JPS59112586A - Battery-charging circuit device - Google Patents

Abstract

PURPOSE:To prevent any possibility of charging a primary battery pack by providing a charging element installed in a VTR with three output terminals corresponding to a positive, a negative and a leased charging electrode and providing a secondary and a primary battery pack, respectively, with three electrodes comprised of said three electrodes and two electrodes comprised of a positive and a negative electrode. CONSTITUTION:Primary batteries are discriminated from secondary batteries on the side of a charging element by using the leased charging electrode 1a of a secondary battery pack 1. When a charging initiating switch 10 is pushed, the output of a latching relay 9 is applied to a flip flop 6 causing it to be reset before a relay 8 is turned toward contact (a) and charging current is fed to the secondary battery pack 1. At this point, when a primary battery pack 2 having no leased charging electrodes is connected to contact (a), pushing of the charge- initiating circuit 10 actuates a current-zero detecting circuit 5 and resets the latching relay 9 and the flip flop 6 thereby releasing the device from the state of charging. As a result, the possibility of charging the primary battery pack 2 can be avoided.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a charging current flowing into a battery pack to determine whether a battery of a VTR using a removable upper battery pack is a secondary battery or a secondary battery. This relates to a battery charging circuit that detects whether or not the answer is the answer and determines whether or not the charger can assume a charging state. ○ [Prior art] In a VTR, the battery power terminal is connected to the power input terminal and the charging 111 power supply terminal. Because it also serves as a terminal for secondary batteries, 0
Connecting a primary battery to this terminal has the disadvantage that it cannot be connected due to the possibility of charging the primary battery and the risk of being exposed to heat.

[Purpose of the invention]

The object of the present invention is to connect the battery charger by passing it through the charging-only electrode of the charger in the charging chamber; The purpose of the present invention is to provide a battery charging circuit that determines whether the current flowing into the battery is zero or within the charging state, and whether the current is continuous or not.

[Summary of the invention, ㅅ]

In the present invention, the charger in the VTR detects that the charging current has become zero and cancels the charging state. It has a 6-electrode structure with an electrode for 1-1, and 1, opposing heavy oil, 4b for the secondary battery on the side, 3 electrodes for the pack, and a positive C8 for the secondary battery.
1', a temporary 2.lj pole configuration was used, and the problem was solved by determining whether it is a negative battery pack or a secondary battery pack, depending on whether a charging current can be passed through the charging-only electrode and the positive electrode to the battery pack.

[Embodiments of the invention]

FIG. 1 is a schematic diagram of the electrode section of the battery pack.

1t is a secondary battery bag, and 2 is a primary battery bank. In this figure, the secondary battery pack 1 has a positive electrode, a negative electrode, and
It has a 1a charging-only electrode.

This electrode is used on the charger side to determine whether the battery is negative or secondary. FIG. 2 is an internal circuit diagram of two types of 'lft ponds, and FIG. 3 is an embodiment of the discrimination circuit. Next, the operation will be explained. When charging start switch 10 is pressed, latch relay 9
The output of 7 is applied to the 70 knob B, causing it to be reset, and the relay 8 is moved to the a side, causing charging current to flow through the secondary battery bag 1.

When charging is completed and the temperature of the secondary cell 1d rises and the thermostat 1e opens, the charging current becomes zero, and the zero current detection circuit 5 hits the clip-flop 6 and changes the relay 8 to the b side. Also reset latch relay 9. Here, charge the battery, step 1. When the primary battery pack 2 is connected as a battery, since there is no charge-only electrode, the current zero detection circuit 5 operates even if the charge start switch 10 is pressed, and the latch relay 9 and clip-flop 6 are reset to charge. Release the condition.

Therefore, the danger of charging the secondary battery bag can be avoided, and it is now possible to determine whether the secondary battery is flat or not, without the user having to do so.

〔Effect of the invention〕

According to the present invention, the charger side can determine whether the battery pack connected to the charger is a rechargeable secondary 1' square battery or a primary battery that cannot be charged, without the user having to judge. This eliminates the risk of charging a flat battery, allowing the use of primary and secondary batteries with peace of mind.

[Brief explanation of the drawing]

All the figures show one embodiment of the present invention, and FIG. 1 is a schematic diagram of the electrode section of a punctured battery, FIG. 2 is an internal circuit diagram of a punctured battery, and FIG. FIG. 1... Secondary battery puncture, 1a... Charging only electrode, 1b... Positive electrode, 1c, Negative'F[4@, 1d... Secondary cell , 1e... thermostand, 2... - secondary battery pack 2a... - iodine battery, 5... current control transistor, 4... constant 'torque current circuit, 5 ...Zero current detection IIJ circuit, 6...Flip-flop, 7... Relay drive circuit, 8...Relay, 9 - Latch relay, 10... Charging start Switch, 1i, , , , , vTR. 12...Resistance. (b) Fig. 2 Fig. 3 Pus

Claims (1)

[Claims] 1. A battery charging circuit that has a charging current detection circuit and is configured to release the charging mode when it detects that the charging current has fallen below a certain value, and a battery charging circuit for each of the primary and secondary batteries. In the two types of assembled batteries that have the same shape and are made into a flat shape, the negative battery has two positive and negative terminals, and the secondary battery has two positive and negative terminals placed in positions corresponding to the positive and negative two terminals of the primary battery, and a positive or negative terminal. Connected via thermo stand, 6th
A battery power supply terminal characterized in that it is configured to be charged using the above-mentioned charging terminal and either the positive or negative terminal by a group of assembled batteries having a 6 m charging terminal arranged at the position of jif 0.