CN218997756U - Charge-discharge protection circuit of battery - Google Patents

Charge-discharge protection circuit of battery Download PDF

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Publication number
CN218997756U
CN218997756U CN202320077889.8U CN202320077889U CN218997756U CN 218997756 U CN218997756 U CN 218997756U CN 202320077889 U CN202320077889 U CN 202320077889U CN 218997756 U CN218997756 U CN 218997756U
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resistor
capacitor
integrated circuit
circuit
mos tube
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CN202320077889.8U
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洪少华
付朝霞
余召智
陈奕祺
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Zhuhai Keyan Electronic Technology Co ltd
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Zhuhai Keyan Electronic Technology Co ltd
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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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Abstract

The utility model discloses a charge and discharge protection circuit of a battery, which comprises a charge and discharge circuit, a control circuit and a communication circuit, wherein the control circuit is respectively and electrically connected with the charge and discharge circuit and the communication circuit; the control circuit comprises an integrated circuit, the model of the integrated circuit is BQ3060, and in the charge-discharge protection circuit of the battery, the integrated circuit is electrically connected with the charge-discharge circuit and has the functions of charge overcurrent, charge overvoltage, discharge overcurrent, discharge undervoltage, short circuit, charge-discharge overtemperature, undertemperature protection and the like, and meanwhile, the integrated circuit is electrically connected with the communication circuit, so that the circuit has the SMB communication function, and the practicability of the charge-discharge protection circuit of the battery is improved.

