CN209072112U - A kind of battery and its protection circuit, intrinsic safety type smart phone - Google Patents
A kind of battery and its protection circuit, intrinsic safety type smart phone Download PDFInfo
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- CN209072112U CN209072112U CN201821992878.8U CN201821992878U CN209072112U CN 209072112 U CN209072112 U CN 209072112U CN 201821992878 U CN201821992878 U CN 201821992878U CN 209072112 U CN209072112 U CN 209072112U
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- battery
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Abstract
The utility model relates to electronic technology fields; more particularly to a kind of battery and its protection circuit, intrinsic safety type smart phone; battery protecting circuit includes: at least one level protection circuit and safety device; protection circuits at different levels are cascade connection; wherein, every grade of protection circuit includes: a battery protection ic, a field-effect tube, a capacitor and two resistance.Battery protecting circuit provided in this embodiment; pass through setting management of charging and discharging chip and field-effect tube; when short circuit, overcurrent, over-voltage occurs or overcharges; the charging pins or electric discharge pin of management of charging and discharging chip export corresponding level; so that field-effect tube immediately turns off, so as to be rapidly performed by the short circuit of battery circuit, overcurrent, over-voltage or overcharge protection.
Description
Technical field
The utility model relates to electronic technology field more particularly to a kind of battery and its protection circuits, intrinsic safety type intelligence hand
Machine.
Background technique
With the rapid development of information technology, various intelligent wireless terminal devices obtain in people's production and life
It is commonly used, and the cell device in intelligent terminal uses lithium battery substantially.And coal mine, natural gas, petrochemical industry and
The fields such as weaving, there are explosive gas and dust atmosphere, used electrical equipment has to comply with this security protection of national regulation
Quick-fried standard.
But since lithium battery itself is there are inflammable and explosive characteristic, the protection circuit of existing charging and discharging lithium battery
Instantaneous short circuit current amplitude is up to tens amperes, and the response time more than 100 microseconds, is unable to reach intrinsic safe explosion-proof short circuit electricity
Pressure/electric current is in 12V/5A standard below, and therefore, existing lithium battery can not be applied to explosive gas and dust atmosphere, limit
Intelligent wireless terminal device has been made in the application of the numerous areas such as coal mine, natural gas, petrochemical industry and weaving.
Utility model content
Technical problem to be solved in the utility model is in view of the deficiencies of the prior art, to provide a kind of battery and its protection
Circuit, intrinsic safety type smart phone.
The technical solution that the utility model solves above-mentioned technical problem is as follows:
A kind of battery protecting circuit, comprising: at least one level protects circuit and safety device, and protection circuits at different levels are that cascade is closed
System, wherein every grade of protection circuit includes: a battery protection ic, a field-effect tube, a capacitor and two resistance,
Wherein,
The first end of first resistor by the safety device connect the same level protect circuit input positive terminal, and with it is described
The same level protects the output cathode end connection of circuit；
The second end of the first resistor connects the positive pin of the first end of the capacitor, the battery protection ic；
The second end of the capacitor connects the negative pin of the battery protection ic, the source electrode of the field-effect tube and described
The output negative pole end of the same level protection circuit；
The over-current detection pin of the battery protection ic is connected to the input that described the same level protects circuit by second resistance
Negative pole end；
The charging pins of the battery protection ic connect the grid of the field-effect tube with electric discharge pin.
Based on the above technical solution, the utility model can also do following improvement.
Further, the field-effect tube is double N-channel field-effect tube.
Further, the model CEM9926 of double N-channel field-effect tube.
Further, the model S-8261AAJMD-G2J-T2 of the battery protection ic.
Further, the battery protecting circuit includes: that circuit is protected described in two-stage, and previous stage is protecting the output of circuit just
The input positive terminal of extreme connection rear stage protection circuit, the output negative pole end connection of the previous stage protection circuit are described latter
The input negative pole end of grade protection circuit.
Further, the safety device is fuse.
