JPH0730448U - Battery automatic water replenisher - Google Patents

Abstract

(57) [Summary] [Purpose] While automatically replenishing water to the battery, even if the replenishment pipe is disconnected at the connection part when replenishment of water is completed,
Make sure that the water does not overflow from the supply pipe. [Structure] The water in a water tank 17 is pressurized by a pump 19 and supplied to a battery 12 via replenishment pipes 13 and 14 and a connecting portion 15. When the liquid level sensor 28 detects that the battery liquid is full, the ECU 27 switches between the forward / reverse rotation contactors M ₁ and M ₂ to reverse the motor 20 and the pump 19 to remove the water remaining in the replenishment pipes 13 and 14. Since it sucks back, water does not overflow from the inside of the supply pipe even if the connection portion 15 is disconnected. In addition, a battery charger 34 may be provided inside the main body 16 of the automatic water replenishing device to automatically and continuously replenish water and charge the water. To power line 35
It is also possible to integrally provide the connecting portions between the power feeding lines 37 and 36 and the power feeding lines 37 and 38 to simplify the connecting and disconnecting work.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic water refilling device for a battery, which is suitable for use with a battery mounted on an electric vehicle such as an electric forklift that operates by a battery (storage battery).

[0002]

[Prior art]

 Batteries used in electric vehicles such as battery-operated forklifts generally have a very large storage capacity and a high voltage such as 24V or 48V, and the unit of output voltage 2V that constitutes them. Since the number of cells that are storage batteries is very large, such as 12 or 24, as one of the maintenance work, when replenishing water by hand when the battery fluid level drops, Pull out a very heavy battery together with the battery case to the outside of the vehicle body, remove the cap screwed into the liquid injection port provided in each battery case of each cell, and carefully rehydrate each cell to the prescribed level. It takes a lot of work, such as screwing the cap again after performing the work, which is not only extremely troublesome but also takes a long time to work. .

To address this problem, the applicant of the present invention has previously described in Japanese Utility Model Application Laid-Open No. 58-85762 so that water can be collectively replenished easily even when the battery is mounted on the vehicle. We are proposing a complete battery liquid replenishing device. In this conventional technique, as shown in FIG. 6, in a battery A having a plurality of cells, the liquid injection port 4 opened at the upper end of the battery case 1 of each cell is Through a water shutoff valve 5 equipped with a float that automatically opens and closes according to the level of a, and a replenishment pipe B ₁ , a common sub-tank 6 is provided above the battery A. When the level of the battery liquid a in any one of the battery cases 1 becomes lower than a predetermined height by the automatic connection, the water b is automatically caused to flow down from the sub tank 6 by gravity to replenish the water. At the same time, when the inside of each battery case 1 reaches a predetermined level, the water stop valve 5 stops the water supply.

A liquid level detection switch S is provided in the sub tank 6, and when the level of water in the sub tank 6 becomes lower than a predetermined height, the liquid level detection switch S is activated by a signal. By driving the pump P by the electric power of the battery A itself, water is replenished from the large replenishment tank C prepared outside to the sub tank 6 through the replenishment pipe B _2, and the water b in the sub tank 6 is replenished. It is designed to maintain the level of a certain level. In FIG. 6, 2 is the electrode plate of the battery A, 3 is two kinds of electrodes connected to the electrode plate 2, 7 is a connecting portion between the replenishment pipe B ₁ and the replenishment pipe B ₂ including the sub tank 6, and 8 is When the signal from the liquid level detection switch S is received, the level of the water b in the sub tank 6 is lowered, and an alarm notifying that the water is being replenished from the replenishment tank C to the sub tank 6 by the pump P, 9 is sent to the pump P and the alarm 8. Power supply cords, 10 respectively indicate clips attached to the tip of the cord 9.

