CN2285034Y - Chargeable intelligent nickel-hydrogen cell for camera - Google Patents
Chargeable intelligent nickel-hydrogen cell for camera Download PDFInfo
- Publication number
- CN2285034Y CN2285034Y CN 97236510 CN97236510U CN2285034Y CN 2285034 Y CN2285034 Y CN 2285034Y CN 97236510 CN97236510 CN 97236510 CN 97236510 U CN97236510 U CN 97236510U CN 2285034 Y CN2285034 Y CN 2285034Y
- Authority
- CN
- China
- Prior art keywords
- battery
- terminal
- nickel
- microprocessor
- video camera
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y02E60/12—
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides an intelligent nickel-hydrogen battery which is used for a video camera and can be safely charged on a nickel-cadmium battery charger of the video camera. The utility model comprises a set of nickel-hydrogen batteries and a charge/discharge controlling circuit of a microprocessor. The utility model is characterized in that a G terminal of a diverter is connected with an OUT terminal of the controlling circuit of the microprocessor; a D terminal of the diverter is connected with the positive electrode of a nickel-hydrogen battery E; an S terminal of the diverter is connected with one terminal of a resistor Rp, and the other terminal of the Rp is connected with the negative electrode of the nickel-hydrogen battery E at a F terminal of the controlling circuit of the microprocessor; a thermistor Rt is respectively connected with a 1 terminal and a 2 terminal of the controlling circuit of the microprocessor.
Description
The utility model belongs to field camera power supply class, be specifically a kind of do not gain in weight and the condition of portable volume under, can be multiplied the camera photography time, and can directly use video camera first wife's Ni-Cd battery charger to be full of the Ni-MH battery of electric weight.
Present news, the widely used professional rechargeable type video camera battery of film and tv industry, its inner core is the combination of cadmium-nickel storage cell.It has the following disadvantages: 1, battery capacity is less, and camera time is short; 2, have memory effect, often cause the actual discharge ability drop; 3, for overcoming memory effect, adopt the charging modes that recharges after the full discharge, not only the time long, and shortening battery useful life; 4, cadmium is a toxic metals, contaminated environment, harm humans health.
Deficiency at nickel-cadmium cell, once the someone attempted directly to replace with nickel-hydrogen accumulator, but the high-grade quick charger of professional camera arrangement, can only charge according to the nickel-cadmium cell characteristic, to the Ni-MH battery charging, then, often overcharged because of can not correctly judging the feature that is full of electric weight, cause Ni-MH battery gas leakage, leakage even burn battery.
The purpose of this utility model then is the problem at above-mentioned existence, designed a kind of microprocessor charge-discharge control circuit, make that adopting Ni-MH battery is the video camera battery of inner core, under the condition that does not change volume, can be on video camera first wife's Ni-Cd battery charger sufficient safely and fast electric weight.
The utility model technical solution:
A kind of rechargeable type video camera intelligence Ni-MH battery, it is characterized in that shunt G is terminated at microprocessor control circuit OUT end, D is terminated at Ni-MH battery group E positive pole, the S end links to each other with resistor R p one end, the Rp other end and the F end that is connected to microprocessor control circuit after Ni-MH battery E negative pole links to each other, thermistor Rt connects 1 end and 2 ends of microprocessor control circuit respectively.
The utility model has following advantage compared to existing technology:
1, adopt nickel-hydrogen accumulator to make electric core, have the capacity higher than cadmium-nickel storage cell, the longer life-span, there is not memory effect, there is not environmental pollution, the convenient use.
2, adopt the intelligent charge of forming by microprocessor chip to detect and control circuit, be loaded in the video camera battery box together with nickel-hydrogen accumulator.This battery case size is identical with old-fashioned nickel-cadmium cell box, therefore, no matter is charging or use, and interchangeability is fine.
3, owing to adopted the shunt circuit of microprocessor control, solved the difficult problem that nickel-hydrogen accumulator can not directly charge on the NI-G charger, saved the user and transformed or change expensive charger expense.
Fig. 1 is the utility model electrical schematic diagram.
Fig. 2 is the utility model shunt circuit schematic diagram.
Fig. 3 is the utility model microprocessor control circuit schematic diagram.
Below in conjunction with accompanying drawing the utility model is further described:
1, battery temperature detects principle:
Thermistor Rt connects microprocessor control circuit 1 end and 2 ends respectively.1 end and PIC16C54 microprocessor RA1 pin join, 2 ends and resistor R 1 lower end, and the R2 left end links to each other with capacitor C upper end.Termination microprocessor RA0 pin on the resistor R 1, the R2 right-hand member is connected with the RTCC pin with microprocessor RA2 respectively.The OUT end joins with microprocessor RB0 end, and the F end joins with microprocessor GND end.Under charged state, because thermistor Rt is close on the Ni-MH battery, its resistance value changes with the battery surface variation of temperature, and microprocessor control circuit is constantly gathered the resistance change amount of Rt, and is converted to the dT/dt temperature variation by microprocessor.When the dT/dt variable quantity reaches certain value, then judge that by microprocessor the Ni-MH battery charging reaches 100% capacity.
2, shunt circuit control principle:
Shunt is made of three terminal devices such as transistor or field effect transistor.Under charged state, after in a single day microprocessor control circuit judges that Ni-MH battery is full of electricity, then by OUT end output control signal, the triggering shunt is open-minded, and at this moment, the charging current that originally all flows through battery pack E will partly flow through from shunt, the charge circuit signal of telecommunication of charger is changed, when charger monitors the signal of this variation, just automatic charge closing loop, charging process finishes.
Claims (3)
1, a kind of rechargeable type video camera intelligence Ni-MH battery, it is characterized in that shunt G is terminated at microprocessor control circuit OUT end, D is terminated at Ni-MH battery group E positive pole, and S end links to each other with resistor R p one end, and the Rp other end is held with the F that is connected to little control and treatment circuit after Ni-MH battery E negative pole links to each other.
2, rechargeable type video camera intelligence Ni-MH battery according to claim 1 is characterized in that shunt is made of transistor or field effect transistor three terminal device.
3, rechargeable type video camera intelligence Ni-MH battery according to claim 1 is characterized in that thermistor Rt connects microprocessor control circuit 1 end and 2 ends respectively, and the microprocessor model is PIC16C54.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97236510 CN2285034Y (en) | 1996-12-10 | 1997-07-07 | Chargeable intelligent nickel-hydrogen cell for camera |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96243337 | 1996-12-10 | ||
| CN96243337.3 | 1996-12-10 | ||
| CN 97236510 CN2285034Y (en) | 1996-12-10 | 1997-07-07 | Chargeable intelligent nickel-hydrogen cell for camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2285034Y true CN2285034Y (en) | 1998-06-24 |
Family
ID=34065798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97236510 Expired - Fee Related CN2285034Y (en) | 1996-12-10 | 1997-07-07 | Chargeable intelligent nickel-hydrogen cell for camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2285034Y (en) |
-
1997
- 1997-07-07 CN CN 97236510 patent/CN2285034Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |