JPH08203567A - Deteriorated state detection device for lead-acid battery - Google Patents

Abstract

PURPOSE: To safely detect floating charge voltage with less labor in a short time without reducing reliability by installing a voltage detection device in a storage battery and performing an inspection of the floating charge voltage and a confirmation of good conditions of the storage battery with the eyes of a maintenance worker. CONSTITUTION: A voltage detection device main body 21 is detachably attached to a position, where a maintenance worker can easily observe a display of the storage battery main body 21 with his eyes, by sticking with a both-face adhesive tape. Therefore, a voltage detection terminal 22 is easily detached/ attached without disconnecting the main wiring of the main body 11. It can be thus constituted and manufactured independently from the main body 11 so that the structure of the storage batteries does not involve any change and complicatedness in both cases of easy inspection works such as the number of respective storage batteries for constituting a set battery is less and a large working space is secured and of difficult inspection works without using it. This constitution suppresses the cost increase and, even in the case of failure of the voltage detection part, exchange according to storage batteries is not required so as not to reduce reliability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the deterioration state of a lead storage battery by inspecting the floating charging voltage and detecting the voltage drop thereof as a method for detecting the deterioration state of the lead storage battery. .

[0002]

2. Description of the Related Art Conventionally, as a method of detecting the deterioration state of a cathode absorption type sealed lead-acid battery, there is a means for checking the floating charging voltage. This is an effective means to detect a deterioration state such as an internal short circuit or poor airtightness, but in order to fully check the floating charging voltage of the storage batteries stored in the cubicle / stand, etc. Apply a voltage detection probe to each terminal of the individual storage batteries that make up the
It is necessary to read the actual measurement value, and in recent years, with the high-density storage of storage batteries, there is a drawback that a large amount of labor and time are required for the work due to the reduction of the work space.

Therefore, as a method of solving this drawback and inspecting the floating charging voltage with a small amount of labor in a short time, an output function when one or more cell voltages fall below a set value is built into the battery. A method has been proposed in which the voltage detection lines are concentratedly drawn from the terminals of the cathode absorption sealed lead-acid battery or individual storage batteries to the terminal block on the front surface of the cubicle / frame.

[0004]

However, in the former method, the structure of the storage battery is complicated because each cell of the storage battery has a voltage detection unit, the cost is high, and the voltage detection unit is damaged. In this case, the storage battery must be replaced, so stop the backup function once,
There is a problem in that the main wiring connection must be disconnected and the reliability is reduced.

In the latter method, the voltage detection lines are drawn from the individual terminals of the storage battery, which complicates the wiring and increases the possibility of erroneous connection, and the voltage detection lines are intensively arranged on the front surface. In the case where the assembled battery is connected in series with a large number of storage batteries, there is a problem that high voltage is concentrated in one place, which poses a high risk.

[0006]

SUMMARY OF THE INVENTION The present invention has been made under the background as described above, and monitors the terminal voltage of each storage battery in the individual storage batteries constituting the battery pack and displays the voltage drop indicator LED. Display allows the maintenance worker to visually check the floating charge voltage and check the good condition of the storage battery, thus solving the above-mentioned problems and safely and without lowering the reliability. It is an object of the present invention to provide a deterioration detecting device for a lead storage battery, which enables the inspection of the above in a short time with little labor.

The deterioration detecting device for a lead storage battery according to the present invention includes a voltage drop display LED which is turned on when the voltage becomes equal to or less than a preset voltage set value v2 from the relationship between the floating charging voltage and the storage battery remaining capacity. A battery detector is equipped with a voltage detection device that is equipped with a device body that is detachable from the storage battery, and a voltage detection terminal that can be attached to and removed from the storage battery terminal without disconnecting the main wiring of the storage battery, to form a battery pack. The feature is that the maintenance worker can visually check the terminal voltage of each storage battery in each storage battery and check the floating charging voltage and confirm the good condition of the storage battery by displaying the voltage drop display LED. And

