CN201528193U - Intelligent switch for battery protection - Google Patents
Intelligent switch for battery protection Download PDFInfo
- Publication number
- CN201528193U CN201528193U CN2009200443146U CN200920044314U CN201528193U CN 201528193 U CN201528193 U CN 201528193U CN 2009200443146 U CN2009200443146 U CN 2009200443146U CN 200920044314 U CN200920044314 U CN 200920044314U CN 201528193 U CN201528193 U CN 201528193U
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- CN
- China
- Prior art keywords
- main switch
- substrate
- drive circuit
- control circuit
- switch
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- 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 - Lifetime
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to an intelligent switch for battery protection, which has a main switch pipe, a main switch pipe substrate control circuit, a drive circuit and a drive circuit substrate control circuit, the main switch pipe has one isolated type MOSFET, the substrate of which can be freely switched, the main switch pipe can adopt minor area to implement minor conducting electric resistance and has high overpressure resistance; the main switch pipe substrate control circuit can determine the substrate bias of the main switch pipe by an internal detection circuit and a status control circuit; the main switch pipe can be controlled by the exterior control signal of the drive circuit performing the voltage conversion by the drive circuit; the drive circuit substrate control circuit can detect the minimum voltages of the intelligent switch and the drive circuit thereof for biasing the main switch pipe substrate bias and the substrate of the drive circuit. All modules of the utility model and the battery detection control circuit are all on the same one semiconductor substrate, which implements the actual integration, thereby reducing the fabricating cost.
Description
Technical field
The utility model relates to battery protecting apparatus and is used for the intelligent switch of battery protection.
Background technology
Present battery protecting apparatus as shown in Figure 1; mainly be to lean on the method for battery protection ic and external discharge switch M1, discharge switch M2 to realize; this device needs 1 battery protection controller; and 2 switch MOS FET and other 3 peripheral components R1, R2, C1; this device needs many peripheral components to waste the PCB area, and cost is also very high.The small part scheme is also arranged at present in order to reduce peripheral components quantity, with multicore sheet encapsulation technology controller and peripheral switch package are in the same place, but this scheme still uses two MOSFET as discharge and charge switch, does not reduce too many cost.
Summary of the invention
Propose a kind of intelligent switch, replace original discharge switch M1, discharge switch M2, make this intelligent switch on semi-conductive substrate, to realize with battery protection ic.Reduce the area and the cost of whole device like this, and obtained higher performance.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of intelligent switch that is used for battery protection, described intelligent switch has: main switch, main switch substrate control circuit, drive circuit and drive circuit substrate control circuit, described main switch has 1 isolated form MOSFET, and its substrate can freely switch; Described main switch substrate control circuit, it decides the substrate biasing of described main switch by inner testing circuit and state control circuit; Described drive circuit, its external control signal carry out voltage transitions by described drive circuit described main switch are controlled; Described drive circuit substrate control circuit detects the minimum voltage of described intelligent switch and drive circuit thereof, the substrate of be used to setover biasing of main switch substrate and drive circuit.
Further: described main switch is made of 1 NMOSFET or 1 PMOSFET, can realize turn-offing fully when battery charging and discharging is unusual, has very little conducting resistance during conducting.In addition, described main switch has more withstand voltage than higher, can guarantee not to be damaged when the charger reversal connection.
Further: described main switch substrate control circuit is that main switch is selected correct biasing according to the different conditions of battery.
Again further: operating state and control signal state that described drive circuit can be different according to described main switch, for the grid of described main switch provides driving voltage.
Further: described drive circuit substrate control circuit, it detects the low-pressure end of the voltage at described main switch two ends, and selecting its low-pressure end by switch is the substrate of NMOSFET all in biasing of described main switch substrate and the described drive circuit.
All modules described in the utility model all realize on semi-conductive substrate with battery detection control circuit, have realized truly integrated.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
The battery protecting apparatus that Fig. 1 is at present popular is implemented block diagram
The structured flowchart of Fig. 2 the utility model one embodiment
The circuit diagram of Fig. 3 drive circuit substrate control circuit
100 are used for the intelligent switch 101 drive circuit substrate control circuit of battery protection
102 main switch substrate control circuit, 103 main switches
104 drive circuit 110 batteries, 111 loads or chargers
112 battery detection control circuit
121 comparators, 122 booster circuits
Embodiment
Fig. 2 is the structured flowchart of an embodiment of the present utility model
At the intelligent switch that is used for battery protection 100 of present embodiment, main switch 103 constitutes the negative voltage side of source-drain electrode one termination battery 110, the sub-T3 of another termination negative voltage side by the N channel transistor (NMOSFET) of symmetry.In addition, main switch 103 grids connect drive circuit 104, and main switch 103 substrates connect main switch substrate control circuit 102.
