CN218242990U - Low-voltage detection circuit and solar equipment with same - Google Patents
Low-voltage detection circuit and solar equipment with same Download PDFInfo
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- CN218242990U CN218242990U CN202222613828.7U CN202222613828U CN218242990U CN 218242990 U CN218242990 U CN 218242990U CN 202222613828 U CN202222613828 U CN 202222613828U CN 218242990 U CN218242990 U CN 218242990U
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Abstract
The utility model provides a low-voltage detection circuit and have this detection circuit's solar equipment, including battery power supply and direct current auxiliary power supply, battery power supply with direct current auxiliary power supply's negative pole ground connection, battery power supply's anodal source electrode and the one end of pull-up resistance with first transistor are connected, the drain electrode and the circuit voltage output end of first transistor are connected, the grid of first transistor with the other end of pull-up resistance and the drain electrode of second transistor are connected, the source electrode ground connection of second transistor, the grid of second transistor is connected with the output of voltage detection chip. The utility model discloses can avoid battery voltage to be close to the problem of the chip quick switch machine in the power consumption module when not having the electricity.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to a low voltage detection circuitry and have this detection circuitry's solar equipment.
Background
Solar energy equipment is equipment which utilizes a solar panel to generate electricity and works by adopting the electricity. The solar energy equipment is particularly suitable for the field that the outdoor can receive illumination, and the supplement of electric energy can be realized through solar power generation, so that the endurance time of the equipment is greatly prolonged. However, the solar energy device has the obvious defect that the solar energy cannot be acquired at night. In order to realize the operation of the solar energy device at night, an additional power supply is needed for supplying power. The additional power source is typically a battery or batteries. The storage battery needs energy storage and control, is high in cost, is generally used on equipment with high energy consumption, and realizes power supply at night by storing solar energy in the daytime. The battery is generally used on equipment with low energy consumption, and is complementary with solar power generation, so that the solar power is used in the daytime, and the battery power is used at night, so that the long-time work of the equipment is realized.
In the equipment with the battery and the solar panel, in order to realize the preferential power supply and the uninterrupted power supply of the solar panel, the solar panel is connected through two diodes, as shown in figure 1, so that when the solar panel is electrified, the voltage of the solar panel is greater than the voltage of the battery, the diode connected with the solar panel is conducted, the diode connected with the battery is cut off, and the power supply of the solar panel is realized. When the solar panel is not powered, the diode connected with the solar panel is cut off, and the diode connected with the battery is conducted, so that the power supply of the battery is realized. The structure is simple, and the problem does not exist in normal use. However, when the battery is used and the solar panel is not powered at night, the voltage of the battery is reduced, the chip of the power utilization module is shut down and protected due to the fact that the voltage of the chip is lower than the normal working voltage, the battery consumes no electric energy, the voltage of the battery is slowly increased, the chip which is just increased to the power utilization module is started, the voltage of the battery is rapidly reduced, the chip in the power utilization module is automatically shut down, the chip is quickly and frequently started, the starting time is too short, the chip of the power utilization module cannot complete basic work, and even the chip can work abnormally.
SUMMERY OF THE UTILITY MODEL
Therefore, it is desirable to provide a low voltage detection circuit and a solar device having the same, which can detect and control the low voltage of the battery and solve the problem of fast on/off of the chip in the power module when the battery voltage is close to zero.
In order to achieve the above object, the utility model provides a low voltage detection circuit, including battery power supply and direct current auxiliary power supply, battery power supply with direct current auxiliary power supply's negative pole ground connection, the anodal source electrode and the one end of pull-up resistance of first transistor of battery power supply are connected, the drain electrode and the circuit voltage output end of first transistor are connected, the grid of first transistor with the other end of pull-up resistance and the drain electrode of second transistor are connected, the source electrode ground connection of second transistor, the grid of second transistor is connected with the output of voltage detection chip, the earthing terminal ground connection of voltage detection chip, the input of voltage detection chip with the anodal of battery power supply is connected, the positive pole of first diode is connected to direct current auxiliary power supply's positive pole, the negative pole of first diode with circuit voltage output end is connected.
