CN113162189A - Lithium battery protection chip and control circuit of integrated power MOSFET - Google Patents
Lithium battery protection chip and control circuit of integrated power MOSFET Download PDFInfo
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- CN113162189A CN113162189A CN202110506239.6A CN202110506239A CN113162189A CN 113162189 A CN113162189 A CN 113162189A CN 202110506239 A CN202110506239 A CN 202110506239A CN 113162189 A CN113162189 A CN 113162189A
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- lithium battery
- overcharge
- overdischarge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
Abstract
The application discloses a lithium battery protection chip of an integrated power MOSFET and a control circuit thereof, the chip comprises a logic control unit and at least two power MOSFET tubes integrated in the chip, the at least two power MOSFET tubes are used for knowing lithium battery charging control and discharging control, the at least two power MOSFET tubes are electrically connected with the logic control unit through known grids, the grids of the at least two power MOSFET tubes are electrically connected with a control statistical unit, the control statistical unit is used for collecting control signals of the grids of the at least two power MOSFET tubes and forming time of the control signals, the control statistical unit is used for periodically forming statistical signals of the collected control signals and corresponding time stamps and then sending the statistical signals to a control analysis unit, the control analysis unit is electrically connected with a reference standard unit, the control analysis unit calculates reference standard adjustment signals according to the statistical signals, and the control analysis unit is used for sending the reference standard adjustment signals to the reference standard unit and changing the reference standard adjustment signals A reference voltage or a reference current.
Description
Technical Field
The invention relates to the field of semiconductors, in particular to a lithium battery protection chip integrated with a power MOSFET and a control circuit.
Background
In the prior art, chinese invention application CN201610124057.1 discloses a lithium battery protection chip integrated with a power MOSFET, in which the power MOSFET includes a charging control MOSFET and a discharging control MOSFET; the source of the discharging control MOSFET serves as the cell negative terminal S1, and the source of the charging control MOSFET serves as the charging negative terminal S2; a drain electrode of the charging control MOSFET and a drain electrode of the discharging control MOSFET are connected with each other as a drain electrode common terminal D; the first input ends of an over-current comparator, a short-circuit comparator, a first over-discharge current comparator and a second over-discharge current comparator of the lithium battery protection chip of the integrated power MOSFET are connected with a source terminal S2 of the charging control MOSFET; the first input ends of the over-discharge voltage comparator and the over-charge voltage comparator are connected with the voltage divider; the voltage divider is connected with a power supply input end VDD; second input ends of the over-charge current comparator, the over-discharge voltage comparator, the over-charge voltage comparator, the short-circuit comparator, the first over-discharge current comparator and the second over-discharge current comparator are connected with the band-gap reference circuit; the power supply reset module and the oscillator module are respectively connected with the logic controller; the discharging overcurrent detection module is respectively connected with the logic controller and a source terminal S2 of the MOSFET for charging control; the grid of the MOSFET for charging control and the grid of the MOSFET for discharging control are respectively connected with a logic controller, a lithium battery protection chip of a similar integrated power MOSFET in the prior art adopts basic overcharge/overdischarge circuit control, and adopts a constant control standard for various types or service life of lithium batteries, so that the control for protecting the lithium batteries is not substantially and completely optimized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a lithium battery protection chip integrated with a power MOSFET and a control circuit.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the lithium battery protection chip is characterized by comprising a power MOSFET integrated lithium battery protection chip, a logic control unit and at least two power MOSFET tubes integrated in the chip, wherein the at least two power MOSFET tubes are used for known lithium battery charging control and discharging control, the logic control unit is electrically connected with an overcharge comparison unit and an overdischarge comparison unit respectively, the overcharge comparison unit and the overdischarge comparison unit are electrically connected with a reference unit, the reference unit is used for providing reference voltage or reference current, the at least two power MOSFET tubes are electrically connected with the logic control unit through known grids, the grids of the at least two power MOSFET tubes are electrically connected with a control statistic unit, the control statistic unit is also electrically connected with the logic control unit, a clock unit and a control analysis unit respectively, and the control statistic unit is used for collecting control signals of the grids of the at least two power MOSFET tubes and the forming time of the control signals, and the control statistical unit periodically forms a statistical signal by the acquired control signal and the corresponding timestamp and then sends the statistical signal to the control analysis unit, the control analysis unit is electrically connected with the reference unit, the control analysis unit calculates a reference adjustment signal according to the statistical signal, and the control analysis unit is used for sending the reference adjustment signal to the reference unit and changing the reference voltage or the reference current according to the reference adjustment signal.