Description

Charge-discharge protection circuit of battery
Technical Field
The utility model relates to the field of battery charge and discharge protection circuits, in particular to a battery charge and discharge protection circuit.
Background
In the conventional battery charging circuit, a protection circuit is generally added to improve the reliability of charging and discharging of the battery. The current protection circuit only performs current and voltage limiting protection on charge and discharge, also lacks the functions of discharge under-voltage, short circuit, charge and discharge over-temperature, under-temperature protection and the like, and does not have the SMB communication function.
In summary, a charge-discharge protection circuit for a battery is designed.
Disclosure of Invention
In order to overcome the defects, the utility model provides a charge-discharge protection circuit of a battery.
The utility model realizes the above purpose through the following technical scheme:
a charge and discharge protection circuit of a battery comprises a charge and discharge circuit, a control circuit and a communication circuit, wherein the control circuit is electrically connected with the charge and discharge circuit and the communication circuit respectively;
the control circuit comprises an integrated circuit, and the model number of the integrated circuit is BQ3060;
the communication circuit comprises a seventh resistor, an eighth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a ninth capacitor, a tenth capacitor, an eighth capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor and a fifteenth capacitor, the fifth end of the integrated circuit is connected with the seventh resistor, the fifth end of the integrated circuit is grounded through the tenth capacitor, the sixth end of the integrated circuit is connected with the eighth resistor, the sixth end of the integrated circuit is grounded through the ninth capacitor, the eighth end of the integrated circuit is connected with the seventh end of the integrated circuit through the eighth capacitor, the two ends of the eighth capacitor are respectively grounded through the twelfth capacitor and the thirteenth capacitor, the eighth end of the integrated circuit is grounded through a series circuit composed of the sixteenth resistor and the nineteenth resistor, the seventeenth end of the integrated circuit is grounded through the seventeenth resistor, the sixteenth end of the integrated circuit is grounded through the seventeenth resistor, the sixth end of the integrated circuit is connected with the eighth resistor and the eighth resistor, the sixteenth resistor is connected with the fifteenth end of the seventeenth resistor, the seventeenth resistor is respectively connected with the seventeenth capacitor and the fifteenth capacitor, the seventeenth resistor is connected with the seventeenth resistor respectively, the seventeenth resistor and the seventeenth resistor is connected with the fifteenth resistor respectively, the seventeenth resistor is connected with the seventeenth resistor respectively, and the seventeenth resistor respectively.
Preferably, the charge-discharge circuit comprises a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eleventh capacitor, a sixteenth capacitor, a second diode and a first diode, the types of the first MOS transistor, the second MOS transistor, the third MOS transistor and the fourth MOS transistor are NC010PG, the types of the first MOS transistor, the third MOS transistor and the fourth MOS transistor are all connected with each other, the second end of the integrated circuit is connected with the fourth end of the first MOS transistor through the third resistor, the fourth end of the integrated circuit is connected with the fourth end of the third MOS transistor through the fourth resistor, the fourth end of the fourth MOS transistor is connected with the fourth end of the fourth MOS transistor through the fourth end of the fourth resistor and the fourth end of the fourth resistor, the fourth end of the fourth MOS transistor is connected with the fourth end of the fourth MOS transistor through the fourth end of the fourth resistor is connected with the fourth end of the fourth MOS transistor, the other end of the series circuit formed by the first capacitor and the second capacitor is connected with the first end of the second MOS tube, the twenty-fourth end of the integrated circuit is grounded through the sixth capacitor, the twenty-fourth end of the integrated circuit is connected with the cathode of the first diode, the anode of the first diode is connected with the third end of the fourth MOS tube, the anode of the first diode is grounded through the series circuit formed by the third capacitor and the fourth capacitor, the twenty-first end of the integrated circuit is grounded through the sixth resistor, the twentieth end of the integrated circuit is grounded through the seventh capacitor, the nineteenth end of the integrated circuit is grounded through the sixteenth capacitor, and the eighteenth end of the integrated circuit is grounded through the sixteenth capacitor.
The beneficial effects of the utility model are as follows: in the charge-discharge protection circuit of the battery, the integrated circuit is electrically connected with the charge-discharge circuit, and has the functions of charge overcurrent, charge overvoltage, discharge overcurrent, discharge undervoltage, short circuit, charge-discharge overtemperature, undertemperature protection and the like.
Drawings
The utility model will now be described by way of example and with reference to the accompanying drawings in which:
fig. 1 is a schematic circuit diagram of the present utility model.
Detailed Description
The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.
As shown in fig. 1, a charge-discharge protection circuit of a battery includes a charge-discharge circuit, a control circuit and a communication circuit, wherein the control circuit is electrically connected with the charge-discharge circuit and the communication circuit respectively;
the control circuit comprises an integrated circuit U1, and the model number of the integrated circuit U1 is BQ3060;
