equipment in the target preset time to obtain an average value as the discharge voltage U of the charge and discharge equipment in the target preset time, and multiplies the discharge voltage U of the charge and discharge equipment in the target preset time by the discharge current I of the charge and discharge equipment_dObtaining the discharge power P of the charge and discharge equipment in the target preset time₅(ii) a For another example, the charging and discharging equipment is not discharged at a constant current, the determining device for the state of the current detecting device sums and averages the discharging currents of the charging and discharging equipment in the target preset time to obtain the discharging current I of the charging and discharging equipment_dDischarging current I of the charging and discharging equipment_dMultiplying the discharge voltage U of the charge and discharge equipment within the target preset time to obtain the discharge power P of the charge and discharge equipment within the target preset time₅(ii) a For another example, the determining device for the state of the current detecting device collects the discharge voltage of the charging and discharging device each time and the current detecting device collects the charge voltage each timeMultiplying the discharge current of the discharge equipment to obtain the discharge power of the charge and discharge equipment at the current acquisition moment, summing and averaging the discharge power of the charge and discharge equipment at the current acquisition moment within the target preset time at the current acquisition moment to obtain the discharge power P of the charge and discharge equipment within the target preset time₅And the method and the device do not limit how to process the discharge voltage of the charge and discharge equipment within the target preset time and the discharge power of the charge and discharge equipment obtained by detecting the discharge current of the charge and discharge equipment by the current detection device.

S203, the current detection device state determining device judges whether the discharge power of the charging and discharging equipment in the target preset time is in the power data interval, if the discharge power of the charging and discharging equipment in the target preset time is in the power data interval, the current detection device is determined to be in a normal state, and if the discharge power of the charging and discharging equipment in the target preset time is out of the power data interval, the current detection device is in an abnormal state. In one possible implementation, after step S201, the power data interval may be represented as a full-close interval [ k ]₂∑P，k₁∑P]After step S202, the determining device for determining the state of the current detecting device obtains the discharging power P of the charging and discharging device within the target preset time₅If k is₂∑P≤P₅≤k₁Σ P, the current detection means state determination means determining that the current detection means is in a normal state; if k is₁∑P＜P₅Or P₅＜k₂Σ P, the current detection means state determination means determines that the current detection means is in an abnormal state. In another possible implementation manner, after step S201, the power data interval may be represented as a full-on interval (k)₂∑P，k₁Σ P), after step S202, the determining means of the state of the current detecting means obtains the discharge power P of the charge and discharge device within the target preset time₅If k is₂∑P＜P₅＜k₁Sigma P, saidThe current detection device state determining device determines that the current detection device is in a normal state; if k is₁∑P≤P₅Or P₅≤k₂Σ P, the current detection means state determination means determines that the current detection means is in an abnormal state. In yet another possible implementation manner, after step S201, the power data interval may be represented as a half-open and half-closed interval (k)₂∑P，k₁∑P]After step S202, the determining device for determining the state of the current detecting device obtains the discharging power P of the charging and discharging device within the target preset time₅If k is₂∑P＜P₅≤k₁Σ P, the current detection means state determination means determining that the current detection means is in a normal state; if k is₁∑P＜P₅Or P₅≤k₂Σ P, the current detection means state determination means determines that the current detection means is in an abnormal state. In yet another possible implementation manner, after step S201, the power data interval may be represented as a half-open and half-closed interval [ k ]₂∑P，k₁Σ P), after step S202, the determining means of the state of the current detecting means obtains the discharge power P of the charge and discharge device within the target preset time₅If k is₂∑P≤P₅＜k₁Σ P, the current detection means state determination means determining that the current detection means is in a normal state; if k is₁∑P≤P₅Or P₅＜k₂Σ P, the current detection means state determination means determines that the current detection means is in an abnormal state.

In this embodiment, the current detection device state determination device obtains the power consumption of the at least one electric device within a target preset time; determining a power data interval according to the power consumption, the first proportionality coefficient and the second proportionality coefficient; the upper limit of the power data interval is determined according to the power consumption and the first proportional coefficient, and the lower limit of the power data interval is determined according to the power consumption and the second proportional coefficient; acquiring the discharge voltage of the charge and discharge equipment within the target preset time and the discharge current of the charge and discharge equipment detected by the current detection device, and determining the discharge power of the charge and discharge equipment within the target preset time according to the discharge voltage and the discharge current of the charge and discharge equipment within the target preset time; and if the discharge power of the charge and discharge equipment in the target preset time is within the power data interval, determining that the current detection device is in a normal state, and if the discharge power of the charge and discharge equipment in the target preset time is outside the power data interval, determining that the current detection device is in an abnormal state. In this embodiment, when the charging/discharging device is in the discharging state, the state of the current detection device provided between the charging/discharging device and the power consumption device may be checked.

