JPH01194801A - Battery liquid level detector/indicator of electric vehicle - Google Patents

Abstract

PURPOSE:To protect components or joint members in a circuit from being broken, by providing lock members to a battery hood and a battery case, then jointing a sensor through the lock members to an indicating section. CONSTITUTION:An instrument panel mounting a liquid level alarm lamp and the like is provided in a protector case C arranged in the cabin 2 of a vehicle 1. A battery case 11 is arranged in a recess 100 made in the frame F, and a driver seat 13 is secured onto a battery hood 12 for closing an upper opening. A battery liquid level sensor 14 is arranged in the battery case 11 with signal lines thereof being connected to a stop member 16 of battery case 11. Wiring to the liquid level alarm lamp is connected to a hook member 15 of the battery hood 12, and a liquid level alarm 9 is connected electrically to the liquid level sensor when the hook member 15 is engaged with the stop member 16 through a steering wheel section 32.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a battery liquid level detection and display device for an electric vehicle.

(Prior Art) Generally, electric vehicles that use batteries as a driving source, such as Panteri forks and battery vehicles, operate with a large number of batteries, and as the batteries continue to discharge, the battery voltage reaches a state close to completely discharged. Perform charging work when This charging is performed frequently, and the battery fluid used repeatedly for charging and discharging is rapidly consumed.

Therefore, it is necessary to constantly monitor the amount of Pantheli fluid in the Pantheli case and replenish water when the remaining amount becomes low.

An example of a device for monitoring the remaining amount of battery fluid described above is disclosed in Japanese Patent Laid-Open No. 57-205224. This device has a battery case 50 as shown in FIG.
Inside, a liquid level sensor 5 detects the amount of liquid.
1 is connected to the battery case 50, a display meter 52 provided on the instrument panel is connected to the frame F of the vehicle that is in contact with the bottom surface of the battery case 50, and the detection result of the liquid level sensor 51 is displayed on the display meter 52. This is what is displayed on the page.

Furthermore, as shown in FIG. 7, the device disclosed in Japanese Utility Model Application No. 62-173158 has a gate-shaped bar 55 protruding from the pantel stopper 54, and the connection is wound around the bar 55. Connect the harness 57 of the terminal 56 to a display section (not shown), and connect the harness 61 of the connecting terminal (not shown) provided to the horizontal U-shaped locking member 59 provided on the battery hood 58 to the liquid inside the battery case 63. It is connected to a surface sensor. Then, with the battery 62 held by the stopper 54 so that it cannot be removed from the case 63, the locking portion 5
By holding the bar 55 at 9 and bringing the reconnection terminal 56 into contact with it, the liquid level sensor and the display section are energized, and the detection result of the liquid level sensor is displayed on the display section.

(Problem B to be solved by the invention) However, in the former of the above two devices, the bottom surface of the battery case 50 and the frame F opposite thereto are
do not form planes that align with each other, and both 50. Dust may accumulate in the gap between F. Further, on the bottom surface of the battery case 50 and the frame F, electrical contact resistance increases due to rust, paint, etc., and this may adversely affect signal transfer, leading to malfunction of the display meter 52.

In addition, battery fluid may leak from the Pantheli case 50, and this leaked Pantheli fluid may cause the high voltage of the battery to leak into the frame F and enter the signal circuit of the sensor 51, causing malfunction of the display meter 52. , there is a risk of damaging elements in the circuit.

In addition, in the latter case, a bar 55 and a locking member 59 are provided for the battery stopper 54 and the battery hood 58, respectively, in order to configure the signal circuit of the sensor, which is complicated to manufacture.

Furthermore, it is necessary to accurately match the positions of the connecting terminals 56 of the bar 55 and the connecting terminals of the locking part 59, and if there is a slight deviation in positional accuracy, a contact failure will occur, making it impossible to accurately display the remaining amount of battery fluid. Not only is this not possible, but there is a risk that they may be damaged when attaching and detaching both 55 and 56.

This invention was made to solve the above-mentioned problems, and its purpose is to accurately display the remaining amount of battery fluid, facilitate manufacturing, and prevent damage to elements and connecting members in the circuit. It is an object of the present invention to provide a battery fluid detection and display device for an electric vehicle that can be used safely without any damage.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention has a battery case and a battery hood supported on the battery case so as to be openable and closable, and also has a sensor for detecting the amount of bufftery liquid in the battery case. and a display member that displays the detection results of the sensor, the battery case and the battery hood include a device for locking and unlocking the battery hood by engaging and disengaging each other when the battery hood is closed. The connecting terminal wired to the sensor is connected to the locking member on the panteli case side, and the connecting terminal wired to the display member is connected to the locking member on the battery hood side. .

