CN114172258A - Switching circuit with automatic battery selection function and power supply device thereof - Google Patents
Switching circuit with automatic battery selection function and power supply device thereof Download PDFInfo
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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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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Abstract
The present application relates to the field of power supply circuit technology, and in particular, to a switching circuit with an automatic battery selection function and a power supply apparatus thereof. The switching circuit comprises a public output module and at least two groups of battery discharging modules, and the at least two groups of battery discharging modules are coupled with the public output module in parallel; each group of battery discharge modules all includes: the battery input submodule is used for accessing an external battery; an automatic identification submodule for identifying whether a reverse current is present: if the reverse current is identified, outputting a disconnection driving signal; if the reverse current is not identified, outputting a conduction driving signal; and the switch submodule is used for executing disconnection operation of the battery input submodule and the public output module according to the received disconnection driving signal or executing conduction operation of the battery input submodule and the public output module according to the received conduction driving signal. This application can need not manually just to switch the battery when the consumer does not cut off the power supply, can satisfy the power supply continuation of the journey of consumer.
Description
Technical Field
The present application relates to the field of power supply circuit technology, and in particular, to a switching circuit with an automatic battery selection function and a power supply apparatus thereof.
Background
With the continuous development of the technical level, the purposes and the performances of the electric products are gradually upgraded and optimized. In daily life, the kinds and frequency of electric products used by people are also increasing. Accordingly, the demand of electric energy for electric products is also increasing.
In order to meet the power consumption requirement of the electric product, two groups of batteries are arranged in the device for supplying power to the electric product, wherein one group of batteries can be used as a main battery for supplying power, and the other group of batteries can be used as a standby battery.
In actual use, a voltage difference exists between the main battery and the backup battery to a certain extent, and if the two groups of batteries in the case supply power to the electric product at the same time, the group of batteries with relatively high voltage in the two groups of batteries reversely charges the group of batteries with relatively low voltage, so that the group of batteries with relatively low voltage is damaged.
Therefore, the conventional means is to manually switch the battery for power supply, i.e. replace the battery with relatively high voltage with the battery with relatively low voltage, and then the replaced battery continues to supply power to the electric product. However, such a measure has the following drawbacks: before manual switching, the power-consuming product needs to be powered off first, so that the power-consuming product cannot be used temporarily; and manual switching is generally implemented by adopting a toggle switch, the instantaneous current of the toggle switch is overlarge, electric sparks are easy to generate, the service life of the battery and the service life of the toggle switch are shortened, and potential safety hazards can be caused to subsequent use of the battery.
In view of the above-mentioned related technologies, the inventor considers how to safely and effectively satisfy the endurance of the electric products without affecting the continuous use of the electric products, and needs to solve the problem.
Disclosure of Invention
For overcoming the not enough of prior art, under the condition that the power consumption product does not cut off the power supply, realize need not the manual battery that just can switch, satisfy the power supply continuation of the journey of power consumption product, the life of extension battery and the security that improves the battery power supply. The application provides a switching circuit with an automatic battery selection function and a power supply device thereof.
In a first aspect, the present application provides a switching circuit with an automatic battery selection function, including a common output module and at least two sets of battery discharge modules, where the at least two sets of battery discharge modules are both coupled in parallel with the common output module; each group of the battery discharge modules includes: the battery input submodule is used for accessing an external battery; an automatic identification submodule for identifying whether a reverse current is present: if the reverse current is identified, outputting a disconnection driving signal; if the reverse current is not identified, outputting a conduction driving signal; and the switch submodule is used for executing the disconnection operation of the battery input submodule and the public output module according to the received disconnection driving signal or executing the conduction operation of the battery input submodule and the public output module according to the received conduction driving signal.
By adopting the scheme, the user respectively accesses at least two external batteries into the corresponding battery input sub-modules. If a voltage difference exists between the batteries connected to the battery discharging module, the automatic identification submodule corresponding to the batteries judges whether reverse current exists at the moment of electrifying, if so, the voltage of the batteries is proved to be relatively low, and at the moment, the automatic identification submodule controls the corresponding switch submodule to be disconnected, so that the batteries are disconnected with the public output module, and power supply is stopped. Therefore, the battery protector can protect the battery with relatively low voltage and prolong the service life of the battery. For the rest of batteries with relatively high voltage, the voltage of the rest of batteries is gradually reduced during discharging, when the voltage of the rest of batteries is reduced to be consistent with the battery with relatively low original voltage, the battery with relatively low original voltage corresponds to the automatic identification submodule to judge that reverse current does not exist, the corresponding switch submodule is controlled to be switched on, a plurality of batteries with consistent voltage are automatically selected to continuously supply power to the electric product, the batteries can be switched without manual operation under the condition that the electric product is not powered off, the power supply continuation of the electric product is met, and potential safety hazards caused by manual switching are favorably prevented.
Optionally, the battery input submodule includes a positive input terminal and a negative input terminal; the automatic identification submodule comprises an identification controller, and the identification controller comprises a first input pin, a second input pin and an output pin; the switch sub-module comprises a switch component, and the switch component comprises a control end, a first access end and a second access end; the public output module comprises a public positive output end and a public negative output end; the first input pin is coupled to the positive input terminal, and the positive input terminal is coupled to the common positive output terminal; the negative input end is coupled with the second input pin, and the output pin is coupled with the control end; the negative input end and the second input pin are both coupled with the first access end, the second access end is grounded, and the second access end is coupled with the public negative output end.
By adopting the scheme, the identification controller can effectively judge whether reverse current exists or not, and timely sends a control signal to the switch element device according to the judgment result, so that the switch element device executes corresponding operation, and the automation degree is improved.
Optionally, the identification controller adopts a JW3332 chip, the first input pin is a first pin of the JW3332 chip, and a fourth pin of the JW3332 chip is coupled to the first pin of the JW3332 chip; the second input pin is a fifth pin of the JW3332 chip, the output pin is an eighth pin of the JW3332 chip, and a sixth pin of the JW3332 chip is grounded.
By adopting the scheme, the identification controller is helped to ensure that the identification controller has the function of judging whether the reverse current exists or not.
Optionally, the switch sub-module includes a plurality of switch components, each of the plurality of switch components adopts a first NMOS transistor, the control end is a gate of the first NMOS transistor, the first access end is a drain of the first NMOS transistor, and the second access end is a source of the first NMOS transistor; the first NMOS tubes are connected in parallel.
By adopting the scheme, the NMOS tube has low internal resistance and high power, and can effectively reduce the electric energy loss in the process of executing the switching operation.
Optionally, the number of the battery discharging modules is at least three groups, and the at least three groups of the battery discharging modules are all coupled in parallel with the common output module.
By adopting the scheme, the parallel discharge performance of the plurality of batteries is synchronously supported.
Optionally, a filtering component is connected in parallel between the common positive output end and the common negative output end.
By adopting the scheme, the filtering component plays a role in filtering.
Optionally, a first current limiting component is connected between the first pin of each JW3332 chip and the corresponding first input pin, and a second current limiting component is connected between the first pin of each JW3332 chip and the fourth pin of the JW3332 chip.
By adopting the scheme, the current-limiting component plays a role in limiting current.
Optionally, a third current limiting component is connected between the eighth pin of each JW3332 chip and the corresponding control end.
By adopting the scheme, the filter can play a role in filtering.
Optionally, a fourth current limiting component is connected between the fifth pin of each JW3332 chip and the corresponding first access end.
By adopting the scheme, the current-limiting component plays a role in limiting current.
In a second aspect, the present application provides a power supply device, which includes a battery and any one of the above switching circuits with an automatic battery selection function, the number of the battery discharge modules of the switching circuit is the same as the number of the battery, and the output end of one of the batteries is connected to the battery input submodule of the corresponding battery discharge module.
In summary, the present application includes at least one of the following beneficial technical effects:
according to the switching circuit with the function of automatically selecting the batteries, a user respectively accesses at least two batteries in the outside into the corresponding battery input submodules. If a voltage difference exists between the batteries connected to the battery discharging module, the automatic identification submodule corresponding to the battery with relatively low voltage controls the switch submodule to be disconnected, so that the battery and the public output module are disconnected, and power supply is stopped. Therefore, the battery protector can protect the battery with relatively low voltage and prolong the service life of the battery.
For the rest of batteries with relatively high voltage, the voltage of the rest of batteries is gradually reduced during discharging, when the voltage of the rest of batteries is reduced to be consistent with the battery with relatively low original voltage, the automatic identification submodule corresponding to the battery with relatively low original voltage controls the corresponding switch submodule to be switched on, the batteries with consistent voltage are automatically selected to continuously supply power to the electric product, the batteries can be switched without manual operation under the condition that the electric product is not powered off, the power supply continuation of the electric product is met, and potential safety hazards caused by manual switching are favorably prevented.
The power supply device can supply power to a plurality of batteries for external power products, effectively meets the requirement of endurance of the power products, and can charge the power products by the batteries with relatively high voltage in an automatic selection mode when the plurality of batteries have voltage differences, so that the effect of protecting the batteries is achieved; if the voltages of the batteries are consistent, the batteries can be automatically selected to supply power to the electric product together.
Drawings
Fig. 1 is an overall block diagram of a switching circuit with an automatic battery selection function according to embodiment 1 of the present application.
Fig. 2 is a detailed block diagram of the switching circuit according to embodiment 1 of the present application.
Fig. 3 is a schematic circuit diagram of a switching circuit including two battery discharging modules according to embodiment 1 of the present application.
Fig. 4 is a schematic circuit diagram of a switching circuit including three sets of battery discharging modules according to embodiment 1 of the present application.
Fig. 5 is an equivalent schematic block diagram of the recognition controller according to embodiment 1 of the present application.
Fig. 6 is a block diagram of a switching circuit further including a protection module according to embodiment 2 of the present application.
Fig. 7 is a schematic circuit diagram of the protection module according to embodiment 2 of the present application.
Fig. 8 is a schematic circuit diagram of the protection module according to embodiment 3 of the present application.
Fig. 9 is a schematic circuit diagram of the protection module according to embodiment 4 of the present application.
Reference numerals: 1. a common output module; 2. a battery discharge module; 3. a battery input submodule; 4. an automatic identification submodule; 5. a switch submodule; 6. identifying a controller; 7. a voltage stabilization unit; 8. a first comparator unit; 9. a second comparator unit; 10. a logic control unit; 11. and a protection module.
Detailed Description
The present application is described in further detail below with reference to figures 1-9.
Example 1: referring to fig. 1 and 2, the present application discloses a switching circuit with an automatic battery selection function, including a common output module 1 and at least two sets of battery discharge modules 2, where the at least two sets of battery discharge modules 2 are coupled in parallel with the common output module 1; each group of battery discharge modules 2 includes: the battery input submodule 3 is used for accessing an external battery; an automatic identification submodule 4 for identifying whether a reverse current is present: if the reverse current is identified, outputting a disconnection driving signal; if the reverse current is not identified, outputting a conduction driving signal; and the switch submodule 5 is used for executing the operation of disconnecting the battery input submodule 3 from the common output module 1 according to the received disconnection driving signal or executing the operation of connecting the battery input submodule 3 with the common output module 1 according to the received connection driving signal.
During practical use, at least two external batteries are respectively connected to the corresponding battery input sub-modules 3, so that the electric energy of the batteries can sequentially pass through the automatic identification sub-module 4 and the switch sub-module 5 to reach the public output module 1, and external power supply is realized. In the process, if a voltage difference exists between the batteries connected to the battery discharge module 2, at the moment of electrifying the batteries, the automatic identification submodule 4 corresponding to the battery with relatively low voltage can identify that reverse current exists, the reverse current triggers the automatic identification submodule 4 to output a disconnection driving signal, and the disconnection driving signal is sent to the switch submodule 5, so that the switch submodule 5 executes disconnection operation. Therefore, the switch submodule 5 is used for cutting off the connection between the battery with relatively low voltage and the public output module 1, the battery with relatively high voltage continues to output and supply power, the battery with relatively low voltage stops supplying power, reverse current is prevented from reversely charging the battery, the battery with relatively low voltage is protected, and the service life of the battery is prolonged.
In addition, when the voltage of the battery with relatively high voltage is gradually reduced to be consistent with the voltage of the battery with relatively low voltage due to external output of electric energy, at this time, the automatic identification submodule 4 corresponding to the battery with relatively low voltage recognizes that no reverse current exists, and then triggers the automatic identification submodule 4 to output a conduction driving signal, and the conduction driving signal is sent to the switch submodule 5, so that the switch submodule 5 executes conduction operation, and thus, the batteries with consistent voltage are selected to be connected in parallel to output power externally, and the endurance of the electric product is effectively prolonged. And when switching, the electric product does not need to be powered off. The manual switching is not needed, the problems of electric sparks and/or overlarge current generated during switching are prevented, and potential safety hazards are eliminated.
In this embodiment, the battery input submodule 3 includes a positive input terminal and a negative input terminal; the automatic identification submodule 4 comprises an identification controller 6, and the identification controller 6 comprises a first input pin, a second input pin and an output pin; the switch sub-module 5 comprises a switch component, and the switch component comprises a control end, a first access end and a second access end; the public output module 1 comprises a public positive output end and a public negative output end; the first input pin is coupled with the positive input end, and the positive input end is coupled with the common positive output end; the negative input end is coupled with the second input pin, and the output pin is coupled with the control end; the negative input end and the second input pin are both coupled with the first access end, the second access end is grounded, and the second access end is coupled with the public negative output end.
