CN111509832A - Double-battery management circuit and lamp - Google Patents
Double-battery management circuit and lamp Download PDFInfo
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- CN111509832A CN111509832A CN202010168747.3A CN202010168747A CN111509832A CN 111509832 A CN111509832 A CN 111509832A CN 202010168747 A CN202010168747 A CN 202010168747A CN 111509832 A CN111509832 A CN 111509832A
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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Abstract
The embodiment of the invention discloses a double-battery management circuit and a lamp, wherein the circuit comprises: the power supply device comprises a first power supply unit and a second power supply unit which are connected in parallel, wherein the first power supply unit is used for providing a first power supply current and a second power supply current respectively so as to realize power supply operation; the detection unit is connected with the second power supply unit and used for detecting and outputting a real-time voltage value corresponding to the second power supply unit; the judging unit is connected with the first power supply unit, the second power supply unit and the detecting unit and used for receiving the real-time voltage value, generating a corresponding control signal based on the real-time voltage value and outputting the control signal; and the charging unit is connected with the first power supply unit, the second power supply unit and the judging unit and is used for receiving the control signal and controlling the flow direction of the first power supply current and/or the second power supply current based on the control signal. In addition, the embodiment of the invention also discloses a lamp applying the double-battery management circuit. By adopting the invention, the continuous power supply control of the lamp can be realized, and the continuity of power utilization is ensured.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a double-battery management circuit and a lamp.
Background
In modern industries, the application of electricity becomes more and more important, and the loss is easily caused by the power failure for a moment, so that the electricity is known to become an indispensable component in the life of people. However, there are some devices that need to be powered by a battery, and due to the limited battery power, the operation of the devices may be stopped, for example, during the video data acquisition operation of the intelligent lighting operation system, if the continuous process cannot be maintained, the shooting may be interrupted, and unnecessary or significant losses may be caused.
Therefore, how to ensure the consistency of the operation of the electric equipment and the process of the equipment is a problem to be solved urgently in the prior art.
Disclosure of Invention
In view of this, the present invention provides a dual battery management circuit and a lamp, so as to solve the problem in the prior art that the battery cannot maintain continuous operation of the device during the replacement process, thereby ensuring continuous operation of the device and continuity of the process.
The technical scheme of the embodiment of the invention is as follows:
a dual battery management circuit comprising:
the double-battery management circuit comprises a first power supply unit and a second power supply unit which are connected in parallel, wherein the first power supply unit is used for providing first power supply current, the second power supply unit is used for providing second power supply current, and the double-battery management circuit is powered by the first power supply current and the second power supply current;
the detection unit is connected with the second power supply unit and used for detecting and outputting a real-time voltage value corresponding to the second power supply unit;
the judging unit is connected with the first power supply unit, the second power supply unit and the detecting unit and used for receiving the real-time voltage value, generating a corresponding control signal based on the real-time voltage value and outputting the control signal;
and the charging unit is connected with the judging unit and used for receiving the control signal and controlling the flow direction of the first power supply current and/or the second power supply current based on the control signal.
Optionally, the detection unit includes:
the first voltage division module is connected with the first power supply unit, and the second voltage division module is connected with the second power supply unit; and
the switch module is connected with the first voltage division module and the second voltage division module and is used for dividing voltage;
the detection unit determines the real-time voltage value based on the voltage drop size corresponding to the first voltage division module and/or the second voltage division module;
the switch module controls a connection state between the first power supply unit and the second power supply unit based on the control signal, wherein the connection state comprises a conduction state and a cut-off state.
Optionally, the determining unit includes: the first control chip and the second control chip are connected in parallel;
the first control chip is also connected with the first power supply unit, the second power supply unit and the charging unit, and the second control chip is also connected with the first power supply unit, the second power supply unit and the charging unit;
and the first control chip and the second control chip generate and output corresponding control signals based on the real-time voltage value.