Apart from that, although not specifically shown, the intermediate water tank such as the sub tank 6 used in the prior art shown in FIG. 6 is not provided, and the supply pipe B ₁ and the supply pipe are not provided. B ₂ and B ₂ are directly connected by the connecting portion 7, and the water b in the replenishment tank C pressurized by the pump P is directly distributed from the replenishment pipe B ₂ to the liquid injection port 4 of each battery case 1 and sent. An automatic water replenishing device for a battery, which replenishes water by continuing the operation of the pump P until all the water shutoff valves 5 provided in the battery case 1 are closed, is also put to practical use.

[0006]

[Problems to be solved by the device]

According to the above-mentioned conventional techniques, in all cases, the batch water supply to the battery can be almost automatically carried out while the battery is mounted on the vehicle, which makes the water supply work much easier than the manual work. On the other hand, some problems occur. First, when the replenishment work for the battery is completed and the replenishment pipe B ₁ and the replenishment pipe B ₂ are separated at the connection portion 7 shown in FIG. 6, the stagnation occurs in the replenishment pipes B ₁ and B _2. Since there is a fear that the water that has been discharged overflows from both ends formed by the disconnected connection part 7, an appropriate container should be prepared when disconnecting the connection part 7, and a supply pipe should be provided. When the end of B _{2 on} the side of the connecting portion 7 is inserted, or if water spills from the end of the supply pipe B ₁ or B ₂ onto the upper surface of the battery A, it is necessary to wipe it off. In the example of FIG. 6, since the manual valve 11 to the portion near the connection portion 7 of the supply pipe B ₁ is provided, by closing it at refill work end, the water overflowing from the supply pipes B ₁ represents approximately It can be stopped completely, but no measures have been taken against the supply pipe B ₂ .

Further, in order to efficiently perform maintenance work on the battery A, by integrating an automatic water replenishing device of the battery with a charger, the water replenishing work and the charging work can be continuously and automatically performed by the same system. In such a case, in such a case, at the connecting portion 7 of the water supply pipes B ₁ and B ₂ , there is a power supply line for supplying a charging current from the charger to the battery A. It is convenient to install the connection part integrally so that the connection of the water b supply pipe and the connection of the power supply line can be completed at the same time by the connection work of the single connection part. However, if the water remaining in the supply pipe may overflow from the end that forms the water connection 7 when the connection 7 is disconnected as described above, the connection of the water supply pipe should be performed. It is completely impossible to install the charging power supply line connection part integrally with the part 7.

The present invention solves the above problems in the prior art and can automatically and smoothly replenish water to a battery without pulling the battery out of an installation location such as a vehicle battery room. The purpose of the invention is to prevent the water remaining in the supply pipe from overflowing from the connection part when the water supply pipe is disconnected after the water supply work is completed.

The present invention also provides a water supply pipe connection for charging a battery by preventing water from overflowing from the water supply pipe connection when disconnecting the connection. It is possible to install an electric wire connection part integrally, and by connecting a single connection part, the connection of the water supply pipe and the connection of the power supply line for charging are completed at the same time to replenish the battery. Another object of the invention is to be able to automatically perform work and subsequent charging work sequentially.

[0010]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention provides a water tank, a pump for pressurizing water stored in the water tank to supply it to a battery through a supply pipe, and a rotary drive for the pump. Motor, a connection part provided in the middle of the replenishment pipe, a liquid level sensor provided on the battery side, and when the end of replenishment water is detected by the liquid level sensor, it remains in the replenishment pipe. Means for rotating the pump in the reverse direction by the motor so as to suck the existing water back into the water tank.

The present invention also provides an automatic water replenishing device for the above-mentioned battery, in which a charger is housed in the main body in addition to the automatic water replenishing device, and in some cases, from the battery charger to the battery. There is also provided an automatic rehydration device for a battery as described above, in which the connection of the extending power supply line is integrated with said connection for replenishing water.

[0012]

[Action]

 In the basic automatic water replenisher for a battery according to the present invention, the motor rotates the pump in the forward direction to pressurize the water in the water tank and supply the pressurized water to the battery through the replenishment pipe having the connecting portion. However, when full liquid is detected by the signal of the liquid level sensor, the driving direction of the pump is automatically reversed by the operation of the means for rotating the pump in the reverse direction, and the pump remains in the supply pipe. Suck back the water that is stored in the water tank. Therefore, since the water in the supply pipe is removed, even if the connection portion is disconnected, there is no possibility that the water will overflow from the end portion of the supply pipe on the connection portion side.

If a battery charger is provided along with such an automatic water replenishing device for a battery, it is possible to automatically perform recharging as well as replenishing water, which simplifies maintenance work, and especially for water supply pipes and charging. Integrating the power supply line connection makes it easier to connect and disconnect pipes and wires before and after water supply and charging. In this case, the connection between water and electricity will be integrated, but at the end of replenishment, the pump will automatically reverse to suck back the water in the supply pipe, so when disconnecting, there will be no water from the connection. There is no risk of overflow, and there is no concern about deterioration of electrical insulation.

[0014]

【Example】

 FIG. 1 shows the entire structure of an automatic water replenishing device for a battery as an embodiment of the present invention. Reference numeral 12 denotes a battery, the inside of which is divided into a plurality of cells as in the conventional example shown in FIG. 6, and all of them are collectively replenished with water from the replenishing pipe 13 to the battery case of those cells. A water replenishment pipe 14 in the form of a manifold is connected to a liquid injection port (not shown) of the battery case shown in FIG. 1. Since the structure of this portion is similar to that of the conventional example shown in FIG. Not shown in detail. In order to easily connect the water supply pipes 13 and 14 to each other, a connection portion 15 is provided so as to be attached to the wall surface of the battery room of the vehicle body or the like.

In some cases, a battery charger 34 is installed inside the main body 16 of the automatic water refilling device, and its power supply lines 35 and 36 are drawn out from the main body 16 along the supply pipe 13 and the connection of the power supply line is performed. It is also possible to place the part integrally with the connecting part 15. In this case, the power supply lines 37 and 38 after the connection portion 15 are connected to the electrodes of the battery 12 along the supply pipe 14.

Inside the main body 16 of the automatic water refilling device, a water tank 17 containing water such as distilled water for refilling water, and then a pipe 18 for sucking up the water to replenish the replenishing pipe 13 and the connecting portion 15. A pump 19 for pumping water to the supply pipe 14 of the battery 12 is provided. However, it does not matter if the water tank 17 is placed outside the casing of the main body 16. Reference numeral 20 denotes a series winding motor that rotationally drives the pump 19, and includes a field coil 21 and brushes 22 and 23.

Both ends of the field coil 21 of the motor 20 are connected to the movable contacts c and c ′ of the forward / reverse rotation contactors M ₁ and M ₂ for the motor 20, respectively. One fixed contact a of the contactor M ₁ is connected to the brush 22 that contacts the commutator, and the other fixed contact b is connected to the positive electrode of the power supply 24. Also, 'with is connected to the fixed contact b of the contactors M _1, other fixed contact b' one fixed contact a of the contactor M ₂ is connected to the fixed contact a of the contactor M _1. The brush 23, which also contacts the commutator, is connected to one pole of the contact SW ₁ of the relay, and the other pole of the contact SW ₁ is connected to the negative electrode of the power supply 24. The movable contacts c and c ′ of the contactors M ₁ and M ₂ are simultaneously driven by the solenoid coil 25, and the contact SW ₁ of the relay is opened and closed by the solenoid coil 26. As the power supply 24, an external AC power supply may be rectified and used, or the battery 12 itself may be used. The solenoid coils 25 and 26 are both connected to an electronic control unit (ECU) 27 and receive control signals therefrom.

A detection signal from the liquid level sensor 28 attached to the battery 12 is input to the ECU 27. In FIG. 1, only one liquid level sensor 28 is shown as a representative, but when a liquid level sensor is provided for each of a plurality of cells of the battery 12, a plurality of liquid level sensors are used. Further, when the sub-tank 6 is provided as in the conventional technique shown in FIG. 6, only one liquid level detection switch S provided therein can be used as the liquid level sensor 28. In any case, the cell of each cell of the battery 12 is provided with something like the water shutoff valve 5 with a float shown in the conventional example of FIG. 6 so that the battery fluid in each cell is appropriate. When the level is reached, the water shutoff valve 5 is closed to stop the water supply to the cell. Reference numeral 29 shown in FIG. 1 is a power switch, which is provided in a power supply circuit for supplying electric power from an external power supply or the battery 12 to the main body 16 of the automatic water replenishing device, which also sends one signal to the ECU 27. input.

