JP4955219B2 - Battery fluid replenisher for battery-powered industrial vehicles - Google Patents

Description

  The present invention relates to a battery fluid replenishing device for a battery type industrial vehicle represented by a battery type forklift.

  Conventionally, there has been proposed a battery fluid replenishing device for a battery-type industrial vehicle that prevents excessive water replenishment caused by simultaneously replenishing battery fluid (purified water) at the time of charging the battery (referred to as replenishing water) (see Patent Document 1). .

This is because the water supply pump can be operated by an electric motor via a magnet switch and a timer switch when charging the battery, and the counter water switch is operated by a counter circuit so that the water supply pump does not operate continuously every time the battery is charged. The operation is thinned out at least once during charging. In addition, when either the water stop cock on the battery side is closed and the pressure of the water refilling circuit rises to the specified value or the water refilling time by the timer switch is satisfied, the water refilling operation is stopped. I am doing so.
JP 2003-272711 A

  However, in the configuration in which the water replenishment operation is stopped when either the pressure of the water replenishment circuit rises to a specified value or more or the water replenishment time by the water replenishment timer elapses as in the above-described conventional example, The water replenishment device does not stop due to a malfunction such as a stoppage of the water stoppage of the stopper or disconnection of the replenishment hose, and the water replenishment device will not stop until the specified time set by the water replenishment timer elapses. It is expected that the battery will continue to operate and overfilled with water.

  Then, this invention is made | formed in view of the said problem, and an object of this invention is to provide the battery liquid rehydration apparatus of the battery type industrial vehicle suitable for suppressing excessive water replenishment.

  The present invention is equipped with a battery as a power source for traveling or cargo handling work, and includes a water replenishing tank in which battery liquid is stored and an electric water replenishing pump, and automatically detects the liquid level of each battery cell. In a battery liquid rehydration device for a battery-type industrial vehicle in which a closing water faucet and a water replenishment tank are connected to each other via a water replenishment pump and a water replenishment circuit, a water replenishment starting means that enables the water replenishment pump to operate when charging the battery, During the water replenishment operation by the water replenishment start means, the water stop cock on the battery side is closed due to the rise of the liquid level, and the pressure of the water replenishment circuit rises to a specified value or more, or whether the set water replenishment timer time elapses When either one of the above is satisfied, the water replenishment stop means for stopping the water replenishment operation, and the initially set water replenishment timer time at the last several times of charging And a rehydration time calculating means for resetting changed according to definitive rehydration time.

  Therefore, in the present invention, the initially set water replenishment timer time is changed and reset according to the water replenishment time at the last several times of charging, so that the water replenishment circuit does not rise to the specified pressure, but over time. The water replenishment timer time to stop water replenishment can be shortened to the time required on the battery side, and excessive replenishment of battery fluid due to continued operation of the water replenishing device due to water stoppage failure of the water faucet can be suppressed. This prevents leakage of battery fluid to the outside. In addition, even if a faucet return failure occurs temporarily, the water faucet may return to its original state due to the movement of the vehicle once, further reducing the frequency of malfunctions.

  Hereinafter, a battery fluid rehydration device for a battery-type industrial vehicle of the present invention will be described based on an embodiment. FIG. 1 is a system configuration diagram showing a first embodiment of a battery fluid replenishing device for a battery-type industrial vehicle to which the present invention is applied.

  In FIG. 1, a battery fluid replenishing device for a battery-type industrial vehicle includes a water replenishing circuit 2 that supplies a water replenishing solution to a battery 1, a water replenishing start unit 3 that enables the water replenishing circuit 2 to operate during charging, and an operation of the water replenishing circuit 2. Water replenishing end means 4 for stopping the water supply.

  The water replenishing circuit 2 includes a water replenishing tank 10 that stores a water replenishing liquid (distilled water) to be supplied to the battery 1. The water replenishing liquid in the water replenishing tank 10 is sucked by the water replenishing pump 11 and the piping 12 and the battery 1 are not shown. It is automatically supplied to each cell of the battery 1 via a batch water replenisher. The water replenishing pump 11 is driven by the electric motor 13, sucks the water replenishing liquid in the water replenishing tank 10, and sends it out to the water replenishing device of the battery 1 through the pipe 12. Although not shown, the collective water replenishment device communicates with the water stop cock provided in each cell of the battery 1, for example, and when the water stop valve provided in the water stop cock opens in the cell due to insufficient battery fluid, Liquid is introduced into the cell.