In a possible embodiment, if the discharge power of the charge and discharge equipment within the target preset time is not less than the upper limit of the power data interval, marking that the current detection device is in a first abnormal state; if the discharge power of the charge and discharge equipment in the target preset time is not larger than the lower limit of the power data interval, detecting whether the discharge current of the charge and discharge equipment in the target preset time is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S201, the power data interval may be represented as a full-on interval (k)₂∑P，k₁Σ P), after step S202, the determining means of the state of the current detecting means obtains the discharge power P5 of the charge and discharge device within the target preset time, if k₂∑P＜P₅＜k₁Σ P, the current detection means state determination means determining that the current detection means is in a normal state; if k is₁∑P≤P₅A determination means of the state of said current detection means marks that said current detection means is in said first abnormal state, which represents that the value of the current detected by said current detection means is large; if P₅≤k₂Sigma P, and I_d＞I₀And said current detecting means state determining means marks that said current detecting means is in said second abnormal state representing that the value of the current detected by said current detecting means is small, wherein I_dFor the current detection device to detect the discharge current of the charge and discharge equipment within the target preset time, I₀For the initial standing current, the magnitude of the initial standing current is preset, and taking the charging and discharging device as a power battery of an electric vehicle as an example, the initial standing current may be obtained by measuring a plurality of experimental values at the electric vehicle through a large number of experiments by the current detection device and then processing experimental data. If P₅≤k₂Sigma P, and I_d≤I₀The current detecting device state determining means marks that the current detecting device is in the third abnormal state, which represents that the current value detected by the current detecting device is invalid, that is, the current detecting device is malfunctioning.

In another possible embodiment, if the discharge power of the charge and discharge equipment within the target preset time is greater than the upper limit of the power data interval, marking that the current detection device is in a first abnormal state; if the discharge power of the charge and discharge equipment in the target preset time is smaller than the lower limit of the power data interval, detecting whether the discharge currents of the charge and discharge equipment in the target preset time are all larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S201, the power data interval may be represented as a full-close interval [ k ]₂∑P，k₁∑P]After step S202, the determining device for determining the state of the current detecting device obtains the discharging power P of the charging and discharging device within the target preset time₅If k is₂∑P≤P₅≤k₁Σ P, said current detecting means being determined by said current detecting means state determining meansSetting the device in a normal state; if k is₁∑P＜P₅The current detection means state determination means marks that the current detection means is in the first abnormal state; if P₅＜k₂Sigma P, and I_d＞I₀The current detection means state determination means marks that the current detection means is in the second abnormal state; if P₅＜k₂Sigma P, and I_d≤I₀The current detection means state determination means marks that the current detection means is in the third abnormal state.

In another possible embodiment, if the discharge power of the charging and discharging device within the target preset time is greater than the upper limit of the power data interval, marking that the current detection device is in a first abnormal state; if the discharge power of the charge and discharge equipment in the target preset time is not larger than the lower limit of the power data interval, detecting whether the discharge current of the charge and discharge equipment in the target preset time is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S201, the power data interval may be expressed as a half-open and half-closed interval (k)₂∑P，k₁∑P]After step S202, the determining device for determining the state of the current detecting device obtains the discharging power P of the charging and discharging device within the target preset time₅If k is₂∑P＜P₅≤k₁Σ P, the current detection means state determination means determining that the current detection means is in a normal state; if k is₁∑P＜P₅The current detection means state determination means marks that the current detection means is in the first abnormal state; if P₅≤k₂Sigma P, and I_d＞I₀The current detection means state determination means marks that the current detection means is in the second abnormal state; if P₅≤k₂Sigma P, and I_d≤I₀Means for determining the state of said current sensing means for marking said currentThe detection device is in the third abnormal state.

In another possible embodiment, if the discharge power of the charging and discharging device within the target preset time is not less than the upper limit of the power data interval, marking that the current detection device is in a first abnormal state; if the discharge power of the charge and discharge equipment in the target preset time is smaller than the lower limit of the power data interval, detecting whether the discharge currents of the charge and discharge equipment in the target preset time are all larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S201, the power data interval may be represented as a half-closed and half-open interval [ k ]₂∑P，k₁Σ P), after step S202, the determining means of the state of the current detecting means obtains the discharge power P of the charge and discharge device within the target preset time₅If k is₂∑P≤P₅＜k₁Σ P, the current detection means state determination means determining that the current detection means is in a normal state; if k is₁∑P≤P₅The current detection means state determination means marks that the current detection means is in the first abnormal state; if P₅＜k₂Sigma P, and I_d＞I₀The current detection means state determination means marks that the current detection means is in the second abnormal state; if P₅＜k₂Sigma P, and I_d≤I₀The current detection means state determination means marks that the current detection means is in the third abnormal state.

In this embodiment, when the charging and discharging device is in the discharging state, the determining device for determining the state of the current detecting device may record whether the current value measured by the current detecting device is too large, too small, or not valid by marking the abnormal state of the current detecting device, so that the determining device for determining the state of the current detecting device may further control the electrical equipment according to the abnormal state record of the current detecting device.