The beneficial effects of the utility model are: the battery protecting circuit of the utility model protection, by the way that charge and discharge fulgurite is arranged
Chip and field-effect tube are managed, when short circuit, overcurrent, over-voltage occurs or overcharges, the charging pins of management of charging and discharging chip or is put
Electric pin exports corresponding level, so that field-effect tube immediately turns off, so as to be rapidly performed by short circuit, the mistake of battery circuit
Stream, over-voltage overcharge protection.
The utility model solves the as follows of the another technical solution of above-mentioned technical problem:
A kind of battery, comprising: the battery protecting circuit as described in above-mentioned any embodiment.
Further, the battery is sealed to obtain by the ontology glue of the battery protecting circuit and the battery.
The utility model solves the as follows of the another technical solution of above-mentioned technical problem:
A kind of intrinsic safety type smart phone, comprising: such as above-mentioned battery as described in the examples.
The advantages of the utility model additional aspect, will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the utility model practice.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, below will to the utility model embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings described below is only
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of battery protecting circuit of the utility model embodiment；
Fig. 2 is a kind of structural schematic diagram of battery protecting circuit of another embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is a part of the embodiment of the utility model, rather than is all implemented
Example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained all should belong to the range of the utility model protection.
A kind of battery protecting circuit as shown in Figure 1, comprising: at least one level protects circuit and safety device, protections at different levels
Circuit is cascade connection.Wherein, every grade of protection circuit includes: a battery protection ic, a field-effect tube, a capacitor
C1 and two resistance.
The first end of first resistor connects the input positive terminal (P+) that the same level protects circuit, and and the same level by safety device
Protect output cathode end (B+) connection of circuit.The first end and battery protection ic of the second end connection capacitor of first resistor are just
Pole pin (VDD).
The negative pin (VSS) of second end connection battery protection ic, the source electrode (S) of field-effect tube and the same level protection of capacitor
The output negative pole end (B-) of circuit.The detection pin (VM) of battery protection ic is connected to the same level by second resistance R2 and protects circuit
Input negative pole end (P-).The charging pins (CO) of battery protection ic and the grid of electric discharge pin (DO) connection field-effect tube Q1
(G)。
Specifically, in this embodiment, field-effect tube Q1 is double N-channel field-effect tube, and the type of double N-channel field-effect tube
Number be CEM9926.
In addition, the model S-8261AAJMD-G2J-T2 of battery protection ic.Safety device is fuse.
Optionally, in one embodiment, battery protecting circuit includes: dual-electrode protecting circuit.Previous stage protects circuit
Output cathode end (P+) connects the input positive terminal (P+) of rear stage protection circuit；The output negative pole end of previous stage protection circuit
(B-) the input negative pole end (P-) of connection rear stage protection circuit.
The working principle in the utility model embodiment is described below with reference to Fig. 2.
Battery protecting circuit as shown in Figure 2 includes, previous stage protection circuit, rear stage protect circuit and fuse F.Its
In, it can be management of charging and discharging chip U1, field-effect tube Q1, capacitor C1 and electricity that it includes: battery protection ic that previous stage, which protects circuit,
Hinder R1, R2.It can be management of charging and discharging chip U2, field-effect tube Q2, capacitor C2 that it includes: battery protection ic that rear stage, which protects circuit,
With resistance R3, R4.
The first end of resistance R1 and R3 are connected to the input positive terminal (P+) that previous stage protects circuit by fuse F, and
Connect the output cathode end (B+) of rear stage protection circuit.Obviously, after output cathode end (B+) connection of previous stage protection circuit
The input positive terminal (P+) of first class of protection circuit.
The second end of resistance R1 and the first end of capacitor C1 are connected on the positive pin (VDD) of U1.The second of capacitor C1
The negative pin (VSS) of end and U1 are connected to the output negative pole end (B-) of rear stage protection circuit.Grid (the G1 of field-effect tube Q1
And G2) it is connected to charging pins (CO) and electric discharge pin (DO) of U1.The source electrode (S1) and rear stage of field-effect tube Q1 protects electricity
The output negative pole end (B-) on road connects, and the source electrode (S2) of field-effect tube Q1 and the over-current detection pin (VM) of U1 are connected by resistance R2
It is connected to the input negative pole end (P-) of previous stage protection circuit.
The second end of resistance R3 and the first end of capacitor C2 are connected on the positive pin (VDD) of U2.The second of capacitor C2
The negative pin (VSS) of end and U2 are connected to output negative pole end (B-) (that is: the rear stage protection circuit of previous stage protection circuit
It inputs negative pole end (P-)).The grid (G1 and G2) of field-effect tube Q2 is connected to charging pins (CO) and electric discharge pin (DO) of U2.
Output negative pole end (B-) connection of source electrode (S1) and previous stage the protection circuit of field-effect tube Q2, the source electrode (S2) of field-effect tube Q2
The input negative pole end (P-) that previous stage protects circuit is connected to by resistance R4 with the over-current detection pin (VM) of U2.
Wherein, the rated current of fuse F is 2A, and the resistance value of resistance R1, R3 are respectively 470 Ω, the resistance value of resistance R2, R4
Respectively 2K Ω, the capacitance of capacitor C1, C2 are respectively 100nF.
Specifically, in this embodiment, there are situations in following 4 for battery protecting circuit:
1, normal charging condition
Charging current is filled from input positive terminal (P+) to output cathode end (B+) by battery to output negative pole end (B-)
The charging pins CO of electric discharge managing chip U1 and U2 export high level, and metal-oxide-semiconductor Q1 is connected with the G2 foot of metal-oxide-semiconductor Q2 at this time, are formed
Charged state.
2, regular picture state
Discharge current is filled from output cathode end (B+) to input positive terminal (P+) by loading to input negative pole end (P-)
The electric discharge pin DO of electric discharge managing chip U1 and U2 export low level, and metal-oxide-semiconductor Q1 is connected with the G1 foot of metal-oxide-semiconductor Q2 at this time, are formed
Discharge condition.
3, short circuit and overcurrent protection state
When short circuit or overcurrent occur for input positive terminal (P+) and input negative pole end (P-), S2 in metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2
Foot voltage increases, this voltage is delivered to the end VM of management of charging and discharging chip U1 and U2 through R2 and R4, and with management of charging and discharging chip
Built-in operational amplification circuit is compared, when the point of metal-oxide-semiconductor Q1 and the S2 foot of metal-oxide-semiconductor Q2 is higher than management of charging and discharging chip U1
With U2 built in a reference source when, the DO foot of management of charging and discharging chip U1 and U2 exports high level, at this time metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2
The shutdown of G1 foot, forms guard mode.
4, over-voltage and guard mode is overcharged
When inputting positive terminal (P+) voltage more than specified overvoltage protection value or fully charged battery, this voltage is defeated with R2 through R1
It send to the vdd terminal of management of charging and discharging chip U1 and U2, and be compared with the operational amplification circuit of management of charging and discharging built-in chip type,
When vdd voltage is higher than load voltage value, the CO foot of management of charging and discharging chip U1 and U2 exports low level, at this time metal-oxide-semiconductor Q1 with
The G2 foot of metal-oxide-semiconductor Q2 turns off, and forms guard mode.
Therefore, the battery protecting circuit in the various embodiments described above, by the way that management of charging and discharging chip and field-effect tube is arranged, when
When short circuit, overcurrent, over-voltage occurs or overcharging, the charging pins or the corresponding electricity of electric discharge pin output of management of charging and discharging chip
It is flat, so that field-effect tube immediately turns off, so as to be rapidly performed by the short circuit of battery circuit, overcurrent, over-voltage or overcharge guarantor
Shield.
In addition, the utility model also provides a kind of battery, comprising: such as the battery protecting circuit in above-mentioned any embodiment.
Specifically, in this embodiment, battery is sealed to obtain by the ontology glue of battery protecting circuit and battery.
Battery provided in this embodiment, due to using the battery protecting circuit in above-described embodiment, it is thus possible to improve electric
The safety in pond makes battery meet the intrinsic safe explosion-proof standard of national regulation.
