CN202817843U - Lithium battery charging circuit which can be charged while using and is used on laser surveying and mapping instrument - Google Patents
Lithium battery charging circuit which can be charged while using and is used on laser surveying and mapping instrument Download PDFInfo
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- CN202817843U CN202817843U CN 201220501574 CN201220501574U CN202817843U CN 202817843 U CN202817843 U CN 202817843U CN 201220501574 CN201220501574 CN 201220501574 CN 201220501574 U CN201220501574 U CN 201220501574U CN 202817843 U CN202817843 U CN 202817843U
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Abstract
The utility model discloses a lithium battery charging circuit which can be charged while using, wherein the lithium battery charging circuit can be placed in the battery box of a laser surveying and mapping instrument. The lithium battery charging circuit comprises an external power interface (1), a lithium battery charging management unit(2), a 8.4V lithium ion battery pack (3), a power switching circuit (4) and a surveying and mapping instrument interface (5). The lithium battery charging circuit has the following advantages: the lithium battery charging circuit can be charged while using, so the advantage of flexible and convenient utilization can be realized, and the lithium battery charging circuit is suitable for various occasions; compared with a dry battery, a nickel-hydrogen rechargeable battery and a nickel-cadmium rechargeable battery, for a lithium ion battery pack, importantly, under the condition of a same battery power, the size of the lithium ion battery pack is much smaller than the size of the dry battery, the size of the nickel-hydrogen rechargeable battery and the size of the nickel-cadmium rechargeable battery; the internal resistance of the lithium ion rechargeable battery is much smaller than the internal resistance of the nickel-hydrogen rechargeable battery and the internal resistance of the nickel-cadmium rechargeable battery, so the loss of the battery itself can be effectively reduced, and the energy conversion and utilization efficiency can be improved; compared with the nickel-hydrogen rechargeable battery and the nickel-cadmium rechargeable battery, the memory effect of the lithium ion battery is small or can be ignored completely; and the time of the surveying and mapping operation of the surveying and mapping instrument can be prolonged, and the working efficiency of the operation of the surveying and mapping instrument can be improved.
Description
Technical field
The utility model relates to laser mapping instrument technical field, but specifically a kind of for the lithium battery charging circuit of using while filling on the laser mapping instrument.
Background technology
Existing instrument of surveying and mapping, the employing ni-mh that has, Ni-Cd nickel-cadmium power supply, the employing alkaline dry battery that has power supply.And traditional ni-mh, Ni-Cd nickel-cadmium capacity are little, and volume is large, and has memory effect.The alkaline dry battery capacity is less, is easily-consumed products, needs to change for a long time, and the battery of replacing produces again severe contamination to environment.Nowadays, instrument of surveying and mapping is widely used in the aspects such as interior decoration, outdoor road construction, project installation, construction, project supervision, even is applied in addition the particular surroundingss such as uninhabited remote mountain areas.Applied environment complicated and changeable has proposed requirements at the higher level to the electric supply system of instrument of surveying and mapping.
Summary of the invention
The purpose of this utility model is the inconvenience that exists in actual applications in order to overcome above-mentioned instrument of surveying and mapping power supply, provide a kind of easy to use, but for the lithium battery charging circuit scheme of using while filling on the instrument of surveying and mapping, it is short to have solved instrument of surveying and mapping instrument power using time in applied environment complicated and changeable fully, need often to change or charging, the office operation of instrument of surveying and mapping instrument can not use external 220V electric main, and outdoor work can not use the problem such as external high power capacity storage battery to improve the operating efficiency of mapping operation.The utility model is with notebook, and the power solution of the electronic products such as mobile phone is applied in the instrument of surveying and mapping aspect, adopts present reliability high, capacity is large, and free of contamination lithium ion battery group is powered, and can make things convenient for external various power supply, such as the high-capacity lead-acid accumulator jar, 220V electric main etc.In addition, because lithium battery does not have memory effect, this utility model can also be charged to instrument in the instrument use procedure simultaneously, has prolonged the mapping activity duration of instrument of surveying and mapping.Solved the problem that instrument of surveying and mapping is powered to instrument in various application scenarios fully.
