CN202033461U - Circuit detecting the type and temperature of battery in single-track manner - Google Patents
Circuit detecting the type and temperature of battery in single-track manner Download PDFInfo
- Publication number
- CN202033461U CN202033461U CN2011200131550U CN201120013155U CN202033461U CN 202033461 U CN202033461 U CN 202033461U CN 2011200131550 U CN2011200131550 U CN 2011200131550U CN 201120013155 U CN201120013155 U CN 201120013155U CN 202033461 U CN202033461 U CN 202033461U
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- battery
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- temperature
- type
- charger
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the charger circuit technology field, especially to a circuit detecting the type and temperature of a battery in a single-track manner. The circuit detecting the type and temperature of the battery in the single-track manner comprises a charger and a battery bag, and the charger comprises a charging control module, a drive circuit module and a level conversion module. The charger is connected with the battery bag, and the charging control module, the drive circuit module and the level conversion module are connected with each other to form a closed circuit. The structure of the circuit detecting the type and temperature of the battery in the single-track manner is simple and scientific, by using the circuit detecting the type and temperature of the battery in the single-track manner, the battery type can be judged and the battery temperature can be detected, on the base of retaining the battery temperature detecting function, the battery type detecting function can be added without changing the connection structure of the circuit. The circuit detecting the type and temperature of the battery in the single-track manner has good compatibility with the older battery, is able to use the same one charger, and has good safety performance.
Description
Technical field:
The utility model relates to the charger circuit technical field, refers in particular to the circuit that a kind of single line detects battery types and temperature.
Background technology:
At present, the application of lithium battery is more and more, because, lithium battery need not judge that unlike nickel-cadmium battery the joint number of battery promptly can control charging, charger need judge that battery types charges, and the scheme of present judgement battery types uses individual pin to judge its resistance more, to judge battery types, because interface changes, this scheme circuit can not general old edition battery.
The utility model content:
The purpose of this utility model is at the deficiencies in the prior art, and provide a kind of single line to detect the circuit of battery types and temperature, the simple science of its structural design, can judge the temperature of battery types and detection battery, detect on the function of battery temperature and do not change its syndeton, just can add the function that detects battery types, can well compatible old edition battery, use same charger, security performance is good.
For achieving the above object, the utility model adopts following technical scheme, it comprises charger, power brick, charger comprises charge control module, drive circuit module, level switch module, charger is connected with power brick, and charge control module, drive circuit module, level switch module are interconnected to form a closed circuit.
One end ground connection of described charger.
Described power brick is made of electric battery, thermistor and an above diode.
The utility model beneficial effect is: charger comprises charge control module, drive circuit module, level switch module, charger is connected with power brick, charge control module, drive circuit module, level switch module are interconnected to form a closed circuit, can judge the temperature of battery types and detection battery, do not change its syndeton on the function of detection battery temperature, just can add the function that detects battery types, can well compatible old edition battery, use same charger, security performance is good.
Description of drawings:
Fig. 1 is a circuit working principle schematic of the present utility model;
Fig. 2 is the circuit theory diagrams of four kinds of different embodiment power brick of the utility model;
Fig. 3 is the circuit theory synoptic diagram of the utility model drive circuit module;
Fig. 4 is the circuit theory synoptic diagram of the utility model level switch module.
Embodiment:
See that Fig. 1 is to shown in Figure 4: the utility model comprises charger 1, power brick 2, it is characterized in that: charger 1 comprises charge control module 11, drive circuit module 12, level switch module 13, charger 1 is connected with power brick 2, and charge control module 11, drive circuit module 12, level switch module 13 are interconnected to form a closed circuit.
One end ground connection of described charger 1.
Described power brick 1 is made of electric battery, thermistor and an above diode.
This detection scheme is on the thermistor of battery and several series diode D2, D3 that oppositely connects, D4 or the like.When detecting battery temperature, driving circuit output voltage V r is a positive voltage, and at this moment the diode that oppositely connects is inoperative, normally detects the resistance of RT1.In the time will detecting battery types, driving circuit output voltage V r is more low-impedance negative voltage, because driving impedance is lower, the effect of RT1 can be ignored within the specific limits.Utilize the diode forward forward voltage to be fixed as the principle of Vd, can calculate diode number N=Vr ÷ Vd.Judge cell types from the number N of diode.
Fig. 1 is this programme circuit structure diagram.Wherein charging control circuit module 11 control Driver Circuit modules 12 are undertaken battery charge by testing circuit sampled voltage data and interpretation cell types.Drive circuit module 12 is the circuit that can control output positive voltage and negative voltage.The effect of level shifting circuit module 13 is that detected positive voltage or negative voltage are transferred to the positive voltage information that can discern for control circuit.Power brick is made up of multiple batteries group, thermistor and some diodes.Wherein thermistor is used to detect battery temperature, and diode is used to detect battery types.
Fig. 2 is A, B, C, D 4 types of power brick, when input voltage Vr is negative voltage, the effect of hypothesis RT1 earlier can be ignored, the series connection number of diode in circuit will determine the magnitude of voltage of Vr, if single diode drop is Vd, then, the Vr=Vd of type 2, the Vr=2*Vd of type 3, the Vr=3*Vd of type 4.