Optionally, the charging unit includes an MOS transistor and a first resistor, one end of the first resistor is connected to a base of the MOS transistor, and the other end of the first resistor is connected to the switch module;
the emitter of the MOS tube is grounded, and the collector of the MOS tube is connected with the first control chip and the second control chip.
Optionally, the method further comprises: the energy storage unit is connected with the judging unit;
when the first power supply unit is powered off, the energy storage unit is used for continuously supplying power to the double-battery management circuit.
Optionally, the energy storage unit includes at least one energy storage capacitor, one end of the energy storage capacitor is grounded, and the other end of the energy storage capacitor is connected with a preset external power supply.
Optionally, the method further comprises: the first follow current unit is connected with the first power supply unit and the judging unit; and
the second follow current unit is connected with the second power supply unit and the judging unit;
the first follow current unit and the second follow current unit are used for follow current.
Optionally, the first freewheeling unit comprises a fifth capacitor and a first diode;
one end of the fifth capacitor is grounded, and the other end of the fifth capacitor is connected with the first power supply unit;
the anode of the first diode is grounded, and the cathode of the first diode is connected with the first power supply unit;
when the first power supply unit supplies power, the fifth capacitor plays a role in energy storage, and the first diode is used for continuous current in the discharging process of the fifth capacitor.
Optionally, the second freewheeling unit includes a sixth capacitor and a second diode;
one end of the sixth capacitor is grounded, and the other end of the sixth capacitor is connected with the second power supply unit;
the anode of the second diode is grounded, and the cathode of the second diode is connected with the second power supply unit;
when the second power supply unit supplies power, the sixth capacitor plays a role in energy storage, and the second diode is used for continuous current in the discharging process of the sixth capacitor.
A light fixture comprising a dual battery management circuit as described in any above.
The embodiment of the invention has the following beneficial effects:
after the double-battery management circuit and the lamp are adopted, the first power supply unit and the second power supply unit supply power to the double-battery management circuit; a detection unit connected with the second power supply unit is arranged to detect the real-time voltage value corresponding to the second power supply unit; based on the real-time voltage value, a corresponding control signal is generated through a judging unit connected with the first power supply unit, the second power supply unit and the detection unit, the judging unit transmits the control signal to the charging unit, the flow direction control of the first power supply current provided by the first power supply unit is achieved, and the flow direction control of the second power supply current provided by the second power supply unit is achieved. In the embodiment, the real-time voltage value corresponding to the second power supply unit is acquired based on the detection unit, and the corresponding control signal is generated by the judgment unit to control the first power supply unit and the second power supply unit, so that the charging operation is realized through the charging unit, and the continuous power supply of the whole double-battery management circuit can be realized by ensuring that the power can be continuously supplied through the second power supply unit under the condition that the first power supply unit is powered off, thereby avoiding the condition that the lamp cannot work when the lamp provided with double batteries is replaced under the condition that the first power supply unit is replaced; meanwhile, continuous and coherent operation of the electric equipment provided with the lamp can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic diagram of the dual battery management circuit in one embodiment;
FIG. 2 is a schematic circuit diagram of the structure of the detection unit in one embodiment;
FIG. 3 is a schematic electrical diagram of a portion of the dual battery management circuit in one embodiment;
FIG. 4 is a schematic electrical diagram of a portion of the dual battery management circuit in another embodiment;
FIG. 5 is a schematic diagram of the determining unit in one embodiment;
FIG. 6 is a schematic diagram of the dual battery management circuit in another embodiment;
FIG. 7 is a schematic circuit diagram of a portion of the dual battery management circuit in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem that in the prior art, when a power supply of a lamp is interrupted due to battery replacement, the lamp or equipment provided with the lamp cannot continuously and continuously operate, in the embodiment, a dual-battery management circuit is provided, so that continuous power supply control of the lamp is realized, and the continuity of operation is ensured.
