JP2002078225A - Charging controller for battery and outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight and small sized charging controller having a simple configuration that can prevent an excessive charging/discharging of a battery, and can keep the charging condition of the battery in a good condition. SOLUTION: This charging controller 30 comprises an AC generator 15 that is driven by a driving means 12 and outputs a generated current 14, a battery 19 that charges the generated current 14 fed from the generator 15 and outputs the charging current 17 to an electric device 18, a drive control means 23 that electronically controls the drive of the driving means 12, a switch 35 that is capable of being closed so as to ground the generated current 14, and an overcharging control circuit 36 that outputs a short-circuit signal P so as to cause the switch 35 to close the switch 35 when the battery 19 is overcharge. Detecting the total period of the outputs of the short-circuit signals P per unit times S and, when the total period of the outputs is less than a predetermined value, the generated current 14 is increased by a drive of the driving means 12 that is controlled by the drive-control means 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charge control device for preventing overcharging and overdischarging of a battery, and an outboard motor.

[0002]

2. Description of the Related Art An outboard motor mounted on a ship usually includes a propulsion device pivotally supported by the hull to enable the hull to be propelled, and an actuator for oscillating the propulsion device. Have. The propulsion device includes an internal combustion engine for driving a propeller, an AC generator driven by the internal combustion engine to output a generated current, and charging the generated current output from the generator while charging the generated current. A battery that outputs the electric power to an electric device including the actuator,
Drive control means for electronically controlling the drive of the internal combustion engine (JP-A-9-60540).

When the internal combustion engine is driven, a propeller interlocked with the internal combustion engine propells the hull. At the same time, the generator is driven and the generated current output from the generator is generated. The battery is charged. On the other hand, the charging current output from the battery is supplied to electric devices such as the actuator and the ignition device of the internal combustion engine to drive them.

[0004] In the above configuration, the propulsion device may include an overcharge prevention device for preventing the battery from being overcharged. This device can be normally closed to ground the generated current. A switch and an overcharge control circuit that outputs a short-circuit signal to the switch so as to close the switch when the battery is overcharged.

When the battery is overcharged, a short-circuit signal is automatically output from the overcharge control circuit to the switch. Then, the switch is closed, and the generated current from the generator is grounded in accordance with the closing period of the switch, and charging of the generated current to the battery is prevented by the amount of the ground, This battery is prevented from being overcharged.

[0006]

In the above-mentioned prior art, overcharging of the battery can be prevented, but overdischarging cannot be prevented, so that the state of charge of the battery cannot be maintained in a good state. There is a point.

Conventionally, as an overdischarge prevention device for preventing overdischarge of a battery, an electric load for outputting a discharge current from the battery and a drooping characteristic of a battery voltage of the battery at the time of discharging to the electric load are conventionally detected. Detecting means, when the value detected by the detecting means is equal to or more than a predetermined value, that is, when it is determined that the battery has a tendency to discharge, to increase the generated current of the generator,
Thus, there has been proposed one that prevents overdischarge of the battery.

However, in the overdischarge prevention device, it is necessary to separately provide means for detecting the electric load and the drooping characteristic.
There is a problem that the above device is heavy and large, and its configuration is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is directed to a battery charge control device for preventing overcharging and overdischarging of a battery and maintaining a good state of charge. It is an object of the present invention to provide a charge control device which is lightweight, compact, and simple in configuration.

[0010]

According to the present invention, there is provided a battery charge control device and an outboard motor for solving the above-mentioned problems.
It is as follows.

As shown in FIGS. 1 to 4, an AC generator 15 which is driven by a driving means 12 and outputs a generated current 14, and the generated current which is output from the generator 15. 14 while charging current 17
19 for outputting electric power to electric equipment 18, and drive control means 2 for electronically controlling the drive of drive means 12
3, a switch 35 that can be closed to ground the generated current 14, and an overcharge control circuit 36 that outputs a short-circuit signal P to the switch 35 to close the switch 35 when the battery 19 is overcharged. Charge control device for the battery 19 comprising:

A total output period of the short-circuit signal P per unit time S is detected, and when the total output period is less than a predetermined value, the drive unit 12 is driven by the drive control unit 23 to control the power generation. The current 14 is increased.

