CN111934416A - Uninterrupted power supply battery hot plug device - Google Patents
Uninterrupted power supply battery hot plug device Download PDFInfo
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- CN111934416A CN111934416A CN202010772844.3A CN202010772844A CN111934416A CN 111934416 A CN111934416 A CN 111934416A CN 202010772844 A CN202010772844 A CN 202010772844A CN 111934416 A CN111934416 A CN 111934416A
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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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- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
Abstract
The application provides a hot plug device for an uninterruptible power supply battery, which comprises a main battery; a sub-battery; a main battery discharge circuit including a first DC/DC converter and a first ideal diode; a sub-battery discharge circuit including a second DC/DC converter and a second ideal diode; the main battery discharging circuit and the auxiliary battery discharging circuit are connected with a power supply network, so that the main battery and the auxiliary battery supply power to the power supply network; the first DC/DC converter output voltage is higher than the second DC/DC converter output voltage to put the second ideal diode in an off state to block the current of the secondary battery from flowing to the power supply network until the output voltage of the primary battery is zero to put the second ideal diode in an on state, the secondary battery current flowing to the power supply network. According to the embodiment of the application, parallel discharge of the main battery and the auxiliary battery is realized, voltage and current spikes are avoided, and switching power supply response time is shortened.
Description
Technical Field
The application relates to the technical field of charging and discharging of power supply batteries, in particular to a hot plug device for an uninterruptible power supply battery.
Background
With the continuous improvement of the processing capability and the continuous enrichment of functions of mobile terminals and high-power-consumption portable devices, the power consumption of terminal products is also increasing. Current terminal equipment only possesses a battery usually, can't continue work when battery power is lower, and the time of endurance is shorter, and some equipment terminals though can charge through battery charging outfits such as treasured that charges, but the treasured that charges has certain volume and weight heavier, is unfavorable for carrying, brings a great deal of inconvenience for the user.
In the conventional dual battery system, the main battery and the auxiliary battery of the portable device are frequently switched to discharge, so that voltage and current spikes are probabilistically generated, and the system stability is affected. When the main battery is replaced, the time for pulling and inserting the battery is uncertain and random, the supplementary access time point of the auxiliary battery is mostly in a software control mode at present, the auxiliary battery is opened for power supplement after the main battery is detected to be pulled down, the power supply response time is too long due to the situation, the system is prone to power failure, and the normal use of terminals such as a mobile phone and a notebook computer is affected.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the application provides the uninterrupted power supply battery hot plugging device, and the problems that voltage and current spikes are generated due to the switching discharge probability of double batteries, the power supply response time of main batteries is too long, the system is prone to power failure and the like are solved.
The embodiment of the application provides a device for hot plug of an uninterruptible power supply battery, which comprises: a main battery and a sub-battery; a main battery discharge circuit including a first DC/DC converter and a first ideal diode; one end of the first DC/DC voltage device is connected with the main battery, and the other end of the first DC/DC voltage device is connected with the first ideal diode; a sub-battery discharge circuit including a second DC/DC converter and a second ideal diode; one end of the second DC/DC voltage device is connected with the auxiliary battery, and the other end of the second DC/DC voltage device is connected with the second ideal diode; the main battery discharging circuit and the auxiliary battery discharging circuit are connected with a power supply network, so that the main battery and the auxiliary battery supply power to the power supply network; the first DC/DC converter output voltage is higher than the second DC/DC converter output voltage to put the second ideal diode in an off state to block the current of the secondary battery from flowing to the power supply network until the output voltage of the primary battery is zero to put the second transistor in an on state, the secondary battery current flowing to the power supply network.
The existing double-battery switching power supply technology is easy to generate voltage and current spikes due to the fact that voltage and current are greatly changed in a short time when two batteries are frequently switched, so that the stability and safety of a system are affected, and the system is prone to power failure due to the fact that power supply response time caused by battery switching power supply is too long. The embodiment of the application converts the output voltage of the main battery and the auxiliary battery into a constant voltage value through the DC/DC converter, so that the DC/DC output voltage of the main battery side is slightly higher than the DC/DC output voltage of the auxiliary battery side, and then an approximate ideal diode is used for blocking a current path of the auxiliary battery in a normal working state, on the basis of parallel discharging of the main battery and the auxiliary battery, the electric quantity of the main battery is preferentially consumed, and in the moment of exhaustion or disassembly of the electric quantity of the main battery, the instant positive bias of the voltage can enable a discharging circuit of the auxiliary battery to be instantly conducted, the auxiliary battery can continue to supply power for a terminal in a very short time, the voltage change is extremely small, the voltage current spike cannot be generated, and the problem that the battery can be switched can be solved.
In one embodiment, the apparatus further comprises: a charging chip; the first load switch is used for controlling the current of the charging chip for charging the main battery; the second load switch is used for controlling the charging current of the secondary battery by the charging chip; the charging chip is used for detecting the voltages of the main battery and the auxiliary battery, and controlling the working state of a load switch corresponding to a high-voltage battery in the main battery and the auxiliary battery under the condition that the detected voltages of the main battery and the auxiliary battery are different, so as to charge the battery corresponding to the low voltage; and charging the main battery and the sub-battery in parallel when it is detected that the voltage of the main battery and the voltage of the sub-battery are the same.
The existing double-battery switching power supply technology is also used for switching charging when the batteries are charged, the auxiliary battery is charged after the main battery is fully charged, and voltage and current spikes are easily formed in the moment of switching charging.
