CN104882916A - Intelligent electric bicycle charger with reservation function - Google Patents

Abstract

The invention discloses a reservable intelligent electric bicycle charger, which comprises: a constant current charging circuit, a fully charged self-stop circuit, a power-on isolation circuit, a reservation circuit and an LED display; the constant current charging circuit regulates the voltage and current of a power supply , to keep the voltage and current constant; full self-stop circuit includes 51 single-chip microcomputer, analog-to-digital conversion chip ADC0808 and double D flip-flop 74LS74, full self-stop circuit monitors the battery status, displays the voltage value through the LED display, and cuts off the constant current when the battery is full The charging circuit prompts that the battery is full; the power-on isolation circuit uses a relay to jump off and delay charging for a period of time to protect the transformer and battery and prevent misoperation; the reservation circuit controls the opening and closing of the relay through the timing of the single-chip microcomputer to realize timing charging. After fully charged, the self-stop circuit cuts off the constant current charging circuit. Through the above method, the present invention can ensure the safe charging of the electric bicycle, and prevent the electric bicycle from being overcharged and not charged for a long time, resulting in power loss.

Description

Smart e-bike charger available by appointment

technical field

The invention relates to the field of chargers, in particular to a reservable intelligent electric bicycle charger.

Background technique

There is an existing smart charger for electric bicycle batteries, application number 201110450718, which includes a power supply module, a single-chip switching power supply connected to the power supply module for charging the electric bicycle battery, and a power output circuit module connected to the single-chip switching power supply , an optocoupler feedback circuit module connected to both the power output circuit module and the single-chip switching power supply, a voltage detection circuit module, a current detection circuit module, a signal conditioning circuit module connected to both the voltage detection circuit module and the current detection circuit module, A temperature sensor, a controller module connected to both the signal conditioning circuit module and the temperature sensor, and a clock module, a parameter setting and a display module connected to the controller module; the signal conditioning circuit module includes a filter circuit module, an amplifying circuit module and an A /D conversion circuit module; however, this kind of charger circuit is more complicated, and it cannot prevent the battery from running out of electricity for a long time. It cannot realize intelligent shutdown during the charging process of the electric bicycle, and there is an overshoot problem, which affects the battery life.

There is also a positive and negative pulse intelligent repair equalizer charger, application number 201220329420, including a power supply circuit, a single-chip microcomputer charging and discharging protection management module, a multi-core plug, and a battery pack. The battery pack consists of several batteries (4a, 4b, 4c, 4d, 4e , 4f) in series, a number of balanced discharge control circuits (7a, 7b, 7c, 7d, 7e, 7f) are connected in parallel between the charge and discharge protection management module of the single chip microcomputer and the battery pack, and the charge and discharge protection management module of the single chip microcomputer and the input terminal of the power supply circuit One end of the positive and negative pulse control circuit is connected to the charge and discharge protection management module of the single chip microcomputer, the other end is connected to the power supply circuit, and the detection circuit is connected to the charge and discharge protection management module of the single chip microcomputer. The purpose of the design is to prolong the service life of the battery. This kind of charger can avoid the problem of overcharging, but the battery protection circuit is complicated, and there are problems in reliability; it lacks digital display and reminder functions, and the human-computer interaction is poor; it cannot make an appointment for charging, and it cannot avoid the danger of power loss when the battery is not used for a long time.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a reservable intelligent electric bicycle charger, which can ensure the safe charging of electric bicycles and prevent the electric bicycles from being overcharged and not charged for a long time to cause power loss.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a reservable intelligent electric bicycle charger, including: constant current charging circuit, fully charged self-stop circuit, power-on isolation circuit, reservation circuit and LED display; The constant current charging circuit includes a triode IRF5305, a three-terminal adjustable shunt reference source TL431 and a dual operational amplifier LM358. The constant current charging circuit regulates the voltage and current of the power supply to keep the voltage and current constant; the full self-stop circuit includes 51 single-chip microcomputers , analog-to-digital conversion chip ADC0808 and double D flip-flop 74LS74, the self-stop circuit monitors the battery state when it is full, and displays the voltage value through an LED display. When the battery is full, it cuts off the constant current charging circuit and prompts that the battery is full; The relay jumps off and delays for a period of time before charging the battery, protecting the transformer and the battery, and preventing misoperation; the reservation circuit controls the opening and closing of the relay regularly through the single-chip microcomputer to realize regular charging, and the full self-stop circuit cuts off the constant charging after it is fully charged. flow charging circuit.

Preferably, the constant current charging circuit is provided with an input terminal VIN, and the power supply enters from the input terminal VIN, and the voltage is regulated by the triode IRF5305 to prevent the impact of excessive voltage on the rear circuit; the power supply passes through the three-terminal adjustable shunt reference source TL431 The voltage is divided into 2.5V for the dual operational amplifier LM358, and the dual operational amplifier LM358 regulates the output voltage and current, and the output voltage and current values remain constant.

Preferably, the 51 single-chip microcomputers, the analog-to-digital conversion chip ADC0808 and the double D flip-flop 74LS74 monitor the output tiny voltage; after the battery is full, the 51 single-chip microcomputers send data to the analog-to-digital conversion chip ADC0808, and the analog-to-digital conversion chip ADC0808 displays the data to On the LED display; the 51 single-chip microcomputer cuts off the constant current charging circuit through the control relay.

