JP3941020B2 - Battery device for battery-assisted bicycle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery device for a battery-assisted bicycle that is equipped with a battery pack, supplies electric power to an electric motor, and travels by a combined force of a passenger's pedaling force and auxiliary power corresponding to the pedaling force.
[0002]
[Prior art]
Electric assist bicycles that supplement the pedaling force of the occupant with auxiliary power by the electric motor have been proposed and are already in practical use, but some have a battery pack detachably attached to the vehicle body as a power source for supplying electric power to the electric motor.
[0003]
This battery pack is configured by incorporating a battery in which a plurality of cells are electrically integrated in a battery case. The battery pack is detached from the vehicle body when charging, and a commercial power supply is connected to the charging connector to charge the battery. By mounting, the discharge connector is electrically connected to the vehicle body side plug, and power is supplied from the battery to the electric motor. Some battery packs include a control unit that controls charging and discharging based on a charging current and a discharging current, and displays a battery remaining amount for notification.
[0004]
[Problems to be solved by the invention]
By the way, since the current detection means for detecting the charging current and the discharging current is provided in the control unit, the power line becomes long depending on the arrangement place of the control unit. In addition, there is a problem that noise is generated because a large current flows when a power line is connected to the control unit, and a circuit pattern has heat.
[0005]
For this reason, in addition to the control unit, for example, when a dedicated mounting board for mounting the current detecting means is provided, the number of parts increases correspondingly, it is difficult to secure the arrangement space, and the support structure of the mounting board becomes complicated. .
[0006]
The present invention has been made in view of the above points, and can reduce the power line, make the circuit configuration compact, harvest from noise, and eliminate the need for a dedicated mounting portion for the current detection means. An object of the present invention is to provide a battery device for an auxiliary bicycle.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, the present invention is configured as follows.
[0008]
According to the first aspect of the present invention, “a human power drive system that transmits a pedal force input to a crankshaft to a resultant shaft and an auxiliary power system that transmits auxiliary power from an electric motor to the resultant shaft are provided together with the electric motor. A battery pack for supplying electric power is detachably attached to the vehicle body, and a control unit for controlling charge / discharge of the battery pack is provided. The battery pack incorporates a battery in which a plurality of cells are electrically integrated. A discharge connector that can be electrically connected to the vehicle body side plug when mounted on the vehicle body, and a charge connector that can be connected to the charger side when the battery is removed from the vehicle body. In the battery device of the battery-assisted bicycle having
The control unit is provided in the battery case and above the battery,
The battery terminal is provided at the bottom of the battery,
The discharge connector is disposed in the battery case at a position facing and close to the lower side of the battery,
Connecting the terminal of the discharge connector and the terminal of the battery via a power line;
A current detecting means for detecting a current from the power line, provided on the discharge connector,
A battery device for a battery-assisted bicycle, wherein current detection information from the current detection means is sent to the control unit via a signal line . ].
[0009]
According to the first aspect of the present invention, the control unit is provided in the battery case at the upper side of the battery, the battery terminal is provided at the lower part of the battery, and the discharge connector is provided in the battery case. Since the discharge connector is provided with current detection means that is disposed at a position facing and close to the lower side and that detects current from the power line connecting the battery and the discharge connector, the power line is long enough to connect the battery and the discharge connector. The power line can be shortened. Furthermore, since the current detection means is provided in the discharge connector, a dedicated mounting portion for the current detection means is not required. Also, by sending the current detection information from the current detection means to the control unit via the signal line, it is possible to prevent a large current from flowing through the control unit, resulting in noise and the circuit pattern being heated. The problem of holding it is solved and the circuit configuration can be made compact.
[0010]
According to a second aspect of the present invention, “the terminal of the charging connector is connected to the terminal of the discharge connector via a power line, and the battery is connected to the battery via a power line connecting the terminal of the discharge connector and the terminal of the battery. The battery device for a battery-assisted bicycle according to claim 1, wherein the battery device is configured to be rechargeable. ].
[0011]
According to the second aspect of the present invention, the charging current can be detected during charging by the current detecting means, the discharging current can be detected during discharging, and the detection of the charging current and the discharging current can be performed by the common current detecting means. As a result, the number of parts can be reduced and the circuit configuration can be simplified.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a battery device for a battery-assisted bicycle according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a battery-assisted bicycle, FIG. 2 is a view showing a state where a battery pack of a battery device is set, FIG. 3 is a view showing a state where a battery pack of the battery device is removed, and FIG. It is a figure which shows the structure of an apparatus.
[0015]
First, a schematic configuration of the battery-assisted bicycle 1 will be described with reference to FIG. The battery-assisted bicycle 1 has a body frame 2, and a handle stem 5 is rotatably inserted into a head pipe 4 positioned in front of the main pipe 3 constituting the body frame 2. A handle 6 is provided at the upper end of the handle stem 5, and a front fork 7 is provided at the lower end of the handle stem 5. A front wheel 8 is rotatably supported at the lower end of the front fork 7.
