JP3669484B2 - Battery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery.
[0002]
[Prior art]
In general, a projecting shaft is projected on the upper surface of an automobile battery as a plus electrode and a minus electrode, and a circular hole of a terminal connected to the battery cord is fitted into the projecting shaft, and this is connected by tightening with a nut or the like. Has been done.
[0003]
[Problems to be solved by the invention]
However, even if the correspondence between the terminal and the projecting shaft is incorrect, the conventional structure can be connected to the electrode on either side, so it is expected that the connection work will be performed with the incorrect correspondence. The In the conventional battery, since the projecting shaft constitutes the electrode itself, if the terminal touches the unsupported projecting shaft, a short circuit may occur.
An object of the present invention is to provide a battery that can prevent a short circuit or the like even if a terminal is incorrectly assembled to an electrode portion.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a shaft member for connecting a corresponding terminal to each of the negative electrode portion and the positive electrode portion is formed on the surface of each electrode portion. In the case where both the terminal and the electrode part are connected to the shaft member only when they are in a normal correspondence relationship and are in an incorrect correspondence relationship. Is a battery provided with identification means for disabling connection to any shaft member, the shaft member is provided with an insulating means for maintaining insulation from the electrode portion, and When the terminal is connected to the shaft member, the terminal can be contacted around the shaft member of the conduction surface.
According to a second aspect of the present invention, in the first aspect, the shaft member includes a connecting shaft connected to the terminal and a large-diameter head provided at one end of the connecting shaft and embedded in the conductive surface. And the head is coated with an insulating film.
Furthermore, a third aspect of the invention is characterized in that, in the first or second aspect, the shaft member is integrally formed of an insulating material.
[0005]
Operation and effect of the invention
According to the first aspect of the present invention, when the correspondence between the terminal and the shaft member in the electrode portion is wrong, the erroneous connection is prevented by the identification means. However, when such an erroneous connection is to be made, the shaft member and the terminal may come into contact with each other. However, since the shaft member and the electrode portion are insulated by the insulating means, the terminal and the shaft There is no short circuit between the members.
According to the invention of claim 2, since the head portion of the shaft member is coated with the insulating film, the shaft member is insulated from the electrode portion, and a terminal having an incorrect correspondence touches the tip of the shaft member. There is no short circuit.
According to the invention of claim 3, since the shaft member is integrally formed of the insulating material, the insulating property is surely maintained as compared with the case where partial insulation treatment is performed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<Embodiment 1>
1 to 5 show Embodiment 1 of the present invention. In FIG. 1, B is a battery for 42V mounted in a motor vehicle, and the outer surface is covered with a cover 30 made of synthetic resin. Fitting portions 10a and 10b are recessed in the left and right corner portions of the battery, and a plus side electrode portion 11a and a minus side electrode portion 11b are disposed on the bottom surface thereof.
[0007]
Both electrode portions 11a and 11b are each constituted by a lead electrode, and the upper end surfaces of each of the electrode portions 11a and 11b are exposed in a circular shape on the surfaces of both fitting portions 10a and 10b to form a conductive surface 31. In addition, screw shafts 13a and 13b (shaft members) are erected and concentrically provided at portions where the electrode portions 11a and 11b are exposed. The screw shafts 13a and 13b are formed on one end of the shaft portions 13a1 and 13b1 and the coaxial portions 13a1 and 13b1 which are formed with screws on the peripheral surfaces and shorter than the depth of the fitting portions 10a and 10b. The heads 13a2 and 13b2 have a diameter. Further, in this embodiment, the heads 13a2, 13b2 of the screw shafts 13a, 13b are coated with an insulating film 32 made of synthetic resin or the like, and more specifically, the entire surface including the front and back of the heads 13a2, 13b2 is coated. . The screw shafts 13a and 13b are integrated with each other by insert molding together with the electrode portions 11a and 11b. In the state thus formed, as shown in FIG. 5, the head portions 13a2 and 13b2 coated with the resin are exposed to the conductive surfaces 31 of the electrode portions 11a and 11b in a substantially flush state.
On the other hand, the recessed portions 14a and 14b for identification are provided on the side wall surfaces of the respective fitting portions 10a and 10b, and these are inwardly facing each other so as to be arranged symmetrically in the both fitting portions 10a and 10b. A dent is formed toward.