The beneficial effects of the invention are: the invention can ensure the safe charging of the electric bicycle, prevent the electric bicycle from being overcharged, prevent the electric bicycle from running out of charge for a long time, and prolong the service life of the battery.

Description of drawings

Fig. 1 is the schematic diagram of the constant current charging circuit of the intelligent electric bicycle charger that can be reserved in the present invention;

Fig. 2 is a schematic diagram of the full self-stop circuit of the reserved smart electric bicycle charger shown;

Fig. 3 is a schematic diagram of the power-on isolation circuit of the reserved smart electric bicycle charger shown;

FIG. 4 is a schematic diagram of a reservation circuit of the shown reservationable smart electric bicycle charger.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Please refer to Fig. 1 to Fig. 4, the embodiment of the present invention comprises:

A reservable smart electric bicycle charger, comprising: a constant current charging circuit, a fully charged self-stop circuit, a power-on isolation circuit, a reservation circuit and an LED display; the constant current charging circuit includes a triode IRF5305, a three-terminal adjustable shunt reference source TL431 and dual operational amplifier LM358, the constant current charging circuit has an input terminal VIN, the power enters from the input terminal VIN, and the voltage is regulated by the triode IRF5305 to prevent the impact of excessive voltage on the rear circuit; the power supply passes through the three-terminal adjustable shunt reference source TL431 divides the voltage into 2.5V for the dual operational amplifier LM358, and the dual operational amplifier LM358 regulates the output voltage and current, and keeps the output voltage and current values constant; the full self-stop circuit includes 51 single-chip microcomputers, analog-to-digital conversion chips ADC0808 and double D triggers 74LS74, the 51 single-chip microcomputer, the analog-to-digital conversion chip ADC0808 and the double D flip-flop 74LS74 monitor the output tiny voltage; after the battery is full, the 51 single-chip microcomputer sends data to the analog-to-digital conversion chip ADC0808, and the analog-to-digital conversion chip ADC0808 displays the data to all On the above-mentioned LED display; the 51 single-chip microcomputer cuts off the constant current charging circuit through the control relay and prompts that the battery is full; the power-on isolation circuit is protected by a single-chip microcomputer, and uses the relay to jump off and delay 500MS to charge the battery again, power-on isolation The circuit has three relays, the first protects the secondary side of the transformer to prevent excessive current, the second protects the output to the battery, and the third relay prevents misoperation; the reservation circuit controls the opening and closing of the relay through the timing of the single-chip microcomputer, Select the timing time according to the actual situation of the battery to realize timing charging. After the battery is fully charged, the full self-stop circuit cuts off the constant current charging circuit and stops charging.

The present invention has the following beneficial effects:

1. It is safer, avoids the problem of overshoot, and reduces the failure coefficient of the battery under long-term charging.

2. Intelligent, you can make an appointment to charge, solve the problem of power loss, more economical and environmentally friendly, in order to prevent the battery from shortening the life factor when it is not charged for a long time.

3. Long service life, with battery charging protection function, prolonging battery life and saving the cost of battery replacement;

4. Low cost, visualization, simpler and more reliable circuit, which can reduce production cost; digital display and prompt function increase the human-computer interaction function of the product.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (3)

1. A smart electric bicycle charger that can be reserved is characterized in that it includes: a constant current charging circuit, a full self-stop circuit, a power-on isolation circuit, a reservation circuit and an LED display; the constant current charging circuit includes a triode IRF5305, three terminal adjustable shunt reference source TL431 and double operational amplifier LM358, the constant current charging circuit regulates the voltage and current of the power supply to keep the voltage and current constant; 74LS74, full self-stop circuit to monitor the battery status, display the voltage value through the LED display, the battery is full, cut off the constant current charging circuit and prompt the battery is full; the power-on isolation circuit uses a relay to jump off and delay for a period of time before charging Charging protects the transformer and battery to prevent misoperation; the reservation circuit controls the opening and closing of the relay regularly through the single-chip microcomputer to realize regular charging, and the full self-stop circuit cuts off the constant current charging circuit after it is fully charged. 2. The reservable intelligent electric bicycle charger according to claim 1, characterized in that: the constant current charging circuit is provided with an input terminal VIN, the power supply enters from the input terminal VIN, and the voltage is regulated by the triode IRF5305 to prevent the voltage from being too high. Large impact on the rear circuit; the power supply is divided into 2.5V by the three-terminal adjustable shunt reference source TL431 to the dual operational amplifier LM358, and the dual operational amplifier LM358 regulates the output voltage and current, and the output voltage and current values are kept constant. 3. The reservable intelligent electric bicycle charger according to claim 1, characterized in that: the 51 single-chip microcomputer, the analog-to-digital conversion chip ADC0808 and the double D flip-flop 74LS74 monitor the output tiny voltage; after the battery is fully charged, the 51 single-chip microcomputer sends The data is sent to the analog-to-digital conversion chip ADC0808, and the analog-to-digital conversion chip ADC0808 displays the data on the LED display; the 51 single-chip microcomputer cuts off the constant current charging circuit through the control relay.