the communication circuit comprises a seventh resistor R7, an eighth resistor R8, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a ninth capacitor C9, a tenth capacitor C10, an eighth capacitor C8, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14 and a fifteenth capacitor C15, wherein the fifth end of the integrated circuit U1 is connected with the seventh resistor R7, the fifth end of the integrated circuit U1 is grounded through the tenth capacitor C10, the sixth end of the integrated circuit U1 is grounded through the ninth capacitor C9, the seventh end of the integrated circuit U1 is grounded through the fifteenth resistor R15, the eighth end of the integrated circuit U1 is connected with the seventh end of the integrated circuit U1 through the eighth capacitor C8, the two ends of the eighth capacitor C8 are respectively grounded through a twelfth capacitor C12 and a thirteenth capacitor C13, the eighth end of the integrated circuit U1 is grounded through a series circuit formed by a sixteenth resistor R16 and a nineteenth resistor R19, the ninth end of the integrated circuit U1 is grounded through a fourteenth resistor R14, the seventeenth end of the integrated circuit U1 is grounded through a seventeenth resistor R17, the sixteenth end of the integrated circuit U1 is connected with a series circuit formed by a tenth resistor R10 and an eleventh resistor R11, the tenth end of the integrated circuit U1 is connected with a series circuit formed by a twelfth resistor R12 and a third resistor R3, one end of the fourteenth capacitor C14 is connected with a tenth resistor R10 and an eleventh resistor R11 respectively, the other end of the fourteenth capacitor C14 is connected with the sixteenth resistor R16 and the nineteenth resistor R19 respectively, one end of the fifteenth capacitor C15 is connected with the twelfth resistor R12 and the thirteenth resistor R13 respectively, the other end of the fifteenth capacitor C15 is connected to the sixteenth resistor R16 and the nineteenth resistor R19, respectively, and one end of the eighteenth resistor R18 is connected to the fourteenth capacitor C14 and the fifteenth capacitor C15, respectively.
Specifically, the charge-discharge circuit includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eleventh capacitor C11, a sixteenth capacitor C16, a second diode D2 and a first diode D1, models of the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3 and the fourth MOS transistor Q4 are NC010PG, the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3 and fifth to eighth ends of the fourth MOS transistor Q4 are all connected with each other, the second end of the integrated circuit U1 is respectively connected with the fourth MOS transistor Q1 and the fourth MOS transistor Q3 through the third resistor R3, the second end of the integrated circuit U1 is respectively connected with the first end to the third end of the first MOS tube Q1 and the first end to the third end of the third MOS tube Q3 through a series circuit formed by a third resistor R3 and a first resistor R1, the first end of the integrated circuit U1 is grounded through a fifth capacitor C5, the first end of the integrated circuit U1 is connected with the cathode of a second diode D2, the anode of the second diode D2 is respectively connected with the third end of the integrated circuit U1 and the fourth end of the integrated circuit U1 through a fifth resistor R5, the third end of the integrated circuit U1 is grounded through an eleventh capacitor C11, the anode of the second diode D2 is connected with the first end of the first MOS tube Q1, the twenty-third end of the integrated circuit U1 is respectively connected with the fourth end of the second MOS tube Q2 and the fourth end of the fourth MOS tube Q4 through a fourth resistor R4, the third twenty-end of the integrated circuit U1 is respectively connected with the first end to the third end of the second MOS tube Q2 and the first end to the third end of the fourth MOS tube Q4 through a serial circuit formed by a fourth resistor R4 and a second resistor R2, one end of the serial circuit formed by a first capacitor C1 and a second capacitor C2 is connected with the first end of the first MOS tube Q1, the other end of the serial circuit formed by the first capacitor C1 and the second capacitor C2 is connected with the first end of the second MOS tube Q2, the fourth end of the integrated circuit U1 is grounded through a sixth capacitor C6, the fourth end of the integrated circuit U1 is connected with the cathode of the first diode D1, the anode of the first diode D1 is grounded through a serial circuit formed by a third capacitor C3 and a fourth capacitor C4, the first twenty-end of the integrated circuit U1 is grounded through a sixth resistor R6, the twenty-end of the integrated circuit U1 is grounded through a seventh capacitor C7, and the sixteenth end of the integrated circuit U1 is grounded through a nineteenth capacitor C16.
The working principle of the charge-discharge protection circuit of the battery is that the circuit has the functions of charge overcurrent, charge overvoltage, discharge overcurrent, discharge undervoltage, short circuit, charge-discharge overtemperature, undertemperature protection and the like, and has the SMB communication function.
Normal working state
All the battery voltages are between the overcharge detection voltage and the overdischarge detection voltage, the current is between the charge overcurrent and the discharge overcurrent, the temperature is between the charge and discharge overtemperature and the undertemperature, and the battery is in a normal working state.
Overcharge protection state
Under normal state, any battery voltage is larger than the overcharge detection voltage, and the output low level of the CHG terminal is used for turning off the charging MOSFET beyond the overcharge protection delay time, so that the charging MOSFET enters an overcharge protection state.
Over-discharge protection state
Under normal state, any battery voltage is less than the over-discharge protection voltage and exceeds the over-discharge protection delay time DSG terminal
The output low level turns off the discharge MOSFET and enters an over-discharge protection state.
Charging overcurrent protection state
When the voltage of the current detecting resistor on the main loop is less than the charging overcurrent detecting threshold value, the charging MOSFET is turned off by maintaining the output low level of the charging overcurrent detecting delay time CHG terminal, and the charging MOSFET enters a charging overcurrent protection state.
Discharge overcurrent protection state
When the voltage of the current detecting resistor on the main loop is detected to be greater than the discharge overcurrent detection threshold value, the DSG terminal outputs low level to turn off the discharge MOSFET and enter a discharge overcurrent protection state.
The present utility model has been made in view of the above-described circumstances, and it is an object of the present utility model to provide a portable electronic device capable of performing various changes and modifications without departing from the scope of the technical spirit of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (2)