Further, the battery further comprises a second diode, and the connection of the anode of the battery power supply with the source of the first transistor and one end of the pull-up resistor comprises: the anode of the second diode is connected with the anode of the battery power supply, and the cathode of the second diode is connected with the source electrode of the first transistor and one end of the pull-up resistor.
Further, still include the third diode, the input of voltage detection chip with the anodal of battery power is connected includes: and the anode of the third diode is connected with the anode of the battery power supply, and the cathode of the third diode is connected with the input end of the voltage detection chip.
The transistor further comprises a fourth diode, wherein the anode of the fourth diode is connected with the source electrode of the first transistor, and the cathode of the fourth diode is connected with the drain electrode of the first transistor.
The transistor further comprises a fifth diode, wherein the anode of the fifth diode is connected with the source electrode of the second transistor, and the cathode of the fifth diode is connected with the drain electrode of the second transistor.
Furthermore, the transistor also comprises a current-limiting resistor, and the grid electrode of the first transistor is connected with the drain electrode of the second transistor through the current-limiting resistor.
Further, the first transistor or the second transistor is an MOS transistor.
The utility model provides a solar equipment with low-voltage detection circuit, including battery power supply, direct current auxiliary power supply and low-voltage detection circuit, battery power supply, direct current auxiliary power supply with low-voltage detection circuit connects, direct current auxiliary power supply is solar panel, low-voltage detection circuit be utility model embodiment arbitrary one low-voltage detection circuit.
Be different from prior art, above-mentioned technical scheme realizes the detection to battery power supply voltage through the voltage detection chip, and when battery power supply voltage is normal when voltage is higher promptly, the voltage detection chip output control signal gives the second transistor, and the second transistor switches on, and the grid of first transistor is pulled down, then first transistor switches on, and the electric current of battery power realizes normal output through first transistor to circuit voltage output. When the voltage of the battery power supply is too low, the voltage detection chip does not output a control signal to the second transistor, the second transistor is cut off, the grid electrode of the first transistor is pulled high by the pull-up resistor, the first transistor is cut off, and the current of the battery power supply cannot be output to the voltage output end of the circuit. Because the output control signal of voltage detection chip and the input voltage when not outputting control signal have the voltage difference, then realized just switching on when battery voltage is higher, and just close when battery voltage is lower, the space that battery supply voltage descends has been remain like this, thereby battery voltage is when no electricity later recovery voltage, can just export the chip of using electric module for when voltage recovery is higher and use, the chip of using electric module can have longer time to accomplish basic work like this, then battery does not have electric voltage detection chip closing current output. Therefore, the problem that the chip in the power utilization module is quickly turned on and off when the battery voltage is close to zero is solved.
Drawings
FIG. 1 is a schematic diagram of a battery and solar panel circuit according to the prior art;
fig. 2 is a schematic diagram of a circuit configuration according to a disclosed embodiment of the present invention;
FIG. 3 is a schematic diagram of a circuit configuration according to another disclosed embodiment of the present invention;
fig. 4 is a schematic structural view of a solar power plant of a disclosed embodiment of the invention;
fig. 5 is a schematic structural diagram of a power utilization module according to a disclosed embodiment of the invention.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended to describe specific embodiments only and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, indicating that three relationships may exist, for example, a and/or B, indicating that: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".
In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.
As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. Furthermore, the description of embodiments herein of the present application of the term "plurality" means more than two (including two), and the analogous meaning of "plurality" is also to be understood, e.g., "plurality", etc., unless explicitly specified otherwise.
In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the device or component in question must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application should be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application belongs according to specific situations.