In one embodiment, the first DC/DC converter includes a first resistor R1 and a second resistor R2, and the second DC/DC converter includes a sixth resistor R6 and a seventh resistor R7; the ratio of the resistance of the sixth resistor R6 to the resistance of the seventh resistor R7 is smaller than the ratio of the resistance of the first resistor R1 to the resistance of the second resistor R2.
In one embodiment, the first ideal diode is used for blocking the main battery current path when the voltage is reversely biased and conducting the main battery current path when the voltage is positively biased; and the second ideal diode is used for blocking the current path of the auxiliary battery when the voltage is reversely biased and conducting the current path of the auxiliary battery when the voltage is positively biased.
In one embodiment, the first ideal diode specifically includes a first driving chip IC1002, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, and a first transistor M1; wherein: the source of the first transistor M1 is connected to the seventh pin of the first driver IC1002, and is connected to the first pin of the first driver IC through a fifth resistor R5; the gate of the first transistor M1 is connected to the fifth pin of the first driver chip IC1002, a fourteenth capacitor C14 is connected in parallel between the source and the drain of the first transistor M1, and the drain of the first transistor M1 is connected to the power supply network; the first pin of the first driver chip IC1002 is connected to the sixth pin of the first driver chip through a third resistor R3, and is grounded through a tenth capacitor C10; the sixth pin of the first driving chip is grounded through a thirteenth capacitor C10, and the second pin of the first driving chip is connected with the third pin and the fourth pin of the first driving chip through a fourth resistor R4; the eighth pin of the first driving chip is connected to the first DC/DC converter through an eleventh capacitor C11, and the seventh pin of the first driving chip is grounded through a twelfth capacitor C12.
In one embodiment, the second ideal diode specifically includes a second driver chip IC2002, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a twenty-fourth capacitor C24, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, and a second transistor M2; wherein: the source of the second transistor M2 is connected to the seventh pin of the second driver IC2002, and is connected to the first pin of the first driver IC through a tenth resistor R10; the grid electrode of the second transistor is connected with the fifth pin of the first driving chip IC2002, a twenty-eighth capacitor C28 is connected between the source electrode and the drain electrode of the second transistor in parallel, and the drain electrode of the second transistor is connected with the power supply network; the first pin of the second driver chip IC2002 is connected to the sixth pin of the second driver chip through an eighth resistor R8, and is grounded through a twenty-four capacitor C24; a sixth pin of the second driving chip is grounded through a twenty-seventh capacitor C27; the second pin of the second driving chip is connected with the third pin and the fourth pin through a ninth resistor R9; the eighth pin of the second driving chip is connected with the second DC/DC converter through a twenty-fifth capacitor C25; and the seventh pin of the second driving chip is grounded through a twenty-sixth capacitor C26.
In one embodiment, the first load switch further comprises a thirteenth resistor R13, the second load switch further comprises a twentieth resistor R20; the resistance value of the thirteenth resistor R13 is smaller than that of the twentieth resistor R20.
In one embodiment, the charging chip is further used for reading one or more parameters of voltage, charging current and temperature of the main battery and the auxiliary battery in the charging process of the main battery and the auxiliary battery; and detecting the uninterrupted power supply battery hot plug device according to the one or more parameters, and stopping the device under the preset condition that any one parameter reaches the setting.
In one embodiment, the apparatus further comprises: the electric quantity meter is used for monitoring one or more parameters of discharge voltage, output current and temperature of the main battery and the auxiliary battery in real time in the discharge process of the main battery and the auxiliary battery, detecting the uninterrupted power supply battery hot plug device according to the one or more parameters, and stopping the device when any parameter reaches a preset condition.
The embodiment of the application provides a hot plug device for an uninterruptible power supply battery, which combines a DC/DC voltage regulation technology and an ideal diode blocking technology to be applied to a double-battery charging circuit, the ideal diode is controlled to be cut off and conducted through the tiny voltage difference of a main battery and an auxiliary battery to realize the passive analog switching of the main battery and the auxiliary battery, the main battery and the auxiliary battery are not required to be controlled to be switched through control logic and software, and the auxiliary battery is in a discharging state and has a voltage slightly smaller than that of the main battery side, so that the voltage change is not large when the auxiliary battery replaces the main battery to supply power, the current can be rapidly supplemented, the voltage and current spike can be avoided, and the power supply response time can be shortened.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a hot plug device for an uninterruptible power supply battery according to an embodiment of the present disclosure;
FIG. 2 is a main battery discharge circuit diagram provided in an embodiment of the present application;
FIG. 3 is a circuit diagram of a sub-battery discharge circuit according to an embodiment of the present disclosure;
fig. 4 is a circuit diagram of a first load switch provided in an embodiment of the present application;
fig. 5 is a circuit diagram of a second load switch according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
The embodiment of the application provides a method and a device for hot plug of an uninterruptible power supply battery, and the technical scheme provided by the embodiment of the application is explained in detail through the attached drawings.
Fig. 1 is a schematic structural diagram of a hot plug device for an uninterruptible power supply battery according to an embodiment of the present disclosure.
As shown in fig. 1, the uninterruptible power supply battery hot plug device mainly includes a main battery 130, a sub-battery 170, a first DC/DC converter 140, a second DC/DC converter 180, a first ideal diode 150, and a second ideal diode 190.
