CN209994160U - Emergency power supply charge-discharge control circuit and emergency lighting equipment - Google Patents
Emergency power supply charge-discharge control circuit and emergency lighting equipment Download PDFInfo
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- CN209994160U CN209994160U CN201920838684.0U CN201920838684U CN209994160U CN 209994160 U CN209994160 U CN 209994160U CN 201920838684 U CN201920838684 U CN 201920838684U CN 209994160 U CN209994160 U CN 209994160U
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Abstract
The utility model provides an emergency power supply charge-discharge control circuit and an emergency lighting device, wherein the emergency power supply charge-discharge control circuit comprises a control circuit, an emergency switch circuit and a feedback locking circuit; the control circuit is used for detecting whether commercial power is connected into the rechargeable battery or not, sending a battery discharging instruction to the emergency switch circuit when no commercial power is connected, and sending a discharging finishing instruction to the emergency switch circuit when commercial power is connected; one end of the emergency switch circuit is used for connecting the rechargeable battery, and the other end of the emergency switch circuit is used for connecting the load end; the emergency switch circuit is also used for keeping the rechargeable battery disconnected from the load end when no commercial power is connected and the rechargeable battery is connected for the first time; one end of the feedback locking circuit is used for being connected with the load end, and the other end of the feedback locking circuit is connected with the emergency switch circuit and used for feeding back the voltage of the load end to the emergency switch circuit after the rechargeable battery is communicated with the load end. The utility model discloses multiplicable emergency lighting equipment's security to improve user experience degree.
Description
Technical Field
The utility model relates to an emergency lighting technology field particularly, relates to an emergency power supply charge-discharge control circuit and emergency lighting equipment.
Background
In the existing emergency lighting equipment, the condition that a user installs different mains supplies for the first time is not considered, so that the emergency lighting equipment starts lighting in the installation process, the danger coefficient of the personal safety of the user is increased, and the safety of the emergency lighting equipment is low.
Moreover, when the emergency lighting equipment is put into a required working environment, regular emergency tests are required to be carried out, and the reliability of the product can be ensured, but the existing emergency lighting equipment does not have the function of carrying out the emergency tests, so that the reliability of the product and the experience degree of a user are greatly influenced.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides an emergency power supply charge-discharge control circuit and emergency lighting equipment to increase emergency lighting equipment's security, improve user experience degree.
In order to achieve the above object, the utility model adopts the following technical scheme:
an emergency power supply charge-discharge control circuit comprises a control circuit, an emergency switch circuit and a feedback locking circuit;
the control circuit is used for detecting whether commercial power is connected into a rechargeable battery or not, sending a battery discharging instruction to the emergency switch circuit to switch on the rechargeable battery and a load end when the commercial power is not connected, and sending a discharging ending instruction to the emergency switch circuit to switch off the connection between the rechargeable battery and the load end when the commercial power is connected;
one end of the emergency switch circuit is used for connecting the rechargeable battery, and the other end of the emergency switch circuit is used for connecting the load end;
the emergency switch circuit is also used for keeping the rechargeable battery disconnected from the load end when the commercial power is not accessed and the rechargeable battery is connected for the first time;
one end of the feedback locking circuit is used for being connected with the load end, the other end of the feedback locking circuit is connected with the emergency switch circuit, and the feedback locking circuit is used for feeding back the voltage of the load end to the emergency switch circuit after the rechargeable battery is communicated with the load end, so that the emergency switch circuit keeps the communication state of the rechargeable battery and the load end.
Preferably, the emergency power supply charge-discharge control circuit further comprises a test circuit;
the test circuit is connected with the control circuit and used for generating a test instruction and sending the test instruction to the control circuit, so that the control circuit generates a battery discharge instruction and sends the battery discharge instruction to the emergency switch circuit.
Preferably, in the emergency power supply charge-discharge control circuit, the control circuit includes a first triode, a first diode, a first resistor, a second resistor, a third resistor and an electrolytic capacitor;
the base electrode of the first triode is connected with the negative electrode of the first diode through the second resistor and is grounded through the third resistor, the collector electrode of the first triode is connected with the negative electrode of the first diode through the first resistor and is connected with the base electrode of the first triode through the first resistor and the second resistor, and the emitter electrode of the first triode is grounded;
the anode of the first diode is used for being connected with the mains supply, and a fourth resistor is connected between the anode of the first diode and the mains supply;
and the anode of the electrolytic capacitor is connected with the cathode of the first diode, and the cathode of the electrolytic capacitor is grounded.
Preferably, in the emergency power supply charge-discharge control circuit, the first triode is an NPN-type triode.
Preferably, in the emergency power supply charge-discharge control circuit, the emergency switch circuit includes a second triode, a first MOS transistor, a fifth resistor, and a sixth resistor;
the base electrode of the second triode is connected with the collector electrode of the first triode, the emitting electrode of the second triode is grounded and is connected with the base electrode of the second triode through the fifth resistor, and the collector electrode of the second triode is connected with the grid electrode of the first MOS tube;
and the source electrode of the first MOS tube is used for connecting the rechargeable battery and is connected with the grid electrode of the first MOS tube through the sixth resistor, and the drain electrode of the first MOS tube is used for connecting a load end.
Preferably, in the emergency power supply charge-discharge control circuit, the second triode is an NPN-type triode.
Preferably, in the emergency power supply charge-discharge control circuit, the first MOS transistor is a PMOS transistor.
Preferably, in the emergency power supply charge-discharge control circuit, the test circuit includes a key switch and the fourth resistor;
one end of the key switch is used for being connected with the mains supply through the fourth resistor and is connected with the anode of the first diode, and the other end of the key switch is grounded.
Preferably, in the emergency power supply charge-discharge control circuit, the feedback locking circuit includes a second diode, a seventh resistor, and an eighth resistor;
the anode of the second diode is connected with the drain of the first MOS tube through the seventh resistor and is grounded through the eighth resistor, and the cathode of the second diode is connected with the base of the second triode.
The utility model also provides an emergency lighting device, include emergency power supply charge-discharge control circuit.
The utility model provides an emergency power supply charge-discharge control circuit, which comprises a control circuit, an emergency switch circuit and a feedback locking circuit; the control circuit is used for detecting whether commercial power is connected into a rechargeable battery or not, sending a battery discharging instruction to the emergency switch circuit to switch on the rechargeable battery and a load end when the commercial power is not connected, and sending a discharging ending instruction to the emergency switch circuit to switch off the connection between the rechargeable battery and the load end when the commercial power is connected; one end of the emergency switch circuit is used for connecting the rechargeable battery, and the other end of the emergency switch circuit is used for connecting the load end; the emergency switch circuit is also used for keeping the rechargeable battery disconnected from the load end when the commercial power is not accessed and the rechargeable battery is connected for the first time; one end of the feedback locking circuit is used for being connected with the load end, the other end of the feedback locking circuit is connected with the emergency switch circuit, and the feedback locking circuit is used for feeding back the voltage of the load end to the emergency switch circuit after the rechargeable battery is communicated with the load end, so that the emergency switch circuit keeps the communication state of the rechargeable battery and the load end. The utility model discloses an emergency power supply charge-discharge control circuit controls this rechargeable battery not for the load end power supply when connecting rechargeable battery for the first time, increases emergency lighting equipment's security, improves user experience degree.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to illustrate the technical solution of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a schematic structural diagram of an emergency power supply charge and discharge control circuit provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of an emergency power supply charge and discharge control circuit provided in embodiment 2 of the present invention;
fig. 3 is a schematic circuit diagram of an emergency power supply charging and discharging control circuit provided in embodiment 3 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Fig. 1 is a schematic structural diagram of an emergency power supply charge and discharge control circuit provided in embodiment 1 of the present invention.
The emergency power supply charging and discharging control circuit 100 comprises a control circuit 110, an emergency switch circuit 120 and a feedback locking circuit 130;
the control circuit 110 is configured to detect whether a commercial power 140 is connected to the rechargeable battery 150, generate a battery discharge instruction and send the battery discharge instruction to the emergency switch circuit 120 when the commercial power 140 is not connected, and generate a discharge ending instruction and send the battery discharge ending instruction to the emergency switch circuit 120 when the commercial power 140 is connected;
the embodiment of the utility model provides an in, this emergency power supply charge-discharge control circuit 100 can be used with emergency lighting equipment in, for example, emergency lighting lamp. The emergency power supply charging and discharging control circuit 100 includes a control circuit 110, where the control circuit 110 is used to connect to the input end of the commercial power 140, and detect whether the commercial power 140 is input into the rechargeable battery 150 of the emergency lighting device. When detecting that the commercial power 140 is connected to the rechargeable battery 150, a discharge ending instruction may be generated and sent to the emergency switch circuit 120, so that the rechargeable battery 150 ends discharging, and the power supply to the load terminal 160 is ended, or the rechargeable battery 150 is kept disconnected from the load terminal 160, and the rechargeable battery 150 supplements the electric energy by using the commercial power 140.
The embodiment of the utility model provides an in, detect at control circuit 110 and do not have commercial power 140 to insert rechargeable battery 150, perhaps commercial power 140 and rechargeable battery 150 when breaking off, can generate the battery and discharge the instruction and send to emergency switch circuit 120, make rechargeable battery 150 discharge to load end 160, drive this load end 160 and work, for example in emergency lighting lamp, then can generate the battery and discharge instruction to emergency switch circuit 120 when commercial power 140 breaks off, make emergency switch circuit 120 control rechargeable battery 150 discharge and supply power for load end 160.
One end of the emergency switch circuit 120 is configured to be connected to the rechargeable battery 150, and the other end thereof is configured to be connected to the load terminal 160, and is configured to connect the rechargeable battery 150 and the load terminal 160 after receiving the battery discharging instruction, so that the rechargeable battery 150 supplies power to the load terminal 160, and disconnect the rechargeable battery 150 and the load terminal 160 after receiving the discharging ending instruction;
the embodiment of the utility model provides an in, this emergency power supply charge-discharge control circuit 100 is including emergency switch circuit 120, and rechargeable battery 150 is connected to this emergency switch circuit 120 one end, and load end 160 is connected to one end, is equivalent to the switch between rechargeable battery 150 and the load end 160, when having commercial power 140 to insert rechargeable battery 150 and charge for rechargeable battery 150, this switch keeps the off-state, and this switch keeps the on-state when no commercial power 140 inserts rechargeable battery 150 to make rechargeable battery 150 charge for load end 160.
The emergency switch circuit 120 is configured to keep the rechargeable battery 150 disconnected from the load terminal 160 when the utility power 140 is not connected and the rechargeable battery 150 is connected for the first time;
the embodiment of the utility model provides an in, this emergency switch circuit 120 can also be used for detecting this emergency power supply charge-discharge control circuit 100 and not install for the first time, also detect whether emergency lighting equipment installs for the first time. When the emergency power supply charging and discharging control circuit 100 is installed for the first time and the rechargeable battery 150 is connected for the first time under the condition that no commercial power 140 is connected, the emergency switch circuit 120 can keep the rechargeable battery 150 disconnected from the load end 160, so that the rechargeable battery 150 is prevented from supplying power to the load end 160, and the emergency lighting equipment is safer in the installation process.
The feedback locking circuit 130 is configured to connect the load terminal 160 at one end, and connect the emergency switch circuit 120 at the other end, and configured to feed back the voltage of the load terminal 160 to the emergency switch circuit 120 after the rechargeable battery 150 is connected to the load terminal 160, so that the emergency switch circuit 120 maintains the connection state between the rechargeable battery 150 and the load terminal 160.
The embodiment of the utility model provides an in, this emergency power supply charge-discharge control circuit 100 still includes feedback locking circuit 130, load end 160 is connected to this feedback locking circuit 130 one end, also be the output of emergency switch circuit 120, emergency switch circuit 120's input drive end is connected to the other end, form the closed loop when rechargeable battery 150 connects load end 160 and discharges, let emergency switch circuit 120 lock the state of rechargeable battery 150 and load end 160 intercommunication, voltage drop to the default up to rechargeable battery 150, thereby guarantee that emergency lighting equipment can keep luminous, and the protection battery can not overdischarge.
