CN211123027U - Current detection device and electronic equipment - Google Patents
Current detection device and electronic equipment Download PDFInfo
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- CN211123027U CN211123027U CN201922128922.1U CN201922128922U CN211123027U CN 211123027 U CN211123027 U CN 211123027U CN 201922128922 U CN201922128922 U CN 201922128922U CN 211123027 U CN211123027 U CN 211123027U
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Abstract
The utility model discloses a current detection device and electronic equipment for solve the problem that prior art can't detect when electronic equipment is in standby or shutdown state supply current value. The current detection device includes: power protection module and current detection module, wherein: the current detection module comprises an analog-to-digital converter, a digital latch and a signal conversion module; the current detection module is connected with the power supply protection module; the two ends of the analog-to-digital converter are respectively connected with the two ends of the signal conversion module, and the analog-to-digital converter is used for acquiring signals at the two ends of the signal conversion module and converting the signals at the two ends of the signal conversion module into numerical signals; the analog-to-digital converter is connected with the digital latch, and the digital latch is used for receiving and storing the numerical value signal converted by the analog-to-digital converter.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to a current detection device and electronic equipment.
Background
With the rapid development of electronic devices, in order to avoid abnormal power consumption of the electronic devices, a sampling resistor is often added to a fuel gauge module of the electronic devices to perform sampling detection on a power supply voltage, so as to obtain a current value of a power supply. When the electronic equipment is in a working state, the central processing unit can control the fuel gauge module to detect the voltage value of the sampling resistor, and current values such as a charging current value and a discharging current value of the power supply are obtained.
However, when the electronic device is in a standby state or a power-off state, the electronic device cannot obtain the current value of the power supply because the central processing unit is in a low power consumption state. At this time, if the electronic device is knocked or affected with damp, some devices may fail and generate leakage current, and the central processing unit cannot know that some devices generate leakage current, so that the abnormal power consumption condition of the electronic device cannot be fed back to the user.
Therefore, how to obtain the current value of the power supply when the electronic device is in a standby or off state still needs a further solution.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a current detection device to solve prior art and can't acquire the problem that power current value was in when standby or shutdown state to electronic equipment.
In order to solve the technical problem, the utility model discloses a realize like this:
in a first aspect, an embodiment of the present invention provides a current detection apparatus, including: power protection module and current detection module, wherein:
the current detection module comprises an analog-to-digital converter, a digital latch and a signal conversion module;
the current detection module is connected with the power supply protection module;
the two ends of the analog-to-digital converter are respectively connected with the two ends of the signal conversion module, and the analog-to-digital converter is used for acquiring signals at the two ends of the signal conversion module and converting the signals at the two ends of the signal conversion module into numerical signals;
the analog-to-digital converter is connected with the digital latch, and the digital latch is used for receiving and storing the numerical value signal converted by the analog-to-digital converter.
In a second aspect, an embodiment of the present invention further provides an electronic device, including the current detection apparatus provided in the first aspect,
the embodiment of the utility model provides a detection apparatus for electric current, include: power protection module and current detection module, wherein: the current detection module comprises an analog-to-digital converter, a digital latch and a signal conversion module; the current detection module is connected with the power supply protection module; the two ends of the analog-to-digital converter are respectively connected with the two ends of the signal conversion module, and the analog-to-digital converter is used for acquiring signals at the two ends of the signal conversion module and converting the signals at the two ends of the signal conversion module into numerical value signals; the analog-to-digital converter is connected with the digital latch, and the digital latch is used for receiving and storing the numerical value signal converted by the analog-to-digital converter.
Therefore, when the electronic equipment is in a standby state or a shutdown state, the central processing unit can acquire signals at two ends of the signal conversion module by controlling the analog-to-digital converter, so that the analog-to-digital converter converts the signals into numerical signals and stores the numerical signals into the digital latch, and when the electronic equipment is switched to a working state, whether the electric leakage condition exists in the power supply when the electronic equipment is in the standby state or the shutdown state can be accurately determined by acquiring the numerical signals which are stored in the digital latch and represent the voltage values at two ends of the signal conversion module.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a current detection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery of an electronic device in an embodiment of the present invention;
fig. 3 is a schematic diagram of a detailed structure of a current detection device according to an embodiment of the present invention.
Detailed Description
For solving the problem that prior art can't detect when electronic equipment is in shutdown or state supply current value, the utility model provides a current detection device, this current detection device includes: power protection module and current detection module, wherein: the current detection module comprises an analog-to-digital converter, a digital latch and a signal conversion module; the current detection module is connected with the power supply protection module; the two ends of the analog-to-digital converter are respectively connected with the two ends of the signal conversion module, and the analog-to-digital converter is used for acquiring signals at the two ends of the signal conversion module and converting the signals at the two ends of the signal conversion module into numerical value signals; the analog-to-digital converter is connected with the digital latch, and the digital latch is used for receiving and storing the numerical value signal converted by the analog-to-digital converter.
Adopt the embodiment of the utility model provides a current detection device, when electronic equipment is in standby or shutdown state, central processing unit accessible control analog to digital converter acquires the signal at signal conversion module both ends, make analog to digital converter convert signal to numerical signal and save to digital latch, so that when electronic equipment switches to operating condition, through the numerical signal who acquires the representation signal conversion module both ends voltage value of storage in the digital latch, alright whether the electric leakage condition exists in the power when confirming electronic equipment is in standby or shutdown state accurately.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the circuit obtaining apparatus includes a power protection module M1 and a current detection module M2, wherein the current detection module M2 includes an analog-to-digital converter ADC, a digital latch L and a signal conversion module M3, the current detection module M2 is connected to the power protection module M1, two ends of the analog-to-digital converter ADC are respectively connected to two ends of the signal conversion module M3, the analog-to-digital converter ADC is configured to obtain signals at two ends of the signal conversion module M3 and convert the signals at two ends of the signal conversion module M3 into numerical signals, the analog-to-digital converter ADC is connected to the digital latch L, and the digital latch L is configured to receive and store the numerical signals converted by the analog-to-digital converter ADC.
Optionally, the embodiment of the present invention provides a current detection apparatus, which further includes an ammeter V for obtaining a current value passing through a power supply when the electronic device is in an operating state. Specifically, as shown in fig. 1, one end of the signal conversion module M3 is connected to the power protection module M1; two ends of the fuel gauge V are respectively connected with two ends of the signal conversion module M3 and are used for acquiring signals at two ends of the signal conversion module M3; the central processing unit CPU is connected to the fuel gauge V, and is configured to obtain signals at two ends of the signal conversion module M3 collected by the fuel gauge V, convert the signals into a current value, and further obtain a current value flowing through the signal conversion module.
Taking a battery as an example of a power supply of an electronic device, as shown in fig. 2, it is a structural schematic diagram of a battery of an electronic device provided by an embodiment of the present invention, and the battery mainly includes a battery core and a battery protection board. The battery core is connected with the battery protection board, C + and C-are voltages of the battery core, and P + and P-are output voltages of the whole battery to the electronic equipment. The embodiment of the utility model provides a current detection device shown in fig. 1 can set up in the battery protection shield in fig. 2.
Optionally, in order to protect the power supply of the electronic device, prevent the overcharge and overdischarge of the power supply, the embodiment of the present invention provides a current detection apparatus, which further includes a power protection module M1, wherein one end of the power protection module M1 is connected to the battery cell, and the other end of the power protection module M2 is connected to the current detection module.
Specifically, as shown in fig. 3, a detailed structural schematic diagram of the current device according to the embodiment of the present invention is provided. The power protection module M1 includes a protection chip set IC, a protection capacitor C, a first resistor R1, a second resistor R2, a first MOS transistor G1, a second MOS transistor G2, a first diode D1, and a second diode D2; two ends of the protection capacitor C are respectively connected with two ends of the protection chip set IC; the first resistor R1 and the second resistor R2 are respectively connected with the protection chip set IC; the protection chip set IC is respectively connected with the gate of the first MOS transistor G1 and the gate of the second MOS transistor G2.
In addition, the source of the first MOS transistor G1 is connected to the anode of the first diode D1, and the drain of the first MOS transistor G1 is connected to the cathode of the first diode D1; the source of the second MOS transistor G2 is connected to the cathode of the second diode D2, and the drain of the second MOS transistor G2 is connected to the anode of the second diode D2; the drain electrode of the first MOS tube G1 is connected with the source electrode of the second MOS tube G2; one end of the first resistor R1 is connected to one end of the protection capacitor C.
In general, because the load of the electronic device in the operating state is unstable, the dispersion of the voltage values across the signal conversion module M3 obtained by the electricity meter V is high, and therefore the CPU cannot accurately determine whether the electronic device has an electric leakage condition. In order to solve the problem, the embodiment of the utility model provides an in central processing unit CPU accessible analysis electronic equipment be in standby or the current value when the power off state, improve central processing unit CPU and judge whether there is the degree of accuracy of the electric leakage condition in electronic equipment.
