JP3011757U - Electric bicycle charger - Google Patents

Abstract

(57) [Abstract] [Purpose] The sealed battery used for electric bicycles may deteriorate the battery due to overcharging unless a dedicated charger is used, but a controller for controlling the rotational force of the motor. By simply switching the switch to control the charging current of the battery, good charging can be performed using a commercially available ordinary charger. [Structure] An electric bicycle charger configured to control a charging current of a battery 1 by switching a power transistor 4 for controlling rotation of a motor 2 by switching switches 7 and 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to charging a battery of an electric bicycle in which a motor is attached to a bicycle and the electric power of the battery rotates the motor to assist running.

[0002]

[Prior art]

 Sealed batteries are often used for electric bicycles because they are easy to use, but this has the drawback that performance tends to deteriorate without proper charging, so a special battery charger is used. Needed to be charged.

[0003]

[Problems to be solved by the device]

 It is thought that the seal type battery is prone to deterioration due to the nature of the electrolyte, which causes a large increase in internal resistance.However, if it is used for about an hour like an electric bicycle, it will be charged at night until morning. In this case, overcharging is likely to occur and the performance is significantly degraded.

[0004]

[Means for Solving the Problems]

 Not only the seal type battery, but in general, the dedicated charger for the battery has the initial charging current value and the final charging voltage set to the values peculiar to the battery. As a controller that controls the charging current according to the characteristics of the battery, we will develop a system that doubles as a controller that controls the current of the motor. The configuration of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of an electric circuit of the present invention. 1 is a battery, 2 is a motor, 3 is a controller, 7 and 8 are interlocking changeover switches, and 11 is a commercially available charger. . Since the contacts b and d of the switches 7 and 8 are closed when the motor is running, the electric power of the battery 1 is controlled by the controller 3 to drive the motor 2. That is, since the motor control circuit 5 controls the current of the power transistor 4, the rotational force of the motor 2 is controlled in accordance with the running. Further, since the illumination lamp 9 and the switch 10 are connected in parallel with the motor 2, the brightness of the lamp 9 is also adjusted by the voltage of the motor 2, and the illumination suitable for traveling can be obtained. To charge the battery 1, the commercially available charger 11 is connected to the points P and Q, and the battery 1 is charged through the contact C of the switches 7 and 8 and the transistor 4. In this case, the current of the power transistor 4 via the contact a and the charging current control circuit 6 is the battery. The charger 11 does not have to be a dedicated charger for the battery 1 because it is controlled so as to match the charging characteristics of 1.

FIG. 2 shows an example of a circuit for explaining the operation of the charging current control circuit 6. The resistor 17 adjusts the initial charging current, and the resistor 12 acts as a potentiometer to turn on the Zener diode 13 and turn on the transistor 14 when the battery 1 is charged to the final charging voltage. The resistor 16 is a bias resistor for turning on the transistor 15, and when the transistor 14 is turned on by the Zener diode 13, the transistor 15 is turned off, the charging current of the power transistor 4 is cut off, and the charging of the battery 1 is stopped. Therefore, as long as the charger 11 has sufficient voltage and current capacity, overcharging is prevented even if the charger 11 has no charging control function.

[0007]

[Effect of device]

 As described above with reference to an example of the path shown in the figure, a special switch is provided only by providing the changeover switch 7.8 and the charging current control circuit 6 in a part of the controller 3 for controlling the rotation of the motor. Even if a charger is not used, highly accurate charging can be performed according to the performance of the battery 1, so its application effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram showing main components of the present invention.

FIG. 2 is a circuit diagram of a charging current control circuit 6.

[Explanation of symbols]

 1 Battery 2 Motor 3 Controller 4 Power Transistor 6 Charging Current Control Circuit 7, 8 Changeover Switch 11 Charger

Claims (2)

[Scope of utility model registration request] 1. An electric bicycle which uses a battery (1), a motor (2) and a controller (3) as an auxiliary power by providing the bicycle with the battery (1), the controller (3) performs current control of the motor (2) during running, When charging the battery (1), changeover switch (7),
An electric bicycle charger in which (8) is switched to the charging side to control the charging current and perform an appropriate charging operation. 2. A motor (2) or a series circuit of a motor (2) and a controller (3) is connected in parallel with a series circuit of a lamp (9) and a switch (10), and this is a fitting for a motor (2). The electric bicycle according to claim 1, wherein the electric bicycle is mounted integrally with the vehicle so that illumination can be obtained by the electric power of the battery (1) during traveling.