CN103207317B - Voltage change collecting circuit of voltmeter applied to battery - Google Patents
Voltage change collecting circuit of voltmeter applied to battery Download PDFInfo
- Publication number
- CN103207317B CN103207317B CN201310097444.7A CN201310097444A CN103207317B CN 103207317 B CN103207317 B CN 103207317B CN 201310097444 A CN201310097444 A CN 201310097444A CN 103207317 B CN103207317 B CN 103207317B
- Authority
- CN
- China
- Prior art keywords
- voltage
- change
- decrease
- increase
- comparer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a voltage change collecting circuit of a voltmeter applied to a battery. The voltage change collecting circuit of the voltmeter applied to the battery utilizes a comparator to monitor the changes of battery voltages and changes the mode of timed collecting into a mode that the time of the changes and change directions are recorded when the voltages change and the working is automatically stopped when the voltages do not change for a long time, so that power consumption, occupancy of system resources and circuit hardware costs are further reduced. The voltage change collecting circuit of the voltmeter applied in the battery comprises a voltage increase and decrease change comparator module, a clock and timing module and an overtime timing module, wherein the voltage increase and decrease change comparator module is respectively connected with the clock and timing module and the overtime timing module, and the clock and timing module and the overtime timing module are interconnected.
Description
Technical field
The present invention relates to battery applications voltameter technical field, particularly relate to a kind of change in voltage Acquisition Circuit of battery applications voltameter.
Background technology
Voltameter is divided into the battery meter volume and electricity meter and application oriented battery applications voltameter that measure for battery according to application purpose.Namely start aging gradually after cell activation, the life-span of battery is only the expression declined to capacity, not directly perceived on the impact of an embody rule.Battery applications voltameter, from the user perspective of battery power supply system, is reflected in the battery condition in application system.
Voltage measurement is the basic circuit of voltameter.Existing voltameter generally adopts the analog to digital converter that is embedded in special chip or adopts independently analog to digital converter to carry out voltage monitoring on a small quantity.These special chips comprise voltameter special chip as MAX17040, DS2786, BQ27530 etc., power management chip is as TPS65950 etc., these electric voltage observation circuits are not all special in battery applications voltameter optimal design, its tension measuring circuit generally adopts common voltage measurement mode number converter in conjunction with timing function, based on timing voltage survey record, the contradiction of power consumption and pendulous frequency not easily solves, the too low Rapid Variable Design easily missing cell voltage of pendulous frequency, too high, consume too much energy and take the more processing time.Especially after system task completes for record battery stress relief process also need special prolongation mode of operation just can complete, consumed power and occupying system resources larger.For lithium battery, its operating voltage range is no more than 15% of its charging voltage, if the analog to digital converter adopting transformation range to count from 0, then have the transformation range of 85% less than utilization, design cost and engineering cost are wasted.
Summary of the invention
The object of this invention is to provide a kind of change in voltage Acquisition Circuit of battery applications voltameter, comparer is utilized to monitor the change of cell voltage, the time and the change direction that the timing acquiring of voltage are made into record change generation when voltage changes, voltage long-time constant time automatically quit work, reduce power consumption further, system resource take and circuit hardware cost.
Technical scheme of the present invention is:
A kind of change in voltage Acquisition Circuit of battery applications voltameter, it is characterized in that, comprise voltage increase and decrease comparator module, clock and timing module and overtime timing module, described voltage increase and decrease comparator module connects clock and timing module and overtime timing module respectively, and clock and timing module and overtime timing module are interconnected; Described voltage increase and decrease comparator module is for monitoring the change of cell voltage, and when within the scope of the center voltage that cell voltage remains on setting, described voltage increase and decrease comparator module does not export; When cell voltage change exceeds described center voltage scope, the time that described voltage increase and decrease comparator module recording voltage change occurs and change direction, and the sampling adjusting cell voltage is moved to center voltage direction; Described clock and timing module are the clock of recording voltage change time of origin and the timer of recording clock upset number of times; Described overtime timing module is used for restarting timing when each change in voltage, no longer changes, then stop the work of each module of described change in voltage Acquisition Circuit if exceed certain hour voltage, keeps the data recorded.