According to a second aspect of the present invention, as shown in FIGS. 1 to 4, in addition to the first aspect, the driving means 12 is an internal combustion engine 13 for driving the propeller 6 of the outboard motor 4. is there.

As shown in FIGS. 1 to 3 and 5, the invention according to claim 3 comprises a propulsion device 7 pivotally supported by the hull 3 to enable the hull 3 to be propelled, and the propulsion device 7. The propulsion device 7 includes an internal combustion engine 13 for driving the propeller 6, and an AC generator 15 that is driven by the internal combustion engine 13 and outputs a generated current 14.
And a battery 19 that charges the generated current 14 output from the generator 15 and outputs the charged current 17 to an electric device 18 including the actuator 9.
A drive control means 23 for electronically controlling the driving of the internal combustion engine 13, a switch 35 that can be closed to ground the generated current 14, and a switch 35 that is closed when the battery 19 is overcharged. Yoko switch 35
And an overcharge control circuit 36 that outputs a short-circuit signal P to the outboard motor.

When the battery voltage 29 of the battery 19 when the actuator 9 is driven is lower than a predetermined value, the internal combustion engine 13 is driven by the drive control means 23 to control the rotation speed of the internal combustion engine 13. Is further raised to increase the generated current 14.

According to a fourth aspect of the present invention, as shown in FIGS.
When the battery voltage 29 is lower than a predetermined value when the actuator 9 is driven in a state where is not driven,
Under the control of the drive control means 23, when the internal combustion engine 13 is driven thereafter, the rotational speed of the internal combustion engine 13 is further increased.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment)

FIGS. 1 to 4 show a first embodiment.

In FIG. 2, reference numeral 1 denotes a ship. The ship 1 includes a hull 3 floating on a water surface 2 and an outboard motor 4 supported by a rear portion of the hull 3 to enable the hull 3 to be propelled. Have.

The outboard motor 4 is located near the rear end of the hull 3 and extends vertically and has a propulsion device 7 having a propeller 6 at its lower end. A pivotal support 8 for pivotally supporting the middle part to the rear end of the hull 3 and moving the lower end of the propulsion device 7 rearward and upward to allow free swinging A and B; The above propulsion device 7
And a hydraulic actuator 9 for enabling the propulsion device 7 to be fixed to the hull 3 at a desired swing position (posture). The actuator 9 includes an electric hydraulic pump, and can be driven by electric power.

If the propulsion device 7 is swung within a narrow range of the trim angle by driving the actuator 9, the attitude of the propulsion device 7 corresponding to each speed of the ship 1 can be obtained (solid line and dashed line in FIG. 2). Between). On the other hand, if the propulsion device 7 is largely swung forward A, the attitude of the propulsion device 7 when landing the ship 1 can be obtained (two-dot chain line in FIG. 2).

In FIGS. 1 to 3, the propulsion unit 7 includes an internal combustion engine 13 serving as a driving unit 12 for driving the propeller 6.
An AC generator 15 which is connected to a crankshaft of the internal combustion engine 13 and is driven by the internal combustion engine 13 to output an AC generated current 14; and a plurality of the generated currents 14 output from the generator 15 While charging through a rectifier 16 composed of a diode, the charging current 17 is output to an electric device 18 including the actuator 9, first and second batteries 19 and 20. And a drive control means 23 for performing dynamic control.

The generator 15 is a flywheel magnet, and is provided on a fixed side of the internal combustion engine 13 so as to face a rotor 25 for rotating a magnet in conjunction with the internal combustion engine 13 so as to oppose the rotation locus of the rotor 25. Generated coil 26
And The two batteries 19, 20 are supported by the hull 3, and the first battery 19 of these batteries 19, 20 has a large capacity, which corresponds to the electric equipment 18 such as the actuator 9, the starting motor, and the ignition device. And the second battery 20 is used for an electric device 18 of an accessory such as lighting.

The actuator 9 is connected to the battery 19
, A manual switch 28 for turning on and off is provided.