The voltage of Class1 is determined by the R4 of driving circuit among RT1 and Fig. 3.Because RT1 can influence the voltage of Vr, suppose the high energy work in battery 60 degree of charger, can not work 70 degree the time so, at this moment do not need to have judged cell types yet.The resistance of RT1 is Re when spending as if 70, at this moment Vr=V*Re ÷ (R4+Re).Owing to will guarantee the correctness of battery interpretation, make Vr 〉=4Vd that judgement can not made mistakes, the span that at this moment requires V*Re ÷ (R4+Re) 〉=4*Vd to obtain R4 is R4≤V*Re ÷ (4*Vd)-Re.When R4 is this span, do not insert the voltage Vr 〉=4*Vd of diode, so in battery 70 degree following access style 2, type 3 and type 4 type of detection, the RT1 thermistor is to not influence of voltage Vr.
Fig. 3 is a driving circuit.Wherein Q1 and Q2 are field effect transistor, are respectively applied for to drive pull-up resistor R34 and pull down resistor R4.The effect of Q3, R27, R20 is equivalent to a phase inverter, drives the field effect transistor Q2 of negative voltage side.
As COM1, when COM2 is input as high level, Q1 does not have effect by pull-up resistor R34.Q3 also ends, and R20 drags down the drive level of Q2, and Q2 is also ended, and pull down resistor R4 is inoperative.
When COM1 is input as low level, when COM2 was input as high level, Q2 ended, and pull down resistor R4 is inoperative.The Q1 conducting, pull-up resistor R34 moves Vr to positive voltage, and the diode of battery the inside is inoperative, and at this moment the thermistor RT1 dividing potential drop of R34 and battery the inside obtains Vr and is used to the battery temperature that converts.
When COM2 is input as low level, when COM1 was input as high level, Q1 ended, and pull-up resistor R34 is inoperative.The Q2 conducting, pull down resistor R4 moves Vr to negative voltage, and at this moment the diode of battery the inside works, and voltage Vr is restricted to certain value, and circuit will be judged cell types according to Vr value at this moment.
Fig. 4 is a level shifting circuit.OP1 among the figure and OP2 are operational amplifiers, use the positive voltage power supply also, are the input of operational amplifier negative pressure with the ground of circuit, make its output can not export negative voltage.OP1, R25 and R26 form a phase inverter, its role is to the negative voltage when detecting battery types, convert that control circuit can discern to positive voltage, at this moment AD2=-Vr, AD1=0.OP2 and R66 form a tracker, in the time of the detected temperatures value, the Vr value are delivered to the AD1 mouth, at this moment AD1=Vr, AD2=0.
The course of work:
When detected temperatures, make COM1 be input as low level, when COM2 is input as high level.Read the magnitude of voltage of AD1 again.Magnitude of voltage conversion according to AD1 obtains Current Temperatures.
When type of detection, make COM2 be input as low level, when COM1 is input as high level.Read the magnitude of voltage of AD2 again.Voltage according to AD2 is judged cell types.If AD2 〉=4*Vd, its type cell bag type is the A type; If AD2 ≈ is Vd, its type cell bag type is a Type B; If AD2 ≈ is 2*Vd, its type cell bag type is the C type; If AD2 ≈ is 3*Vd, its type cell bag type is the D type.
When reaching battery temperature when too high, this example is to be higher than 70 degree.At this moment detect battery types and will become unreliable, at this moment can not detect battery types.
The above only is preferred embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.
Claims (3)
1. a single line detects the circuit of battery types and temperature, it comprises charger (1), power brick (2), it is characterized in that: charger (1) comprises charge control module (11), drive circuit module (12), level switch module (13), charger (1) is connected with power brick (2), and charge control module (11), drive circuit module (12), level switch module (13) are interconnected to form a closed circuit.
2. a kind of single line according to claim 1 detects the circuit of battery types and temperature, it is characterized in that: an end ground connection of described charger (1).
3. a kind of single line according to claim 1 detects the circuit of battery types and temperature, and it is characterized in that: described power brick (1) is made of electric battery, thermistor and an above diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200131550U CN202033461U (en) | 2011-01-17 | 2011-01-17 | Circuit detecting the type and temperature of battery in single-track manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200131550U CN202033461U (en) | 2011-01-17 | 2011-01-17 | Circuit detecting the type and temperature of battery in single-track manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202033461U true CN202033461U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200131550U Expired - Fee Related CN202033461U (en) | 2011-01-17 | 2011-01-17 | Circuit detecting the type and temperature of battery in single-track manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202033461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884383A (en) * | 2014-03-28 | 2014-06-25 | 深圳市中兴移动通信有限公司 | Temperature measurement and identification circuit of built-in battery, battery, detecting device and detecting method |
-
2011
- 2011-01-17 CN CN2011200131550U patent/CN202033461U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884383A (en) * | 2014-03-28 | 2014-06-25 | 深圳市中兴移动通信有限公司 | Temperature measurement and identification circuit of built-in battery, battery, detecting device and detecting method |
| CN103884383B (en) * | 2014-03-28 | 2017-12-08 | 努比亚技术有限公司 | The thermometric and identification circuit of a kind of internal battery, battery, detection means and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20140117 |