CN205958635U - Gather electronic equipment's battery voltage's device - Google Patents
Gather electronic equipment's battery voltage's device Download PDFInfo
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- CN205958635U CN205958635U CN201620788619.8U CN201620788619U CN205958635U CN 205958635 U CN205958635 U CN 205958635U CN 201620788619 U CN201620788619 U CN 201620788619U CN 205958635 U CN205958635 U CN 205958635U
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- cell voltage
- circuit
- control unit
- bleeder circuit
- nmos tube
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Abstract
The utility model discloses a gather electronic equipment's battery voltage's device, the device includes: little the control unit, switch circuit and bleeder circuit, the battery voltage output is connected to switch circuit's input, and bleeder circuit's voltage sample end, bleeder circuit other end ground connection are connected to the output, the parallelly connected electric capacity in bleeder circuit both ends, little the control unit's control signal output pin is connected with switch circuit's control end, and the sampled signal input pin connects with switch circuit's output and bleeder circuit's voltage sample end altogether, little the control unit sends a control signal and makes switch circuit turns when presetting the arrival of sampling time point to charge to energy -storage capacitor, the time delay is behind the schedule time, gathers the battery voltage original value and send the 2nd control signal through the sampled signal input pin to make it close for switch circuit, and compensation battery voltage original value is preserved after obtaining the battery voltage calibration value. The utility model discloses greatly reduced the circuit consumption, and guaranteed to gather accuracy and the stability of result.
Description
Technical field
The utility model is related to technical field of electronic equipment and in particular to a kind of dress of the cell voltage of collection electronic equipment
Put.
Background technology
Increasingly popularize with electronic equipments such as Intelligent bracelet, the stand-by time of Intelligent bracelet be one of product very heavy
The index wanted, stand-by time length can reduce the number of times charging during product uses, conversely, frequently charging, has a strong impact on
The Experience Degree of product.And the collection of the cell voltage of electronic equipment is one requisite function of Intelligent bracelet class product.
In prior art, battery voltage acquisition typically has two ways：One kind is directly to gather battery electricity by divider resistance
Pressure, this mode typically reduces leakage current thus reducing the mesh of Acquisition Circuit power consumption by the resistance increasing divider resistance
, but the increasing that divider resistance can not be random, because excessive divider resistance can affect the impedance of microcontroller input, from
And affect the accuracy of collection result, and because there is leakage current power consumption is relatively large in this mode always.Other one
Plant is can to open the switch elements such as the metal-oxide-semiconductor of shutoff by increase on divider resistance path, to reduce Acquisition Circuit work(
The purpose of consumption.But this method needs controlling switch pipe and gathers the cell voltage opening moment, easily causes voltage pulsation,
Cause collection result error big, inaccurate.
As can be seen here, battery voltage acquisition mode power consumption height of the prior art, the degree of accuracy are low, and stability is poor.
Utility model content
The utility model provides a kind of device of the cell voltage of collection electronic equipment, of the prior art for solving
Battery voltage acquisition mode power consumption is high, the degree of accuracy is low, the problem of stability difference.
In order to achieve the above object, the technical solution of the utility model is realized in：
According to one side of the present utility model, there is provided a kind of device of the cell voltage of collection electronic equipment, this dress
Put including：Micro-control unit and on-off circuit and bleeder circuit,
The input of on-off circuit connects the cell voltage output end of electronic equipment, and output end connects the electricity of bleeder circuit
Pressure sampling end, the other end ground connection of bleeder circuit；Two ends parallel connection one storage capacitor of bleeder circuit；
The control signal output pin of micro-control unit is connected with the control end of on-off circuit, the sampling letter of micro-control unit
Number input pin is connect altogether with the output end of on-off circuit and the voltage sample end of bleeder circuit；
Micro-control unit, for when default sampling time point arrives, sending the first control to the control end of on-off circuit
Signal so that on-off circuit conducting form battery voltage sampling loop with bleeder circuit and storage capacitor is charged,
After delay predetermined time, the cell voltage original value that bleeder circuit collects is received by sampled signal input pin, and passes through
Control signal output pin sends the second control signal to on-off circuit so that on-off circuit cuts out；And, for this battery
Voltage original value compensates, and the cell voltage calibration value after being compensated preserves.
Alternatively, micro-control unit, specifically for according to the cell voltage original value corresponding sampling time, by cell voltage
Calibration value order is saved in a push-up storage with set depth；
Micro-control unit, is additionally operable to when receiving cell voltage output order, to electricity existing in push-up storage
Cell voltage calibration value carries out calculating of averaging, and calculated mean value is exported simultaneously as current cell voltage output valve
Preserve.
Alternatively, micro-control unit, is additionally operable to, before exporting current cell voltage output valve, obtain electronic equipment
The charge/discharge state of battery, and the cell voltage output valve of current cell voltage output valve and last output is compared
Relatively, judge whether to meet corresponding cell voltage output condition under charge/discharge state, be then, by current cell voltage output
Value exports and preserves, and otherwise, is replaced defeated after current cell voltage output valve using the cell voltage output valve of last output
Go out.
Alternatively it is characterised in that the depth-set of push-up storage is 8,
Micro-control unit, specifically for, after 2 milliseconds of time delay, receiving bleeder circuit collection by sampled signal input pin
The cell voltage original value arriving, and 0.06V, the cell voltage calibration value after being compensated are compensated to cell voltage original value.
Alternatively, on-off circuit includes a NMOS tube, a pull-up resistor, a commutation diode and a bi-directional voltage stabilizing two pole
Pipe, bleeder circuit is a divider resistance；
The grid of NMOS tube is control end, connects with the cell voltage output end of electronic equipment after drain electrode concatenation pull-up resistor
Connect, source electrode connects the voltage sample end of divider resistance and the sampled signal input pin of micro-control unit respectively；
Commutation diode is connected between the source electrode of NMOS tube and drain electrode, and its positive pole is connected with the source electrode of NMOS tube, negative pole
It is connected with the drain electrode of NMOS tube；
Bi-directional voltage stabilizing diode is connected between the grid of NMOS tube and source electrode, and one positive pole is connected with the grid of NMOS tube
Connect, another positive pole is connected with the source electrode of NMOS tube.
The beneficial effects of the utility model are：Of the present utility model this collection electronic equipment the device of cell voltage and
Method, sends the first control signal to on-off circuit so that on-off circuit is led when needing to gather cell voltage by micro-control unit
Logical, and then complete the collection of cell voltage；And after the completion of collection, the second control signal closing switch is sent by micro-control unit
Circuit, thus when not gathering cell voltage, will not produce the collection side directly utilizing bleeder circuit in power consumption, with prior art
Formula is compared, and power consumption is extremely low.
Further, since pass through delay predetermined time in the utility model charging to storage capacitor, then gather battery electricity again
Pressure original value simultaneously compensates process to cell voltage original value, also ensure that the battery voltage value of output and the reality of cell voltage
Error between actual value is very little, improves the Stability and veracity of collection result.
Thus, the technical solution of the utility model application on an electronic device when the cell voltage stability that gathers and accurately
Property high, be experimentally verified that error range within 0.01V, and average power consumption be extremely low, substantially prolongs the standby use of whole machine
Time.
Brief description
Fig. 1 is a kind of block diagram of the device of cell voltage of collection electronic equipment of one embodiment of the utility model；
Fig. 2 is a kind of circuit diagram of the device of cell voltage of collection electronic equipment of one embodiment of the utility model；
Fig. 3 is the structure of push-up storage and the operation principle schematic diagram of one embodiment of the utility model；
Fig. 4 A is the battery charging curve schematic diagram of the electronic equipment of one embodiment of the utility model；
Fig. 4 B is the battery discharge curve schematic diagram of the electronic equipment of one embodiment of the utility model；
Fig. 5 is the flow chart of a kind of method of cell voltage of collection electronic equipment of one embodiment of the utility model；
Fig. 6 is the flow process of a kind of method of cell voltage of collection electronic equipment of another embodiment of the utility model
Figure.
Specific embodiment
Design concept of the present utility model is：Battery voltage acquisition mode power consumption for electronic equipment in prior art is high
And the problem that the collection result degree of accuracy is low, stability is poor, by using on-off circuit only need to gather cell voltage when
Wait and control battery voltage sampling loop works；When not gathering, battery voltage sampling loop does not work, thus not producing power consumption, phase
The ratio mode that there is leakage current in prior art using divider resistance always, this mode power consumption pole of the utility model embodiment
Low.In addition, for the cell voltage stability that may lead to during on-off circuit work and poor accuracy, the utility model embodiment
By using storage capacitor and coordinate the delay process of the micro-control unit and micro-control unit original battery voltage to collection
The compensation deals of value, it is achieved that improve the accuracy of collection result on the basis of reducing power consumption, reduce error.
Embodiment one
Fig. 1 is a kind of block diagram of the device of cell voltage of collection electronic equipment of one embodiment of the utility model, ginseng
See Fig. 1, the device 10 of the cell voltage of collection electronic equipment of the present embodiment includes micro-control unit 101 and on-off circuit
102 and bleeder circuit 103,
The input of on-off circuit 102 connects the cell voltage output end (not shown in figure 1) of electronic equipment, on-off circuit
102 output end connects the voltage sample end of bleeder circuit 103, the other end ground connection of bleeder circuit 103；Bleeder circuit 103
Two ends parallel connection one storage capacitor (not shown in figure 1)；
The control signal output pin of micro-control unit 101 is connected with the control end of on-off circuit 102, micro-control unit
101 sampled signal input pin is connect altogether with the voltage sample end of the output end of on-off circuit 102 and bleeder circuit 103；
Micro-control unit 101, for when default sampling time point arrives, sends the to the control end of on-off circuit 102
One control signal is so that on-off circuit 102 turns on and forms battery voltage sampling loop and to storage capacitor with bleeder circuit 103
It is charged, after delay predetermined time, the cell voltage that bleeder circuit 103 collects is received by sampled signal input pin
Original value, and the second control signal is sent to on-off circuit 102 so that on-off circuit 102 closes by control signal output pin
Close；And, for compensating to this cell voltage original value, the cell voltage calibration value after being compensated preserves.
Using shown in Fig. 1 device gather electronic equipment cell voltage when, by micro-control unit send first control letter
Number to on-off circuit, on-off circuit is turned on, and then complete the collection of cell voltage；And after the completion of collection, by microcontroller list
Unit sends the second control signal closing switch circuit, thus when not gathering cell voltage, not producing power consumption.In addition, by prolonging
When the scheduled time gather cell voltage original value again to after storage capacitor charging, and place is compensated to cell voltage original value
Reason, also ensure that the error between the battery voltage value of output and cell voltage actual value is very little, improves collection result
Stability and veracity, experiment proves that error range within 0.01V.
Embodiment two
Fig. 2 is a kind of circuit diagram of the device of cell voltage of collection electronic equipment of one embodiment of the utility model,
In the present embodiment, the circuit structure of the device of cell voltage of the collection electronic equipment to the utility model embodiment for the emphasis is carried out
Illustrate, other guide is referring to other embodiment of the present utility model.
Referring to Fig. 2, in the present embodiment, on-off circuit includes NMOS tube Q1, a pull-up resistor R1, a commutation diode D1
Zener diode D2 two-way with one, bleeder circuit is a divider resistance R2；
The grid of NMOS tube Q1 is connected with the control signal output pin ADC_EN of micro-control unit for control end, receives the
One control signal or the second control signal.
