CN107681637A - Battery protection integrated circuit - Google Patents
Battery protection integrated circuit Download PDFInfo
- Publication number
- CN107681637A CN107681637A CN201610615637.0A CN201610615637A CN107681637A CN 107681637 A CN107681637 A CN 107681637A CN 201610615637 A CN201610615637 A CN 201610615637A CN 107681637 A CN107681637 A CN 107681637A
- Authority
- CN
- China
- Prior art keywords
- circuit
- switch tube
- type switch
- integrated circuit
- battery protection
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
Abstract
The invention discloses a kind of battery protection integrated circuit, wherein, including：The drain electrode of one N type switch tube is connected with the negative pole of a battery core, and another source electrode of the N type switch tube is negative terminal；The grid of the N type switch tube is connected with a gate drive circuit, and the gate drive circuit is connected with a charge protector, a discharge protection circuit, a charger detection circuit.The present invention is using the normal protection that battery is realized in N type switch tube connection gate drive circuit, charge protector, discharge protection circuit, charger detection circuit; and; it is small using technical scheme PCB surface product, and also declined compared to prior art, cost.
Description
Technical field
The present invention relates to a kind of battery protecting circuit, more particularly to a kind of battery protection integrated circuit.
Background technology
Battery protecting circuit be to avoid battery because of overcharge, overdischarge, electric current is excessive causes shorter battery life or electricity
A kind of circuit that pond is damaged and designed.
Fig. 1 is the circuit diagram of battery protecting circuit in the prior art, refers to Fig. 1, and existing battery protecting circuit is main
Battery protection function is realized by battery protection control integrated circuit control discharge switch pipe M1 and charge switch pipe M2.Work as battery
During normal work, M1 and M2 are both turned on.When there is exception-triggered protection using integrated circuit in battery discharge, M1 shut-offs.When battery fills
When there is exception-triggered protection using integrated circuit in electricity, M2 shut-offs.Existing device peripheral components are more, cause production process more, PCB surface product
Greatly, cost is high.
The content of the invention
The invention discloses a kind of battery protection integrated circuit, to solve battery protection integrated circuit life in the prior art
Produce the problem of process is more, PCB surface product is big and cost is higher.
The above-mentioned purpose of the present invention is achieved through the following technical solutions：
A kind of battery protection integrated circuit, wherein, including：The drain electrode of one N type switch tube is connected with the negative pole of a battery core, the N
Another source electrode of type switching tube is negative terminal；The grid of the N type switch tube is connected with a gate drive circuit, the gate drive circuit
It is connected with a charge protector, a discharge protection circuit, a charger detection circuit.
Battery protection integrated circuit as described above, wherein, the discharge protection circuit includes：On one first logic circuit
An electric discharge over-current detection circuit is connected with, one crosses and puts detection circuit, a short-circuit detecting circuit, first logic circuit passes through
One first delay circuit is connected with the gate drive circuit.
Battery protection integrated circuit as described above, wherein, the charge protector includes：On one second logic circuit
Be connected with a charging abnormal detection circuit, one overcharge detection circuit, second logic circuit by one second delay circuit with
The gate drive circuit connection.
Battery protection integrated circuit as described above, wherein, first logic circuit and second logic circuit it
Between be connected with an excess temperature detection circuit, an oscillator.
Battery protection integrated circuit as described above, wherein, in addition to a Substrate bias circuit, the Substrate bias circuit
Two inputs be connected in source electrode and the drain electrode of the N type switch tube, the Substrate bias circuit is also opened with the N-type
Close the substrate connection of pipe.
Battery protection integrated circuit as described above, wherein, the Substrate bias circuit and the charger detection circuit
Connection.
Battery protection integrated circuit as described above, wherein, the charger detection circuit also with the N type switch tube
Source electrode connects.
Battery protection integrated circuit as described above, wherein, an in addition to benchmark dot circuit, the reference circuit with it is described
Battery core connects.
Battery protection integrated circuit as described above, wherein, the Substrate bias circuit includes：One level shifting circuit bag
Including two control signal outputs, two control signal outputs control a first switch pipe, a second switch pipe respectively, and described first
Switching tube is connected between the battery core negative pole and the substrate of the N type switch tube, and the second switch pipe is connected to described negative
Between end and the substrate of the N type switch tube.
Battery protection integrated circuit as described above, wherein, it is connected with one between the positive pole of the negative terminal and the battery core
Load or charger.
In summary, by adopting the above-described technical solution, the present invention solves the integrated electricity of battery protection in the prior art
The problem of road production process is more, PCB surface product is big and cost is higher, gate drive circuit, charge protection are connected using in N type switch tube
Circuit, discharge protection circuit, charger detection circuit realize the normal protection of battery, also, use technical scheme
PCB surface product is small, and has also declined compared to prior art, cost.
