CN216720952U - Battery protection module unit based on digital control - Google Patents
Battery protection module unit based on digital control Download PDFInfo
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- CN216720952U CN216720952U CN202122638864.4U CN202122638864U CN216720952U CN 216720952 U CN216720952 U CN 216720952U CN 202122638864 U CN202122638864 U CN 202122638864U CN 216720952 U CN216720952 U CN 216720952U
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Abstract
The utility model relates to a battery protection module unit based on digital control, which is characterized in that a resistance-capacitance device is used as an auxiliary core element by adopting a digital control unit, and the battery protection during charging is completed by monitoring the charging current and the voltage of a battery. The battery protection during discharging is completed by monitoring the discharging voltage and current. The method solves the defects of complex circuit structure, low reliability, poor measurement precision, large circuit size and the like in the traditional method, effectively improves the visualization capability and reliability of battery protection, and has the characteristics of simple circuit, convenience in use, high detection precision, high reliability and the like.
Description
Technical Field
The utility model belongs to the field of battery protection, and particularly relates to a battery protection module unit based on digital control.
Background
In recent years, as the requirements for protecting the battery in the power supply system are more and more demanding, and the requirements for reliability, cost and circuit volume are more and more diversified, the circuit reliability is required to be high, the manufacturing cost is required to be low, and modularization, miniaturization and digitization are required to be realized. The reliability and stability of long-term operation must be high, and the interference killing feature must be strong. On the other hand, the traditional battery protection circuit has the disadvantages of complex circuit structure, low reliability, poor precision of protection points and large circuit volume. The traditional protection circuit has single function and cannot carry out digital quantization. The traditional battery protection mode can not meet the requirements of modern systems on the battery protection system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a battery protection module unit based on digital control, which is mainly used for finishing the protection during charging and discharging by collecting voltage and current signals during the charging and discharging of a battery through a collecting circuit and has the characteristics of simple circuit, convenience in use, high visualization degree, high reliability and the like.
The technical problem to be solved by the utility model is realized by adopting the following technical scheme:
a battery protection module unit based on digital control is connected with a battery charger and the output end of a battery and comprises a digital control unit, a diode D1, a resistor R1, a resistor R2, a MOS tube Q1 and a MOS tube Q2, wherein the digital control unit comprises a pin G1, a pin G2, a pin I1+, a pin I1-, a pin I2+, a pin I2-, a pin U1+ and a pin U1-, the anode output of the battery charger is connected with the anode of the diode D1, the cathode of the diode D1 is respectively connected with one end of the resistor R1 and the pin I1+ of the digital control unit, the other end of the resistor R1 is respectively connected with the anode of the battery, the pin I1-of the digital control unit and the pin U1+ of the digital control unit, the cathode output of the battery charger is connected with the source of the MOS tube Q1, the gate of the MOS tube Q1 is connected with the pin G1 of the digital control unit, and the drain of the MOS tube Q1 is respectively connected with the cathode of the resistor R2 of the battery, The pin U1-of the digital control unit and the pin I2-of the digital control unit, the other end of the resistor R2 is respectively connected with the pin I2+ of the digital control unit and the source of the MOS tube Q2, and the gate of the MOS tube Q2 is connected with the digital control unit and comprises a pin G2.
The resistor R1 and the resistor R2 are sampling resistors, and the resistor R1 and the resistor R2 are low-temperature-drift precision power resistors.
Moreover, the diode D1 adopts an anti-reverse-flow diode.
The MOS transistor Q1 and the MOS transistor Q2 are electronic switching transistors.
The utility model has the advantages and positive effects that:
the utility model adopts the digital control unit as a core element to assist the resistance-capacitance device, and finishes the battery protection during charging by monitoring the charging current and the voltage of the battery. The battery protection during discharging is completed by monitoring the discharging voltage and current. The method solves the defects of complex circuit structure, low reliability, poor measurement precision, large circuit size and the like in the traditional method, effectively improves the visualization capability and reliability of battery protection, and has the characteristics of simple circuit, convenience in use, high detection precision, high reliability and the like.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A battery protection module unit based on digital control is disclosed, as shown in FIG. 1, which connects a battery charger and the output end of a battery, and comprises a digital control unit, a diode D1, a resistor R1, a resistor R2, a MOS tube Q1 and a MOS tube Q2, wherein the digital control unit comprises a pin G1, a pin G2, a pin I1+, a pin I1-, a pin I2+, a pin I2-, a pin U1+ and a pin U1-, the anode output of the battery charger is connected with the anode of a diode D1, the cathode of a diode D1 is connected with one end of a resistor R1 and the pin I1+ of the digital control unit, the other end of the resistor R1 is connected with the anode of the battery, the pin I1-of the digital control unit and the pin U1+ of the digital control unit, the cathode output of the battery charger is connected with the source of a tube Q1, the gate of the MOS tube Q1 is connected with the pin G1, and the drain of the MOS tube Q1 is connected with the cathode of the resistor R2, The pin U1-of the digital control unit and the pin I2-of the digital control unit, the other end of the resistor R2 is respectively connected with the pin I2+ of the digital control unit and the source of the MOS tube Q2, and the gate of the MOS tube Q2 is connected with the digital control unit and comprises a pin G2.