Described voltage increase and decrease comparator module comprises weight sampling bleeder circuit, comparer is overflowed in increase and decrease, increase and decrease code translator, cyclic store, read and logic glue and voltage reference source, described weight sampling bleeder circuit connects increase and decrease code translator, output by increase and decrease code translator controls, the sampled voltage interface Vs of weight sampling bleeder circuit, the biased reference voltage interface Vref0 moving reference voltage interface Vrefc and be connected with voltage reference source connects the input end increasing and decreasing and overflow comparer respectively, the overflow flag output terminal that comparer is overflowed in increase and decrease is connected cyclic store respectively with increase and decrease mark output terminal, cyclic store connects reading and logic glue, and the overflow flag output terminal that comparer is overflowed in increase and decrease also connects reading and logic glue, the increase and decrease mark output terminal that comparer is overflowed in increase and decrease also connects increase and decrease code translator, read and be also connected increase and decrease code translator by increase and decrease pulse output end with logic glue, cyclic store connects clock and timing module, reads and is connected overtime timing module with logic glue by counting clear command end.
Described weight sampling bleeder circuit comprises the T-shaped resistance pressure-dividing network of R-2R binary weighting, the T-shaped resistance pressure-dividing network of described R-2R binary weighting comprises n+1 position change-over switch d(0), d(1), d(n), and R-2R Weighted T type resistor network, minimum weights position change-over switch d(0 in R-2R resistor network) and time minimum weights position change-over switch d(1) between " R " resistance be two resistances of series connection be the resistance of 0.5R, with minimum weights position change-over switch d(0) other end resistance in parallel with between reference voltage interface Vref0 of " 2R " resistance that be connected be the resistance of 2R, with maximum weights position change-over switch d(n) other end resistance in parallel with between sampled voltage interface Vs of " 2R " resistance that be connected be the resistance of mR, two of institute's rheme change-over switch not moved end connect sampled voltage interface Vs and reference voltage interface Vref0 respectively, the moved end of institute's rheme change-over switch is thrown and is represented d (i)=0 to during reference voltage interface Vref0, and the moved end of institute's rheme change-over switch is thrown and represented d (i)=1 to during sampled voltage interface Vs, biased move reference voltage interface Vrefc from series connection two resistances be 0.5R resistance between extract out.
The T-shaped resistance pressure-dividing network of described R-2R binary weighting connects mesuring battary by active low pass circuit, described active low pass circuit comprises sampling resistor p1R and p2R of two series connection, the input end of a polarity-inverting amplifier is connected between described sampling resistor p1R and p2R, has Miller effect electric capacity between the input end of polarity-inverting amplifier and output terminal.
Described increase and decrease is overflowed comparer and is comprised a first comparer C1 and second comparer C2 and OR circuit A, the inverting input of described first comparer C1 connects the reference voltage interface Vref0 of weight sampling bleeder circuit, the in-phase input end of described second comparer C2 connects the biased of weight sampling bleeder circuit and moves reference voltage interface Vrefc, and the sampled voltage interface Vs of weight sampling bleeder circuit is connected with the in-phase input end of the first comparer C1 and the inverting input of the second comparer C2 simultaneously; The output terminal of described first comparer C1 is increase and decrease mark output terminal, and the output terminal of the output terminal of the first comparer C1 and the second comparer C2 is the input end of OR circuit, and the output terminal of OR circuit is overflow flag output terminal.
Described clock and timing module and overtime timing module are same timer, are timing oscillator divider and time out timer.
Technique effect of the present invention:
The change in voltage Acquisition Circuit of a kind of battery applications voltameter provided by the invention, comparer is utilized to monitor the change of cell voltage, the time and the change direction that the timing acquiring of voltage are made into record change generation when voltage changes, what make the power consumption of voltameter and cell voltage is changing into direct ratio, the needs namely calculated to electricity are directly proportional, also comprise when cell voltage long-time constant time automatically to quit work and by voltage measurement range window, namely a little window ranges is corresponded to, reduce further the power consumption of battery applications voltameter, system resource takies and cost of development and engineering cost.
Change in voltage Acquisition Circuit of the present invention comprises three functional modules, voltage increase and decrease comparator module, clock and timing module and overtime timing module; Voltage increase and decrease comparator module is the voltage comparator of monitoring cell voltage change, set up a center voltage scope, only when cell voltage change exceedes described center voltage scope, the time that recording voltage change occurs and change direction, and the sampling adjusting cell voltage is moved to center voltage scope direction, exceed to detect change in voltage timing detection and the record that setting range record transformation period and direction instead of voltage; Although clock and timing module and overtime timing module are same timer in actual design, but there is different functional purposes, time utilizing same timer record change in voltage to occur and when within the scope of the center voltage that cell voltage remains on setting for a long time, then automatically stop the work of each module of described change in voltage Acquisition Circuit, keep the data recorded.These improve targetedly, greatly reduce taking of power consumption and system resource, provide cost savings.
