CN205051402U - Lithium batteries control circuit - Google Patents
Lithium batteries control circuit Download PDFInfo
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- CN205051402U CN205051402U CN201520858600.1U CN201520858600U CN205051402U CN 205051402 U CN205051402 U CN 205051402U CN 201520858600 U CN201520858600 U CN 201520858600U CN 205051402 U CN205051402 U CN 205051402U
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Abstract
The utility model discloses a lithium batteries control circuit, including three terminal regulator U1, controllable accurate steady voltage source VS, MOS pipe Q2, resistance R1, resistance R2, diode D and triode Q1, three terminal regulator U1 input connect respectively VCC and resistance R2, three terminal regulator U1 output connecting resistance R1, it is anodal that diode D is interceptd respectively to the resistance R1 other end, anodal and the resistance R3 of emitting diode LED, three terminal regulator U1 earthing terminal and resistance R9 are connected respectively to the resistance R3 other end, resistance R9 other end difference connecting resistance R8 and controllable accurate steady voltage source VS's the A utmost point, controllable accurate steady voltage source VS's K extremely distinguishes connecting resistance R5, MOS pipe Q1's the D utmost point and resistance R7 and ground connection, controllable accurate steady voltage source VS's the R utmost point and resistance R4 are connected respectively to the resistance R5 other end. The utility model discloses lithium batteries control circuit, circuit structure is simple, and is with low costs, small, can change the security height that charges, especially adapted using widely between constant current charging and constant voltage charge automatically.
Description
Technical field
The utility model relates to a kind of charging control circuit, specifically a kind of lithium cell charging control circuit.
Background technology
Lithium battery as a kind of can the power store of Reusability; application widely; but the useful life of lithium battery and it whether often to overcharge relation very large; frequent overcharge; meeting high degree shortens the life-span of lithium battery, more existing lithium battery charging circuit complex structures, and cost is high; and there is function singleness, there is no charge protection etc. shortcoming.
Utility model content
The purpose of this utility model is to provide a kind of lithium cell charging control circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of lithium cell charging control circuit, comprise three terminal regulator U1, controllable accurate source of stable pressure VS, metal-oxide-semiconductor Q2, resistance R1, resistance R2, diode D and triode Q1, described three terminal regulator U1 input connects power supply VCC and resistance R2 respectively, three terminal regulator U1 output contact resistance R1, the resistance R1 other end tackles diode D positive pole respectively, LED positive pole and resistance R3, the resistance R3 other end connects three terminal regulator U1 earth terminal and resistance R9 respectively, the A pole of resistance R9 other end difference contact resistance R8 and controllable accurate source of stable pressure VS, the K pole contact resistance R5 respectively of controllable accurate source of stable pressure VS, the D pole of metal-oxide-semiconductor Q1 and resistance R7 ground connection, the resistance R5 other end connects R pole and the resistance R4 of controllable accurate source of stable pressure VS respectively, resistance R4 other end connecting triode Q1 emitter, the triode Q1 base stage contact resistance R2 other end, triode Q1 collector electrode connects diode D negative pole respectively, lithium battery E positive pole and triode Q3 emitter, the G pole of the triode Q3 collector electrode difference contact resistance R7 other end and metal-oxide-semiconductor Q2, the S pole of metal-oxide-semiconductor Q2 connects lithium battery E negative pole and resistance R6 respectively, resistance R6 other end connecting triode Q3 base stage.
As further program of the utility model: described three terminal regulator U1 adopts LM317.
As the utility model further scheme: described controllable accurate source of stable pressure VS adopts TL431.
Compared with prior art, the beneficial effects of the utility model are: the utility model lithium cell charging control circuit, and circuit structure is simple, and cost is low, and volume is little, and can automatically change between constant current charge and constant voltage charge, charging security is high, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of lithium cell charging control circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of lithium cell charging control circuit, comprise three terminal regulator U1, controllable accurate source of stable pressure VS, metal-oxide-semiconductor Q2, resistance R1, resistance R2, diode D and triode Q1, described three terminal regulator U1 input connects power supply VCC and resistance R2 respectively, three terminal regulator U1 output contact resistance R1, the resistance R1 other end tackles diode D positive pole respectively, LED positive pole and resistance R3, the resistance R3 other end connects three terminal regulator U1 earth terminal and resistance R9 respectively, the A pole of resistance R9 other end difference contact resistance R8 and controllable accurate source of stable pressure VS, the K pole contact resistance R5 respectively of controllable accurate source of stable pressure VS, the D pole of metal-oxide-semiconductor Q1 and resistance R7 ground connection, the resistance R5 other end connects R pole and the resistance R4 of controllable accurate source of stable pressure VS respectively, resistance R4 other end connecting triode Q1 emitter, the triode Q1 base stage contact resistance R2 other end, triode Q1 collector electrode connects diode D negative pole respectively, lithium battery E positive pole and triode Q3 emitter, the G pole of the triode Q3 collector electrode difference contact resistance R7 other end and metal-oxide-semiconductor Q2, the S pole of metal-oxide-semiconductor Q2 connects lithium battery E negative pole and resistance R6 respectively, resistance R6 other end connecting triode Q3 base stage.
Three terminal regulator U1 adopts LM317.
Controllable accurate source of stable pressure VS adopts TL431.
Operation principle of the present utility model is: refer to Fig. 1, when starting to charge, because LM317 output voltage is lower, therefore after R4 and R5 dividing potential drop less than 2.5V, TL431 ends, and can think that R8 and R9 does not exist, and now forms constant-current circuit by LM317 and R1, namely the voltage of R1 is 1.23V is constant, R3 voltage can be ignored, and diode D provides positive charge current path, although there is pressure drop, but owing to being before voltage sample, therefore do not affect the accurate sampling of voltage at all.
