CN111009946A - Lamp and battery over-discharge control circuit and method - Google Patents

Lamp and battery over-discharge control circuit and method Download PDF

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Publication number
CN111009946A
CN111009946A CN201911356590.0A CN201911356590A CN111009946A CN 111009946 A CN111009946 A CN 111009946A CN 201911356590 A CN201911356590 A CN 201911356590A CN 111009946 A CN111009946 A CN 111009946A
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China
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battery
voltage
current
over
module
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CN201911356590.0A
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黄植富
林铁英
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Guangdong Kennede Electronics Manufacturing Co Ltd
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Guangdong Kennede Electronics Manufacturing Co Ltd
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Priority to CN201911356590.0A priority Critical patent/CN111009946A/en
Publication of CN111009946A publication Critical patent/CN111009946A/en
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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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a lamp and a battery over-discharge control circuit and a method, which judge whether the battery voltage is reduced to an over-discharge state by detecting the battery voltage, and reduce the current of a load when the battery power consumption enters the over-discharge state so as to enable the voltage of the battery to rise; when the electric quantity of the battery is continuously consumed, the voltage is reduced to an over-discharge state again, and the current of the load is reduced again, so that the voltage of the battery is increased again; after repeated times, the load current is reduced in a step-by-step manner, the voltage of the battery is kept above an over-discharge state, when the load current is reduced to a preset current value, if the current is reduced again, the brightness emitted by the load is too dim and has no practical significance, and the power supply is turned off; the method can effectively protect the battery, prevent over-discharge and simultaneously avoid the situation that when the lamp is in a bright use state, the brightness is suddenly reduced greatly due to over-discharge of the battery, and the lamp is in an impractical state that the lamp cannot be illuminated due to too dim.

Description

Lamp and battery over-discharge control circuit and method
Technical Field
The invention relates to the field of illumination, in particular to a lamp and battery over-discharge control circuit and method.
Background
The more lamps and lanterns in life are equipped with rechargeable batteries, make the application range of the lamps and lanterns become wider, can use in the place without external power supply, the lamps and lanterns are supplied power by the battery while using, when the electric quantity of the battery is more sufficient, the battery keeps in the higher voltage range, the brightness of the lamps and lanterns is sufficient; however, when the electric quantity of the battery is about to be consumed, the voltage of the battery falls off in a cliff manner, namely, the voltage value of the battery falling off is large in a short time, the brightness of the lamp becomes dark suddenly and obviously, the use is affected, and a user can mistakenly think that the lamp is broken; the lamp load is greatly reduced along with the voltage of the battery, the working current is correspondingly reduced, so the discharge curve of the battery is gently reduced, but the brightness of the lamp is far lower than the rated state, and the dim light effect has no practicability; meanwhile, due to the characteristics of the battery, the lower the discharge voltage is, the easier the service life of the battery is to be reduced, so that a novel battery over-discharge processing circuit and method are needed to be designed, the service life of the battery is reduced due to over-discharge of the battery, the load current of the lamp is reasonably controlled, and the practicability of the brightness of the lamp in the whole service state is ensured.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a battery over-discharge control circuit which can prevent the battery from over-discharging to reduce the service life, reasonably control the load current of a lamp and ensure the practicability of the brightness of the lamp in the whole using state.
The invention also provides a lamp which can prevent the service life from being reduced due to over-discharge of the battery and keep the brightness in a practical state all the time.
The invention also provides a battery over-discharge control method, which can prevent the battery from over-discharging to reduce the service life, reasonably control the load current of the lamp and ensure the practicability of the brightness of the lamp in the whole using state.
According to a first aspect of the invention, a battery over-discharge control circuit comprises:
the battery module is used for providing power for the circuit;
the control module samples the battery voltage of the battery module and correspondingly adjusts the output current of the battery module.
The battery over-discharge control circuit provided by the embodiment of the invention at least has the following beneficial effects: the battery module provides electric energy for the circuit, the control module samples the battery voltage of the battery module according to the preset time interval, when the electric quantity of the battery module is consumed, the battery voltage is reduced and is reduced to the voltage value preset by the control module, the control module controls the output current of the battery and reduces the current of the load, when the current of the load is reduced, the battery voltage can rise, when the electric quantity of the battery is continuously consumed and the battery voltage is reduced to the voltage value preset by the control module, the control module controls the output current of the battery again and reduces the current of the load, so that the battery voltage rises; repeating for multiple times to reduce the load current in a step manner until the load current is reduced to a preset current value, and closing the current output by the battery; the circuit can protect the battery from over-discharge, and make the current of the load be above the practical value, thereby avoiding the meaningless low-current working state.
