JP2834845B2 - Charging device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device that uses a secondary battery as a power supply to drive a load by applying continuous pulses.

[Related Art] When a storage battery, which is a power supply of an apparatus, is charged from a charger (battery), conventionally, the amount of charge from the charger has been determined based on the voltage and the charging time of the storage battery. FIG. 4 shows that the charging voltage of the storage battery is changed to a certain voltage V by constant current charging.
Shows a voltage control method in which the charging is completed when. FIG. 5 shows a time control method for completing the charging by charging the storage battery for a predetermined time T by constant current charging. Alternatively, it is a charge control method using the above method together. That is, charging is performed irrespective of the amount of consumption of the storage battery as a rechargeable battery.

[Problems to be Solved by the Invention] In such a conventional method, there is a problem that the efficiency is low when the battery is charged by the storage battery, and the life of the storage battery is short.

That is, FIG. 6 shows the relationship between the charging time with respect to the temperature of the storage battery and the charging voltage of the storage battery. The charging voltage of the storage battery has a temperature characteristic. The charging voltage is high when the temperature is low, and the charging voltage is low when the temperature is high. Tend to be. In FIG. 6, t ₃ > t ₂ > t ₁ . Therefore, when charge control is performed with the charge cut-off voltage V, insufficient charge occurs when the temperature of the storage battery is low, and overcharge occurs when the temperature of the storage battery is high. Also, in the time control, when the current consumption of the load is not uniform, there is a problem that charging is insufficient or overcharging occurs.

As described above, in the conventional charging method, the voltage control method and the time control method have poor accuracy in determining the amount of charge, the charging efficiency of the storage battery as a secondary battery from a battery or the like is low, and the life of the storage battery is shortened. There was a problem.

The present invention has been provided in view of the above points,
When the load is driven by pulses, the purpose is to count the number of pulses, calculate the accurate current consumption, perform charging control according to the current consumption, perform efficient charging, and extend the life of the storage battery. A charging device is provided.

[Problems to be Solved by the Invention] The present invention includes a driving device that drives a load by applying a pulse, a storage battery as a power supply of the driving device, and a counting unit that counts the number of pulses; Determining means for determining the consumption of the storage battery based on the counted number of pulses, charging means controlled by the output of the determination means to charge the storage battery in accordance with the consumption of the storage battery, and It is provided with display means for displaying a state, and a power supply unit serving as a power supply for the charging means.

[Operation] Thus, the pulse applied to the load is counted by the counting means, an accurate current consumption is calculated based on the counted number, and the charging of the storage battery is controlled in accordance with the current consumption.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows an overall block diagram, which comprises a main body 1 and a charger 7 composed of a battery and serving as a power supply unit. Body 1
Is a driving device 1 for driving a load with a pulse, a storage battery 2 as a secondary battery serving as a power source of the driving device 1, and a driving device 1
When the load is driven by a pulse, the counting means 4 counts the number of pulses, the judging means 5 judges the consumption (current consumption) of the storage battery 2 according to the number of pulses, and the output of the judging means 5 And charging means 3 for controlling the charging of the storage battery 2 in accordance with the consumption of the storage battery 2. The amount of consumption determined by the determining means 5 is as follows.
The calculation includes the self-discharge of the storage battery 2 and the current of other circuit units (such as a microcomputer) in addition to the pulse applied to the load.

Now, the number of pulses driving the load is X ₁ , the consumed current of one pulse is α ₁ , the operating time is t ₁ , the consumed current per unit time of the storage battery 2 is β _1, and the consumed current per unit time of other circuits is γ ₁ . if consumption Y ₁ can be calculated by determining means 5 _{Y 1 = α 1 X 1 +} (β 1 + γ 1) t 1.

Naturally, when the load is not driven, X ₁ = 0, and Y ₁ = (β ₁ + γ ₁ ) t ₁ is calculated.

Once connected body 1 and the charger 7 for Y _1, charging the battery 2 to charge the order of 100 to 120% in accordance with the charging efficiency of the battery 2.

For example, if constant current charging I and charging efficiency are 120%,
The charging time T ₁ is T ₁ = (Y ₁ /I)×1.2, and the charging means 3 is controlled by a signal from the judging means 5 to charge the storage battery 2 by the charging means 3 for T ₁ hours. There Once separated from the charger 7 performs the consumption Y _1, the remaining _{Y 3 (= Y 1 -Y 2} ) determining means 5 calculates the minus charge amount Y ₂ halfway again, the main body 1 Is connected to the charger 7, the consumption amount Y ₄ Y ₄ = Y ₃ + (β ₁ + γ ₁ ) t ₂ is determined by the determination means 5 at time t ₂ until the main body 1 and the charger 7 are connected again. After the calculation, the storage battery 2 is charged by the charging means 3.

In addition, in the display means 6, the signal from the determination means 5 indicates the remaining charge of the storage battery 2, during charging (when the main body 1 is connected to the charger 7 and being charged), and prompts charging (when the charging capacity decreases. , For example, when it becomes 0 to 20%). In addition, in the display means 6, when a charge prompt is issued, the user is notified by a light emitting element, a buzzer, or the like.

Also, due to the accumulated error due to the calculation of the charge amount, the actual capacity may become 0% or less even though the calculated charge amount remains. The control means 5 controls the driving device 1 to be turned off by the judging means 5 so that the load cannot be driven. However, the above-mentioned error is caused by setting the charging efficiency to 100 to 120%.
Has a tendency to overcharge, and the charge amount is actually 0 at 0 to 20%.
% Is unlikely to occur.

The case where the present invention is applied to a low frequency treatment device will be described. FIG. 2 shows a circuit diagram. It comprises an arithmetic and control unit 10 composed of a microcomputer, transistors Tr ₁ and Tr ₂ , capacitors C ₁ and C ₂ , a pair of conductors 12 a and 12 b attached to the human body, and the like. The conductors 12a and 12b, the transistors Tr ₁ and T
The driving device 1 is composed of r ₂ , the arithmetic control unit 10, and the like. Also,
FIG. 3 shows a time chart of voltages at points A to D in FIG.

From the arithmetic control unit 10, as shown in FIG. 3 (a), is outputted successive pulses, this pulse, transistor Tr ₁ is turned on and off, cause the counter electromotive voltage of the coil L,
Continue to charge through the diode D ₁ as shown the capacitor C ₁ in FIG. 3 (b). In other words, the number of switching transistors Tr _1, the charging voltage V ₁ of the capacitor C ₁ is controlled. Moreover, even the volume VR, can control the charging voltage V _1. Then, by the control pulse from the arithmetic control unit 10 shown in FIG. 3 (c), by turning on control transistor Tr _2, Shirubeko 12a, the capacitor C as shown in FIG. 3 (d) are the 12b pulse amplitude V ₁₁ corresponding to the _first charging voltage is output. This operation is repeated, so that a continuous pulse (voltage V ₁₁ ) is applied to the conductors 12a and 12b, that is, the human body.
It is designed to stimulate the human body.

Therefore, by counting the number of output pulses of the arithmetic and control unit 10, the current consumption of the low frequency treatment device can be calculated. In the case of a low-frequency treatment device, the current consumption varies depending on the mode, strength, and speed, and it is difficult to directly measure the current. However, by counting the output pulses of the arithmetic control unit 10, the current consumption is reduced. It is possible to accurately and easily calculate and increase the charging efficiency of the storage battery.

[Effects of the Invention] As described above, the present invention includes a driving device that drives a load by applying a pulse, a storage battery as a power supply of the driving device, and a counting unit that counts the number of pulses, Determining means for determining the amount of consumption of the storage battery based on the number of pulses counted, charging control for controlling charging of the storage battery in accordance with the amount of consumption of the storage battery controlled by the output of the determination means, and charging of the storage battery based on the output of the determination means. Since it is provided with a display unit for displaying a state and a power supply unit serving as a power supply for the charging unit, a pulse applied to the load is counted by the counting unit, and an accurate current consumption is calculated based on the counted number. By controlling the charging of the storage battery in accordance with the current consumption, proper charging can be performed, and the life of the storage battery can be extended. This has the effect of enabling display.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram when applied to the low frequency treatment device of the above, FIG. 3 is a time chart of the same, and FIG. FIG. 5 is a diagram showing charging time control according to the first embodiment, and FIG. 6 is a diagram showing a relationship with temperature characteristics according to the first embodiment. 1 is a driving device, 2 is a storage battery, 3 is a charging means, 4 is a counting means, 5 is a judgment means, and 6 is a display means.

Claims (1)

(57) [Claims] A driving device for applying a pulse to drive a load; a storage battery serving as a power supply for the driving device; a counting means for counting the number of pulses; and a storage battery based on the number of pulses counted by the counting means. Judging means for judging the consumption, charging means controlled by the output of the judging means to control the charging of the storage battery according to the consumption of the storage battery, and display means for displaying the state of the storage battery at the output of the judging means, A charging device comprising: a power supply unit serving as a power supply for the charging unit.