CN217282202U - Low-power consumption protection circuit - Google Patents
Low-power consumption protection circuit Download PDFInfo
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- CN217282202U CN217282202U CN202220225930.7U CN202220225930U CN217282202U CN 217282202 U CN217282202 U CN 217282202U CN 202220225930 U CN202220225930 U CN 202220225930U CN 217282202 U CN217282202 U CN 217282202U
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- resistor
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- mos pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the technical field of lithium batteries, in particular to a low-power consumption protection circuit, which comprises a MOS tube, a resistor, a voltage stabilizer, a triode and a lithium battery monomer cell protection chip, the MOS tube comprises a first MOS tube, a second MOS tube and a third MOS tube, the resistors comprise a first resistor and a second resistor, when the battery power is insufficient, has the function of self-locking of the switch, when the protection is operated, the switch is equivalent to the disconnection to cut off the discharge loop of the battery, meanwhile, the power supply of the protection circuit can be cut off, the extremely low power consumption is ensured, the over-discharge is prevented, the voltage comparison detection circuit consists of a lithium battery monomer cell protection chip and a low-temperature high-precision resistor, the first resistor and the second resistor form a resistor voltage division network, therefore, the stability of the operation of the circuit can be improved, and the precision, the operation stability and the reliability of the protection voltage can be improved.
Description
Technical Field
The utility model relates to a lithium cell technical field specifically is a low-power consumption protection circuit.
Background
As is well known, lithium batteries supply power to loads in series and parallel connection or serve as energy storage units, lithium batteries need to be provided with a lithium battery acquisition management circuit due to the characteristics of the lithium batteries, and the conventional battery management circuit adopts single battery detection and protection.
Along with the development of the lithium battery industry, the consistency of batteries is better and better, and for the application occasions of low power and low current, the number of series-connected batteries is more, single batteries are detected, the number of wire harnesses is more, and the power consumption of each battery is inconsistent.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a reliable and stable low-power consumption protection circuit.
(II) technical scheme
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a low-power consumption protection circuit, includes MOS pipe, resistance, stabiliser, triode and lithium electricity monomer electricity core protection chip, the MOS pipe includes first MOS pipe, second MOS pipe and third MOS pipe, resistance includes first resistance and second resistance, the base of triode is connected with the GS utmost point of first MOS pipe, the electrode and the stabiliser of triode are connected, the projecting pole of second MOS pipe is connected through the control end of first resistance and lithium electricity monomer electricity core protection chip, the source electrode and the drain electrode of first MOS pipe are connected gradually through the pin of first resistance and lithium electricity monomer electricity core protection chip, the source electrode and the drain electrode of second MOS pipe are connected gradually through the pin of second resistance and lithium electricity monomer electricity core protection chip
Further, the utility model discloses an improvement has, first resistance includes RI resistance, R2 resistance and R3 resistance, the second resistance includes R4 resistance, R5 resistance, R6 resistance and R7 resistance, first MOS pipe is Q1, the second MOS pipe is Q2, the third MOS pipe is Q3.
Further, the utility model discloses the improvement has, first MOS pipe, second MOS pipe and third MOS pipe are low on resistance's P channel MOS pipe.
Furthermore, the utility model discloses the improvement has, the triode is PNP type triode.
Further, the utility model discloses the improvement have, first resistance and second resistance be low temperature high accuracy resistance.
Furthermore, the utility model discloses the improvement has, lithium electricity monomer electricity core protection chip's input voltage is 3.7-22V.
(III) advantageous effects
Compared with the prior art, the utility model provides a low-power consumption protection circuit possesses following beneficial effect:
the utility model discloses a circuit has switch "auto-lock" function when battery power is not enough, and the switch cuts off the battery discharge return circuit in other words "disconnection" when the protection action, can also cut off protection circuit's power simultaneously, ensures extremely low consumption, prevents that the overdischarge from appearing.
The voltage comparison detection circuit is composed of the lithium battery single cell protection chip and the low-temperature high-precision resistor, and the first resistor and the second resistor can form a resistor voltage division network, so that the working stability of the circuit can be improved, and the precision, the working stability and the reliability of the protection voltage are improved.
Drawings
FIG. 1 is a schematic 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.
Please refer to fig. 1, the utility model discloses a low-power consumption protection circuit, including MOS pipe, resistance, stabiliser, triode and lithium electricity monomer electricity core protection chip, the MOS pipe includes first MOS pipe, second MOS pipe and third MOS pipe, resistance includes first resistance and second resistance, the base of triode is connected with the GS utmost point of first MOS pipe, the electrode and the stabiliser of triode are connected, the projecting pole of second MOS pipe is connected through the control end of first resistance and lithium electricity monomer electricity core protection chip, the source electrode and the drain electrode of first MOS pipe are connected gradually through the pin of first resistance with lithium electricity monomer electricity core protection chip, the source electrode and the drain electrode of second MOS pipe are connected gradually through the pin of second resistance with lithium electricity monomer electricity core protection chip.