According to some embodiments of the present invention, the control module includes an MCU module, a resistor R3, a resistor R4, and a MOS transistor Q1, a VDD terminal of the MCU module is connected to the first terminal of the battery module, and a PWM terminal of the MCU module is connected to the first terminal of the resistor R3; the G end of the MOS transistor Q1 is respectively connected with the second end of the resistor R3 and the first end of the resistor R4; the S end of the MOS transistor Q1 and the second end of the resistor R4 are respectively grounded, and the D end of the MOS transistor Q1 is connected with a lamp load.
According to some embodiments of the present invention, the battery module further comprises a filtering module for filtering current ripples of the battery module; the tact switch is used for switching the current of the load; the indicating lamp group is used for displaying the electric quantity of the battery; the filtering module comprises a resistor R1 and a capacitor C1, and a first end of the resistor R1 and a first end of the capacitor C1 are connected with the VDD end of the MCU module; the second end of the resistor R1 is connected with the first end of the battery module, and the second end of the capacitor C1 is connected with the second end of the battery module; the SW end of the MCU module is connected with the first end of the tact switch, and the second end of the tact switch is grounded; the indicating lamp group is connected with the MCU module.
According to the embodiment of the second aspect of the invention, the lamp comprises a lamp control circuit and further comprises an LED lamp.
The lamp provided by the embodiment of the invention at least has the following beneficial effects: this LED lamps and lanterns can prevent that the battery from putting excessively, keeps longer life to when battery power is lower, through progressively reducing lamps and lanterns luminance, the protection battery prevents to put excessively, prevents simultaneously that lamps and lanterns from becoming very dark suddenly under brighter state, is in the dim illumination state that has no practicality, influences the use.
According to a third aspect embodiment of the invention, a battery over-discharge processing method comprises the following steps:
step 1: sampling a battery voltage at a preset time interval, comparing the battery voltage with an over-discharge point voltage preset in a control module, and reducing a load current by the control module according to a preset amount when the battery voltage is lower than the over-discharge point voltage;
step 2: comparing the load current with an over-discharge current preset in a control module, and when the load current is smaller than the over-discharge current, turning off a load power supply by the control module; and when the load current is larger than the over-discharge current, repeating the step 1.
The battery over-discharge processing method provided by the embodiment of the invention at least has the following beneficial effects: judging whether the battery voltage is reduced to an over-discharge state or not by detecting the battery voltage, and reducing the current of a load to enable the voltage of the battery to rise again when the electric quantity of the battery is consumed to enter the over-discharge state; when the electric quantity of the battery is continuously consumed, the voltage is reduced to an over-discharge state again, and the current of the load is reduced again, so that the voltage of the battery is increased again; after repeated times, the load current is reduced in a step-by-step manner, the voltage of the battery is kept above an over-discharge state, when the load current is reduced to a preset current value, if the current is reduced again, the brightness emitted by the load is too dim and has no practical significance, and the power supply is turned off; the method can effectively protect the battery, prevent over-discharge and simultaneously avoid the situation that when the lamp is in a bright use state, the brightness is suddenly reduced greatly due to over-discharge of the battery, and the lamp is in an impractical state that the lamp cannot be illuminated due to too dim.
According to some embodiments of the present invention, when the load power is turned on, a battery voltage is sampled, the battery voltage is compared with a necrosis voltage preset in a control module, and when the battery voltage is lower than the necrosis voltage, the control module turns off the load power. When the battery voltage is too low and is lower than the necrosis voltage, the battery is continuously used, so that the battery is over-discharged to generate physical damage and cause the battery to be necrotic, therefore, the battery can be protected, and when the battery is too low in electric quantity, the battery is in a protection state and does not work.
According to some embodiments of the present invention, when charging the battery, a battery voltage is sampled, the battery voltage is compared with a necrosis voltage preset in a control module, and the control module turns off the load power when the battery voltage is lower than the necrosis voltage. When charging the battery, judge the electric quantity of battery earlier, if when voltage is less than the necrotic voltage, only charge to lamps and lanterns, close the load power, when preventing charged state, the user mistake thinks can charge simultaneously and turn on the light, leads to battery physics to damage.