The technical solution of the utility model is as follows:
But a kind of lithium battery charging circuit of using while filling comprises: external power interface 1, lithium cell charging administrative unit 2,8.4V lithium ion battery group 3, power supply switch circuit 4, instrument of surveying and mapping instrumentation tap 5; Described external power interface 1 is connected with interface J1; 8.4V the positive end interface of lithium ion battery group 3 is connected with interface J3, Li-Ion rechargeable battery group negative terminal interface is connected with interface J4, and Li-Ion rechargeable battery group thermistor interface is connected with interface J5; The positive end interface of the power supply of instrument of surveying and mapping instrumentation tap 5 is connected with interface J2; The power supply negative terminal interface of instrument of surveying and mapping instrument interface 5 is connected with interface J6.
Described lithium cell charging administrative unit 2 comprises: lithium ion battery group charging management chip U1, power filtering capacitor C1, C2, C3, C6, bootstrap capacitor C4, stop charging interval programming capacitor C 5, voltage loop building-out capacitor C7, current loop building-out capacitor C8, anti-power supply reversal connection Schottky diode D1, the two Schottky diode D3 of common cathode, rectifier diode D4, common anode utmost point dichromatic LED D5, luminous tube current-limiting resistance R3, R4, charging current arranges resistance R 5, temperature sampling divider resistance R6, voltage loop compensating resistance R7, current loop compensating resistance R8, negative tempperature coefficient thermistor RNTC, filter inductance L1, external power source input connector J1, the positive end interface J3 of Li-Ion rechargeable battery group, Li-Ion rechargeable battery group negative terminal interface J4, Li-Ion rechargeable battery group thermistor interface J5, instrument power supply negative terminal interface J6.Wherein:
A, the 1st pin of described lithium ion battery group charging management chip U1 and resistance R 6 one ends, thermistor RNTC one end and interface J5 are connected, the 2nd pin is connected with resistance R 3 one ends, the 3rd pin is connected with resistance R 4 one ends, the 4th pin is connected with capacitor C 3 one ends, the 6th pin is connected with capacitor C 3 other ends and ground connection, the 7th pin and the 4th pin, the 2nd pin of the other end of resistance R 6 and dichromatic LED D5 is connected, the 8th pin is connected with resistance R 7 one ends, the 9th pin is connected with resistance R 8 one ends, the 10th pin and resistance R 5 one ends, capacitor C 6 one ends and interface J3 are connected, the 11st pin is connected with the other end of inductance L 1 one ends and resistance R 5, the 12nd pin is connected with capacitor C 5 one ends and ground connection, the 13rd pin is connected with the other end of capacitor C 5, the 14th pin is connected with capacitor C 4 one ends, the 1st pin of the other end of the 15th pin and capacitor C 4 and diode D3, the 3rd pin is connected, and the 16th pin is connected with an end of capacitor C 2 and the negative pole of diode D1.
The positive pole of b, described anti-power supply reversal connection Schottky diode D1 is connected with the 1st pin of an end of capacitor C 1 and external power source input connector J1; The other end of capacitor C 1 is connected with the 2nd pin of connector J1 and ground connection; The other end of resistance R 3 is connected with the 3rd pin of dichromatic LED D5; The other end of resistance R 4 is connected with the 1st pin of dichromatic LED D5; The other end of resistance R 7 is connected with capacitor C 7 one ends; The other end ground connection of capacitor C 7; The other end of resistance R 8 is connected with capacitor C 8 one ends; The other end of capacitor C 8 is connected with interface J6 and ground connection; The other end of inductance L 1 is connected with the 2nd pin and the rectifier diode D4 negative pole of diode D3; Rectifier diode D4 minus earth; The other end of capacitor C 6 is connected with interface J4; The other end ground connection of capacitor C 2.
Described power supply switch circuit 4 comprises: anti-electric current pours in down a chimney protection Schottky diode D2, divider resistance R1, R2, P-MOS field effect transistor Q1, the positive end interface J2 of instrument power supply.Wherein said diode D2 is anodal to be connected with an end of resistance R 1 and the 1st pin of external power source input connector J1; Diode D2 negative pole is connected with D end and the positive end interface J2 of instrument power supply of P-MOS field effect transistor Q1; The S end of P-MOS field effect transistor Q1 is connected with the positive end interface J3 of Li-Ion rechargeable battery group; The G end of P-MOS field effect transistor Q1 is connected with the other end of resistance R 1 and an end of resistance R 2; The other end ground connection of R2.