[0008]
Terminals 15a and 15b connected to both electrode portions 11a and 11b via both screw shafts 13a and 13b are formed of a conductive metal material, and a rear end portion has a barrel portion 16 and a battery cord C Connected by caulking. The front end portions of the terminals 15a and 15b are a substrate 17 bent at a substantially right angle from the barrel portion 16, and an insertion hole 20 that can be inserted into both screw shafts 13a and 13b passes through the center thereof. The substrate 17 is formed in a symmetrical shape at the left and right terminals 15a and 15b. In other words, symmetrical identification pieces 17a and 17b project from the side edges of the substrate 17 at both terminals 15a and 15b. Both identification pieces 17a and 17b are set to be wider than the width of the identification concave portions 14a and 14b, and the terminals 15a and 15b and the electrode portions 11a and 11b are to be assembled from above due to excessive correspondence. In this case, as shown in FIG. 4, the identification pieces 17a and 17b and the identification recesses 14a and 14b interfere with each other so that the terminals 15a and 15b cannot be assembled.
[0009]
Further, rotation prevention pieces 18a and 18b are formed on the side edges of the substrate 17 opposite to the identification pieces 17a and 17b, respectively. When the nuts 19 are tightened and fixed to the screw shafts 13a and 13b, they are fixed. , Serves as a detent for the entire terminal. The detent pieces 18a and 18b are formed to be narrower than the identification pieces 17a and 17b, and can be fitted into the identification recesses 14a and 14b when the terminals 15a and 15b and the electrode portions 11a and 11b are in a normal correspondence relationship. It has become. Further, in the rotation preventing pieces 18a and 18b, contact pieces 21a and 21b are formed by bending upward on the side edges facing the rotation direction of the terminals 15a and 15b when the nut 19 is tightened. The contact area of the recesses 14a and 14b with the wall surface is increased.
[0010]
The first embodiment is configured as described above. When the terminals 15a and 15b and the electrode portions 11a and 11b are in a normal correspondence relationship, the detent pieces 18a and 18b of the terminals 15a and 15b are The fitting is fitted in the corresponding identification recesses 14a and 14b. Then, the screw shafts 13 a and 13 b are inserted into the insertion holes 20 so that the barrel portions 16 of the terminals 15 a and 15 b and the battery cord C are in a state along the side surface of the battery B. If the nut 19 is tightened with respect to the screw shafts 13a and 13b13 in this state, the connection of the terminals 15a and 15b is completed. However, at the end of the tightening, the terminals 15a and 15b try to rotate in the clockwise direction in the figure, but the contact pieces 21a and 21b of the rotation stopper pieces 18a and 18b contact the opposing wall surfaces of the identification recesses 14a and 14b. Therefore, the nut 19 can be tightened smoothly.
When the terminals 15a and 15b are tightened with respect to the screw shafts 13a and 13b, the terminals 15a and 15b are in addition to the insulating coating 32 applied to the back surfaces of the heads 13a2 and 13b2 of the screw shafts 13a and 13b. Since the contact surface 31 of 11b also contacts, regular conduction with both electrode parts 11a and 11b of the battery B is taken here.
[0011]
When the terminals 15a and 15b and the electrode portions 11a and 11b are in a corresponding relationship, when the terminals 15a and 15b are approached from above the electrode portions 11a and 11b, as shown in FIG. 17b interferes with the opening edges of the identification recesses 14a and 14b, and the terminals 15a and 15b cannot be accommodated in the fitting portions 10a and 10b. Thus, the operator knows that the terminals 15a and 15b and the electrode portions 11a and 11b have a corresponding relationship.
[0012]
When the terminals 15a and 15b approach from above in the axial direction of the screw shafts 13a and 13b in the case of such an incorrect correspondence, the screw shafts 13a and 13b are lower than the fitting portions 10a and 10b. Since it is set, it interferes with the fitting portions 10a and 10b before contacting the terminals 15a and 15b. For example, when the terminals 15a and 15b approach from an oblique direction, the screw shafts 13a and 13b It can be in contact.
Even in such a case, since the screw shafts 13a and 13b are insulated from the electrode portions 11a and 11b by the insulating film 32 coated on the heads 13a2 and 13b2, they have an erroneous correspondence relationship unlike the conventional case. Contacting the terminals does not cause a short circuit.
[0013]
As described above, according to the first embodiment, when the correspondence between the terminals 15a and 15B and the electrode portions 11a and 11b is incorrect, the identification pieces 17a and 17b interfere with the upper surface of the battery B. 15b does not reach the conductive surface 31 and cause a short circuit. Furthermore, since the screw shafts 13a and 13b are insulated from the electrode portions 11a and 11b by the insulating coating 32, the terminals 15a and 15b having an incorrect correspondence may touch the screw shafts 13a and 13b. It ’s never short-circuited.