Further, the control analysis unit and the control analysis unit calculate the reference adjustment signal by the statistical signal, and the reference adjustment signal is configured based on the periodic characteristics of the life cycle of the lithium battery:
the charging cycle and the discharging cycle of the lithium battery are different in the life cycle of the lithium battery at different stages, the value intervals of the overcharge or overdischarge reference voltage and the reference current of the lithium battery at different stages are dynamically configured, the mapping between the cycle time stamps of the life cycle of the lithium battery at different stages and the corresponding value intervals of the optimal overcharge or overdischarge reference voltage and reference current is established, the mapping between the cycle time stamps of the life cycle of the lithium battery at different stages and the periodic characteristics of the control signal is established, the statistical signal is used for reducing the time stamps of the life cycle stages of the corresponding lithium battery in the operation of the control analysis unit, then the corresponding value intervals of the optimal overcharge or overdischarge reference voltage and reference current are searched according to the time stamps of the life cycle stages of the lithium battery, and then the optimal overcharge or overdischarge reference voltage, the optimal reference current, And determining a reference adjusting signal according to the value interval of the reference current, wherein the reference adjusting signal is used for restoring the optimal overcharge or overdischarge reference voltage and the value interval of the reference current on one side of the reference unit, so that the reference unit can generate the optimal overcharge or overdischarge reference voltage and the value interval of the reference current in real time to reconfigure the overcharge comparing unit/overdischarge comparing unit.
Furthermore, the logic control unit is electrically connected with the temperature control unit.
Further, the control analysis unit and the control analysis unit calculate the reference standard adjustment signal by the statistical signal, and the reference standard adjustment signal is based on the characteristic configuration of the lithium batteries of different types:
the charging cycles and the discharging cycles of different types of lithium batteries are different, the numerical value intervals of overcharge or overdischarge reference voltages and reference currents of different types of lithium batteries are dynamically configured, mapping between the numerical value intervals of overcharge or overdischarge reference voltages and reference currents of different types of lithium batteries and corresponding optimal overcharge or overdischarge reference voltages and reference currents of the different types of lithium batteries is established, mapping between cycle time stamps of life cycles of the different types of lithium batteries and periodic characteristics of control signals of the cycle time stamps is established, the statistical signals are used for reducing the time stamps of life cycles of the corresponding lithium batteries and reducing the types of the lithium batteries in operation of a control analysis unit, then the corresponding optimal overcharge or overdischarge reference voltages and the corresponding optimal overdischarge reference voltages are firstly found according to the types of the lithium batteries, and the corresponding optimal overcharge or overdischarge reference voltages and reference currents are found according to the time stamps of the life cycles of the lithium batteries, And then, searching the corresponding optimal overcharge or overdischarge reference voltage and the corresponding optimal overcharge or overdischarge reference current value interval according to the type of the lithium battery and searching the corresponding optimal overcharge or overdischarge reference voltage and the corresponding reference current value interval according to the timestamp of the life cycle stage of the lithium battery, determining a reference adjustment signal by the intersection of the two optimal overcharge or overdischarge reference voltages and the reference current value intervals, wherein the reference adjustment signal is used for restoring the optimal overcharge or overdischarge reference voltage and the reference current value interval of the intersection on one side of a reference unit, so that the reference unit generates the optimal overcharge or overdischarge reference voltage and the reference current value interval in real time and reconfigures the overcharge comparison unit/overdischarge comparison unit.
Furthermore, the control analysis unit outputs a state output pin to the outside of the chip, and the state output pin is used for being connected with an external display circuit.
Furthermore, the control analysis unit outputs a control output pin to the outside of the chip, and the control output pin is used for being connected with an external integral control circuit.
The control circuit of the lithium battery protection chip of the integrated power MOSFET comprises a voltage transformation control circuit for providing a power supply for the lithium battery protection chip of the integrated power MOSFET and an interface circuit for connecting a lithium battery, wherein the interface circuit comprises an output circuit of the lithium battery to the lithium battery protection chip of the integrated power MOSFET and a control circuit of the lithium battery to the lithium battery, and the lithium battery protection chip of the integrated power MOSFET is electrically connected with a chip pin corresponding to the control circuit of the lithium battery at least with a power MOSFET tube.