Referring to fig. 3, taking two groups of battery discharging modules 2 as an example, each group of battery input sub-modules 3 is respectively connected with the positive electrode of the battery through the positive electrode input end, and the negative electrode input end is connected with the negative electrode of the battery. The electric energy of the two groups of batteries sequentially passes through the corresponding automatic identification submodule 4 and the switch submodule 5, so that the moment that the public output module 1 is electrified to the outside is reached. If the two groups of batteries have voltage difference, because the two groups of battery discharging modules 2 share the common positive output end and the common negative output end of the common output module 1, the second input pin of the identification controller 6 corresponding to the battery with relatively low voltage flows in reverse current, and the voltage corresponding to the reverse current is compared with the battery voltage accessed by the first input pin of the identification controller 6, so that the condition that the reverse current exists is obtained. The identification controller 6 outputs a disconnection driving signal through an output pin according to the condition, the disconnection driving signal is sent to a control end of the switch component, and the switch component drives the first access end and the second access end to be disconnected according to the disconnection driving signal. Thereby realizing that the battery with relatively low voltage temporarily cuts off the output electric energy. The battery with relatively high voltage continues to output electric energy to the outside.
When the voltage of the battery with relatively high voltage is gradually reduced to be consistent with the voltage of the battery with relatively low voltage due to the output of electric energy, the second input pin of the identification controller 6 corresponding to the battery with relatively low voltage does not have inflow reverse current, the identification controller 6 obtains the condition that no reverse current exists through comparison, outputs a conduction driving signal through the output pin according to the condition, the conduction driving signal is sent to the control end of the switch component, and the switch component drives the first access end and the second access end to be conducted according to the conduction driving signal. At this time, two batteries with the same voltage are connected in parallel with the common output module 1 and simultaneously supply power to the outside.
Referring to fig. 4, further, the number of the battery discharge modules 2 is at least three groups, and at least three groups of the battery discharge modules 2 are all coupled in parallel with the common output module 1.
Taking three groups of battery discharging modules 2 as an example, each group of battery discharging modules 2 is connected with a battery, according to the working principle, at the moment when the three batteries are powered on, if voltage differences exist among the three batteries, the battery with the highest voltage is continuously powered on the outside, and the other two batteries with the lower voltage temporarily cut off output electric energy until the voltage of the battery with the highest voltage is reduced to be consistent with the voltage of one battery, then the two batteries are automatically selected to be powered on the outside simultaneously according to the working principle, and similarly, the three batteries are automatically selected to be powered on the outside simultaneously until the voltages of the two batteries with the same voltage are reduced to be consistent with the voltage of the third battery. Or the voltage of the battery with the highest voltage is reduced to be consistent with the voltages of the other two batteries with the same voltage, and then the three batteries are automatically selected to simultaneously supply power to the outside. Taking more than three groups of battery discharging modules 2 as an example, the principle of automatic selection and external power supply is the same as the above, and will not be described herein again. In this way, this application realizes the effect of a plurality of parallelly connected and integrated output of battery, when the voltage between the battery is inconsistent, recognition controller 6 can the high battery of automatic selection voltage carry out external power supply, with this satisfy the problem of carrying out continuous continuation of the journey to consumer, and owing to be parallel connection between the battery, help reducing the condition of mutual interference, when damage appears in one of them battery, the user only needs to replace the battery that damages and can overcome the damage condition, and do not influence the external power supply of other batteries, convenient maintenance. In addition, the effect of increasing the output current can be achieved. Specifically, the output operating current range is 15A-100A.
As one embodiment, the recognition controller 6 employs a JW3332 chip, the JW3332 chip is a chip having eight pins, the first input pin is a first pin of the JW3332 chip, and a fourth pin of the JW3332 chip is coupled to the first pin of the JW3332 chip; the second input pin is a fifth pin of the JW3332 chip, the output pin is an eighth pin of the JW3332 chip, and a sixth pin of the JW3332 chip is grounded.