  In addition, in the rehydration circuit 2, in order to prevent the replenishment liquid remaining in the collective replenishment apparatus from being supplied excessively into the cell, the pressure applied to the check valve 15 and the replenishment tank 10 is just in case. A drawing path 16 and a throttle 17 inserted in the pressure releasing path 16 are provided.

  That is, in the pipe 12 downstream of the water replenishment pump 11 of the water replenishment circuit 2, the backflow of the water replenisher from the water replenishment device to the water replenishment pump 11 is prevented, and the flow from the water replenishment pump 11 to the water replenishment device exceeds the predetermined pressure. An allowable check valve 15 is provided. The predetermined pressure is a valve opening pressure of the check valve 15, and the replenishing liquid naturally falls from the replenishing tank 10 to the battery 1 and flows out according to the installation height position of the replenishing tank 10 with respect to the installation height position of the battery 1. It is set as the grade which prevents.

  A pressure relief passage 16 communicating with the refill water tank 10 is opened downstream of the check valve 15, and a throttle 17 is inserted in the pressure relief passage 16. The depressurizing passage 16 and the throttle 17 set the return amount of the replenishing liquid supplied from the replenishing pump 11 via the check valve 15 to the replenishing tank 10. A replenisher amount obtained by subtracting the return amount to the replenisher tank 10 set by the throttle 17 from the supplied replenisher amount is supplied to the batch replenisher side. When the water replenishing pump 11 is stopped, the residual pressure in the batch water replenishing device partitioned through the check valve 15 is released to the water replenishing tank 10 through the throttle 17.

  In the water replenishment circuit 2 having the above-described configuration, even if the height position of the water replenishment tank 10 is higher than the height position of the battery 1, the water replenishment liquid is separated by the head between the water replenishment tank 10 and the battery 1. Can be prevented by the check valve 15. When the electric motor 13 is driven and the water replenishing pump 11 discharges the water replenishing solution, the valve is immediately opened, and the water replenishing fluid can be flowed to the collective water replenishing device side. Further, after the pressure switch 14 detects a high pressure and stops the water replenishment, the throttle 17 releases the residual pressure in the batch water replenishing device to the water replenishing tank 10. Since the residual water is removed from the water replenisher remaining inside the batch water replenisher, the water replenishment due to the residual pressure can be suppressed without pushing open the water stop valve of each cell.

  The rehydration start means 3 is closed when the charger 20 for the battery 1 is connected to an external commercial power source and the charging switch 21 attached to the charger 20 is pressed, and the closed state is self-maintained. The magnet switch 5 is provided. The magnet switch 5 is connected in series between the auxiliary battery 6 (or the main battery 1) and the electric motor 13. The magnet switch 5 is turned on when the charging switch 21 is pressed, a series-connected timer switch 7 described later is turned off, and is turned off when self-holding is released. The normal charging time is about 8 hours. The resistor 18 connected in series upstream of the electric motor 13 limits the current flowing through the electric motor 13. The charging control is programmed in an in-vehicle microcomputer.

  Although not shown in the figure, when the liquid level of the battery liquid is lowered from a preset height that has a margin with respect to the limit height, the battery 1 is in the charging mode and the normal mode of the industrial vehicle. In, warning of “Replenishment check” is displayed. As a result of the inspection, when it is determined that water replenishment to the battery 1 is necessary, the batch water replenishing device can be operated arbitrarily. For this reason, the magnet switch 5 can be manually turned on, and water can be replenished to each cell of the battery 1 by operating the magnet switch 5 without using the charger 20. Even in this case, the water replenishment is automatically stopped by the water replenishment ending means 4 described later.