As shown in fig. 1, the dual battery management circuit 100 includes a first power supply unit 110, a second power supply unit 120, a detection unit 130, a judgment unit 140, and a charging unit 150; the determining unit 140 is connected to the first power supply unit 110, the second power supply unit 120, the detecting unit 130, and the charging unit 140, and the detecting unit 130 is further connected to the first power supply unit 110 and the second power supply unit 120.
The first power supply unit 110 is configured to provide a first supply current, the second power supply unit 120 is configured to provide a second supply current, and the dual battery management circuit 100 supplies power through the first supply current and the second supply current, so as to implement management control on the first power supply unit 110 and the second power supply unit 120.
The detection unit 130 is configured to detect a real-time voltage value corresponding to the second power supply unit 120; in this case, the dual battery management circuit 100 uses the first power feeding unit 110 as a main battery and uses the second power feeding unit as a sub-battery. In an embodiment, the first power supply unit 110 is used to charge the second power supply unit 120, and the detection unit 130 is used to determine that the second power supply unit 120 completes the charging operation if it is detected that the real-time voltage value of the second power supply unit 120 reaches the preset value during the charging process of the second power supply unit 120.
In other embodiments, the detection unit 130 may also perform a real-time voltage value detection operation on the first power supply unit 110, that is, in the process of charging the second power supply unit 120 through the first power supply unit 110, if the detection unit 130 detects that the implementation voltage value of the first power supply unit 110 reaches the preset value, the first power supply unit 110 stops charging the second power supply unit 120, and the charging operation is completed.
When the detection unit 130 detects the corresponding real-time voltage value and outputs the real-time voltage value, the determination unit 140 receives the real-time voltage value, generates a corresponding control signal based on the real-time voltage value, and outputs the control signal; in the actual operation process, the first power supply unit 110 and the second power supply unit 120 are used for supplying power, and the judgment unit 140 is used for making corresponding judgment based on the real-time voltage value to determine the electric quantity value of the first power supply unit 110 and/or the second power supply unit 120, so that the condition that the process of a lamp or equipment using the dual-battery management circuit is discontinuous under the condition that the electric quantity of the first power supply unit 110 and/or the second power supply unit 120 is insufficient can be effectively avoided.
After the determining unit 140 generates and outputs the corresponding control signal based on the real-time voltage value, the charging unit 150 may control the flow direction of the first supply current and/or the second supply current according to the received control signal; to ensure the continuity of power supply to the dual battery management circuit 100.
The voltage of the first power supply unit 110 and/or the second power supply unit 120 is detected by the setting detection unit 130, a real-time voltage value is obtained, and the determination unit 140 can generate a corresponding control signal based on the real-time voltage value, so as to control the current flow direction of the first power supply unit 110 and/or the second power supply unit 120 through the charging unit 150, thereby ensuring that at least one of the first power supply unit 110 and the second power supply unit 120 can supply power to a lamp or a device using the dual battery management circuit 100, and ensuring the continuity and continuity of operation.
As shown in fig. 2, the detection unit 130 includes a first voltage division module 131, a switch module 132, and a second voltage division module 133; the first voltage dividing module 131 is connected to the first power supply unit 110, the second voltage dividing module 133 is connected to the second power supply unit 120, and the switch module 132 is connected to the first voltage dividing module 131 and the second voltage dividing module 133.
Specifically, the first voltage dividing module 131 and the second voltage dividing module 133 are used for dividing voltage; the detection unit 130 determines a real-time voltage value based on the voltage drop magnitude corresponding to the first voltage division module 131 and/or the second voltage division module 133; the switching module 132 controls a connection state between the first power supply unit 110 and the second power supply unit 120, which includes an on state and an off state, based on the control signal.