[0016]
From the head pipe 4, the main pipe 3 extends obliquely downward toward the rear of the vehicle body, and further bends downward and extends backward. From the rear end of the main pipe 3, a seat tube 9 is erected obliquely upward toward the rear of the vehicle body. The saddle 11 is supported on the upper end portion of the seat tube 9 via the seat post 10, and the height can be adjusted by operating the height adjusting handle 60.
[0017]
A power unit 20 is suspended via an engine bracket 19 at a substantially central lower portion of the vehicle body and at a connection portion between the main pipe 3 and the seat tube 9. The power unit 20 includes a human-powered driving system that uses the pedaling force of an occupant and an auxiliary power system that includes an electric motor 21. A crankshaft 12 is rotatably supported on the crankshaft 12. 13 is attached, and a pedal 14 is pivotally supported at the end of each crank 13.
[0018]
A pair of left and right chain stays 25 extend from the engine bracket 19 toward the rear of the vehicle body, and the rear end of the chain stay 25 extends obliquely downward from the upper end of the seat tube 9 toward the rear of the vehicle body. Connected to the lower ends of the pair of left and right seat stays 22. A rear wheel 23 is rotatably supported at a connecting portion between the chain stay 25 and the seat stay 22. The seat stay 22 is provided with a rear wheel locking device 24 for preventing theft, and the rear wheel locking device 24 locks the rotation of the rear wheel 23.
[0019]
Above the power unit 20, a battery pack 30 for supplying electric power to the electric motor 21 is detachably provided between the seat tube 9 and the rear wheel 23. The battery pack 30 is configured by incorporating a battery 32 in which a plurality of cells (single batteries) are electrically integrated in a battery case 31.
[0020]
The engine bracket 19 is provided with a battery receiver 34 with bolts 35, and the battery receiver 34 is provided with a battery lock device 43. The battery lock device 43 has a lock pin 51 that can be retracted and retracted. When the battery pack 30 is attached, the lock pin 51 is pushed and retracted. When the battery pack 30 is attached to the battery receiver 34, the lock pin 51 is The battery 32 is engaged and locked with the engagement recess 32d of the battery 32.
[0021]
A vehicle body side plug 63 is fixed to the bottom of the battery receiver 34. The battery pack 30 includes a discharge connector 70 capable of electrically connecting the battery 32 to the vehicle body side plug 63 in a state where the battery pack 30 is mounted, and a charge connector 71 capable of connecting the battery 32 to the charger side in a charged state removed from the vehicle body. And have.
[0022]
The battery pack 30 is detachable along the upper guide 42 and the lower guide 37. The upper guide 42 is fixed to the seat tube 9. The lower guide 37 has a lower portion 37 a fixed to the battery receiver 34, and an upper portion 37 b fixed to the rear fender 28 via a locking tool 40.
[0023]
A bracket 113 of the saddle 11 is rotatable with a support pin 114 as a fulcrum with respect to a bracket 112 fixed to the upper part of the seat post 10. A locking pin 115 is fixed to the bracket 112 of the seat post 10. The bracket 113 of the saddle 11 is provided with a lock lever 116 so as to be rotatable about a support pin 117 as a fulcrum. As shown in FIG. 2, the lock lever 116 is biased by a spring 118 so that the claw portion 116 a engages with the locking pin 115. By rotating the lock lever 116 by hand and removing the claw portion 116a from the locking pin 115, the saddle 11 can be tilted forward as shown in FIG. 3, and the battery pack 30 is attached to and detached from the vehicle body in this state. be able to.
[0024]
As shown in FIG. 4, the battery pack 30 includes a control unit 80 that controls charging and discharging of the battery pack above the battery 32, and a display unit 82 is connected to the control board 81 of the control unit 80. The display unit 82 is composed of, for example, an LED, displays the remaining battery level during charging or discharging, and the display unit 82 is provided so as to be exposed to the battery case 31 and visible from the outside. In addition, a temperature sensor 83 is connected to the control board 81, and this temperature sensor 83 is constituted by, for example, a thermistor. In the control unit 80, charging or discharging is performed based on temperature information of the battery 32 sent via the signal line 93. When control is performed, for example, when the temperature of the battery 32 is too high, discharging is stopped.
[0025]
Terminals 32 a and 32 b are provided on the lower side of the battery 32, and the discharge connector 70 is disposed at a position adjacent to the lower side of the battery 32. Terminals 70a and 70b of the discharge connector 70 and terminals 32a and 32b of the battery 32 are connected via power lines 84 and 85, and current detection means 86 for detecting a current from the power line 84 is provided in the discharge connector 70. . Heats 87 are provided on the power line 85. With the battery pack 30 attached, the terminals 70 a and 70 b of the discharge connector 70 are electrically connected to the terminals 63 a and 63 b of the vehicle body side plug 63.