Wherein external power supply 1 can be that 220V exchanges the power supply adaptor that turns the 12V direct current, also can be 12V high-capacity lead-acid accumulator jar etc., and its effect provides the energy to lithium ion cell charging; Lithium cell charging administrative unit 2 is made of a kind of integrated level higher charging management chip and part peripheral component, it mainly finishes the Charge Management work to lithium ion battery, comprise the charging current programming, the charged state indication, the battery temperature monitoring, charge-current limit, Chargeable heat switch management and able to programmely stop the charging interval and set etc.; 8.4V lithium ion battery group 3 is the 18650 battery cores series connection by 2 3.7V/2200mAh, and then and 18650 battery cores of other one group of 2 3.7V/2200mAh are in parallel consists of, the whole lithium ion battery group that forms the high electric weight of 8.4V/4400mAh, its inside also comprises the short-circuit protection circuit unit, and the over-discharge protection circuit unit is to prolong the useful life of lithium ion battery group; Power supply switch circuit 4 is made of the P-MOS FET switch circuit of a low on-resistance, disconnecting former lithium battery when being used for using external power source to lithium cell charging discharges to instrument of surveying and mapping, and switch to external power source and power to instrument of surveying and mapping, realize the function of powering to instrument of surveying and mapping again when charge to the lithium ion battery group in the limit; Instrument of surveying and mapping instrument 5 inside comprise a voltage stabilizing managing chip, allow instrument of surveying and mapping energy simultaneous adaptation 8.4V lithium ion battery group and 12V external direct current power supply power.
Basic functional principle of the present utility model: to the instrument power source power supply, can adopt lithium ion surplus electric weight to the instrument supply power mode, also can adopt external power supply to power to instrument.When J1 mouth during without external power supply, the G end of P-MOS pipe Q1 is low level, and Vgs is low level, and field effect transistor Q1 is open-minded, and the J2 interface is output as lithium battery voltage.What select is the very little P-MOS field effect transistor of conducting resistance Rgd herein, has reduced the power loss on the switching tube.When the J1 mouth inserted external power supply, the G terminal voltage was about 12V, and the S terminal voltage is lithium battery output, maximum is output as 8.4V, and Vgs is high level, field effect transistor Q1 cut-off, to the J2 mouth, at this moment, the instrument power supply is the external power supply electric weight to external power supply voltage through diode D2.When inserting external power supply, the lithium cell charging managing chip begins to charge to the lithium battery group.Because lithium battery does not have memory effect, so can in time charge, its charging times is limited, but notices that this charging times life-span refers to charge and discharge fully number of times, in other words, it has charges the life-span for 500 times fully, if you are at every turn only with half just charging, it just has 1000 times charging life-span, this charging modes has been applied in the portable type electronic product, such as mobile phone and notebook computer etc. very widely.This is designed in the process of lithium cell charging, disconnects lithium battery and externally discharges, and the problem of discharging again in the process of having avoided the lithium battery group to charge has effectively prolonged the useful life of lithium battery group.
In sum, the utlity model has following advantage: (1), can be while filling usefulness, flexible and convenient to use, can adapt to various occasions: but a kind of lithium battery charging circuit of using while filling of the utility model can use at indoor, outdoor portable mobile everywhere; Can be convenient to use for a long time by external 220V electric main indoor, save the trouble of frequent battery; In outdoor particular surroundings, also can be equipped with jumbo lead-acid accumulator and extend working time, save the trouble that battery can't charge.(2), volume is little, high power capacity: the contrast dry cell, ni-mh, Ni-Cd nickel-cadmium, the lithium ion battery group, importantly in the same charge situation, lithium ion battery group volume ratio dry cell and ni-mh, Ni-Cd nickel-cadmium volume are much smaller.This advantage is particularly outstanding, and it has embodied the significant advantage that this portable product is easy to carry, service time is longer.(3), high efficiency: the Li-Ion rechargeable battery internal resistance is little more a lot of than ni-mh, Ni-Cd nickel-cadmium, can effectively reduce like this loss of battery self.Improved the conversion service efficiency of the energy.(4), memory-less effect: the ni-mh of comparing, Ni-Cd nickel-cadmium, the memory effect of lithium ion battery is less, can ignore do not remember fully.Thoroughly do not charge for a long time, discharge if battery belongs to nickel-cadmium cell, owing to memory effect of cell is easily left a trace, and reduce battery capacity in battery.And there is not this effect in lithium ion battery.(5), prolong mapping activity duration of instrument of surveying and mapping, improved the operating efficiency of instrument of surveying and mapping operation.
Description of drawings
Fig. 1 is the theory diagram that the utility model realization is used while filling.
Fig. 2 is that the utility model is used circuit theory diagrams while filling.