Example 2
Fig. 2 is a schematic structural diagram of an emergency power supply charge and discharge control circuit provided in embodiment 2 of the present invention.
The emergency power supply charging and discharging control circuit 200 comprises a control circuit 210, an emergency switch circuit 220 and a feedback locking circuit 230;
the control circuit 210 is configured to detect whether a commercial power 240 is connected to the rechargeable battery 250, generate a battery discharge instruction and send the battery discharge instruction to the emergency switch circuit 220 when the commercial power 240 is not connected, and generate a discharge ending instruction and send the battery discharge ending instruction to the emergency switch circuit 220 when the commercial power 240 is connected;
one end of the emergency switch circuit 220 is configured to be connected to the rechargeable battery 250, and the other end of the emergency switch circuit is configured to be connected to a load end 260, and is configured to connect the rechargeable battery 250 and the load end 260 after receiving the battery discharge instruction, so that the rechargeable battery 250 supplies power to the load end 260, and disconnect the rechargeable battery 250 from the load end 260 after receiving the discharge ending instruction;
the emergency switch circuit 220 is configured to keep the rechargeable battery 250 disconnected from the load terminal 260 when the commercial power 240 is not connected and the rechargeable battery 250 is connected for the first time;
the feedback locking circuit 230 has one end connected to the load terminal 260 and the other end connected to the emergency switching circuit 220, and is configured to feed back the voltage of the load terminal 260 to the emergency switching circuit 220 after the rechargeable battery 250 is connected to the load terminal 260, so that the emergency switching circuit 220 maintains the connection state between the rechargeable battery 250 and the load terminal 260.
Also included is a test circuit 270; the test circuit 270 is connected to the control circuit 210, and configured to generate a test instruction and send the test instruction to the control circuit 210, so that the control circuit 210 generates the battery discharge instruction and sends the battery discharge instruction to the emergency switch circuit 220.
The embodiment of the utility model provides an in, still including test circuit 130 in this emergency power supply charge-discharge control circuit 100, this test circuit 130 connection control circuit 110, can insert rechargeable battery 150 at commercial power 140, this rechargeable battery 150 generates test instruction under the condition of load end 160 disconnection and sends to control circuit 110, make control circuit 110 generate battery discharge instruction and send to protection switch, make protection switch control rechargeable battery 150 and load end 160 intercommunication, thereby test circuit 130, rechargeable battery 150 and load end 160 have or not trouble, so that in time carry out emergency lighting equipment's maintenance.
Example 3
Fig. 3 is a schematic circuit diagram of an emergency power supply charging and discharging control circuit provided in embodiment 3 of the present invention.
The emergency power supply charging and discharging control circuit 300 comprises a control circuit 310, an emergency switch circuit 320 and a test circuit 330;
the control circuit 310 is configured to detect whether a commercial power 340 is connected to the rechargeable battery 350, generate a battery discharge instruction and send the battery discharge instruction to the emergency switch circuit 320 when the commercial power 340 is not connected, and generate a discharge ending instruction and send the battery discharge ending instruction to the emergency switch circuit 320 when the commercial power 340 is connected;
in the embodiment of the present invention, the control circuit 310 includes a first triode 311, a first diode 312, a first resistor 313, a second resistor 314, a third resistor 315, and an electrolytic capacitor 316; the base electrode of the first triode 311 is connected with the negative electrode of the first diode 312 and is grounded, the collector electrode of the first triode 311 is connected with the negative electrode of the first diode 312 and is connected with the base electrode of the first triode 311, and the emitter electrode of the first triode 311 is grounded; the anode of the first diode 312 is used for connecting the commercial power, and a fourth resistor is connected between the anode of the first diode 312 and the commercial power; the first resistor 313 is connected between the collector of the first triode 311 and the negative electrode of the first diode 312, the second resistor 314 is connected between the base of the first triode 311 and the negative electrode of the first diode 312, and the third resistor 315 is connected between the base of the first triode 311 and the ground; the anode of the electrolytic capacitor 316 is connected to the cathode of the first diode 312, and the cathode of the electrolytic capacitor 316 is grounded. The first transistor 311 is an NPN transistor.
One end of the emergency switch circuit 320 is used for connecting the rechargeable battery 350, and the other end of the emergency switch circuit is used for connecting the rechargeable battery 350 and the load end 360 after receiving the battery discharging instruction, so that the rechargeable battery 350 supplies power to the load end 360, and the connection between the rechargeable battery 350 and the load end 360 is disconnected after receiving the discharging instruction;
the emergency switch circuit 320 is used for keeping the rechargeable battery 350 disconnected from the load terminal 360 when the commercial power 340 is not connected and the rechargeable battery 350 is connected for the first time;
in the embodiment of the present invention, the emergency switch circuit 320 includes a second triode 321, a first MOS transistor 322, a fifth resistor 323, and a sixth resistor 324; the base electrode of the second triode 321 is connected with the collector electrode of the first triode 311, the emitter electrode of the second triode 321 is grounded and connected with the base electrode of the second triode 321, and the collector electrode of the second triode 321 is connected with the gate electrode of the first MOS transistor 322; the source of the first MOS transistor 322 is used for connecting the rechargeable battery and the gate of the first MOS transistor 322, and the drain of the first MOS transistor 322 is used for connecting a load end; the fifth resistor 323 is connected between the base and the emitter of the second transistor 321, and the sixth resistor 324 is connected between the source and the gate of the first MOS transistor 322. The second transistor 321 is an NPN transistor, and the first MOS transistor 322 is a PMOS transistor.
The test circuit 330 is connected to the control circuit 310, and configured to generate a test instruction and send the test instruction to the control circuit 310, so that the control circuit 310 generates the battery discharge instruction and sends the battery discharge instruction to the emergency switch circuit 320.
In the embodiment of the present invention, the test circuit 330 includes a key switch 331 and the fourth resistor 332; one end of the key switch 331 is used for connecting the mains supply and is connected to the anode of the first diode 312, and the other end of the key switch 331 is grounded; the fourth resistor 332 is connected between the key switch 331 and the mains supply.
Also included is a feedback lock circuit 370; one end of the feedback locking circuit 370 is used for connecting the load terminal 360, and the other end is connected to the emergency switch circuit 320, and is used for feeding back the voltage transmitted from the rechargeable battery 350 to the load terminal 360 to the emergency switch circuit 320 after the rechargeable battery 350 is connected to the load terminal 360, so as to drive the emergency switch circuit 320 to lock the connection state between the rechargeable battery 350 and the load terminal 360.
In the embodiment of the present invention, the feedback locking circuit 370 includes a second diode 371, a seventh resistor 372, and an eighth resistor 373; the anode of the second diode 371 is connected to the drain of the first MOS transistor 322 and grounded, and the cathode of the second diode 371 is connected to the base of the second triode 321; a seventh resistor 372 is connected between the anode of the second diode 371 and the drain of the first MOS transistor 322, and an eighth resistor 373 is connected between the anode of the second diode 371 and ground.
The embodiment of the utility model provides an in, when the user is connected emergency power supply charge-discharge control circuit 300 and rechargeable battery 350 for the first time, because there is not the commercial power 340 access, consequently first triode 311 and second triode 321 do not switch on, rechargeable battery 350's voltage transmission is to the source electrode of first MOS pipe 322, and transmit rechargeable battery 350's voltage to first MOS pipe 322's grid through sixth resistance 324, because the grid is the same with the source electrode voltage, consequently first MOS pipe 322 does not switch on, rechargeable battery 350 keeps the disconnection with load end 360, consequently, load end 360 is out of work.
In the embodiment of the present invention, when the commercial power 340 is connected to the rechargeable battery 350, the commercial power 340 charges the rechargeable battery 350. The electric energy inputted by the utility power 340 is also transmitted to the base of the first triode 311 through the fourth resistor 332, the first diode 312 and the second resistor 314, and the base of the first triode 311 is grounded through the third resistor 315. When the divided voltage value of the voltage of the commercial power 340 received by the first transistor 311 is greater than 0.7V, the first transistor 311 is turned on, and the collector of the first transistor 311 is pulled low, i.e., the base of the second transistor 321 is at a low level, so that the second transistor 321 is not turned on. Under the condition that the second transistor 321 is not turned on, the gate and the source of the first MOS 322 are both the same voltage of the rechargeable battery 350, so that the first MOS 322 is not turned on, and the load terminal 360 cannot obtain the electric energy of the rechargeable battery 350 for operation.
The embodiment of the utility model provides an in, after commercial power 340 outage, commercial power 340's voltage can drop to 0V gradually to through the partial pressure ratio of the second resistance 314 and the third resistance 315 that set up the connection, make first triode 311's base voltage decline, when first triode 311's base voltage drops below 0.7V, first triode 311 does not switch on. At this time, by setting the voltage division ratio between the first resistor 313 and the fifth resistor 323, the second transistor 321 is turned on, so that the collector of the second transistor 321 is pulled low, the gate voltage of the first MOS transistor 322 is greater than the turn-on threshold voltage, the first MOS transistor 322 is turned on, and the rechargeable battery 350 is connected to the load terminal 360 and starts to supply power. The voltage of the rechargeable battery 350 is divided by the seventh resistor 372 and the eighth resistor 373 and then transmitted to the base of the second transistor 321 through the second diode 371, so that a closed loop is formed to keep the second transistor 321 turned on, and the input voltage of the commercial power 340 is reduced to 0V in time, which does not affect the on state of the first MOS transistor 322. In addition, by setting the voltage division ratio of the seventh resistor 372 and the eighth resistor 373, a discharge protection voltage point of the battery voltage can be set to prevent the over-discharge of the battery.
The embodiment of the utility model provides an in, when commercial power 340 switched on again, first triode 311 switches on, then the collecting electrode of first triode 311 is drawn lowly, and the base of second triode 321 connects the low level promptly, then second triode 321 does not switch on, and first MOS pipe 322 also does not switch on, and rechargeable battery 350 does not switch on with load end 360, and load end 360 stop work.
The embodiment of the utility model provides an in, test circuit's key switch 331 includes plastic packaging's dabbing self-resuming button, is normally open state under normal conditions, is in closed state when pressing. After the key switch 331 is turned on, the two ends of the key are grounded, that is, the positive terminal of the first diode 312 is at a low level, at this time, the electric quantity in the positive terminal of the electrolytic capacitor 316 is gradually consumed by the first resistor 313, the second resistor 314, the third resistor 315 and the fifth resistor 323, the voltage of the positive terminal of the electrolytic capacitor 316 gradually decreases, when the base voltage supplied to the first triode 311 after the voltage division of the second resistor 314 and the third resistor 315 is less than 0.7V, the first triode 311 is not conducted, and the voltage division ratio of the first resistor 313 and the fifth resistor 323 is set to conduct the second triode 321. When the second transistor 321 is turned on, the first MOS transistor 322 is turned on, and the rechargeable battery 350 starts to supply power to the load terminal 360, so as to perform the emergency test.
The utility model also provides an emergency lighting device, emergency power source charge-discharge control circuit in above-mentioned embodiment.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The emergency power supply charge-discharge control circuit is characterized by comprising a control circuit, an emergency switch circuit and a feedback locking circuit;
the control circuit is used for detecting whether commercial power is connected into a rechargeable battery or not, sending a battery discharging instruction to the emergency switch circuit to switch on the rechargeable battery and a load end when the commercial power is not connected, and sending a discharging ending instruction to the emergency switch circuit to switch off the connection between the rechargeable battery and the load end when the commercial power is connected;
one end of the emergency switch circuit is used for connecting the rechargeable battery, and the other end of the emergency switch circuit is used for connecting the load end;
the emergency switch circuit is also used for keeping the rechargeable battery disconnected from the load end when the commercial power is not accessed and the rechargeable battery is connected for the first time;
one end of the feedback locking circuit is used for being connected with the load end, the other end of the feedback locking circuit is connected with the emergency switch circuit, and the feedback locking circuit is used for feeding back the voltage of the load end to the emergency switch circuit after the rechargeable battery is communicated with the load end, so that the emergency switch circuit keeps the communication state of the rechargeable battery and the load end.
2. The emergency power supply charge-discharge control circuit according to claim 1, further comprising a test circuit;
the test circuit is connected with the control circuit and used for generating a test instruction and sending the test instruction to the control circuit, so that the control circuit generates a battery discharge instruction and sends the battery discharge instruction to the emergency switch circuit.
3. The emergency power supply charging and discharging control circuit according to claim 2, wherein the control circuit comprises a first triode, a first diode, a first resistor, a second resistor, a third resistor and an electrolytic capacitor;
the base electrode of the first triode is connected with the negative electrode of the first diode through the second resistor and is grounded through the third resistor, the collector electrode of the first triode is connected with the negative electrode of the first diode through the first resistor and is connected with the base electrode of the first triode through the first resistor and the second resistor, and the emitter electrode of the first triode is grounded;
the anode of the first diode is used for being connected with the mains supply, and a fourth resistor is connected between the anode of the first diode and the mains supply;
and the anode of the electrolytic capacitor is connected with the cathode of the first diode, and the cathode of the electrolytic capacitor is grounded.
4. The emergency power supply charge-discharge control circuit according to claim 3, wherein the first triode is an NPN-type triode.
5. The emergency power supply charge-discharge control circuit according to claim 3, wherein the emergency switch circuit comprises a second triode, a first MOS (metal oxide semiconductor) transistor, a fifth resistor and a sixth resistor;
the base electrode of the second triode is connected with the collector electrode of the first triode, the emitting electrode of the second triode is grounded and is connected with the base electrode of the second triode through the fifth resistor, and the collector electrode of the second triode is connected with the grid electrode of the first MOS tube;
and the source electrode of the first MOS tube is used for connecting the rechargeable battery and is connected with the grid electrode of the first MOS tube through the sixth resistor, and the drain electrode of the first MOS tube is used for connecting a load end.
6. The emergency power supply charge-discharge control circuit according to claim 5, wherein the second triode is an NPN triode.
7. The emergency power supply charge-discharge control circuit according to claim 5, wherein the first MOS transistor is a PMOS transistor.
8. The emergency power supply charge-discharge control circuit according to claim 3, wherein the test circuit comprises a key switch and the fourth resistor;
one end of the key switch is used for being connected with the mains supply through the fourth resistor and is connected with the anode of the first diode, and the other end of the key switch is grounded.
9. The emergency power supply charging and discharging control circuit according to claim 5, wherein the feedback locking circuit comprises a second diode, a seventh resistor and an eighth resistor;
the anode of the second diode is connected with the drain of the first MOS tube through the seventh resistor and is grounded through the eighth resistor, and the cathode of the second diode is connected with the base of the second triode.
10. An emergency lighting device comprising the emergency power supply charge-discharge control circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920838684.0U CN209994160U (en) | 2019-06-04 | 2019-06-04 | Emergency power supply charge-discharge control circuit and emergency lighting equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920838684.0U CN209994160U (en) | 2019-06-04 | 2019-06-04 | Emergency power supply charge-discharge control circuit and emergency lighting equipment |
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| CN209994160U true CN209994160U (en) | 2020-01-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071575A (en) * | 2019-06-04 | 2019-07-30 | 深圳莱福德科技股份有限公司 | Emergency power supply charge-discharge control circuit and emergency-lighting set |
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2019
- 2019-06-04 CN CN201920838684.0U patent/CN209994160U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071575A (en) * | 2019-06-04 | 2019-07-30 | 深圳莱福德科技股份有限公司 | Emergency power supply charge-discharge control circuit and emergency-lighting set |
| CN110071575B (en) * | 2019-06-04 | 2024-05-03 | 深圳莱福德科技股份有限公司 | Emergency power supply charge-discharge control circuit and emergency lighting equipment |
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