In another possible embodiment, when the charging and discharging device is in a charging state, the at least one external device is a power supply device, and the charging and discharging device is in a discharging state will be described with reference to the drawings. See fig. 3-4.

Referring to fig. 3, fig. 3 is a schematic flowchart of a method for determining a state of a current detection device according to an embodiment of the present disclosure. As shown in fig. 3, the present embodiment specifically executes the following steps:

it should be noted that, the operating state parameter is a current, and the operating state parameter interval is a current data interval.

S300, the current detection device state determining device obtains the power supply current of the power supply equipment within the target preset time. Specifically, the power supply device is connected with the charge and discharge device through a charging interface, and the power supply device is determined by the use scene of the charge and discharge device, for example, the charge and discharge device is a power battery applied to an electric vehicle, and the power supply device is a charging pile; the charging and discharging equipment is a battery applied to a notebook computer or a mobile phone terminal, and the power supply equipment is mains supply 220V and the like. Taking the charging and discharging device as an example of a power battery of an electric vehicle, optionally, the determining device for determining the state of the current detecting device may determine that the charging and discharging device is in a charging state by detecting a gun insertion signal, where the gun insertion signal may be understood as a signal indicating that the charging pile is inserted into the charging interface. The determining device of the state of the current detecting device receives the power supply current value sent by the power supply equipment in a preset receiving period, a second preset proportional relation between the preset receiving period and the target preset time is adjusted by the determining device of the state of the current detecting device, for example, the second preset proportional relation between the preset receiving period and the target preset time is 1, and the determining device of the state of the current detecting device receives the power supply current value as the power supply current I output by the power supply equipment to the charging and discharging equipment within the target preset time_e(ii) a A second preset of the preset receiving period and the target preset timeThe proportional relation is 10, and the average value of 10 charging current values received in the target preset time is taken as the power supply current I output by the power supply equipment to the charging and discharging equipment in the target preset time_e(ii) a For another example, a second preset proportional relationship between the preset receiving period and the target preset time is 100, and the mode of 100 charging current values received in the second preset time is taken as the power supply current I output by the power supply device to the charging and discharging device within the second preset time_eAnd the method and the device do not limit how to process the power supply current value sent by the power supply equipment so as to determine the power supply current output by the power supply equipment to the charging and discharging equipment within the target preset time.

S301, the determining device of the current detecting device determines a current data interval according to the power supply current, the third proportionality coefficient and the fourth proportionality coefficient which are sent to the charging and discharging equipment by the power supply equipment within the target preset time. The upper limit of the current data interval is determined according to the power supply current and the third proportionality coefficient; the lower limit of the current data interval is determined according to the power supply current and the fourth proportionality coefficient. For example, the charging current I sent by the power supply device to the charging and discharging device within the target preset time is obtained through step S300_eThe third proportionality coefficient is k₃And said fourth scaling factor is k₄The third proportionality coefficient k is an experimental value obtained through a large amount of experimental data₃Greater than 1, fourth scaling factor k₄Less than 1, e.g. k₁Is 1.6, k₂Is 0.9; or k₁Is 1.889, k₂0.889, etc., the upper limit of the current data interval is the third proportionality coefficient k₃Multiplying the power supply current I transmitted to the charging and discharging equipment by the power supply equipment within the target preset time_eObtained by defining the upper limit of the current data interval as k₃I_e(ii) a The lower limit of the current data interval is the fourth proportionality coefficient k₄Multiplying the charging time sent by the power supply equipment to the charging and discharging equipment within the target preset timeCurrent I_eObtained by defining the lower limit of the current data interval as k₄I_e(ii) a The current data interval can therefore be expressed as a full-close interval k₄I_e，k₃I_e]Optionally, the current data interval may also be expressed as a full-open interval (k)₄I_e，k₃I_e) It is to be understood that the fully closed interval represents that the current data interval includes the upper and lower limits of the interval, and the fully open interval represents that the current data interval does not include the upper and lower limits of the interval. In more possible embodiments, the current data interval may also be expressed as a half-open and half-closed interval (k)₄I_e，k₃I_e]Representing that the current data interval comprises the upper limit of the interval and does not comprise the lower limit of the interval; the current data interval can also be expressed as a half-closed and half-open interval [ k ]₄I_e，k₃I_e) And the lower limit of the interval including the current data interval and the upper limit of the interval not including the current data interval are represented. In the present application, whether or not the current data section includes the upper and lower limits of the section is not limited.

S302, the current detection device state determination device obtains the charging current of the charging and discharging equipment detected within the target preset time. Specifically, the determining device of the state of the current detecting device has an analog-to-digital conversion function, and can collect the charging current of the charging and discharging device detected by the current detecting device within the target preset time, for example, the power supply device is powered by a constant current, and the determining device of the state of the current detecting device collects the charging current of the charging and discharging device with the magnitude of I_c(ii) a For another example, if the power supply device is not supplying power at a constant current, the determining device for determining the state of the current detecting device collects the charging current of the charge and discharge device detected by the current detecting device within the target preset time in a preset collecting period, sums the charging currents, and takes an average value as the charging current of the charge and discharge device within the target preset time, where the charging current is I_cThis application does not address how to align the current sensing deviceAnd processing the data of the charging current of the charging and discharging equipment to obtain the charging current for limiting.