[0008]

In the deterioration detecting device for a lead storage battery according to the present invention, the storage battery and the device main body can be attached and detached, and the voltage detection terminal can be easily attached and detached without disconnecting the main wiring of the storage battery. It is possible. Therefore,
The deterioration state detection device for a lead storage battery of the present invention has a structure independent of the storage battery and can be manufactured, so that the number of individual storage batteries constituting the assembled battery is small and the work space is wide, Even if the inspection work is easy, or if the inspection work is difficult without using it, the structure of the storage battery does not change and does not become complicated. For this reason, the cost does not become high, and even if the voltage detection unit is damaged, it is not necessary to replace each storage battery, and therefore the reliability does not decrease.

In addition, since the terminal voltage of each storage battery is monitored in each storage battery that constitutes the assembled battery, the possibility of erroneous connection between the display unit and the storage battery that makes a pair is low. Furthermore, since the voltage detection line is not unnecessarily long and is not concentrated in one place, there is little risk of applying a high voltage.

The voltage drop display LED is for constantly monitoring the terminal voltage of each storage battery, and is turned on when the preset value v2 or less is reached. In a sealed lead-acid battery, if deterioration such as internal short-circuit or airtightness occurs, as the deterioration progresses, only the defective storage battery will gradually increase in self-discharge rate compared to other good storage batteries, and will float due to smaller polarization. The charging voltage drops. When the amount of self-discharge becomes larger than the amount of charge, the specific gravity of the electrolyte solution further decreases, the active substance gradually becomes discharged, the floating charge voltage becomes even lower, and the remaining capacity of the storage battery decreases.

If the floating charge voltage drops due to the deterioration as described above due to the display of the voltage drop display LED, the maintenance worker selects the defective battery from the individual storage batteries constituting the battery pack. The terminal voltage of the storage battery can be visually determined without actually measuring it. In addition, even in the case of normal and regular inspection, the maintenance worker may
By confirming that the ED is not lit, it is possible to easily visually confirm the good condition of the storage battery.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings.

FIG. 1 is a plan view of a storage battery equipped with a deterioration detecting device for a sealed lead storage battery according to the present invention.
Reference numeral 11 is a storage battery main body, and 21 is a detection device main body.
FIG. 2 is a front view of a storage battery to which the deterioration detecting device for a sealed lead storage battery according to the present invention is attached. FIG. 3 is a side view of the device body 21, and 25 is a double-sided tape for attaching the device body 21 to the storage battery body 11. In this example, the main body 21 of the apparatus is attached to the place where the maintenance worker can easily see the display with the double-sided tape 25, so that the display can be attached and detached. Further, in this example, the device main body 21 is
Although it is attached to the storage battery body 11, the attachment location may be a connection plate cover, a cubicle body, or the like as long as the display is easy to understand and attachment is possible.

FIG. 4 is an enlarged plan view of a connecting portion for detecting the terminal voltage of the storage battery, and 22 is an example of the voltage detecting terminal. Reference numeral 31 is a connecting plate, and 32 is a hexagon bolt. In this example, the hexagon bolt 32 has conduction, and the voltage detection terminal 22 is made of phosphor bronze and has conduction and elasticity. FIG. 5 is a front view showing a state before the voltage detection terminal 22 is attached.
Is a washer, and 12 is a storage battery terminal. In this example, the storage battery terminal 12 is in a state in which a bolt mounting hole is processed, and a hexagon bolt 32 is screwed into this, and the connection plate 31 is crimped to the storage battery terminal 12. Since the main wiring is connected, it is not preferable in actual operation to remove the connection plate 31 unnecessarily and loosen the hexagon bolt 32. In this example, the voltage detection terminal 21
Is inserted into the hexagon bolt 32 as it is, and the voltage detection terminal 22
Since it is restrained by the elastic force of, the connection can be easily attached and detached without disconnecting the main wiring connection.