Embodiment
According to shown in Figure 1, but a kind of lithium battery charging circuit of using while filling comprises external power interface 1, lithium cell charging administrative unit 2,8.4V lithium ion battery group 3, power supply switch circuit 4, instrument of surveying and mapping instrumentation tap 5; Described external power interface 1 is connected with interface J1; 8.4V the positive end interface of lithium ion battery group 3 is connected with interface J3, Li-Ion rechargeable battery group negative terminal interface is connected with interface J4, and Li-Ion rechargeable battery group thermistor interface is connected with interface J5; The positive end interface of the power supply of instrument of surveying and mapping instrumentation tap 5 is connected with interface J2; The power supply negative terminal interface of instrument of surveying and mapping instrument interface 5 is connected with interface J6.
According to shown in Figure 2, but a kind of course of work of the lithium battery charging circuit of using while filling is: adopt U1 as MP2610ER as lithium ion battery group charging management chip, when external power source inserts the J1 mouth, the external 12V power supply of J1 mouth powers on to chip U1 through diode D1, chip at first can carry out precharge to the lithium battery group, and the 8.4V level of PWM pattern output ripple is adopted in precharge.When lithium battery through after the pre-charge process voltage recovery, chip enters the constant voltage charge pattern, charging process is by dual color light emitting diode D5 indication, when led color when being orange, expression is charged; When led color was green, charging was finished in expression; When Light-Emitting Diode extinguished, expression external power supply under-voltage locking or heat were turn-offed to quit work or exceed setting-up time and are namely stopped charging or forbid that charging enables.Charging current can be determined that by resistance R 5 concrete account form is 200mV/R5, and maximum charging current must not surpass 2A.When battery electric quantity is expired soon, enter the trickle charge process, trickle charge time and stop the charging interval and arranged by capacitor C 5 arranges specifically that to close be to equal (30 minutes xC5)/0.1uF the trickle charge time, stops the charging interval equaling (30 hours xC5)/0.1uF.The charging process chips is monitored battery temperature by negative tempperature coefficient thermistor, and when charging ambient temperature was too high, chip can stop battery being charged.
When J1 mouth during without external power supply, the G end of P-MOS pipe Q1 is low level, and Vgs is low level, and field effect transistor Q1 is open-minded, and the J2 interface is output as lithium battery voltage.What select is the very little P-MOS field effect transistor of conducting resistance Rgd herein, has reduced the power loss on the switching tube.When the J1 mouth inserted external power supply, the G terminal voltage was about 12V, and the S terminal voltage is lithium battery output, maximum is output as 8.4V, and Vgs is high level, field effect transistor Q1 cut-off, to the J2 mouth, at this moment, the instrument power supply is the external power supply electric weight to external power supply voltage through diode D2.When inserting external power supply, lithium cell charging managing chip U1 begins to charge to the lithium battery group.
Claims (3)
1. but a lithium battery charging circuit of using while filling can be positioned in the laser mapping instrument battery case, and it comprises: external power interface (1), lithium cell charging administrative unit (2), 8.4V lithium ion battery group (3), power supply switch circuit (4), instrument of surveying and mapping instrumentation tap (5); Described external power interface (1) is connected with interface J1; 8.4V the positive end interface of lithium ion battery group (3) is connected with interface J3, Li-Ion rechargeable battery group negative terminal interface is connected with interface J4, and Li-Ion rechargeable battery group thermistor interface is connected with interface J5; The positive end interface of power supply of instrument of surveying and mapping instrumentation tap (5) is connected with interface J2; The power supply negative terminal interface of instrument of surveying and mapping instrument interface (5) is connected with interface J6.
