CN209767171U - Low-power consumption lithium battery protection circuit - Google Patents
Low-power consumption lithium battery protection circuit Download PDFInfo
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- CN209767171U CN209767171U CN201920238994.9U CN201920238994U CN209767171U CN 209767171 U CN209767171 U CN 209767171U CN 201920238994 U CN201920238994 U CN 201920238994U CN 209767171 U CN209767171 U CN 209767171U
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Abstract
The utility model discloses a low-power consumption lithium cell protection circuit, including resistance (R1-R15), MOS pipe (Q1-Q6), lithium cell (BT1-BT6), switch S1, triode Q7, power BT7, lithium cell (BT1-BT6) concatenates in proper order, and lithium cell BT1 ' S input ground connection, lithium cell BT6 ' S output concatenation resistance R1 connect triode Q7 ' S collecting electrode, and triode Q7 ' S base concatenates in proper order resistance R14 and switch S1 and connects power BT7 ' S output. According to the low-power-consumption lithium battery protection circuit, the switch S1 is opened, all components in the circuit do not consume electric energy in a lithium battery (BT1-BT6), electric energy loss in the circuit is reduced, the switch S1 is closed, MOS (Q1-Q6) tubes are conducted, the circuit starts to consume electricity, and the circuit can be switched between a working state and an open and power-saving state by opening and closing the switch S1; the low-power-consumption lithium battery protection circuit has the advantages of low cost, high efficiency, simple structure, reduced electric energy loss and wide application.
Description
Technical Field
The utility model relates to a power electronic technology field specifically is a low-power consumption lithium cell protection circuit.
Background
In the design of an embedded system, a low-power-consumption design is widely applied to portable products and products with strong mobility, but the products do not always have sufficient power supply and usually depend on batteries for power supply, so that in the redesign process, the power consumption is reduced by considering each detail, and the service life of the batteries is prolonged as much as possible; according to the existing low-power-consumption technology, a component framework is complex, the manufacturing cost is increased, the control on power consumption cannot be accurate, and based on the method, the low-power-consumption lithium battery protection circuit is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low-power consumption lithium cell protection circuit has with low costs, and efficient, simple structure use extensive advantage, have solved among the prior art problem that the structure is complicated, and is with high costs.
In order to achieve the above object, the utility model provides a following technical scheme: a low-power-consumption lithium battery protection circuit comprises resistors (R1-R15), MOS (Q1-Q6), lithium batteries (BT1-BT6), a switch S1, a triode Q7 and a power supply BT7, wherein the lithium batteries (BT1-BT6) are sequentially connected in series, the input end of the lithium battery BT1 is grounded, the output end of the lithium battery BT6 is connected in series with a resistor R1 to be connected with the collector of a triode Q7, the base of the triode Q7 is sequentially connected in series with a resistor R14 and a switch S1 to be connected with the output end of a power supply BT7, the input end of the power supply BT7 is connected with the input end of a lithium battery BT6, and the base of a triode Q7 is connected with a resistor R; the output end of the lithium battery BT1 is connected with the source electrode of an MOS tube Q1, the grid electrode of an MOS tube Q1 is sequentially connected with a resistor R3 and a resistor R2 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube Q1 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT2 is connected with the source electrode of an MOS tube Q2, the grid electrode of an MOS tube Q2 is sequentially connected with a resistor R5 and a resistor R4 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 2 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT3 is connected with the source electrode of an MOS tube Q3, the grid electrode of an MOS tube Q3 is sequentially connected with a resistor R7 and a resistor R6 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 3 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT4 is connected with the source electrode of an MOS tube Q4, the grid electrode of an MOS tube Q4 is sequentially connected with a resistor R9 and a resistor R8 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 4 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT5 is connected with the source electrode of an MOS tube Q5, the grid electrode of an MOS tube Q5 is sequentially connected with a resistor R11 and a resistor R10 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube Q5 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT6 is connected with the source electrode of an MOS tube Q6, the grid electrode of an MOS tube Q6 is sequentially connected with a resistor R13 and a resistor R12 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 6 is connected with the collector electrode of a triode Q7.
preferably, the transistor Q7 is an NPN transistor.
Preferably, the resistor R2-the resistor R13 are voltage dividing resistors.
