CN217362614U - Fast charge control circuit of polymer lithium ion battery pack - Google Patents
Fast charge control circuit of polymer lithium ion battery pack Download PDFInfo
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- CN217362614U CN217362614U CN202220538037.XU CN202220538037U CN217362614U CN 217362614 U CN217362614 U CN 217362614U CN 202220538037 U CN202220538037 U CN 202220538037U CN 217362614 U CN217362614 U CN 217362614U
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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
Abstract
The utility model discloses a polymer lithium ion battery wraps control circuit that fills soon, this polymer lithium ion battery wraps control circuit that fills soon is including the USB interface that connects gradually, the charge management chip, the filtering output unit, charge switch the control unit, a charge end for connecting the battery, a MCU main control chip for controlling the work of charge switch the control unit, with USB interface connection and for the power supply unit of MCU main control chip power supply, be connected with the charge end and be used for detecting battery voltage's battery voltage detection return circuit, a battery power display return circuit for detecting the NTC temperature detection return circuit of temperature and being used for showing battery power, MCU main control chip is all connected in this NTC temperature detection return circuit and battery power display return circuit. The utility model discloses can carry out charge-discharge management control to a lesson polymer lithium ion battery package to there is and carries out multiple protect function to the battery package, still can realize battery power display function.
Description
The technical field is as follows:
the utility model relates to a technical field that charges refers in particular to a polymer lithium ion battery wraps fast control circuit that fills.
Background art:
the traditional charging protection circuit has single function, has the risk of protection failure, has great influence on the service life of a battery after failure, and even can cause safety problems.
In view of this, the present inventors propose the following.
The utility model has the following contents:
an object of the utility model is to overcome prior art's not enough, provide a polymer lithium ion battery package control circuit that fills soon.
In order to solve the technical problem, the utility model discloses a following technical scheme: the quick charge control circuit of the polymer lithium ion battery pack comprises a USB interface, a charge management chip, a filter output unit, a charge switch control unit, a charge end for connecting a battery, an MCU main control chip for controlling the charge switch control unit to work, a power supply unit connected with the USB interface and supplying power to the MCU main control chip, a battery voltage detection circuit connected with the charge end and used for detecting the voltage of the battery, an NTC temperature detection circuit for detecting the temperature and a battery power display circuit for displaying the battery power, wherein the NTC temperature detection circuit and the battery power display circuit are both connected with the MCU main control chip.
Further, in the above technical solution, the signal of the charging management chip is MP2696, which has functions of pre-charging, constant-current and constant-voltage charging, and charging turn-off protection.
Further, in the above technical solution, the filtering output unit includes an inductor L1, and a capacitor C13 and a capacitor C14 connected to two ends of the inductor L1, respectively, and the capacitor C13 and the capacitor C14 are both grounded; one end of the inductor L1 is connected with the charging management chip, and the other end of the inductor L1 is connected with the charging end after being connected with the resistor R27-1 and the fuse F1.
Further, in the above technical solution, the charge switch control unit includes a transistor Q10, a transistor Q20, and a MOS transistor Q12, wherein a C-pole of the transistor Q10 is connected to a VDD terminal after being connected to a resistor R15, a C-pole of the transistor Q10 is further connected to an MCU main control chip, a D-pole of the MOS transistor Q12 is connected to a charge management chip, an S-pole of the MOS transistor Q12 is connected to a charge terminal, a G-pole of the MOS transistor Q12 is connected to the MCU main control chip, and a resistor R28 is connected between the S-pole and the D-pole of the MOS transistor Q12; the B pole of the triode Q10 is connected with the rear of the resistor R47 and then connected with the charging end, the E pole of the triode Q10 is grounded, the B pole of the triode Q120 is connected with the D pole of the MOS tube Q12 after being connected with the R26, the C pole of the triode Q20 is connected with the MCU master control chip after being connected with the resistor R9 and the diode D4, the E pole of the triode Q20 is connected with the S pole of the MOS tube Q12, and the D pole of the MOS tube Q12 is connected with the diode D3 and then connected with the connecting line between the resistor R9 and the diode D4.
Further, in the above technical solution, the MCU main control chip has a model of ES7P 003.
Further, in the above technical solution, the power supply unit includes a diode D1 connected to the USB interface, a diode D2 connected to the filtering output unit, a voltage regulator chip connected to the diode D1, and a VDD terminal connected to an output terminal of the voltage regulator chip, where the model of the voltage regulator chip is CE6375a 50M.
Further, in the above technical solution, the battery voltage detection circuit includes a MOS transistor Q17, a resistor R35 connected to the D-pole of the MOS transistor Q17, a resistor R46 connected to the S-pole of the MOS transistor Q17, and a capacitor C20 connected in parallel to two ends of the resistor R46, the G-pole of the MOS transistor Q17 is connected to the MCU main control chip, the S-pole of the MOS transistor Q17 is further connected to the MCU main control chip, and the resistor R35 is connected to the charging terminal.
Further, in the above technical solution, the NTC temperature detection circuit includes an NTC thermistor, a resistor R20 connected to the NTC thermistor, and a capacitor C17-1 connected in parallel to two ends of the NTC thermistor, a connection line between the NTC thermistor and the resistor R20 is connected to the MCU main control chip, the other end of the resistor R20 is connected to the 2.495V end, the other end of the NTC thermistor connected to the resistor R20 is grounded, the 2.495V end is connected to the regulator circuit, the regulator circuit includes a precise regulator chip U2, a pin a of the precise regulator chip U2 is grounded, a pin K of the precise regulator chip U2 is connected to the main control MCU chip after being connected to the resistor R1, a pin R of the precise regulator chip U2 is connected to the MCU main control chip, and a pin R and a pin K of the precise regulator chip U2 are connected to the 2.495V end.
Furthermore, in the above technical solution, the battery power display circuit includes a plurality of LED lamps respectively used for indicating different power percentages of the battery, and each LED lamp is connected to the MCU main control chip.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model detects and detects the battery voltage through the battery voltage detection circuit, and the MCU main control chip controls the battery power display circuit to display the battery power, so the use is more convenient, and when the voltage is detected to be 0V, the battery-free state is realized, the MCU main control chip controls the disconnection of the charging switch control unit, the charging switch control unit is in the standby state, and the whole circuit can be protected; when the voltage is detected to be greater than 0V, the MCU main control chip controls the charging switch control unit to be opened, the charging management chip controls the whole circuit to pre-charge the battery, and then constant-current constant-voltage charging is carried out, so that the service life of the battery is ensured; when the NTC temperature detection circuit detects the temperature and the temperature is higher than the preset temperature, the MCU main control chip controls the charging switch control unit to be disconnected so as to protect the whole circuit. That is to say, the utility model discloses can carry out charge-discharge supervisory control to a lesson polymer lithium ion battery package to there is and carries out multiple protect function to the battery package, still can realize battery power display function.
Description of the drawings:
fig. 1 is a circuit diagram of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
Referring to fig. 1, the fast charge control circuit for a polymer lithium ion battery pack includes a USB interface 1, a charge management chip 2, a filter output unit 3, a charge switch control unit 4, a charge terminal 5 for connecting a battery, an MCU main control chip 6 for controlling the charge switch control unit 4 to work, a power supply unit 7 connected to the USB interface 1 and supplying power to the MCU main control chip 6, a battery voltage detection circuit 8 connected to the charge terminal 5 and detecting a battery voltage, an NTC temperature detection circuit 9 for detecting a temperature, and a battery power display circuit 10 for displaying a battery power, wherein the NTC temperature detection circuit 9 and the battery power display circuit 10 are both connected to the MCU main control chip 6. The above batteries refer to polymer lithium ion battery packs. The utility model discloses a battery voltage detection return circuit 8 detects the detection battery voltage to by MCU main control chip 6 control battery power display circuit 10 show battery power, it is more convenient to use, and when detecting voltage to be 0V, then be battery-free state, MCU main control chip 6 control charge switch control unit 4 disconnection, be in standby state, can protect whole circuit; when the voltage is detected to be greater than 0V, the MCU main control chip 6 controls the charging switch control unit 4 to be opened, the charging management chip 2 controls the whole circuit to pre-charge the battery, and then constant-current and constant-voltage charging is carried out, so that the service life of the battery is ensured; when the NTC temperature detection circuit 9 detects the temperature and is higher than the preset temperature, the MCU main control chip 6 controls the charging switch control unit 4 to be switched off so as to protect the whole circuit. That is to say, the utility model discloses can carry out charge-discharge supervisory control to a lesson polymer lithium ion battery package to there is and carries out multiple protect function to the battery package, still can realize battery power display function.
