CN203387167U - Battery protection circuit - Google Patents
Battery protection circuit Download PDFInfo
- Publication number
- CN203387167U CN203387167U CN201320413880.6U CN201320413880U CN203387167U CN 203387167 U CN203387167 U CN 203387167U CN 201320413880 U CN201320413880 U CN 201320413880U CN 203387167 U CN203387167 U CN 203387167U
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- pin
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- charge
- effect transistor
- field effect
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a battery protection circuit, and relates to a protection circuit. The first pin of a charging and discharging protection plate A is connected with one end of a first resistor R1. The other end of the first resistor R1 is connected with a battery positive electrode and an output end positive electrode. The second pin of the charging and discharging protection plate A is connected with one end of a second resistor R2 and one end of a first capacitor C1. The other end of the second resistor R2 is connected with the battery positive electrode. The third pin of the charging and discharging protection plate A is connected with the other end of the first capacitor C1, one end of a second capacitor C2 and one end of a third resistor R3 separately. The other end of the third resistor R3 is connected with the batter middle point. The fourth pin of the charging and discharging protection plate A is connected with the other end of the second capacitor C2 and a battery negative electrode separately. The battery negative electrode is connected with the positive electrode of a first diode D1 and the source of a first field effect transistor FET1. The gate of the first field effect transistor FET1 is connected with the fifth pin of the charging and discharging protection plate A. According to the utility model, advantages of simple structure, good protection effect, convenient utilization, safety, reliability and good practicability can be realized.
Description
Technical field
The utility model relates to a kind of protective circuit, be specifically related to a kind of battery protecting circuit.
Background technology
In recent years, the increasing product such as PDA, digital camera, mobile phone, Portable message equipment and Bluetooth device adopts lithium battery as main power source.Lithium battery has that volume is little, energy density is high, memory-less effect, cycle life are high, high-voltage battery and the advantage such as self-discharge rate is low, and not quite alike with NI-G, Ni-MH battery, fail safe when lithium battery must be considered charging, electric discharge, to prevent deterioration in characteristics.Very important for the overcharging of lithium battery, over-discharge can, overcurrent and short-circuit protection, thus usually all can be in power brick the design protection circuit in order to protect lithium battery.But current battery protecting circuit function is perfect not, the protection poor effect, brought some inconvenience to people's use.
The utility model content
For the deficiency existed on prior art, the utility model purpose is to be to provide a kind of battery protecting circuit, simple in structure, protects effective, easy to use, safe and reliable, practical.
To achieve these goals, the utility model is to realize by the following technical solutions: battery protecting circuit, comprise charge and discharge protecting plate A, the first resistance R 1-the 5th resistance R 5, the first capacitor C 1-capacitor C 3, first field effect transistor FET1-the second field effect transistor FET2, 1 pin of charge and discharge protecting plate A is connected with the first resistance R 1 one ends, the first resistance R 1 other end and anode, output head anode is connected, 2 pin of charge and discharge protecting plate A and the second resistance R 2 one ends, the first capacitor C 1 one ends are connected, second resistance R 2 other ends are connected with anode, 3 pin of charge and discharge protecting plate A respectively with first capacitor C 1 other end, the second capacitor C 2 one ends are connected with the 3rd resistance R 3 one ends, the 3rd resistance R 3 other ends are connected with the battery mid point, 4 pin of charge and discharge protecting plate A respectively with second capacitor C 2 other ends, battery cathode is connected, battery cathode and the first diode D1 positive pole, the source electrode of the first field effect transistor FET1 is connected, the first field effect transistor FET1 grid is connected with 5 pin of charge and discharge protecting plate A, the drain electrode of the first field effect transistor FET1 and the first diode D1 negative pole, the drain electrode of the second field effect transistor FET2 is connected with the second diode D2 negative pole, the source electrode of the second field effect transistor FET2 and the second diode D2 positive pole, the 4th resistance R 4 one ends, the 5th resistance R 5 one ends and negative pole of output end are connected, 6 pin of the source electrode of the second field effect transistor FET2 and charge and discharge protecting plate A, the 5th resistance R 5 other ends are connected, the 4th resistance R 4 other ends are connected with 7 pin of charge and discharge protecting plate A, 8 pin of charge and discharge protecting plate A are connected with capacitor C 3 one ends, capacitor C 3 other end ground connection.
According to above-mentioned battery protecting circuit, wherein, the 1-7 pin of described charge and discharge protecting plate A is respectively positive source, anode, battery mid point, battery cathode, discharge prevention end, charge protection end, power cathode.
The utility model is simple in structure, protects effective, easy to use, safe and reliable, practical.
The accompanying drawing explanation
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is structural representation of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
With reference to Fig. 1, this embodiment is by the following technical solutions: battery protecting circuit, comprise charge and discharge protecting plate A, the first resistance R 1-the 5th resistance R 5, the first capacitor C 1-capacitor C 3, first field effect transistor FET1-the second field effect transistor FET2, 1 pin of charge and discharge protecting plate A is connected with the first resistance R 1 one ends, the first resistance R 1 other end and anode, output head anode is connected, 2 pin of charge and discharge protecting plate A and the second resistance R 2 one ends, the first capacitor C 1 one ends are connected, second resistance R 2 other ends are connected with anode, 3 pin of charge and discharge protecting plate A respectively with first capacitor C 1 other end, the second capacitor C 2 one ends are connected with the 3rd resistance R 3 one ends, the 3rd resistance R 3 other ends are connected with the battery mid point, 4 pin of charge and discharge protecting plate A respectively with second capacitor C 2 other ends, battery cathode is connected, battery cathode and the first diode D1 positive pole, the source electrode of the first field effect transistor FET1 is connected, the first field effect transistor FET1 grid is connected with 5 pin of charge and discharge protecting plate A, the drain electrode of the first field effect transistor FET1 and the first diode D1 negative pole, the drain electrode of the second field effect transistor FET2 is connected with the second diode D2 negative pole, the source electrode of the second field effect transistor FET2 and the second diode D2 positive pole, the 4th resistance R 4 one ends, the 5th resistance R 5 one ends and negative pole of output end are connected, 6 pin of the source electrode of the second field effect transistor FET2 and charge and discharge protecting plate A, the 5th resistance R 5 other ends are connected, the 4th resistance R 4 other ends are connected with 7 pin of charge and discharge protecting plate A, 8 pin of charge and discharge protecting plate A are connected with capacitor C 3 one ends, capacitor C 3 other end ground connection.
1-7 pin that it should be noted that described charge and discharge protecting plate A is respectively positive source, anode, battery mid point, battery cathode, discharge prevention end, charge protection end, power cathode.
The charge and discharge protecting of this embodiment is mainly realized by the first field effect transistor FET1 and the second field effect transistor FET2; will be through one period time of delay when overcharging protection; then power fet 2 will be cut off to reach the purpose of protection; will recover always when lithium battery voltage drops to releasing point (lagging voltage overcharges), now can continue again to charge → protection → electric discharge → charging → discharge.The safety issue of this state can't obtain effective solution, lithium battery will repeat the action of charging → electric discharge → charging → electric discharge always, the grid of power MOSFET will be repeatedly in height alternating voltage state, may make the MOSFET heating like this, also can reduce battery life, so locking mode is very important.If lithium electric protection circuit has locking mode when protection of overcharging being detected, MOSFET will be not can heating, and fail safe improves a lot relatively.In like manner discharge prevention is realized by the first field effect transistor FET1.
This embodiment is simple in structure, protects effective, easy to use, safe and reliable, practical.
Above demonstration and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. battery protecting circuit, it is characterized in that, comprise charge and discharge protecting plate (A), the first resistance (R1)-the 5th resistance (R5), the first electric capacity (C1)-the 3rd electric capacity (C3), the first field effect transistor (FET1)-second field effect transistor (FET2), 1 pin of charge and discharge protecting plate (A) is connected with the first resistance (R1) end, the first resistance (R1) other end and anode, output head anode is connected, 2 pin of charge and discharge protecting plate (A) and the second resistance (R2) end, the first electric capacity (C1) end is connected, the second resistance (R2) other end is connected with anode, 3 pin of charge and discharge protecting plate (A) respectively with the first electric capacity (C1) other end, the second electric capacity (C2) end is connected with the 3rd resistance (R3) end, the 3rd resistance (R3) other end is connected with the battery mid point, 4 pin of charge and discharge protecting plate (A) respectively with the second electric capacity (C2) other end, battery cathode is connected, battery cathode and the first diode (D1) positive pole, the source electrode of the first field effect transistor (FET1) is connected, the first field effect transistor (FET1) grid is connected with 5 pin of charge and discharge protecting plate (A), the drain electrode of the first field effect transistor (FET1) and the first diode (D1) negative pole, the drain electrode of the second field effect transistor (FET2) is connected with the second diode (D2) negative pole, the source electrode of the second field effect transistor (FET2) and the second diode (D2) positive pole, the 4th resistance (R4) end, the 5th resistance (R5) end and negative pole of output end are connected, 6 pin of the source electrode of the second field effect transistor (FET2) and charge and discharge protecting plate (A), the 5th resistance (R5) other end is connected, the 4th resistance (R4) other end is connected with 7 pin of charge and discharge protecting plate (A), 8 pin of charge and discharge protecting plate (A) are connected with the 3rd electric capacity (C3) end, the 3rd electric capacity (C3) other end ground connection.
2. battery protecting circuit according to claim 1, is characterized in that, the 1-7 pin of described charge and discharge protecting plate (A) is respectively positive source, anode, battery mid point, battery cathode, discharge prevention end, charge protection end, power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320413880.6U CN203387167U (en) | 2013-07-12 | 2013-07-12 | Battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320413880.6U CN203387167U (en) | 2013-07-12 | 2013-07-12 | Battery protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203387167U true CN203387167U (en) | 2014-01-08 |
Family
ID=49875617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320413880.6U Expired - Fee Related CN203387167U (en) | 2013-07-12 | 2013-07-12 | Battery protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203387167U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836272A (en) * | 2015-03-05 | 2015-08-12 | 南宁市鼎天机械制造有限公司 | Electric power storage system |
| CN105375444A (en) * | 2015-10-28 | 2016-03-02 | 邹小辉 | Lithium battery protection 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 |
-
2013
- 2013-07-12 CN CN201320413880.6U patent/CN203387167U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836272A (en) * | 2015-03-05 | 2015-08-12 | 南宁市鼎天机械制造有限公司 | Electric power storage system |
| CN105375444A (en) * | 2015-10-28 | 2016-03-02 | 邹小辉 | Lithium battery protection 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Protecting circuit for single lithium ion cell Effective date of registration: 20141208 Granted publication date: 20140108 Pledgee: Tianjin Binhai hi tech Industrial Development Zone Kexin Venture Capital Co., Ltd. Pledgor: Tianjin Fengwen Science and Technology Development Co., Ltd. Registration number: 2014120000064 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150703 Granted publication date: 20140108 Pledgee: Tianjin Binhai hi tech Industrial Development Zone Kexin Venture Capital Co., Ltd. Pledgor: Tianjin Fengwen Science and Technology Development Co., Ltd. Registration number: 2014120000064 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20150712 |
|
| EXPY | Termination of patent right or utility model |