(Function) By employing the above-described means, the present invention has the following advantages: - When the battery hood is closed and locked by the side locking members, the reconnection terminal is connected via these locking members; The sensor and the display section are connected, and a display can be performed according to the amount of battery fluid.

(Example) Hereinafter, a first example of the present invention will be described in detail with reference to FIGS. 1 to 4.

In FIG. 1, a steering wheel 3 and various cargo handling levers 4 are provided in a driver's cab 2 of a forklift vehicle 1, and the running direction of the vehicle 1 is selected by operating the steering wheel 3, and the cargo handling lever 4 is operated. As a result, the fork 5 attached to the front (left side) of the vehicle 1 is raised and lowered.

In addition, a protector case C in which a wiring board etc. are housed is installed in the front part of the driver's cab 2, and a second
An instrument panel 6 as shown in the figure is provided. The instrument panel 6 is provided with a battery capacity meter 7, an overdischarge warning light 8, a dispersion liquid level warning light 9 as a display member, and various switches SW.

Furthermore, as shown in FIG.
A battery foot 1 is arranged and closes the upper opening of the battery foot 1.
A driver's seat 13 is fixedly installed above the vehicle.

A large number of battery packs are housed in the battery case 11, and these discharge as the vehicle 1 travels, cargo handling work, etc., and the capacity of the battery is measured by monitoring the battery voltage. It is displayed on the tomb total 7.

Also, as the battery is charged and discharged, the battery fluid decreases and becomes less than a predetermined value (if this occurs, the fluid level sensor 14
According to the signal from the liquid level sensor 14, the liquid level warning light 9 lights up to display a warning.

A hooking member 15 as a locking member is fixed to the front surface of the battery hood 12, and a locking member 16 as a locking member is fixed to the front surface of the battery case 11, respectively. The retaining member 16 is retained by the retaining member 15 in the locked position, and the battery hood 12 in the closed state is locked so that it cannot be opened. These hanging members 15 and anchoring members 16 will be explained in detail.

First, the hanging member 15 will be explained. As shown in FIG.
A hanging member 15 made of a conductive material is placed in front of the hanging member 15 through an insulating material 17, and a bolt 2 made of a conductive material is installed in front of the hanging member 15 with a washer 19 interposed therebetween.
0 is placed. Further, a harness 21 connected to the liquid level warning light 9 is routed inside the battery hood 12, led forward along the upper back surface of the battery hood 12, and then suspended downward. A terminal 22 as a connection terminal attached to the back surface of the front wall of the battery hood 12 and the lower end of the harness 21 is opposed to each other via an insulating material 23 and a washer 24, and further behind the connection terminal 22 is a washer 25 and a spring washer. A nut 27 is disposed through 26.

The hanging member 15, each insulating material 17.23, each washer 1
9, 24, 25, the spring washer 26, and the terminal 22 are each provided with a through hole on the same horizontal line as the insertion hole 28 of the battery hood 12. The hooking member 15 is fixed to the battery hood 12 by tightening the fitting protruding rearward through the through hole and the insertion hole 28 with a slot 27 screwed onto the protruding end of the bolt 20. Therefore, the latching member 15 is connected via the bolt 20 to the terminal 22 and, in turn, to the liquid level warning light 9.

Next, the engaging member 16 will be explained. As shown in FIG. 4, a pair of upper and lower insertion holes 29a and 29b are provided in the front wall of the battery case II, and a pair of through holes that align with the insertion holes 29a and 29b are provided at the front of the battery case 11. An attachment member 16 made of a conductive material is inserted through an insulating material 30.
is located.

This fastening member 16 is attached by rotatably supporting a handle portion 32 on a bracket 31, and further fixing an oval annular catching portion 33 extending upward to the handle portion 32. The capturing section 33 is configured to move up and down by the rotation operation. For attachment, the pair of upper and lower through holes provided on the rear surface of the bracket 31 are aligned with the through holes of the insulating material 30, respectively.

A pair of upper and lower washers 34a are provided in front of the engaging member 16.
A pair of bolts 3 made of conductive material are attached via , 34b.
5a and 35b are respectively arranged, and the upper washer 34
a, bolt 35a, lower washer 34b and pole l
-35b is mounted on the same horizontal line as each through hole of the bracket 31.

Further, in the battery case 11 , a terminal 37 as a connection terminal is attached to one end of the harness 36 connected to the liquid level sensor 14 .
An insulating material 38a and a washer 39a are interposed between the inner surface of the front wall of the terminal 37 and the terminal 37. Said terminal 3
7 and! ! ! Each edge member 38a has a through hole at a position corresponding to the upper insertion hole 29a, and a nut 42a is disposed behind the through hole through a washer 40 and a spring washer 413 on the same horizontal line as the upper insertion hole 29a. has been done.

