CN202798849U - Intrinsic safety type mobile phone - Google Patents
Intrinsic safety type mobile phone Download PDFInfo
- Publication number
- CN202798849U CN202798849U CN 201220485157 CN201220485157U CN202798849U CN 202798849 U CN202798849 U CN 202798849U CN 201220485157 CN201220485157 CN 201220485157 CN 201220485157 U CN201220485157 U CN 201220485157U CN 202798849 U CN202798849 U CN 202798849U
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- Prior art keywords
- battery
- mobile phone
- intrinsic safety
- safety type
- circuit
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- Expired - Fee Related
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- Protection Of Static Devices (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to an intrinsic safety type mobile phone and belongs to the technical field of mining communication devices. The intrinsic safety type mobile phone comprises a radio frequency unit, a logic unit and a mobile phone battery. A battery protection device is connected onto the mobile phone battery and comprises a battery protection circuit DW01, a fuse protector and a metal oxide semiconductor (MOS) tube 8205 A. The fuse protector is arranged between the cathode end of the mobile phone battery and the MOS tube 8205A and used for preventing overcurrent of the battery. The power supply end of the battery protection circuit DW01 is connected with an anode of the mobile phone battery through a sampling resistor, the over discharge detection circuit output end of the battery protection circuit DW01 is connected with the GATE 2 end of the MOS tube 8205A, and the over charge detection circuit output end of the battery protection circuit DW01 is connected with the GATE1 end. A power supply protection device is connected onto the mobile phone power supply, the battery protection circuit DW01 and a complementary metal oxide semiconductor (CMOS) tube in the battery protection device are utilized to achieve charge-discharge protection and short circuit protection of the battery, and the intrinsic safety type mobile phone can be safely used accordingly.
Description
Technical field
The utility model relates to a kind of intrinsic safety type mobile phone, belongs to mining communication equipment technical field.
Background technology
China is as maximum in the world producing coal country, coal production is concerning the people's safety of life and property, always be subject to the great attention of business and government, all mines that goes into operation of national regulation must be equipped with downhole personnel management system (location and work attendance) and communication equipment.But there are more deficiency in traditional underground communica tion and positioning means and device systems, exist that down-hole location work attendance precision is lower, the wireless mobile communications ability lacks, each system independently build cause part repeated construction and communication resource inefficiency, technical system backwardness standardization level is low and down-hole electric equipment explosive-proof grade is on the low side, the employing of intrinsically safe equipment not enough generally waits series of problems and deficiency, and the effect of performance is limited aspect anti-down-hole disaster and emergency management and rescue.
The utility model content
The purpose of this utility model provides a kind of intrinsic safety type mobile phone, can realize that downhole safety communicates by letter fast.
The utility model provides a kind of intrinsic safety type mobile phone for solving the problems of the technologies described above; comprise radio frequency unit; logical block and battery of mobile phone; be connected with battery protecting apparatus on the battery of mobile phone; this battery protecting apparatus comprises battery protecting circuit DW01; metal-oxide-semiconductor 8205A and fuse; fuse is arranged between the negative terminal and metal-oxide-semiconductor 8205A of battery of mobile phone; be used for preventing the battery overcurrent; the power end of battery protecting circuit DW01 links to each other with the positive pole of battery of mobile phone by a sampling resistor; the mistake of battery protecting circuit DW01 is put the testing circuit output and is linked to each other with the GATE2 end of metal-oxide-semiconductor 8205A, and the testing circuit output that overcharges of battery protecting circuit DW01 links to each other with the GATE1 end of metal-oxide-semiconductor 8205A.
Described battery protecting apparatus also comprises a spacing resistance, and this spacing resistance one end links to each other with the positive pole of battery of mobile phone, and the other end is drawn a port as the P+ end of this battery protecting apparatus.
The beneficial effects of the utility model are: the utility model is by connecting an apparatus for protecting power supply at cellular phone power supplies; realize battery charging and discharging protection and short-circuit protection by the battery protecting circuit DW01 in the battery protecting apparatus and CMOS pipe, thereby guarantee that this intrinsic safety type mobile phone also can safe use in the down-hole.
Description of drawings
Fig. 1 is the battery protecting apparatus structure chart of the utility model intrinsic safety type battery of mobile phone.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
Intrinsic safety type mobile phone of the present utility model comprises radio frequency unit; logical block and battery of mobile phone; be connected with battery protecting apparatus on the battery of mobile phone; the structure of this battery protecting apparatus as shown in Figure 1; comprise battery protecting circuit DW01; metal-oxide-semiconductor 8205A; sampling resistor R1 and R2 and spacing resistance R 4; fuse is arranged between the negative terminal and metal-oxide-semiconductor 8205A of battery of mobile phone; be used for preventing the battery overcurrent; the power end of battery protecting circuit DW01 links to each other with the positive pole of battery of mobile phone by a sampling resistor R1; the mistake of battery protecting circuit DW01 is put testing circuit output (the 1st pin) and is linked to each other with the GATE2 end (the 5th pin) of metal-oxide-semiconductor 8205A; the testing circuit output (the 3rd pin) that overcharges of battery protecting circuit DW01 links to each other with the GATE1 end (the 4th pin) of metal-oxide-semiconductor 8205A; the positive pole of battery of mobile phone is by the P+ of spacing resistance R 4 as this battery protecting apparatus; the negative pole of battery of mobile phone by behind the metal-oxide-semiconductor 8205A as the P-of this battery protecting apparatus; P-links to each other with 2 pin of DW01 by sampling resistor R2; P-draws a port T by a temperature detection resistance R3, is used for other external equipments are carried out temperature detection.
Its course of work is as follows: when mobile phone battery is pressed between the 2.5V to 4.3V; the 1st pin of DW01 is crossed and is put testing circuit output and the 3rd pin and overcharge the testing circuit output and all export high level (equaling supply power voltage); crus secunda voltage is 0V; this moment, the 1st pin and the 3rd pin voltage of DW01 will be added to respectively the 5th of 8205A; 4 pin; two electronic switches in the 8205A are received voltage from DW01 because of its G utmost point; so all be in conducting state; namely two electronic switches all are in out state; this moment, the negative pole of battery was equivalent to directly be communicated with the P-end of protective device, and protective device has Voltage-output.When battery of mobile phone discharges, the voltage of battery will slowly reduce, DW01 inside will be by R1 resistance Real-Time Monitoring cell voltage simultaneously, DW01 will think that cell voltage has been in the overdischarge voltage status when cell voltage drops to about 2.3V, just disconnect immediately the output voltage of the 1st pin, make the 1st pin voltage become 0V, the switching tube in the 8205A is closed because of the 5th pin no-voltage.Be in off-state between the P-of the B-of battery and protective device at this moment.The discharge loop that is battery is cut off, and battery will stop discharge.Protective device is in over-discharge state and keeps always.By the time after connecting charging voltage between the P of protective device and P-; DW01 just stops over-discharge state immediately after B-detects charging voltage; again at the 1st pin output HIGH voltage; make the overdischarge control valve conducting in the 8205A; be that the B-of battery and the P-of protective device connect again, battery directly charges through charger.
When battery charges normal by charger, increase along with the charging interval, the voltage of battery will be more and more higher, when cell voltage is elevated to 4.4V, DW01 will think that cell voltage has been in the overcharge voltage state, just disconnect immediately the output voltage of the 3rd pin, make the 3rd pin voltage become 0V, the switching tube in the 8205A is closed because of the 4th pin no-voltage.Be in off-state between the P-of the B-of battery and protective device at this moment.The charge circuit that is battery is cut off, and battery will stop charging.Protective device is in overcharge condition and keeps always.By the time after connecting discharge load between the P of protective device and P-; the control switch pipe is closed although overcharge in the time of therefore; but its inner diode positive direction is identical with the direction of discharge loop; so discharge loop can discharge; when the voltage of battery is placed to when being lower than 4.3V, DW01 stops the additives for overcharge protection state again at the 3rd pin output HIGH voltage, makes the control valve conducting of overcharging in the 8205A; the B-and the protective device P-that are battery connect again, and battery can discharge and recharge again normally.