1. A charge and discharge protection circuit of a battery is characterized in that: the device comprises a charge-discharge circuit, a control circuit and a communication circuit, wherein the control circuit is electrically connected with the charge-discharge circuit and the communication circuit respectively;
the control circuit comprises an integrated circuit, and the model number of the integrated circuit is BQ3060;
the communication circuit comprises a seventh resistor, an eighth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a ninth capacitor, a tenth capacitor, an eighth capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor and a fifteenth capacitor, the fifth end of the integrated circuit is connected with the seventh resistor, the fifth end of the integrated circuit is grounded through the tenth capacitor, the sixth end of the integrated circuit is connected with the eighth resistor, the sixth end of the integrated circuit is grounded through the ninth capacitor, the eighth end of the integrated circuit is connected with the seventh end of the integrated circuit through the eighth capacitor, the two ends of the eighth capacitor are respectively grounded through the twelfth capacitor and the thirteenth capacitor, the eighth end of the integrated circuit is grounded through a series circuit composed of the sixteenth resistor and the nineteenth resistor, the seventeenth end of the integrated circuit is grounded through the seventeenth resistor, the sixteenth end of the integrated circuit is grounded through the seventeenth resistor, the sixth end of the integrated circuit is connected with the eighth resistor and the eighth resistor, the sixteenth resistor is connected with the fifteenth end of the seventeenth resistor, the seventeenth resistor is respectively connected with the seventeenth capacitor and the fifteenth capacitor, the seventeenth resistor is connected with the seventeenth resistor respectively, the seventeenth resistor and the seventeenth resistor is connected with the fifteenth resistor respectively, the seventeenth resistor is connected with the seventeenth resistor respectively, and the seventeenth resistor respectively.
2. The charge-discharge protection circuit of a battery according to claim 1, wherein: the charge-discharge circuit comprises a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eleventh capacitor, a sixteenth capacitor, a second diode and a first diode, wherein the models of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube are NC010PG, the fifth end to the eighth end of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube are all connected with each other, the second end of the integrated circuit is respectively connected with the fourth end of the first MOS tube and the fourth end of the third MOS tube through the third resistor, the second end of the integrated circuit is respectively connected with the first end to the third end of the first MOS tube and the first end to the third end of the third MOS tube through a serial circuit formed by the third resistor and the first resistor, the first end of the integrated circuit is grounded through a fifth capacitor, the first end of the integrated circuit is connected with the cathode of a second diode, the anode of the second diode is respectively connected with the third end of the integrated circuit and the fourth end of the integrated circuit through a fifth resistor, the third end of the integrated circuit is grounded through an eleventh capacitor, the anode of the second diode is connected with the first end of a first MOS tube, the third twenty-end of the integrated circuit is respectively connected with the fourth end of a second MOS tube and the fourth end of a fourth MOS tube through a fourth resistor, the third twenty-end of the integrated circuit is respectively connected with the first end to the third end of the second MOS tube and the first end to the third end of the fourth MOS tube through a serial circuit formed by the fourth resistor and the second resistor, one end of the serial circuit formed by the first capacitor and the second capacitor is connected with the first end of the first MOS tube, the other end of the series circuit formed by the first capacitor and the second capacitor is connected with the first end of the second MOS tube, the twenty-fourth end of the integrated circuit is grounded through the sixth capacitor, the twenty-fourth end of the integrated circuit is connected with the cathode of the first diode, the anode of the first diode is connected with the third end of the fourth MOS tube, the anode of the first diode is grounded through the series circuit formed by the third capacitor and the fourth capacitor, the twenty-first end of the integrated circuit is grounded through the sixth resistor, the twentieth end of the integrated circuit is grounded through the seventh capacitor, the nineteenth end of the integrated circuit is grounded through the sixteenth capacitor, and the eighteenth end of the integrated circuit is grounded through the sixteenth capacitor.
CN202320077889.8U 2023-01-09 2023-01-09 Charge-discharge protection circuit of battery Active CN218997756U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320077889.8U CN218997756U (en) 2023-01-09 2023-01-09 Charge-discharge protection circuit of battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320077889.8U CN218997756U (en) 2023-01-09 2023-01-09 Charge-discharge protection circuit of battery

Publications (1)

Publication Number Publication Date
CN218997756U true CN218997756U (en) 2023-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320077889.8U Active CN218997756U (en) 2023-01-09 2023-01-09 Charge-discharge protection circuit of battery

Country Status (1)

Country Link
CN (1) CN218997756U (en)

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