Cell voltage output end with electronic equipment after drain electrode concatenation (being connected in series) pull-up resistor R1 of NMOS tube Q1
VBAT connects, and source electrode connects the voltage sample end of divider resistance R2 and the sampled signal input pin BAT_ of micro-control unit respectively
LEVEL_ADC；
Commutation diode D1 is connected between the source electrode of NMOS tube Q1 and drain electrode, the positive pole of commutation diode D1 and NMOS tube
The source electrode of Q1 connects, and negative pole is connected with the drain electrode of NMOS tube Q1；
Bi-directional voltage stabilizing diode D2 is connected between the grid of NMOS tube Q1 and source electrode, one of bi-directional voltage stabilizing diode D2
Positive pole is connected with the grid of NMOS tube Q1, and another positive pole is connected with the source electrode of NMOS tube Q1.
The two ends parallel connection one storage capacitor C1 of divider resistance R1.
Referring to Fig. 2, the course of work of this circuit is：MCU (Micro Controller Unit, micro-control unit) is pre-
If when sampling time point arrives, high level signal is sent so that NMOS tube Q1 to the grid of NMOS tube Q1 by ADC_EN pin
Conducting simultaneously forms battery voltage sampling loop with divider resistance R1, carries out one-shot battery electricity with every 30s for the cycle in the present embodiment
Pressure collection, before collection voltages, NMOS tube Q1 is off state, starts first to open NMOS tube Q1 during collection, then time delay 2ms
(millisecond), this delay time is used for charging to electric capacity C1, because in non-voltage gatherer process, NMOS tube Q1 is off shape
State, collection voltages can discharge into 0V by resistance-capacitance circuit, according to the parameter of divider resistance R1 and storage capacitor C1, when time delay
Between pass through, when the voltage of storage capacitor C1 reaches 99%, by sampled signal input pin BAT_LEVEL_ADC receive partial pressure electricity
Cell voltage original value on resistance R1.
Here, the cell voltage original value of collection is analog signal, and MCU receives after analog signal through ADC (Analog-to-
Digital Converter, analog-digital converter) carry out analog-to-digital conversion, analog signal is switched to the digital quantity of cell voltage.MCU
After collecting cell voltage original value (i.e. the digital quantity of cell voltage), sent low by control signal output pin ADC_EN
Level signal, to NMOS tube Q1, makes NMOS tube Q1 close to save system power dissipation.Then, MCU is former to the cell voltage collecting
Initial value compensates, and the cell voltage calibration value after being compensated preserves.
It is emphasized that the cell voltage original figure amount that MCU collects is less than the battery voltage value of reality, its
Reason has two, and one is that time delay 2ms charges to electric capacity, leads to cell voltage to can only achieve the 99% of virtual voltage, two is MCU
ADC input pin has certain input impedance, causes collection voltages value in actual analog-digital conversion process low.Based on this, this reality
Apply example and process is compensated to the original value of cell voltage, to reduce the error between battery voltage acquisition result and actual value,
Preferably, according to drawing the offset that cell voltage original value is increased with 0.06V after many experiments, reason one is corresponding with reason two
Offset be respectively 0.03V.By compensation deals, improve the standard of the technical scheme collection result of the utility model embodiment
Exactness.
In addition, NMOS tube in the present embodiment on-off circuit can be substituted with other switch elements, for example, PMOS or
Triode, without limitation.
Embodiment three
Fig. 3 is the structure of push-up storage and the operation principle schematic diagram of one embodiment of the utility model, Fig. 4 A
It is the battery charging curve schematic diagram of the electronic equipment of one embodiment of the utility model, Fig. 4 B is one enforcement of the utility model
The battery discharge curve schematic diagram of the electronic equipment of example；Fill to improving collection in conjunction with emphasis in Fig. 3, Fig. 4 A, Fig. 4 B the present embodiment
The stability put illustrates, and other guide is referring to other embodiment of the present utility model.