  The water replenishing end means 4 includes an always-on timer switch 7 connected in series with the magnet switch 5, a pressure switch 14 for detecting the pressure of the water replenishing circuit 2 (detected pressure is about 15 KPa), and a water replenishment time. The timer switch 7 is turned off when any one of the signals at the time of detection of the detected pressure by the calculation means 8 and the pressure switch 14 and the time set by the water replenishment timer set by the water replenishment time calculation means 8 is input. Drive means 9 is provided. The pressure of the water replenishment circuit 2 rises when the water stop valve of each cell of the battery 1 is closed. When the pressure in the collective water replenishing device rises, the pressure switch 14 is operated to operate the drive circuit 9 and the timer switch 7 is turned off. The drive circuit 9 turns off the timer switch 7 by the operation signal of the pressure switch 14 and releases the self-holding state of the magnet switch 5. Therefore, even if the pressure drop of the water replenishment circuit 2 due to the stop of the water replenishment pump 11 is detected by the pressure switch 14 and the timer switch 7 returns to the on state, the electric motor 13 is not driven. The water replenishment time calculation means is programmed in an in-vehicle microcomputer.

  As shown in FIG. 2, the water replenishment time calculation means 8 includes a timer means 25 for counting the water replenishment time from the start of water replenishment at the time of charging, a set initial value and a margin value of the water replenishment timer value set by the setting means 26, and the latest Storage means 27 for storing the water replenishment time several times (for example, four times), the reason for stopping the water replenishment (whether by the pressure signal or the water replenishment timer value), and the water replenishment timer value (learned value) calculated by the arithmetic means 28 And a calculation means 28 for operating the drive means 9 when the elapsed time from the start of refilling exceeds the replenishment timer value. The setting means 26 is an adjustment screen for an in-vehicle meter, and can be used to input a refilling timer setting initial value and a margin value.

  The initial setting value of the water replenishment timer value stored in the storage means 27 is a timer value that is manually set by an operator using an adjustment menu of a setting means installed in a driver's seat or the like, and the operating status of the industrial vehicle The operator determines that the replenisher is sufficiently supplied to each cell of the battery 1 because the liquid level of each cell at the time of charging the battery varies in accordance with (for example, light load, normal, high load). Set to a value. The setting range can be, for example, in units of 1 to 20 minutes, and the initial setting value is, for example, 7 minutes.

  Further, the water replenishment timer value (learned value) calculated by the calculation means 28 and stored in the storage means 27 is used to stop the water replenishment to each cell of the battery 1 by the pressure switch 14 that detects the pressure increase in the water replenishment circuit 2. It is set to the time plus the extra time. The water replenishment time is set to 1 minute, and the second digit is rounded up to calculate the water replenishment timer value. For example, when the maximum value of the last four water replenishment times is 1 minute and 10 seconds, the base for the calculation of the next water replenishment timer value is 2 minutes, and when the maximum value of the last four water replenishment times is 30 seconds The base for calculating the next water replenishment timer value is 1 minute. The minimum unit of the rehydration time to be stored is, for example, 5 seconds. The margin time is also selected and set in increments of 1 minute, 2 minutes, 3 minutes, etc. by an operator manually input from the adjustment menu of the setting means 26 installed in the driver's seat or the like. .

  By the way, the water replenishment time in which the water replenishment to each cell of the battery 1 is stopped by the pressure switch 14 that detects the pressure rise of the water replenishment circuit 2 is the operating condition of the industrial vehicle at that time (for example, light load, normal, high load) Accordingly, the liquid level of each cell during battery charging varies. For this reason, a water replenishment timer value (learned value) obtained by adding a margin value of the water replenishment timer value to the water replenishment time during which water replenishment is stopped due to an increase in the pressure of the water replenishment circuit 2 is set by the computing means 28 and stored by the storage means 27. The That is, the problem that the liquid level in the battery 1 is not raised to the specified value by the replenishment timer time (learned value) can be solved by adding the margin time to the pressure rise time that varies from time to time.

  Further, the replenishment timer value (learned value) is changed from the initial set value by the operator to the timer value obtained by adding the replenishment time and the margin time by the pressure switch 14 according to the change in the replenishment time from time to time. Although it is changed, it is calculated so as not to exceed the initial set value by the operator.