Although the present invention does not make it an indispensable constituent element, in some cases, as described above, the charger 34 can be incorporated in the main body 16 of the automatic rehydration device. An example of such a case is schematically shown in a part of FIG. The charger 34 is composed of an external AC power source 39, a transformer 40, a rectifier circuit 41, etc., and a primary circuit (or a secondary circuit) of the transformer 40 is provided with a contact SW _{2 of} a relay for connecting and disconnecting it. The contact SW ₂ is driven by a solenoid coil 42 controlled by the ECU 27. Needless to say, in the case of implementing the present invention, a charger provided separately from the main body 16 of the automatic water replenishing device may be used, and its controller is a controller such as the ECU 27 of the automatic water replenishing device 16. It may be another.

FIG. 2 shows an outline of the first embodiment of the ECU 27 and its related parts. The first embodiment exemplifies a control device in the case where only the automatic water replenishing device in which the charger 34 shown in FIG. 1 is not incorporated in the main body 16 of the automatic water replenishing device. The contents of the ECU 27 itself are the same as those well known in the art and include a CPU 30 composed of a microprocessor, memories 31 such as ROM and RAM, an input port 32, and an output port 33. At least the output signal (liquid level signal X ₁ ) of the liquid level sensor 28 is input to the input port 32. The results calculated by the CPU 30 while exchanging signals with the input port 32 and the memory 31 are output from the output port 33 as control signals Y ₁ and Y ₂ to the solenoid coils 26 and 25 connected thereto. Is output. As described above, the solenoid coil 26 drives the contact SW ₁ of the relay and the solenoid coil 25 drives the forward and reverse rotation contactors M ₁ and M ₂ . The liquid level signal X ₁ and the control signals Y ₁ and Y ₂ are binary signals that can take only binary values 0 and 1, and the meanings of these signals are shown in the table in FIG. It is shown. Incidentally, reference numeral 45 in FIG. 2 denotes a power supply terminal of the liquid level sensor 28.

FIG. 3 illustrates a control program executed by the ECU 27 in the first embodiment. Hereinafter, the operation of the main body 16 of the automatic water replenishing device will be described with reference to FIG. The control program of FIG. 3 starts at the time when the power switch 29 is turned on, and thereafter, at a predetermined short time until the power switch 29 is turned off while the main body 16 of the automatic water replenishing device is operating. And is repeatedly executed by the CPU 30 provided in the ECU 27.

When the program starts, the control signals Y ₁ and Y ₂ are set to 0 in step 101. Since the control signal Y ₁ is 0, that is, the contact SW _{1 of the} relay is OFF, the drive current to the solenoid coil 26 is cut off. Further, since the control signal Y _{2 is} also 0, that is, the motor 20 is rotating in the forward direction, the contact points a and a ′ of the forward and reverse contactors M ₁ and M ₂ are movable contact points c and It is connected to the field coil 21 via c '. Then, in step 102, the liquid level signal X ₁ detected by the liquid level sensor 28 is read from the input port 32. If the liquid level signal X ₁ is 0, it means that the battery level of the target battery cell has reached a predetermined level and is full of water, which is also the water shutoff valve (stop of the shutoff valve in FIG. 6). It also means that the water valve 5) is closed. On the other hand, if the liquid level signal X ₁ is 1, it means that the battery liquid is insufficient and has not yet reached the predetermined level, and it is necessary to continue the water supply.