Due to, in actual process, can have one between cell voltage original value and the result after ADC conversion
Determine the fluctuation of degree.Therefore, MCU, after obtaining cell voltage calibration value, need to be further processed to ensure the steady of collection result
Qualitative, improve the accuracy of collection result.The present embodiment adopts at fifo fifo (First In, First Out) algorithm
Manage the cell voltage calibration value obtaining.
Specific reference to Fig. 3, the depth setting FIFO buffer in the present embodiment represents actual acquisition battery electricity as 8, m
The number of pressure, the data (i.e. cell voltage calibration value) of collection moves according to direction from left to right shown in arrow, works as FIFO
The number of the battery voltage value in buffer is more than 8, and up-to-date data (e.g., newest Sample) moves into FIFO
During buffer, then oldest data (e.g., Sample1) is removed FIFO buffer and be dropped.
If MCU receives output order, m<8, then cell voltage output valve is equal to only sample value in FIFO buffer
Mean value, if MCU receives output order, m=8, then cell voltage output valve be equal to FIFO in eight sample values average
Value.
For example, bring into operation under state, in FIFO memory, may only store 3 sample values, at this moment MCU receives
Cell voltage output order, then MCU one mean value are calculated to 3 sample values of this in FIFO memory, and will calculate
The mean value arriving, as the output valve of cell voltage, then exports.During follow-up operation, when the sample number in FIFO memory
After amount has reached set depth 8, the up-to-date sample value due to collecting every time can be oldest sample value extrusion FIFO storage
Device, at this moment MCU receive cell voltage output order again, then MCU can calculate one to 8 sample values of this in FIFO memory and put down
Average, and calculated mean value is exported as the output valve of cell voltage.
It should be noted that MCU is when often collecting a cell voltage original value, sampling time, Ran Hougen can be recorded
According to the sampling time of cell voltage original value, the cell voltage calibration value sequential storage obtaining after compensating stores to first in first out
In device FIFO buffer.
In addition, referring to Fig. 4 A and Fig. 4 B, electronic equipment has charge and discharge two states in use, from user
Experience angle for, need ensure charged state under cell voltage will not reduce, under discharge condition, cell voltage will not rise.
In the present embodiment, MCU, before exporting the output valve of current cell voltage, can also obtain the electricity of electronic equipment
The charge/discharge state in pond, the concrete mode obtaining charging and discharging state can be come using any one feasible first-selection in prior art
Realize.For example, MCU passes through GPIO (General Purpose Input Output, universal input/output) pin and battery
Charging management chip connects, and is currently at charged state or discharge condition to obtain battery.Wherein, in charge/discharge state
Symbol "/" represent or.
Then, the cell voltage output valve of current cell voltage output valve and last output is compared, judges
Whether meet corresponding cell voltage output condition under charge/discharge state.
Here, under charge/discharge state, corresponding cell voltage output condition is specially：Under charged state, last output
The cell voltage output valve that no more than currently will export of cell voltage output valve；Under discharge condition, the electricity of last output
Cell voltage output valve is not less than the cell voltage output valve that currently will export.
It is then, preserve after the output valve of output current battery level,
Otherwise, replaced using the cell voltage output valve of last output and export after current cell voltage output valve.
For example, if the battery of electronic equipment is currently at charged state, the battery of the last output preserving in MCU
Magnitude of voltage is 70%, and MCU is after receiving cell voltage output order, by calculating the mean value of data in FIFO buffer
The cell voltage output valve obtaining is 80%, then, and the output valve (i.e. 80%) of output current battery level.
If MCU is after receiving cell voltage output order, by calculating averagely being worth to of data in FIFO buffer
Cell voltage output valve be 60%, then, replace current battery electricity using the cell voltage output valve 70% of last output
The cell voltage output valve 70% of the last output of output after pressure output valve 60%.
By the means of the present embodiment it is ensured that the accuracy of the stable and collection result of collection voltages, through testing
Card, the error range between this technical scheme battery voltage acquisition result of the present utility model and cell voltage actual value exists
Within 0.01V, and average power consumption is extremely low, substantially prolongs the use time of whole machine.
Example IV
Fig. 5 is the flow chart of a kind of method of cell voltage of collection electronic equipment of one embodiment of the utility model,
It is provided with micro-control unit and on-off circuit and bleeder circuit, the input of on-off circuit is even in the electronic equipment of the present embodiment
Connect the cell voltage output end of electronic equipment, output end connects the voltage sample end of bleeder circuit, another termination of bleeder circuit
Ground；Two ends parallel connection one storage capacitor of bleeder circuit.
The circuit structure of electronic equipment may refer to the description in previous embodiment two, and the utility model embodiment is to be based on
The control process that circuit described by embodiment two is carried out.
In the present embodiment, the method for the cell voltage of collection electronic equipment comprises the steps：
Step S510, micro-control unit sends the first control signal to connection cell voltage by control signal output pin
The on-off circuit of output end is so that on-off circuit turns on and forms battery voltage sampling loop and to storage capacitor with bleeder circuit
It is charged,
Step S520, after micro-control unit delay predetermined time, receives bleeder circuit by sampled signal input pin and adopts
The cell voltage original value collecting；
Step S530, micro-control unit sends the second control signal to on-off circuit by control signal output pin, makes
Obtain on-off circuit to close；
Step S540, micro-control unit compensates to cell voltage original value and preserves after process.Wherein, step S540 bag
Include：Micro-control unit is deposited according to the sampling time of cell voltage original value, the cell voltage calibration value order obtaining after compensating
Store up in the push-up storage with desired depth.
Embodiment five
Fig. 6 is the flow chart of a kind of method of cell voltage of collection electronic equipment of one embodiment of the utility model,
Referring to Fig. 6, the method gathering the cell voltage of electronic equipment in the present embodiment comprises the steps：
Step S610, exporting high level by MCU GPIO ADC_EN makes metal-oxide-semiconductor turn on,
Here MCU GPIO ADC_EN is the control signal output pin of MCU, and the effect of metal-oxide-semiconductor is on-off circuit, can
To understand that MOS here can be NMOS tube or PMOS, or metal-oxide-semiconductor can also be substituted with triode.
Step S620, time delay 2ms is used for charging to storage capacitor；
Step S630, ADC changes and reads data；
Receive here by GPIO ADC_EN pin is battery voltage analog signal, and MCU receives after analog signal through mould
Number converter ADC carries out analog-to-digital conversion, obtains cell voltage digital quantity.Step S630 reads data and refers to read cell voltage number
Word amount.
Step S640, exporting low level by MCU GPIO ADC_EN makes metal-oxide-semiconductor close；
By closing metal-oxide-semiconductor, it is possible to achieve do not produce power consumption when not needing collection, so that the utility model is this
The average power consumption of technical scheme is extremely low.
Step S650, compensates to the data after ADC conversion；
Specific compensation deals may refer to the associated description of three kinds of previous embodiment, repeats no more here.
Step S660, the data after compensating is put into FIFO buffer process；
Here the data after compensating is cell voltage calibration value, puts into FIFO buffer and carries out process and refers to advanced
First go out existing cell voltage calibration value in memory and carry out calculating process of averaging.
Step S670, does corresponding restriction according to charging and discharging state to the data after processing；
Do corresponding restriction here according to charging and discharging state to the data after processing to refer to：Micro-control unit is current in output
Before the output valve of cell voltage, obtain electronic equipment battery charge/discharge state, by current cell voltage output valve with
The cell voltage output valve of last output is compared, and judges whether to meet corresponding cell voltage under charge/discharge state defeated
Go out condition, be then, preserve after the output valve of output current battery level, otherwise, using the cell voltage output of last output
Value exports after replacing current cell voltage output valve.
S680, exports final magnitude of voltage.
So far, the method for the collection cell voltage of the present embodiment achieves the collection cell voltage of low-power consumption and gathers knot
Fruit and actual value between error minimum it is ensured that collection stability, improve the accuracy of collection result.
In the present embodiment, the depth of push-up storage is 8, and micro-control unit compensates to cell voltage original value
Process and include：Micro-control unit compensates 0.06V to cell voltage original value.
In the present embodiment, on-off circuit includes a NMOS tube, a pull-up resistor, a commutation diode and a bi-directional voltage stabilizing two
Pole pipe, bleeder circuit is a divider resistance；The grid making NMOS tube is control end, receives the first control signal or second and controls letter
Number, it is connected with the cell voltage output end of electronic equipment after drain electrode concatenation pull-up resistor, source electrode connects the electricity of divider resistance respectively
Pressure sampling end and the sampled signal input pin of micro-control unit；Commutation diode is made to be connected to source electrode and the drain electrode of NMOS tube
Between, its positive pole is connected with the source electrode of NMOS tube, and negative pole is connected with the drain electrode of NMOS tube；Bi-directional voltage stabilizing diode is made to be connected to NMOS
Between the grid of pipe and source electrode, one positive pole is connected with the grid of NMOS tube, and another positive pole is connected with the source electrode of NMOS tube.
It should be noted that the method for the cell voltage of collection electronic equipment in the present embodiment is and aforementioned collection electronics
The device of the cell voltage of equipment is corresponding, thus in the present embodiment, the method for the cell voltage of collection electronic equipment is realized
The part that step does not describe may refer to the related description of the utility model previous embodiment, repeats no more here.
In summary, the apparatus and method of the cell voltage of this collection electronic equipment of the present utility model, are only needing
Sending the first control signal by micro-control unit during collection cell voltage makes on-off circuit turn on to on-off circuit, and then completes
The collection of cell voltage；And after the completion of collection, the second control signal closing switch circuit is sent by micro-control unit, thus
When not gathering cell voltage, power consumption will not be produced, compared with prior art directly using the existing acquisition mode of bleeder circuit,
Average power consumption is extremely low, substantially prolongs the standby use time of whole machine.
In addition, the utility model embodiment is after delay predetermined time is to storage capacitor charging, and to gather cell voltage more former
Initial value simultaneously compensates process to cell voltage original value, also ensure that collection and the battery voltage value of output and cell voltage are real
Error between actual value is very little, improves the Stability and veracity of collection result, experiment proves that error range in 0.01V
Within.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection model of the present utility model
Enclose.All any modification, equivalent substitution and improvement made within spirit of the present utility model and principle etc., are all contained in this reality
With in new protection domain.
Claims (5)
1. a kind of device of the cell voltage of collection electronic equipment is it is characterised in that this device includes：Micro-control unit and opening
Close circuit and bleeder circuit,
The input of described on-off circuit connects the cell voltage output end of electronic equipment, and output end connects described bleeder circuit
Voltage sample end, the other end ground connection of described bleeder circuit；Two ends parallel connection one storage capacitor of described bleeder circuit；
The control signal output pin of described micro-control unit is connected with the control end of described on-off circuit, described micro-control unit
Sampled signal input pin connect altogether with the output end of described on-off circuit and the voltage sample end of described bleeder circuit；
Described micro-control unit, for when default sampling time point arrives, sending first to the control end of described on-off circuit
Control signal is so that described on-off circuit turns on and forms battery voltage sampling loop and to described energy storage with described bleeder circuit
Electric capacity is charged, and after delay predetermined time, receives, by sampled signal input pin, the electricity that described bleeder circuit collects
Cell voltage original value, and the second control signal is sent to on-off circuit so that on-off circuit closes by control signal output pin
Close；And, for compensating to this cell voltage original value, the cell voltage calibration value after being compensated preserves.