Drive circuit substrate control circuit 101 detects the low-voltage end of battery negative pressure end T2 and negative voltage terminal T3, select the substrate of all NMOSFET of this low-pressure end voltage bias main switch substrate biasing circuit 102 and drive circuit 104 then, drive circuit 104 receives the overdischarge that comes from battery detection control circuit 112, overcharge, abnormality signals such as overcurrent, through the shutoff and the conducting of level conversion rear drive control main switch 103, main switch substrate control circuit 102 is according to the substrate of the control signal biasing main switch 103 of drive circuit 104 and battery detection control circuit 112.
The circuit diagram of one vitals of Fig. 3 the utility model one embodiment-drive circuit substrate control circuit
The diagram circuit constitutes drive circuit substrate control circuit 101.M3, M4, M5, M6 and R1, R2 constitute level shift circuit, are used for driving switch pipe M1 and M2.The voltage of negative voltage terminal T3 rises the back by booster circuit with the voltage platform and compares the output electrode control signal by comparator 121 with battery negative electrode voltage.This signal is exported to main switch substrate control circuit 102 and drive circuit 104 through the low-voltage among level shift circuit driving switch pipe M1 and M2 gating T2 and the T3.
Claims (5)
1. intelligent switch that is used for battery protection, have: main switch (103), main switch substrate control circuit (102), drive circuit (104) and drive circuit substrate control circuit (101), it is characterized in that: described main switch (103) has 1 isolated form MOSFET, and its substrate can freely switch; Described main switch substrate control circuit (102), it decides the substrate biasing of described main switch (103) by inner testing circuit and state control circuit; Described drive circuit (104), its external control signal carry out voltage transitions by described drive circuit described main switch (103) are controlled; Described drive circuit substrate control circuit (101) detects the minimum voltage of described intelligent switch and drive circuit thereof, the substrate of be used to setover main switch substrate biasing (102) and drive circuit (104).
2. according to the right 1 described intelligent switch that is used for battery protection; it is characterized in that: described main switch (103) is made of 1 NMOSFET or 1 PMOSFET; when battery charging and discharging is unusual, can realize turn-offing fully, have very little conducting resistance during conducting.
3. according to the intelligent switch of right 1 described battery protection, it is characterized in that: described main switch substrate control circuit (102) is that main switch is selected correct biasing according to the different conditions of battery.
4. according to the intelligent switch of right 1 described battery protection, it is characterized in that: operating state and control signal state that described drive circuit (104) can be different according to described main switch (103), for the grid of described main switch (103) provides driving voltage.
5. according to the intelligent switch of right 1 described battery protection; it is characterized in that: described drive circuit substrate control circuit (101); it detects the low-pressure end of the voltage at described main switch (103) two ends, and selecting its low-pressure end by switch is the substrate of NMOSFET all in described main switch substrate biasing (102) and the described drive circuit (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200443146U CN201528193U (en) | 2009-06-08 | 2009-06-08 | Intelligent switch for battery protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200443146U CN201528193U (en) | 2009-06-08 | 2009-06-08 | Intelligent switch for battery protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201528193U true CN201528193U (en) | 2010-07-14 |
Family
ID=42519475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200443146U Expired - Lifetime CN201528193U (en) | 2009-06-08 | 2009-06-08 | Intelligent switch for battery protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201528193U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588168B (en) * | 2009-06-08 | 2011-09-28 | 苏州赛芯电子科技有限公司 | Intelligent switch for battery protection |
| CN106067821A (en) * | 2016-07-20 | 2016-11-02 | 成都博思微科技有限公司 | The protection circuit of a kind of high-speed buffer and its implementation |
| WO2021136025A1 (en) * | 2019-12-30 | 2021-07-08 | 华为技术有限公司 | Charging protection circuit, charging circuit, and electronic device |
-
2009
- 2009-06-08 CN CN2009200443146U patent/CN201528193U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588168B (en) * | 2009-06-08 | 2011-09-28 | 苏州赛芯电子科技有限公司 | Intelligent switch for battery protection |
| CN106067821A (en) * | 2016-07-20 | 2016-11-02 | 成都博思微科技有限公司 | The protection circuit of a kind of high-speed buffer and its implementation |
| CN106067821B (en) * | 2016-07-20 | 2023-04-14 | 成都博思微科技有限公司 | Protection circuit of high-speed buffer and implementation method thereof |
| WO2021136025A1 (en) * | 2019-12-30 | 2021-07-08 | 华为技术有限公司 | Charging protection circuit, charging circuit, and electronic device |
| US12002801B2 (en) | 2019-12-30 | 2024-06-04 | Huawei Technologies Co., Ltd. | Charging protection circuit, charging circuit, and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100714 Effective date of abandoning: 20090608 |