Whether or not the liquid surface signal X ₁ is 1 is determined in step 103. If the judgment result is not 1, that is, 0, it means that the level of the battery liquid in the battery case of the battery 12 has reached a predetermined height (full water), and therefore the following processing is unnecessary. , The calculation of the cycle ends. If it is determined in step 103 that the liquid level signal X ₁ is 1 (insufficient), the process proceeds to step 104, and the control signal Y _{1 is set} to 1, so the solenoid coil 26 is energized and the relay contact SW ₁ Becomes ON. As a result, the motor 20 starts to rotate by the electric power supplied from the power source 24 to drive the pump 19, but its rotation direction is a forward rotation because the control signal Y ₂ remains 0. Therefore, the water in the water tank 17 is supplied to the battery case of the battery 12 by the pump 19 through the replenishing pipe 13, the connecting portion 15, and the replenishing pipe 14 to replenish the water. Then, when the level of the battery fluid in the battery case reaches a predetermined level, the water shutoff valve stops the replenishment of water beyond each cell.

In step 105, the liquid level signal X ₁ detected by the liquid level sensor 28 is read again from the input port 32. Then, in step 106, it is determined whether or not the liquid level signal X ₁ is zero. When a plurality of liquid level sensors 28 are provided, it is determined that all of them output the liquid level signal X ₁ = 0. If the determination result is not 0, that is, if it is 1, the process returns to step 105 and the signal reading and determination are repeated while continuing the water replenishment.

If the determination result in step 106 becomes 0 in this way, the battery liquid in the battery 12 has reached a predetermined level, so replenishment of water is complete, and the process proceeds to step 107 and the control signal Y ₂ Is set to 1. Since the control signal Y ₁ has already been set to ₁ in step 104, it will be continued. As a result, the motor 20 continues to rotate, but when the control signal Y ₂ becomes 1 in the direction of rotation, the solenoid coil 25 is energized, and the forward and reverse contactors M ₁ and M ₂ are switched, thereby enabling the rotation. The moving contacts c and c ′ come into contact with the fixed contacts b and b ′, and the directions of the currents flowing in the field coils 21 are opposite to each other, so that the motor 20 starts reverse rotation.

When the pump 19 is rotationally driven in the reverse direction in this way, water is sucked from the replenishment pipe 13 and returned to the water tank 17 via the pipe 18, so that it is attached to the battery 12. All the water accumulated in the supply pipe, including the water in the supply pipe 14, is sucked out by the pump 19, and the water may overflow from the ends of the supply pipes 13 and 14 even if the connecting portion 15 is disconnected. Disappears. The most common feature of the present invention is that such a treatment is automatically performed when the water supply is completed. In addition, inside the battery 12, a space is provided between the liquid injection port and the full surface of the liquid as in the case of a normal battery, and when the liquid is sucked back, the battery liquid in the battery case is sucked out. There is no fear of returning to tank 17.

The sucking back of water by the reverse rotation of the pump 19 is performed for 3 seconds, for example, as shown as step 108. Of course, this time is freely set according to the time required for all the water in the supply pipe to be sucked out. Actually, in step 108, the timer for setting the suck back time is started and it is determined whether or not the set time has elapsed. When the suck-back time is over, the control signal Y _{1 is set} to 0 in step 109. Therefore, the energization of the solenoid coil 26 is released and the contact SW _{1 of} the relay is opened, so that the motor 20 and the pump 19 are stopped. In this way, the refilling process of the automatic refilling device is completed.

FIG. 4 shows an ECU 27 ′, which is a modification of the electronic control unit (ECU) 27 in the first embodiment shown in FIG. 2, and a second embodiment including parts related thereto. In this example, the main body 16 of the automatic water refilling device can automatically recharge the battery 12 continuously, and the charger 34 selectively shown in FIG. It is provided inside the main body 16. In addition, in this example, not only the connection portion 15 is the connection portion of the supply pipes 13 and 14, but also the electrical supply lines 35 and 36 on the charger 34 side and the electrical supply lines 37 and 38 on the battery 12 side are electrically connected. Since it also serves as a large connecting portion, the connecting portion 15 is formed by integrating the connecting portions for both water and electric power, independently of each other, but in a close positional relationship. This simplifies the work of connecting and disconnecting the connecting portion 15 before and after replenishing water and charging.