Illustratively, as shown in fig. 3, the first voltage division module 131 includes an eighth resistor R8, a ninth resistor R9, and an eighth capacitor C8; one end of the eighth resistor R8 is connected to the first power supply unit 110, the other end is connected to the ninth resistor R9, the other end of the ninth resistor R9 is grounded, one end of the eighth capacitor C8 is connected to the connection ends of the eighth resistor R8 and the ninth resistor R9, the connection ends of the eighth capacitor C8, the eighth resistor R8 and the ninth resistor R9 are also connected to the switch module 132, and the other end of the eighth capacitor C8 is grounded. The second voltage division module 133 includes a tenth resistor R10, an eleventh resistor R11, and a ninth capacitor C9; one end of the tenth resistor R10 is connected to the second power supply unit 120, the other end is connected to the eleventh resistor R11, the other end of the eleventh resistor R11 is grounded, one end of the ninth capacitor C9 is connected to the connection ends of the tenth resistor R10 and the eleventh resistor R11, the connection end of the ninth capacitor C9 to the connection ends of the tenth resistor R10 and the eleventh resistor R11 is further connected to the switch module 132, and the other end of the ninth capacitor C9 is grounded.
Specifically, the first voltage dividing module 131 determines the real-time voltage value corresponding to the first power supply unit 110 through the voltage division of the eighth resistor R8 and the ninth resistor R9; likewise, the second voltage division module 133 determines the real-time voltage value corresponding to the second power supply unit 120 through the tenth resistor R10 and the eleventh resistor R11. For example, assuming that the maximum voltage value that the first power supply unit 110 can reach is 4.3V and the maximum voltage value that the second power supply unit 120 can reach is 4.2V, if the detection unit 130 performs a real-time voltage value detection operation on the second power supply unit 120, the resistance value of the tenth resistor R10 may be set to 200K, the resistance value of the eleventh resistor R11 may be set to 100K, and ADC readings corresponding to the voltage division of the tenth resistor R10 and the eleventh resistor R11 are obtained through the voltage division function of the tenth resistor R10 and the eleventh resistor R11, and if the ADC reading is 1.4V, it may be determined that the second power supply unit 120 is completely charged and reaches its own maximum voltage value of 4.2V.
As shown in fig. 3, the switch module 132 includes an analog switch U3 to implement a connection state control operation between the first power supply unit 110 and the second power supply unit 120.
In other embodiments, as shown in fig. 4, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, and the eleventh resistor R11 may be further configured as a temperature-sensitive resistor to implement real-time voltage values corresponding to the first power supply unit 110 and/or the second power supply unit 120, and the real-time voltage values are obtained based on a relationship between a temperature value and a voltage drop value of the temperature-sensitive resistor, where the temperature-sensitive resistor used in this embodiment is an existing type, and the relationship between the temperature value and the voltage drop value of the temperature-sensitive resistor may be obtained according to a characteristic curve corresponding to different types of temperature-sensitive resistors, which is not described herein again.
The voltage division of the first voltage division module 131 and the voltage division of the second voltage division module 133 are performed, so that the real-time voltage values of the first power supply unit 110 and the second power supply unit 120 can be known in real time and accurately, and the voltage monitoring operation of the first power supply unit 110 and the second power supply unit 120 is realized, thereby ensuring that the continuous power supply is kept in the use process of the dual-battery management circuit 100.
In one embodiment, as shown in fig. 5, the determination unit 140 includes a first control chip 141 and a second control chip 142 connected in parallel; the first control chip 141 is further connected to the first power supply unit 110, the second power supply unit 120, and the charging unit 150, and the second control chip 142 is further connected to the first power supply unit 110, the second power supply unit 120, and the charging unit 150.
In a specific embodiment, when the detection unit 130 detects a real-time voltage value corresponding to the first power supply unit 110 and/or the second power supply unit 120, the first control chip 141 and the second control chip 142 generate and output a corresponding control signal based on the real-time voltage value.