The signal of the charging management chip 2 is MP2696, which has the functions of pre-charging, constant-current and constant-voltage charging, and charging turn-off protection. The charging management chip 2 is used for controlling charging management and has the main functions of pre-charging, constant-current and constant-voltage charging, charging turn-off protection and charging recovery. According to the utility model relates to a line parameter, battery voltage 0V can get into the precharge and flow and be 150mA, when the conversion is normally charged, charging voltage is 3.0V, and the constant current of normally charging is 1800mA, and the protection of charging is 4.2V, and the recovery of charging is 4.0V.
The filtering output unit 3 comprises an inductor L1, and a capacitor C13 and a capacitor C14 which are respectively connected with two ends of the inductor L1, and the capacitor C13 and the capacitor C14 are both grounded; one end of the inductor L1 is connected with the charging management chip 2, the other end of the inductor L1 is connected with the charging terminal 5 after being connected with the resistor R27-1 and the fuse F1, and the charging voltage output by the filtering output unit 3 is 4.2V.
The charging switch control unit 4 comprises a triode Q10, a triode Q20 and a MOS transistor Q12, wherein the C pole of the triode Q10 is connected with a VDD terminal 71 after being connected with a resistor R15, the C pole of the triode Q10 is also connected with an MCU main control chip 6, the D pole of the MOS transistor Q12 is connected with a charging management chip 2, the S pole of the MOS transistor Q12 is connected with a charging terminal 5, the G pole of the MOS transistor Q12 is connected with the MCU main control chip 6, and a resistor R28 is connected between the S pole and the D pole of the MOS transistor Q12; the B pole of the triode Q10 is connected with the rear end of a resistor R47 and then connected with a charging end 5, the E pole of the triode Q10 is grounded, the B pole of the triode Q120 is connected with the rear end of a resistor R26 and then connected with the D pole of a MOS tube Q12, the C pole of the triode Q20 is connected with the rear end of a resistor R9 and a diode D4 and then connected with an MCU main control chip 6, the E pole of the triode Q20 is connected with the S pole of a MOS tube Q12, and the D pole of the MOS tube Q12 is also connected with a diode D3 and then connected with a connecting line between the resistor R9 and a diode D4.
The MCU main control chip 6 is ES7P 003.
The power supply unit 7 comprises a diode D1 connected with the USB interface 1, a diode D2 connected with the filtering output unit 3, a voltage stabilizing chip 72 connected with the diode D1, and a VDD terminal 71 connected with the output terminal of the voltage stabilizing chip 72, wherein the model of the voltage stabilizing chip 72 is CE6375a 50M.
The battery voltage detection circuit 8 comprises an MOS tube Q17, a resistor R35 connected with the D pole of the MOS tube Q17, a resistor R46 connected with the S pole of the MOS tube Q17 and a capacitor C20 connected with the two ends of the resistor R46 in parallel, the G pole of the MOS tube Q17 is connected with the MCU main control chip 6, the S pole of the MOS tube Q17 is also connected with the MCU main control chip 6, and the resistor R35 is connected with the charging end 5. The utility model discloses when charging or discharging, MCU main control chip 6's 13 foot output high level, MOS pipe Q17 switches on, detects battery voltage through resistance R35 and resistance R46 partial pressure.