As shown in FIG. 4, in the second embodiment, in addition to the liquid level signal X ₁ , the voltage signal from the terminal 44 of the battery 12 via the A / D converter 43 is input to the input port 32 of the ECU 27 ′. Is input and the terminal voltage, which is an analog signal, becomes less than or equal to a predetermined voltage value, the voltage signal X ₂ which is a digital signal is 0 due to the action of the A / D converter 43, and conversely the predetermined voltage. It becomes 1 when the value is exceeded. A solenoid coil 42 for driving a contact SW ₂ of the relay is connected to the output port 33 of the ECU 27 ′ so as to output a control signal Y ₃ .

Next, referring to FIG. 5 showing a control program of the ECU 27 ′ according to the second embodiment, the operation of the battery automatic water refilling / charging device of FIG. 1 when the battery charger 34 is also provided will be described. To do. However, the parts related to the liquid level signal X ₁ and the control signals Y ₁ and Y ₂ are substantially the same as those in the first embodiment, and the steps 201 to 209 in the control program shown in the flowchart of FIG. The processing is also almost the same as the processing of steps 101 to 109 shown in FIG. Therefore, the description of the overlapping portions will be omitted.

The difference in the processing of these steps, which are mostly the same, is that first, at the time of start, the control signal Y _{3 is set} to 0 in step 201, and the contact SW of the relay is turned on without energizing the solenoid coil 42. ₂ is turned off and the charger 34 is stopped. Next, in steps 202 and 205, the voltage signal X ₂ is read in addition to the liquid level signal X ₁ . Also in steps 204, 207, and 209, the control signal Y _{3 is set} to 0, and the idle state of the charger 34 is continued. The process of sucking back water from the supply pipes 13 and 14 by reversing the pump 19 in steps 207 and 208 is also the same.

The portion added to the flowchart shown in FIG. 3 is the portion after step 210. In step 210, the liquid level signal X ₁ and the voltage signal X ₂ are read as in steps 202 and 205. Processing is performed, and it is determined in step 211 whether the voltage signal X ₂ is 0, that is, whether the terminal voltage of the battery 12 is lower than a predetermined voltage. When the jump is made from step 203, the judgment of step 211 is also received. As a result of the determination, if the terminal voltage is not lower than the predetermined voltage, the control ends because there is no need to charge any more, but if it is low, the process proceeds to step 212 and the control signal Y _{3 is set} to 1. Since the control signals Y ₁ and Y ₂ remain 0, the contactors M ₁ and M ₂ for the forward and reverse rotations of the motor 20 are set in the forward rotation direction, but the contact SW _{1 of} the relay is OFF. Therefore, the motor 20 and the pump 19 do not rotate and the stopped state is maintained.

When the control signal Y ₃ is set to 1 in step 212, the solenoid coil 42 is energized, the relay contact SW ₂ is turned on, and the charger 34 starts to operate. The power of the AC power supply 39 is adjusted to a predetermined voltage by the transformer 40, converted into DC by the rectifier circuit 41, and supplied from the power supply lines 35 and 36 to the battery 12 via the connection portion 15 and the power supply lines 37 and 38. , Charge the battery 12. Then, in step 213, the liquid level signal X ₁ and the voltage signal X ₂ are read again, and it is determined in step 214 whether the voltage signal X ₂ is 1, that is, the terminal voltage of the battery 12 is higher than a predetermined value. It is determined whether or not. If it is determined not to be high, the process returns to step 213 to repeat signal reading and determination, and charging is continued during that time.

If the voltage signal X ₂ is determined to be 1 in step 214, it means that the charging has been sufficiently performed, and therefore the process proceeds to step 215, and all the control signals Y ₁ , Y ₂ and Y ₃ are set to 0. . As a result, the contacts SW ₁ and SW ₂ of the relay are both turned off, and the automatic rehydration system for the battery with the charger shown in FIG. 1 stops operating. At this time, the control signal Y ₂ becomes 0, so that the contactors M ₁ and M ₂ for the normal / reverse rotation for the motor 20 are brought to the normal rotation state of FIG. 1 and ready for the next start.