The first control chip 141 and the second control chip 142 are chips of the same type, and the first control chip 141 is connected to corresponding pins of the second control chip 142; the first control chip 141 and the second control chip 142 are connected in parallel to serve as the determination unit 140 of the dual battery management circuit 100, that is, the determination unit 140 generates a corresponding control signal to control the current flowing direction between the first power supply unit 110 and the second power supply unit 120, so as to ensure the continuous power supply of the dual battery management circuit 100.
And the first control chip 141 and the second control chip 142 connected in parallel can effectively reduce the internal resistance of the whole dual battery management circuit 100, thereby reducing the voltage consumption of the whole dual battery management circuit 100 in the using process and improving the power utilization efficiency of the dual battery management circuit 100.
In one embodiment, the first control chip 141 and the second control chip 142 adopt AW3312 type chips, and adopt IC control based on the AW3312 type chips, so as to effectively avoid interference signals, thereby improving the management precision of the whole dual battery management circuit 100 for supplying power to the first power supply unit 110 and the second power supply unit 120, and being beneficial to improving the continuity of operation.
In one embodiment, as shown in fig. 6, the dual battery management circuit 100 further includes an energy storage unit 160, a first freewheel unit 170, and a second freewheel unit 180; the energy storage unit 160 is connected to the determination unit 140, the first freewheeling unit 170 is connected to the first power supply unit 110 and the determination unit 140, and the second freewheeling unit 180 is connected to the second power supply unit 110 and the determination unit 140.
Specifically, the energy storage unit 140 is used for storing electric energy to prevent the dual battery management circuit from being continuously powered by the energy storage unit 160 if the first power supply unit 110 needs to be replaced when the first power supply unit 110 is powered off, so that continuity and continuity of the dual battery management circuit 100 in the process of switching from the first power supply unit 110 to the second power supply unit 120 can be ensured if the second power supply unit 120 is utilized. The first freewheel unit 170 and the second freewheel unit 180 are both for freewheeling.
Based on the charging unit 150, the first control chip 141, the second control chip 142, the energy storage unit 160, the first freewheeling unit 170 and the second freewheeling unit 180 in the above-mentioned embodiments, an exemplary description may be made in conjunction with the view shown in fig. 7.
Illustratively, the charging unit 150 includes a MOS transistor Q and a first resistor R1; one end of the first resistor R1 is connected to the base B of the MOS transistor Q, and the other end of the first resistor R1 is connected to the switch module 132; the emitter E of the MOS transistor Q is grounded, and the collector C of the MOS transistor Q is connected to the first control chip 141 and the second control chip 142.
Specifically, the energy storage unit 140 is formed by a capacitor, wherein the capacitor is used as an energy storage capacitor, and the energy storage unit 140 includes at least one energy storage capacitor, one end of each energy storage capacitor is grounded, and the other end is connected to a preset external power supply.
As shown in fig. 7, if each energy storage capacitor is configured as a capacitor with a capacity of 47uF, the energy storage unit 140 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4; one end of each of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 is grounded, and the other end is connected to the first control chip 141 and the second control chip 142.
The first freewheel unit 170 includes a fifth capacitor C5 and a first diode D1, wherein one end of the fifth capacitor C5 is grounded, the other end is connected with the first power supply unit 110, the anode of the first diode D1 is grounded, and the cathode is connected with the first power supply unit 110; when the power is supplied by the first power supply unit 110, the fifth capacitor C5 plays a role of energy storage, i.e., the fifth capacitor C5 is charged; if the fifth capacitor C5 is discharged, the first diode D1 continues current, and the current generated during the discharging process of the fifth capacitor C5 flows backwards to the first power supply unit 110, so as to ensure the safety of power consumption.
The second freewheel unit 180 includes a sixth capacitor C6 and a second diode D2; one end of the sixth capacitor C6 is grounded, the other end is connected to the second power supply unit 120, the anode of the second diode D2 is grounded, and the cathode is connected to the second power supply unit 120; when power is supplied by the second power supply unit 120, the sixth capacitor C6 stores energy, that is, the sixth capacitor C6 is charged, and if the sixth capacitor C6 discharges, the second diode D2 continues current, so that the discharge current of the sixth capacitor C6 can be prevented from flowing back to the second power supply unit 120, and the safety of power utilization is ensured.
