JPS5829336A - Dc power source - 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 The present invention provides a DC power source that receives commercial power, rectifies it with a rectifier, supplies it to a load, and uses the output of the rectifier to float charge an assembled battery as a preliminary energy source. The device detects the storage batteries with inferior characteristic data among the individual storage batteries constituting the assembled battery, and charges the storage batteries with the inferior characteristic data individually.
This invention relates to means for recovering characteristic data without performing equal charging.

In general, communication power supply equipment obtains the necessary DC power by rectifying the commercial power supply and supplies it to the load when the commercial power supply is normal. To ensure continuous operation, a storage battery is provided as a backup power source.

Figure 1 is a block diagram showing the system configuration of a general power supply device. In the figure, 1 is a commercial power source, 2 is a rectifier that converts AC to DC, and 3 is a'# storage battery connected in series. The connected battery pack 4 is a load.

In operation of this system, when the commercial power supply is normal, AC power from the commercial power supply 1 is converted into DC voltage necessary for the load by the rectifier 2, and power is supplied to the load 4. - At this time, the rectifier 2 also supplies a maintenance charging current to the assembled battery 3 to compensate for self-discharge, and generally 2.
The batteries are charged all at once at a constant voltage of 15V to 2.18V, appropriate for the number of batteries. Further, the number of storage batteries is appropriately selected to match the load voltage, and the storage battery capacity is determined from the required load current and the holding time in the event of a power outage. Therefore, at the time of one power outage, the storage battery supplies the necessary power to the load.

However, in actual assembled batteries, due to differences in characteristics such as self-discharge of individual storage batteries, even when maintenance charging is performed, the individual battery capacity varies widely, resulting in an imbalance in the charging state and the energy required in the event of a power outage. Because of this, the charging voltage is increased to approximately 2.26V to 2.40V per battery in half a year to one year, and the charging current is increased. We are implementing increasingly equalized charging. By performing this equal charging cycle, it is possible to recover the battery whose capacity has decreased, and it is possible to make the characteristics of the storage batteries constituting the assembled battery uniform to some extent. However, although this method restores a battery whose capacity has decreased, it has the disadvantage that a normal battery is severely overcharged, resulting in further deterioration of the battery and shortening the life of the entire assembled battery.

In order to eliminate these drawbacks, the present invention removes only the batteries with poor characteristics from the assembled battery and automatically charges them individually, thereby abolishing the equal charging that was conventionally performed. , the drawings will be explained in detail below.

FIG. 2 is a block diagram showing one embodiment of the present invention, and the same symbols in the figure as in FIG. 1 indicate the same things. Each of the individual storage batteries of the assembled battery 3 is 31.
32...3n (where n is an integer '#), 5 is a data recording device, and 51, 52°...5n are terminals leading to data recording sensors (not shown), respectively. , and 6 is the controller, 61°62,...
・6n is the switch drive signal, 71°72,...
...7n is an electromagnetic switch, and 8 is an auxiliary charger. The wiring connections in this embodiment are for the individual batteries 31, 32 .・
...3n, the sensor terminals 51, 52, .・・・・・・
5n is connected, and the data recording device 5 and controller 6 are connected by a signal line, and drive signals 61, 62 .・6n has individual batteries 31, 32.・
Electromagnetic switch 71.72. ·river··
7n, and the input of each electromagnetic switch is connected to the common auxiliary charger 8. To operate this, each storage battery 31, 32, .
...3n to terminals 51, 52.・The data recording device 5 simultaneously records the terminal voltage of each storage battery periodically from the data recording sensor (not shown) connected via the data recording device 5n. The terminal voltage of the storage battery is sent to the controller 6 via the signal In. In 0-RA 6, the terminal voltages of the individual storage batteries sent are compared with predetermined set voltages. The set voltage is generally about 2.10V for a battery with a floating voltage of 2.15V per cell, and about 2.14V for a battery with a floating voltage of 2.18V per cell. As a result of the comparison, if there is a storage battery with a voltage lower than the set voltage, the controller 6 will charge the corresponding storage battery individually.
A switch drive signal is sent out. If you keep it, storage battery 3
If the terminal voltage of 1 is less than the set voltage, the drive signal 61 of the 1 controller 6 turns on the electromagnetic switch 71, and the auxiliary charger 8 supplies charging current to the storage batteries 31 to charge them individually. Note that in this case as well, maintenance charging of the assembled battery 3 by the rectifier 2 is continued. Note that variations in storage battery characteristics manifest as variations in the terminal voltage of individual batteries;
This also appears as variations in the electrolyte specific gravity of the storage battery, so
It is also possible to measure the electrolyte specific gravity of the storage battery and charge the batteries with low specific gravity values individually.1 It is also possible to measure both the terminal voltage and electrolyte specific gravity and charge them individually based on the obtained results. is also possible.

FIG. 3 is a block diagram showing a second embodiment of the present invention, and the same symbols in this figure as in FIG. 2 indicate the same things. 21 indicates that a second output for independent charging is provided in the output of the rectifier 2, and by utilizing this, the secondary charging 1! There is an advantage that the container 8 can be omitted. The operation and implementation method are all the same as in the second embodiment.

As explained above, by implementing the present invention, there is no need for maintenance personnel to constantly monitor storage batteries, and only batteries with poor characteristics can be individually charged automatically.
It is no longer necessary to perform equal charging of assembled batteries. Therefore, among the storage batteries constituting the assembled battery, it is possible to prevent a decrease in the lifespan due to overcharging of a storage battery with good characteristics, which has the following advantages: 1) Maintainability 1) The assembled battery can be used as a backup energy source with high reliability There is.

[Brief explanation of the drawing]

jllm is a block diagram showing the system configuration of a general DC power supply device, FIG. 2 is a block diagram showing one embodiment of the present invention, 3rd wJ is a block diagram showing another embodiment of the present invention,
It is. Code explanation 1... commercial power supply, 2... rectifier, 3.
・Four sets of batteries 14...Load, 5...Data recording device, 6...Controller, 8...
・・Auxiliary charger, (31, 32, 3n°
...Individual storage battery, (51, 52, ...5
n)...Terminal connected to data recording sensor) (
61-t 62 ,...6n)...Switch drive signal, (71,72,...7n)
...Electromagnetic switch, 21...Independent charge output agent of rectifier Patent attorney Akio Namiki Patent attorney Kiyoshi Matsuzaki

Claims (1)

[Claims] l) In a DC power supply device that receives commercial power, rectifies it with a rectifier and supplies it to a load, and uses the output of the rectifier to float charge an assembled battery as a reserve energy reserve, 1 the assembled battery is configured. means 1 for measuring the characteristic data of each storage battery, and for storage batteries whose data has deteriorated below the reference value, a switch provided for each storage battery is turned on to measure the characteristic data from the second output side of the rectifier. A DC power supply device comprising: a controller that performs charging from a separately prepared auxiliary charger;