In order to enable the electronic device to obtain the current value of the power supply in the standby or shutdown state, so as to determine whether the power supply of the electronic device is abnormal or not in the standby or shutdown state, the current detection module M2 in the embodiment of the present invention may specifically include an analog-to-digital converter ADC for obtaining the voltage across the signal conversion module M3, and a digital latch L for storing data acquired by the analog-to-digital converter ADC, specifically, as shown in fig. 3, the current detection module M2 provided in the embodiment of the present invention includes an analog-to-digital converter ADC, a digital latch L, an electricity meter V, and a signal conversion module M3, and the current detection module M2 is connected to the power protection module M1.
Specifically, the signal conversion module M3 includes at least one of:
sampling a resistor;
a mirror current source;
a current sensing system.
When the signal conversion module M3 is a sampling resistor, the analog-to-digital converter ADC and the fuel gauge V can detect the voltage values at the two ends of the sampling resistor; when the signal conversion module M3 is a mirror current source or a current detection system, the analog-to-digital converter ADC can obtain a current value of the mirror current source or the current detection system.
It should be understood that, in order to be able to send a signal to the current detection module M2, the trigger current detection module M2 acquires the signal at both ends of the signal conversion module M3 in time, and triggers the digital latch L to send a stored value signal in time, the embodiment of the present invention provides an apparatus further including a central processing unit.
The analog-to-digital converter ADC is connected with the central processing unit CPU, and the central processing unit CPU sends a control signal EN to the analog-to-digital converter ADC so as to trigger the analog-to-digital converter ADC to acquire signals at two ends of the signal conversion module M3;
the central processing unit CPU is connected with the digital latch L, and the digital latch L is used for sending the stored numerical value signal to the central processing unit CPU;
the central processor CPU is arranged to send an output signal S to the digital latch L to trigger the digital latch L to send the stored value signal to the central processor CPU.
Optionally, in the embodiment of the present invention, the analog-to-digital converter ADC capable of implementing the essential functions of the analog-to-digital converter ADC can be selected. Specifically, the model of the analog-to-digital converter ADC includes at least one of the following:
AD677；
AD7715；
ADS832；
ADS7812；
ADS7835。
the embodiment of the utility model provides a detection apparatus for electric current, include: power protection module and current detection module, wherein: the current detection module comprises an analog-to-digital converter, a digital latch and a signal conversion module; the current detection module is connected with the power supply protection module; the two ends of the analog-to-digital converter are respectively connected with the two ends of the signal conversion module, and the analog-to-digital converter is used for acquiring signals at the two ends of the signal conversion module and converting the signals at the two ends of the signal conversion module into numerical value signals; the analog-to-digital converter is connected with the digital latch, and the digital latch is used for receiving and storing the numerical value signal converted by the analog-to-digital converter.
Therefore, when the electronic equipment is in a standby state or a shutdown state, the central processing unit can acquire signals at two ends of the signal conversion module by controlling the analog-to-digital converter, so that the analog-to-digital converter converts the signals into numerical signals and stores the numerical signals into the digital latch, and when the electronic equipment is switched to a working state, whether the electric leakage condition exists in the power supply when the electronic equipment is in the standby state or the shutdown state can be accurately determined by acquiring the numerical signals which are stored in the digital latch and represent the voltage values at two ends of the signal conversion module.
The embodiment of the utility model provides a still provide an electronic equipment, this electronic equipment can include the aforesaid current detection device. It should be understood that the electronic device includes, but is not limited to, at least one of a mobile phone, a wearable device, a computer, and the like in practical applications.
Alternatively, when the electronic device is in an operating state, that is, when the user uses the electronic device, in order to obtain the current value of the power supply in the operating state, the central processing unit CPU may first send a high-level control signal EN to the fuel gauge V; then, the fuel gauge V acquires a signal of the signal conversion module M3 in response to the control signal EN; finally, the electricity meter V may send the acquired signal to the central processing unit CPU, so that the central processing unit CPU can obtain a current value of the power supply based on the signal of the sampling resistance signal conversion module M3 acquired by the electricity meter V, and further determine whether the electronic device is consuming power abnormally, that is, whether the electronic device has an electric leakage condition.
Specifically, the central processing unit CPU may determine whether there is a leakage condition of the electronic device based on the acquired current value and a preset current value threshold. In practical applications, the preset current threshold may be set according to a maximum current value flowing through the signal conversion module M3 when the electronic device works, for example, the preset current threshold may be 200mA or 500 mA. And if the acquired current value is obviously deviated from the preset current threshold, determining that the electric leakage condition exists in the electronic equipment.