  Further, the replenishment timer value (learning value) is calculated by the calculation means 28 in order to prevent the water replenishment timer value (learning value) from fluctuating each time depending on the operation status of the industrial vehicle (for example, light load, normal load, high load). The maximum value in the last four water replenishment times at the time of charging is selected, and a margin time is added to the timer value. However, when the water replenishment to the battery 1 is not stopped due to the pressure increase of the water replenishment circuit 2 but is stopped by exceeding the time set by the water replenishment timer value, the water replenishment circuit 2 reaches the specified pressure by the water replenishment timer value. It means that it did not rise. This is because the liquid level of each cell of the battery 1 at that time is not expected to reach the specified height, but the water stoppage of the water stop cock of each cell or the hose disconnection of the water refill circuit 2 has occurred. It can happen. For this reason, when the water replenishment to the battery 1 stops by exceeding the time set by the water replenishment timer value, when the water replenishment time becomes the maximum value in the last four water replenishment times, The water replenishment time itself is used as a water replenishment timer value (learning value) without adding a margin time.

  Further, when the rehydration timer setting initial value is changed by the adjustment menu which is the setting means 26 by the operator, the learning is restarted from the new rehydration timer setting initial value. When “no learning function” for the water replenishment timer value is selected in the adjustment menu as the setting means 26 by the operator, the learning function for the water replenishment timer value described above is not exhibited, and the water replenishment timer value is set to the water replenishment timer value. The initial value is maintained. In the diagnosis mode by the operator, it is desirable that the water replenishment timer value set by the learning function and the latest four water replenishment times can be confirmed.

  The operation of the battery liquid rehydration device of the battery-type industrial vehicle having the above configuration will be described. FIG. 3 is a calculation flowchart of the water replenishment time calculation means 28 executed at the time of charging by the in-vehicle computer, and will be described below with reference to FIG.

  According to the battery liquid replenishing device having the above configuration, when the charger 20 is connected to a commercial power supply via a power supply cable or a connector and the charging switch 21 of the charger 20 is turned on, charging of the battery 1 is started. At the same time, the magnet switch 5 constituting the water replenishment starting means 3 is turned on. Since the timer switch 7 is in the ON state, the electric motor 13 rotates to drive the refill water pump 11. The water replenisher in the water replenishing tank 10 is sucked into the water replenishing pump 11 and sent out to the batch water replenishing device of the battery 1 through the pipe 12. The collective water replenisher supplies the water replenisher to the cell in which the battery fluid of the battery 1 is lower than the specified value and the stop cock is opened.

  In step S1, the water replenishment time calculation means 28 reads the latest four last water replenishment times tn-4 to tn-1, the water replenishment timer setting initial value Y, and the margin setting value α, and proceeds to step S2.

  In step S2, the margin setting value α is added to the maximum water replenishment time in the latest four last water replenishment times, and the value X is calculated. In this case, the maximum value X is selected by adding the margin time α to each of the past four water replenishment times tn-4 to tn-1 and selecting the maximum value X of each added timer value. Also good. However, of the past four water replenishment times, other than the normal stop where the pressure switch 14 detected a pressure increase and the water supply was stopped, the water supply was stopped because the time set by the water replenishment timer value had elapsed without increasing the pressure. For the replenishment time that has been stopped, the margin setting value α is not added, and whether or not the value is the maximum value of the last four water replenishment times is determined by adding the margin setting value α to the other water replenishment times. A comparison is made.

  As described above, in this step S2, for the replenishment time in which the replenishment is stopped because the time set in the replenishment timer value has elapsed without the pressure rising in the last four last replenishment times, In principle, the margin setting value α is not added. However, after the water replenishment is stopped at the water replenishment timer value, the liquid level of the battery fluid in the battery 1 is lower than the preset level. When the warning lamp for “replenishment check” is lit, it can be clearly determined that the replenishment time is not sufficient to reach the required liquid level at the time set by the timer value.