Accompanying drawing explanation
Fig. 1 is change in voltage Acquisition Circuit high-level schematic functional block diagram of the present invention.
Fig. 2 is the electrical block diagram of change in voltage Acquisition Circuit embodiment of the present invention.
Fig. 3 is the electrical block diagram of the weight sampling bleeder circuit embodiment in Fig. 2.
Fig. 4 is the electrical block diagram of the increase and decrease spilling comparer in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
As shown in Figure 1, a kind of change in voltage Acquisition Circuit of battery applications voltameter, comprise three functional modules, be respectively voltage increase and decrease comparator module, clock and timing module and overtime timing module, voltage increase and decrease comparator module connects clock and timing module and overtime timing module respectively, and clock and timing module and overtime timing module are interconnected; Voltage increase and decrease comparator module is for monitoring the change of cell voltage, and when within the scope of the center voltage that cell voltage remains on setting, described voltage increase and decrease comparator module does not export; When cell voltage change exceeds described center voltage scope, the time that described voltage increase and decrease comparator module recording voltage change occurs and change direction, and the sampling adjusting cell voltage is moved to center voltage direction; Clock and timing module are the clock of recording voltage change time of origin and the timer of recording clock upset number of times; Time-out timing module is used for restarting timing when each change in voltage, no longer changes, then stop the work of each module of described change in voltage Acquisition Circuit if exceed certain hour voltage, keeps the data recorded.Clock and timing module and overtime timing module are only different functional purposes, can be same timer when actual design realizes.
Shown in Fig. 1 three functional module may have different specific implementations, and Fig. 2 is then one of circuit function block diagram realizing this technical scheme.As shown in Figure 2, be the electrical block diagram of change in voltage Acquisition Circuit embodiment of the present invention.Each circuit function frame in Fig. 2 all likely adopts different concrete logical designs and circuit design to be achieved, such as adopt different integrated circuit technologies, as CMOS or bipolar technology, or adopt different logical expressions, as twin voltage logic, or set center voltage scope in different ways, carry out the adjustment of voltage and compare, as weighted current source or memristor etc., output interface also can be any general or special purpose interface mode or circuit.
As shown in Figure 2, voltage increase and decrease comparator module comprises weight sampling bleeder circuit, comparer is overflowed in increase and decrease, increase and decrease code translator, cyclic store, read and logic glue and voltage reference source, weight sampling bleeder circuit connects increase and decrease code translator, output by increase and decrease code translator controls, the sampled voltage interface Vs of weight sampling bleeder circuit, the biased reference voltage interface Vref0 moving reference voltage interface Vrefc and be connected with voltage reference source connects the input end increasing and decreasing and overflow comparer respectively, the overflow flag output terminal OF that comparer is overflowed in increase and decrease is connected cyclic store respectively with increase and decrease mark output terminal INC, cyclic store connects reading and logic glue, and the overflow flag output terminal OF that comparer is overflowed in increase and decrease also connects reading and logic glue, the increase and decrease mark output terminal INC that comparer is overflowed in increase and decrease also connects increase and decrease code translator, read and be also connected increase and decrease code translator by increase and decrease pulse output end ACT with logic glue, cyclic store connects clock and timing module, read and be connected overtime timing module with logic glue by counting clear command port, in the present embodiment, adopt a timing oscillator divider and time out timer to connect the counting clear command end CLR of cyclic store and reading and logic glue simultaneously.Wherein, the state of weight sampling bleeder circuit controls by the output increasing and decreasing code translator, and this increase and decrease code translator determines sampled voltage to move to center voltage according to the increase and decrease mark received when receiving increase and decrease pulse, increases or a minimizing voltage unit; Increase and decrease pulse is after increase and decrease spilling comparer detects that cell voltage departs from center voltage certain limit, is sent according to busy-idle condition decision at that time by reading and logic glue; Do the variable effect data that can prevent from increasing and decreasing code translator so accurately to read.When increase and decrease spilling comparer detects that cell voltage departs from and exports overflow flag, the chronometric data of timing oscillator divider and increase and decrease are marked stored in cyclic store, and the appearance of overflow flag simultaneously also makes reading and logic glue export and removes overtime dormancy clocked command.Appearance except overflow flag is removed except overtime dormancy timing, reads this circuit also remove dormancy timing through output interface IF.Record is carried out, for a long time unchanged and out-of-work technical scheme automatic when not reading when namely the cooperation of foregoing circuit completes change in voltage.Through output interface IF, external system can read current sampled voltage amount of movement, current time and whether recover from dormancy, the direction of all previous change in voltage and time of origin in cyclic store.