Preferably, the switch S1 is a push switch.
Compared with the prior art, the beneficial effects of the utility model are as follows:
The low-power-consumption lithium battery protection circuit is mainly characterized in that the on-off of a circuit is completed through the on-off of a triode Q7 and an MOS (metal oxide semiconductor) tube (Q1-Q6), all components in the circuit can not consume the electric energy in a lithium battery (BT1-BT6) under the condition that a switch S1 is switched off, the MOS tube (Q1-Q6) is switched on under the condition that the switch S1 is switched on, the circuit starts to consume the electric energy, the power supply BT7 supplies power for the whole circuit through manually switching on the switch S1, when the circuit is not needed, the circuit is switched off and stops working through manually switching off the switch S1, the electric energy can not be consumed, the electric energy loss in the circuit is reduced, the component framework is simpler, and the required cost is reduced; the low-power-consumption lithium battery protection circuit has the advantages of low cost, high efficiency, simple structure, reduced electric energy loss and wide application.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a low power consumption lithium battery protection circuit includes resistors (R1-R15), MOS transistors (Q1-Q6), lithium batteries (BT1-BT6), a switch S1, a transistor Q7, and a power supply BT7, where the transistor Q7 is an NPN-type transistor, the switch S1 is a key switch, the lithium batteries (BT1-BT 68628) are sequentially connected in series, an input terminal of the lithium battery BT 9 is grounded, an output terminal of the lithium battery BT6 is connected in series with a resistor R1 to a collector of the transistor Q7, a base of the transistor Q7 is sequentially connected in series with a resistor R14 and a switch S1 to an output terminal of the power supply BT7, an input terminal of the power supply BT7 is connected to an input terminal of the lithium battery BT7, and a base of the transistor Q7 is connected with the input terminal; the output end of the lithium battery BT1 is connected with the source electrode of an MOS tube Q1, the grid electrode of an MOS tube Q1 is sequentially connected with a resistor R3 and a resistor R2 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube Q1 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT2 is connected with the source electrode of an MOS tube Q2, the grid electrode of an MOS tube Q2 is sequentially connected with a resistor R5 and a resistor R4 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 2 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT3 is connected with the source electrode of an MOS tube Q3, the grid electrode of an MOS tube Q3 is sequentially connected with a resistor R7 and a resistor R6 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 3 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT4 is connected with the source electrode of an MOS tube Q4, the grid electrode of an MOS tube Q4 is sequentially connected with a resistor R9 and a resistor R8 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 4 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT5 is connected with the source electrode of an MOS tube Q5, the grid electrode of an MOS tube Q5 is sequentially connected with a resistor R11 and a resistor R10 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube Q5 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT6 is connected with the source electrode of the MOS tube Q6, the grid electrode of the MOS tube Q6 is sequentially connected with the resistor R13 and the resistor R12 in series and is connected with the input end of the power supply BT7, the drain electrode of the MOS tube 6 is connected with the collector electrode of the triode Q7, and the resistor R2-the resistor R13 are voltage dividing resistors.
The low-power-consumption lithium battery protection circuit is mainly characterized in that the on-off of the circuit is completed through the on-off of a triode Q7 and an MOS (metal oxide semiconductor) tube (Q1-Q6), under the condition that a switch S1 is switched off, a lithium battery (BT1-BT6) cannot supply power to all components in the circuit, so that all components in the circuit cannot consume the electric energy in the lithium battery (BT1-BT6), and under the condition that the switch S1 is switched on, the MOS tube (Q1-Q6) is switched on, so that the circuit is switched on, and a resistor (R1-R15) is switched on to start to consume the electric energy in the lithium battery (BT1-BT 6); the specific implementation steps are as follows: the switch S1 is closed, the triode Q7 is conducted, the grid G end of the MOS tube (Q1-Q6) is pulled low, the MOS tube (Q1-Q6) is conducted, and the resistor R2-the resistor R13 are effective; the switch S1 is turned off, the triode Q7 is turned off, the MOS tube (Q1-Q6) is turned off, the resistor R2-the resistor R13 are all failed, and the resistor R2-the resistor R13 cannot consume the electric energy of the lithium battery; the whole component framework is simpler, and the required cost is reduced; the low-power-consumption lithium battery protection circuit can be used in low-power-consumption electric appliances, such as electric shavers, electric toothbrushes and the like; the whole has the advantages of low cost, high efficiency, simple structure, reduced electric energy loss and wide application.