The NTC temperature detection circuit 9 comprises an NTC thermistor 91, a resistor R20 connected with the NTC thermistor 91 and a capacitor C17-1 connected in parallel with two ends of the NTC thermistor 91, a connecting wire between the NTC thermistor 91 and the resistor R20 is connected with the MCU main control chip 6, the other end of the resistor R20 is connected with a 2.495V end 92, the other end of the NTC thermistor 91 connected with the resistor R20 is grounded, the 2.495V end 92 is connected with the voltage stabilizing source circuit 93, the voltage stabilizing source circuit 93 comprises a precise voltage stabilizing source chip U2, an A pin of the precise voltage stabilizing source chip U2 is grounded, a K pin of the precise voltage stabilizing source chip U2 is connected with the MCU main control chip 6 after being connected with the resistor R1, an R pin of the precise voltage stabilizing source chip U2 is connected with the MCU main control chip 6, and the 2.495V end 92 is connected with the R pin and the K pin of the precise voltage stabilizing source chip U2. The NTC temperature detection loop 9 is used for detecting the surface temperature of the battery in the charging and discharging process, collecting the temperature by the NTC thermistor 91, and monitoring the temperature by connecting a pin 19 of the MCU main control chip 6. When the temperature anomaly is detected, the output signal of the pin 11 of the MCU main control chip 6 is used for communicating with the pin 16 of the charging management chip 2 so as to control.
The battery power display circuit 10 comprises a plurality of LED lamps which are respectively used for indicating different power percentages of the battery, and each LED lamp is connected with the MCU main control chip 6.
To sum up, the utility model discloses a battery voltage detection circuit 8 detects and detects battery voltage to by MCU main control chip 6 control battery power display circuit 10 show battery power, it is more convenient to use, and when detecting voltage to be 0V, then be battery-free state, MCU main control chip 6 control charging switch control unit 4 disconnection, be in standby state, can protect whole circuit; when the voltage is detected to be greater than 0V, the MCU main control chip 6 controls the charging switch control unit 4 to be opened, the charging management chip 2 controls the whole circuit to pre-charge the battery, and then constant-current and constant-voltage charging is carried out, so that the service life of the battery is ensured; when the NTC temperature detection circuit 9 detects the temperature and is higher than the preset temperature, the MCU main control chip 6 controls the charging switch control unit 4 to be switched off so as to protect the whole circuit. That is to say, the utility model discloses can carry out charge-discharge supervisory control to a lesson polymer lithium ion battery package to there is and carries out multiple protect function to the battery package, still can realize battery power display function.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. A polymer lithium ion battery package fast charge control circuit which characterized in that: the device comprises a USB interface (1), a charging management chip (2), a filtering output unit (3), a charging switch control unit (4), a charging end (5) for connecting a battery, an MCU (micro control unit) main control chip (6) for controlling the charging switch control unit (4) to work, a power supply unit (7) which is connected with the USB interface (1) and supplies power for the MCU main control chip (6), a battery voltage detection loop (8) which is connected with the charging end (5) and is used for detecting the voltage of the battery, an NTC temperature detection loop (9) for detecting the temperature and a battery power display loop (10) for displaying the power of the battery, wherein the NTC temperature detection loop (9) and the battery power display loop (10) are both connected with the MCU main control chip (6).
2. The polymer lithium ion battery pack fast charge control circuit according to claim 1, characterized in that: the signal of the charging management chip (2) is MP2696 which has the functions of pre-charging, constant-current constant-voltage charging and charging turn-off protection.
3. The polymer lithium ion battery pack fast charging control circuit of claim 2, characterized in that: the filtering output unit (3) comprises an inductor L1, and a capacitor C13 and a capacitor C14 which are respectively connected with two ends of the inductor L1, and the capacitor C13 and the capacitor C14 are both grounded; one end of the inductor L1 is connected with the charging management chip (2), and the other end of the inductor L1 is connected with the charging terminal (5) after being connected with the resistor R27-1 and the fuse F1.
