CN203103929U - Protection circuit for lithium battery - Google Patents
Protection circuit for lithium battery Download PDFInfo
- Publication number
- CN203103929U CN203103929U CN 201220721980 CN201220721980U CN203103929U CN 203103929 U CN203103929 U CN 203103929U CN 201220721980 CN201220721980 CN 201220721980 CN 201220721980 U CN201220721980 U CN 201220721980U CN 203103929 U CN203103929 U CN 203103929U
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- electrically connected
- electric core
- protection chip
- battery electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a protection circuit for a lithium battery, which solves the problems that the life of the existing lithium battery is easy to sharply shorten due to over-voltage, over-discharge and over-current during a use process. The protection circuit for the lithium battery comprises a lithium battery protection chip, a PMOS (P-channel metal oxide semiconductor) tube Q1, a PMOS tube Q2, a charger and two lithium battery cell interfaces, wherein the negative electrode of the first lithium battery cell interface is electrically connected with the positive electrode of the second lithium battery cell interface; the positive electrode of the first lithium battery cell interface is electrically connected with the positive electrode of the charger, and electrically connected with the power interface of the lithium battery protection chip via a resistor R1; the grid electrode of the PMOS tube Q1 and the grid electrode of the PMOS tube Q2 are electrically connected with the lithium battery protection chip respectively; and the source electrode of the PMOS tube Q1 is electrically connected with the negative electrode of the charger, and the source electrode of the PMOS tube Q2 is electrically connected with the negative electrode of the second lithium battery cell interface.
Description
Technical field
The utility model relates to battery protecting circuit, particularly lithium battery protection circuit.
Background technology
Existing lithium cell charging and power supply circuits are comparatively simple and easy, lack protective device, in use be easy to produce the lithium battery overvoltage, cross put, problem such as overcurrent, make the life-span of lithium battery sharply shorten, when serious even damage relevant power consumption equipment.
The utility model content
The utility model proposes lithium battery protection circuit and solve existing lithium battery in use easily because of overvoltage, mistake are put, overcurrent causes problems such as rapid shortening of lithium battery life-span.
The technical solution of the utility model is achieved in that
Lithium battery protection circuit comprises li-ion cell protection chip, PMOS pipe Q1, PMOS pipe Q2, charger and two lithium battery electric core interfaces; The negative pole of first lithium battery electric core interface is connected with the positive electrical of second lithium battery electric core interface; The positive pole of described first lithium battery electric core interface is connected with the positive electrical of described charger, and the positive pole of described first lithium battery electric core interface is electrically connected with the power interface of described li-ion cell protection chip by a resistance R 1; The grid of the grid of described PMOS pipe Q1 and described PMOS pipe Q2 is electrically connected with described li-ion cell protection chip respectively; The source electrode of described PMOS pipe Q1 is connected with the negative electricity of described charger, and the source electrode of described PMOS pipe Q2 is connected with the negative electricity of described second lithium battery electric core interface.
Described li-ion cell protection chip is a R5460N binodal li-ion cell protection chip; The overdischarge of described R5460N binodal li-ion cell protection chip detects output pin and is electrically connected with the grid of described PMOS pipe Q2; The detection output pin that overcharges of described R5460N binodal li-ion cell protection chip is electrically connected with the grid of described PMOS pipe Q1; The center voltage input port (VC) of described R5460N binodal li-ion cell protection chip is electrically connected on the negative pole of described first lithium battery electric core interface and the positive pole of described second lithium battery electric core interface by a resistance R 2; Described center voltage input port (VC) is connected to the negative pole of described second lithium battery electric core interface by a capacitor C 2; The negative input port (V-) of the charger of described R5460N binodal li-ion cell protection chip is connected to the negative pole of described second lithium battery electric core interface by a capacitor C 1.