S303, the current detection device state determination device determines whether the charging current of the charging and discharging device is detected within the current data interval within the target preset time, and if the charging current of the charging and discharging device is detected within the current data interval within the target preset time, determines that the current detection device is in the normal state; and if the current detection device detects that the charging current of the charging and discharging equipment is out of the current data interval within the target preset time, determining that the current detection device is in the abnormal state. In one possible implementation, after step S301, the current data interval may be represented as a full-close interval [ k ]₄I_e，k₃I_e]After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e≤I_c≤k₃I_eThe current detection device state determination means determines that the current detection device is in a normal state; if k is₃I_e＜I_cOr I_c＜k₄I_eAnd the current detection device state determination means determines that the current detection device is in an abnormal state. In another possible implementation manner, after step S301, the current data interval may be represented as a full-open interval (k)₄I_e，k₃I_e) After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e＜I_c＜k₃I_eThe current detection device state determination means determines that the current detection device is in a normal state; if k is₃I_e≤I_cOr I_c≤k₄I_eAnd the current detection device state determination means determines that the current detection device is in an abnormal state. In yet another possible implementation manner, after step S301, the current data interval may be represented as a half-open and half-closed interval (k)₄I_e，k₃I_e]After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e＜I_c≤k₃I_eThe current detection device state determination means determines that the current detection device is in a normal state; if k is₃I_e＜I_cOr I_c≤k₄I_eAnd the current detection device state determination means determines that the current detection device is in an abnormal state. In yet another possible implementation manner, after step S301, the current data interval may be represented as a half-closed and half-open interval [ k ]₄I_e，k₃I_e) After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e≤I_c＜k₃I_eThe current detection device state determination means determines that the current detection device is in a normal state; if k is₃I_e≤I_cOr I_c＜k₄I_eAnd the current detection device state determination means determines that the current detection device is in an abnormal state.

In this embodiment, the determining device for the state of the current detecting device obtains the power supply current output by the power supply device to the charging and discharging device within the target preset time; determining a current data interval according to the power supply current, the third proportionality coefficient and the fourth proportionality coefficient; the upper limit of the current data interval is determined according to the power supply current and the third proportionality coefficient; the lower limit of the current data interval is determined according to the power supply current and the fourth proportionality coefficient; acquiring the charging current of the charging and discharging equipment detected by the current detection device within the target preset time; if the charging current is in the current data interval, determining that the current detection device is in the normal state; and if the charging current is out of the current data interval, determining that the current detection device is in the abnormal state. In this embodiment, when the charging/discharging device is in the charging state, the state of the current detection device provided between the charging/discharging device and the power supply device may be checked.

In a possible embodiment, if the current detection device detects that the charging current of the charging and discharging equipment is not less than the upper limit of the current data interval within the target preset time, marking that the current detection device is in a first abnormal state; and if the charging current is not larger than the lower limit of the current data interval, detecting whether the charging current is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S301, the current data interval may be represented as a full-open interval (k)₄I_e，k₃I_e) After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e＜I_c＜k₃I_eThe current detection means state determination means marks that the current detection means is in a normal state; if k is₃I_e≤I_cA determination means of the state of said current detection means marks that said current detection means is in said first abnormal state, which represents that the value of the current detected by said current detection means is large; if I_c≤k₄I_eThe current detection device state determination device detects whether the charging currents are all larger than the initial standing current I₀The initial rest current may be derived as described above in connection with the embodiment described in connection with fig. 2, whereAnd will not be described in detail. When I is_c≤k₄I_eAnd I_c＞I₀And said current detecting means state determining means marks that said current detecting means is in said second abnormal state representing that the value of the current detected by said current detecting means is small, wherein I₀Is the initial standing current, if I_c≤k₄I_eAnd I is_c≤I₀The current detecting device state determining means marks that the current detecting device is in the third abnormal state, which represents that the current value detected by the current detecting device is invalid, that is, the current detecting device is malfunctioning.

In another possible embodiment, if the current detection device detects that the charging current of the charging and discharging equipment is greater than the upper limit of the current data interval within the target preset time, marking that the current detection device is in a first abnormal state; and if the charging current is smaller than the lower limit of the current data interval, detecting whether the charging current is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S301, the current data interval may be represented as a full-close interval [ k ]₄I_e，k₃I_e]After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e≤I_c≤k₃I_eThe current detection means state determination means marks that the current detection means is in a normal state; if k is₃I_e＜I_cThe current detection means state determination means marks that the current detection means is in the first abnormal state; if I_c＜k₄I_eAnd I_c＞I₀The current detection means state determination means marks that the current detection means is in the second abnormal state; if it isI_c＜k₄I_eAnd I is_c≤I₀The current detection means state determination means marks that the current detection means is in the third abnormal state.

