CN204142928U - A kind of battery electric quantity measuring instrument - Google Patents
A kind of battery electric quantity measuring instrument Download PDFInfo
- Publication number
- CN204142928U CN204142928U CN201420203962.2U CN201420203962U CN204142928U CN 204142928 U CN204142928 U CN 204142928U CN 201420203962 U CN201420203962 U CN 201420203962U CN 204142928 U CN204142928 U CN 204142928U
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- China
- Prior art keywords
- voltage
- resistance
- electric quantity
- power supply
- measuring instrument
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of battery electric quantity measuring instrument, primarily of power supply circuit, display circuit, metering circuit composition, display circuit comprises again current-limiting resistance and three LED; Metering circuit comprises voltage comparator, four divider resistances be connected in series; Power supply circuit comprises AC interface, ac-dc converter circuit.The utility model battery electric quantity measuring instrument shows the voltage of mesuring battary by the number that LED is lit, intuitively can show the dump energy of battery, thus facilitates user store classifiedly battery and use.
Description
Technical field
The utility model relates to a kind of surveying instrument, is exactly specifically a kind of instrument measuring battery electric quantity.
Background technology
At present, the electronic product that family is a lot of all needs to use dry cell, such as telepilot, radio etc.But we often can put together mixing with the used batteries crossed and unused new battery, are not easy to distinguish.Therefore we often can put them use together; but because the internal resistance of new used batteries is different, its discharge performance is different, can cause a part of power consumption of new battery on used batteries when using together; and used batteries can loss obtain more severe, greatly shorten the serviceable life of battery.Therefore need a kind of battery electric quantity measuring instrument to differentiate new used batteries.
Utility model content
The utility model object is to provide a kind of instrument, and this instrument is used for measuring the remaining electricity of battery, thus differentiates new used batteries.
The technical solution of the utility model is:
A kind of battery electric quantity measuring instrument, it is primarily of display circuit, metering circuit, and power supply circuit forms.It is characterized in that, comprise a power supply circuit, the forward output terminal of described power supply circuit passes through one successively by anode resistance, first divider resistance, the resistance that second divider resistance and ground end resistance are connected to form is series-connected to the ground end of power supply circuit, first divider resistance, second divider resistance and ground end resistance three resistance near the forward output terminal direction of power supply circuit one end respectively with the first voltage comparator, second voltage comparator is connected with the inverting input of tertiary voltage comparer, the in-phase input end of described three voltage comparators is all connected to mesuring battary voltage positive input, described first voltage comparator, the output terminal of the second voltage comparator and tertiary voltage comparer is connected respectively to the first indication LED, after second indication LED and the 3rd indication LED, the ground end of power supply circuit is connected to again respectively by a current-limiting resistance.
Described a kind of battery electric quantity measuring instrument, it is characterized in that the AC interface of described power supply circuit is a pair rotatable metallic plug, plug is all placed in of the battery electric quantity measurement instrument back side rises as high as the banks when not using, during use, plug is outwards rotated 90 degree, the sheet metal stretched out can insert common AC220V socket.
Principle of work of the present utility model is:
A kind of battery electric quantity measuring instrument, it is primarily of display circuit, metering circuit, and power supply circuit forms.Power supply circuit comprises again AC interface and AC/DC change-over circuit, AC interface is a pair rotatable metallic plug, it is that battery electric quantity measuring instrument is powered that the sheet metal stretched out can insert common AC220V socket, and AC/DC change-over circuit is used for converting alternating-current voltage source to DC voltage.Metering circuit comprises four divider resistances be in series and three voltage comparators, three the different voltage values of divider resistance for obtaining certain numerical value size, described three different voltage values are input to the inverting input of three voltage comparators respectively, and the in-phase input end of described three voltage comparators is all connected on tested cell voltage.By different from three for tested cell voltage voltage value being compared, thus measure the voltage range at tested cell voltage size place.Display circuit comprises three current-limiting resistances and LED, and when tested cell voltage is less than minimum voltage partial pressure value, three LED all do not work; When tested cell voltage is greater than minimum voltage partial pressure value and is less than the second small voltage partial pressure value, a LED is lit; When tested cell voltage is greater than the second small voltage partial pressure value and is less than maximum voltage partial pressure value, two LED are lit; When tested cell voltage is greater than maximum voltage partial pressure value, three LED are lit.Therefore, achieve the voltage range showing tested battery by the number that LED is lit, thus the dump energy of the tested battery of display directly perceived.
When using the utility model, mesuring battary is put into the battery compartment of surveying instrument, then the metallic plug of AC interface is rotated 90 degree, the sheet metal stretched out inserts common AC220V socket, judges by observing LED the electricity that battery is remaining.
Advantage of the present utility model (beneficial effect) is:
1. the utility model battery electric quantity measuring instrument shows battery electric quantity situation by the number that LED is lit, simple, intuitive.
2. the utility model battery electric quantity measuring instrument can be worked by ac power supply method, and power taking is convenient, practical.
3. the utility model battery electric quantity measuring instrument internal circuit is simple, and cost is lower.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the utility model circuit structure schematic diagram;
Fig. 2 is utility model front schematic view;
Fig. 3 is utility model side schematic view.