Specifically, the main battery 130 and the sub-battery 170 are used to supply power to a VBATT power supply network, where the VBATT power supply network includes terminal devices such as a mobile phone, a tablet, and a notebook that use the battery power supply network.
One end of the first DC/DC converter 140 is connected to the main battery 130, and the other end of the first DC/DC converter 140 is connected to the first ideal diode 150. One end of the second DC/DC converter 180 is connected to the sub-battery 170, and the other end of the second DC/DC converter 180 is connected to a second ideal diode 190.
The first DC/DC converter 140 serves to make the voltage output from the main battery to the VBATT supply network a constant voltage value, and the second DC/DC converter 180 serves to make the voltage output from the sub-battery to the VBATT supply network a constant voltage value. The first ideal diode 150 is used to block the main battery current path when the voltages on both sides are reversely biased and to conduct the main battery current path when the voltages on both sides are positively biased, and the second ideal diode 190 is used to block the auxiliary battery current path when the voltages on both sides are reversely biased and to conduct the auxiliary battery current path when the voltages on both sides are positively biased.
The specific functions and connection modes of the first DC/DC converter, the second DC/DC converter and the first ideal diode and the second ideal diode refer to the detailed descriptions of the figures 2 and 3 and the corresponding parts.
The output voltage of the first DC/DC converter 150 is slightly higher than the output voltage of the second DC/DC converter 180, and in the embodiment of the present application, the main battery 130 and the auxiliary battery 170 are controlled to discharge respectively by turning on and off the first ideal diode and the second ideal diode, so as to implement parallel discharge.
In one embodiment, the main battery 130 and the auxiliary battery 170 release electric energy simultaneously under the condition that the uninterruptible power supply battery hot plug device works normally. The voltage of the main battery 130 is output as a constant voltage value through the first DC/DC converter 140. The voltage of the sub-battery 170 is output through the second DC/DC converter 180 to a voltage value slightly smaller than the output voltage of the first DC/DC converter 140, and the voltage output from the sub-battery 170 to the VBATT supply network is also a constant voltage value. At this time, the anode voltage of the first ideal diode 150 is higher than the cathode voltage, the voltage across the first ideal diode 150 is a forward bias voltage, and the current flows to the VBATT supply network through the first ideal diode 150. At this time, the anode voltage of the second ideal diode 190 is lower than the cathode voltage, and the voltages on both sides are in a reverse bias state. The path from the secondary battery 170 to the VBATT supply network is therefore blocked, and the secondary battery 170, although at voltage, cannot output current to the VBATT supply network. This state is that the main battery 130 and the sub-battery 170 are charged in parallel, and the current of the sub-battery 170 is blocked by the second ideal diode 190.
In an application scenario, the output constant voltage of the first DC/DC converter 140 is 10V, and the output constant voltage of the second DC/DC converter 180 is 8V, so that the anode voltage of the first ideal diode 150 is 10V and the cathode voltage is 8V. The first ideal diode 150 is conducting and the main battery 130 can normally supply the VBATT supply network. The anode voltage of the second ideal diode 190 is 8V, the cathode voltage is 10V, and the second ideal diode 190 is reversely biased to be turned off, which is equivalent to the switch being turned off. At this time, the current output from the sub-battery 170 is blocked by the second ideal diode 190 and cannot be delivered to the VBATT supply network.
The ideal diode can prevent the current of the main battery and the auxiliary battery from flowing backwards due to the voltage difference, and can block the current path of the auxiliary battery 170 during normal operation, thereby saving the electric quantity of the auxiliary battery 170 and preferentially consuming the electric quantity of the main battery 130.
In one embodiment, the main battery 130 is detachably installed in the battery installation site, so that the spare battery can be replaced in time after the main battery is used up in a state without a charging environment. The auxiliary battery 170 is not detachable, so that the electric quantity can be supplemented in time after the electric quantity of the main battery is exhausted, the internal space of the mobile terminal can be saved, and the mobile terminal is lighter and thinner and is convenient to carry.
In one embodiment, if the main battery 130 is exhausted or the main battery 130 is detached, and the voltage of the main battery 130 drops to zero, the first DC/DC converter 140 loses the input source. The output voltage of the first DC/DC converter 140 becomes zero. At this time, the anode voltage of the first ideal diode 150 is suddenly zero and is lower than the cathode voltage. The first ideal diode 150 changes from the on state to the off state. And the anode voltage of the second ideal diode 190 is higher than the cathode voltage, the second ideal diode 190 is changed from the off state to the on state, and the current of the secondary battery 170 flows to the VBATT power supply network. Since the first ideal diode 150 is off, current does not flow back into the main battery discharge circuit.
For example, the output constant voltage of the first DC/DC converter 140 is 10V, and the output constant voltage of the second DC/DC converter 180 is 8V. At the moment when the main battery 130 is exhausted or detached, the anode voltage of the first ideal diode 150 is suddenly changed to 0V, and the cathode voltage is still 8V. At this point the first ideal diode 150 changes from on to off. The anode voltage of the second ideal diode 190 is 8V, the cathode voltage is suddenly changed to 0V, at this time, the second ideal diode 190 is changed from the cut-off state to the conducting state, the current of the secondary battery 170 flows to the VBATT power supply network, and the VBATT power supply network is continuously supplied with power. In this case, the battery supply voltage is changed from 10V to 8V, the voltage change is not large, and the probability of voltage and current spikes is extremely low. The switching process is passive switching caused by that the output voltage of the first DC/DC converter 140 is suddenly changed to zero, software or logic control is not needed, and the time for responding to power supply is shortened greatly.