[0026]
The terminals 71a and 71b of the charging connector 71 are connected to terminals of a charger (not shown) connected to a commercial power source during charging. The terminal 71a of the charging connector 71 is connected to the terminal 32b of the battery 32 via the power line 88, and the terminal 71b of the charging connector 71 is connected to the terminal 70a of the discharging connector 70 via the power line 89 so that the battery 32 can be charged. It is configured. The power line 89 is connected to a diode D that prevents reverse current flow during charging. The control board 81 and the charging connector 71 are connected by a driving power supply line 94, and the control board 81, the terminal 32 a of the battery 32 and the discharge connector 70 are connected by driving power supply lines 90 and 91.
[0027]
When charging, the drive power is supplied to the control unit 80 by the drive power supply line 94 and the drive power supply line 91, and during the discharge, the drive power is supplied to the control unit 80 by the drive power supply line 90 and the drive power supply line 91.
[0028]
Thus, since the current detection means 86 for detecting current from the power line 84 connecting the battery 32 and the discharge connector 70 is provided in the discharge connector 70, the power lines 84 and 85 connect the battery 32 and the discharge connector 70. The power lines 84 and 85 can be shortened. Furthermore, since the current detection means 86 is provided in the discharge connector 70, a dedicated mounting portion for the current detection means 86 is not required.
[0029]
Further, the charging current can be detected during charging by the current detecting means 86, the discharging current can be detected during discharging, and the number of parts can be reduced by detecting the charging current and the discharging current by the common current detecting means 86. And the circuit configuration is simplified.
[0030]
Further, the current detection information from the current detection means 86 is sent to the control board 81 of the control unit 80 via the signal line 92, so that a large current does not flow through the control unit 80, so that noise is generated or the circuit pattern is heated. The problem of holding it is solved and the circuit configuration can be made compact.
[0031]
【The invention's effect】
As apparent from the above description, in the invention according to claim 1, since the current detection means for detecting the current from the power line connecting the battery and the discharge connector is provided in the discharge connector, the power line is connected to the battery and the discharge connector. The power line can be shortened with a sufficient length to connect the two. Furthermore, since the current detection means is provided in the discharge connector, a dedicated mounting portion for the current detection means is not required. In addition, since it is possible to prevent a large current from flowing through the control unit, problems such as noise and circuit pattern heat are eliminated, and the circuit configuration can be made compact.
[0032]
In the invention of claim 2, it is possible to detect the charging current at the time of charging by the current detecting means, to detect the discharging current at the time of discharging, and to detect the charging current and the discharging current by the common current detecting means, The number of parts can be reduced and the circuit configuration is simplified.
[Brief description of the drawings]
FIG. 1 is a side view of a battery-assisted bicycle.
FIG. 2 is a diagram illustrating a state in which a battery pack of the battery device is set.
FIG. 3 is a diagram showing a state where a battery pack of the battery device is removed.
FIG. 4 is a diagram showing a configuration of a battery device of a battery-assisted bicycle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Motor-assisted bicycle 12 Crankshaft 21 Electric motor 30 Battery pack 31 Battery case 32 Battery 32a, 32b Battery 32 terminal 63 Car body side plug 70 Discharge connector 70a, 70b Discharge connector 70 terminal 71 Charging connector 80 Control unit 84, 85 Power line 86 Current detection means

Claims (2)

A battery pack for supplying electric power to the electric motor is provided on the vehicle body, which includes a human-powered drive system that transmits pedal force input to the crankshaft to the resultant shaft and an auxiliary power system that transmits auxiliary power from the electric motor to the resultant shaft. The battery pack includes a control unit that is detachably provided and controls charging / discharging of the battery pack. The battery pack includes a battery case in which a plurality of cells are electrically integrated, and is mounted on the vehicle body. In the battery device of the battery-assisted bicycle having a discharge connector capable of electrically connecting the battery to the vehicle body side plug in a state and a charge connector capable of connecting the battery to the charger side in a charged state removed from the vehicle body,
The control unit is provided in the battery case and above the battery,
The battery terminal is provided at the bottom of the battery,
The discharge connector is disposed in the battery case at a position facing and close to the lower side of the battery,
Connecting the terminal of the discharge connector and the terminal of the battery via a power line;
A current detecting means for detecting a current from the power line, provided on the discharge connector,
A battery device for a battery-assisted bicycle, wherein current detection information from the current detection means is sent to the control unit via a signal line . The terminal of the charging connector is connected to the terminal of the discharging connector via a power line,
The battery device of the battery-assisted bicycle according to claim 1, wherein the battery can be charged via a power line connecting the terminal of the discharge connector and the terminal of the battery.

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