CN201535815U - Ampere-hour detection circuit of battery - Google Patents
Ampere-hour detection circuit of battery Download PDFInfo
- Publication number
- CN201535815U CN201535815U CN2009203102247U CN200920310224U CN201535815U CN 201535815 U CN201535815 U CN 201535815U CN 2009203102247 U CN2009203102247 U CN 2009203102247U CN 200920310224 U CN200920310224 U CN 200920310224U CN 201535815 U CN201535815 U CN 201535815U
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- circuit
- voltage
- battery
- ampere
- hour
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- Measurement Of Current Or Voltage (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The utility model discloses an ampere-hour detection circuit of battery which comprises a current sampling circuit (1) connected to an electricity-utilization circuit in series, the current sampling circuit (1) connects with a voltage/frequency conversion circuit (2), the voltage/frequency conversion circuit (2) connects with a counting circuit (3), the counting circuit (3) connects with a digital-analog conversion circuit (4), the digital-analog conversion circuit (4) connects with a display circuit (5). The ampere-hour detection circuit of battery has a few of using components, low cost, better detection precision and high reliability, which is particularly suitable for military or civil battery detection apparatus having small volume, light weight and high reliability.
Description
Technical field
The utility model relates to a kind of ampere-hour testing circuit of battery consumption, and particularly a kind of battery ampere-hour testing circuit belongs to battery consumption ampere-hour pick-up unit technical field.
Background technology
The battery ampere-hour detects also makes battery capacity detect, and ampere-hour is the important parameter in the battery use.Can point out the capacity of user's battery,, influence work so that charging does not in time have electricity when preventing to use.The ampere-hour testing circuit generally adopts single-chip microcomputer or the digital control realization of dsp chip both at home and abroad at present, and test function is comprehensive, but volume weight is big, the circuit complexity, and reliability is low.
The utility model content
The purpose of this utility model is to provide that a kind of circuit is simple, reliability is high, take the little battery ampere-hour testing circuit of printed board volume, be used for miniaturized system supplying cells such as extravehicular space suit, dirigible are consumed the detection of ampere-hour, not only can have realized miniaturization but also can guarantee the reliability of system.
The technical solution of the utility model: a kind of battery ampere-hour testing circuit, comprise the current sampling circuit that is connected in the power circuit, current sampling circuit is connected with the voltage/frequency change-over circuit, the voltage/frequency change-over circuit is connected with counting circuit, counting circuit is connected with D/A converting circuit, and D/A converting circuit is connected with display circuit.
In the above-mentioned battery ampere-hour testing circuit, described current sampling circuit is the high-precision hall current sensor.
In the aforesaid battery ampere-hour testing circuit, described voltage/frequency change-over circuit is that model is the voltage/frequency conversion integration block of AD650.
In the aforesaid battery ampere-hour testing circuit, described counting circuit is a slice or the above CMOS serial counter of a slice.
In the aforesaid battery ampere-hour testing circuit, described D/A converting circuit is that model is ten multiplication type d/a converters of cmos current type of AD7533A, and the reference voltage input of D/A converter and model are that the standard of precision voltage circuit of AD584 is connected.
In the aforesaid battery ampere-hour testing circuit, described display circuit is made of voltage table.
Compared with prior art, the utility model uses that components and parts are few, cost is low, accuracy of detection good, reliability is high, is particularly suitable for being applied to want in cube is little, in light weight, reliability the is high military, civilian battery detecting equipment.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Being labeled as in the accompanying drawing: 1-current sampling circuit, 2-voltage/frequency change-over circuit, 3-counting circuit, 4-D/A converting circuit, 5-display circuit.
Embodiment
Below in conjunction with drawings and Examples a kind of battery ampere-hour testing circuit of the present utility model is described in further detail, but not as the foundation of the utility model being done any restriction.