It should be understood that, when the electronic device is in a standby state or a shutdown state, since the central processing unit CPU is in a low power consumption state, it is not possible to send the high-level control signal EN to the fuel gauge V, and it is not possible to obtain the current value of the power supply through the fuel gauge V.
Optionally, in order to enable the electronic device to be in a standby state or a shutdown state, the current value of the power supply can still be obtained, in an embodiment of the present invention, when the electronic device is in the standby state or the shutdown state, the control signal EN can be sent to the analog-to-digital converter ADC through the central processing unit CPU;
the analog-to-digital converter ADC responds to the control signal EN to acquire signals at two ends of the signal conversion module M3 and convert the signals into numerical signals;
the analog-to-digital converter ADC sends the value signal to the digital latch L so that the digital latch L receives and stores the value signal.
Specifically, when the electronic device is in a standby state or a shutdown state, the central processing unit CPU can send a low-level control signal EN to the analog-to-digital converter ADC, and the analog-to-digital converter ADC, in response to the low-level control signal EN, acquires signals at two ends of the signal conversion module M3 and converts the signals into numerical signals so as to facilitate storage of the digital latch L, and then sends the converted numerical signals to the digital latch L, so that the digital latch L can store the numerical signals representing voltage values at two ends of the signal conversion module M3, and the central processing unit can read the numerical signals corresponding to the voltage values at two ends of the signal conversion module M3 from the digital latch L.
Optionally, after the digital latch L stores the numerical value signal corresponding to the voltage value at the two ends of the signal conversion module M3, in order to enable the central processing unit CPU to extract and analyze the numerical value signal, in the embodiment provided by the present invention, when the electronic device is in the working state, the central processing unit CPU sends the output signal S to the digital latch L;
the digital latch L signals the stored value to the central processing unit CPU in response to the output signal S.
Optionally, after the central processing unit CPU obtains the numerical signals corresponding to the signals at the two ends of the signal conversion module M3, in order to determine whether the electronic device has an electric leakage condition through the central processing unit CPU, in an embodiment of the present invention, the central processing unit CPU specifically obtains the current values at the two ends of the signal conversion module M3 based on the numerical signals;
the central processing unit CPU determines whether the electronic device has an electric leakage condition based on the current value at both ends of the signal conversion module M3 and a preset current threshold.
In practical applications, the preset current threshold may be set according to a maximum current value flowing through the signal conversion module M3 when the electronic device is in a standby state or a power-off state, for example, when the electronic device is a mobile phone, the preset current threshold may be 5mA or the like when the mobile phone is in the standby state; when the mobile phone is in a power-off state, the preset current threshold may be 1mA, and the like.
Optionally, when the signal conversion module M3 is a sampling resistor, the analog-to-digital converter ADC and the fuel gauge V may detect a voltage value at two ends of the sampling resistor, and convert the voltage value into a current value through the central processing unit CPU, so as to determine whether the current value is significantly deviated from a preset current threshold.
When the signal conversion module M3 is a mirror current source, the analog-to-digital converter ADC may obtain a current value output by the mirror current source, where the current value is generally 1/N times of a current value of the battery power supply, and then the central processing unit CPU may multiply the current value output by the mirror current source by N to obtain a real current value of the battery power supply, and then determine whether the real current value is obviously biased to a preset current threshold.
When the signal conversion module M3 is a current detection system, the analog-to-digital converter can obtain the current value output by the current detection system, and then the central processing unit CPU can determine whether the current value of the battery power supply obviously deviates from the preset current threshold value based on the current value.
Optionally, judge the degree of accuracy that whether electronic equipment exists the electric leakage condition in order to improve central processing unit CPU, the embodiment of the utility model provides a still can be based on a plurality of electronic equipment in the historical time quantum, all standby current values when standby and/or shutdown and the real electric leakage condition, the training obtains the electric leakage and acquires the model to whether there is the electric leakage condition electronic equipment based on this electric leakage detection model determination. Specifically, in the embodiment of the present invention, the CPU determines whether the electronic device has an electric leakage condition based on the numerical signal and the electric leakage detection model;
the leakage detection model is obtained by training signals at two ends of the corresponding signal conversion module M3 and the corresponding leakage condition when a plurality of electronic devices are in standby and/or shutdown in a historical time period.