As shown in Figure 3, be the electrical block diagram of the weight sampling bleeder circuit embodiment in Fig. 2.Comprise a T-shaped resistance pressure-dividing network of R-2R binary weighting and an active low pass circuit.Wherein active low pass circuit comprises sampling resistor p1R and p2R of two series connection, the input end of a polarity-inverting amplifier is connected between sampling resistor p1R and p2R, have Miller effect electric capacity between the input end of polarity-inverting amplifier and output terminal, its effect is the longer time constant utilizing negative feedback Miller effect and less electric capacity to realize measuring cell voltage needs on the integrated.
The T-shaped resistance pressure-dividing network of R-2R binary weighting comprises n+1 position change-over switch d(0), d(1), d(n), and R-2R Weighted T type resistor network, minimum weights position change-over switch d(0 in R-2R resistor network) and time minimum weights position change-over switch d(1) between " R " resistance be two resistances of series connection be the resistance of 0.5R, with minimum weights position change-over switch d(0) other end resistance in parallel with between reference voltage interface Vref0 of " 2R " resistance that be connected be the resistance of 2R, with maximum weights position change-over switch d(n) other end resistance in parallel with between sampled voltage interface Vs of " 2R " resistance that be connected be the resistance of mR, two of change-over switch, position not moved end connects sampled voltage interface Vs and reference voltage interface Vref0 respectively, the moved end of position change-over switch is thrown and is represented d (i)=0 to during reference voltage interface Vref0, and the moved end of position change-over switch is thrown and represented d (i)=1 to during sampled voltage interface Vs, biased move reference voltage interface Vrefc from series connection two resistances be 0.5R resistance between extract out, 1.5 times of minimum change units are offset downward than Vref0, move reference voltage (also referred to as position reference voltage) as biased, the common reference voltage end Vref1 of T-shaped resistor network is another reference voltage interface be connected with voltage reference source.
This network utilisation (n+1) individual position change-over switch produces (2
n+1-1) individual point of pressure condition, makes (Vb-Vref0) correspond to the dividing potential drop determined by this (n+1) individual switch in the scope of (Vref1-Vref0) with the scaled mirror of (p1+p2).To express in Fig. 3 i-th switch with d (i)=1 and throw sampled voltage interface Vs to the right, otherwise d (i)=0 to be expressed in Fig. 3 i-th switch and is thrown reference voltage interface Vref0 to the left, and the cell voltage Vb of Vs=Vref0 is equaled:
Vref0+(p1+p2)·(Vref0-Vref1)·(1/m+(d(0)·2
0+d(1)·2
1+…+d(n)·2
n)/2
n+1) (1)
The proportionate relationship only remaining all resistance values in this formula (1) can be seen, be conducive to adopting integrated circuit technology to make.
The minimum change unit of this potential-divider network regulation voltage and resolution are:
(p1+p2)·(Vref0-Vref1)/2
n+1(2)
When the corresponding all switches of the Vb minimum value of Vs=Vref0 can be kept to throw to the left, this Vb value is denoted as Vb0, that is:
Vb0=Vref0+(p1+p2)·(Vref0-Vref1)/m (3)
The corresponding all switches of maximal value of Vb are thrown to the right, and this Vb value is denoted as Vb1, that is:
Vb1=Vb0+(p1+p2)·(Vref0-Vref1)·(1/m+1-1/2
n+1) (4)
The dynamic range of the cell voltage that namely scope between maximal value and minimum value can be measured is:
(p1+p2)·(Vref0-Vref1)·(1-1/2
n+1) (5)
Parameter p 1, p2, Vref0, Vref1 and m be used for matching battery voltage effective range and facilitate integrated circuit technology to make to optimize; Such as Vref0 can adopt the sufficient 2.5V benchmark of engineering experience, and Vref1 copies Vref0 by a certain percentage, and p1, p2 determine oversampling ratio, and m is used for generation shift value, revises whole correspondence from d (i) |
i=0 ~ n=0 to d (i)
i=0 ~ nthe measurement range of=1.