In yet another possible embodiment, if the current detection device detects that the charging current of the charging and discharging device is greater than the upper limit of the current data interval within the target preset time, it marks that the current detection device is in a first abnormal state; and if the charging current is not larger than the lower limit of the current data interval, detecting whether the charging current is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S301, the current data interval may be expressed as a half-open and half-closed interval (k)₄I_e，k₃I_e]After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e＜I_c≤k₃I_eThe current detection means state determination means marks that the current detection means is in a normal state; if k is₃I_e＜I_cThe current detection means state determination means marks that the current detection means is in the first abnormal state; if I_c≤k₄I_eAnd I_c＞I₀The current detection means state determination means marks that the current detection means is in the second abnormal state; if I_c≤k₄I_eAnd I_c≤I₀The current detection means state determination means marks that the current detection means is in the third abnormal state.

In another possible embodiment, if the charging current of the charging and discharging device detected by the current detection device is not less than the upper limit of the current data interval within the target preset time, it is marked that the current detection device is in the first abnormal state(ii) a And if the charging current is smaller than the lower limit of the current data interval, detecting whether the charging current is larger than the initial standing current, if so, marking that the current detection device is in a second abnormal state, otherwise, marking that the current detection device is in a third abnormal state. Specifically, after step S301, the current data interval may be represented as a half-closed and half-open interval [ k ]₄I_e，k₃I_e) After step S302, the determining device of the state of the current detecting device obtains the charging current I of the charging and discharging device detected by the current detecting device within the target preset time_cIf k is₄I_e≤I_c＜k₃I_eThe current detection means state determination means marks that the current detection means is in a normal state; if k is₃I_e≤I_cThe current detection means state determination means marks that the current detection means is in the first abnormal state; if I_c＜k₄I_eAnd I_c＞I₀The current detection means state determination means marks that the current detection means is in the second abnormal state; if I_c＜k₄I_eAnd I_c≤I₀The current detection means state determination means marks that the current detection means is in the third abnormal state.

In this embodiment, the determining device for determining the state of the current detecting device may record whether the current value measured by the current detecting device is too large, too small, or not by marking the abnormal state of the current detecting device when the charging and discharging device is in the charging state, so that the determining device for determining the state of the current detecting device may further control the power supply device according to the abnormal state record of the current detecting device.

In order to eliminate the influence on the charging current of the charging and discharging device when the charging and discharging device is in a charging state due to the fact that the supply current output by the power supply device is originally small, the current detection device detects the charging current of the charging and discharging device. In a possible implementation, the current detection deviceBefore the setting state determining means detects whether or not the charging currents are all larger than the initial rest current: under the condition that the voltage of the charging and discharging equipment is not less than a preset first voltage, a determining device of the state of the current detection device sends an adjusting instruction to the power supply equipment, the adjusting instruction is an instruction for adjusting the output current of the power supply equipment to a target current, and if the output voltage of the charging and discharging equipment is detected to rise to a preset second voltage within a first preset time after the adjusting instruction is sent, whether the charging current of the charging and discharging equipment within the target preset time is larger than an initial standing current or not is executed. Fig. 4 may be referred to in a specific implementation process, and fig. 4 is a schematic diagram of a state detection process of a power supply device outputting a charging current according to an embodiment of the present disclosure. As shown in fig. 4. The determining device of the current detection device state executes step S400 to determine that the voltage of the charge and discharge device is the first voltage, the determining device of the current detection device state acquires the voltage of the charge and discharge device in real time through the digital-to-analog conversion module, and executes step S401 when the voltage of the charge and discharge device reaches the first voltage, it can be understood that the voltage of the charge and discharge device is judged because the voltage curve of the charge and discharge device, such as a battery, is nonlinear, and after the charge and discharge device reaches a certain threshold value, i.e., the first voltage, the battery voltage enters a stage in which the battery changes slowly, which is beneficial to improving the accuracy of battery voltage detection; after the determining device of the state of the current detecting device executes step S400, step S401 is executed to send an adjusting instruction to the power supply equipment, and the power supply equipment receives the adjusting instruction sent by the determining device of the state of the current detecting device and then outputs the charging current I to the power supply equipment_cRegulated to a target current I_x(ii) a The current detection device state determination device executes step S402 to determine whether the voltage of the charge and discharge device rises to a second voltage within a first preset time after the adjustment instruction is issued, and if the voltage of the charge and discharge device rises to the second voltage within the first preset time and the second voltage is greater than the first voltage, the current detection device performs the step S402 to determine whether the voltage of the charge and discharge device rises to the second voltage within the first preset timeThe state setting determination device confirms that the output current of the power supply equipment is in a normal state, and optionally, the power supply equipment takes the target current as the charging current output by the power supply equipment to the charging and discharging equipment within the target preset time. If the voltage of the charging and discharging equipment does not rise to the second voltage within the first preset time, the determining device of the state of the current detecting device confirms that the output current of the power supply equipment is in a small state, optionally, a state prompt can be sent to the power supply equipment, so that the power supply equipment further adjusts the output current of the power supply equipment until the power supply current output by the power supply equipment can meet the condition that the voltage of the charging and discharging equipment rises to the second voltage within the first preset time. By implementing the embodiment, the power supply current output by the power supply equipment can be detected, the influence of the power supply current output by the power supply equipment on the state of the current detection device is eliminated, and the accuracy of determining the state of the current detection device is improved.