The display circuit is connected with the status output pin and is configured to output the signal of the status output pin as a displayable optical signal.
Further, the integrated control circuit is configured to determine a reference adjustment signal to restore the value intervals of the optimal overcharge or overdischarge reference voltage and the reference current based on the intersection of the value intervals of the optimal overcharge or overdischarge reference voltage and the reference current, select a plurality of specific values as target values of the integration independent variable in Cartesian coordinates in the value intervals of the optimal overcharge or overdischarge reference voltage and the reference current, set a fixed control period, and then construct a time curve function, wherein the time curve function takes a two-dimensional quantity formed by unit time and the target values as an independent variable and takes the control influence on a reference unit as a dependent variable, the integrated control circuit is used for calculating the integral of the time curve function in the fixed control period, and selecting one or a group of two-dimensional quantities influencing the optimal control as an optimal external control parameter, and determining the duty ratio of the output control signal of the chip based on the external control parameter with the optimal two-dimensional quantity to obtain an optimal control mode.
The invention has the advantages that the control statistical unit of the application collects the control signals of the grid electrodes of at least two power mosfet tubes and the forming time of the control signals, and the control statistical unit regularly forms the statistical signal with the collected control signal and the corresponding timestamp and then sends the statistical signal to the control analysis unit, the control analysis unit calculates a reference adjustment signal according to the statistical signal, the control analysis unit sends the reference adjustment signal to the reference unit and changes the reference voltage or the reference current according to the reference adjustment signal, the changed reference voltage or the changed reference current can be configured for the overcharge comparison unit or the overdischarge comparison unit again, therefore, the unchanged control standard can be changed, the control on the lithium battery protection can be optimized, and the control on the lithium battery protection can be optimized specifically aiming at lithium batteries of various types or service life points.
Drawings
Fig. 1 is a block diagram of a chip circuit composition according to an embodiment of the present application.
The invention is further illustrated with reference to the following figures and examples.
Detailed Description
In specific implementation, the lithium battery protection chip of the integrated power MOSFET of the present application is shown in fig. 1, and includes a logic control unit and at least two power MOSFETs integrated in the chip, where the at least two power MOSFETs are used for knowing lithium battery charging control and discharging control, the logic control unit is electrically connected to an overcharge comparison unit and an overdischarge comparison unit, respectively, the overcharge comparison unit and the overdischarge comparison unit are electrically connected to a reference unit, the reference unit is used for providing a reference voltage or a reference current, the at least two power MOSFETs are electrically connected to the logic control unit by using known gates, the gates of the at least two power MOSFETs are electrically connected to a control statistics unit, the control statistics unit is electrically connected to the logic control unit, a clock unit and a control analysis unit, and the control statistics unit is used for collecting control signals and control signals of the gates of the at least two power MOSFETs and controlling the control statistics unit The control and analysis unit is electrically connected with the reference unit, the control and analysis unit calculates a reference adjustment signal according to the statistical signal, and the control and analysis unit is used for sending the reference adjustment signal to the reference unit and changing reference voltage or reference current according to the reference adjustment signal; the logic control unit is also electrically connected with the temperature control unit. In the implementation, the control statistical unit collects control signals of the grid electrodes of at least two power mosfets and the forming time of the control signals, the control statistical unit forms the collected control signals and corresponding timestamps into statistical signals at regular intervals and then sends the statistical signals to the control analysis unit, the control analysis unit calculates reference adjusting signals according to the statistical signals, the control analysis unit sends the reference adjusting signals to the reference unit and changes reference voltage or reference current through the reference adjusting signals, and the changed reference voltage or reference current can be configured for the overcharge comparison unit or the overdischarge comparison unit again, so that a constant control standard can be changed, and the control on the protection of the lithium battery is optimized.
