CN201754501U - Reverse-charge prevention circuit of lithium battery protecting circuit - Google Patents
Reverse-charge prevention circuit of lithium battery protecting circuit Download PDFInfo
- Publication number
- CN201754501U CN201754501U CN2010202763090U CN201020276309U CN201754501U CN 201754501 U CN201754501 U CN 201754501U CN 2010202763090 U CN2010202763090 U CN 2010202763090U CN 201020276309 U CN201020276309 U CN 201020276309U CN 201754501 U CN201754501 U CN 201754501U
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- control end
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- lithium battery
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Abstract
The utility model discloses a reverse-charge prevention circuit of a lithium battery protecting circuit, which comprises a control end (CTL1), a control end (CTL2), a control end (CTL3), N channels MOSFET (Q1), a voltage regulator tube (Z1), a diode (D1) and a resistor (R1). Source electrodes of the N channels MOSFET (Q1) are connected with the control end (CTL1); drain electrodes of the N channels MOSFET (Q1) are connected with the control end (CTL2); grid electrodes of the N channels MOSFET (Q1) are connected with a positive end of the voltage regulator tube (Z1); a negative end of the voltage regulator tube (Z1) is connected with a negative end of the diode (D1); a positive end of the diode (D1) is connected with the control end (CTL1); one end of the resistor (R1) is connected with the grid electrodes of the N channels MOSFET (Q1); and the other end of the resistor (R1) is connected with the control end (CTL3). The reverse-charge prevention circuit has the advantages of simple and convenient design, small occupied space, low cost and no influence on a battery protecting system.
Description
Technical field
The utility model relates to battery charge discharge technology field, especially relates to a kind of anti-reverse charging circuit that N-channel MOS FET cuts off anode type lithium battery protection circuit that is used for.
Background technology
Lithium ion battery generally all is equipped with protective circuit in use, overcharges for lithium battery provides, defencive function such as overdischarge, overcurrent.Also having a kind of common problem in the use of lithium battery, is exactly the charger reversal connection, may cause battery electric quantity to be used up, even may heavy-current discharge occur and cause that protective circuit damages.Therefore, in protective circuit, should possess the function of the reverse charging of preventing, use to guarantee cell safety.At present, generally take following mode: 1. anti-reverse joint is adopted in the interface section; 2. use single-chip microcomputer to detect control.First kind of mode is that the structural design that relies on guarantees, goes wrong on structure, then protects complete failure; The second way needs complicated detection and programming, and design cost height, production process are many, are unfavorable for commercialization.
The utility model content
In view of this; the purpose of this utility model is to overcome the defective of prior art, and a kind of anti-reverse charging circuit of lithium battery protection circuit is provided, and improves the lithium battery safety in utilization; and design easy, take up room little, cost is low, battery protection system is not had influence.
For achieving the above object; the utility model is by the following technical solutions: the anti-reverse charging circuit of lithium battery protection circuit of the present utility model comprises control end (CTL1); control end (CTL2); control end (CTL3); N-channel MOS FET(Q1); voltage-stabiliser tube (Z1); diode (D1) and resistance (R1); wherein; N-channel MOS FET(Q1) source electrode links to each other with control end (CTL1); drain electrode links to each other with control end (CTL2); grid links to each other with voltage-stabiliser tube (Z1) anode; voltage-stabiliser tube (Z1) negative terminal links to each other with diode (D1) negative terminal; diode (D1) anode links to each other with control end (CTL1); resistance (R1) end and N-channel MOS FET(Q1) grid links to each other, and the other end links to each other with control end (CTL3).