The resistance of the foot of the T-shaped R-2R resistor network in Fig. 3 is 2R, and the resistance between any two foots is R.This T-shaped network leftmost side, namely be connected with minimum weights switch d (0), resistance be the foot left side of 2R another one resistance in parallel is the resistance of 2R, this makes when all foots are all connected to a common point, the node T-shaped from any one is looked left, resistance between this node and above-mentioned common point is all 2R, namely the same with the resistance of sufficient branch.If there is electric current to flow into from the branch on right side, flow back to from above-mentioned common point, then often through such node, have half electric current to flow into sufficient branch, half flows to left-hand branch; If the electric current flowing into the sufficient branch of the leftmost side is 1 unit, then every position to the right, the electric current flowing into sufficient branch doubles.The electric current of 0 to n Ge Zu branch is (d (0) 2 respectively
0, d (1) 2
1..., d (i) 2
i..., d (n+1) 2
n+1).If in Fig. 3 the voltage of Vs and the voltage of Vref0 consistent, then no matter figure breaker in middle is which side is received, and the electric current of sufficient branch is constant, and the state of switch only determines that electric current flows through Vref0 or flows through Vs; Comparer C1 and C2 be connected with Vs is input as high resistant, the voltage of Vs node only depend on from cell voltage Vb direction through p1R and p2R sampling resistor and through above-mentioned resistor network until the path of Vref1 can obtain how many electric currents.During owing to exceeding the scope of 1.5 least unit determined by Vref0 and Vrefc when the voltage of Vs, increase and decrease code translator can increase through several times or reduce, and finally make Vs voltage again be pulled back to above-mentioned scope.First suppose that Vs equals Vref0, then Vb equals through the electric current that p1R and p2R flows to Vs Vs to flow to Vref1 electric current through resistor network, utilizes this relation about to fall public resistance value R and namely obtains formula (1).When in the scope of Vs between Vref0 and Vrefc, because Vs does not strictly equal Vref0, the slight change of electric current can be caused during switch connection Vref0 and connection Vs, but this scope is 1.5 least unit relative to the difference between Vref0 and Vref1, therefore, when Vs is within the scope of this, Vb can think that the voltage determined at formula (1) is toward in the scope of low 1.5 times.The electric current of the sufficient branch switch of the leftmost side is the minimum current change that can differentiate, and this minimum current is determined by the number of times of resistance value, shunting and the difference relationship of Vref0 and Vref1; Correspond to the sampling of Vb, that about falls common resistance R arrives formula (2), and the minimum voltage that can differentiate changes.
As shown in Figure 4, for the electrical block diagram of comparer is overflowed in the increase and decrease in Fig. 2.Increase and decrease is overflowed comparer and is comprised a first comparer C1 and second comparer C2 and OR circuit A, the inverting input of the first comparer C1 connects the reference voltage interface Vref0 of weight sampling bleeder circuit, the in-phase input end of the second comparer C2 connects the biased of weight sampling bleeder circuit and moves reference voltage interface Vrefc, and the sampled voltage interface Vs of weight sampling bleeder circuit is connected with the in-phase input end of the first comparer C1 and the inverting input of the second comparer C2 simultaneously; The output terminal of the first comparer C1 is increase and decrease mark output terminal, and the output terminal of the output terminal of the first comparer C1 and the second comparer C2 is the input end of OR circuit, and the output terminal of OR circuit is overflow flag output terminal.The minimum change unit of the difference between Vref0 and Vrefc and aforesaid 1.5 times; Sampled voltage Vs and the Vref0 obtained after weighting resistor potential-divider network dividing potential drop and Vrefc compares, and exports overflow flag OF and represent the increase and decrease mark INC exceeding direction when Vs exceeds any one reference voltage; After each generation increase and decrease is overflowed, the record spilling time also moves a unit according to spilling steering handle sampled voltage Vs to center voltage point.The repeating of this process makes Vs remain within Vref0 and the Vrefc center voltage point range of setting always.