Referring to fig. 5, a JW3332 chip, as an identification controller 6, is internally equivalent to include a voltage stabilizing unit 7, a first comparator unit 8, a second comparator unit 9, and a logic control unit 10, where the voltage stabilizing unit 7 includes a voltage stabilizing input terminal, a first voltage stabilizing output terminal, and a second voltage stabilizing output terminal, and the logic control unit 10 includes a first logic control input terminal, a second logic control input terminal, and a logic control output terminal. The first pin of the JW3332 chip is connected to the input terminal of the voltage stabilizing unit 7. The positive input terminal is coupled to the regulated input terminal through a first pin of the JW3332 chip. The first voltage stabilization output terminal is connected with the positive terminal of the first comparator unit 8. A fourth pin of the JW3332 chip is connected to a positive terminal of the first comparator unit 8, a negative terminal of the first comparator unit 8 is connected to a 1V voltage, and an output terminal of the first comparator unit 8 is connected to a first logic control input terminal of the logic control unit 10. The second voltage stabilization output end is connected with the second logic control input end. The logic control output end is connected with a pull-up voltage end of the second comparator unit 9, and the sixth pin of the JW3332 chip is connected with the positive end of the second comparator unit 9, that is, the positive end of the second comparator unit 9 is grounded. The fifth pin of the JW3332 chip is connected to the negative terminal of the second comparator unit 9, and the eighth pin of the JW3332 chip is connected to the output terminal of the second comparator unit 9.
The working principle of the recognition controller 6 is as follows: at the moment when the battery is powered on externally, the battery voltage is connected to the first pin and the fourth pin of the JW3332 chip through the positive input end, the fourth pin is a starting pin, and at the moment, the fourth pin is at a high potential, and then the 1V voltage is connected to the negative end of the first comparator unit 8 in cooperation with the negative end of the first comparator unit, so that the start logic control unit 10 is triggered to start. In addition, the battery voltage is input to the pull-up voltage terminal of the second comparator unit 9 through the turned-on logic control unit 10, and if there is no significant reverse current in the process, the second comparator unit 9 outputs a voltage corresponding to the pull-up voltage terminal through the eighth pin of the JW3332 chip, that is, outputs a high-level signal.
If there is an obvious reverse current in the process, the voltage corresponding to the reverse current is connected to the negative terminal of the second comparator unit 9 through the fifth pin of the JW3332 chip, and since the positive terminal of the second comparator unit 9 is grounded, the second comparator unit 9 can rapidly output no voltage through the eighth pin of the JW3332 chip, that is, output a low potential, thereby rapidly disconnecting the switching element device.
As one of the implementation manners, the switch submodule 5 includes a plurality of switch elements, each of the plurality of switch elements adopts a first NMOS transistor, the control end is a gate of the first NMOS transistor, the first access end is a drain of the first NMOS transistor, and the second access end is a source of the first NMOS transistor; the first NMOS tubes are connected in parallel.
The MOS transistor is an abbreviation of MOSFET, i.e. a MOSFET, wherein the first NMOS transistor is an N-channel MOS transistor. The NMOS tube has the advantages of high power and low internal resistance, and is beneficial to reducing electric energy loss. That is, when the eighth pin of the JW3332 chip outputs a high potential, that is, a turn-on driving signal, the gate of the first NMOS transistor receives the high potential, so as to turn on the drain and the source of the first NMOS transistor, and the corresponding battery supplies power to the outside through the common output module 1. When the eighth pin of the JW3332 chip outputs a low potential, that is, a disconnection driving signal, the gate of the first NMOS transistor receives the low potential, so that the drain and the source are disconnected, and the corresponding battery is disconnected from the common output module 1.
Furthermore, the number of the first NMOS tubes is a plurality of the first NMOS tubes which are connected in parallel, so that the channel resistance of the first NMOS tubes is greatly reduced, and the effect of increasing the output current is achieved at the same rated junction temperature.
The drain electrode and the source electrode of each first NMOS tube are connected with a first reverse diode in an equivalent parallel mode, the anode of each first reverse diode is connected with the source electrode of the corresponding first NMOS tube, and the cathode of each first reverse diode is connected with the drain electrode of the corresponding first NMOS tube.
And a filtering component is connected in parallel between the public positive output end and the public negative output end. The arrangement has the functions of filtering and eliminating noise. The number of the filter components can be set to be multiple according to the number of the battery discharge modules 2, and specifically, when the number of the battery discharge modules 2 is two, the number of the filter components is set to be one in parallel; when the number of the battery discharging modules 2 is three, the number of the filter components is set to be two in parallel.
A first current limiting component is connected between the first pin of each JW3332 chip and the corresponding first input pin, and a second current limiting component is connected between the first pin of each JW3332 chip and the fourth pin of the JW3332 chip. The arrangement has the function of current limiting, and the JW3332 chip is protected. Specifically, the first current limiting component and the second current limiting component both adopt resistors.
And a third current limiting component is connected between the eighth pin of each JW3332 chip and the control end of the corresponding switch component. The arrangement has the function of current limiting, and the JW3332 chip is protected. Specifically, the third current limiting components all adopt resistors.
And a fourth current limiting component is connected between the fifth pin of each JW3332 chip and the first access end of the corresponding switch component. The arrangement has the function of current limiting, and the JW3332 chip is protected. Specifically, the fourth current-limiting components all adopt resistors.
Example 2:
referring to fig. 6 and 7, unlike embodiment 1, the switching circuit further includes a protection module 11, and each group of battery discharge modules 2 is coupled to the common output module 1 through the protection module 11.
In the process of supplying power to the outside by the battery, the safety in power supply is improved by arranging the protection module 11, and the battery is also ensured not to be damaged.
As one embodiment, the protection module 11 includes an anti-reverse sub-module, the anti-reverse sub-module includes a second NMOS tube and a first resistor, a source of the second NMOS tube is connected to the common negative output terminal, a second access terminal of each group of switch sub-modules 5 is connected to a drain of the second NMOS tube, a gate of the second NMOS tube is connected to one end of the first resistor, and a positive input terminal of each group of battery input sub-modules 3 and the other end of the first resistor are connected to the common positive output terminal.
Specifically, Q1 in fig. 7 is the second NMOS transistor, and R1 is the first resistor. When the battery is correctly connected to the battery discharging module 2 and the reverse connection of the electric product and the public output module 1 occurs, the Vgs of the second NMOS tube cannot meet the requirement due to the reverse connection when the battery is just powered on due to the existence of the second NMOS tube, the second NMOS tube is disconnected, a current loop does not exist in the circuit, the circuit breaking function is realized, the electric product cannot be powered on to work, the battery and the electric product are protected, and the burning-out prevention effect is facilitated. Furthermore, a voltage regulator tube can be connected between the grid electrode and the source electrode in a bridging mode, and the voltage regulator tube helps to prevent the second NMOS tube from being burnt due to the fact that the voltage exceeds the Vgs maximum withstand voltage value of the second NMOS tube.
Example 3:
referring to fig. 8, unlike embodiments 1 and 2, the protection module 11 includes an overvoltage protection sub-module, which includes a PMOS transistor, a transistor K1, and a second resistor, the power supply circuit comprises a third resistor, a fourth resistor, a fifth resistor and a voltage stabilizing diode, wherein the source electrode of a PMOS (P-channel metal oxide semiconductor) tube is connected with one end of the second resistor, the other end of the second resistor is connected with the negative electrode of the voltage stabilizing diode, the positive electrode of the voltage stabilizing diode is connected with the second access end of each group of switch submodule 5, the negative electrode of the voltage stabilizing diode is connected with one end of the third resistor, the other end of the third resistor is connected with the base electrode of a triode K1, the emitting electrode of a triode K1 is connected with the source electrode of the PMOS tube, the positive input end of each group of battery input submodule 3 is connected with the source electrode of the PMOS tube, one end of the fourth resistor is connected with the collector electrode of a triode K1, and the other end of the fourth resistor is connected with the emitting electrode of a triode K1; the drain electrode of the PMOS tube is connected with the output end of the public positive electrode, the grid electrode of the PMOS tube is connected with one end of a third current-limiting resistor, the collector electrode of the triode K1 is connected with one end of a fifth resistor, and the other end of the third current-limiting resistor is connected with the output end of the public negative electrode; and the second access end of each group of switch submodule 5 and the other end of the fifth resistor are connected with the common negative output end.
Specifically, Q2 in fig. 8 is a PMOS transistor, R2 is a second resistor, R3 is a third resistor, R4 is a fourth resistor, R5 is a fifth resistor, and D1 is a zener diode. When the voltage input to the common output module 1 by the battery is the normal input voltage, the Vbc of the triode K1 is 0 at this time, the triode K1 is not conducted, the Vgs of the PMOS transistor is determined by the fourth resistor and the fifth resistor, the PMOS transistor is conducted, and the common output module 1 supplies power to the outside normally.
When the voltage input to the common output module 1 by the battery is greater than the normal input voltage, the voltage is greater than the Vbc at the moment, the voltage stabilizing diode is broken down, the triode K1 is conducted, namely Vce is approximately equal to 0, then Vgs of the PMOS tube is approximately equal to 0, then the PMOS tube is not conducted, the circuit is broken, and overvoltage protection is realized.
The PMOS tube is a P-channel MOS tube, the drain electrode and the source electrode of the first NMOS tube are equivalently connected with a second backward diode in parallel, the anode of the second backward diode is connected with the drain electrode of the first NMOS tube, and the cathode of the second backward diode is connected with the source electrode of the first NMOS tube.
Example 4:
different from the embodiments 1, 2 and 3, the protection module 11 includes an anti-reverse connection sub-module and an anti-overvoltage sub-module, and each group of battery discharge modules 2 is sequentially coupled with the anti-reverse connection sub-module, the anti-overvoltage sub-module and the common output module 1.
The electronic components and related circuit principles included in the anti-reverse connection submodule are the same as those described above, the electronic components and related circuit principles included in the anti-overvoltage submodule are the same as those described above, and the specific connection mode of each group of battery discharge modules 2 with the anti-reverse connection submodule, the anti-overvoltage submodule and the common output module 1 is shown in fig. 9, and are not described herein again. The arrangement can realize the combined protection function of reverse connection and overvoltage.
Example 5:
a power supply device comprises batteries and any one of the switching circuits with the function of automatically selecting the batteries, the number of the battery discharging modules 2 of the switching circuit is the same as that of the batteries, and the output end of one battery is electrically connected with the battery input submodule 3 of the corresponding battery discharging module 2.
The battery electric energy of the power supply device is transmitted to the public output module 1 through the corresponding automatic identification submodule 4, and then the external power utilization products are supplied with power. At the moment of power-on, if a voltage difference exists between the batteries, the automatic identification submodule 4 corresponding to the battery with relatively low voltage can identify that reverse current exists, the reverse current triggers the automatic identification submodule 4 to output a disconnection driving signal, and the disconnection driving signal is sent to the switch submodule 5, so that the switch submodule 5 executes disconnection operation. Therefore, the connection between the battery with relatively low voltage and the public output module 1 is cut off through the switch submodule 5, the battery with relatively high voltage is enabled to continue to output and supply power, the battery with relatively low voltage stops supplying power, reverse current is prevented from reversely charging the battery with relatively low voltage, the battery is protected, the service life of the battery is prolonged, and potential safety hazards are eliminated. The output voltage of each battery is 20V-60V.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A switching circuit with an automatic battery selection function is characterized by comprising a public output module (1) and at least two groups of battery discharging modules (2), wherein the at least two groups of battery discharging modules (2) are coupled with the public output module (1) in parallel;
each group of the battery discharge modules (2) includes:
the battery input submodule (3) is used for accessing an external battery;
an automatic identification submodule (4) for identifying the presence of a reverse current: if the reverse current is identified, outputting a disconnection driving signal; if the reverse current is not identified, outputting a conduction driving signal;
and the switch submodule (5) is used for executing the operation of disconnecting the battery input submodule (3) from the common output module (1) according to the received disconnection driving signal or executing the operation of connecting the battery input submodule (3) with the common output module (1) according to the received connection driving signal.
2. The switching circuit with automatic battery selection function according to claim 1, wherein the battery input submodule (3) comprises a positive input terminal and a negative input terminal;
the automatic identification submodule (4) comprises an identification controller (6), and the identification controller (6) comprises a first input pin, a second input pin and an output pin;
the switch submodule (5) comprises a switch component, and the switch component comprises a control end, a first access end and a second access end;
the common output module (1) comprises a common positive output end and a common negative output end;
the first input pin is coupled to the positive input terminal, and the positive input terminal is coupled to the common positive output terminal;
the negative input end is coupled with the second input pin, and the output pin is coupled with the control end;
the negative input end and the second input pin are both coupled with the first access end, the second access end is grounded, and the second access end is coupled with the public negative output end.
3. The switching circuit with automatic battery selection function according to claim 2, wherein the identification controller (6) employs a JW3332 chip, the first input pin is a first pin of the JW3332 chip, and a fourth pin of the JW3332 chip is coupled to the first pin of the JW3332 chip;
the second input pin is a fifth pin of the JW3332 chip, the output pin is an eighth pin of the JW3332 chip, and a sixth pin of the JW3332 chip is grounded.
4. The switching circuit with the function of automatically selecting the battery according to claim 2, wherein the switch submodule (5) comprises a plurality of switch elements, each of the plurality of switch elements adopts a first NMOS transistor, the control terminal is a gate of the first NMOS transistor, the first access terminal is a drain of the first NMOS transistor, and the second access terminal is a source of the first NMOS transistor; the first NMOS tubes are connected in parallel.
