CN201450316U - Two-lithium-battery charging protection circuit - Google Patents
Two-lithium-battery charging protection circuit Download PDFInfo
- Publication number
- CN201450316U CN201450316U CN2009200532489U CN200920053248U CN201450316U CN 201450316 U CN201450316 U CN 201450316U CN 2009200532489 U CN2009200532489 U CN 2009200532489U CN 200920053248 U CN200920053248 U CN 200920053248U CN 201450316 U CN201450316 U CN 201450316U
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- lithium battery
- intelligent management
- triode
- charge
- voltage
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Abstract
The utility model discloses a two-lithium-battery charging protection circuit, which comprises an intelligent management IC and a lithium battery which is connected with a charging loop, and also comprises a voltage detection loop for detecting the voltage of the lithium battery, wherein the output end of the voltage detection loop is connected with the intelligent management IC, and the intelligent management IC is connected with an MOS tube Q2 on the charging loop through a control circuit; and also comprises another professional charging protection IC2, wherein the output end of the charging protection IC2 is serially connected with a triode Q1 on the charging loop so as to realize the secondary protection; and also comprises a discharging control circuit, wherein the discharging control circuit consists of triodes Q7 and Q14, an MOS tube Q15 and a peripheral element. Double protection of the lithium battery can be realized during the charging process, and the discharging control circuit improves the working stability of the lithium battery, so not only the energy efficiency of the battery can be effectively utilized, but also the battery is prevented from being over-discharged, and the service life of the lithium battery can be prolonged.
Description
Technical field
The utility model relates to a kind of charge protector that is used for charger, relates to a kind of can control discharging and recharging in particular, carries out the lithium battery two joint charge protectors of charge protection.
Background technology
Development along with lithium battery technology; cost performance improves constantly; more and more be subjected to liking of user; lithium battery is because of the energy density height; long service life; be widely used in various portable electronic equipments; as mobile phone; digital camera etc.; but, make when battery being charged, because the unsteadiness of power supply with charger owing to make the particularity of lithium battery chemical material; perhaps to the undue charging of battery; can cause the dilatancy of battery to damage, even blast, discharging and recharging of battery be protected so present finished product lithium battery all needs to be equipped with protective circuit.But traditional protective circuit circuit is stablized steady technical problem, can not control discharging and recharging effectively of lithium battery, has reduced the useful life of lithium battery.
The utility model content
A purpose of the present utility model is to overcome above-mentioned defective in the prior art: providing a kind of can control discharging and recharging in good time of lithium battery; improve the stability of charging process, and can effectively prolong the lithium battery lithium battery two joint charge protectors in useful life.
For achieving the above object; the technical scheme that the utility model provides is as follows: construct a kind of lithium battery two joint charge protectors; comprise intelligent management IC; the lithium battery that connects with charge circuit; also comprise the voltage detecting loop that is used to detect lithium battery voltage; the output in this voltage detecting loop connects with the input of intelligent management IC, and the output of intelligent management IC connects with metal-oxide-semiconductor Q2 on being connected in charge circuit by a control circuit.
As further improvement of the utility model, also comprise another professional charge protection IC2, this charge protection IC2 passes through Q13; D3; R20 is connected to Q3 on the charge circuit, and then control string Q1 realization second protection on charge circuit, loses efficacy even detect the loop; first order charging can not normal turn-off; cell voltage rises to the voltage set point of charge protection IC2, and charge protection IC2 will control Q1, makes its shutoff; stop charging, realize second protection.
Further improve as of the present utility model, also comprise a charge/discharge control circuit, describedly form by triode Q7, Q14, metal-oxide-semiconductor Q15, during regular picture, intelligent management IC exports a high level, triode Q7, Q14 conducting,, metal-oxide-semiconductor Q15 conducting, revolution, regular picture; When lithium battery forced down in intelligent management IC set point, intelligent management IC exported a low level, and triode Q7, Q14 end,, metal-oxide-semiconductor Q15 disconnects, motor stops operating, and makes lithium battery stop discharge.
The beneficial effect of lithium battery two joint charge protectors described in the utility model is: detect and control loop by second charging voltage that first charging voltage detects and control loop reaches by professional charge protection IC2 control that is connected with on charge circuit by intelligent management IC control, by first charging voltage of intelligent management IC control detect and control loop when detecting the loop operate as normal, Q2 controls charging process by the control metal-oxide-semiconductor, if it is out of hand to detect the loop, detect and control loop control triode Q1 by second charging voltage by professional charge protection IC2 control, triode Q1 is disconnected, stop lithium cell charging, thereby realized duplicate protection lithium cell charging; By charge/discharge control circuit, further improve the stability of lithium battery work in addition, can improve the useful life of lithium battery greatly.
Below in conjunction with drawings and Examples lithium battery two joint charge protectors described in the utility model are described further:
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model lithium battery two joint charge protectors.
Embodiment
Below the most preferred embodiment of lithium battery described in the utility model two joint charge protectors, therefore do not limit protection range of the present utility model.
With reference to Fig. 1; a kind of lithium battery two joint charge protectors are provided; comprise intelligent management IC8; the lithium battery 1 that connects with charge circuit; also comprise the voltage detecting loop 2 that is used to detect lithium battery 1 voltage; the output in this voltage detecting loop 2 connects with the input of intelligent management IC8, and the output of intelligent management IC8 connects with metal-oxide-semiconductor Q2 on being connected in charge circuit by a control circuit 3.Described voltage detecting loop 2 is by triode Q9, Q10, Q11, Q12, and divider resistance R36, R37, R38, R39 form, and by divider resistance R36, R37, R38, R39 dividing potential drop the voltage of detected lithium battery 1 are delivered to intelligent management IC8.
