JP2569473B2 - Control device for vehicle charging generator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for improving temperature characteristics of a charging voltage for controlling power generation of a vehicle charging generator by a battery temperature.

[Conventional technology]

In consideration of various requirements such as high reliability, simplification, and ease of assembly of the charging system, built-in type controllers with built-in regulators have become the mainstream for this type of control device (hereinafter referred to as a regulator). I have. Therefore, when the charging voltage has a temperature characteristic, the temperature of the generator or the regulator itself is measured and controlled as an index of the battery temperature change. In addition, when more accurate temperature control is performed without being affected by heat generation of the generator, the regulator is not integrated with the generator but is a separate type.

[Problems to be solved by the invention]

With the built-in regulators described above, the arrangement of various devices and parts in the engine room is different due to the recent diversification of vehicles, and the battery itself is affected by the load regardless of other devices. There is an increase in electrolyte temperature due to an imbalance in charge / discharge balance that causes overcharge, and an error occurs between the actual battery temperature and the temperature of the generator or regulator measured as an index value thereof. For this reason, even if the regulator has a temperature correction function, it may cause overcharging or insufficient charging of the battery. Although the above-mentioned problem is solved to some extent by the separate regulator, there is a problem that the charging voltage needs to be adjusted in consideration of the voltage drop due to the long interconnection between the generator and the regulator or the battery.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a regulator having a built-in temperature correction function for controlling a charging voltage according to a battery temperature, wherein a simple circuit is provided between a battery voltage sensing terminal of the existing regulator and the battery terminal. Vehicle charging and power generation that drives and controls the existing existing regulator by a signal that accurately responds to changes in battery temperature by simply adding a circuit, and that controls power generation at the optimal charging voltage for the measured battery temperature. It is an object of the present invention to provide a machine control device.

[Means for solving the problem]

According to the present invention, a battery to which an AC output induced in an armature coil of a charging generator is supplied and charged via a rectifier and a voltage signal having a value corresponding to the battery voltage are input from an input terminal, and A voltage regulator that can compare the signal with a preset regulated voltage that is corrected according to its own ambient temperature and adjust the output of the alternator based on the comparison result; and A temperature corresponding to the liquid temperature is detected, a battery temperature-corresponding voltage that changes following the temperature is compared with the battery voltage, and a voltage signal having a value corresponding to the battery voltage is generated based on the comparison result. An external control circuit for outputting to an input terminal, wherein an output of the external control circuit is such that the battery voltage is equal to the battery temperature regardless of an ambient temperature of the voltage regulator. If the voltage is higher than the regulated voltage, the voltage is set to a value higher than the regulated voltage of the voltage regulator and the power generation of the charging generator is stopped.If the battery voltage is lower than the battery temperature corresponding voltage, the value is set to a value lower than the regulated voltage of the voltage regulator. The vehicle is provided with a configuration of a control device for a vehicle charging generator, wherein the control device is configured to cause the charging generator to generate power.

〔Example〕

In FIG. 1, 1 is an armature coil 11, a field coil 1
2, a charging generator comprising a bridge rectifier 13, 2 a known regulator having a temperature compensation function, 3 an external control for operating the known regulator independently of its own temperature and in accordance with the battery temperature. A drive circuit 4 is a battery, 5 is a battery, 5 is an electric load of the vehicle, and 6 is a battery voltage sensing wiring of the regulator 2 when the drive circuit 3 is not provided. 2A to 2D are external terminals of the regulator 2, and 3A to 3C are terminals of the drive circuit 3.

The regulator 2 is, for example, a known circuit including a field current control transistor 21, a comparator 22, a temperature correction transistor 23, and a constant voltage source 24 as shown in FIG.
The temperature characteristic of the voltage (hereinafter referred to as "adjusted voltage") input to the non-inverting input terminal of the comparator 22 is obtained by operating the 23 in each of the cutoff, active and saturation regions according to the temperature as shown in FIG. It becomes a polygonal line (when there is no drive circuit 3). The constant region of the regulated voltage on the low temperature side is a state where the transistor 23 is shut off, the middle broken line region is a state where the regulator temperature rises and the transistor 23 starts to turn on, and the constant region of the regulated voltage on the high temperature side is saturated. Indicates a state in which

The driving circuit 3 includes resistors 31, 32, which constitute a voltage dividing circuit for obtaining a divided voltage _VA from a battery terminal voltage via a terminal 3B.
Known temperature sensor 3 attached to the battery electrolyte solution or the battery container outer wall to generate a voltage V _B which is proportional to the temperature
3, the voltage V comparator 34 as inputs _A and V _B, transistor 35 is driven and controlled by the output of the comparator 34 and the transistor 35 is turned on, the irrespective of the temperature of the regulator 2 to the off state regulator 2 DC-DC converter 36, voltage dividing resistors 37, 38 for obtaining a high or low level input voltage to generate or stop power generation
It is composed of The target charge voltage value is determined by
The output voltage of the temperature sensor 33 and the values of the voltage dividing resistors 31 and 32 are determined appropriately.

Voltage regulation when the temperature of the battery 4 is constant in the charge control device having the above configuration will be described. In this case, the voltage V _B is the transistor 35 and the voltage V _A is lower than V _B from becomes the voltage as an index value corresponding exactly to the battery temperature is turned on. Here, when the constant output voltage V ₀ of the DC-DC converter 36 is applied to the input terminal 2A (3A) of the regulator 2, the generator 1
(V _{0H in} Fig. 3) so that power generation is always stopped
It is. Therefore, when transistor 35 is on, the output voltage
V ₀ is divided by the resistors 37 and 38, and the divided voltage has a voltage value (V _{0L in} FIG. 3) that always causes the generator 1 to be in the power generation state regardless of the temperature of the regulator 2 itself. Therefore, the generator 1 starts power generation and charges the battery 4 with the rectified output. Voltage V _A is the voltage V input voltage level field current control transistor 21 for a voltage V _0H as described above for _B exceeds the transistor 35 to the regulator 2 off battery terminal voltage rises is turned on power The power generation of the machine 1 stops, and the battery terminal voltage starts to decrease. Battery voltage by repeating the operation on ordination will be constant control in relation to the voltage V _B as the index value of the battery temperature.

Next, voltage regulation when the temperature of the battery 4 changes will be described. In this case, since the output voltage V _B of the temperature sensor 33 also becomes a voltage corresponding exactly to the change in the temperature of the electrolyte of the battery 4, the transistor 35 is driven by the comparison output of the voltage V _B and the divided voltage V _A Controlled. Accordingly, the battery terminal voltage is to be controlled in relation only to the output voltage V _B of the temperature sensor 33 which corresponds exactly to the battery temperature change, conventional temperature regulator 2 having a temperature compensation function Will not be affected.

〔The invention's effect〕

As described above, the present invention relates to a regulator having a function of controlling an adjustment voltage in response to a change in liquid temperature of a battery, wherein a battery voltage and a battery temperature-corresponding voltage are provided between a battery voltage sensing terminal of the regulator and the battery. By adding a simple circuit in which the comparison output is used as the input of the regulator, it is possible to obtain a battery charging voltage that accurately follows a change in battery fluid temperature without modifying a conventional regulator. effective. Further, in the present invention, there is no need to change the mounting position of the existing regulator, and the charging wiring is not particularly long compared to the built-in regulator, and the voltage sensing wiring can be extremely short. Furthermore,
In the present invention, there is also an effect that it is not necessary to consider a wiring drop between the input of the conventional regulator and the additional circuit described above.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of a control device of the present invention, FIG. 2 is a circuit diagram of a known regulator in FIG. 1, and FIG. 3 is an input voltage of a regulator shown in FIG. It is a figure which shows the relationship between temperature and electric power generation. 1 ... Charging generator, 2 ... Conventional regulator, 3 ... Drive circuit, 33 ... Temperature sensor, 34 ... Comparator, 35 ... Transistor, 36 ... DC-DC converter, 4 ... Battery, 5 ...
… Electrical load, 6 …… Conventional wiring.

Claims (1)

(57) [Claims] An AC output induced in an armature coil of a charging generator is supplied through a rectifier to be charged, and a voltage signal having a value corresponding to the battery voltage is input from an input terminal. A voltage regulator that can compare a voltage signal with a preset regulated voltage that is corrected according to its own ambient temperature, and that can adjust the output of the AC generator based on the comparison result, A temperature corresponding to the electrolyte temperature is detected, a battery temperature-corresponding voltage that changes following the temperature is compared with the battery voltage, and a voltage signal having a value corresponding to the battery voltage is generated based on the comparison result. An external control circuit for outputting to the input terminal, wherein an output of the external control circuit is such that the battery voltage is equal to the battery voltage regardless of the ambient temperature of the voltage regulator. If the voltage is higher than the voltage corresponding to the temperature, the power generation of the charging generator is set to a value higher than the adjustment voltage of the voltage regulator and the power generation of the charging generator is stopped.If the battery voltage is lower than the voltage corresponding to the battery temperature, the value is lower than the adjustment voltage of the voltage regulator. A control device for a vehicle charging generator, wherein the control device is configured to generate power from the charging generator.