The resistor R1 and the resistor R2 are used as sampling resistors, and the resistor R1 and the resistor R2 are precise power resistors with low temperature drift, so that the current sampling precision is improved.
The diode D1 adopts an anti-reverse-flow diode to prevent the voltage of the battery from reversely flowing to the charging unit to cause the damage of the charging loop.
The MOS tube Q1 and the MOS tube Q2 adopt electronic switching tubes, so that the circuit breaking function in an abnormal state is realized, and the battery is protected.
The working process of the utility model is as follows:
after the battery charger unit is protected by a diode D1 against reverse flow, the battery is charged, the current is gradually reduced along with the increase of the charging time, when the digital control power supply detects that the current is gradually reduced through I1+ and I1-, and when the charging current is reduced to about 10mA, G1 of the digital control unit controls the MOS tube Q1 to be opened, so that the charging process is completed.
When a discharging instruction is received, G2 of the digital control power supply controls a MOS tube Q2 channel to connect a battery loop, the battery discharges to a load end, the digital control power supply detects the magnitude of discharging current through I2+ and I2-, U1+ and U1-monitor the voltage state of the battery, and when the voltage of the battery is lower than a set value (according to the type of the battery), the MOS tube Q2 is opened, over-discharge protection is completed, and a charging instruction is waited.
And the digital control unit receives the state information transmitted by the battery charging sampling circuit, uploads the input state information to the management center in time, and adjusts the charging voltage according to the protection instruction to complete charging protection. The state information includes: charging voltage, charging current. And when an abnormal state occurs, the MOS tube G1 is turned off in time, and the charging loop is disconnected to finish final power-off protection. And meanwhile, the module unit provides the state information whether the battery is normal or not, so that the system reliability is improved.
And the digital control unit receives the state information transmitted by the battery discharge sampling circuit, uploads the input state information to the management center in time and executes a corresponding protection instruction. The state information includes: discharge voltage, discharge current. And when an abnormal state occurs, the power tube G2 is turned off in time, and the discharging loop is disconnected to finish the final power-off protection. And meanwhile, the state information of whether the battery is normal or not is provided, and the reliability of the system is improved.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (4)
1. The utility model provides a battery protection module unit based on digital control, connects the output of battery charger and battery which characterized in that:
the battery charger comprises a digital control unit, a diode D1, a resistor R1, a resistor R2, a MOS tube Q1 and a MOS tube Q2, wherein the anode output of the battery charger is connected with the anode of the diode D1, the cathode output current I1+ of a diode D1 is connected with one end of a resistor R1, the other end of the resistor R1 outputs current I1-and voltage U1+, the other end of the resistor R1 is connected with the anode of the battery, the cathode output of the battery charger is connected with the source of the MOS tube Q1, the grid of the MOS tube Q1 is connected with the I/O interface of the digital control unit and transmits a signal G1, the drain of the MOS tube Q1 outputs voltage U1-and current I2-, the drain of the MOS tube Q2 is respectively connected with the cathode of the battery and one end of the resistor R2, the other end of the resistor R2 outputs current I2+, the other end of the resistor R2 is connected with the source of the MOS tube Q2, the grid of the MOS tube Q2 is connected with the I/O interface of the digital control unit and transmits the signal G2, the I/O interface of the digital control unit receives a send signal G1, a signal G2, a current I1+, a current I1-, a current I2+, a current I2-, a voltage U1+ and a voltage U1-, respectively.
2. The battery protection module unit based on digital control according to claim 1, wherein: the resistor R1 and the resistor R2 are used as sampling resistors, and the resistor R1 and the resistor R2 adopt low-temperature-drift precision power resistors.
3. The battery protection module unit based on digital control according to claim 1, wherein: the diode D1 adopts an anti-reverse-flow diode.
4. The battery protection module unit based on digital control according to claim 1, wherein: and the MOS tube Q1 and the MOS tube Q2 adopt electronic switching tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122638864.4U CN216720952U (en) | 2021-10-29 | 2021-10-29 | Battery protection module unit based on digital control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122638864.4U CN216720952U (en) | 2021-10-29 | 2021-10-29 | Battery protection module unit based on digital control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216720952U true CN216720952U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122638864.4U Active CN216720952U (en) | 2021-10-29 | 2021-10-29 | Battery protection module unit based on digital control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216720952U (en) |
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2021
- 2021-10-29 CN CN202122638864.4U patent/CN216720952U/en active Active
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