It is understood that the embodiment described above with reference to fig. 3 and the embodiment described above with reference to fig. 2 have complementary effects, the embodiment described above with reference to fig. 2 is a state confirmation of the current detection device when the charging and discharging device is in the discharging state, and the embodiment described above with reference to fig. 3 is a state confirmation of the current detection device when the charging and discharging device is in the charging state, and in a possible embodiment, the embodiments described above with reference to fig. 2 and fig. 3 may be combined to improve the accuracy of the determination of the detection result of the current detection device. In a possible implementation manner, when the determining device of the state of the current detecting device executes step S203, the current detecting device is marked with an abnormal state according to a relationship between the power consumption of the at least one piece of electric equipment and the upper and lower limits of the power data interval, and the specific implementation process may refer to the embodiment described above with reference to fig. 2, which is not described herein again. When the determining device of the state of the current detecting device executes step S303, it determines that the current value detected when the current detecting device is in the abnormal state is too large, too small, or invalid according to the upper and lower limit relationship between the charging current of the charging and discharging device and the current data interval and the flag of the determining device of the state of the current detecting device on the state of the current detecting device, and it can be understood that the current value detected when the current detecting device is in the fault state is invalid. For example, if the current detection device detects that the charging current of the charging and discharging device is not less than the upper limit of the current data interval within the target preset time, and the current detection device is in the first abnormal state, the current detection device state determination device determines that the current value detected by the current detection device is larger; if the charging current is not larger than the lower limit of the current data interval and the current detection device is in the second abnormal state, the current detection device state determination device determines that the current value detected by the current detection device is smaller; if the charging current is not greater than the lower limit of the current data interval and the current detection device is in the third abnormal state, the current detection device state determination device determines that the current detection device has a fault, that is, the current value detected by the current detection device is invalid. Further, if the current detection device detects that the charging current of the charging and discharging device is not greater than the lower limit of the current data interval within the target preset time, and the current detection device is not in the second abnormal state or the third abnormal state, the determination device for determining the state of the current detection device performs the embodiment described above with reference to fig. 4 when the charging and discharging device is in the charging state, and detects the supply current output by the power supply device, so as to eliminate the influence on the detection of the current of the charging and discharging device by the current detection device due to the smaller supply current output by the power supply device. In another possible implementation manner, the determining device for determining the state of the current detecting device marks the abnormal state of the current detecting device according to the relationship between the charging current of the charging and discharging device and the upper and lower limits of the current data interval when performing step S303, and the specific implementation process may refer to the embodiment described above with reference to fig. 3, which is not described herein again. When step S203 is executed, the determining device of the current detecting device determines whether the detected current value is larger, smaller or invalid when the current detecting device is in an abnormal state according to the relationship between the power consumption of the at least one electric device and the upper and lower limits of the power data interval and the flag of the determining device of the current detecting device state on the state of the current detecting device. For example, if the current detection device detects that the power consumption of the charging and discharging equipment is not less than the upper limit of the power data interval within the target preset time, and the current detection device is in the first abnormal state, the current detection device state determination device determines that the current value detected by the current detection device is larger; if the power consumption power is not larger than the lower limit of the power data interval and the current detection device is in the second abnormal state, the current value detected by the current detection device is determined to be smaller by the current detection device state determination device; if the power consumption is not greater than the lower limit of the current data interval and the current detection device is in the third abnormal state, the determination device of the state of the current detection device determines that the current detection device has a fault, namely the current value detected by the current detection device is invalid. Optionally, the determining device of the state of the current detecting device may prompt according to whether the current value detected by the current detecting device is larger, smaller or invalid, for example, the at least one piece of electric equipment includes a display, and the current value detected by the current detecting device is larger, smaller or invalid, and is displayed on the display; for example, the determination device for determining the state of the detection device may limit the discharge current of the charge/discharge device to limit the power consumption of the at least one electric device according to whether the current value detected by the current detection device is large, small, or invalid. By implementing the embodiment, the accuracy of judging the detection result of the current detection device is further improved through the state of the mark of the current detection device and the relation between the current detected by the current detection device and the current data interval.