Also, an insulating material 38b having a through hole corresponding to the lower insertion hole 29b of the pantry case 11, and a washer 39b having the same center line as the insertion hole 29b and the through hole.
, a spring washer 41b, and a spring washer 42b are arranged in line toward the rear.

The attachment member 16, which protrudes rearward through the insertion hole 29a and the corresponding group of through-holes, is tightened with a nut 42a screwed onto the protruding end of the bolt 35a, so that the attachment member 16 is attached to the pantel case 11. and a terminal 37 are fixed, and the engaging member 16 is connected to the terminal 37 and, in turn, to the liquid level sensor 14 via a bolt 35a. Also, the through holes and insertion holes 29b of each member
The engagement member 16 is fixed to the panty case 11 by being tightened with a nut 42b.

The catching part 33 of the engaging member 16 is moved up and down by operating the handle part 32 to be engaged with and disengaged from the hooking member 15, and is switched between a locked position and an unlocked position. When the locking member 16 is in the lock position, it holds the battery hood I2 against the battery case 11 in such a way that it cannot be opened. The sensor 14 and the liquid level warning light 9 are electrically connected. When the liquid level sensor 14 detects a shortage of battery liquid, the liquid level warning light 9 lights up.
This is displayed to call the driver's attention.

In the embodiment described above, the well-known hanging member 15 and engagement member 16 that lock the battery hood 12 to the battery case 11 are used as connectors for the harnesses 21 and 37 of the liquid level sensor 14 and the liquid level warning light 9. As a result, there is no need to provide a separate component as a connector, and only the positional accuracy of the locking mechanism that is normally required is required, which avoids the complexity of special precision work during manufacturing and eliminates manufacturing errors. For this reason, both members 15 and 16 will not be damaged even if there is a slight deviation in positional accuracy.

Furthermore, the hanging member 15 and the anchoring member 16 are made of an insulating material 17.2.
3 and 30. 38a and 38b are insulated from the battery hood 12 and the battery case 11, respectively, so that the high voltage of the battery will not leak to the battery case 11 or the battery hood 12.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the terminal 37 of the harness 36 of the liquid level sensor 14 is attached to the upper end of a push spring 44 provided on the upper end surface of the battery case 11 via an insulating material 43, and the push spring 44 is connected to four regulating pieces. 45 (only two shown). And, facing this, the battery hood 12
A terminal 22 of the harness 21 is provided with a boss portion 47 projecting from the lower end surface of the harness 21 via an insulating material 46, and is connected to the liquid level warning light 9.
is attached to the lower end of the boss portion 47. As the battery hood 12 is opened and closed, one terminal 22 is brought into contact with and separated from the other terminal 37, thereby connecting and disconnecting the liquid level sensor 14 and the liquid level warning light 9.

In the above configuration, when the terminal 22 contacts the terminal 37 when the battery hood 12 is closed, the push spring 44 is contracted by the pressure of the boss portion 47;
Since the displacement of the pushing spring 44 in the horizontal direction is restricted by the regulating piece 45, there is no deviation in the position between the two terminals 22, 37, and the two terminals 22, 37 are in accurate contact.
No false signal is output to the liquid level warning light 9.

It should be noted that the present invention is not limited to the above-described embodiments, and any changes may be made without departing from the spirit of the invention, such as application to various electric vehicles other than forklifts.

Effects of the Invention As detailed above, according to the present invention, it is possible to accurately display the remaining amount of battery fluid, and it is possible to easily manufacture and safely prevent elements and connecting members in the circuit from being damaged. It exhibits excellent effects when used.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a side view showing the entire two-crit, and FIG.
Figure 3 is a plan view showing the instrument panel, Figure 3 is an exploded side sectional view showing the hooking member, Figure 4 is an exploded side sectional view showing the locking member, and Figure 5 is the second embodiment. The side view, FIG. 6, and FIG. 7 are an explanatory view and a perspective view, respectively, showing the conventional device. Battery level warning light 9 as a display member, battery case 11, battery hood 12, liquid level sensor 14, terminals 22, 37 as connection terminals, latch member 15 and locking member 16 as locking members Patent applicant Toyoda Automatic Loom Works Co., Ltd. Representative Patent Attorney On 1) Hiroshi Senmon

Claims (1)

[Claims] 1. It has a battery case and a battery hood supported by the battery case so as to be openable and closable, and also includes a sensor that detects the amount of battery fluid in the battery case, and a display member that displays the detection results of the sensor. In the electric vehicle, the battery case and the battery hood are each provided with a locking member that is connected to and disconnected from each other when the battery hood is closed to lock and unlock the battery hood, and the locking member is connected to a sensor. A battery liquid level detection and display device for an electric vehicle, in which a connecting terminal is connected to a locking member on the battery case side, and a connecting terminal connected to a display member is connected to a locking member on the battery hood side.