FIG. 6 is an example of a circuit diagram of a deterioration state detecting device for a sealed lead-acid battery according to the present invention, in which 23 is a voltage drop display LED and 24 is a power supply display LED. Although the power supply display LED 24 is not an essential component in the present invention, it is effective when the voltage detection terminal 22 is forgotten to be connected or the voltage detection unit is damaged such as a disconnection. 26 is a variable resistor and 27 is a fixed resistor. Further, 28 is a reference voltage generator, and 29 is an operational amplifier. The terminal voltage of the storage battery is divided by the ratio of the variable resistor 26 and the fixed resistor 27, and the operational amplifier 29 causes the reference voltage generator 2 to generate a voltage.
8 outputs are compared. The terminal voltage of the storage battery is the set value v2
In the following cases, the setting value v2 is set in advance by adjusting the variable resistor 26 so that the L level and H level of the operational amplifier are switched, the power source display LED 24 is turned off, and the voltage drop display LED 23 is turned on. Keep it.

FIG. 7 is an example showing the relationship between the floating charging voltage and the remaining capacity of the storage battery, v1 is a normal floating charging voltage value, and v2 is a set value for lighting the voltage drop display LED. In this example, the set value v2 is set equal to the handling reference value (lower limit) that has been conventionally operated and managed by the maintenance worker by actually checking the floating charging voltage.

FIG. 8 is an example showing the volume energy of the assembled battery using the present invention. Compared with the conventional system, the working space can be halved, and the assembled battery has a volume energy density of about 30. % Improved.

[0018]

As described above, according to the deterioration detecting device for a sealed lead storage battery according to the present invention, the terminal voltage of each storage battery in each storage battery constituting the assembled battery is monitored, and the voltage drop display LED is displayed. Display allows the maintenance worker to visually check the floating charging voltage and confirm the good condition of the storage battery, which solves the problems of the conventional method and allows the floating to be performed safely without lowering the reliability. Since it is possible to check the charging voltage with a small amount of labor in a short time, its industrial value is extremely large.

[Brief description of drawings]

FIG. 1 is a plan view of a storage battery equipped with a deterioration state detection device for a lead storage battery of the present invention.

FIG. 2 is a front view of a storage battery equipped with a deterioration state detection device for a lead storage battery of the present invention.

FIG. 3 is a side view of the detection device body.

FIG. 4 is an enlarged plan view of a connection portion for detecting a terminal voltage of a storage battery.

FIG. 5 is a front view showing a state before the voltage detection terminal is attached.

FIG. 6 is a circuit diagram showing an example of a circuit of a deterioration state detection device for a lead storage battery according to the present invention.

FIG. 7 is a characteristic diagram showing an example of a relationship between a floating charging voltage and a storage battery voltage.

FIG. 8 is an explanatory diagram showing an example of volume energy of an assembled battery using the present invention.

[Explanation of symbols]

 11 Storage battery main body 12 Storage battery terminal 21 Detection device main body 22 Voltage detection terminal 23 Voltage drop display LED 24 Power supply display LED 25 Double-sided tape 26 Variable resistance 27 Fixed resistance 28 Reference voltage generation section 29 Operational amplifier 31 Connection plate 32 Hexagon bolt 33 Washer v1 Floating charging Voltage value v2 Voltage setting value

Claims (1)

[Claims] 1. A device main body equipped with a voltage drop display LED which is turned on when the voltage is below a preset voltage setting value v2 based on the relationship between the floating charging voltage and the storage battery remaining capacity, and is detachable from the storage battery. , And a voltage detection device that can be attached to and removed from the storage battery terminal without disconnecting the main wiring of the storage battery, and attaches the voltage detection device to the storage battery, and the terminals of each storage battery in the individual storage batteries constituting the assembled battery A deterioration state detection device for a lead storage battery, characterized in that a maintenance worker can visually check the floating charging voltage and confirm the storage battery in a good state by monitoring the voltage and displaying a voltage drop display LED.