Compare with prior art to description of the present utility model as can be known by above-mentioned, the utlity model has following advantage:
The utility model circuit structure is simple, and cost is low, can effectively protect lithium battery, prolongs the useful life of lithium battery.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a circuit theory schematic diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
With reference to Fig. 1, lithium battery protection circuit comprises li-ion cell protection chip U1, PMOS pipe Q1, PMOS pipe Q2, charger 3 and two lithium battery electric core interfaces 1,2; The negative pole 12 of first lithium battery electric core interface 1 is electrically connected with the positive pole 21 of second lithium battery electric core interface 2; The positive pole 11 of described first lithium battery electric core interface 1 is electrically connected with the positive pole 31 of described charger 3, and the positive pole 11 of described first lithium battery electric core interface 11 is electrically connected with the power interface Vdd of described li-ion cell protection chip U1 by a resistance R 1; The grid G 2 of the grid G 1 of described PMOS pipe Q1 and described PMOS pipe Q2 is electrically connected with described li-ion cell protection chip U1 respectively; The source S 1 of described PMOS pipe Q1 is electrically connected with the negative pole 32 of described charger 3, and the source S 2 of described PMOS pipe Q2 is electrically connected with the negative pole 22 of described second lithium battery electric core interface 2.
Described li-ion cell protection chip U1 is a R5460N binodal li-ion cell protection chip; The overdischarge of described R5460N binodal li-ion cell protection chip U1 detects output pin Dout and is electrically connected with the grid G 2 of described PMOS pipe Q2; The detection output pin Cout that overcharges of described R5460N binodal li-ion cell protection chip U1 is electrically connected with the grid G 1 of described PMOS pipe Q1; The center voltage input port VC of described R5460N binodal li-ion cell protection chip U1 is electrically connected on the negative pole 12 of described first lithium battery electric core interface 1 and the positive pole 11 of described second lithium battery electric core interface 2 by a resistance R 2; Described center voltage input port VC is connected to the negative pole 22 of described second lithium battery electric core interface 2 by a capacitor C 2; The negative input port V-of the charger of described R5460N binodal li-ion cell protection chip U1 is connected to the negative pole 22 of described second lithium battery electric core interface 2 by a capacitor C 1.The earth electrode VSS of described R5460N binodal li-ion cell protection chip U1 is connected with the negative pole 22 of described second lithium battery electric core interface 2; Described resistance R 1 and described resistance R 2 are 330 Ω resistance.Described capacitor C 1 is a 0.01u electric capacity, and described capacitor C 2 is a 0.1u electric capacity.The over-charge protective voltage 4.35V of R5460N binodal li-ion cell protection chip overcharges from recovery voltage 4.15V, and over-discharge protection circuit 2.3V crosses to be put from recovery voltage 3.0V.Overcharge and detect the conducting and the ring of output pin and overdischarge detection output pin output square wave control PMOS pipe, the charging and the discharge of control lithium battery.
Compare with prior art, the utlity model has following advantage:
The utility model circuit structure is simple, and cost is low, can effectively protect lithium battery, prolongs the useful life of lithium battery.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (2)
1. lithium battery protection circuit is characterized in that: comprise li-ion cell protection chip, PMOS pipe Q1, PMOS pipe Q2, charger and two lithium battery electric core interfaces;
The negative pole of first lithium battery electric core interface is connected with the positive electrical of second lithium battery electric core interface;
The positive pole of described first lithium battery electric core interface is connected with the positive electrical of described charger, and the positive pole of described first lithium battery electric core interface is electrically connected with the power interface of described li-ion cell protection chip by a resistance R 1;
The grid of the grid of described PMOS pipe Q1 and described PMOS pipe Q2 is electrically connected with described li-ion cell protection chip respectively;
The source electrode of described PMOS pipe Q1 is connected with the negative electricity of described charger, and the source electrode of described PMOS pipe Q2 is connected with the negative electricity of described second lithium battery electric core interface.