Before the voltage of the main battery 130 drops to zero, the output voltage of the first DC/DC converter 140 is always a constant value, and the sub-battery 170 side similarly outputs a constant voltage value. For example, the voltage of the main battery 130 has dropped to 2V by 20V, but the output voltage of the first DC/DC converter 140 is still 10V.
In addition, in case of a need to replace the main battery 130, the first DC/DC converter 140 regains the input source at the instant of installing a new main battery to the main battery installation site, and the voltage is restored to the set constant voltage value. The first ideal diode 150 is turned on, the second ideal diode 190 is turned off, and the uninterruptible power supply battery hot plug device is switched to the state of supplying power to the main battery 130 and cutting off the current of the auxiliary battery 170.
It should be noted that the above-mentioned ideal diode is a circuit formed by combining a power MOS transistor and a driver chip, has extremely low voltage loss, and can realize a function similar to that of an ideal diode, and therefore, in the embodiment of the present application, this part of the circuit is described by an ideal diode.
The main battery 130 and the sub-battery 170 respectively realize the above-described specific functions by a main battery discharge circuit and a sub-battery discharge circuit, which will be specifically explained below by fig. 2 and 3.
Fig. 2 is a main battery discharge circuit diagram provided in an embodiment of the present application, and fig. 3 is a sub battery discharge circuit diagram provided in an embodiment of the present application.
As shown in fig. 2, the main battery discharge circuit includes a first DC/DC converter 140 and a first ideal diode 150.
The first DC/DC converter 140 includes a chip IC1001, a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, and an inductor L1.
Specifically, the first pin of the chip IC1001 is grounded, the third pin is connected to the positive electrode of the main battery 130, and is grounded through the capacitor C1, the capacitor C2, the capacitor C3, and the capacitor C4, respectively; the sixth pin of the chip IC1001 is connected to the second pin through a capacitor C5, the second pin is connected to the inductor L1, and is grounded through a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; inductor L1 is connected to the fourth pin through resistor R1 and to ground through resistor R2.
In one embodiment, the chip IC1001 is a DC/DC switching constant voltage chip for DC/DC constant voltage conversion, model number TPS 564201.
The main battery 130 converts the voltage into a constant voltage through the first DC/DC converter 140, and the output voltage of the first DC/DC converter 140 is determined by the ratio of the resistance of the resistor R1 to the resistance of the resistor R2. The calculation formula of the output voltage of the first DC/DC converter 140 is derived from a large amount of experimental data as follows:
wherein, VOUT1R1 is the resistance of the resistor R1, and R2 is the resistance of the resistor R2, which is the output voltage of the first DC/DC converter 140.
As shown in fig. 3, the sub-battery discharge circuit mainly includes a second DC/DC converter 180 and a second ideal diode 190.
The second DC/DC converter 180 includes a chip IC2001, a resistor R6, a resistor R7, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, and an inductor L2.
Specifically, the first pin of the chip IC2001 is grounded, the third pin is connected to the positive electrode of the sub-battery, and the third pin is grounded through the capacitor C15, the capacitor C16, the capacitor C17, and the capacitor C18, respectively. The sixth pin of the chip IC2001 is connected to the second pin through the capacitor C19, and the second pin is connected to the inductor L2 and grounded through the capacitor C20, the capacitor C21, the capacitor C22, and the capacitor C23. Inductor L2 is connected to the fourth pin through resistor R6 and to ground through resistor R7.
In one embodiment, the chip IC2001 is a DC/DC buck regulator for controlling voltage conversion, model TPS 56300.
The sub-battery converts the voltage into a constant voltage by the second DC/DC converter 180, and the output voltage of the second DC/DC converter 180 is determined by the ratio of the resistance value of the resistor R6 to the resistance value of the resistor R7. The calculation formula of the output voltage of the second DC/DC converter 180 is derived from a large amount of experimental data as follows:
wherein, VOUT2R6 is the resistance value of the resistor R6, and R7 is the resistance value of the resistor R7, which are the output voltages of the second DC/DC converter 180.
How the output voltage V of the first DC/DC converter 140 is enabled by the resistors R1, R2, R6 and R7 will be explained in detail belowOUT1Is higher than the output voltage V of the second DC/DC converter 180OUT2Slightly higher. The appropriate resistor R1 and resistor R2 are selected according to the formula (1) of the output voltage of the first DC/DC converter. And selecting the resistor R6 and the resistor R7 according to the formula (2) of the output voltage of the second DC/DC converter so as to ensure that the output voltage V of the first DC/DC converterOUT1Is higher than the output voltage V of the second DC/DC converterOUT2Slightly higher, i.e. higher than the preset value.
For example, selecting a resistor R1 with a resistance of 50K Ω, a resistor R2 with a resistance of 10K Ω, a resistor R6 with a resistance of 40K Ω and a resistor R7 with a resistance of 10K Ω, V can be calculated according to the equations (1) and (2)OUT1＝4.536V， VOUT23.825V, when VOUT1Higher than VOUT20.711V, then VOUT1Slightly higher than VOUT2。
It should be noted that the specific values listed in the above examples only explain the circuit, and in practical applications, circuit elements with appropriate sizes should be selected to implement the circuit based on electrical knowledge through precise calculation under the premise of safety.