Claims (5)
1. the change in voltage Acquisition Circuit of a battery applications voltameter, it is characterized in that, comprise voltage increase and decrease comparator module, clock and timing module and overtime timing module, described voltage increase and decrease comparator module connects clock and timing module and overtime timing module respectively, and clock and timing module and overtime timing module are interconnected; Described voltage increase and decrease comparator module is for monitoring the change of cell voltage, and when within the scope of the center voltage that cell voltage remains on setting, described voltage increase and decrease comparator module does not export; When cell voltage change exceeds described center voltage scope, the time that described voltage increase and decrease comparator module recording voltage change occurs and change direction, and the sampling adjusting cell voltage is moved to center voltage direction; Described clock and timing module are the clock of recording voltage change time of origin and the timer of recording clock upset number of times; Described overtime timing module is used for restarting timing when each change in voltage, no longer changes, then stop the work of each module of described change in voltage Acquisition Circuit if exceed certain hour voltage, keeps the data recorded;
Described voltage increase and decrease comparator module comprises weight sampling bleeder circuit, comparer is overflowed in increase and decrease, increase and decrease code translator, cyclic store, read and logic glue and voltage reference source, described weight sampling bleeder circuit connects increase and decrease code translator, output by increase and decrease code translator controls, the sampled voltage interface Vs of weight sampling bleeder circuit, the biased reference voltage interface Vref0 moving reference voltage interface Vrefc and be connected with voltage reference source connects the input end increasing and decreasing and overflow comparer respectively, the overflow flag output terminal that comparer is overflowed in increase and decrease is connected cyclic store respectively with increase and decrease mark output terminal, cyclic store connects reading and logic glue, and the overflow flag output terminal that comparer is overflowed in increase and decrease also connects reading and logic glue, the increase and decrease mark output terminal that comparer is overflowed in increase and decrease also connects increase and decrease code translator, read and be also connected increase and decrease code translator by increase and decrease pulse output end with logic glue, cyclic store connects clock and timing module, reads and is connected overtime timing module with logic glue by counting clear command end.
2. the change in voltage Acquisition Circuit of battery applications voltameter according to claim 1, it is characterized in that, described weight sampling bleeder circuit comprises the T-shaped resistance pressure-dividing network of R-2R binary weighting, the T-shaped resistance pressure-dividing network of described R-2R binary weighting comprises n+1 position change-over switch d (0), d (1), d (n), and R-2R Weighted T type resistor network, minimum weights position change-over switch d (0) in R-2R resistor network and " R " resistance between time minimum weights position change-over switch d (1) are two resistances of series connection is the resistance of 0.5R, be the resistance of 2R with the other end of " 2R " resistance that minimum weights position change-over switch d (0) an is connected resistance in parallel with between reference voltage interface Vref0, an other end resistance in parallel with between sampled voltage interface Vs of " 2R " resistance be connected with maximum weights position change-over switch d (n) is the resistance of mR, two of institute's rheme change-over switch not moved end connect sampled voltage interface Vs and reference voltage interface Vref0 respectively, the moved end of institute's rheme change-over switch is thrown and is represented d (i)=0 to during reference voltage interface Vref0, and the moved end of institute's rheme change-over switch is thrown and represented d (i)=1 to during sampled voltage interface Vs, biased move reference voltage interface Vrefc from series connection two resistances be 0.5R resistance between extract out.
3. the change in voltage Acquisition Circuit of battery applications voltameter according to claim 2, it is characterized in that, the T-shaped resistance pressure-dividing network of described R-2R binary weighting connects mesuring battary by active low pass circuit, described active low pass circuit comprises sampling resistor p1R and p2R of two series connection, the input end of a polarity-inverting amplifier is connected between described sampling resistor p1R and p2R, has Miller effect electric capacity between the input end of polarity-inverting amplifier and output terminal.
4. the change in voltage Acquisition Circuit of battery applications voltameter according to claim 1, it is characterized in that, described increase and decrease is overflowed comparer and is comprised a first comparer C1 and second comparer C2 and OR circuit A, the inverting input of described first comparer C1 connects the reference voltage interface Vref0 of weight sampling bleeder circuit, the in-phase input end of described second comparer C2 connects the biased of weight sampling bleeder circuit and moves reference voltage interface Vrefc, the sampled voltage interface Vs of weight sampling bleeder circuit is connected with the in-phase input end of the first comparer C1 and the inverting input of the second comparer C2 simultaneously, the output terminal of described first comparer C1 is increase and decrease mark output terminal, and the output terminal of the output terminal of the first comparer C1 and the second comparer C2 is the input end of OR circuit, and the output terminal of OR circuit is overflow flag output terminal.