According to some embodiments of the present invention, when the battery is charged, the load current is compared with an over-discharge current preset in a control module, and when the load current is less than the over-discharge current, the control module turns off the load power supply. When the lamp is charged, if the charging current cannot meet the consumption current of the load, the electric quantity of the battery can still be continuously consumed and reduced, so that overdischarge is caused, the battery is damaged, and the battery can be protected.
According to some embodiments of the present invention, when charging a battery, determining whether the battery voltage is increasing, when the battery voltage is increasing, the control module increases the load current by a preset amount until the load current reaches a rated value; the control module decreases the load current by a preset amount when the battery voltage is not increasing. When the battery is charged, the voltage rise of the battery is detected, and the charging current can meet the current consumption and the charging requirement of the current load at the same time, so that the load current can be increased, the brightness of the lamp can be increased, the brightness can be gradually increased, and the charging of the battery and the using effect of the lamp can be considered.
According to some embodiments of the present invention, a battery voltage is sampled, the battery voltage is compared with an overdischarge point voltage preset in a control module, and the control module turns off the load power supply when the battery voltage is lower than the overdischarge point voltage. During charging, when the charging current can not take into account consumption of the load and the requirement of battery charging at the same time, the battery voltage can continue to drop, the load current is reduced at the moment, whether the battery voltage is greater than the over-discharge point voltage or not is further judged, if the battery voltage is lower than the over-discharge point voltage, the load current is closed no matter the battery voltage is increased or reduced, and the damage of the over-discharge of the battery is avoided.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
FIG. 2 is a flowchart of a charging method according to an embodiment of the present invention;
fig. 3 is a circuit diagram of an over-discharge control circuit according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as set, mounted, connected, fixed and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 3, a battery overdischarge control circuit according to an embodiment of the present invention includes a battery module 103 for supplying power to the circuit; the control module 101, the control module 101 samples the battery voltage of the battery module 103, and correspondingly adjusts the magnitude of the output current of the battery module 103. The control module 101 comprises an MCU module, a resistor R3, a resistor R4 and an MOS transistor Q1; specifically, the MCU module is a singlechip, and an over-discharge point voltage value is preset and used for comparing with the battery voltage; the VDD end of the MCU module is connected with the first end of the battery module 103, and the PWM end of the MCU module is connected with the first end of the resistor R3; the G end of the MOS transistor Q1 is respectively connected with the second end of the resistor R3 and the first end of the resistor R4; the S terminal of the MOS transistor Q1 and the second terminal of the resistor R4 are grounded, respectively, and the D terminal of the MOS transistor Q1 is connected to the lamp load. The device also comprises a filtering module 105, which is used for filtering the current ripple of the battery module 103; a tact switch 106 for switching the magnitude of the current of the load; an indicator light set 104 for displaying the battery power; the filtering module 105 comprises a resistor R1 and a capacitor C1, wherein the first end of the resistor R1 and the first end of the capacitor C1 are connected with the VDD end of the MCU module; the second end of the resistor R1 is connected with the first end of the battery module 103, and the second end of the capacitor C1 is connected with the second end of the battery module 103; the SW end of the MCU module is connected with the first end of the tact switch 106, and the second end of the tact switch 106 is grounded; the indicator light set 104 is connected with the MCU module. The battery module 103 provides electric energy for the circuit, the control module 101 samples the battery voltage of the battery module 103 at preset time intervals, when the electric quantity of the battery module 103 is consumed, the battery voltage is reduced and is reduced to a voltage value preset by the control module 101, specifically, the battery voltage is reduced to an over-discharge point voltage value preset in the MCU module, the control module 101 controls the output current of the battery and reduces the current of the load, i.e., the MCU module controls the current flowing into the load from the battery through the MOS transistor Q1, when the current of the load is reduced, the battery voltage rises, when the electric quantity of the battery is continuously consumed and the battery voltage is reduced to the voltage value preset by the control module 101, the control module 101 controls the output current of the battery again and reduces the current of the load, so that the battery voltage rises; repeating for multiple times to reduce the load current in a step manner until the load current is reduced to a preset current value, and closing the current output by the battery; the circuit can protect the battery from over-discharge, and make the current of the load be above the practical value, thereby avoiding the meaningless low-current working state.
Referring to fig. 3, a lamp according to the embodiment of the second aspect of the present invention includes a lamp control circuit, and further includes an LED lamp 102. A first end of the LED lamp 102 is connected with a second end of the resistor R2, and a second end of the LED lamp 102 is connected with a D end of the MOS transistor Q1; the first end of the resistor R2 is connected with the second end of the resistor R1, so that the LED lamp 102 can prevent the battery from over-discharging, keep a long service life, and protect the battery from over-discharging by gradually reducing the brightness of the lamp when the battery power is low, and simultaneously prevent the lamp from suddenly becoming dark in a bright state, being in a dim lighting state without practicability and influencing the use.
Referring to fig. 1, a battery overdischarge processing method according to an embodiment of a third aspect of the present invention includes the steps of:
step 1: sampling the battery voltage at preset time intervals, comparing the battery voltage with the over-discharge point voltage preset in the control module 101, and reducing the load current by the control module 101 according to a preset amount when the battery voltage is lower than the over-discharge point voltage;
step 2: comparing the load current with an over-discharge current preset in the control module 101, and when the load current is smaller than the over-discharge current, the control module 101 turns off a load power supply; and when the load current is larger than the over-discharge current, repeating the step 1. Judging whether the battery voltage is reduced to an over-discharge state or not by detecting the battery voltage, and reducing the current of a load to enable the voltage of the battery to rise again when the electric quantity of the battery is consumed to enter the over-discharge state; when the electric quantity of the battery is continuously consumed, the voltage is reduced to an over-discharge state again, and the current of the load is reduced again, so that the voltage of the battery is increased again; after repeated times, the load current is reduced in a step-by-step manner, the voltage of the battery is kept above an over-discharge state, when the load current is reduced to a preset current value, if the current is reduced again, the brightness emitted by the load is too dim and has no practical significance, and the power supply is turned off; the method can effectively protect the battery, prevent over-discharge and simultaneously avoid the situation that when the lamp is in a bright use state, the brightness is suddenly reduced greatly due to over-discharge of the battery, and the lamp is in an impractical state that the lamp cannot be illuminated due to too dim.
Referring to fig. 1, in another embodiment of the present invention, when the load power is turned on, the battery voltage is sampled, the battery voltage is compared with a necrosis voltage preset in the control module 101, and when the battery voltage is lower than the necrosis voltage, the control module 101 turns off the load power. When the battery voltage is too low and is lower than the necrosis voltage, the battery is continuously used, so that the battery is over-discharged to generate physical damage and cause the battery to be necrotic, therefore, the battery can be protected, and when the battery is too low in electric quantity, the battery is in a protection state and does not work.
Referring to fig. 2, in another embodiment of the present invention, when the battery is charged, the battery voltage is sampled, the battery voltage is compared with a necrosis voltage preset in the control module 101, and when the battery voltage is lower than the necrosis voltage, the control module 101 turns off the load power. When charging the battery, judge the electric quantity of battery earlier, if when voltage is less than the necrotic voltage, only charge to lamps and lanterns, close the load power, when preventing charged state, the user mistake thinks can charge simultaneously and turn on the light, leads to battery physics to damage.
Referring to fig. 2, in another embodiment of the present invention, when the battery is charged, the load current is compared with an over-discharge current preset in the control module 101, and when the load current is less than the over-discharge current, the control module 101 turns off the load power. When the lamp is charged, if the charging current cannot meet the consumption current of the load, the electric quantity of the battery can still be continuously consumed and reduced, so that overdischarge is caused, the battery is damaged, and the battery can be protected.
Referring to fig. 2, in another embodiment of the present invention, when charging the battery, it is determined whether the battery voltage is increasing, and when the battery voltage is increasing, the control module 101 increases the load current by a preset amount until the load current reaches a rated value; when the battery voltage is not increasing, the control module 101 decreases the load current by a preset amount. When the battery is charged, the voltage rise of the battery is detected, and the charging current can meet the current consumption and the charging requirement of the current load at the same time, so that the load current can be increased, the brightness of the lamp can be increased, the brightness can be gradually increased, and the charging of the battery and the using effect of the lamp can be considered.