As shown in fig. 2, the first ideal diode 150 includes a driving chip IC1002, a resistor R3, a resistor R4, a resistor R5, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, and a MOS transistor M1.
The driving chip IC1002 is used for controlling the on and off of the MOS transistor M1. The MOS transistor M1 is integrated in a chip, the first pin, the second pin and the third pin are the source electrode of the MOS transistor M1, the fourth pin is the grid electrode of the MOS transistor M1, and the fifth pin to the ninth pin are the drain electrodes of the MOS transistor M1.
Specifically, the source of the MOS transistor M1 is connected to the seventh pin of the driver IC1002, and is connected to the first pin of the driver IC1002 through the resistor R5. The gate of the MOS transistor M1 is connected to the fifth pin of the driver IC1002, and a capacitor C14 is connected in parallel between the source and the drain of the MOS transistor M1. The drain of the MOS transistor M1 is connected to the VBATT supply network. The first pin of the driver chip IC1002 is connected to the sixth pin of the driver chip IC1002 through a resistor R3 and is grounded through a capacitor C10. The sixth pin of the driver chip IC1002 is grounded through a capacitor C13, and the second pin of the driver chip IC1002 is connected to the third pin and the fourth pin of the driver chip IC1002 through a resistor R4 and grounded. The eighth pin of the driver chip IC1002 is connected to the first DC/DC converter 140 through a capacitor C11, and the seventh pin of the driver chip IC1002 is grounded through a capacitor C12.
The first ideal diode 150 controls the MOS transistor M1 to be conducted when the voltage is forward biased and to be cut off when the voltage is reverse biased through the driving chip IC1002, so that the current on the side of the main battery 130 is conducted when the main battery 130 is normally discharged, the current on the side of the main battery 130 is blocked when the voltage of the main battery 130 is reduced to zero, the voltage drop is reduced, the power loss is reduced, and the function similar to that of an ideal diode can be realized.
As shown in fig. 3, the second ideal diode 190 specifically includes a driving chip IC2002, a resistor R8, a resistor R9, a resistor R10, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, a capacitor C28, and a MOS transistor M2.
The driving chip IC2002 is used for controlling the on and off of the MOS transistor M2. The MOS transistor M2 is integrated in a chip, the first pin, the second pin and the third pin are the source electrode of the MOS transistor M2, the fourth pin is the grid electrode of the MOS transistor M2, and the fifth pin to the ninth pin are the drain electrodes of the MOS transistor M2.
Specifically, the source of the MOS transistor M2 is connected to the seventh pin of the driver IC2002, and is connected to the first pin of the driver IC2002 through the resistor R10. The gate of the MOS transistor M2 is connected to the fifth pin of the driver IC2002, and a capacitor C28 is connected in parallel between the source and the drain of the MOS transistor M2. The drain of the MOS transistor M2 is connected to the VBATT supply network. The first pin of the driver IC2002 is connected to the sixth pin of the driver IC2002 through a resistor R8, and is grounded through a capacitor C24. The sixth pin of the driver chip IC2002 is grounded through a capacitor C27. The second pin of the driver IC2002 is connected to the third pin and the fourth pin through a resistor R9. The eighth pin of the driver chip IC2002 is connected to the second DC/DC converter 180 through a capacitor C25. The seventh pin of the driver chip IC2002 is grounded through a capacitor C26.
Similarly, the second ideal diode 180 can also realize a function similar to an ideal diode, and the MOS transistor M2 is controlled by the driving chip IC2002 to be turned on when the voltage is biased forward and turned off when the voltage is biased backward, so as to block the current of the sub-battery 170 when the main battery 130 is normally discharged and turn on the current of the sub-battery 170 when the voltage of the main battery 130 is reduced to zero.
In one embodiment, the driving chip IC1002 and the driving chip IC2002 are used for controlling the on and off of the MOS tube, and the model is TPS 2413-TSSOP.
As shown in fig. 1, the hot plug apparatus for an uninterruptible power supply battery according to the embodiment of the present disclosure further includes a charging chip 110, a first load switch 120, and a second load switch 160.
Specifically, the charging chip 110 is used for detecting real-time voltage, temperature, charging current and other information of the main battery 130 and the auxiliary battery 170, and controlling the charging process of the main and auxiliary batteries. The first load switch 120 is used for controlling the current magnitude of the charging chip 110 for charging the main battery 130, and the second load switch 160 is used for controlling the current magnitude of the charging chip 110 for charging the sub-battery 170.
In one embodiment, when the charging chip 110 detects that the voltages of the main battery 130 and the sub-battery 170 are different, the load switch on the battery side corresponding to the high voltage is controlled to turn off the charging state, so as to charge the battery corresponding to the low voltage first. After the voltages of the main battery 130 and the auxiliary battery 170 are at the same level, that is, until the difference between the current voltage of the main battery 130 and the current voltage of the auxiliary battery 170 is smaller than a preset threshold, the first load switch 120 and the second load switch 160 are controlled to be turned on, so that the main battery 130 and the auxiliary battery 170 are both in a charging state, and the main battery 130 and the auxiliary battery 170 are charged in parallel.