As shown in fig. 7, in the specific embodiment, when controlling the current flowing direction between the first power supply unit 110 and the second power supply unit 120, the level of the corresponding pin in the first control chip 141 and the second control chip 142 is determined to be high.
Specifically, when the EN pin is at a low level, the level of the pins connected to the first power supply unit 110 and the second power supply unit 120, namely the level of the a _ BAT pin connected to the first power supply unit 110 and the level of the B _ BAT pin connected to the second power supply unit 120, can be further determined by further determining the level of the pins connected to the first control chip 141 and the second control chip 142, so as to further determine the real-time voltage value of the first power supply unit 110 or the second power supply unit 120.
If the level of the a _ BAT pin is a high level, it indicates that the voltage value of the first power supply unit 110 is sufficient and can meet the power supply requirement of the dual battery management circuit 100, and indicates that the first power supply unit 110 does not need to be charged at this time; on the contrary, if the level of the a _ BAT pin is a low level, it indicates that the real-time voltage value of the first power supply unit 110 is low or zero, and at this time, the external power supply or the second power supply unit 120 needs to charge the first power supply unit 110, so as to ensure that the first power supply unit 110 can perform power supply operation, thereby implementing continuous operation.
Similarly, if the level of the B _ BAT pin is a high level, it indicates that the voltage value of the second power supply unit 120 is sufficient and can meet the power supply requirement of the dual battery management circuit 100, and indicates that the second power supply unit 120 does not need to be charged at this time; on the contrary, if the level of the B _ BAT pin is a low level, it indicates that the real-time voltage value of the second power supply unit 120 is low or zero, and at this time, the external power supply or the first power supply unit 120 needs to charge the battery to ensure the sufficiency of the electric quantity contained in the second power supply unit 120, and to ensure the continuous operation of the lamp or the device using the dual battery management circuit 100.
Specifically, if the EN pin is at a high level, the level state of the NO _ ID pins on the first control chip 141 and the second control chip 142 is further determined; if the NO _ ID pin is at a low level, the control of the first power supply unit 110 and the second power supply unit 120 is the same as the control of the EN pin at the low level, which is not described herein again.
If the NO _ ID pin is at a high level, the real-time voltage values of the first power supply unit 110 and the second power supply unit 120 and the levels of the pins of the first power supply unit 110 and the second power supply unit 120 connected to the first control chip 141 and the second control chip 142 are combined to control. Specifically, when the voltage value of the first power supply unit 110 is greater than the preset voltage value and the a _ BAT pin is at a high level, it indicates that the electric quantity in the first power supply unit 110 is sufficient; on the contrary, if the real-time voltage value of the first power supply unit 110 is smaller than the preset voltage value and the a _ BAT pin is at a low level, it indicates that the electric quantity in the first power supply unit 110 is insufficient, and the charging operation needs to be performed through the external power supply or the second power supply unit 120.
Similarly, when the voltage value of the second power supply unit 120 is greater than the preset voltage value and the pin B _ BAT is at a high level, it indicates that the electric quantity in the second power supply unit 120 is sufficient; on the contrary, if the real-time voltage value of the second power supply unit 120 is smaller than the preset voltage value and the B _ BAT pin is at a low level, it indicates that the electric quantity in the second power supply unit 120 is insufficient, and the charging operation needs to be performed through the external power supply or the first power supply unit 110.