2. but root a tree name a kind of lithium battery charging circuit of using while filling claimed in claim 1, it is characterized in that: described lithium cell charging administrative unit (2) comprising: lithium ion battery group charging management chip U1, power filtering capacitor C1, C2, C3, C6, bootstrap capacitor C4, stop charging interval programming capacitor C 5, voltage loop building-out capacitor C7, current loop building-out capacitor C8, anti-power supply reversal connection Schottky diode D1, the two Schottky diode D3 of common cathode, rectifier diode D4, common anode utmost point dichromatic LED D5, luminous tube current-limiting resistance R3, R4, charging current arranges resistance R 5, temperature sampling divider resistance R6, voltage loop compensating resistance R7, current loop compensating resistance R8, negative tempperature coefficient thermistor RNTC, filter inductance L1, external power source input connector J1, the positive end interface J3 of Li-Ion rechargeable battery group, Li-Ion rechargeable battery group negative terminal interface J4, Li-Ion rechargeable battery group thermistor interface J5, instrument power supply negative terminal interface J6, wherein:
A. the 1st pin of described lithium ion battery group charging management chip U1 and resistance R 6 one ends, thermistor RNTC one end and interface J5 are connected, the 2nd pin is connected with resistance R 3 one ends, the 3rd pin is connected with resistance R 4 one ends, the 4th pin is connected with capacitor C 3 one ends, the 6th pin is connected with capacitor C 3 other ends and ground connection, the 7th pin and the 4th pin, the 2nd pin of the other end of resistance R 6 and dichromatic LED D5 is connected, the 8th pin is connected with resistance R 7 one ends, the 9th pin is connected with resistance R 8 one ends, the 10th pin and resistance R 5 one ends, capacitor C 6 one ends and interface J3 are connected, the 11st pin is connected with the other end of inductance L 1 one ends and resistance R 5, the 12nd pin is connected with capacitor C 5 one ends and ground connection, the 13rd pin is connected with the other end of capacitor C 5, the 14th pin is connected with capacitor C 4 one ends, the 1st pin of the other end of the 15th pin and capacitor C 4 and diode D3, the 3rd pin is connected, and the 16th pin is connected with an end of capacitor C 2 and the negative pole of diode D1;
B. the positive pole of described anti-power supply reversal connection Schottky diode D1 is connected with an end of capacitor C 1 and the 1st pin of external power source input connector J1; The other end of capacitor C 1 is connected with the 2nd pin of connector J1 and ground connection; The other end of resistance R 3 is connected with the 3rd pin of dichromatic LED D5; The other end of resistance R 4 is connected with the 1st pin of dichromatic LED D5; The other end of resistance R 7 is connected with capacitor C 7 one ends; The other end ground connection of capacitor C 7; The other end of resistance R 8 is connected with capacitor C 8 one ends; The other end of capacitor C 8 is connected with interface J6 and ground connection; The other end of inductance L 1 is connected with the 2nd pin and the rectifier diode D4 negative pole of diode D3; Rectifier diode D4 minus earth; The other end of capacitor C 6 is connected with interface J4; The other end ground connection of capacitor C 2.
3. but root a tree name a kind of lithium battery charging circuit of using while filling claimed in claim 1, it is characterized in that: described power supply switch circuit (4) comprising: anti-electric current pours in down a chimney protection Schottky diode D2, divider resistance R1, R2, P-MOS field effect transistor Q1, the positive end interface J2 of instrument power supply; Wherein said diode D2 is anodal to be connected with an end of resistance R 1 and the 1st pin of external power source input connector J1; Diode D2 negative pole is connected with D end and the positive end interface J2 of instrument power supply of P-MOS field effect transistor Q1; The S end of P-MOS field effect transistor Q1 is connected with the positive end interface J3 of Li-Ion rechargeable battery group; The G end of P-MOS field effect transistor Q1 is connected with the other end of resistance R 1 and an end of resistance R 2; The other end ground connection of R2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220501574 CN202817843U (en) | 2012-09-27 | 2012-09-27 | Lithium battery charging circuit which can be charged while using and is used on laser surveying and mapping instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220501574 CN202817843U (en) | 2012-09-27 | 2012-09-27 | Lithium battery charging circuit which can be charged while using and is used on laser surveying and mapping instrument |
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| CN202817843U true CN202817843U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220501574 Expired - Fee Related CN202817843U (en) | 2012-09-27 | 2012-09-27 | Lithium battery charging circuit which can be charged while using and is used on laser surveying and mapping instrument |
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| CN (1) | CN202817843U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771800A (en) * | 2016-11-23 | 2017-05-31 | 国家电网公司 | A kind of common core cable detection means |
| CN110995077A (en) * | 2019-12-19 | 2020-04-10 | 广东尚研电子科技有限公司 | Constant-voltage output control device and method for battery-powered motor |
-
2012
- 2012-09-27 CN CN 201220501574 patent/CN202817843U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771800A (en) * | 2016-11-23 | 2017-05-31 | 国家电网公司 | A kind of common core cable detection means |
| CN110995077A (en) * | 2019-12-19 | 2020-04-10 | 广东尚研电子科技有限公司 | Constant-voltage output control device and method for battery-powered motor |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150927 |
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| EXPY | Termination of patent right or utility model |