For example, if the charging chip 110 detects that the voltage of the sub-battery 170 is higher than the voltage of the main battery 130, the second load switch 160 is controlled to turn off the charging state, and the main battery 130 is charged with priority. After detecting that the current voltages of the main battery 130 and the auxiliary battery 170 are the same or the difference value is smaller than the preset threshold value, the second load switch 160 is controlled to turn on the charging state, and the main battery 130 and the auxiliary battery 170 are charged in parallel.
The first load switch 120 and the second load switch 160 implement the above functions through specific circuits, and the specific implementation circuits of the first load switch 120 and the second load switch 160 are explained below through fig. 4 and 5.
Fig. 4 is a circuit diagram of the first load switch 120 according to an embodiment of the present application, and fig. 5 is a circuit diagram of the second load switch 160 according to an embodiment of the present application.
As shown in fig. 4, the first load switch 120 includes a chip IC3001, a control switch K1, a resistor R11, a resistor R12, a resistor R13, a resistor R14, and a capacitor C31.
Specifically, the first pin, the second pin, and the third pin of the chip IC3001 are connected to the charging chip 110. The seventh pin of the chip IC3001 is connected to the control switch K1 through a resistor R11, and the fourth pin is connected to the sixth pin through a resistor R12 and a capacitor C31. The fifth pin of the chip IC3001 is connected to the fourth pin through a resistor R13 and to ground. The eighth pin, the ninth pin, and the tenth pin of the chip IC3001 are connected to the main battery 130.
The control switch K1 is used to control the chip IC3001 to turn on or off, and if the charging chip detects that the voltage of the main battery 130 is higher than the voltage of the auxiliary battery 170, the charging chip controls the control switch K1 in the circuit of the first load switch 120 to turn off the chip IC3001, and the first load switch 120 turns off the charging state.
The resistor R13 is used to determine the magnitude of the current defined in the first load switch 120, and a resistor R13 with a proper resistance is selected to obtain a defined current with a proper magnitude as the main battery charging current. The formula for the limit current of the first load switch 120 is:
wherein, ILIM1For the limited current of the first load switch 120, R13 is the resistance of the resistor R13.
As shown in fig. 5, the second load switch 160 includes a chip IC4001, a control switch K2, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C35, and a transistor Q2.
Specifically, the first pin and the second pin of the chip IC4001 are connected to the seventh pin through the resistor R20 and grounded, and the fourth pin is connected to the charging chip 110. The base of the transistor Q2 is connected to the control switch K2, and the collector is connected to the third pin of the chip IC 4001. The emitter of the transistor Q2 is connected to the eighth pin of the chip IC4001 through a resistor R18 and is grounded. The resistor R15 is connected in parallel with the resistor R16, one end of the resistor R15 is connected with the charging chip, and the other end of the resistor R15 is connected with the third pin of the chip IC 4001. One end of the resistor R17 is connected with the collector of the triode Q2, and the other end is connected with the resistor R18. The sixth pin of the chip IC4001 is connected to the fifth pin via a resistor R19, and is connected to the sub-battery 170.
The control switch K2 is used to control the chip IC4001 to turn on or off, and if the charging chip 110 detects that the voltage of the sub-battery 170 is higher than the voltage of the main battery 130, the charging chip 110 controls the control switch K2 in the second load switch 160 circuit to turn off the chip IC4001, and the second load switch 160 is turned off in the charging state.
The resistor R20 is used to determine the current magnitude defined in the second load switch 160, and a resistor R20 with a proper resistance is selected to obtain a defined current of a proper magnitude as the current for charging the secondary battery. The formula for the limit current of the second load switch 160 is:
wherein, ILIM2For the limited current of the second load switch 160, R20 is the resistance of the resistor R20.
In one embodiment, the main batteryThe capacity 130 is ten times the capacity of the sub-battery 170. Limiting current I of the first load switch 120LIM12.5A, the second load switch 160LIM2And was 400 mA. It should be noted that this embodiment is only a preferred embodiment of the present application, and is not intended to limit the present application.
In one embodiment, chip IC3001 and chip IC4001 are programmable current limit switches, model SGM2526YTD 10G/TR.
As shown in fig. 1 to 5, one side of the charging chip 110 is connected to the first pin of the chip IC3001 of the first load switch 120 shown in fig. 4, and the drain of the MOS transistor M3 in the first load switch 120 is connected to the main battery 130. The main battery is connected with a third pin of a chip IC1001 in the main battery discharge circuit shown in FIG. 2, and a drain electrode of a MOS tube M1 in the main battery discharge circuit is connected with a VBATT power supply network. On the other hand, the charging chip 110 is connected to the fourth pin of the chip IC4001 of the second load switch 160 shown in fig. 5, and the drain of the MOS transistor M4 in the second load switch 160 is connected to the sub-battery 170. The sub-battery is connected with the third pin of the chip IC2001 in the sub-battery discharge circuit shown in FIG. 3, and the drain of the MOS transistor M2 in the sub-battery discharge circuit is connected with the VBATT power supply network. Therefore, the realization mode of the complete circuit of the uninterrupted power supply battery hot plug device provided by the embodiment of the application can be formed.
In one embodiment, the charging chip 110 monitors information such as voltage, charging current, and battery temperature of the main battery 130 and the sub-battery 170 in real time during charging the main battery 130 and the sub-battery 170, and detects the hot plug device of the uninterruptible power supply battery according to the monitored values of the information, and if one parameter of the voltage, the output current, and the battery temperature exceeds a set corresponding safety value, the charging is automatically stopped.