As shown in fig. 1, the first resistor includes an RI resistor, an R2 resistor, and an R3 resistor, the second resistor includes an R4 resistor, an R5 resistor, an R6 resistor, and an R7 resistor, the first MOS is Q1, the second MOS is Q2, and the third MOS is Q3.
In the embodiment in this market, the first MOS transistor, the second MOS transistor, and the third MOS transistor are P-channel MOS transistors with low on-resistance, so that the precision, the working stability, and the reliability of the protection voltage are improved.
In this embodiment, the triode is a PNP triode, so that the stability of the triode in use is improved, and the stability of the discharge protection maintaining circuit and the output short circuit detection circuit is improved.
In this embodiment, the first resistor and the second resistor are low-temperature high-precision resistors, so as to improve the stability of the circuit.
In this embodiment, the input voltage of the lithium battery cell protection chip is 3.7-22V, so that the application range of the lithium battery cell protection chip is expanded, and the working stability of the lithium battery cell protection chip is ensured, thereby maintaining the normal operation of the battery cell protection chip.
In conclusion, the low-power-consumption protection circuit is a lithium battery total voltage protection and short circuit protection circuit, the first MOS tube controls discharge, the third MOS tube controls charge, the first resistor and the second resistor can form a resistor voltage division network, the first resistor and the second resistor follow the lithium battery single cell protection chip to detect through the second emitter, the lithium battery single cell protection chip outputs voltage conversion driving circuits to control charge and discharge of the first MOS tube and the third MOS tube, total voltage detection and protection of the battery are achieved, the circuit below the first MOS tube is an output short circuit detection and discharge protection maintaining circuit, the GS voltage of the first MOS tube is reduced through the third tube, and the discharge control of the first MOS tube is turned off.
The utility model discloses a circuit has switch "auto-lock" function when battery power is not enough, and the switch cuts off the battery discharge return circuit in other words "disconnection" when the protection action, can also cut off protection circuit's power simultaneously, ensures extremely low consumption, prevents that the overdischarge from appearing.
The voltage comparison detection circuit is composed of the lithium battery single cell protection chip and the low-temperature high-precision resistor, and the first resistor and the second resistor can form a resistor voltage division network, so that the working stability of the circuit can be improved, and the voltage protection precision, the working stability and the reliability are improved.
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 (6)
1. The utility model provides a low-power consumption protection circuit, its characterized in that, includes MOS pipe, resistance, stabiliser, triode and lithium electricity monomer electricity core protection chip, the MOS pipe includes first MOS pipe, second MOS pipe and third MOS pipe, resistance includes first resistance and second resistance, the base of triode is connected with the GS utmost point of first MOS pipe, the electrode and the stabiliser of triode are connected, the projecting pole of second MOS pipe is connected through the control end of first resistance with lithium electricity monomer electricity core protection chip, the source electrode and the drain electrode of first MOS pipe are connected gradually through the pin of first resistance with lithium electricity monomer electricity core protection chip, the source electrode and the drain electrode of second MOS pipe are connected gradually through the pin of second resistance with lithium electricity monomer electricity core protection chip.
2. The low power protection circuit of claim 1, wherein the first resistor comprises an RI resistor, an R2 resistor, and an R3 resistor, the second resistor comprises an R4 resistor, an R5 resistor, an R6 resistor, and an R7 resistor, the first MOS transistor is Q1, the second MOS transistor is Q2, and the third MOS transistor is Q3.
3. The protection circuit of claim 2, wherein the first MOS transistor, the second MOS transistor, and the third MOS transistor are P-channel MOS transistors with low on-resistance.
4. A low power consumption protection circuit according to claim 3, wherein the transistor is a PNP transistor.
5. A low power consumption protection circuit according to claim 4, wherein said first resistor and said second resistor are low temperature high precision resistors.
6. The low-power-consumption protection circuit according to claim 5, wherein an input voltage of the lithium battery cell protection chip is 3.7-22V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220225930.7U CN217282202U (en) | 2022-01-25 | 2022-01-25 | Low-power consumption protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220225930.7U CN217282202U (en) | 2022-01-25 | 2022-01-25 | Low-power consumption protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217282202U true CN217282202U (en) | 2022-08-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220225930.7U Active CN217282202U (en) | 2022-01-25 | 2022-01-25 | Low-power consumption protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217282202U (en) |
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2022
- 2022-01-25 CN CN202220225930.7U patent/CN217282202U/en active Active
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