As shown in Figure 1; in the process that protective device externally discharges; two electronic switches in the 8205A also not exclusively are equivalent to two mechanical switchs; but be equivalent to two resistance that resistance is very little; and be called the conducting internal resistance of 8205A; the conducting internal resistance of each switch be about 30m U 03a9 be about altogether 60m U 03a9; be added in voltage that G extremely goes up and be actually the size of conducting resistance of direct each switching tube of control when G pole tension during greater than 1V; the conducting internal resistance of switching tube very little (tens milliohms); be equivalent to switch closure; when the G pole tension was following less than 0.7V, the conducting internal resistance of switching tube very large (a few M Ω) was equivalent to switch and disconnects.Voltage U A is exactly the voltage that the conducting internal resistance of 8205A and discharging current produce, and load current increases then that UA must increase, and because UA0.006L * IUA is called again the tube voltage drop of 8205A, UA can letter connect the size that shows discharging current.Just think when rising to 0.2V that load current has arrived limiting value, so stop the output voltage of the 1st pin, the control of discharge pipe that the 1st pin voltage is become in 0V, the 8205A is closed, and cuts off the discharge loop of battery, will turn-off the control of discharge pipe.In other words the maximum current of DW01 permission output is 3.3A, thereby realizes overcurrent protection.Short-circuit protection is a kind of limiting form of overcurrent protection; its control procedure and principle are the same with overcurrent protection; short circuit just is being equivalent to add between P P-that the little resistance (being about 0 Ω) of resistance makes more than the instantaneous 10A of reaching of load current of protective device, and protective device carries out overcurrent protection immediately.
Claims (2)
1. intrinsic safety type mobile phone; comprise radio frequency unit; logical block and battery of mobile phone; it is characterized in that: be connected with battery protecting apparatus on the described battery of mobile phone; this battery protecting apparatus comprises battery protecting circuit DW01; metal-oxide-semiconductor 8205A and fuse; fuse is arranged between the negative terminal and metal-oxide-semiconductor 8205A of battery of mobile phone; be used for preventing the battery overcurrent; the power end of battery protecting circuit DW01 links to each other with the positive pole of battery of mobile phone by a sampling resistor; the mistake of battery protecting circuit DW01 is put the testing circuit output and is linked to each other with the GATE2 end of metal-oxide-semiconductor 8205A, and the testing circuit output that overcharges of battery protecting circuit DW01 links to each other with the GATE1 end of metal-oxide-semiconductor 8205A.
2. intrinsic safety type mobile phone according to claim 1, it is characterized in that: described battery protecting apparatus also comprises a spacing resistance, and this spacing resistance one end links to each other with the positive pole of battery of mobile phone, and the other end is drawn a port as the P+ end of this battery protecting apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220485157 CN202798849U (en) | 2012-09-21 | 2012-09-21 | Intrinsic safety type mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220485157 CN202798849U (en) | 2012-09-21 | 2012-09-21 | Intrinsic safety type mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202798849U true CN202798849U (en) | 2013-03-13 |
Family
ID=47826018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220485157 Expired - Fee Related CN202798849U (en) | 2012-09-21 | 2012-09-21 | Intrinsic safety type mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202798849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10879519B2 (en) | 2018-12-17 | 2020-12-29 | Bayco Products, Inc. | Spark protection apparatus for intrinsically safe, battery-operated devices |
-
2012
- 2012-09-21 CN CN 201220485157 patent/CN202798849U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10879519B2 (en) | 2018-12-17 | 2020-12-29 | Bayco Products, Inc. | Spark protection apparatus for intrinsically safe, battery-operated devices |
| US11450934B2 (en) | 2018-12-17 | 2022-09-20 | Bayco Products, Inc. | Spark protection apparatus for intrinsically safe, battery-operated devices |
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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: 20130313 Termination date: 20210921 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |