CN211530774U - Low-power lead-acid storage battery charging device - Google Patents
Low-power lead-acid storage battery charging device Download PDFInfo
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- CN211530774U CN211530774U CN202020111615.2U CN202020111615U CN211530774U CN 211530774 U CN211530774 U CN 211530774U CN 202020111615 U CN202020111615 U CN 202020111615U CN 211530774 U CN211530774 U CN 211530774U
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Abstract
The utility model discloses a miniwatt lead acid battery charging device relates to the battery charging field. The utility model discloses in: a pin 1 of the main control chip is grounded through a capacitor; pins 2-5 of the main control chip are connected with the power input module, and pins 6 of the main control chip are grounded; one end of the light-emitting diode L1 is connected with the power input module, and the other end of the light-emitting diode L1 is connected with a pin 7 of the main control chip; one end of the light emitting diode L2 is connected with the power input module; the other end of the light emitting diode L2 is connected to the pin 10 of the main control chip. The utility model discloses a main control chip controls the system, and main control chip carries out incessant detection to battery voltage, electric current, inside temperature etc. and when the charger was connected with the battery, detects battery voltage, gets into charged state when being less than standard voltage, and the charge indicator is bright, begins the work of charging, and automatically regulated charging power reduces the harm of overcharge to battery and charging device.
Description
Technical Field
The utility model belongs to the technical field of battery charging, especially, relate to a miniwatt lead acid battery charging device.
Background
Some chargers applied in the market have large charging current, so that a board is easy to heat, temperature protection is not provided, and when the charger heats, certain cooling measures are not provided, so that faults are easy to occur, even serious consequences such as spontaneous combustion occur; only one charging power is available, the charging time is long, the charging working efficiency is low, the storage battery is damaged, and the service life is shortened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a miniwatt lead acid battery charging device controls the system through main control chip M8p613, and main control chip carries out incessant detection to battery voltage, electric current, inside temperature etc. when the charger is connected with the battery, detects battery voltage, gets into the charged state when being less than standard voltage, and the charge indicator is bright, begins the work of charging, and automatically regulated charging power reduces the harm of overcharge to battery and charging device.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model relates to a low-power lead-acid storage battery charging device, which comprises a power input module, a master control chip, a power indicator light and a state display light, wherein the power input module supplies power for the master control chip, the power indicator light and the state display light;
the pin 1 of the main control chip is grounded through a capacitor; pins 2-5 of the main control chip are all connected with the power input module, wherein a divider resistor RS is connected between the pins 2 and 4 of the main control chip and the power input module; one end of the divider resistor RS is also connected with an emitting electrode of the triode Q1; the collector of the triode is connected with a diode VD;
the 6 pins of the main control chip are grounded;
the power supply indicator lamp is a light emitting diode L1; one end of the light emitting diode L1 is connected with the power input module, and the other end of the light emitting diode L1 is connected with a pin 7 of the main control chip; the 7 pins of the main control chip are also connected with the power input module through resistors R1, R2 and R3 which are connected in series;
the state display lamp is a light emitting diode L2; one end of the light emitting diode L2 is connected with the power input module; the other end of the light-emitting diode L2 is connected with the output end of the amplifier; the non-inverting input end of the amplifier is connected with a pin 10 of the main control chip;
the pin 11 of the main control chip is connected with the collector of a triode Q1 through a resistor RT; the 12 pins of the main control chip are connected between the resistor R1 and the resistor R2;
the pin 13 of the main control chip is connected between the resistor R2 and the resistor R3, a resistor R4 is connected between the pin 13 of the main control chip and the resistor R3, and the other end of the resistor R4 is connected with the pin 10 of the main control chip;
a pin 14 of the main control chip is connected with a grounding capacitor, and a pin 15 of the main control chip is grounded through a resistor RD; and the 16 pins of the main control chip are connected with the base electrode of the triode Q1.
Furthermore, pins 3 and 5 of the main control chip are connected between the resistor R8 and the power input module.
Further, a matching resistor R5 and a matching resistor R6 which are connected in series are connected between the light emitting diode L2 and the power input module; one end of the matching resistor R6 is grounded; the inverting input of the amplifier is connected between the matching resistor R5 and the matching resistor R6.
Further, the model of the main control chip is M8p 613; the triode is a PNP triode; the power supply input module is 12V direct current.
The utility model discloses following beneficial effect has:
the utility model discloses a main control chip M8p613 controls the system, and main control chip carries out incessant detection to battery voltage, electric current, inside temperature etc. and when the charger was connected with the battery, detect battery voltage, get into the charged state when being less than standard voltage, and the charge indicator is bright, begins the work of charging, and automatically regulated charging power reduces the harm of overcharging to battery and charging device.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of a charging device for a low-power lead-acid battery.
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. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Referring to fig. 1, the present invention relates to a charging device for a low-power lead-acid battery, which comprises a power input module, a main control chip, a power indicator, and a status display lamp, wherein the power input module is a 12V dc power; the power input module supplies power to the main control chip, the power indicator lamp and the state display lamp;
the pin 1 of the main control chip is grounded through a capacitor; pins 2-5 of the main control chip are all connected with the power input module, wherein a divider resistor RS is connected between the pins 2 and 4 of the main control chip and the power input module; one end of the divider resistor RS is also connected with an emitting electrode of the triode Q1; the collector of the triode Q1 is connected with a diode VD; the triode Q1 is a PNP triode;
the power supply indicator light is a light emitting diode L1; one end of the light-emitting diode L1 is connected with the power input module, and the other end of the light-emitting diode L1 is connected with the pin 7 of the main control chip; the 7 pins of the main control chip are also connected with the power input module through resistors R1, R2 and R3 which are connected in series;
the state display lamp is a light emitting diode L2; one end of the light emitting diode L2 is connected with the power input module; the other end of the light-emitting diode L2 is connected with the output end of the amplifier; the non-inverting input end of the amplifier is connected with a pin 10 of the main control chip; a matching resistor R5 and a matching resistor R6 which are connected in series are also connected between the light-emitting diode L2 and the power input module; one end of the matching resistor R6 is grounded; the inverting input end of the amplifier is connected between the matching resistor R5 and the matching resistor R6;
the pin 11 of the main control chip is connected with the collector of a triode Q1 through a resistor RT; the 12 pins of the main control chip are connected between the resistor R1 and the resistor R2;
the pin 13 of the main control chip is connected between the resistor R2 and the resistor R3, a resistor R4 is connected between the pin 13 of the main control chip and the resistor R3, and the other end of the resistor R4 is connected with the pin 10 of the main control chip;
a pin 14 of the main control chip is connected with a grounding capacitor, and a pin 15 of the main control chip is grounded through a resistor RD; the pin 16 of the main control chip is connected with the base of a transistor Q1.
The type of the main control chip is an M8p613 single chip microcomputer; the M8p613 single chip microcomputer comprises a CPU module, a PWM module and an ADC module; the CPU detects the voltage and the current by controlling the ADC to acquire data, and after rectification and inversion, the master control chip controls the silicon controlled rectifier and the indicator lamp to detect the voltage, control the silicon controlled rectifier to work and change the waveform by PWM to change the charging power.
The charging mode of the low-power lead-acid storage battery charging device comprises the following modes:
1. constant current charging: when the battery voltage is low, the charger operates in a low-current maintenance charging state to perform charging operation.
2. Constant voltage charging: and as the maintenance charging is continued, the voltage of the battery is gradually increased to the standard voltage, the charger is switched to a constant voltage charging mode, and the charger constantly outputs high power to rapidly charge the battery.
3. Pressure limiting float charging: when the battery is close to full charge, the charger automatically shifts to a voltage-limiting floating charge state, the charging current at the moment gradually decreases from the rapid charge state to 10-30 mA after the battery is fully charged, so as to supplement the electric quantity lost by self-discharge of the battery. When the detection voltage reaches the standard, namely the charging is finished, the charging indicator lamp (green lamp) is on, and the charging device works in a trickle voltage-limiting floating mode.
Wherein, if the abnormal conditions appear in the charging process, then the flashing appears in pilot lamp (red light), reminds. When the charging reaches a certain time, the charging current becomes small, and the damage of the overcharge to the storage battery and the charging device is reduced.
The first embodiment is as follows: the embodiment is a control method of a charging device of a low-power lead-acid storage battery, which comprises the following steps: i, starting up self-checking, and judging whether the state is normal or not; normally carrying out constant current charging and detecting faults 1; normally performing constant voltage charging, and detecting faults 2; IV, normally carrying out floating charging and detecting faults 3; and V, finishing normal charging.
After the power is on, the green light is on, the current PWM duty ratio is 10%, and the battery polarity is judged by the detection level; continuously detecting and judging whether the battery is connected or not when the voltage is less than 3.0V;
when the voltage is detected to be larger than 1.5V, the duty ratio of the PWM (pulse-width modulation) current is controlled to be 1%, otherwise, the voltage does not reach, trickle charging is carried out, and the voltage is detected after a certain time delay;
detecting the voltage, and when the voltage is more than 2.3V, opening PWM voltage control, and outputting current with a PWM duty ratio of 60% (controlling the maximum charging current);
after a certain time delay, the silicon controlled rectifier is closed, the voltage which is changed by the resistance value change generated by the thermistor, namely a temperature signal is detected, the temperature is overhigh, the fan is started, the current PWM duty ratio is reduced to 20%, and the current is recovered to 60% after 5 minutes; then, continuously detecting; this period lasted 10 hours; after three times of continuous detection, di is 0& dv is 0 OR dv <0, the red light is turned off, the green light is turned on, the voltage PWM output is controlled to be reduced to 0%, the P5 outputs PWM duty ratio of 60%,
temperature protection: the resistance value generated by acquiring temperature information through the thermistor changes, temperature signals are continuously transmitted, when the temperature is too high, the temperature exceeds the early warning temperature, the fan is started, the temperature is still continuously detected during the heat dissipation and cooling, and when the temperature is lower than the early warning temperature, the fan stops.
Protection and charging indication: the circuit is provided with a reverse polarity protection circuit, and when the battery is reversely connected, the charger limits the output current so as not to cause accidents. The charging indication is composed of peripheral elements, a red light is on during charging, a charging fault red light flickers, and a green light is on after charging is completed.
The circuit can modify circuit parameters to adjust charging current and voltage, and meets the requirements of batteries with different specification capacities on charging.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. The utility model provides a miniwatt lead acid battery charging device, includes power input module, main control chip, power indicator, status display lamp, its characterized in that: the power input module supplies power to the main control chip, the power indicator lamp and the state display lamp;
the pin 1 of the main control chip is grounded through a capacitor; pins 2-5 of the main control chip are all connected with the power input module, wherein a divider resistor RS is connected between the pins 2 and 4 of the main control chip and the power input module; one end of the divider resistor RS is also connected with an emitting electrode of the triode Q1; the collector of the triode Q1 is connected with a diode VD;
the 6 pins of the main control chip are grounded;
the power supply indicator lamp is a light emitting diode L1; one end of the light emitting diode L1 is connected with the power input module, and the other end of the light emitting diode L1 is connected with a pin 7 of the main control chip; the 7 pins of the main control chip are also connected with the power input module through resistors R1, R2 and R3 which are connected in series;
the state display lamp is a light emitting diode L2; one end of the light emitting diode L2 is connected with the power input module; the other end of the light-emitting diode L2 is connected with the output end of the amplifier; the non-inverting input end of the amplifier is connected with a pin 10 of the main control chip;
the pin 11 of the main control chip is connected with the collector of a triode Q1 through a resistor RT; the 12 pins of the main control chip are connected between the resistor R1 and the resistor R2;
the pin 13 of the main control chip is connected between the resistor R2 and the resistor R3, a resistor R4 is connected between the pin 13 of the main control chip and the resistor R3, and the other end of the resistor R4 is connected with the pin 10 of the main control chip;
a pin 14 of the main control chip is connected with a grounding capacitor, and a pin 15 of the main control chip is grounded through a resistor RD; and the 16 pins of the main control chip are connected with the base electrode of the triode Q1.
2. The small-power lead-acid storage battery charging device according to claim 1, wherein pins 3 and 5 of the main control chip are connected between the resistor R8 and the power input module.
3. The charging device for the small-power lead-acid storage battery of claim 1, characterized in that a matching resistor R5 and a matching resistor R6 which are connected in series are further connected between the light-emitting diode L2 and the power input module; one end of the matching resistor R6 is grounded; the inverting input of the amplifier is connected between the matching resistor R5 and the matching resistor R6.
4. The charging device for the small-power lead-acid storage battery according to claim 1, wherein the model of the main control chip is M8p 613; the triode is a PNP triode; the power supply input module is 12V direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020111615.2U CN211530774U (en) | 2020-01-16 | 2020-01-16 | Low-power lead-acid storage battery charging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020111615.2U CN211530774U (en) | 2020-01-16 | 2020-01-16 | Low-power lead-acid storage battery charging device |
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| CN211530774U true CN211530774U (en) | 2020-09-18 |
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| CN202020111615.2U Active CN211530774U (en) | 2020-01-16 | 2020-01-16 | Low-power lead-acid storage battery charging device |
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