The propulsion unit 7 of the outboard motor 4 maintains the value of each battery voltage 29 of the batteries 19 and 20 within a range from a predetermined upper limit value to a predetermined lower limit value to maintain a good charge state. And a charging control device 30 for causing the charging control device 30 to perform the charging. The charge control device 30 is connected to the batteries 19 and 20.
Overcharge prevention device 31 for preventing each battery voltage 29 from exceeding an upper limit predetermined value, that is, preventing overcharge.
To prevent the respective battery voltages 29 of the batteries 19 and 20 from going to be less than the lower limit predetermined value.
And an overdischarge prevention device 32 for preventing overdischarge.

The overcharge prevention device 31 is provided with the generator 1
Switches 35, 35 that can be closed (ON) so that each output end of the power generation coil 26 of the power generation coil 5 is connected to the ground 34 and a part of the power generation current 14 is grounded;
An overcharge control circuit 36 that outputs short-circuit signals P1 to P3 to the switches 35, 35 so as to automatically close the switches 35, 35 when the overcharge of the switches 9, 20 is provided.

Each switch 35 is connected to a thyristor (SC).
R). When the batteries 19 and 20 are overcharged, that is, based on a detection signal indicating that each battery voltage 29 has exceeded a predetermined upper limit, the overcharge control circuit 36 applies a pulse-like short circuit to the gate of each switch 35. Signal P
Is automatically output.

Each of the switches 35 is kept closed only during a period substantially matching the input period of the short-circuit signal P from the overcharge control circuit 36, and the generator 1 is turned on in accordance with the closed period.
5, the generated current 14 from the generating coil 26 is grounded,
Thus, charging of the batteries 19, 20 with the generated current 14 is prevented, and overcharging of the batteries 19, 20 is prevented.

The overdischarge prevention device 32 detects the total output period of each of the short-circuit signals P1 to S3 per unit time S when the short-circuit signal P is output from the overcharge control circuit 36. When the period is shorter than the predetermined value, the drive current 12 of the power generator 15 is increased by driving the drive means 12 (internal combustion engine 13) under the control of the drive control means 23 to which the detection signal is input. Therefore, the generators 15 and the batteries 19 and 2
The amount of charge of the generated current 14 to 0 is increased, and the overdischarge of the batteries 19 and 20 is prevented.

FIG. 4 shows a more specific flowchart of the overdischarge prevention device 32 in the drive control means 23, and the symbol S indicates each step of the program.

3 and 4, first, the number of short-circuit signals P output from the overcharge control circuit 36 is counted (S2). Next, the number of pulses Ns per unit time S (second) is calculated (S3). Next, in S4, it is determined whether or not the number of pulses Ns per unit time S is less than a predetermined number.

Here, assuming that the periods t of the short-circuit signals P have the same value, Ns × t matches the total output period of the short-circuit signals P per unit time S.

If it is determined in S4 that the pulse number Ns is less than the predetermined number of revolutions, that is, substantially, the output total period of the short-circuit signal P per unit time S (Ns × t) ) Is less than the predetermined value, it is determined that the batteries 19 and 20 have a tendency to discharge (S5).

Then, in S6, in the internal combustion engine 13, the throttle opening is opened further or the fuel injection amount by the fuel injection valve is further increased, and the rotation speed of the internal combustion engine 13 (the idle rotation speed is reduced). Including the same hereinafter) is increased (increased).

Accordingly, the number of revolutions of the rotor 25 of the generator 15 linked to the internal combustion engine 13 is increased (increased), and the generated current 14 is increased. The amount of charge of the generated current 14 to the battery 19 is increased, and the overdischarge of the batteries 19 and 20 is prevented.

On the other hand, if it is determined in step S4 that the pulse number Ns is equal to or greater than the predetermined rotational speed, that is, substantially, the total output period of the short-circuit signal P per unit time S (Ns × t) Is greater than or equal to the predetermined value, it is determined that the batteries 19 and 20 do not tend to discharge. Here, the rotational speed of the internal combustion engine 13 is set to the value of S6.
If it is determined that the engine speed is increasing based on the control (S7), the increase in the rotational speed of the internal combustion engine 13 is canceled (S8).

According to the charging control device 30 having the above configuration, the total output period of the short-circuit signal P per unit time S is detected, and when the total output period is less than a predetermined value, the control of the drive control means 23 is performed. , The generated current 14 is increased by driving the driving means 12 (internal combustion engine 13).

For this reason, according to the charge control device 30, not only the overcharge control circuit 36 prevents the batteries 19 and 20 from being overcharged, but also the overcharge control circuit 3
The power generation current 14 is increased by the total output period of the short-circuit signal P per unit time S output from the battery 6, so that the amount of charge of the power generation current 14 to the batteries 19 and 20 is increased. , 20 are also prevented.

Thus, the state of charge of the batteries 19 and 20 can be maintained in a good state.

In addition, since the above-described overdischarge is prevented by using the overcharge control circuit 36 for preventing overcharge, an electric load and a drooping characteristic detecting means are separately provided as in the prior art. No need to provide.

Therefore, the charge control device 30 is lightweight,
In addition to being compact, the configuration can be simplified.

As described above, the driving means 12
Denotes an internal combustion engine 13 for driving the propeller 6 of the outboard motor 4.

Here, the outboard motor 4 is particularly required to be lightweight and compact, and since the charge control device 30 is applied to the outboard motor 4 as described above, this outboard motor 4 4 is preferred.

(Second Embodiment)

FIGS. 1 to 3 and 5 show a second embodiment.

The above embodiment has many points in common with the first embodiment in the structure, operation and effects. Therefore, these common components are denoted by the same reference numerals in the drawings, and redundant description thereof will be omitted, and different points will be mainly described. In addition, the configuration of each part in each of these embodiments may be variously combined in view of the problems and effects of the present invention.

In FIGS. 1-3 and 5, when the battery voltage 29 of the batteries 19 and 20 when the actuator 9 is driven is lower than a predetermined lower limit, the overdischarge prevention device 32 controls the drive control. By driving the internal combustion engine 13 under the control of the means 23, the rotation speed of the internal combustion engine 13 is further increased to increase the generated current 14.

FIG. 5 shows a more specific flow chart of the overdischarge prevention device 32 in the drive control means 23, and the symbol S indicates each step of the program.

In FIG. 5, first, it is determined whether or not the actuator 9 has been driven to swing the propulsion device 7 within the range of the trim angle (S9). It is determined whether the battery voltage 29 of the battery 19 at the time of this driving is lower than a lower limit predetermined value (S10).

Here, the swinging of the propulsion unit 7 in the range of the trim angle is usually performed immediately before the propulsion of the boat 1, and prior to the propulsion of the boat 1. Preparing the charged state of the battery 19 in advance is useful for smoothly propelling the boat 1. In general, the battery has a tendency that the battery voltage 29 drops more as the state of charge tends to be discharged when a certain amount of the charging current 17 is consumed, and as the life of the battery becomes shorter.

In order to propel the boat 1 in the case where the actuator 9 is driven by the charging current 17 of the battery 19 as a power source, the actuator 9 is driven first, and during or after driving. It is determined whether or not the battery voltage 29 of the battery 19 is lower than the lower limit predetermined value. Hereinafter, S1, 5 to 8 are executed to prevent the batteries 19 and 20 from being over-discharged.

According to the charging control device 30 having the above-described configuration, the propulsion device 7 pivotally supported by the hull 3 to enable the hull 3 to be propelled, and the actuator 9 for driving the propulsion device 7 to oscillate. Wherein the propulsion device 7 includes an internal combustion engine 13 for driving the propeller 6, an AC generator 15 driven by the internal combustion engine 13 to output a generated current 14, and the generated current output from the generator 15. A battery 19 for outputting the charging current 17 to an electric device 18 including the actuator 9 while charging the battery 14; and a drive control unit 23 for electronically controlling the driving of the internal combustion engine 13
A switch 35 that can be closed to ground the generated current 14 and an overcharge control circuit 36 that outputs a short-circuit signal P to the switch 35 so that the switch 35 is closed when the battery 19 is overcharged. Equipped outboard motor,

When the battery voltage 29 of the battery 19 at the time of driving the actuator 9 is lower than a predetermined value, the internal combustion engine 13 is driven by the control of the drive control means 23 to control the rotation speed of the internal combustion engine 13. Is further raised to increase the generated current 14.

Therefore, according to the charge control device 30, the overcharge control circuit 36 not only prevents the batteries 19 and 20 from being overcharged but also prevents the actuator 9 from being overcharged.
Voltage 29 of the battery 19 when
As a result, the generated current 14 is increased by increasing the rotation speed of the internal combustion engine 13, and accordingly, the amount of charge of the generated current 14 to the batteries 19, 20 is increased. Overdischarge is also prevented.

Therefore, the state of charge of the batteries 19 and 20 can be maintained in a good state.

Further, the above-described overdischarge is prevented by using the actuator 9 for swinging the propulsion device 7 as an electric load, and by using the internal combustion engine 13 for driving the propeller 6 and the overcharging for preventing overcharging. Since the overcharge control circuit 36 is used, there is no need to separately provide a means for detecting an electric load or a drooping characteristic as in the related art.

Therefore, the charge control device 30 is lightweight,
In addition to being compact, the configuration can be simplified.

In the above case, when the actuator 9 is driven in a state where the internal combustion engine 13 is not driven, when the battery voltage 29 is lower than a predetermined value, the drive control means 23 controls the internal combustion engine 13 thereafter. When the engine 13 is driven, the rotational speed of the internal combustion engine 13 is further increased.

Therefore, even when the internal combustion engine 13 is not driven when the actuator 9 is driven, when the internal combustion engine 13 is driven thereafter, overdischarge of the batteries 19 and 20 is prevented. You.

[0061]

The effects of the present invention are as follows.

According to the first aspect of the present invention, an AC generator driven by a driving means to output a generated current, and the generated current output from the generator is charged, and the charged current is directed to an electric device. A battery to be output; a drive control means for electronically controlling the drive of the drive means; a switch that can be closed to ground the generated current; and a switch to close the switch when the battery is overcharged. An overcharge control circuit that outputs a short-circuit signal to the battery charge control device,

A total output period of the short-circuit signal per unit time is detected, and when the total output period is less than a predetermined value, the generated current is increased by driving the driving means under the control of the driving control means. It is like that.

Therefore, according to the charge control device, not only is the overcharge control circuit prevented from overcharging the battery, but also the total output period of the short-circuit signal output from the overcharge control circuit per unit time. As a result, the generated current is increased, so that the amount of charge of the generated current to the battery is increased, thereby preventing the battery from being over-discharged.

Therefore, the state of charge of the battery can be maintained in a good state.

Further, since the overdischarge is prevented by using the overcharge control circuit for preventing the overcharge, the means for detecting the electric load and the drooping characteristic are separately provided as in the prior art. No need.

Accordingly, the charge control device can be made lightweight and compact, and can be simplified in configuration.

According to a second aspect of the present invention, the driving means is an internal combustion engine for driving a propeller of an outboard motor.

Here, the outboard motor is particularly required to be lightweight and compact, and is preferably used for this outboard motor because the charging control device is applied to the outboard motor as described above. .

According to a third aspect of the present invention, there is provided a propulsion device pivotally supported by a hull to enable the hull to be propelled, and an actuator for oscillating the propulsion device. A driving internal combustion engine, an AC generator driven by the internal combustion engine to output a generated current, and charging the generated current output from the generator while charging the generated current to an electric device including the actuator. A battery output toward the internal combustion engine, drive control means for electronically controlling the driving of the internal combustion engine, a switch capable of closing the generated current, and closing the switch when the battery is overcharged. An outboard motor including an overcharge control circuit that outputs a short-circuit signal to the switch;

When the battery voltage of the battery when the actuator is driven is lower than a predetermined value, the internal combustion engine is driven by the control of the drive control means.
The generated current is increased by further increasing the rotational speed of the internal combustion engine.

Therefore, according to the charge control device, not only is the overcharge control circuit prevented from overcharging the battery, but also the rotation of the internal combustion engine is controlled by the battery voltage of the battery when the actuator is driven. By increasing the number, the generated current is increased, and accordingly, the amount of charge of the generated current to the battery is increased, thereby preventing overdischarge of the battery.

Therefore, the state of charge of the battery can be maintained in a good state.

In addition, the above-described overdischarge is prevented by using an actuator that swings the propulsion device as an electric load.
Further, since the internal combustion engine for driving the propeller and the above-described overcharge control circuit for preventing overcharging are used, it is necessary to separately provide an electric load and a drooping characteristic detecting unit as in the related art. Absent.

Therefore, the above-mentioned charge control device can be made lightweight and compact, and the configuration can be simplified.

According to a fourth aspect of the present invention, when the battery voltage is less than a predetermined value when the actuator is driven in a state where the internal combustion engine is not driven, the drive control means controls the subsequent internal combustion engine to control the internal combustion engine. When the engine is driven, the rotational speed of the internal combustion engine is further increased.

Therefore, even if the internal combustion engine is not driven when the actuator is driven,
When the internal combustion engine is driven, overdischarge of the battery is prevented.

[Brief description of the drawings]

FIG. 1 is an electrical wiring diagram according to first and second embodiments.

FIG. 2 is a side view of the outboard motor according to the first and second embodiments.

FIG. 3 is a diagram illustrating an output state of a short-circuit signal from an overcharge control circuit in the first and second embodiments.

FIG. 4 is a diagram showing a flowchart of a drive control unit in the first embodiment.

FIG. 5 is a diagram showing a flowchart of a drive control unit in the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ship 2 Water surface 3 Hull 4 Outboard motor 6 Propeller 7 Propulsion device 8 Pivot 9 Actuator 12 Drive means 13 Internal combustion engine 14 Generated current 15 Generator 17 Charge current 19 Battery 23 Drive control means 29 Battery voltage 30 Charge control device 31 Overcharge prevention device 32 Overdischarge prevention device 34 Ground 35 Switch 36 Overcharge control circuit P Short circuit signal S Unit time t Period

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F02D 45/00 395 H02P 9/00 B H02P 9/00 9/04 J 9/04 B63H 21/26 VF term (reference) 3G084 AA08 BA34 DA13 DA19 EB23 FA03 FA33 3G093 AA19 BA17 CA08 CB15 DA01 DB19 DB28 EA03 EB09 FA08 5G060 AA05 BA06 BA08 CA12 CA21 DA02 DB05 DB07 5H590 AA01 AB04 AB05 CA22 CD01 CE03 CE05 DD64 EB02 FA05 FB02 FA05

Claims (4)

[Claims] An AC generator driven by driving means to output a generated current; a battery charging the generated current output from the generator while outputting the charged current to an electric device; Drive control means for electronically controlling the drive of the drive means, a switch that can be closed to ground the generated current, and a short-circuit signal output to the switch to close the switch when the battery is overcharged A battery charge control device having an overcharge control circuit that detects the total output period of the short-circuit signal per unit time;
A battery charge control device configured to increase the generated current by driving the driving unit under the control of the driving control unit when the total output period is less than a predetermined value. 2. The battery charging control device according to claim 1, wherein said driving means is an internal combustion engine for driving a propeller of an outboard motor. 3. A propulsion device pivotally supported by a hull so as to be capable of propelling the hull, and an actuator for oscillating the propulsion device, wherein the propulsion device is an internal combustion engine for driving a propeller. An AC generator driven by the internal combustion engine to output a generated current, and a battery that charges the generated current output from the generator and outputs the charged current to an electric device including the actuator Drive control means for electronically controlling the driving of the internal combustion engine, a switch that can be closed to ground the generated current, and a short-circuit signal to the switch to close the switch when the battery is overcharged. An outboard motor including an overcharge control circuit that outputs a signal when the battery voltage of the battery is lower than a predetermined value when the actuator is driven. The driving of the internal combustion engine by the control of the serial drive control means, outboard motor to more increase the rotational speed of the internal combustion engine to increase the power generation current. 4. When the battery voltage is less than a predetermined value when the actuator is driven in a state where the internal combustion engine is not driven, the drive control means controls
4. The outboard motor according to claim 3, wherein when the internal combustion engine is driven thereafter, the rotation speed of the internal combustion engine is further increased.