An embodiment of the present application further provides a system for determining a state of a current detection device, referring to fig. 5, and fig. 5 is a block diagram of a system for determining a state of a current detection device according to an embodiment of the present application. As shown in fig. 5, the system 50 for determining the state of the current detection device includes a device 500 for determining the state of the current detection device, a charging and discharging device 501, a current detection device 502, an electric device 503, a charging interface 504, and a power supply device 505, wherein:

the current detection device 502 is disposed between the charging and discharging device 501 and an external device, and the external device includes the electric equipment 503, a charging interface 504, and a power supply device 505. The powered device 503 comprises at least one powered device, such as a first electrical device 5030 and/or a second electrical device 5031; the current detection device 502 and the current detection device state determination device 500 have a connection relationship, and the current detection device state determination device 500 performs current sampling on the current detected by the current detection device 502 to the charging and discharging equipment 501; the charging and discharging equipment 501 and the current detection device state determining device 500 have a connection relation, and the current detection device state determining device 500 performs voltage sampling on the voltage of the charging and discharging equipment 501; the power supply device 505 outputs a charging current to the charging and discharging device 501 through the charging interface 504, and the determining device 500 of the current detecting device status communicates with the electric device 503 and the power supply device 505 through a communication bus. The determination device 500 of the current detection device state may be a central processing unit, the charging and discharging device 501 may be formed by connecting at least one battery unit in a series-parallel connection manner, the current detection device 502 may include an instrument such as a hall current sensor, an ammeter and/or a multimeter, and the like, the power supply device 505 may output an alternating current or a direct current, and if the power supply device 505 outputs a direct current, the direct current output by the power supply device 505 may charge the charging and discharging device 501 through the charging interface 504; if the power supply device outputs an ac current, the charging interface 504 has a function of converting ac into dc, and supplies the dc current to the charging and discharging device 501.

An embodiment of the present application provides a device for determining a state of a current detection device, and referring to fig. 6, fig. 6 is a block diagram of a structure of a device for determining a state of a current detection device provided in an embodiment of the present application. It should be noted that the current detection device is disposed between the charging and discharging device and at least one external device, and the current detection device is configured to detect a current between the charging and discharging device and the at least one external device, as shown in fig. 6, the determination device 60 for determining the state of the current detection device includes:

an obtaining module 600, configured to obtain a working state parameter of the at least one external device within a target preset time;

a determining module 601, configured to determine a corresponding operating state parameter interval according to the operating state parameter of the at least one external device and the at least one scaling factor;

the obtaining module 600 is further configured to obtain a working state parameter of the charging and discharging device within the target preset time;

the determining module 601 is further configured to determine that the current detecting device is in a normal state when the working state parameter of the charging and discharging device is within the working state parameter interval;

the determining module 601 is further configured to determine that the current detecting device is in an abnormal state when the operating state parameter of the charge and discharge device is outside the corresponding operating state parameter interval;

the determining module 601 is further configured to determine the power data interval according to the power consumption of the at least one electrical device within the target preset time, the first scaling factor and the second scaling factor; the upper limit of the power data interval is determined according to the power consumption and the first proportional coefficient, and the lower limit of the power data interval is determined according to the power consumption and the second proportional coefficient;

the obtaining module 600 is further configured to obtain a discharge voltage of the charge and discharge device within the target preset time and a discharge current of the charge and discharge device detected by the current detecting device;

the determining module 601 is further configured to determine the discharge power of the charge and discharge device within the target preset time according to the discharge voltage and the discharge current;

the determining module 601 is further configured to determine that the current detecting device is in a normal state when the discharging power of the charging and discharging device in the target preset time is within the power data interval;

the determining module 601 is further configured to determine that the current detecting device is in an abnormal state when the discharging power of the charging and discharging device in the target preset time is outside the power data interval.

In a possible implementation, the current detection device status determination device 60 further includes a marking module 602 and a detection module 603;

the marking module 601 is configured to mark that the current detection device is in a first abnormal state when the discharge power of the charge and discharge equipment within the target preset time is not less than the upper limit of the power data interval;

the detecting module 603 is configured to detect whether discharge currents of the charge and discharge device within the target preset time are all greater than an initial standing current under the condition that the discharge power of the charge and discharge device within the target preset time is not greater than a lower limit of the power data interval, if yes, the marking module 602 marks that the current detecting device is in a second abnormal state, and otherwise, the marking module 602 marks that the current detecting device is in a third abnormal state.

the determining module 601 is further configured to determine a current data interval according to the power supply current, the third proportionality coefficient, and the fourth proportionality coefficient, which are sent to the charge and discharge device by the power supply device within the target preset time; the upper limit of the current data interval is determined according to the power supply current and the third proportionality coefficient; the lower limit of the current data interval is determined according to the power supply current and the fourth proportionality coefficient;

the obtaining module 600 is further configured to obtain a charging current of the charging and discharging device detected by the current detecting apparatus within the target preset time;

the determining module 601 is further configured to determine that the current detecting device is in the normal state when the current detecting device detects that the charging current of the charging and discharging device is within the current data interval within the target preset time;

the determining module 601 is further configured to determine that the current detecting device is in an abnormal state when the current detecting device detects that the charging current of the charging and discharging device is outside the current data interval within the target preset time.