For example, taking an electronic device as a mobile phone as an example, all standby current values and real leakage situations of the mobile phone in a standby state when a plurality of users use a plurality of mobile phones of the same type in a past period of time, such as a past week or a past month, may be recorded, and a leakage detection model may be trained based on all standby current values and real leakage situations of the plurality of users using the plurality of mobile phones of the same type in a past period of time when the mobile phones of the same type are in a standby state.
After the central processing unit CPU obtains a numerical signal corresponding to the current value flowing through the signal conversion module when the mobile phone is in the standby state, the numerical signal may be first converted into a corresponding current value, and then the current value is input into the leakage detection model to output the leakage detection result.
The electronic equipment provided by the embodiment of the utility model comprises the current detection device, and when the electronic equipment is in a standby state or a shutdown state, the central processing unit sends a control signal to the analog-to-digital converter; the analog-to-digital converter responds to the control signal, obtains signals at two ends of the signal conversion module and converts the signals into numerical value signals; the analog-to-digital converter sends the value signal to the digital latch so that the digital latch receives and stores the value signal.
When the electronic device is in a standby state or a shutdown state, the central processing unit CPU may control the analog-to-digital converter ADC to obtain signals at two ends of the signal conversion module M3, so that the analog-to-digital converter ADC converts the signals into numerical signals and stores the numerical signals in the digital latch L, so that when the electronic device is switched to a working state, it may be determined whether the electronic device has an electrical leakage condition by obtaining the numerical signals stored in the digital latch L and representing the voltage values at two ends of the signal conversion module M3.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.
Claims (8)
1. A current detecting device, comprising: power protection module and current detection module, wherein:
the current detection module comprises an analog-to-digital converter, a digital latch and a signal conversion module;
the current detection module is connected with the power supply protection module;
the two ends of the analog-to-digital converter are respectively connected with the two ends of the signal conversion module, and the analog-to-digital converter is used for acquiring signals at the two ends of the signal conversion module and converting the signals at the two ends of the signal conversion module into numerical signals;
the analog-to-digital converter is connected with the digital latch, and the digital latch is used for receiving and storing the numerical value signal converted by the analog-to-digital converter.
2. The apparatus of claim 1, wherein the current sensing apparatus further comprises a central processing unit,
the analog-to-digital converter is connected with the central processing unit, and the central processing unit sends a control signal to the analog-to-digital converter so as to trigger the analog-to-digital converter to acquire signals at two ends of the signal conversion module.
3. The apparatus of claim 2,
the central processing unit is connected with the digital latch, and the digital latch is used for sending the stored numerical value signal to the central processing unit.
4. The apparatus of claim 3,
and the central processing unit is used for sending an output signal to the digital latch so as to trigger the digital latch to send the stored numerical value signal to the central processing unit.
5. The apparatus of claim 1, wherein the power protection module comprises a protection chip set, a protection capacitor, a first resistor, a second resistor, a first MOS transistor, a second MOS transistor, a first diode, and a second diode;
two ends of the protection capacitor are respectively connected with two ends of the protection chip set;
the first resistor and the second resistor are respectively connected with the protection chip set;
the protection chip set is respectively connected with the grid electrode of the first MOS tube and the grid electrode of the second MOS tube;
the source electrode of the first MOS tube is connected with the anode of the first diode, and the drain electrode of the first MOS tube is connected with the cathode of the first diode;
the source electrode of the second MOS tube is connected with the cathode of the second diode, and the drain electrode of the second MOS tube is connected with the anode of the second diode;
and the drain electrode of the first MOS tube is connected with the source electrode of the second MOS tube.
6. The apparatus of claim 1, wherein the signal conversion module comprises at least one of:
sampling a resistor;
a mirror current source;
a current sensing system.
7. The apparatus of claim 1, wherein the analog-to-digital converter model comprises at least one of:
AD677；
AD7715；
ADS832；
ADS7812；
ADS7835。
8. an electronic device comprising the current detection device according to any one of claims 1 to 7.
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| TWI745087B (en) * | 2020-09-18 | 2021-11-01 | 廣達電腦股份有限公司 | Smart battery device and operating method thereof |
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| TWI745087B (en) * | 2020-09-18 | 2021-11-01 | 廣達電腦股份有限公司 | Smart battery device and operating method thereof |
| JP2022051491A (en) * | 2020-09-18 | 2022-03-31 | 廣達電腦股▲ふん▼有限公司 | Smart battery device and operating method thereof |
| JP7138206B2 (en) | 2020-09-18 | 2022-09-15 | 廣達電腦股▲ふん▼有限公司 | Smart battery device and its operation method |
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