Brief description of the drawings
Fig. 1 is the circuit diagram of battery protecting circuit in the prior art；
Fig. 2 is the circuit diagram of battery protection integrated circuit of the present invention；
Fig. 3 is the circuit block diagram of battery protection integrated circuit of the present invention；
Fig. 4 is the circuit diagram of the Substrate bias circuit of battery protection integrated circuit of the present invention.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples：
Fig. 2 is the circuit diagram of battery protection integrated circuit of the present invention, and Fig. 3 is the circuit block of battery protection integrated circuit of the present invention
Figure, refers to Fig. 2, Fig. 3, a kind of battery protection integrated circuit, wherein, including：The drain electrode of one N type switch tube 1 and a battery core 2
Negative pole（T1）Connection, another source electrode of N type switch tube 1 is negative terminal（T2）；The grid of N type switch tube 1 and a gate drive circuit 17
Connection, gate drive circuit 17 are connected with a charge protector 12, a discharge protection circuit 11, a charger detection circuit 16.
The gate drive circuit 17 of the present invention, charge protector 12, discharge protection circuit 11, charger detection circuit 16 can
See the control module of an entirety as.
During present invention work, the output of gate drive circuit 17 is high so as to control N type switch tube 1 to turn on, so that battery
The operation discharged or charged.
Discharge protection circuit 11 of the present invention includes：Be connected with one first logic circuit an electric discharge over-current detection circuit,
One puts detection circuit, a short-circuit detecting circuit excessively, and the first logic circuit is connected by one first delay circuit with gate drive circuit 17
Connect.
Charge protector 12 of the present invention includes：A charging abnormal detection circuit, one are connected with one second logic circuit
Detection circuit is overcharged, the second logic circuit is connected by one second delay circuit with gate drive circuit 17.
Excess temperature detection circuit 15, an oscillator are connected between first logic circuit and the second logic circuit of the invention
14。
Present invention additionally comprises a Substrate bias circuit 18, two inputs of Substrate bias circuit 18 are connected to N-type and opened
Close in source electrode and the drain electrode of pipe 1, substrate of the Substrate bias circuit 18 also with N type switch tube 1 is connected.
Substrate bias circuit 18 of the present invention is connected with charger detection circuit 16.
Source electrode of the charger detection circuit 16 of the present invention also with N type switch tube 1 connects.
Present invention additionally comprises a benchmark dot circuit（T4）, reference circuit 13 is connected with battery core 2.
A load or charger are connected between negative terminal of the present invention and the positive pole of battery core 2.
In one embodiment of the invention, charger detection circuit 16 monitors negative terminal voltage, when monitoring negative terminal voltage
Higher than a certain setting voltage V1, charger detection circuit 16 exports battery discharge status signal, and integrated circuit operation is protected in electric discharge
Shield state.Gate drive circuit 17 receive the output signal of discharge protection circuit 11, according to the output signal of discharge protection circuit 11 come
Control N type switch tube 1.Substrate bias circuit 18 connects the substrate of N type switch tube 1 to the negative pole end of battery core 2.Work as discharge protection circuit
11 and excess temperature detection circuit 15 detect brownout, discharge current is excessive, load short circuits, when integrated circuit excess temperature etc. is abnormal,
Discharge protection circuit 11 carries out logical process, exports the cut-off signals of N type switch tube 1, and N type switch tube 1 turns off.So as to protect battery
With load equipment safety.
When charger detection circuit 16 monitors that negative terminal voltage is less than a certain setting voltage V2, charger detection circuit 16 is defeated
Go out battery charging state signal, integrated circuit operation is in charge protection state.Gate drive circuit 17 receives charge protector 12
Output signal, N type switch tube 1 is controlled according to the output signal of charge protector 12.Substrate bias circuit 18 connects N-type and opened
The substrate of pipe 1 is closed to negative terminal.Detect that cell voltage is too high when charge protector 12 and excess temperature detect circuit 15, charging current
Excessive, when integrated circuit excess temperature etc. is abnormal, charge protector 12 does some logical process, the output shut-off letter of N type switch tube 1
Number, N type switch tube 1 turns off, so as to protect battery and charging equipment safety.
Fig. 4 is the circuit diagram of the Substrate bias circuit 18 of battery protection integrated circuit of the present invention, refers to Fig. 4, and substrate is inclined
Circuits 18 include：One level shifting circuit includes two control signal outputs, and two control signal outputs control one respectively
One switching tube, a second switch pipe, first switch pipe are connected between the negative pole of battery core 2 and the substrate of N type switch tube 1, and second opens
Pipe is closed to be connected between negative terminal and the substrate of N type switch tube 1.
