JPH038040Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a charging circuit that can charge multiple types of batteries, such as batteries with different voltages and batteries with different capacities, by simply adding a few parts to a conventional charger. .

As shown in Figure 1a, a conventional charger connects a commercial power source 3 to the primary coil 2 of a transformer 1, and provides charging terminals 7a and 8a to the secondary coil 4 via a resistor 5 and a diode 6. It was something like that. When charging a battery 9 as shown in FIG. 1b with such a charger, if terminals 7a and 7b, 8a and 8b are connected, the charging current will flow through the resistor 5, diode 6,
It flows into the battery 9 through the terminals 7a and 7b, and the terminal 8
A circuit is formed that returns through b and 8a.
Such a two-terminal charger 7a, 8a can charge only one type of battery. Therefore, in order to be able to charge two or more types of batteries, the number of charging terminals was increased or the structure of the charger was changed. However, changing the structure of the charger will complicate the circuits and mechanisms, and increasing the number of charging terminals will significantly increase the cost, and the battery pack will have to be divided into several types, which will place a burden on the mold. There were disadvantages such as the size of the device becoming larger and the overall shape also becoming larger. In addition, Figure 1c
shows an example in which a diode 10 is inserted in series with the battery 9 to prevent + and - from being connected in reverse.

The present invention has been made to solve the above-mentioned conventional problems, and includes a charger that supplies at least two types of charging voltages with opposite polarities to charging terminals via at least two types of charging lines; Said 2
By providing at least two types of switching elements that are inserted into one and the other of the different types of charging lines, and which turn off when one of them is on, the charging terminal of the charger can be used for both positive and negative charging terminals, and By imparting directionality to the charging line of the rechargeable battery, it is possible to charge two types of batteries with one pair of charging terminals.

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

First, the basic principle of the present invention will be explained with reference to FIGS. 2a, b, c, and d.

FIG. 2a has a pair of charging terminals 7a and 8a,
Charging line 11 coupled to one charging terminal 7a
A resistor 5 and a diode 6 are connected in series and coupled to one end of the secondary coil 4 of the transformer 1. In this case, by inserting a diode 10 in series as shown in FIG. Diode 6, terminal 7
a, 7b, diode 10, battery 9, terminal 8a,
It flows in the direction of 8b and is charged with a current determined by resistor 5.

Here, even if the battery 9 shown in FIG. 2b is incorrectly inserted into the charger shown in FIG. Therefore, the battery 9 will not be damaged, and if the battery 9 shown in FIG.
b, 7a, diode 6, and resistor 5, and is charged with a current determined by resistor 5.

Therefore, if the value of the resistor 5 is made different between Figure 2a and Figure 2c, charging will be performed with the charging current determined by each resistor 5, so two types of charger with the same structure can have different charging currents. The battery 9 can be charged.

Note that even if the battery shown in FIG. 2 d is inserted into the charger shown in FIG. 2 a, the battery shown in FIG. Battery 9 is protected.

FIG. 3a shows an embodiment embodying the principle of FIG. 2, which has a pair of charging terminals 7a and 8a, and a charging line 11 connected to one charging terminal 7a has a resistor. 12 and a diode 13 are connected in series, and a negative line 1 is a resistor 15 and a diode 16 connected in series.
7 and insert it in parallel with each other, transformer 1
The secondary coil 4 is connected to one end of the secondary coil 4. In this case, the resistors 12 and 15 are set to values that correspond to the type of battery to be charged. Further, the other charging terminal 8a is directly connected to the other end of the secondary coil 4 of the transformer 1 through a charging line 18. 3 is a commercial AC power source.

In such a configuration, a battery to be charged 9 with a diode 10 inserted in series as shown in FIG.
is coupled by its terminals 7b, 8b to the terminals 7a, 8a of the charger, the charging current flows through the resistor 1
2. The charge flows in the direction of the diode 13, the terminals 7a and 7b, the diode 10, the battery 9, and the terminals 8b and 8a, and charging is performed according to the standard. Furthermore, when a battery to be charged 9 with a diode 10 inserted in series as shown in FIG.
The charge flows in the direction of the terminals 8a and 8c, the battery 9, the diode 10, the terminals 7c and 7a, the diode 16, and the resistor 15, and is also charged according to the standard.

FIG. 4a shows another embodiment, in which a charger 19 for charging the battery 9a of FIG. 4b is shown.
and the charger 20 for charging the battery 9b in FIG. 4c are separate, and the charging terminals 7a and 8a are
This is the case when they are shared. That is, charging terminal 7
For a, 8a, chargers 19, 20 are connected in parallel with each other, and the respective positive direction lines 14 are connected to each other in parallel.
Switches 21 and 22 are provided at a and 14b, and the switches 21 and 22 are opened and closed alternately. In other words, both switches 21 and 22 are prevented from closing at the same time.
The switches 21 and 22 can be opened and closed by operating the flip-flop circuit 24 using the output from the oscillator 23 and using its Q output and output.

In such a configuration, if a battery 9a having a directionality as shown in FIG. 4b is connected, it will be charged when the switch 21 is closed, and a battery 9b having a directionality as shown in FIG. 4c is connected. Then,
The battery is charged when the switch 22 is closed.

Next, FIG. 5a further expands FIG. 4a and shows yet another embodiment having three charging terminals 7a, 8a, 25a and charging lines 11, 18, 32, and chargers 33b, 33c. ,33d,33
e, 33f, 33g are batteries 9b, 9c, respectively.
9d, 9e, 9f, and 9g are used for charging, and switches 34b and 9g are connected to the positive and negative lines respectively.
35b, 34c, 35c, 34d, 35d, 34
The switches 34b, 35b, 34c, and 35 are provided with pulses e, 35e, 34f, 35f, 34g, and 35g.
c, 34d, 35d, 34e, 35e, 34f,
35f, 34g, and 35g are closed. Its operation is similar to that shown in FIG.

Since the present invention is configured as described above, it is possible to charge different types of batteries, such as those with different battery voltages or batteries with different capacities, simply by changing the positive and negative connection directions to the charging terminals. Moreover, by adding only a few parts to a conventional charger, the overall shape remains the same, resulting in a simple structure and low cost.

[Brief explanation of the drawing]

Figure 1a is an electric circuit diagram of a conventional charger, Figures 1b and c are electric circuit diagrams of a battery to be charged, and Figure 2
Figures a, b, c, and d are electrical circuit diagrams showing the basic principle of the charging circuit according to the present invention; Figure 3 a is an electric circuit diagram showing a specific embodiment of the charging circuit according to the present invention; Figures 3 b, c are the electrical circuit diagrams of the batteries to be charged, respectively.
Figure a is an electrical circuit diagram of another embodiment of the present invention, No. 4
Figures b and c are electric circuit diagrams of the battery to be charged, Figure 5 a is an electric circuit diagram of still another embodiment of the present invention, and Figures b, c, d, e, f, and g are the electric circuit diagrams of the battery to be charged. It is an electrical circuit diagram. 7a, 8a, 25a...charging terminal, 9, 9a~
9g...Battery to be charged, 10...Diode, 1
1, 18, 32... Charging line, 12, 15...
Resistor, 13, 16... Diode, 14... Positive direction line, 17... Negative direction line, 19, 20,
33b to 33g...Charger, 21, 22...Switch.

Claims (1)

[Claims for Utility Model Registration] (1) In a charging circuit configured to supply a charging voltage from a charger to a battery to be charged via a charging terminal, the charger supplies the charging voltage from a charger to a battery to be charged via at least two types of charging lines. At least two types of charging voltages with opposite polarities are supplied to charging terminals, and at least two types of charging voltages are supplied to one and the other of the two types of charging lines, such that when one is on, the other is off.
What is claimed is: 1. A charging circuit comprising: one and the other of different types of switching elements inserted therein, and an element that provides directionality of current flow in the charged line of the charged battery. (2) The charger includes an AC power source, a positive direction line and a negative direction line inserted in parallel to one of two charging lines that connect the AC power source to a charging terminal, and a positive direction line and a negative direction line connected in parallel. and a resistor inserted in each of the lines, and the two types of switching elements are inserted in each of the positive direction line and the negative direction line, and are diodes having mutually opposite directionality. The charging circuit described in item 1. (3) The charger supplies two types of DC charging voltages with opposite polarities to the charging terminals via two types of charging lines, and the two types of switching elements are:
The charging circuit according to claim 1, which is a utility model registered, and serves as a switch that is inserted into each of the two types of charging lines and is controlled so that when one of the charging lines is on, the other is turned off.