In a better implementation, the control analysis unit and the control analysis unit calculate the reference adjustment signal by the statistical signal, and the reference adjustment signal is configured based on the periodic characteristics of the life cycle of the lithium battery:
the charging cycle and the discharging cycle of the lithium battery are different in the life cycle of the lithium battery at different stages, the value intervals of the overcharge or overdischarge reference voltage and the reference current of the lithium battery at different stages are dynamically configured, the mapping between the cycle time stamps of the life cycle of the lithium battery at different stages and the corresponding value intervals of the optimal overcharge or overdischarge reference voltage and reference current is established, the mapping between the cycle time stamps of the life cycle of the lithium battery at different stages and the periodic characteristics of the control signal is established, the statistical signal is used for reducing the time stamps of the life cycle stages of the corresponding lithium battery in the operation of the control analysis unit, then the corresponding value intervals of the optimal overcharge or overdischarge reference voltage and reference current are searched according to the time stamps of the life cycle stages of the lithium battery, and then the optimal overcharge or overdischarge reference voltage, the optimal reference current, Determining a reference adjusting signal in the numerical range of the reference current, wherein the reference adjusting signal is used for restoring the optimal overcharge or overdischarge reference voltage and the numerical range of the reference current on one side of a reference unit so that the reference unit can generate the optimal overcharge or overdischarge reference voltage and the numerical range of the reference current in real time to reconfigure an overcharge comparing unit/an overdischarge comparing unit;
in implementation, the statistical signal restores a timestamp of a life cycle stage of a corresponding lithium battery, then a corresponding optimal overcharge or overdischarge reference voltage and reference current value interval is found according to the timestamp of the life cycle stage of the lithium battery, then a reference adjusting signal is determined according to the optimal overcharge or overdischarge reference voltage and reference current value interval, and the reference adjusting signal restores the optimal overcharge or overdischarge reference voltage and reference current value interval on one side of a reference unit, so that the reference unit generates the optimal overcharge or overdischarge reference voltage and reference current value interval in real time to reconfigure the overcharge comparing unit/overdischarge comparing unit, and therefore different control standards are adopted for the lithium batteries at different life points, and control over protection of the lithium batteries is optimized.
The control analysis unit and the control analysis unit calculate the reference standard adjustment signal by the statistical signal, and the reference standard adjustment signal is based on the characteristic configuration of lithium batteries of different types:
the charging cycles and the discharging cycles of different types of lithium batteries are different, the numerical value intervals of overcharge or overdischarge reference voltages and reference currents of different types of lithium batteries are dynamically configured, mapping between the numerical value intervals of overcharge or overdischarge reference voltages and reference currents of different types of lithium batteries and corresponding optimal overcharge or overdischarge reference voltages and reference currents of the different types of lithium batteries is established, mapping between cycle time stamps of life cycles of the different types of lithium batteries and periodic characteristics of control signals of the cycle time stamps is established, the statistical signals are used for reducing the time stamps of life cycles of the corresponding lithium batteries and reducing the types of the lithium batteries in operation of a control analysis unit, then the corresponding optimal overcharge or overdischarge reference voltages and the corresponding optimal overdischarge reference voltages are firstly found according to the types of the lithium batteries, and the corresponding optimal overcharge or overdischarge reference voltages and reference currents are found according to the time stamps of the life cycles of the lithium batteries, The method comprises the steps of obtaining a reference current value interval, and determining a reference adjusting signal according to an intersection of two optimal overcharge or overdischarge reference voltages and reference current value intervals, wherein the reference adjusting signal is used for restoring the optimal overcharge or overdischarge reference voltages and the reference current value intervals of the intersection on one side of a reference unit so that the reference unit can generate the optimal overcharge or overdischarge reference voltages in real time and the reference current value intervals are reconfigured for an overcharge comparing unit/an overdischarge comparing unit;
the statistical signal is used for restoring a timestamp of a life cycle stage of a corresponding lithium battery, restoring the type of the lithium battery, searching a corresponding optimal overcharge or overdischarge reference voltage and reference current value interval according to the timestamp of the life cycle stage of the lithium battery, determining a reference adjusting signal according to an intersection of the two optimal overcharge or overdischarge reference voltages and reference current value intervals, searching the corresponding optimal overcharge or overdischarge reference voltage and reference current value interval according to the type of the lithium battery, and searching the corresponding optimal overcharge or overdischarge reference voltage and reference current value interval according to the timestamp of the life cycle stage of the lithium battery, determining a reference adjusting signal on one side of a reference unit, restoring the optimal overcharge or overdischarge reference voltage and reference current value interval of the intersection, The reference unit generates the optimal overcharge or overdischarge reference voltage in real time, and the reference current value interval reconfigures the overcharge comparison unit/the overdischarge comparison unit; by the method, different control standards are adopted for lithium batteries of different types and service life points, and the control on the protection of the lithium batteries is optimized.