2. lithium battery protection circuit as claimed in claim 1 is characterized in that: described li-ion cell protection chip is a R5460N binodal li-ion cell protection chip;
The overdischarge of described R5460N binodal li-ion cell protection chip detects output pin and is electrically connected with the grid of described PMOS pipe Q2;
The detection output pin that overcharges of described R5460N binodal li-ion cell protection chip is electrically connected with the grid of described PMOS pipe Q1;
The center voltage input port (VC) of described R5460N binodal li-ion cell protection chip is electrically connected on the negative pole of described first lithium battery electric core interface and the positive pole of described second lithium battery electric core interface by a resistance R 2; Described center voltage input port (VC) is connected to the negative pole of described second lithium battery electric core interface by a capacitor C 2;
The negative input port (V-) of the charger of described R5460N binodal li-ion cell protection chip is connected to the negative pole of described second lithium battery electric core interface by a capacitor C 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220721980 CN203103929U (en) | 2012-12-24 | 2012-12-24 | Protection circuit for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220721980 CN203103929U (en) | 2012-12-24 | 2012-12-24 | Protection circuit for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203103929U true CN203103929U (en) | 2013-07-31 |
Family
ID=48855306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220721980 Expired - Fee Related CN203103929U (en) | 2012-12-24 | 2012-12-24 | Protection circuit for lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203103929U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319840A (en) * | 2014-10-27 | 2015-01-28 | 深圳市新国都技术股份有限公司 | Charging equalization circuit applied to lithium batteries |
| CN106325564A (en) * | 2016-08-24 | 2017-01-11 | 柳州鹏达科技有限责任公司 | Mouse lithium battery power supply circuit |
| WO2019029069A1 (en) * | 2017-08-10 | 2019-02-14 | 常州市派腾电子技术服务有限公司 | Battery protection chip, power supply device, and electronic cigarette |
-
2012
- 2012-12-24 CN CN 201220721980 patent/CN203103929U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319840A (en) * | 2014-10-27 | 2015-01-28 | 深圳市新国都技术股份有限公司 | Charging equalization circuit applied to lithium batteries |
| CN106325564A (en) * | 2016-08-24 | 2017-01-11 | 柳州鹏达科技有限责任公司 | Mouse lithium battery power supply circuit |
| WO2019029069A1 (en) * | 2017-08-10 | 2019-02-14 | 常州市派腾电子技术服务有限公司 | Battery protection chip, power supply device, and electronic cigarette |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203086213U (en) | Rapid charger and mobile power supply with the charger | |
| CN203135543U (en) | Cell phone adapter | |
| CN103178595A (en) | Mobile phone adapter | |
| CN202014087U (en) | Lithium battery charging protection circuit for portable system | |
| CN204144974U (en) | The protection of lithium battery and inversion system | |
| CN103746446A (en) | Ceaseless power-supplying circuit and electronic product | |
| CN203103929U (en) | Protection circuit for lithium battery | |
| CN105470925A (en) | Secondary battery protection circuit and battery device | |
| CN102231516B (en) | Battery protection board, power battery and power battery pack | |
| CN201541135U (en) | Uninterruptible power supply | |
| CN204290423U (en) | Lithium battery charging circuit | |
| CN204794046U (en) | Polymer battery protection shield circuit | |
| CN201298735Y (en) | Lithium-ion battery protection device and an application device thereof | |
| CN203387167U (en) | Battery protection circuit | |
| CN2938522Y (en) | Overload protection circuit of power lithium ion battery | |
| CN202405764U (en) | Over-current protective system for parallel battery packs | |
| CN201562728U (en) | Switch type protective circuit for lithium batteries | |
| CN204103480U (en) | A kind of charger reversal connection and short-circuit protection circuit | |
| CN204216613U (en) | A kind of portable power source | |
| CN203352147U (en) | Lithium ion battery protection circuit | |
| CN202150694U (en) | Battery protective board, power battery, and power battery pack | |
| CN102832674B (en) | Charging/discharging protection circuit of lithium battery | |
| CN202797906U (en) | Battery overcharge protection system | |
| CN203761120U (en) | Uninterrupted power supply circuit and electronic product | |
| CN202093153U (en) | Over-voltage detection and alarm circuit for rechargeable battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20151224 |
|
| EXPY | Termination of patent right or utility model |