Further, level shifting circuit includes：By the 3rd metal-oxide-semiconductor（M3）, the 4th metal-oxide-semiconductor（M4）, the 5th metal-oxide-semiconductor
（M5）, the 6th metal-oxide-semiconductor（M6）, the 7th metal-oxide-semiconductor（M7）, the 8th metal-oxide-semiconductor（M8）, the first phase inverter and the second reverser such as accompanying drawing 4
Shown mode connects.
Claims (10)
- A kind of 1. battery protection integrated circuit, it is characterised in that including：The drain electrode of one N type switch tube connects with the negative pole of a battery core Connect, another source electrode of the N type switch tube is negative terminal；The grid of the N type switch tube is connected with a gate drive circuit, the grid Drive circuit is connected with a charge protector, a discharge protection circuit, a charger detection circuit.
- 2. battery protection integrated circuit according to claim 1, it is characterised in that the discharge protection circuit includes：One An electric discharge over-current detection circuit is connected with first logic circuit, one crosses and puts detection circuit, a short-circuit detecting circuit, described the One logic circuit is connected by one first delay circuit with the gate drive circuit.
- 3. battery protection integrated circuit according to claim 2, it is characterised in that the charge protector includes：One A charging abnormal detection circuit is connected with second logic circuit, one overcharges detection circuit, second logic circuit passes through one Second delay circuit is connected with the gate drive circuit.
- 4. battery protection integrated circuit according to claim 3, it is characterised in that first logic circuit and described the Excess temperature detection circuit, an oscillator are connected between two logic circuits.
- 5. battery protection integrated circuit according to claim 1, it is characterised in that also including a Substrate bias circuit, institute Two inputs for stating Substrate bias circuit are connected in source electrode and the drain electrode of the N type switch tube, the Substrate bias electricity Substrate of the road also with the N type switch tube is connected.
- 6. battery protection integrated circuit according to claim 5, it is characterised in that the Substrate bias circuit fills with described Electrical Testing circuit connects.
- 7. battery protection integrated circuit according to claim 1, it is characterised in that the charger detection circuit also with institute State the source electrode connection of N type switch tube.
- 8. battery protection integrated circuit according to claim 1, it is characterised in that described also including a benchmark dot circuit Reference circuit is connected with the battery core.
- 9. battery protection integrated circuit according to claim 1, it is characterised in that the Substrate bias circuit includes：One Level shifting circuit includes two control signal outputs, and two control signal outputs control a first switch pipe, one second respectively Switching tube, the first switch pipe are connected between the battery core negative pole and the substrate of the N type switch tube, the second switch Pipe is connected between the negative terminal and the substrate of the N type switch tube.
- 10. battery protection integrated circuit according to claim 1, it is characterised in that the negative terminal and the battery core are just A load or charger are connected between pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610615637.0A CN107681637A (en) | 2016-08-01 | 2016-08-01 | Battery protection integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610615637.0A CN107681637A (en) | 2016-08-01 | 2016-08-01 | Battery protection integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107681637A true CN107681637A (en) | 2018-02-09 |
Family
ID=61133684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610615637.0A Pending CN107681637A (en) | 2016-08-01 | 2016-08-01 | Battery protection integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107681637A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483335A (en) * | 2009-02-03 | 2009-07-15 | 赛芯微电子（苏州）有限公司 | Highly integrated battery protection circuit |
| CN201365118Y (en) * | 2009-02-03 | 2009-12-16 | 赛芯微电子（苏州）有限公司 | Battery protection circuit with high integration level |
| CN102005734A (en) * | 2010-10-20 | 2011-04-06 | 无锡中星微电子有限公司 | Battery protection integrated circuit and system |
| CN103474967A (en) * | 2012-06-07 | 2013-12-25 | 苏州赛芯电子科技有限公司 | Highly-integrated battery protection circuit |
| CN206498189U (en) * | 2016-08-01 | 2017-09-15 | 上海晶准电子科技有限公司 | Battery protection integrated circuit |
-
2016
- 2016-08-01 CN CN201610615637.0A patent/CN107681637A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483335A (en) * | 2009-02-03 | 2009-07-15 | 赛芯微电子（苏州）有限公司 | Highly integrated battery protection circuit |
| CN201365118Y (en) * | 2009-02-03 | 2009-12-16 | 赛芯微电子（苏州）有限公司 | Battery protection circuit with high integration level |
| CN102005734A (en) * | 2010-10-20 | 2011-04-06 | 无锡中星微电子有限公司 | Battery protection integrated circuit and system |
| CN103474967A (en) * | 2012-06-07 | 2013-12-25 | 苏州赛芯电子科技有限公司 | Highly-integrated battery protection circuit |
| CN206498189U (en) * | 2016-08-01 | 2017-09-15 | 上海晶准电子科技有限公司 | Battery protection integrated circuit |
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