Exemplarily, it is assumed that the maximum voltage value of the first power supply unit 110 is 4.3V, and the preset voltage value is 3.4V; the maximum voltage value of the second power supply unit 120 is 4.2V, and the preset voltage value is 1.2V; when the a _ BAT pin is at a high level and the real-time voltage value of the first power supply unit 110 is less than 3.4V, the first power supply unit 110 is charged at this time; similarly, when the pin B _ BAT is at a high level and the real-time voltage value of the second power supply unit 120 is less than 1.2V, the second power supply unit 120 is charged at this time.
In addition, when the EN _ CHR pin of the first and second control chips 141 and 142 is at a high level and the NO _ ID pin is at a low level, the first and second power supply units 110 and 120 may perform a charging operation therebetween.
In an embodiment, if the first power supply unit 110 is used as a main battery and the second power supply unit 120 is used as a secondary battery, when the first power supply unit 110 charges the second power supply unit 120, the control port of the MOS transistor Q is at a high level, the MOS transistor Q is turned on, meanwhile, the switch module 132 is switched to the second power supply unit 120, and the real-time voltage value corresponding to the second power supply unit 120 is obtained based on the detection unit 130, and if the real-time voltage value is smaller than the preset voltage value, the first power supply unit 110 continues to charge the second power supply unit 120 until the second power supply unit 120 reaches its own maximum voltage value, at this time, the MOS transistor Q is turned off, and the first control unit 110 stops charging the second power supply section unit 120.
The control of the first power supply unit 110 and the second power supply unit 120 is realized by the level of the corresponding pin in the first control chip 141 and the second control chip 142, because the first control chip 141 and the second control chip 142 are controlled by the IC, the control influence of the interference signal on the first control chip 141 and the second control chip 142 can be effectively reduced, which is beneficial to improving the control precision of the power supply operation of the first power supply unit 110 and the second power supply unit 120, and further, the continuous operation of the lamp or the equipment using the dual battery management circuit 100 is ensured, and the normal operation of the lamp or the equipment is ensured without operations such as startup and shutdown.
In this embodiment, a luminaire is also provided, which includes the dual battery management circuit as described above.
In another embodiment, there is also provided an apparatus comprising a dual battery management circuit as described above, or a luminaire provided with the dual battery management circuit as described above.
In addition, it should be particularly noted that, in this embodiment, a specific circuit structure and a principle of the lamp and/or the device for implementing the dual battery management are consistent with those of the dual battery management circuit, and specific reference may be made to the above contents, which is not described herein again.
After the double-battery management circuit and the lamp are adopted, the first power supply unit and the second power supply unit supply power to the double-battery management circuit; a detection unit connected with the second power supply unit is arranged to detect the real-time voltage value corresponding to the second power supply unit; based on the real-time voltage value, a corresponding control signal is generated through a judging unit connected with the first power supply unit, the second power supply unit and the detection unit, the judging unit transmits the control signal to the charging unit, the flow direction control of the first power supply current provided by the first power supply unit is achieved, and the flow direction control of the second power supply current provided by the second power supply unit is achieved. In the embodiment, the real-time voltage value corresponding to the second power supply unit is acquired based on the detection unit, and the corresponding control signal is generated by the judgment unit to control the first power supply unit and the second power supply unit, so that the charging operation is realized through the charging unit, and the continuous power supply of the whole double-battery management circuit can be realized by ensuring that the power can be continuously supplied through the second power supply unit under the condition that the first power supply unit is powered off, thereby avoiding the condition that the lamp cannot work when the lamp provided with double batteries is replaced under the condition that the first power supply unit is replaced; meanwhile, continuous and coherent operation of the electric equipment provided with the lamp can be ensured.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A dual battery management circuit, comprising:
the double-battery management circuit comprises a first power supply unit and a second power supply unit which are connected in parallel, wherein the first power supply unit is used for providing first power supply current, the second power supply unit is used for providing second power supply current, and the double-battery management circuit is powered by the first power supply current and the second power supply current;
the detection unit is connected with the second power supply unit and used for detecting and outputting a real-time voltage value corresponding to the second power supply unit;
the judging unit is connected with the first power supply unit, the second power supply unit and the detecting unit and used for receiving the real-time voltage value, generating a corresponding control signal based on the real-time voltage value and outputting the control signal;
and the charging unit is connected with the judging unit and used for receiving the control signal and controlling the flow direction of the first power supply current and/or the second power supply current based on the control signal.