After connecting the lithium battery E with certain voltage, Q3 conducting, therefore Q2 also conducting, its pressure drop can be ignored.
When lithium battery E is charged to a greater part of, lithium battery E voltage reaches 8.3V, reaches 2.5V after R4, R5 dividing potential drop, then TL4321 starts conducting, and R3 starts to have electric current to pass through and have pressure drop, thus the electric current flowing through R1 reduces, therefore LM317 exits constant current state, and whole circuit transfers constant voltage circuit to.
The effect of R9 is generation pressure drop after electric current flows through, and making LED luminous on the one hand, making lithium battery E not luminous when not being full of on the other hand, and the effect of R8 is the electric current of restriction LED.
When charging current reduces to 1/3 initial value, LED just starts conducting luminescence, charging current reduce to close to 0 time luminescence the brightest, instruction is full of.
When occurring abnormal,
If 1 has a power failure or power-off, then Q1 cut-off, the collector junction of diode D and Q1 ensures that lithium battery E can not discharge, and when charging normal, R2 provides electric current to Q1, therefore Q1 short circuit.
If 2 cell voltages exceed rated voltage (such as having connect individual 14.4V battery), same D can ensure not flow backwards, and has a little electric discharge by means of only Q1.
If 3 batteries connect instead, then Q2 will disconnect, and guarantee do not have reverse current.The electric current flowing through resistance R6 only has several microamperes can ignore.
If 4 short circuits, then Q3 cut-off, Q2 is therefore and by, no current.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a lithium cell charging control circuit, comprise three terminal regulator U1, controllable accurate source of stable pressure VS, metal-oxide-semiconductor Q2, resistance R1, resistance R2, diode D and triode Q1, it is characterized in that, described three terminal regulator U1 input connects power supply VCC and resistance R2 respectively, three terminal regulator U1 output contact resistance R1, the resistance R1 other end tackles diode D positive pole respectively, LED positive pole and resistance R3, the resistance R3 other end connects three terminal regulator U1 earth terminal and resistance R9 respectively, the A pole of resistance R9 other end difference contact resistance R8 and controllable accurate source of stable pressure VS, the K pole contact resistance R5 respectively of controllable accurate source of stable pressure VS, the D pole of metal-oxide-semiconductor Q1 and resistance R7 ground connection, the resistance R5 other end connects R pole and the resistance R4 of controllable accurate source of stable pressure VS respectively, resistance R4 other end connecting triode Q1 emitter, the triode Q1 base stage contact resistance R2 other end, triode Q1 collector electrode connects diode D negative pole respectively, lithium battery E positive pole and triode Q3 emitter, the G pole of the triode Q3 collector electrode difference contact resistance R7 other end and metal-oxide-semiconductor Q2, the S pole of metal-oxide-semiconductor Q2 connects lithium battery E negative pole and resistance R6 respectively, resistance R6 other end connecting triode Q3 base stage.
2. lithium cell charging control circuit according to claim 1, is characterized in that, described three terminal regulator U1 adopts LM317.
3. lithium cell charging control circuit according to claim 1, is characterized in that, described controllable accurate source of stable pressure VS adopts TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520858600.1U CN205051402U (en) | 2015-10-28 | 2015-10-28 | Lithium batteries control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520858600.1U CN205051402U (en) | 2015-10-28 | 2015-10-28 | Lithium batteries control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205051402U true CN205051402U (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520858600.1U Expired - Fee Related CN205051402U (en) | 2015-10-28 | 2015-10-28 | Lithium batteries control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205051402U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375563A (en) * | 2015-10-28 | 2016-03-02 | 邹小辉 | Lithium battery charging control circuit |
| CN106026300A (en) * | 2016-07-26 | 2016-10-12 | 深圳市极客宝贝智能科技有限公司 | Control circuit with compatibility of battery charging protection, channel switching and linear power supply management |
| CN111781506A (en) * | 2020-05-26 | 2020-10-16 | 上海空间电源研究所 | High-precision adjustable lithium battery cell voltage control circuit |
-
2015
- 2015-10-28 CN CN201520858600.1U patent/CN205051402U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375563A (en) * | 2015-10-28 | 2016-03-02 | 邹小辉 | Lithium battery charging control circuit |
| CN105375563B (en) * | 2015-10-28 | 2017-08-25 | 江西省灿辉新能源科技有限公司 | A kind of lithium cell charging controls circuit |
| CN106026300A (en) * | 2016-07-26 | 2016-10-12 | 深圳市极客宝贝智能科技有限公司 | Control circuit with compatibility of battery charging protection, channel switching and linear power supply management |
| CN111781506A (en) * | 2020-05-26 | 2020-10-16 | 上海空间电源研究所 | High-precision adjustable lithium battery cell voltage control circuit |
| CN111781506B (en) * | 2020-05-26 | 2023-02-03 | 上海空间电源研究所 | High-precision adjustable lithium battery cell voltage control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160620 Address after: 518000 Guangdong province Shenzhen city Longhua District Guanlan Fumin Qiankeng village Fumin road building A No. 98 Patentee after: Shenzhen Hong Hao Sheng Electronics Co., Ltd. Address before: 516000 Baiyun Road, Huiyang District, Huiyang District, Huizhou City, Guangdong province two Patentee before: Zou Xiaohui |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20171028 |