  In such a case, at the next charging, the electric motor 13 is automatically driven to perform water replenishment to the collective water replenishment device via the pump 11 and the water replenishment circuit 2, and the stop cock is closed due to the rise of the liquid level. Until the liquid level of each cell of the battery 1 is raised to a specified value, the pressure switch 14 is actuated by the pressure increase in the water replenishment circuit 2 due to the closure of the stop cocks of all the cells, and the drive circuit 9 Thus, the timer switch 7 is turned off. In this case, the “replenishment check” alarm is turned off, and the replenishment stop can be normally stopped by the pressure switch 14 in a relatively short time.

  Therefore, in such a case, even if the replenishment time has been stopped abnormally because the time set by the replenishment timer value has elapsed without the pressure rising in the last four last replenishment times, In order to extend the time of the timer value, add the margin setting value α, and compare the size of the other normal stop watering times with the margin setting value α to find the maximum value X To do.

  In step S3, it is determined whether or not the maximum value X calculated in step S2 exceeds the replenishment timer setting initial value Y. If not, the process proceeds to step S4. If it exceeds, the process proceeds to step S5. Proceed to

  In step S4, the water replenishment timer value is set to the maximum value X, and in step S5, the water replenishment timer value is set to Y, and the process at the time of charging is terminated. The set water replenishment timer value is applied from the next charging.

  As described above, when water supply is supplied to the batch water supply device via the water supply circuit 2, the water stop cock is closed when the water supply level is supplied to the cell and the liquid level reaches a specified value. In all the cells, when the battery liquid reaches a specified level and all the stop cocks are closed, the internal pressure of the pipe 12 between the water replenishing pumps 11 suddenly rises from within the collective water replenishing device. The increase in the internal pressure is detected by the pressure switch 14 and is input to the drive circuit 9 of the water replenishment ending means 4, and the drive circuit 9 turns off the timer switch 7. When the timer switch 7 is turned off, the electric motor 13 stops rotating. When the replenishing pump 11 is stopped, the supply of the replenishing liquid is stopped. The magnet switch 5 is released from the self-holding state of the on operation and switched to the off operation.

  FIG. 4 is an explanatory diagram showing a change state of the water replenishment timer value for each charging time. When charging from time 1 to time 4 when the set initial value of the water replenishment timer is newly set (9 minutes), the memory of the last four water replenishment times is released and the last four water replenishment times are stored. Therefore, the water replenishment timer value is maintained at the set initial value (9 minutes).

  Since the last four water replenishment times have been stored since the charge at time 5, the water replenishment timer that adds a margin set value (2 minutes) to the maximum value (4 minutes) of the last four water replenishment times A value (learned value, 6 minutes) is set. During charging from time 6 to time 15, since the industrial vehicle was operated with a relatively light load, the consumption (evaporation) of the battery liquid was relatively suppressed, the stop cock was closed, and the pressure increase in the water replenishment circuit 2 was compared. As the water replenishment time becomes shorter, the water replenishment timer value (learning value) is also shortened from 5 minutes to 4 minutes to 3 minutes.

  At the time of charging at time 16, rehydration stop is executed based on the water replenishment timer value (3 minutes). When charging is completed, a warning of “water replenishment check” is given. The warning of “Replenishment check” is given when charging is completed. This means that each cell of the battery 1 has not been sufficiently refilled because it has been stopped by the refill timer. At the time of the next charging (time 18), the warning of “replenishment check” is also extinguished, the pressure is increased by a relatively short time of replenishment of 2 minutes, and the replenishment stop is switched to the normal stop. For this reason, even if the maximum value of the last four water replenishment times depends on the water replenishment timer value, the margin setting value α is added by the exception process in step S2, and the water replenishment timer value is extended from 3 minutes to 5 minutes. Yes.

  At the time of charging at the time 21 and the time 23, the water replenishment timer value is extended from 5 minutes to 7 minutes and from 7 minutes to 9 minutes for the same reason. Thus, when it is necessary to extend the water replenishment timer value, this is often the case when the operating state of the industrial vehicle becomes a high load and the consumption of the battery liquid is large.

  In addition, from time 23 to time 28, the time of the water replenishment stop due to the pressure increase is 10 minutes, which is obtained by adding the margin setting time to the last four water replenishment times. Since the setting initial value (9 minutes) is exceeded, the setting timer value is held at the setting initial value.