Embodiment of the present utility model: the structured flowchart of battery ampere-hour testing circuit of the present utility model as shown in Figure 1, circuit comprises the current sampling circuit 1 that is connected in the power circuit, current sampling circuit 1 is connected with voltage/frequency change-over circuit 2, voltage/frequency change-over circuit 2 is connected with counting circuit 3, counting circuit 3 is connected with D/A converting circuit 4, and D/A converting circuit 4 is connected with display circuit 5.Current sampling circuit 1 adopts existing high-precision hall current sensor, under the condition that guarantees precision and insulation request, current signal linear is converted to voltage signal.Voltage/frequency change-over circuit 2 is core parts of ampere-hour testing circuit, is responsible for the voltage signal of Hall current sensor output is converted to frequency signal, and its linearity and precision directly have influence on whole ampere-hour accuracy of detection; Consider volume and precision, it is the voltage/frequency conversion integration block of AD650 that present embodiment adopts commercially available model, and this integrated package better linearity degree provides assurance for the all-the-way tracking precision, and makes volume-diminished with less device.Counting circuit 3 adopts traditional CMOS serial counter, adopts CMOS serial counter one to be because it is low in energy consumption, and this seems very important to relying on battery power supply itself; The 2nd, its level and amplifier level match.Because this ampere-hour meter only is used to detect the battery consumption ampere-hour, therefore only need counting forward (addend) to get final product.For satisfying the requirement of counting figure place, available two serial counters series connection is used.Because detecting finally is output signal with voltage, represent the capacity that battery has consumed by the magnitude of voltage that voltage table shows, so need the output digital quantity of counting circuit is converted to analog quantity, D/A converting circuit 4 (D/A converting circuit also can be expressed as the D/A change-over circuit) adopts ten multiplication type d/a converters of cmos current type of model AD7533A, and the reference voltage of D/A converter is provided by the standard of precision voltage circuit of model for AD584.Display circuit 5 is made of voltage table, the capacity that has consumed with voltage value representation battery.
Be example specifically below, specify the principle of work and the running parameter of this circuit with the battery that detects 30Ah, maximum current 15A.
(1) voltage/frequency relation
Electric current 0～15A corresponding voltage 0～5V
Voltage 0～5V respective frequencies 0～15kHz
(2) counting figure place
Adopt two CC4020 ten tetrad serial counters, two CC4020 counters are added up totally 28, adopt low 27, and its counting number is: 2
27=1.342 * 10
8
Gate time to 15kHz is: T=C/I=30/15=2h.Very little as the corresponding 15A of 15kHz, to 30Ah battery: T=C/I=30/15=2h＜2.485h, visible timing is enough, and full scale timing ampere-hour number is: (2
27* 1/1.5 * 10
4) * 15=37.283h
(3) calculating of sampling precision
Owing to adopt 10 D/A conversions, output full scale voltage is 5V, so its sampling precision is: 5V/2
10=4.88mV, the visible samples precision is very high.
Adopt technique scheme, use simple and reliable circuit to realize the high Precision Detection of battery consumption ampere-hour, can realize the miniaturization of testing product simultaneously.
Claims (6)
1. battery ampere-hour testing circuit, it is characterized in that: comprise the current sampling circuit (1) that is connected in the power circuit, current sampling circuit (1) is connected with voltage/frequency change-over circuit (2), voltage/frequency change-over circuit (2) is connected with counting circuit (3), counting circuit (3) is connected with D/A converting circuit (4), and D/A converting circuit (4) is connected with display circuit (5).
2. battery ampere-hour testing circuit according to claim 1 is characterized in that: described current sampling circuit (1) is the high-precision hall current sensor.
3. battery ampere-hour testing circuit according to claim 2 is characterized in that: described voltage/frequency change-over circuit (2) is the voltage/frequency conversion integration block of AD650 for model.
4. battery ampere-hour testing circuit according to claim 3 is characterized in that: described counting circuit (3) is a slice or the above CMOS serial counter of a slice.
5. battery ampere-hour testing circuit according to claim 4, it is characterized in that: described D/A converting circuit (4) is ten multiplication type d/a converters of cmos current type of AD7533A for model, and the reference voltage input of D/A converter and model are that the standard of precision voltage circuit of AD584 is connected.
6. battery ampere-hour testing circuit according to claim 5 is characterized in that: described display circuit (5) is made of voltage table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203102247U CN201535815U (en) | 2009-09-14 | 2009-09-14 | Ampere-hour detection circuit of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203102247U CN201535815U (en) | 2009-09-14 | 2009-09-14 | Ampere-hour detection circuit of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201535815U true CN201535815U (en) | 2010-07-28 |
Family
ID=42535593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203102247U Expired - Fee Related CN201535815U (en) | 2009-09-14 | 2009-09-14 | Ampere-hour detection circuit of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201535815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981123A (en) * | 2012-11-05 | 2013-03-20 | 浙江吉利汽车研究院有限公司杭州分公司 | Estimation system and estimation method of power battery surplus capacity |
-
2009
- 2009-09-14 CN CN2009203102247U patent/CN201535815U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981123A (en) * | 2012-11-05 | 2013-03-20 | 浙江吉利汽车研究院有限公司杭州分公司 | Estimation system and estimation method of power battery surplus capacity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100728 Termination date: 20180914 |