Referring to fig. 2, in another embodiment of the present invention, a battery voltage is sampled, when the battery voltage is dropping, the control module 101 decreases a load current by a preset amount, continues to monitor the battery voltage, if the battery voltage continues to drop, the control module 101 continues to decrease the load current by the preset amount until the load current decreases to an over-discharge value, at which time the battery voltage is compared with an over-discharge point voltage preset in the control module 101, and when the battery voltage is lower than the over-discharge point voltage, the control module 101 turns off the load power supply. During charging, when the charging current can not take into account consumption of the load and the requirement of battery charging at the same time, the battery voltage can continue to drop, the load current is reduced at the moment, whether the battery voltage is greater than the over-discharge point voltage or not is further judged, if the battery voltage is lower than the over-discharge point voltage, the load current is closed no matter the battery voltage is increased or reduced, and the damage of the over-discharge of the battery is avoided.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A battery over-discharge control circuit is characterized by comprising:
a battery module (103) for supplying power to the circuit;
a control module (101), wherein the control module (101) samples the battery voltage of the battery module (103) and correspondingly adjusts the output current of the battery module (103).
2. The battery over-discharge control circuit according to claim 1, wherein the control module (101) comprises an MCU module, a resistor R3, a resistor R4 and a MOS transistor Q1, a VDD terminal of the MCU module is connected to the first terminal of the battery module (103), a PWM terminal of the MCU module is connected to the first terminal of the resistor R3; the G end of the MOS transistor Q1 is respectively connected with the second end of the resistor R3 and the first end of the resistor R4; the S end of the MOS transistor Q1 and the second end of the resistor R4 are respectively grounded, and the D end of the MOS transistor Q1 is connected with a lamp load.
3. The battery over-discharge control circuit according to claim 2, further comprising a filtering module (105) for filtering current ripples of the battery module (103); a tact switch (106) for switching the magnitude of the current of the load; an indicator light set (104) for displaying the battery power level; the filtering module (105) comprises a resistor R1 and a capacitor C1, and a first end of the resistor R1 and a first end of the capacitor C1 are connected with the VDD end of the MCU module; the second end of the resistor R1 is connected with the first end of the battery module (103), and the second end of the capacitor C1 is connected with the second end of the battery module (103); the SW end of the MCU module is connected with the first end of the tact switch (106), and the second end of the tact switch (106) is grounded; the indicator light group (104) is connected with the MCU module.
4. A lamp comprising a battery over-discharge control circuit as claimed in any one of claims 1 to 3, and further comprising an LED lamp (102).
5. A battery over-discharge processing method is characterized in that: the method comprises the following steps:
step 1: sampling the battery voltage at preset time intervals, comparing the battery voltage with an over-discharge point voltage preset in the control module (101), and reducing the load current by the control module (101) by a preset amount when the battery voltage is lower than the over-discharge point voltage;
step 2: comparing the load current with an over-discharge current preset in the control module (101), and when the load current is smaller than the over-discharge current, turning off a load power supply by the control module (101); and when the load current is larger than the over-discharge current, repeating the step 1.
6. The battery overdischarge processing method according to claim 5, wherein when the load power supply is turned on, the battery voltage is sampled, the battery voltage is compared with a preset necrosis voltage in the control module (101), and when the battery voltage is lower than the necrosis voltage, the control module (101) turns off the load power supply.
7. The battery overdischarge processing method according to claim 6, wherein when charging the battery, the battery voltage is sampled and compared with the necrosis voltage preset in the control module (101), and when the battery voltage is lower than the necrosis voltage, the control module (101) turns off the load power supply.
8. The battery overdischarge processing method according to claim 7, wherein when charging the battery, the load current is compared with the overdischarge current preset in the control module (101), and when the load current is smaller than the overdischarge current, the control module (101) turns off the load power supply.
9. The battery overdischarge processing method according to claim 8, wherein when charging a battery, it is determined whether the battery voltage is increasing, and when the battery voltage is increasing, the control module (101) increases the load current by a preset amount until the load current reaches a rated value; the control module (101) decreases the load current by a preset amount when the battery voltage is not increasing.
10. The battery overdischarge processing method according to claim 9, wherein the battery voltage is sampled, the battery voltage is compared with the overdischarge point voltage preset in the control module (101), and when the battery voltage is lower than the overdischarge point voltage, the control module (101) turns off the load power supply.
CN201911356590.0A 2019-12-25 2019-12-25 Lamp and battery over-discharge control circuit and method Pending CN111009946A (en)

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Application publication date: 20200414