The beneficial effects of the utility model are: when the utility model circuit oppositely is connected to battery protecting circuit two power ends at charger, can cut off reverse charging; That the utility model takes up room is little, cost is low, design is easy, is applicable to that conveniently N-channel MOS FET cuts off anode type lithium battery protection circuit, and battery protection system is not had influence.Have following beneficial effect: the utility model simplicity of design, be convenient in product design, use.The utility model does not increase assembling parts, convenient production.It is driven that the utility model adopts enhancement mode MOSFET, does not also increase the original system power consumption during work substantially.The utility model adopts device to be the switching controls device, specific (special) requirements such as no high-power, high pressure, and cost is low.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by specifically noted structure in following specification and the accompanying drawing.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1; the anti-reverse charging circuit of lithium battery protection circuit of the present utility model comprises control end CTL1, control end CTL2, control end CTL3, N channel field-effect pipe Q1, voltage-stabiliser tube Z1, diode D1 and resistance R 1; wherein; N channel field-effect pipe Q1 source electrode links to each other with control end CTL1; drain electrode links to each other with control end CTL2; grid links to each other with voltage-stabiliser tube Z1 anode; voltage-stabiliser tube Z1 negative terminal links to each other with diode D1 negative terminal; diode D1 anode links to each other with control end CTL1; resistance R 1 one ends link to each other with N channel field-effect pipe Q1 grid, and the other end links to each other with control end CTL3.During enforcement; above-mentioned anti-reverse charging circuit is connected to N-channel MOS FET to cut off in the anode type lithium battery protection circuit; being specially connected mode is; control end CTL1 is connected with the anode of lithium battery protection circuit; control end CTL2 is connected with the anode discharge control N-channel MOS FET grid of lithium battery protection circuit, and control end CTL3 is connected with the lithium battery protection circuit negative terminal.When system's operate as normal, if there is charger oppositely to insert the lithium battery protection circuit positive and negative terminal, moment makes N channel field-effect pipe Q1 conducting at grid and positive voltage of source electrode generation of the N of anti-reverse charging circuit channel field-effect pipe Q1; It is 0V that the conducting of N channel field-effect pipe Q1 then makes the discharge control N-channel MOS FET grid of lithium battery protection circuit and the voltage between the source electrode; thereby the discharge control N-channel MOS FET of lithium battery protection circuit is closed; block the reverse charging electric current, play the effect of protection battery and protective circuit.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, other modifications that those of ordinary skills make the technical solution of the utility model or be equal to replacement, only otherwise break away from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of the claim scope of the present utility model.
Claims (1)
1. the anti-reverse charging circuit of a lithium battery protection circuit; it is characterized in that: this anti-reverse charging circuit comprises control end (CTL1); control end (CTL2); control end (CTL3); N-channel MOS FET(Q1); voltage-stabiliser tube (Z1); diode (D1) and resistance (R1); wherein; N-channel MOS FET(Q1) source electrode links to each other with control end (CTL1); drain electrode links to each other with control end (CTL2); grid links to each other with voltage-stabiliser tube (Z1) anode; voltage-stabiliser tube (Z1) negative terminal links to each other with diode (D1) negative terminal; diode (D1) anode links to each other with control end (CTL1); resistance (R1) end and N-channel MOS FET(Q1) grid links to each other, and the other end links to each other with control end (CTL3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202763090U CN201754501U (en) | 2010-07-30 | 2010-07-30 | Reverse-charge prevention circuit of lithium battery protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202763090U CN201754501U (en) | 2010-07-30 | 2010-07-30 | Reverse-charge prevention circuit of lithium battery protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201754501U true CN201754501U (en) | 2011-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202763090U Expired - Lifetime CN201754501U (en) | 2010-07-30 | 2010-07-30 | Reverse-charge prevention circuit of lithium battery protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201754501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390883A (en) * | 2013-06-28 | 2013-11-13 | 惠州市蓝微电子有限公司 | Lithium battery charging protection circuit |
-
2010
- 2010-07-30 CN CN2010202763090U patent/CN201754501U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390883A (en) * | 2013-06-28 | 2013-11-13 | 惠州市蓝微电子有限公司 | Lithium battery charging protection circuit |
| WO2014205974A1 (en) * | 2013-06-28 | 2014-12-31 | 惠州市蓝微电子有限公司 | Charging protection circuit for lithium battery |
| CN103390883B (en) * | 2013-06-28 | 2016-03-02 | 惠州市蓝微电子有限公司 | A kind of charging protective circuit of lithium cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110302 |
|
| CX01 | Expiry of patent term |