2. The dual battery management circuit of claim 1, wherein the detection unit comprises:
the first voltage division module is connected with the first power supply unit, and the second voltage division module is connected with the second power supply unit; and
the switch module is connected with the first voltage division module and the second voltage division module and is used for dividing voltage;
the detection unit determines the real-time voltage value based on the voltage drop size corresponding to the first voltage division module and/or the second voltage division module;
the switch module controls a connection state between the first power supply unit and the second power supply unit based on the control signal, wherein the connection state comprises a conduction state and a cut-off state.
3. The dual battery management circuit of claim 2, wherein the judging unit comprises: the first control chip and the second control chip are connected in parallel;
the first control chip is also connected with the first power supply unit, the second power supply unit and the charging unit, and the second control chip is also connected with the first power supply unit, the second power supply unit and the charging unit;
and the first control chip and the second control chip generate and output corresponding control signals based on the real-time voltage value.
4. The dual battery management circuit according to claim 3, wherein the charging unit comprises a MOS transistor and a first resistor, one end of the first resistor is connected to a base of the MOS transistor, and the other end of the first resistor is connected to the switch module;
the emitter of the MOS tube is grounded, and the collector of the MOS tube is connected with the first control chip and the second control chip.
5. The dual battery management circuit of claim 1, further comprising: the energy storage unit is connected with the judging unit;
when the first power supply unit is powered off, the energy storage unit is used for continuously supplying power to the double-battery management circuit.
6. The dual battery management circuit according to claim 5, wherein the energy storage unit comprises at least one energy storage capacitor, one end of the energy storage capacitor is grounded, and the other end of the energy storage capacitor is connected to a predetermined external power source.
7. The dual battery management circuit of claim 1, further comprising: the first follow current unit is connected with the first power supply unit and the judging unit; and
the second follow current unit is connected with the second power supply unit and the judging unit;
the first follow current unit and the second follow current unit are used for follow current.
8. The dual battery management circuit of claim 7, wherein the first freewheel unit includes a fifth capacitor and a first diode;
one end of the fifth capacitor is grounded, and the other end of the fifth capacitor is connected with the first power supply unit;
the anode of the first diode is grounded, and the cathode of the first diode is connected with the first power supply unit;
when the first power supply unit supplies power, the fifth capacitor plays a role in energy storage, and the first diode is used for continuous current in the discharging process of the fifth capacitor.
9. The dual battery management circuit of claim 7, wherein the second freewheel unit includes a sixth capacitor and a second diode;
one end of the sixth capacitor is grounded, and the other end of the sixth capacitor is connected with the second power supply unit;
the anode of the second diode is grounded, and the cathode of the second diode is connected with the second power supply unit;
when the second power supply unit supplies power, the sixth capacitor plays a role in energy storage, and the second diode is used for continuous current in the discharging process of the sixth capacitor.
10. A luminaire comprising a dual battery management circuit as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010168747.3A CN111509832A (en) | 2020-03-12 | 2020-03-12 | Double-battery management circuit and lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010168747.3A CN111509832A (en) | 2020-03-12 | 2020-03-12 | Double-battery management circuit and lamp |
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| CN111509832A true CN111509832A (en) | 2020-08-07 |
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| CN202010168747.3A Pending CN111509832A (en) | 2020-03-12 | 2020-03-12 | Double-battery management circuit and lamp |
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| CN113555954A (en) * | 2021-08-13 | 2021-10-26 | 深圳市多为通讯科技有限公司 | Double-circuit power supply circuit capable of intelligently and automatically switching |
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Application publication date: 20200807 |