For example, if the charging chip 110 detects that the temperature of the main battery 130 or the sub-battery 170 is too high and exceeds a preset safety value of 30 degrees celsius during the charging process, the charging process is immediately stopped to protect the battery.
As shown in fig. 1, the apparatus for hot-plugging uninterruptible power supply battery further includes: and the electricity meter 200 is used for monitoring the discharge voltage, the output current, the temperature and other information of the main battery 130 and the auxiliary battery 170 in real time in the discharge process of the main battery 130 and the auxiliary battery 170, detecting the hot plug device of the uninterruptible power supply battery according to the monitoring result of the information, and stopping the device if one parameter of the discharge voltage, the output current and the battery temperature exceeds a set safety value. During the charging of the main battery 130 and the sub-battery 170, the electricity meter 200 performs auxiliary monitoring of the states of the main battery 130 and the sub-battery 170.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application. It should be noted that various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made without departing from the principle of the present invention shall be included in the scope of the claims of the present application.
Claims (10)
1. The utility model provides a device of incessant power supply battery hot plug which characterized in that includes:
a main battery and a sub-battery;
a main battery discharge circuit including a first DC/DC converter and a first ideal diode; one end of the first DC/DC converter is connected with the main battery, and the other end of the first DC/DC converter is connected with the first ideal diode;
a sub-battery discharge circuit including a second DC/DC converter and a second ideal diode; one end of the second DC/DC voltage device is connected with the auxiliary battery, and the other end of the second DC/DC voltage device is connected with the second ideal diode;
the main battery discharging circuit and the auxiliary battery discharging circuit are connected with a power supply network, so that the main battery and the auxiliary battery supply power to the power supply network;
the first DC/DC converter output voltage is higher than the second DC/DC converter output voltage to put the second ideal diode in an off state to block the current of the secondary battery from flowing to the power supply network until the output voltage of the primary battery is zero to put the second ideal diode in an on state, the secondary battery current flowing to the power supply network.
2. The device for hot plug of uninterruptible power supply battery according to claim 1, further comprising:
a charging chip;
the first load switch is used for controlling the current of the charging chip for charging the main battery;
the second load switch is used for controlling the charging current of the secondary battery by the charging chip;
the charging chip is used for detecting the voltages of the main battery and the auxiliary battery, and controlling the working state of a load switch corresponding to a high-voltage battery in the main battery and the auxiliary battery under the condition that the detected voltages of the main battery and the auxiliary battery are different, so as to charge the battery corresponding to the low voltage; and charging the main battery and the sub-battery in parallel when it is detected that the voltage of the main battery and the voltage of the sub-battery are the same.
3. The uninterrupted power supply battery hot plug device according to claim 1,
the first DC/DC converter includes a first resistor (R1) and a second resistor (R2), the second DC/DC converter includes a sixth resistor (R6) and a seventh resistor (R7);
the ratio of the resistance of the sixth resistor (R6) to the resistance of the seventh resistor (R7) is smaller than the ratio of the resistance of the first resistor (R1) to the resistance of the second resistor (R2).
4. The uninterrupted power supply battery hot plug device according to claim 1,
the first ideal diode is used for blocking the main battery current path when the voltage is reversely biased and conducting the main battery current path when the voltage is forwardly biased;
and the second ideal diode is used for blocking the current path of the auxiliary battery when the voltage is reversely biased and conducting the current path of the auxiliary battery when the voltage is positively biased.
5. The device for hot plug of uninterrupted power supply battery according to claim 4,
the first ideal diode specifically comprises a first driving chip (IC1002), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a tenth capacitor (C10), an eleventh capacitor (C11), a twelfth capacitor (C12), a thirteenth capacitor (C13), a fourteenth capacitor (C14) and a first transistor (M1); wherein:
the source electrode of the first transistor (M1) is connected with the seventh pin of the first driving chip (IC1002) and is connected with the first pin of the first driving chip (IC1002) through a fifth resistor (R5);
the grid electrode of the first transistor (M1) is connected with the fifth pin of the first driving chip (IC1002), a fourteenth capacitor (C14) is connected in parallel between the source electrode and the drain electrode of the first transistor (M1), and the drain electrode of the first transistor (M1) is connected with the power supply network;
the first pin of the first driving chip (IC1002) is connected with the sixth pin of the first driving chip (IC1002) through a third resistor (R3) and is grounded through a tenth capacitor (C10);
the sixth pin of the first driving chip (IC1002) is grounded through a thirteenth capacitor (C13), and the second pin of the first driving chip (IC1002) is connected with the third pin and the fourth pin of the first driving chip (IC1002) through a fourth resistor (R4); the eighth pin of the first driving chip (IC1002) is connected with the first DC/DC converter through an eleventh capacitor (C11), and the seventh pin of the first driving chip (IC1002) is grounded through a twelfth capacitor (C12).