Embodiment
Embodiment:
As shown in Figure 1, battery electric quantity measuring instrument by power supply circuit 1, display circuit 2, metering circuit 3 forms; In power supply circuit 1, alternating-current voltage source exports DC voltage by AC/DC change-over circuit.The forward output terminal of power supply circuit 1 is series-connected to the ground end of power supply circuit 1 by the resistance that one is connected to form by the ground end resistance 17 of the anode resistance 14 of 35K ohm, first divider resistance 15 of 2K ohm, second divider resistance 16 of 2K ohm and 10K ohm successively.First divider resistance 15, second divider resistance 16 is connected with the inverting input of tertiary voltage comparer 7 with the first voltage comparator 5, second voltage comparator 6 near the one end in the forward output terminal direction of power supply circuit 1 respectively with ground end resistance 17 3 resistance, and the in-phase input end of three voltage comparators is all connected to mesuring battary voltage 12.After the output terminal of the first voltage comparator 5, second voltage comparator 6 and tertiary voltage comparer 7 is connected respectively to the first indication LED 8, second indication LED 9 and the 3rd indication LED 10, then be connected to the ground end of power supply circuit respectively by the current-limiting resistance 4 of 250 ohm.Cell voltage is compared by voltage comparator and three voltage values, and when cell voltage is greater than the magnitude of voltage of anode resistance 14 and first divider resistance 15 connecting place, three light emitting diodes all can be lit, and represents that battery electric quantity is sufficient.If cell voltage is less than the magnitude of voltage of anode resistance 14 and first divider resistance 15 connecting place, but two light emitting diodes can be lit when being greater than the magnitude of voltage of first divider resistance 15 and the second divider resistance 16 junction, represent that cell voltage is between 1.2V-1.4V.
If cell voltage is less than the magnitude of voltage of first divider resistance 15 and the second divider resistance 16 junction, but be greater than the light emitting diode when magnitude of voltage of resistance 17 junction hold on second divider resistance 16 and ground can be lit, expression cell voltage is between 1.0V-1.2V.Otherwise represent that battery electric quantity is not enough.
As shown in Figure 2, light emitting diode 8,9,10 is used for showing the electricity of remaining battery, the desirable long 49mm of battery compartment 18, wide 14mm, is used for placing battery.
As shown in Figure 3, the metallic plug 19 of AC interface is rotated 90 degree, the sheet metal stretched out inserts socket just can make measuring instrument work, and in figure, dotted line frame is battery compartment.
When using the utility model, by storehouse, battery discharge pond 18 to be measured, then the metallic plug 19 of AC interface is rotated 90 degree, the sheet metal stretched out inserts common AC220V socket, and by light emitting diode 8,9,10 show the remaining electricity of battery.
The foregoing is only preferred embodiment of the present utility model.
Claims (2)
1. a battery electric quantity measuring instrument, it is characterized in that, comprise a power supply circuit, described power supply circuit comprises again AC interface and alterating and direct current voltage conversion circuit, described alterating and direct current voltage conversion circuit forward output terminal passes through one successively by anode resistance, first divider resistance, the resistance that second divider resistance and ground end resistance are connected to form is series-connected to the ground end of alterating and direct current voltage conversion circuit, first divider resistance, second divider resistance and ground end resistance three resistance near the forward output terminal direction of alterating and direct current voltage conversion circuit one end respectively with the first voltage comparator, second voltage comparator is connected with the inverting input of tertiary voltage comparer, the in-phase input end of described three voltage comparators is all connected to mesuring battary voltage positive input, described first voltage comparator, the output terminal of the second voltage comparator and tertiary voltage comparer is connected respectively to the first indication LED, after second indication LED and the 3rd indication LED, the ground end of alterating and direct current voltage conversion circuit is connected to again respectively by a current-limiting resistance.
2. a kind of battery electric quantity measuring instrument according to claim 1, is characterized in that the AC interface of described power supply circuit is a pair rotatable metallic plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420203962.2U CN204142928U (en) | 2014-04-23 | 2014-04-23 | A kind of battery electric quantity measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420203962.2U CN204142928U (en) | 2014-04-23 | 2014-04-23 | A kind of battery electric quantity measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204142928U true CN204142928U (en) | 2015-02-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420203962.2U Expired - Fee Related CN204142928U (en) | 2014-04-23 | 2014-04-23 | A kind of battery electric quantity measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204142928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965158A (en) * | 2015-05-21 | 2015-10-07 | 武汉大学 | Improved ultrahigh-frequency partial discharge capacity detection acquiring device and method |
-
2014
- 2014-04-23 CN CN201420203962.2U patent/CN204142928U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965158A (en) * | 2015-05-21 | 2015-10-07 | 武汉大学 | Improved ultrahigh-frequency partial discharge capacity detection acquiring device and method |
| CN104965158B (en) * | 2015-05-21 | 2018-02-09 | 武汉大学 | A kind of improved high-frequency local discharging electric power detection harvester and method |
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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 |
Granted publication date: 20150204 Termination date: 20150423 |
|
| EXPY | Termination of patent right or utility model |