The output of described control circuit 3 and intelligent management IC8 resistance R 2, triode Q5, the resistance R 3 of coupled in series is successively formed, resistance R 2 connects with triode Q5 base stage, resistance R 3 connects with triode Q5 collector electrode, when the voltage that detects lithium battery 1 is higher than the set point of intelligent management IC8, intelligent management IC8 exports a low level, triode Q5 ends, and triode Q2 disconnects, and stops charging; When the voltage that detects lithium battery 1 was lower than the set point of intelligent management IC8, intelligent management IC8 exported a high level, triode Q5 conducting, and triode Q2 conducting charges normal.
By first charging voltage of intelligent management IC8 control detect and control loop when detecting the loop operate as normal, Q2 controls charging process by the control metal-oxide-semiconductor.
Also comprise another professional charge protection IC2; the output of this charge protection IC2 connects with triode Q1 on being connected in charge circuit by a control circuit 4; described control circuit 4 is made up of triode Q13, Q3, the Q4 that the output with intelligent management IC2 connects; during set point in detected charging voltage is higher than charge protection IC2; output one high level of IC2 is given triode Q3, triode Q3 conducting, and triode Q4 ends; triode Q1 disconnects, and stops charging.Thereby realized second protection to lithium cell charging.
Also comprise a charge/discharge control circuit 5, describedly form that during regular picture, intelligent management IC8 exports a high level by triode Q7, Q14, metal-oxide-semiconductor Q15, triode Q7, Q14 conducting,, metal-oxide-semiconductor Q15 conducting, motor 6 rotates regular picture; When lithium battery 1 voltage is lower than intelligent management IC8 set point, intelligent management IC8 one low level, triode Q7, Q14 end,, metal-oxide-semiconductor Q15 disconnects, motor 6 stops operating, make lithium battery 1 stop discharge, control, prevent that lithium battery 1 overdischarge phenomenon from taking place by the discharge voltage of 5 pairs of lithium batteries 1 of charge/discharge control circuit.
Claims (5)
1. a lithium battery two saves charge protectors; comprise intelligent management IC (8); the lithium battery that connects with charge circuit (1); it is characterized in that; also comprise the voltage detecting loop (2) that is used to detect lithium battery (1); this voltage detecting loop (2) connects with intelligent management IC (8), and the output of intelligent management IC (8) connects with metal-oxide-semiconductor Q2 on being connected in charge circuit by a control circuit (3).
2. lithium battery two joint charge protectors according to claim 1; it is characterized in that; described voltage detecting loop (2) is by triode Q9, Q10, Q11, Q12; divider resistance R36, R37, R38, R39 form, and by divider resistance R36, R37, R38, R39 dividing potential drop the voltage of detected lithium battery (1) are delivered to intelligent management IC (8).
3. lithium battery two joint charge protectors according to claim 1, it is characterized in that, the output of described control circuit (3) and intelligent management IC (8) resistance R 2, triode Q5, the resistance R 3 of coupled in series is successively formed, resistance R 2 connects with triode Q5 base stage, resistance R 3 connects with triode Q5 collector electrode, when the voltage that detects lithium battery (1) is higher than the set point of intelligent management IC (8), intelligent management IC (8) exports a low level, triode Q5 ends, triode Q2 disconnects, and stops charging; When the voltage that detects lithium battery (1) was lower than the set point of intelligent management IC (8), intelligent management IC (8) exported a high level, triode Q5 conducting, and triode Q2 conducting charges normal.
4. lithium battery according to claim 1 the two poles of the earth charge protector; it is characterized in that; also comprise another professional charge protection IC2, if it is out of control to detect the loop, charging can not normal turn-off; cell voltage rises to the second protection voltage set point; the second protection circuit that IC2 and peripheral element are formed can be exported a high level to Q3 by Q13, the Q3 conducting, and Q4 ends; Q1 turn-offs, and stops charging.
5. lithium battery two joint charge protectors according to claim 1, it is characterized in that, also comprise a charge/discharge control circuit (5), describedly be made up of triode Q7, Q14, metal-oxide-semiconductor Q15, during regular picture, intelligent management IC (8) exports a high level, triode Q7, Q14 conducting,, metal-oxide-semiconductor Q15 conducting, motor (6) rotates, regular picture; When lithium battery (1) voltage was lower than intelligent management IC (8) set point, intelligent management IC (8) exported a low level, and triode Q7, Q14 end,, metal-oxide-semiconductor Q15 disconnects, motor (6) stops operating, and makes lithium battery (1) stop discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200532489U CN201450316U (en) | 2009-03-24 | 2009-03-24 | Two-lithium-battery charging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200532489U CN201450316U (en) | 2009-03-24 | 2009-03-24 | Two-lithium-battery charging protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201450316U true CN201450316U (en) | 2010-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200532489U Expired - Lifetime CN201450316U (en) | 2009-03-24 | 2009-03-24 | Two-lithium-battery charging protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201450316U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946125A (en) * | 2012-11-01 | 2013-02-27 | 广东欧珀移动通信有限公司 | Method and system for weakening charging voltage overshooting |
-
2009
- 2009-03-24 CN CN2009200532489U patent/CN201450316U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946125A (en) * | 2012-11-01 | 2013-02-27 | 广东欧珀移动通信有限公司 | Method and system for weakening charging voltage overshooting |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100505 |