The utility model also provides a kind of intrinsic safety type smart phone, comprising: such as the battery in above-mentioned any embodiment.
Intrinsic safety type smart phone provided in this embodiment, by due to using including the battery protection electricity in above-described embodiment
The battery on road enhances the explosion-proof performance of intrinsic safety type smart phone, makes the intrinsic safe explosion-proof of the intrinsic safety type smart phone national regulation, extensively
It is general to be applied to the numerous areas such as coal mine, natural gas, petrochemical industry and weaving.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (9)
1. a kind of battery protecting circuit characterized by comprising at least one level protects circuit and safety device, protection electricity at different levels
Road is cascade connection, wherein every grade of protection circuit include: a battery protection ic, a field-effect tube, a capacitor and
Two resistance；
The first end of first resistor by the safety device connect the same level protect circuit input positive terminal, and with described the same level
Protect the output cathode end connection of circuit；
The second end of the first resistor connects the positive pin of the first end of the capacitor, the battery protection ic；
The second end of the capacitor connects the negative pin of the battery protection ic, the source electrode of the field-effect tube and described the same level
Protect the output negative pole end of circuit；
The over-current detection pin of the battery protection ic is connected to the input cathode that described the same level protects circuit by second resistance
End；
The charging pins of the battery protection ic connect the grid of the field-effect tube with electric discharge pin.
2. battery protecting circuit according to claim 1, which is characterized in that the field-effect tube is double N-channel field-effects
Pipe.
3. battery protecting circuit according to claim 2, which is characterized in that the model of double N-channel field-effect tube
CEM9926。
4. battery protecting circuit according to claim 1, which is characterized in that the model S- of the battery protection ic
8261AAJMD-G2J-T2。
5. battery protecting circuit described in any one of -4 according to claim 1, which is characterized in that the battery protecting circuit packet
It including: protecting circuit described in two-stage, previous stage protects the input positive terminal of the output cathode end connection rear stage protection circuit of circuit,
The output negative pole end of the previous stage protection circuit connects the input negative pole end of the rear stage protection circuit.
6. battery protecting circuit described in any one of -4 according to claim 1, which is characterized in that the safety device is insurance
Silk.
7. a kind of battery characterized by comprising such as battery protecting circuit of any of claims 1-6.
8. battery according to claim 7, which is characterized in that the battery is by the battery protecting circuit and the battery
Ontology glue seal to obtain.
9. a kind of intrinsic safety type smart phone characterized by comprising battery as claimed in claim 7 or 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821992878.8U CN209072112U (en) | 2018-11-29 | 2018-11-29 | A kind of battery and its protection circuit, intrinsic safety type smart phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821992878.8U CN209072112U (en) | 2018-11-29 | 2018-11-29 | A kind of battery and its protection circuit, intrinsic safety type smart phone |
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| Publication Number | Publication Date |
|---|---|
| CN209072112U true CN209072112U (en) | 2019-07-05 |
Family
ID=67100884
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821992878.8U Active CN209072112U (en) | 2018-11-29 | 2018-11-29 | A kind of battery and its protection circuit, intrinsic safety type smart phone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638903A (en) * | 2018-11-29 | 2019-04-16 | 北斗天地股份有限公司山东分公司 | A kind of battery and its protection circuit, intrinsic safety type smart phone |
| CN115085344A (en) * | 2022-08-22 | 2022-09-20 | 山西科达自控股份有限公司 | Intrinsic safety explosion-proof circuit of lithium battery box |
-
2018
- 2018-11-29 CN CN201821992878.8U patent/CN209072112U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638903A (en) * | 2018-11-29 | 2019-04-16 | 北斗天地股份有限公司山东分公司 | A kind of battery and its protection circuit, intrinsic safety type smart phone |
| CN115085344A (en) * | 2022-08-22 | 2022-09-20 | 山西科达自控股份有限公司 | Intrinsic safety explosion-proof circuit of lithium battery box |
| CN115085344B (en) * | 2022-08-22 | 2022-11-15 | 山西科达自控股份有限公司 | Intrinsic safety explosion-proof circuit of lithium battery box |
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