In another possible implementation manner, the marking module 602 is further configured to mark that the current detection apparatus is in a first abnormal state when the current detection apparatus detects that the charging current of the charging and discharging device is not less than the upper limit of the current data interval within the target preset time;

the detecting module 603 is further configured to detect whether the charging currents are all greater than an initial standing current under the condition that the charging current is not greater than a lower limit of the current data interval, if so, the marking module 602 marks that the current detecting device is in a second abnormal state, otherwise, the marking module 602 marks that the current detecting device is in a third abnormal state.

Further, the determining module 601 is further configured to determine that the current value detected by the current detecting device is larger when the charging current is not smaller than the upper limit of the current data interval and the current detecting device is in the first abnormal state;

the determining module 601 is further configured to determine that the current value detected by the current detecting device is smaller when the charging current is not greater than the lower limit of the current data interval and the current detecting device is in the second abnormal state;

the determining module 601 is further configured to determine that the current detecting device has a fault when the charging current is not greater than the lower limit of the current data interval and the current detecting device is in the third abnormal state.

Optionally, the current detection device status determination device 60 further includes a sending module 604;

the sending module 604 is configured to send an adjustment instruction to the power supply device when the voltage of the charge and discharge device is not less than a preset first voltage, where the adjustment instruction is an instruction to adjust an output current of the power supply device to a target current;

under the condition that the output voltage of the charging and discharging equipment rises to a preset second voltage within a first preset time after the adjustment instruction is sent out, the detection module 603 performs detection on whether the charging currents of the charging and discharging equipment within the target preset time are all larger than an initial standing current.

An embodiment of the present application further provides a vehicle, where the vehicle includes a current detection device and an on-vehicle battery, and further includes the device for determining the state of the current detection device described above with reference to fig. 6, where the charging and discharging device is the on-vehicle battery. It will be appreciated that the vehicle may carry out any one of the possible method steps described above in connection with figures 1 to 5.

Referring to fig. 7, fig. 7 is a block diagram of an electronic device according to an embodiment of the present disclosure. As shown in fig. 7, the electronic device 70 comprises a transceiver 700, a processor 701, and a memory 702, wherein:

the transceiver 700 is configured to receive power consumption sent by at least one electric device and a power supply current value sent by the power supply device, and the processor 701 may be a Central Processing Unit (CPU), or may be another general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 702 stores instructions, and it is understood that the memory 702 stores the at least one scaling factor and/or the initial resting current value. Illustratively, the memory 702 may include both read-only memory and random-access memory, and provides instructions and data to the processor 701 and the transceiver 700. A portion of the memory 702 may also include non-volatile random access memory. For example, the memory 702 may also store device type information.

The processor 701 is configured to execute the computer program stored in the memory, so as to implement any one of the possible embodiments described above.

In a specific implementation, the electronic device may execute, through each built-in functional module, the implementation manners provided in the steps in fig. 1 to fig. 5, which may be specifically referred to the implementation manners provided in the steps in fig. 1 to fig. 5, and are not described herein again.

The present application provides a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform any one of the possible embodiments described above.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the embodiments provided in the present application, it should be understood that the disclosed method, apparatus, and system may be implemented in other ways. The above-described embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for determining a state of a current detection device, wherein the current detection device is disposed between a charging and discharging apparatus and at least one external apparatus, and the current detection device is configured to detect a current between the charging and discharging apparatus and the at least one external apparatus, the method comprising:

2. The method according to claim 1, wherein the at least one external device is a powered device, and the charging and discharging device is in a discharging state; the working state parameter is power, and the working state parameter interval is a power data interval;

3. The method according to claim 2, wherein the determining that the current detection device is in the abnormal state if the discharging power of the charging and discharging device within the target preset time is outside the power data interval comprises:

4. The method according to claim 1, wherein the at least one external device is a power supply device, and the charging and discharging device is in a charging state; the working state parameter is current, and the working state parameter interval is a current data interval;

5. The method according to claim 4, wherein if the current detection device detects that the charging current of the charging and discharging device is outside the current data interval within the target preset time, determining that the current detection device is in an abnormal state comprises:

6. The method of claim 5, further comprising:

7. The method of claim 5 or 6, wherein said detecting whether the charging currents are both greater than an initial rest current comprises:

8. A device for determining a state of a current detection device provided between a charge/discharge apparatus and at least one external device, the current detection device being configured to detect a current flowing between the charge/discharge apparatus and the at least one external device, the device for determining a state of a current detection device comprising:

the determining module is further configured to determine that the current detection device is in an abnormal state when the operating state parameter of the charge and discharge device is outside the corresponding operating state parameter interval.

9. An electronic device, characterized in that the electronic device comprises a processor and a memory, wherein the processor is configured to execute a computer program stored in the memory to implement the steps of the method according to any one of claims 1 to 7.

10. A vehicle comprising a current detection device and an on-vehicle battery, and further comprising a device for determining a state of the current detection device according to claim 8, wherein the charge and discharge device is the on-vehicle battery.