Referring to fig. 2 to 5, the present invention provides a low voltage detection circuit, and a minimum circuit diagram structure is shown in fig. 2, including a battery POWER supply BT3 and a dc auxiliary POWER supply POWER, where the battery POWER supply BT3 is a battery for providing POWER, and the dc auxiliary POWER supply POWER can be a solar panel or other auxiliary dc POWER supplies, such as a wind POWER generator, a dc energy storage POWER supply, etc. The negative poles of the battery POWER supply BT3 and the dc auxiliary POWER supply POWER are grounded, the positive pole of the battery POWER supply BT3 is connected to the source of the first transistor Q8 and one end of the pull-up resistor R37, the drain of the first transistor Q8 is connected to the circuit voltage output terminal VBAT _ OUT, the gate of the first transistor Q8 is connected to the other end of the pull-up resistor R37 and the drain of the second transistor Q9, the source of the second transistor Q9 is grounded, the gate of the second transistor Q9 is connected to the output terminal of the voltage detection chip LOW _ BAT (which may be a three-pin voltage detection chip, and may be of the type HT 7039A-1), the ground terminal of the voltage detection chip LOW _ BAT is grounded, the input terminal of the voltage detection chip LOW _ BAT is connected to the positive pole of the battery POWER supply 3, the positive pole of the dc auxiliary POWER supply POWER is connected to the positive pole of the first diode D8, and the negative pole of the first diode D8 is connected to the circuit voltage output terminal VBAT _ OUT.
It should be noted that, in general, the voltage of the dc auxiliary POWER supply POWER is higher than the voltage of the battery POWER supply. When the direct-current auxiliary POWER supply POWER is powered on, the current of the direct-current auxiliary POWER supply POWER can flow to the circuit voltage output end VBAT _ OUT through the diode D8, and the circuit voltage output end VBAT _ OUT is connected with the following POWER utilization module to supply POWER to the following POWER utilization module. At this time, even if the first transistor is turned on, since the voltage of the dc auxiliary POWER supply POWER is higher than the voltage of the battery POWER supply, the current of the battery POWER supply does not flow to the circuit voltage output terminal VBAT _ OUT, so that the POWER supply of the dc auxiliary POWER supply POWER is realized. When the direct-current auxiliary POWER supply POWER is not powered on, the voltage detection chip LOW _ BAT detects the voltage of the battery POWER supply, when the voltage of the battery POWER supply is normal, namely the voltage is high, the voltage detection chip LOW _ BAT outputs a control signal to the second transistor Q9, the second transistor Q9 is conducted, the grid electrode of the first transistor Q8 is pulled LOW, the first transistor Q8 is conducted, the current of the battery POWER supply passes through the first transistor to the circuit voltage output end VBAT _ OUT, and the normal output of the battery POWER supply is realized. When the voltage of the battery power supply is too LOW, the LOW _ BAT of the voltage detection chip does not output a control signal to the second transistor Q9, the second transistor Q9 is turned off, the grid electrode of the first transistor is pulled high by the pull-up resistor R37, the first transistor is turned off, and the current of the battery power supply cannot be output to the voltage output end VBAT _ OUT of the circuit. Because the output control signal of voltage detection chip LOW _ BAT and the input voltage when not outputting control signal have the voltage difference, then realized just switching on when battery voltage is higher, and just close when battery voltage is lower, the space that battery power voltage descends has been reserved like this, thereby battery voltage is when no electricity later recovery voltage, can just export the chip use for power consumption module when voltage recovery is higher, the chip of power consumption module can have longer time to accomplish basic work like this, then battery does not have power voltage detection chip LOW _ BAT and closes current output. Therefore, the problem that the chip in the power utilization module is quickly turned on and off when the battery voltage is close to zero is solved.
Further, as shown in fig. 3, fig. 3 shows a more complete circuit diagram structure, and further includes a second diode D5, where the connection of the positive electrode of the battery power supply BT3 with the source of the first transistor Q8 and one end of the pull-up resistor R37 includes: the anode of the second diode D5 is connected to the anode of the battery power BT3, and the cathode of the second diode D5 is connected to the source of the first transistor Q8 and one end of the pull-up resistor R37. The second diode D5 can realize that the battery power supply BT3 can only output externally, so that the battery power supply BT3 is prevented from being charged.