4. The polymer lithium ion battery pack fast charge control circuit according to claim 2, characterized in that: the charging switch control unit (4) comprises a triode Q10, a triode Q20 and an MOS transistor Q12, wherein the C pole of the triode Q10 is connected with a VDD (71) after being connected with a resistor R15, the C pole of the triode Q10 is also connected with an MCU (microprogrammed control unit) main control chip (6), the D pole of the MOS transistor Q12 is connected with a charging management chip (2), the S pole of the MOS transistor Q12 is connected with a charging end (5), the G pole of the MOS transistor Q12 is connected with the MCU main control chip (6), and a resistor R28 is connected between the S pole and the D pole of the MOS transistor Q12; the B pole of the triode Q10 is connected with the charging end (5) after being connected with the resistor R47, the E pole of the triode Q10 is grounded, the B pole of the triode Q120 is connected with the D pole of the MOS tube Q12 after being connected with the resistor R26, the C pole of the triode Q20 is connected with the MCU main control chip (6) after being connected with the resistor R9 and the diode D4, the E pole of the triode Q20 is connected with the S pole of the MOS tube Q12, and the D pole of the MOS tube Q12 is connected with the diode D3 and then is connected with the connecting line between the resistor R9 and the diode D4.
5. The polymer lithium ion battery pack fast charging control circuit of claim 4, characterized in that: the MCU main control chip (6) is ES7P003 in model.
6. The polymer lithium ion battery pack fast charge control circuit according to any one of claims 1 to 5, characterized in that: the power supply unit (7) comprises a diode D1 connected with the USB interface (1), a diode D2 connected with the filtering output unit (3), a voltage stabilizing chip (72) connected with the diode D1 and a VDD end (71) connected with the output end of the voltage stabilizing chip (72), wherein the model of the voltage stabilizing chip (72) is CE6375A 50M.
7. The polymer lithium ion battery pack fast charge control circuit according to any one of claims 1 to 5, characterized in that: the battery voltage detection circuit (8) comprises an MOS tube Q17, a resistor R35 connected with the D pole of the MOS tube Q17, a resistor R46 connected with the S pole of the MOS tube Q17 and a capacitor C20 connected with the two ends of the resistor R46 in parallel, the G pole of the MOS tube Q17 is connected with an MCU main control chip (6), the S pole of the MOS tube Q17 is also connected with the MCU main control chip (6), and the resistor R35 is connected with a charging end (5).
8. The polymer lithium ion battery pack fast charge control circuit according to any one of claims 1 to 5, characterized in that: the NTC temperature detection circuit (9) comprises an NTC thermistor (91), a resistor R20 connected with the NTC thermistor (91) and a capacitor C17-1 connected with the two ends of the NTC thermistor (91) in parallel, the connecting line between the NTC thermistor (91) and the resistor R20 is connected with the MCU main control chip (6), the other end of the resistor R20 is connected with a 2.495V end (92), the other end of the NTC thermistor (91) connected with the resistor R20 is grounded, the 2.495V end (92) is connected with a voltage regulator circuit (93), the voltage regulator circuit (93) comprises a precise voltage regulator chip U2, the pin A of the precise voltage-stabilizing source chip U2 is grounded, the pin K of the precise voltage-stabilizing source chip U2 is connected with a resistor R1 and then is connected with an MCU main control chip (6), the R pin of the precise voltage-stabilizing source chip U2 is connected with the MCU main control chip (6), and the 2.495V end (92) is connected with the R pin and the K pin of the precise voltage-stabilizing source chip U2.
9. The polymer lithium ion battery pack fast charge control circuit according to any one of claims 1 to 5, characterized in that: the battery power display circuit (10) comprises a plurality of LED lamps which are respectively used for indicating different power percentages of the battery, and each LED lamp is connected with the MCU main control chip (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220538037.XU CN217362614U (en) | 2022-03-11 | 2022-03-11 | Fast charge control circuit of polymer lithium ion battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220538037.XU CN217362614U (en) | 2022-03-11 | 2022-03-11 | Fast charge control circuit of polymer lithium ion battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN217362614U true CN217362614U (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220538037.XU Active CN217362614U (en) | 2022-03-11 | 2022-03-11 | Fast charge control circuit of polymer lithium ion battery pack |
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| CN (1) | CN217362614U (en) |
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- 2022-03-11 CN CN202220538037.XU patent/CN217362614U/en active Active
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