5. The switching circuit with automatic battery selection function according to claim 1, characterized in that the number of battery discharge modules (2) is at least three groups, at least three groups of battery discharge modules (2) being each coupled in parallel with the common output module (1).
6. The switching circuit with the function of automatically selecting the battery according to claim 2, wherein a filtering component is connected in parallel between the common positive output end and the common negative output end.
7. The switching circuit with the function of automatically selecting the battery as claimed in claim 3, wherein a first current limiting device is connected between the first pin of each JW3332 chip and the corresponding first input pin, and a second current limiting device is connected between the first pin of each JW3332 chip and the fourth pin of the JW3332 chip.
8. The switching circuit with the function of automatically selecting batteries according to claim 3, wherein a third current limiting component is connected between the eighth pin of each JW3332 chip and the corresponding control terminal.
9. The switching circuit with the function of automatically selecting batteries according to claim 3, wherein a fourth current limiting component is connected between the fifth pin of each JW3332 chip and the corresponding first access terminal.
10. A power supply device, characterized by comprising batteries and a switching circuit with an automatic battery selection function according to any one of claims 1 to 9, the number of groups of said battery discharge modules (2) of said switching circuit being the same as the number of said batteries, the output of one of said batteries being connected to said battery input submodule (3) of a corresponding group of said battery discharge modules (2).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235179.5A CN114172258A (en) | 2021-10-22 | 2021-10-22 | Switching circuit with automatic battery selection function and power supply device thereof |
| PCT/CN2021/136964 WO2023065486A1 (en) | 2021-10-22 | 2021-12-10 | Switching circuit having automatic battery selection function, and power supply device having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235179.5A CN114172258A (en) | 2021-10-22 | 2021-10-22 | Switching circuit with automatic battery selection function and power supply device thereof |
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| CN114172258A true CN114172258A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111235179.5A Pending CN114172258A (en) | 2021-10-22 | 2021-10-22 | Switching circuit with automatic battery selection function and power supply device thereof |
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| Country | Link |
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| CN (1) | CN114172258A (en) |
| WO (1) | WO2023065486A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085342A (en) * | 2022-08-18 | 2022-09-20 | 深圳市德兰明海科技有限公司 | Energy storage system and method for identifying connection interface between inverter and battery pack |
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| CN105914872A (en) * | 2016-06-28 | 2016-08-31 | 瑞立集团瑞安汽车零部件有限公司 | Dual-power-supply control apparatus used for new energy automobile |
| CN211655737U (en) * | 2020-03-09 | 2020-10-09 | 浙江阿尔郎科技有限公司 | Battery protection circuit |
| CN113131076A (en) * | 2021-04-13 | 2021-07-16 | 深圳市圭石南方科技发展有限公司 | Battery system capable of being expanded in parallel |
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| JP2017112802A (en) * | 2015-12-18 | 2017-06-22 | パナソニックＩｐマネジメント株式会社 | Charging/discharging unit, power supply unit using the same, charging/discharging system and power supply system |
| WO2018053741A1 (en) * | 2016-09-22 | 2018-03-29 | 深圳市大疆创新科技有限公司 | Control method of battery pack, control system, storage medium, and unmanned aerial vehicle |
| JP2020054169A (en) * | 2018-09-28 | 2020-04-02 | 工機ホールディングス株式会社 | Electrical machine |
| CN110474395A (en) * | 2019-08-27 | 2019-11-19 | 常州格力博有限公司 | Electric system |
| CN214176930U (en) * | 2020-10-09 | 2021-09-10 | 王声镇 | Multi-power supply switching circuit |
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2021
- 2021-10-22 CN CN202111235179.5A patent/CN114172258A/en active Pending
- 2021-12-10 WO PCT/CN2021/136964 patent/WO2023065486A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914872A (en) * | 2016-06-28 | 2016-08-31 | 瑞立集团瑞安汽车零部件有限公司 | Dual-power-supply control apparatus used for new energy automobile |
| CN211655737U (en) * | 2020-03-09 | 2020-10-09 | 浙江阿尔郎科技有限公司 | Battery protection circuit |
| CN113131076A (en) * | 2021-04-13 | 2021-07-16 | 深圳市圭石南方科技发展有限公司 | Battery system capable of being expanded in parallel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115085342A (en) * | 2022-08-18 | 2022-09-20 | 深圳市德兰明海科技有限公司 | Energy storage system and method for identifying connection interface between inverter and battery pack |
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| WO2023065486A1 (en) | 2023-04-27 |
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