JPS63209435A - Charger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a charging device for charging a DC power source such as a battery.

[Prior Art] Generally, a charger normally charges one battery, and when a plurality of batteries need to be charged, an operator must perform various charging operations each time. Charging operations include attaching the connection wire between the battery and charger, setting the charging time, setting the charging current value, and confirming the completion of charging.

There are operations such as removing connection wires.

[Problems to be Solved by the Invention] However, there are problems in that it is very complicated for the operator to perform these operations for each of the plurality of batteries, and the operation takes time.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a charger that can automatically charge a plurality of batteries even with a single charger.

[Means for Solving the Problems] In order to achieve such an object, the present invention provides a DC power supply, a connection means for selectively connecting the DC power supply and a plurality of batteries, and a connection means for selectively connecting the DC power supply and a plurality of batteries; The present invention is characterized by comprising a detection means for detecting the end of charging of the battery, and an instruction means for instructing the connection means which battery should be connected next in accordance with the detection output of the detection means.

[Function] In the present invention, when charging a plurality of batteries, each time the detection means detects the completion of battery charging, the instruction means instructs the connection means to select a battery to be charged.
The connecting means sequentially connects the batteries and direct current, and can automatically charge multiple batteries.

[Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of the configuration of an embodiment of the present invention.

In FIG. 1, 1 is a power supply section, and the power supply section 1 obtains direct current after rectifying alternating current from a commercial alternating current power source.

2 is a constant current circuit section, and the constant current circuit section 2 adjusts the direct current rectified by the power supply section 1 so that it becomes a constant current. 3 is a control circuit section, and 4 is a power supply line.

Reference numeral 5 indicates a control line for instructing on/off of the constant current circuit section 2, and reference numeral 6 indicates a charging voltage detection line. 7 to 1G are relay contacts for switching between the constant current circuit section 2 and each battery (19 to 21), and relay contacts 7 to 1O constitute a switching section 50.

Reference numerals 11 to 14 are control lines for instructing relays 7 to 10 to be turned on and off. 15 to 18 are connectors for connecting the battery and the charging device. 19 to 22 are batteries, and 23 is a start switch for instructing the start of operation of the charger.

In such a configuration, the present invention has a plurality of batteries 1.
9 to 22 are automatically charged sequentially.

Note that this embodiment shows an example in which four batteries are charged.

FIG. 2 shows an example of the configuration of the control circuit 3 in the embodiment of the present invention.

In FIG. 2, 3-1 is a central processing unit (CPU), and the CPU 3-1 controls each part of the charger.
is random access memory (RAM), and RAM3
-2 stores input/output information related to arithmetic processing of the CPU 3-1.

3-3 is a read-only memory (ROM);
3-3 stores in advance the control procedure shown in the third figure executed by the CPU 3-1. 3-4 is a comparator, and the comparator 3-4 determines whether or not the charging voltage of the charging line 6 is below a predetermined reference voltage, and sets the determination result (charging voltage information) to "°1" and °°0. ” as bit information of CPU
Send to 3-1.

3-5 is a comparator that determines whether or not the power supply voltage of the power supply line 4 is below a predetermined reference voltage, and calculates the determination result (power supply voltage information) by 1".

110'' bit information is transmitted to the CPU 3-1.

Also, each switch 7.8, 9. The on/off information of to and 23 is also sent to the CPU 3-1.

Note that the various devices described above are provided with interfaces (Ilo), and the CPU 3-1 selectively reads transmitted information from the various devices.

FIG. 3 shows an example of the control procedure of the CPU 3-1 in the embodiment of the present invention. Note that this control procedure shows a procedure for battery charge switching control according to the present invention.

In FIG. 3, when the device is powered on, [;P1
13-1 turns off switches 7 to 10 and clears RAM 3-2. Also, the internal counter N in CPU3-1 is set to 1.
Set. This internal counter N stores the switch numbers of switches 7 to 10 to be turned on.

Next, after waiting for the switch 23 to be pressed (on), the CPU 3-
1 turns on the first switch 7 and turns on the power supply section 1.1. Constant voltage circuit 2
operation is permitted, and charging in the first battery is started (steps 52 to S3).

Next, the CPU 3-1 determines whether or not charging of the battery 19 has been completed. When charging ends, the charging voltage becomes equal to or higher than the predetermined charging end voltage, so the above-mentioned charging voltage information (output of comparator 3-4) is read by CPt13-1 and charging ends based on the value of this charging voltage information. All you have to do is determine whether or not you have done so.

If the end of charging is not confirmed, the process returns to step s4 and CPIJ 3-1 continues monitoring charging.

First, the first battery] CPt13
-1 is confirmed, turns off the switch indicated by counter N (current value 1), and changes the off state of this switch to R shown in the fourth figure.
Store in the AM memory area (F-J). Next, 1 is added to the counter N (steps 55 to S6).

Then, it is determined whether charging of all batteries is completed (step S7). This determination can be made by storing the number of batteries to be charged (4 in this example) in the ROM 3-3, and determining whether the value of the counter N exceeds this number of batteries.

Further, as shown in FIG.
10 is turned off. If it is desired to make the number of batteries to be charged variable, the number of batteries to be charged may be manually entered into the RAM 3-2 using a numeric keypad (not shown) provided in this configuration.

If all the batteries have not been charged, the switch indicated by the counter N is turned on and the process returns to step S4 (step S8). After repeating the above steps and charging all the batteries, the CPU3-N will have a constant current circuit of 5.71
Source 1. Turn off the switch 23 (step S9)
, ends the IJ procedure.

By executing the above procedure by CPυ3-1, it is possible to charge a plurality of batteries.

Note that in this embodiment, the end of charging is confirmed by detecting the charging N voltage, but in the case of a charging method in which the charging time is set using a timer, the charging time end signal (:PLI) is used.
3-1 may pick up the receiver and confirm the completion of charging.

In addition, in this embodiment, the power supply voltage information is transmitted from the power supply section 1 to C.
Since the power supply voltage is input to the PII 3-1, when this power supply voltage exceeds a predetermined level width, it is determined that it is an abnormal situation and the power supply unit 1. It is also possible to stop the constant current circuit 2.

[Effects of the Invention] As explained above, according to the present invention, it is possible to automatically charge a plurality of batteries sequentially using one charging circuit, thereby achieving the effect that the operation time for the operator can be shortened. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing an example of the configuration of the control unit 3 in the embodiment of the present invention, and FIG. 3 is a block diagram showing an example of the configuration of the control unit 3 in the embodiment of the present invention. FIG. 4 is an explanatory diagram showing an example of the memory configuration of the RAM 3-2 in the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Power supply part, 2... Constant current circuit part, 3... Control circuit part, 4... Power supply line, 5... Control line which turns on and off a constant current circuit, 7-10-... Relay I concubine point, 11-14...φ relay 7-10 control line, ■5-18...connector, 19-22...battery, 23...start switch. $, #: Flowchart of 4 real powers Figure 3

Claims (1)

[Scope of Claims] A DC power supply, a connection means for selectively connecting the DC power supply and a plurality of batteries, a detection means for detecting the completion of charging of the connected battery, and a detection means for the detection means. A charging device comprising: instruction means for instructing the connection means which battery should be connected next in accordance with the output.