Similarly, in order to realize that the battery power BT3 can only output externally, the third diode D6 is further included, and the connection between the input end of the voltage detection chip LOW _ BAT and the anode of the battery power BT3 includes: the anode of the third diode D6 is connected to the anode of the battery power BT3, and the cathode of the third diode D6 is connected to the input terminal of the voltage detection chip LOW _ BAT. Thus, the current of the battery power supply BT3 flows only to the input terminal of the voltage detection chip LOW _ BAT and does not flow in the reverse direction.
Further, the transistor further comprises a fourth diode D9, wherein an anode of the fourth diode D9 is connected to the source of the first transistor Q8, and a cathode of the fourth diode D9 is connected to the drain of the first transistor Q8. Through the fourth diode D9, when the voltage of the battery power supply is normal, even if the voltage detection chip LOW _ BAT does not turn on the first transistor Q8 when the voltage detection chip works abnormally, the current of the battery power supply can flow to the circuit voltage output end VBAT _ OUT through the fourth diode D9 to supply power to a following power utilization module, so that the problem that power cannot be supplied when a fault occurs is solved.
Further, the transistor also comprises a fifth diode D7, wherein the anode of the fifth diode D7 is connected with the source of the second transistor Q9, and the cathode of the fifth diode D7 is connected with the drain of the second transistor Q9. Reverse voltage control across the second transistor Q9 is achieved by a fifth diode D7.
The utility model discloses in, what voltage detection chip LOW _ BAT adopted is LOW power consumptive voltage detection chip, in order to further reduce the power consumption, the utility model discloses still include current-limiting resistor R38, first transistor Q8's grid passes through current-limiting resistor R38 with second transistor Q9's drain electrode is connected. The current limiting resistor R38 can reduce the current flowing when the second transistor Q9 is conducted, thereby saving electric energy and prolonging the service time of a battery power supply.
Further, the first transistor Q8 or the second transistor Q9 is a MOS transistor. The first transistor is PMOS, the second transistor is NMOS, the current is small when the MOS transistor is conducted, the electric energy loss can be reduced, and the service time of the battery power supply is prolonged.
The utility model provides a solar equipment with low voltage detection circuitry, as shown in FIG. 4, including battery POWER BT3, DC auxiliary POWER supply POWER and low voltage detection circuitry, battery POWER BT3, DC auxiliary POWER supply POWER with low voltage detection circuitry connects, DC auxiliary POWER supply POWER is solar panel, low voltage detection circuitry is one arbitrary low voltage detection circuitry of embodiment. Through LOW voltage detection circuit, can realize just switching on when battery voltage is higher, and just close when battery voltage is lower, the space that battery power supply voltage descends has been remain like this to battery voltage is when no electricity then recovery voltage, can just export for the chip of power consumption module when voltage recovery is higher and use, the chip of power consumption module can have longer time to accomplish basic work like this, then the battery does not have power voltage to detect chip LOW _ BAT and closes current output. Therefore, the problem that the chip in the power utilization module is quickly turned on and off when the battery voltage is close to zero is solved.
The utility model discloses do not injure the structure of power consumption module, the power consumption module of rear end as long as can use circuit voltage output end VBAT _ OUT's electric energy can. In some embodiments, as an example, the power utilization module may be as shown in fig. 5, and includes an MCU chip (such as chip model HS24G 3311) with wireless transmission and a temperature-sensitive resistor voltage-dividing circuit, when the battery recovers to a higher voltage, the circuit voltage output terminal VBAT _ OUT outputs electric energy to the MCU, the MCU may operate to obtain temperature through the temperature-sensitive resistor voltage-dividing circuit and then transmit the temperature through wireless transmission, then the battery is powered down to a lower voltage, the circuit voltage output terminal VBAT _ OUT cuts off the electric energy, and the MCU is directly turned off. Therefore, the MCU can work to send out data in a short time when the battery is powered down, and the problem that the existing circuit cannot work due to the fact that when the battery voltage is close to the power-on and power-off state of a chip in the power utilization module, the power utilization module is quickly started and shut down when the battery is simply controlled by the diode is solved.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent flow changes made by using the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.
Claims (8)
1. A low voltage detection circuit, includes battery power supply and direct current auxiliary power supply, battery power supply and direct current auxiliary power supply's negative pole ground connection, its characterized in that: the positive electrode of the battery power supply is connected with the source electrode of a first transistor and one end of a pull-up resistor, the drain electrode of the first transistor is connected with the voltage output end of a circuit, the grid electrode of the first transistor is connected with the other end of the pull-up resistor and the drain electrode of a second transistor, the source electrode of the second transistor is grounded, the grid electrode of the second transistor is connected with the output end of a voltage detection chip, the grounding end of the voltage detection chip is grounded, the input end of the voltage detection chip is connected with the positive electrode of the battery power supply, the positive electrode of the direct-current auxiliary power supply is connected with the positive electrode of a first diode, and the negative electrode of the first diode is connected with the voltage output end of the circuit.
2. A low voltage detection circuit according to claim 1, wherein: still include the second diode, the positive pole of battery power is connected with the source of first transistor and the one end of pull-up resistance and is included: the anode of the second diode is connected with the anode of the battery power supply, and the cathode of the second diode is connected with the source electrode of the first transistor and one end of the pull-up resistor.
3. A low voltage detection circuit according to claim 1, wherein: still wrap the third diode, the input of voltage detection chip with the anodal of battery power is connected and is included: and the anode of the third diode is connected with the anode of the battery power supply, and the cathode of the third diode is connected with the input end of the voltage detection chip.
4. A low voltage detection circuit according to claim 1, wherein: the transistor further comprises a fourth diode, wherein the anode of the fourth diode is connected with the source electrode of the first transistor, and the cathode of the fourth diode is connected with the drain electrode of the first transistor.
5. A low voltage detection circuit according to claim 1, wherein: the diode further comprises a fifth diode, the anode of the fifth diode is connected with the source electrode of the second transistor, and the cathode of the fifth diode is connected with the drain electrode of the second transistor.
6. A low voltage detection circuit according to claim 1, wherein: the grid electrode of the first transistor is connected with the drain electrode of the second transistor through the current limiting resistor.
7. A low voltage detection circuit according to claim 1, wherein: the first transistor or the second transistor is an MOS transistor.
8. A solar powered device having a low voltage detection circuit, characterized by: the solar battery power supply comprises a battery power supply, a direct current auxiliary power supply and a low voltage detection circuit, wherein the battery power supply and the direct current auxiliary power supply are connected with the low voltage detection circuit, the direct current auxiliary power supply is a solar panel, and the low voltage detection circuit is the low voltage detection circuit according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222613828.7U CN218242990U (en) | 2022-09-30 | 2022-09-30 | Low-voltage detection circuit and solar equipment with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222613828.7U CN218242990U (en) | 2022-09-30 | 2022-09-30 | Low-voltage detection circuit and solar equipment with same |
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| CN218242990U true CN218242990U (en) | 2023-01-06 |
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| CN202222613828.7U Active CN218242990U (en) | 2022-09-30 | 2022-09-30 | Low-voltage detection circuit and solar equipment with same |
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Address after: 350007 3rd and 4th Floor, No. 2 Factory Building, No. 71 Yangqi Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province, China Patentee after: Fujian Tiancheng Baode Intelligent Technology Co.,Ltd. Address before: 350007 3rd and 4th Floor, No. 2 Factory Building, No. 71 Yangqi Road, Gaishan Town, Cangshan District, Fuzhou City, Fujian Province, China Patentee before: FUJIAN TIANCHENG BAODE ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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