6. The device for hot plug of uninterrupted power supply battery according to claim 4,
the second ideal diode specifically comprises a second driving chip (IC2002), an eighth resistor (R8), a ninth resistor (R9), a tenth resistor (R10), a twenty-fourth capacitor (C24), a twenty-fifth capacitor (C25), a twenty-sixth capacitor (C26), a twenty-seventh capacitor (C27), a twenty-eighth capacitor (C28) and a second transistor (M2); wherein:
the source of the second transistor (M2) is connected with the seventh pin of the second driving chip (IC2002) and is connected with the first pin of the first driving chip (IC2002) through a tenth resistor (R10);
the grid electrode of the second transistor (M2) is connected with the fifth pin of the first driving chip (IC2002), a twenty-eighth capacitor (C28) is connected in parallel between the source electrode and the drain electrode of the second transistor (M2), and the drain electrode of the second transistor (M2) is connected with the power supply network;
the first pin of the second driving chip (IC2002) is connected with the sixth pin of the second driving chip (IC2002) through an eighth resistor (R8) and is grounded through a twenty-four capacitor (C24);
a sixth pin of the second driving chip (IC2002) is grounded through a twenty-seventh capacitor (C27); the second pin of the second driving chip (IC2002) is connected with the third pin and the fourth pin through a ninth resistor (R9); the eighth pin of the second driving chip (IC2002) is connected with the second DC/DC converter through a twenty-fifth capacitor (C25); the seventh pin of the second driver chip (IC2002) is grounded through a twenty-sixth capacitor (C26).
7. The device for hot plug of the uninterruptible power supply battery according to claim 2, wherein:
the first load switch comprises a first control switch (K1) and a first control chip (IC3001), and the second load switch comprises a second control switch (K2) and a second control chip (IC 4001);
the charging chip is also used for adjusting the first control switch (K1) to stop the first control chip (IC3001) under the condition that the main battery voltage is detected to be higher than the auxiliary battery voltage; and a second control switch (K2) for adjusting the second control switch to stop the second control chip (IC4001) when the sub battery voltage is higher than the main battery voltage.
8. The uninterrupted power supply battery hot-plugging device according to claim 2,
the first load switch further comprises a thirteenth resistor (R13), the second load switch further comprises a twentieth resistor (R20);
the thirteenth resistor (R13) has a smaller resistance value than the twentieth resistor (R20).
9. The device for hot plug of the uninterruptible power supply battery according to claim 1, wherein:
the charging chip is also used for reading one or more parameters of the voltage, the charging current and the temperature of the main battery and the auxiliary battery in the charging process of the main battery and the auxiliary battery; and detecting the uninterrupted power supply battery hot plug device according to the one or more parameters, and stopping the device under the preset condition that any one parameter reaches the setting.
10. The device for hot plug of uninterruptible power supply battery according to claim 1, further comprising:
the electric quantity meter is used for monitoring one or more parameters of discharge voltage, output current and temperature of the main battery and the auxiliary battery in real time in the discharge process of the main battery and the auxiliary battery, detecting the uninterrupted power supply battery hot plug device according to the one or more parameters, and stopping the device when any parameter reaches a preset condition.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542866A (en) * | 2020-11-20 | 2021-03-23 | 济南轻骑铃木摩托车有限公司 | Multi-battery management control system and battery management method for motorcycle |
| CN113193646A (en) * | 2021-04-30 | 2021-07-30 | 北京百度网讯科技有限公司 | Power supply device, method and system |
| CN113267736A (en) * | 2021-05-31 | 2021-08-17 | 荣耀终端有限公司 | Charging test device and method |
| WO2024007983A1 (en) * | 2022-07-05 | 2024-01-11 | 华为技术有限公司 | Dual-battery switching apparatus and electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS645335A (en) * | 1987-06-15 | 1989-01-10 | Deere & Co | Double electric system for vehicle |
| CN101039040A (en) * | 2006-03-14 | 2007-09-19 | 广达电脑股份有限公司 | Charging-discharging controller |
| CN101136558A (en) * | 2006-09-02 | 2008-03-05 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply system and switch circuit, switch method of main power source and backup battery |
| CN101867199A (en) * | 2009-04-15 | 2010-10-20 | 中兴通讯股份有限公司 | Device and method for storing electricity for fiber access device |
| JP6557034B2 (en) * | 2015-03-23 | 2019-08-07 | アクソンデータマシン株式会社 | Power supply |
-
2020
- 2020-08-04 CN CN202010772844.3A patent/CN111934416B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS645335A (en) * | 1987-06-15 | 1989-01-10 | Deere & Co | Double electric system for vehicle |
| CN101039040A (en) * | 2006-03-14 | 2007-09-19 | 广达电脑股份有限公司 | Charging-discharging controller |
| CN101136558A (en) * | 2006-09-02 | 2008-03-05 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply system and switch circuit, switch method of main power source and backup battery |
| CN101867199A (en) * | 2009-04-15 | 2010-10-20 | 中兴通讯股份有限公司 | Device and method for storing electricity for fiber access device |
| JP6557034B2 (en) * | 2015-03-23 | 2019-08-07 | アクソンデータマシン株式会社 | Power supply |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542866A (en) * | 2020-11-20 | 2021-03-23 | 济南轻骑铃木摩托车有限公司 | Multi-battery management control system and battery management method for motorcycle |
| CN113193646A (en) * | 2021-04-30 | 2021-07-30 | 北京百度网讯科技有限公司 | Power supply device, method and system |
| CN113267736A (en) * | 2021-05-31 | 2021-08-17 | 荣耀终端有限公司 | Charging test device and method |
| CN113267736B (en) * | 2021-05-31 | 2022-04-12 | 荣耀终端有限公司 | Charging test device and method |
| WO2024007983A1 (en) * | 2022-07-05 | 2024-01-11 | 华为技术有限公司 | Dual-battery switching apparatus and electronic device |
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| CN111934416B (en) | 2021-12-28 |
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