In this way, after completely replenishing water and charging, the connecting portion 15 is manually separated, but by simply disconnecting the connecting portion 15, both the supply pipe and the power supply line are separated. , Makes the work very easy. Further, as described above, since the water in the supply pipes 13 and 14 is completely removed by the sucking back action by the automatic reverse rotation of the pump 19, even if the connecting portion 15 is disconnected, those supply pipes are not supplied. Water does not overflow from the ends, and there is no risk of water spilling and wetting the surroundings, and there is also no risk of water penetrating into the connection part of the power supply line and degrading insulation. In addition, various measures to prevent water from spilling are also unnecessary.

[0036]

[Effect of device]

 According to the present invention, the problems in the prior art can be solved and not only can the water be automatically refilled without the battery being pulled out from the installation location such as the battery room of the vehicle, but also the refilling work can be performed. When you finish and disconnect the connection part, it is possible to automatically prevent water from overflowing from the connection part.Therefore, you can use a container to catch water spilling on the top surface of the battery, etc. It eliminates the need to wipe off water.

Further, according to the present invention, it is possible to completely prevent water from overflowing when disconnecting the connection portion as described above, and therefore, the connection portion of the power supply line for charging the battery is connected to the water source. It becomes possible to install it together with the connection part of the supply pipe and install it side by side, and by connecting the connection part, the connection of the water supply pipe and the connection of the power supply line can be completed by a single operation, so the battery It is possible to automatically and easily perform the water refilling work and the subsequent charging work in sequence.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing the overall configuration of an automatic water rehydration device for a battery as an embodiment of the present invention.

FIG. 2 is a system configuration diagram schematically illustrating a first embodiment of a control device in the battery automatic water replenishing device of FIG.

FIG. 3 is a flowchart showing a control program of the first embodiment.

FIG. 4 is a system configuration diagram schematically showing a second embodiment of the control device in the battery automatic water refilling device of FIG. 1.

FIG. 5 is a flowchart showing a control program of a second embodiment.

FIG. 6 is a cross-sectional view illustrating a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Battery container 4 ... Liquid injection port 5 ... Water stop valve 6 ... Sub tank 7 ... Connection part 12 ... Battery 13,14 ... Water supply pipe 15 ... Connection part 16 ... Main body of automatic water replenisher (also charging device) 17 ... Water tank 19 ... Pump 20 ... Motor 21 ... Field coil 22, 23 ... Brush 24 ... Power supply 25, 26 ... Solenoid coil 27, 27 '... Electronic control unit (ECU) 28 ... Liquid level sensor 29 ... Power switch 32 ... Input port 33 ... Output port 34 ... Charger 35, 36, 37, 38 ... Feed line 42 ... Solenoid coil M ₁ , M ₂ ... Forward / reverse rotation contactor SW ₁ , SW ₂ ... Relay contact X ₁ ... Liquid Surface signal X ₂ ... Voltage signal Y ₁ , Y ₂ , Y ₃ ... Control signal

Claims (4)

[Scope of utility model registration request] 1. A water tank, a pump for pressurizing water stored in the water tank to supply the water to a battery through a supply pipe, and a motor for rotationally driving the pump.
The water remaining in the supply pipe when the end of replenishment water is detected by the connection part provided in the middle of the supply pipe, the liquid level sensor provided on the battery side, and the liquid level sensor Means for rotating the pump in the opposite direction by the motor so as to suck it back into the tank. 2. The automatic water replenishing device for a battery according to claim 1, wherein a charger is housed in the main body in addition to the automatic water replenishing device. 3. The automatic water refilling device for a battery according to claim 2, wherein a connecting portion of a power supply line extending from the charger toward the battery is integrated with the connecting portion for replenishing water. 4. The automatic water replenishing device for a battery according to claim 2, further comprising a control device for automatically recharging the water in succession.