Based on above-mentioned chip, this application integrated power MOSFET's lithium cell protection chip's control circuit includes the vary voltage control circuit who provides the power to integrated power MOSFET's lithium cell protection chip, connects the interface circuit of lithium cell, interface circuit include the lithium cell to integrated power MOSFET's lithium cell protection chip's output circuit, integrated power MOSFET's lithium cell protection chip to the control circuit of lithium cell, integrated power MOSFET's lithium cell protection chip is at least with the chip pin electric connection that power MOSFET pipe corresponds to the control circuit of lithium cell.
For the above chip embodiment, the control analysis unit outputs a status output pin to the outside of the chip, and the status output pin is used for connecting an external display circuit; the corresponding control circuit also comprises a display circuit connected with the state output pin, and the display circuit is configured to output the signal of the state output pin into a displayable optical signal, so that the actual use condition of the battery can be displayed at a user terminal.
For the above chip embodiment, the control analysis unit outputs a control output pin to the outside of the chip, and the control output pin is used for connecting an external integral control circuit; the corresponding control circuit also comprises an integral control circuit, the integral control circuit is configured to determine a reference adjusting signal to restore the numerical value intervals of the optimal overcharge or overdischarge reference voltage and the reference current based on the intersection of the numerical value intervals of the optimal overcharge or overdischarge reference voltage and the reference current, select a plurality of specific numerical values in the numerical value intervals of the optimal overcharge or overdischarge reference voltage and the reference current as target numerical values of integral independent variables in Cartesian coordinates, set a fixed control period, and then construct a time curve function, the time curve function takes a two-dimensional quantity formed by unit time and the target numerical values as an independent variable and takes control influence on a reference unit as a dependent variable, the integral control circuit is used for calculating the integral of the time curve function in the fixed control period, and selects one or a group of two-dimensional quantities influencing the optimal integral as an optimal external control parameter, and determining the duty ratio of the output control signal of the chip based on the external control parameter with the optimal two-dimensional quantity to obtain an optimal control mode, and further optimizing the overall control through external integral control in implementation.
Claims (9)
1. A lithium battery protection chip integrated with a power MOSFET is characterized by comprising a logic control unit and at least two power MOSFET tubes integrated in the chip, wherein the at least two power MOSFET tubes are used for knowing the charging control and the discharging control of a lithium battery, the logic control unit is electrically connected with an overcharge comparison unit and an overdischarge comparison unit respectively, the overcharge comparison unit and the overdischarge comparison unit are electrically connected with a reference unit, the reference unit is used for providing reference voltage or reference current, the at least two power MOSFET tubes are electrically connected with the logic control unit through known grids, the grids of the at least two power MOSFET tubes are electrically connected with a control statistic unit, the control statistic unit is also electrically connected with the logic control unit, a clock unit and a control analysis unit respectively, and the control statistic unit is used for collecting control signals of the grids of the at least two power MOSFET tubes and the forming time of the control signals And the control statistical unit periodically forms a statistical signal by the acquired control signal and the corresponding timestamp and then sends the statistical signal to the control analysis unit, the control analysis unit is electrically connected with the reference unit, the control analysis unit calculates a reference adjustment signal according to the statistical signal, and the control analysis unit is used for sending the reference adjustment signal to the reference unit and changing the reference voltage or the reference current according to the reference adjustment signal.
2. The lithium battery protection chip of claim 1, wherein the control analysis unit and the control analysis unit calculate the reference adjustment signal based on the statistical signal, and are configured based on the periodic characteristics of the life cycle of the lithium battery:
the charging cycle and the discharging cycle of the lithium battery are different in the life cycle of the lithium battery at different stages, the value intervals of the overcharge or overdischarge reference voltage and the reference current of the lithium battery at different stages are dynamically configured, the mapping between the cycle time stamps of the life cycle of the lithium battery at different stages and the corresponding value intervals of the optimal overcharge or overdischarge reference voltage and reference current is established, the mapping between the cycle time stamps of the life cycle of the lithium battery at different stages and the periodic characteristics of the control signal is established, the statistical signal is used for reducing the time stamps of the life cycle stages of the corresponding lithium battery in the operation of the control analysis unit, then the corresponding value intervals of the optimal overcharge or overdischarge reference voltage and reference current are searched according to the time stamps of the life cycle stages of the lithium battery, and then the optimal overcharge or overdischarge reference voltage, the optimal reference current, And determining a reference adjusting signal according to the value interval of the reference current, wherein the reference adjusting signal is used for restoring the optimal overcharge or overdischarge reference voltage and the value interval of the reference current on one side of the reference unit, so that the reference unit can generate the optimal overcharge or overdischarge reference voltage and the value interval of the reference current in real time to reconfigure the overcharge comparing unit/overdischarge comparing unit.