  In addition, at the time of charging at time 36, the setting unit 26 newly sets the replenishment timer setting initial value (5 minutes), the memory of the replenishment time so far is released, and learning of the replenishment timer value is restarted. . At the time of charging from time 37 to time 39, since the memory of the last four water replenishment times is not accumulated, the water replenishment timer value is maintained at the set initial value (9 minutes). The learning value of the water replenishment time is reflected in the water replenishment timer value.

  In the above embodiment, as a method for calculating the water replenishment timer value, a method for referring to the maximum value of the latest past several times (four times) of water replenishment time has been described. The average value of the water replenishment time may be referred to, or the tendency of the last several water replenishment times may be taken into account. In addition, as the latest past water replenishment time to be referred to, what has been referred to the last four water replenishment times has been described, but although not illustrated, it refers to the past two to five water replenishment times. May be.

  Further, in the above embodiment, as a method for calculating the water replenishment timer value, the method of adding the margin time to the maximum value of the last several times (four times) of the water replenishment time has been described. The replenishment timer value may be used without adding time.

  In the present embodiment, the following effects can be achieved.

  (A) During the water replenishment operation by the water replenishment start means 3 that enables the water replenishment pump 11 to operate when the battery 1 is charged and the water refill operation by the water replenishment start means 3, the water stop cock on the battery 1 side is closed by the rise of the liquid level. The rehydration stop means 4 for stopping the replenishment operation when either the pressure of the replenishment circuit 2 rises to a specified value or more or the set replenishment timer time elapses, and the initial stage Since the water replenishment timer 2 is changed according to the water replenishment time at the last several times of charging and is set again, the water replenishment circuit 2 does not rise to the specified pressure so that time elapses. The water replenishment timer time for stopping water replenishment can be shortened to the time required on the battery 1 side, and the battery can be maintained by the water replenishment device continuing to operate due to a water stoppage failure of the water faucet. Can suppress excessive supply of the liquid can be prevented from leaking to the outside of the battery fluid associated therewith. In addition, even if a faucet return failure occurs temporarily, the water faucet may return to its original state due to the movement of the vehicle once, further reducing the frequency of malfunctions.

  (A) The water replenishment time calculation means 8 changes and resets the set water replenishment timer time according to the average value or the maximum value of the water replenishment time at the last several times of charging. It is possible to set a water replenishment timer time according to the consumption level of the battery fluid corresponding to the operating status of the type industrial vehicle, so that extra water replenishment can be reduced and leakage to the outside due to excessive water supplementation can be suppressed.

  (C) The water replenishment time calculation means 8 adds the preset margin time to the calculated water replenishment timer time and resets the water replenishment timer time. Therefore, the operation status of the industrial vehicle at that time (for example, light load, normal In response to the high load), the liquid level of each cell at the time of charging of the battery 1 fluctuates each time, so that the problem that the battery liquid is not replenished to the specified value within the replenishment timer time is solved. .

  (D) The replenishment time calculation means 8 does not add the margin time to the replenishment time when the replenishment timer time of the most recent past replenishment times referred to at the time of the calculation has elapsed. Therefore, it is possible to prevent excessive water supplementation by extending the water supplement timer time.

  (E) When the water replenishment timer time elapses and the water replenishment is stopped and the battery liquid level of the battery 1 is less than the specified value, the water replenishment time calculation means 8 adds a margin time to the water replenishment timer time. Since the timer time is reset, the shortage of water replenishment due to the water replenishment timer time being too short can be solved.

  (F) The water replenishment time calculation means 8 determines that the water replenishment timer time that is initially set when the water replenishment timer time obtained by adding a preset margin time to the calculated water replenishment timer time exceeds the water replenishment timer time that is initially set. Is set as the water replenishment timer time, it is possible to prevent the water replenishment timer time from being extended beyond the set initial value, and to prevent excessive water replenishment unintended by the operator.

  (G) When the newly set water replenishment timer time is newly changed and set, the water replenishment time calculation means 8 releases the memory of the past water replenishment time and newly obtains the last several water replenishment times. In order to change and re-set the water replenishment timer time set from the time of charging at the specified time, set the water replenishment timer time according to the operating status of the industrial vehicle at that time (for example, light load, normal, high load) Can do.