In summary, the following steps: the low-power-consumption lithium battery protection circuit is mainly characterized in that the on-off of a circuit is completed through the on-off of a triode Q7 and an MOS (metal oxide semiconductor) tube (Q1-Q6), all components in the circuit can not consume the electric energy in a lithium battery (BT1-BT6) under the condition that a switch S1 is switched off, the MOS tube (Q1-Q6) is switched on under the condition that the switch S1 is switched on, the circuit starts to consume the electric energy, the power supply BT7 supplies power for the whole circuit through manually switching on the switch S1, when the circuit is not needed, the circuit is switched off and stops working through manually switching off the switch S1, the electric energy can not be consumed, the electric energy loss in the circuit is reduced, the component framework is simpler, and the required cost is reduced; the low-power-consumption lithium battery protection circuit has the advantages of low cost, high efficiency, simple structure, reduced electric energy loss and wide application.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A low-power-consumption lithium battery protection circuit comprises resistors R1-R15, MOS transistors Q1-Q6, lithium batteries BT1-BT6, a switch S1, a triode Q7 and a power supply BT7, and is characterized in that: the lithium batteries (BT1-BT6) are sequentially connected in series, the input end of the lithium battery BT1 is grounded, the output end of the lithium battery BT6 is connected with a resistor R1 connected with the collector electrode of a triode Q7 in series, the base electrode of the triode Q7 is sequentially connected with a resistor R14 and a switch S1 in series and connected with the output end of a power supply BT7, the input end of a power supply BT7 is connected with the input end of a lithium battery BT6, and the base electrode of a triode Q7 is connected with a resistor R15 connected with the input end; the output end of the lithium battery BT1 is connected with the source electrode of an MOS tube Q1, the grid electrode of an MOS tube Q1 is sequentially connected with a resistor R3 and a resistor R2 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube Q1 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT2 is connected with the source electrode of an MOS tube Q2, the grid electrode of an MOS tube Q2 is sequentially connected with a resistor R5 and a resistor R4 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 2 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT3 is connected with the source electrode of an MOS tube Q3, the grid electrode of an MOS tube Q3 is sequentially connected with a resistor R7 and a resistor R6 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 3 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT4 is connected with the source electrode of an MOS tube Q4, the grid electrode of an MOS tube Q4 is sequentially connected with a resistor R9 and a resistor R8 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 4 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT5 is connected with the source electrode of an MOS tube Q5, the grid electrode of an MOS tube Q5 is sequentially connected with a resistor R11 and a resistor R10 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube Q5 is connected with the collector electrode of a triode Q7; the output end of the lithium battery BT6 is connected with the source electrode of an MOS tube Q6, the grid electrode of an MOS tube Q6 is sequentially connected with a resistor R13 and a resistor R12 in series and is connected with the input end of a power supply BT7, and the drain electrode of an MOS tube 6 is connected with the collector electrode of a triode Q7.
2. The low power consumption lithium battery protection circuit according to claim 1, wherein: the transistor Q7 is an NPN transistor.
3. The low power consumption lithium battery protection circuit according to claim 1, wherein: the resistor R2-the resistor R13 are voltage dividing resistors.
4. The low power consumption lithium battery protection circuit according to claim 1, wherein: the switch S1 is a push switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238994.9U CN209767171U (en) | 2019-02-25 | 2019-02-25 | Low-power consumption lithium battery protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920238994.9U CN209767171U (en) | 2019-02-25 | 2019-02-25 | Low-power consumption lithium battery protection circuit |
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| CN209767171U true CN209767171U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260337A (en) * | 2020-09-23 | 2021-01-22 | 中国电子科技集团公司第五十二研究所 | Low-power-consumption control circuit of lithium battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260337A (en) * | 2020-09-23 | 2021-01-22 | 中国电子科技集团公司第五十二研究所 | Low-power-consumption control circuit of lithium battery |
| CN112260337B (en) * | 2020-09-23 | 2022-07-12 | 中国电子科技集团公司第五十二研究所 | Low-power-consumption control circuit of lithium battery |
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