3. The lithium battery protection chip of claim 1, wherein the logic control unit is further electrically connected to the temperature control unit.
4. The lithium battery protection chip of claim 1, wherein the control analysis unit and the control analysis unit calculate the reference adjustment signal based on the statistical signal, and the reference adjustment signal is configured based on characteristics of different types of lithium batteries:
the charging cycles and the discharging cycles of different types of lithium batteries are different, the numerical value intervals of overcharge or overdischarge reference voltages and reference currents of different types of lithium batteries are dynamically configured, mapping between the numerical value intervals of overcharge or overdischarge reference voltages and reference currents of different types of lithium batteries and corresponding optimal overcharge or overdischarge reference voltages and reference currents of the different types of lithium batteries is established, mapping between cycle time stamps of life cycles of the different types of lithium batteries and periodic characteristics of control signals of the cycle time stamps is established, the statistical signals are used for reducing the time stamps of life cycles of the corresponding lithium batteries and reducing the types of the lithium batteries in operation of a control analysis unit, then the corresponding optimal overcharge or overdischarge reference voltages and the corresponding optimal overdischarge reference voltages are firstly found according to the types of the lithium batteries, and the corresponding optimal overcharge or overdischarge reference voltages and reference currents are found according to the time stamps of the life cycles of the lithium batteries, And then, searching the corresponding optimal overcharge or overdischarge reference voltage and the corresponding optimal overcharge or overdischarge reference current value interval according to the type of the lithium battery and searching the corresponding optimal overcharge or overdischarge reference voltage and the corresponding reference current value interval according to the timestamp of the life cycle stage of the lithium battery, determining a reference adjustment signal by the intersection of the two optimal overcharge or overdischarge reference voltages and the reference current value intervals, wherein the reference adjustment signal is used for restoring the optimal overcharge or overdischarge reference voltage and the reference current value interval of the intersection on one side of a reference unit, so that the reference unit generates the optimal overcharge or overdischarge reference voltage and the reference current value interval in real time and reconfigures the overcharge comparison unit/overdischarge comparison unit.
5. The lithium battery protection chip of claim 1, wherein the control and analysis unit outputs a status output pin to an off-chip device, and the status output pin is used for connecting to an external display circuit.
6. The chip and the control circuit for lithium battery protection of integrated power MOSFET as claimed in claim 1, wherein the control analysis unit outputs a control output pin to the outside of the chip, and the control output pin is used to connect to an external integral control circuit.
7. The control circuit of claim 1, comprising a voltage transformation control circuit for providing power to the lithium battery protection chip of the integrated power MOSFET, and an interface circuit connected to the lithium battery, wherein the interface circuit comprises an output circuit of the lithium battery to the lithium battery protection chip of the integrated power MOSFET, and a control circuit of the lithium battery protection chip of the integrated power MOSFET to the lithium battery, and the control circuit of the lithium battery protection chip of the integrated power MOSFET to the lithium battery is electrically connected to at least a chip pin corresponding to the power MOSFET.
8. The control circuit of the lithium battery protection chip of the integrated power MOSFET as recited in claim 5, further comprising a display circuit connected to the status output pin, wherein the display circuit is configured to output a signal from the status output pin as a displayable optical signal.
9. The control circuit of claim 6, further comprising an integral control circuit configured to determine a reference adjustment signal based on an intersection of the value ranges of the optimal overcharge or overdischarge reference voltage and the reference current to restore the value ranges of the optimal overcharge or overdischarge reference voltage and the reference current, and select a plurality of specific values as target values of the integral independent variable in Cartesian coordinates in the value ranges of the optimal overcharge or overdischarge reference voltage and the reference current, set a fixed control period, and then construct a time curve function using a two-dimensional quantity formed by the unit time and the target values as an independent variable and using a control influence on the reference cell as a dependent variable, the integral control circuit being configured to calculate an integral of the time curve function in the fixed control period, and selecting one or a group of two-dimensional quantities corresponding to the integral with the optimal control influence as the optimal external control parameter, and determining the duty ratio of the output control signal of the chip based on the optimal external control parameter of the two-dimensional quantities to obtain the optimal control mode.
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