  In the above-described embodiment, the water is replenished each time it is charged. However, although not shown, for example, for each of a plurality of times of charging, which is the technical content described in JP-A-2003-272711. One rehydration operation may be started. That is, when charging is performed at the end of daily work, such as a battery-type forklift, for example, a water refilling operation may be started at the time of charging once every three days. This replenishment time schedule is stored in the storage means 27 of the replenishment time calculation means 8. In this way, it is possible to further reduce over-replenishment by replenishing every other day.

BRIEF DESCRIPTION OF THE DRAWINGS The system block diagram of the battery liquid rehydration apparatus of the battery type industrial vehicle which shows one Embodiment of this invention. The schematic block diagram of a water replenishment time calculating means and a drive means similarly. The calculation flowchart of a water replenishment time calculation means. Explanatory drawing which shows the change state of the water replenishment timer value for every charge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery 2 Water replenishment circuit 3 Water replenishment start means 4 Water replenishment end means 5 Magnet switch 6 Auxiliary battery 7 Timer switch 8 Water replenishment time calculation means 9 Drive circuit 10 Water replenishment tank 11 Water replenishment pump 12 Piping 13 Electric motor 14 Pressure switch 20 Charger 21 Charge switch

Claims (8)

A water stop cock equipped with a battery as a power source for traveling or cargo handling work, equipped with a water replenishment tank that stores battery fluid and an electric water replenishment pump, and automatically closes by detecting the liquid level of each battery cell A battery-type water replenishment device for a battery-powered industrial vehicle in which a water supply tank and a water supply tank are connected to each other via a water supply pump and a water supply circuit.
Water replenishment start means for enabling operation of a water replenishment pump when charging the battery;
During the water replenishment operation by the water replenishment start means, the water stop cock on the battery side is closed due to the rise of the liquid level, and the pressure of the water replenishment circuit rises to a specified value or more, or whether the set water replenishment timer time elapses A water replenishment stop means for stopping the water replenishment operation when either of the conditions is satisfied;
A battery rehydration device for a battery-type industrial vehicle, comprising: a water replenishment time calculating means for changing and resetting the initially set water replenishment timer time according to the water replenishment time at the last several times of charging. .   2. The battery type according to claim 1, wherein the water replenishment time calculation means changes and resets the set water replenishment timer time according to an average value of water replenishment times during the last several times of charging. Battery fluid replenisher for industrial vehicles.   2. The battery type according to claim 1, wherein the water replenishment time calculation means changes and resets the set water replenishment timer time according to a maximum value of water replenishment time at the last several times of charging. Battery fluid replenisher for industrial vehicles.   The said water replenishment time calculation means adds the margin time set beforehand to the calculated water replenishment timer time, and resets the water replenishment timer time, It is any one of Claim 1 to 2 characterized by the above-mentioned. Battery fluid replenisher for battery-powered industrial vehicles. The water replenishment time calculation means does not add the margin time to the water replenishment time that has been replenished and stopped after the water replenishment timer time of the last several water replenishment times that have been referred to at the time of calculation. The battery fluid rehydration device for battery-powered industrial vehicles according to claim 4 .   When the water replenishment timer time elapses and the water replenishment is stopped and the battery level of the battery is less than the specified value, the water replenishment time calculating means adds a margin time to the water replenishment timer time and re-adds the water replenishment timer time. The battery fluid replenishing device for a battery-type industrial vehicle according to claim 5, wherein the device is set. When the water replenishment timer time obtained by adding a preliminarily set margin time to the calculated water replenishment timer time exceeds the initial water replenishment timer time, the water replenishment timer time is set to the water replenishment timer time. It sets as time, The battery liquid rehydration apparatus of the battery type industrial vehicle as described in any one of Claims 4-6 characterized by the above-mentioned.   When the initially set water replenishment timer time is newly changed and set, the water replenishment time calculating means releases the memory of the past water replenishment time, and when the latest several times of water replenishment times in the past are newly obtained. The battery rehydration device for a battery-type industrial vehicle according to any one of claims 1 to 7, wherein the water replenishment timer time set from the time of charging is changed and reset.

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