2. device according to claim 1 is it is characterised in that described micro-control unit, specifically for according to cell voltage
In the original value corresponding sampling time, described cell voltage calibration value order is saved in a first in first out with set depth
In memory；
Described micro-control unit, is additionally operable to when receiving cell voltage output order, to electricity existing in push-up storage
Cell voltage calibration value carries out calculating of averaging, and calculated mean value is exported simultaneously as current cell voltage output valve
Preserve.
3. device according to claim 2, it is characterised in that described micro-control unit, is additionally operable to exporting current electricity
Before cell voltage output valve, obtain electronic equipment battery charge/discharge state, and by current cell voltage output valve with upper
The cell voltage output valve once exporting is compared, and judges whether to meet corresponding cell voltage output under charge/discharge state
Condition, is then, and current cell voltage output valve is exported and preserves, otherwise, using the cell voltage output of last output
Value exports after replacing current cell voltage output valve.
4. the device according to Claims 2 or 3 it is characterised in that described push-up storage depth-set be 8,
Described micro-control unit, specifically for, after 2 milliseconds of time delay, receiving described bleeder circuit by sampled signal input pin
The cell voltage original value collecting, and 0.06V is compensated to cell voltage original value, the cell voltage calibration after being compensated
Value.
5. device according to claim 1 it is characterised in that described on-off circuit include a NMOS tube, a pull-up resistor,
One commutation diode and a two-way Zener diode, described bleeder circuit is a divider resistance；
The grid of described NMOS tube is control end, the cell voltage output end with electronic equipment after the drain electrode described pull-up resistor of concatenation
Connect, source electrode connects the voltage sample end of described divider resistance and the sampled signal input pin of described micro-control unit respectively；
Described commutation diode is connected between the source electrode of described NMOS tube and drain electrode, and its positive pole is connected with the source electrode of described NMOS tube
Connect, negative pole is connected with the drain electrode of described NMOS tube；
Described bi-directional voltage stabilizing diode is connected between grid and the source electrode of described NMOS tube, one positive pole and described NMOS tube
Grid connect, another positive pole is connected with the source electrode of described NMOS tube.
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| CN201620788619.8U CN205958635U (en) | 2016-07-25 | 2016-07-25 | Gather electronic equipment's battery voltage's device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093530A (en) * | 2016-07-25 | 2016-11-09 | 青岛歌尔声学科技有限公司 | A kind of apparatus and method of the cell voltage gathering electronic equipment |
| CN108303651A (en) * | 2017-12-19 | 2018-07-20 | 福建联迪商用设备有限公司 | A kind of measurement method and terminal of battery capacity |
| CN115236534A (en) * | 2022-07-29 | 2022-10-25 | 苏州浪潮智能科技有限公司 | Server RTC battery voltage detection device and detection method |
-
2016
- 2016-07-25 CN CN201620788619.8U patent/CN205958635U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093530A (en) * | 2016-07-25 | 2016-11-09 | 青岛歌尔声学科技有限公司 | A kind of apparatus and method of the cell voltage gathering electronic equipment |
| CN108303651A (en) * | 2017-12-19 | 2018-07-20 | 福建联迪商用设备有限公司 | A kind of measurement method and terminal of battery capacity |
| CN108303651B (en) * | 2017-12-19 | 2020-05-05 | 福建联迪商用设备有限公司 | Battery electric quantity measuring method and terminal |
| CN115236534A (en) * | 2022-07-29 | 2022-10-25 | 苏州浪潮智能科技有限公司 | Server RTC battery voltage detection device and detection method |
| CN115236534B (en) * | 2022-07-29 | 2023-11-14 | 苏州浪潮智能科技有限公司 | Device and method for detecting voltage of RTC battery of server |
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