5. according to the change in voltage Acquisition Circuit of the battery applications voltameter one of Claims 1-4 Suo Shu, it is characterized in that, described clock and timing module and overtime timing module are same timer, are timing oscillator divider and time out timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097444.7A CN103207317B (en) | 2013-03-25 | 2013-03-25 | Voltage change collecting circuit of voltmeter applied to battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097444.7A CN103207317B (en) | 2013-03-25 | 2013-03-25 | Voltage change collecting circuit of voltmeter applied to battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103207317A CN103207317A (en) | 2013-07-17 |
| CN103207317B true CN103207317B (en) | 2015-04-15 |
Family
ID=48754600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310097444.7A Active CN103207317B (en) | 2013-03-25 | 2013-03-25 | Voltage change collecting circuit of voltmeter applied to battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103207317B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242522B (en) * | 2015-10-27 | 2017-09-29 | 上海航天精密机械研究所 | The test device and method of testing of separating mechanism disengaging time |
| CN109061293A (en) * | 2018-09-28 | 2018-12-21 | 钜泉光电科技(上海)股份有限公司 | A kind of detection circuit and electric energy computation chip of tension measuring circuit parameter |
| WO2020155068A1 (en) * | 2019-01-31 | 2020-08-06 | 华为技术有限公司 | Current measuring device, method, and apparatus |
| CN111325964B (en) * | 2020-03-11 | 2021-08-13 | 江阴长仪集团有限公司 | Wireless module for intelligent electric energy meter and automatic code pairing method |
| CN112345823A (en) * | 2020-10-20 | 2021-02-09 | 深圳市新国都支付技术有限公司 | Power consumption testing method, device and system and storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000231940A (en) * | 1999-02-10 | 2000-08-22 | Marunitto:Kk | Battery meter |
| US7531989B2 (en) * | 2005-11-02 | 2009-05-12 | 02Micro International Ltd. | Battery fuel gauge circuit |
| ES2296559B1 (en) * | 2007-09-13 | 2010-11-02 | Pretensados Zaragoza, S.L. | BATTERY OF ENERGY DIVISION COUNTERS. |
-
2013
- 2013-03-25 CN CN201310097444.7A patent/CN103207317B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103207317A (en) | 2013-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103207317B (en) | Voltage change collecting circuit of voltmeter applied to battery | |
| US7750612B2 (en) | Voltage-pulse converting circuit and charge control system | |
| CN105379120A (en) | Capacitive proximity detection using delta-sigma conversion | |
| CN103091562A (en) | Capacitance capacity measurement circuit | |
| CN109696637B (en) | Method for monitoring capacity of lithium disposable battery | |
| CN103472400B (en) | A kind of acquisition methods of battery capacity of mobile terminal and system | |
| CN201303252Y (en) | Intelligent battery management solar charge controller | |
| CN103378636A (en) | Mobile power source control chip and mobile power source with same | |
| CN105974317A (en) | Remaining battery life prediction device and battery pack | |
| CN102981041A (en) | Battery cell monitoring system | |
| US6661204B2 (en) | Battery charge monitor | |
| CN201173947Y (en) | Battery voltage detection circuit | |
| CN109802152B (en) | Application of circuit structure for monitoring capacity of lithium disposable battery | |
| CN105044603A (en) | Low-power low-cost lithium battery voltage detection circuit and method | |
| CN201163288Y (en) | Power supply voltage detecting circuit | |
| CN208140793U (en) | A kind of super low-power consumption battery voltage sampling circuit | |
| CN106443156B (en) | Electric automobile current measurement circuit | |
| JP5480434B1 (en) | Capacitor power supply device, voltage monitoring device, voltage monitoring method, and method of manufacturing capacitor power supply device | |
| CN102841246B (en) | High-precision voltage measuring circuit | |
| CN101754539B (en) | Sampling circuit, LED drive circuit and method for detecting electric quantity of battery | |
| CN204947662U (en) | A kind of charging circuit | |
| CN202383264U (en) | Battery voltage detection circuit and device | |
| CN207994712U (en) | A kind of wireless sensor low-light volt charge control and data collector | |
| US20100138176A1 (en) | System for accurate battery run time estimation utilizing voltage capture and coulomb counting | |
| CN202939219U (en) | Multichannel intelligent electric quantity module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |