JPS60257728A - 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]

(B) Industrial Application Field The present invention relates to a charging device that performs optimal charging by detecting the end of charging of a battery to be charged based on either the elapse of a set time of a timer or a set temperature increase. . (Example) Prior Art The concept of a charging device that charges a battery to be charged with a charging current of a constant value and stops charging when a preset time has elapsed has existed in the past, for example, in Utility Model Application No. 58-78748.
Generally, a timer IC is used to regulate the conduction time of a transistor inserted in a charging circuit of a battery to be charged, as in the technique disclosed in the above publication. In the case of this circuit, it suffices if the battery to be charged always has a constant remaining capacity, but if you are trying to charge a battery with a different remaining capacity, the charging time is changed, so the timer setting time must be changed step by step. Therefore, in the circuit disclosed in the above publication, it is necessary to provide a timer setting time changeover switch that can be operated from outside the charger. However, if such a switch is operated incorrectly, there is a risk that a battery with remaining capacity will be overcharged. In order to compensate for the problems caused by such a timer, there is, for example, Japanese Publication No. 55-11320, which is equipped with a voltage detection circuit that detects the battery voltage during charging and terminates the charging body, in addition to the timer. . With this technique, if the timer setting time is longer than the time it takes to fully charge the battery, charging can be terminated by detecting the VC voltage. However, the voltage detection circuit charges 11
The timer is automatically reset and turned on when the temperature is

[So, immediately after the first charging operation is completed, the second VC charging operation is performed, and if the operation is performed, the timer's worth of cents will be manually charged] ~ Unless it is corrected, there will be a low point while undercharging occurs. (c) Purpose of the Invention The present invention has been made in view of the problems of the prior art VC as described above, and it is an object of the present invention to provide a charging device that prevents both full charging and undercharging of a battery. It is. 2) Structure of the Invention The charger that supplies charging current to the Samokushi', N,' battery for a certain period of time according to a timer precedent is equipped with a multi-pole connector, and the battery to be charged is equipped with positive and negative terminals and an open/close terminal. By inserting a heat-sensitive element between the control terminal 9' and the battery to be charged (r4iJ), it is possible to control the elapse of the set time of the timer AiJ or the interruption of the heat-sensitive element QJ. When the earlier state occurs, full charge of the battery is detected, charging of the battery is terminated, and the timer is reset at the same time as the set time of the timer elapses or the heat sensitive element is shut off. It is something to do. (E) Example The drawing is an implementation circuit diagram of the charging device of the present invention. (1) is a step-down transformer (2) connected to AC power supply
The secondary coil (3) induces the current flowing through the secondary coil tIK current fL, rectifies it, and outputs a constant DC current. 1st secondary coil +4), 1st bridge rectifier (5), smooth tip/
(6), the first transistor (7) and its base resistance f81,k'', the second transistor (9) and its base resistance +l[lVc.l]υ is the second coil (IIVc It is a constant voltage @ source section that completely induces the flowing current, rectifies it, and outputs a constant DC voltage (V c c ), and includes a second secondary coil O3, a second bridge rectifier (]j1 constant voltage output section , first and second electrolytic capacitors f
f51 fL6j, energization, indicator lamp u7), and protective resistor (18. A relay switch 1221 is connected between the constant current power supply unit [31]
I'm having a meeting. (“g3Ll-1:) is the first electrolytic capacitor fl-51VC of the constant voltage power supply unit Q, D.
The emitter side 21 is connected, and a resistor (2411251, backflow prevention diode (Σ
61 and the capacitor row are connected to X. and t
l'lJ? The optical points l, l! between the diode 120 and the capacitor Cnear) 81 has the dj power terminal (connection point 9 between 1j and relay switch ('2)) VC connection type.
The electrolytic capacitor connected to 1 (4 < Punoko 1 / Kuta resistor (, the two resistors connected to the pick-up and the Zener diode. (2) Vi the above resistor C31), The diode C connected in parallel with the resistor i3]) is an inverter circuit INV1 connected to the resistance law of the diode C through the resistor G connected in 11j columns. c38) i, t R-S flip-flop circuit FF, its reset terminal R is connected to the inverter INv1■, and its terminal Q is connected to the base of the transistor T R4f41 via the base resistor 3!1. . Then, the emitter side of AiI transistor T R4f4 [IJ is connected to the constant voltage power supply section (1υ output (V c c
) VC connection, and the collector side is connected to a protective resistor (via the light emitting diode L E D 2 (4Z
is connected to. (One input side of the output terminal (2IVC) is connected to the output terminal (4J) of the NOR circuit 1 (shown as N0Ri in the figure), and the output side of the NOR circuit 1 (4J is a timer TM (like Input terminal RTVc is connected. (Tsukuda is inverter circuit INV3 (IN
V7. ], and its input side is connected to the output terminal To of the timer circuit TMf44), and the output side is an OR circuit 2 (indicated by oR2 in the figure) LAF; r'r
:Intermediate 1. TE fmge is connected to the set terminal SVc of the 7-lip-flop circuit FFi. +4n is an OR circuit 1 (indicated by OR1 in the figure), which inputs the inverter circuit I N V 1 (351) and the output of the flip-flop circuit FFi, and its output is the
The other input of the OR circuit 1 (4J) is a light emitting diode LED1 that displays charging status at +4, and its anode side is connected to the output (VCC) VC of the constant voltage power supply circle, and its cathode side is connected to the transistor TR. '5f, I!l and its base resistance r5tH: the NOR circuit 1 (4
J and the timer circuit TMf44). C'+1)Vj: Output of the constant voltage power supply section 1υ (V c
A transistor TR2 is connected to the output side of the OR circuit 1 (4 outputs) through a base resistor 2, and its collector side is connected to the relay coil (5
3) VC is connected. 64) is a diode connected in parallel with the relay coil and 3) IC. Furthermore, the relay RYL55 is made with the relay coil ■ and the relay switch prisoner.
Configure. (50 is a plurality of charged batteries 57) connected in series 3
This is a battery bag having terminals Cue (59) and (60). This battery bag 66+Vi terminal sleeper and battery 1'571
A heat sensitive element THf6υ is connected between the positive and negative electrodes. Here, terminal □□□ is the positive pole, terminal f (J is the negative pole, terminal (59
) is a control terminal. 6 is the inverter circuit I N V 1 (3G+ as one input, and the other input is from the terminal). The output of this NOR circuit 26 is the output of the OR circuit 2+4.
6) is the other input. Next, the operation of the above implementation circuit will be explained. When the secondary coil (1) of the transformer (2) is connected to the full AC power supply VC while the battery back (5f) is not connected, the output of the inverter circuit INVD'161 becomes H (high level) and the flip-flop circuit FF (to ) is in the reset state, so the output HL (low level) of the output terminal Q and the output of the output terminal Q become H. At this time, the relay coil) is open, the light emitting diode I and ED2 (42) remain off, and the light emitting diode (lη is lit). TMf44) is set to a reset state, and its output terminal TO outputs V'iH.Of course, the photodiode LED1 is off (48).The battery CD in the battery bag (5G) is now completely discharged. Consider the case where the battery grasshopper Kasumi is connected to the charger, and the inverter circuit I NV i (the output of the gradient becomes L, but
Reset terminal R of flip-flop circuit I'''F08)
Since the inputs of the VN terminals S are both VcL, there is no change in the outputs of the output terminals Q and Q. However, since the output of OR circuit 1 (47) changes from H to L, transistor TR2 (511) becomes conductive and relay RY6''
J is closed and charging of the battery 6η is started via the output terminals f'l and (21)k. At this time, the terminal f201 is connected to the negative electrode of the battery can via the heat sensitive element TH (6υ), so the output dL of the NOR circuit 1 (43) changes from dL to I-I. Therefore, the transistor T R3+41 conducts and emits light. Diode LED1 (4 (to) lights up to indicate that the '11℃ battery ('57) is being charged.The function of the timer circuit TMf44 is that the input to the input terminal RT is I-I V
If c, the timer operation is started. In this case, the output terminal TO
The output TFI is maintained at ViH during operation, and when a set time elapses, Lrt changes. Therefore i(, (as mentioned (
When NO1% circuit 1 (output of 43) becomes fVC, timer circuit TM+44) starts. Timer circuit TM at this time
The H output of f44) is inverted by inverter NV, 4'c and becomes an L output, which is input to OR circuit 2 (・10.NOR circuit #2 ffJ is inverter circuit IN
V1 (there is a terminal output, and the inverter circuit INV2
(Since the output of 6 is 11, its output is set. Therefore, the output of OR circuit 2 + 46) is the timer circuit T'?
It maintains L until the set time of vI+i, t+ has passed, and the state of flip-flop FF (3Q still remains unchanged. When the charging progresses further and the set time of the timer circuit T Mf44) has elapsed, its output The output of terminal TO becomes L,
At the same time, the timer circuit T M +44)ri millicent, the output of the inverter circuit I N V3
becomes. Therefore, the flip-flop FF (38) is set, and the output of its output terminal Q becomes H1, and the output of its output terminal Q becomes L. At the same time, the transistor TR414 becomes conductive and the light emitting diode LED2 (4V) lights up to indicate the end of charging, and the OR circuit it, +
7) output becomes H and transistor TR205I)
becomes non-conductive, relay RYI55) opens again, and charging of the battery (57) ends. At this time, NOR circuit 1 (
The output of i3 is l! : becomes transistor T R3t
491 becomes non-conductive, I and EDl (4~ go out). On the other hand, if the battery 67 has a remaining capacity, the VC will be charged until the timer circuit TM (the set time of 441 elapses). TRIυ is cut off.At this time, one input of NOR circuit 1 (43) and inverter INV2 (6□
Both inputs of □□ become VcH. and inverter IN
The output of V 2 (63) is inverted to H-L, and the output of NOR circuit 2 (63 changes to L- and H, so the output of OR circuit 2 (4
Since the output of Q becomes L-41<, the output of flip-flop FF (3
8) is set. At the same time, the output of the NOR circuit 1 (4J) changes to H-LVc, so the input of the input terminal RT-5 of the timer circuit TMf becomes LVc, and the timer circuit TM (
, l(i) The beam is cent. Therefore, when charging is performed again, the i'c i'ts timer circuit TMf44) starts counting from 0. (f) Effects of the Invention As described above, the present invention provides that the charger π, which supplies charging current to the battery to be charged for a certain period of time under timer control, has a multi-pole connector (7) and the battery to be charged has a - A negative terminal and a control terminal are provided, and V between the control terminal and the battery to be charged.
C. When the set time of the timer elapses by inserting all of the heat-sensitive elements, or when the heat-sensitive element is cut off, whichever comes first, a full charge of the battery is detected, and charging of the battery is terminated. , the VC timer is reset at the same time as the set time of the timer elapses or the heat-sensitive element is cut off, so the timer starts charging regardless of whether the battery to be charged has remaining capacity or not. Since the starting VcO is maintained, optimum charging can always be performed continuously.

[Brief explanation of the drawing]

The drawing is a circuit diagram of an embodiment of the charging device of the present invention. 57)...Battery to be charged, F44)...Timer, 11
．． 12υ...Connector, Trowel...Positive terminal, (60
)...Negative terminal, (59)...Control terminal,
...Heat-sensitive element. Applicant Sanyo Electric Co., Ltd. Representative Patent Attorney Masao Sano

Claims (1)

[Claims] (1) A charger that supplies charging current to the battery to be charged for a certain period of time under timer control is provided with a multi-pole connector, and the battery to be charged VC is provided with positive and negative terminals and a control terminal, and the control terminal and the battery to be charged are provided with positive and negative terminals and a control terminal. By inserting a heat-sensitive element between the battery and the battery, full charge of the battery is detected when the set time of the timer elapses or the heat-sensitive element is cut off, whichever comes first. A charging device characterized in that the charging device is configured to terminate charging and reset the timer simultaneously with the elapse of a set time of the timer or when the heat-sensitive element is shut off. (2J Ail) A patent characterized in that the battery to be charged is turned over to the charging side by the timer when it is completely discharged, and by the heat-sensitive element when there is capacity remaining.