[0014]
Moreover, since the battery B of this embodiment has taken a peculiar form which formed the fitting parts 10a and 10b around the electrode parts 11a and 11b, it contributes also to identification with the conventional 12 volt battery. Furthermore, since the fitting portions 10a and 10b have such a depth that the screw shafts 13a and 13b of the electrode portions 11a and 11b do not protrude from the upper surface of the battery, a situation where the screw shafts 13a and 13b are inadvertently touched by a tool or the like. The effect that it can avoid is also acquired.
[0015]
<Embodiment 2>
FIG. 6 shows Embodiment 2 of the present invention. In the second embodiment, the entire screw shafts 13a and 13b are integrally formed in advance with an insulating material such as ceramic. Moreover, the screw | thread screwed with a nut is engraved on the outer peripheral surface of axial part 13a1, 13b1 of screw shaft 13a, 13b. And like the first embodiment, the electrode portion is integrated during insert molding of the electrode portion.
Other configurations are the same as those of the first embodiment, and the same effects are obtained. However, since the screw shafts 13a and 13b in the second embodiment are entirely formed of an insulating material, the insulation is better than that in the first embodiment, which is partially covered and insulated. Certainty.
[0016]
<Other embodiments>
The identification means for preventing the erroneous assembly of the terminal and the electrode part should not be limited to those of the above-described embodiment, and various methods are conceivable. For example, it may be as shown in FIG.
7 to 9 are such that the identification pieces 27a and 27b also serve as rotation stopper pieces.
The terminals 25a and 25b shown in FIGS. 7 to 9 are formed with identification pieces 27a and 27b projecting outward in the length direction at the respective leading edges. Both terminals 25a and 25b are formed so as to have a bilaterally symmetric shape, and the identification pieces 27a and 27b are arranged at positions biased to one side of both side edges of the substrate. Further, a contact piece is formed by bending upward at the leading edge of both identification pieces. However, in the first embodiment, the abutting pieces 21a and 21b are made to come into contact with the wall surfaces of the identifying concave portions 14a and 14b. However, in the present embodiment, the side edges of the abutting pieces 29a and 29b are used for identification. By abutting against the wall surfaces of the recesses 24a and 24b, the entire terminals 25a and 25b are effectively prevented from rotating.
[0017]
That is, the identification recesses 24a and 24b are provided on the back wall surfaces of the fitting portions 22a and 22b of the battery B, and are formed at positions corresponding to the identification pieces 27a and 27b of the terminals 25a and 25b in the correct combination. . That is, both fitting parts 22a and 22b are also formed in the left-right symmetric shape.
Other configurations are the same as those of the first embodiment.
[0018]
Even in such a configuration, if an excessive connection between the terminals 25a, 25b and the electrode portions 23a, 23b is attempted, the identification pieces 27a, 27b become incompatible with the identification recesses 24a, 24b, and the surroundings. The terminals 25a and 25b cannot be connected because they interfere with each other. As a result, erroneous assembly can be prevented.
Further, the identification means does not necessarily have to be formed integrally with the terminal, and may be formed separately from the terminal. For example, the cover 30 may be attached to the terminal, and the cover 30 may have a symmetrical shape.
[0019]
The present invention can be modified in various ways, and the following modifications are also included in the technical scope of the present invention.
(1) The means for insulating the screw shafts 13a, 13b from the electrode portions may be provided separately from the screw shafts 13a, 13b.
(2) The screw shafts 13a, 13b and the electrode part may be integrated with each other by other fixing means, not necessarily by insert molding.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an assembly structure of Embodiment 1. FIG. 2 is a plan view showing an assembled state of an electrode part and a terminal. FIG. 3 is a side view. FIG. 5 is an enlarged cross-sectional view showing a connection state between a terminal and an electrode portion. FIG. 6 is an enlarged cross-sectional view showing a connection state in Embodiment 2. FIG. 7 is an incorrect assembly of the electrode portion and terminal in another embodiment. Exploded perspective view showing the structure of prevention [FIG. 8] Plan view showing normal assembly state of terminal and electrode part [FIG. 9] Plan view in case of incorrect assembly [Explanation of symbols]
10a, b, 22a, b, 30a, b ... fitting parts 11a, b, 23a, b, 31a, b ... electrode part 13 ... screw shafts 13a, 13b
14a, b, 24a, b, 34a, b... Identification recesses 15a, b, 25a, b, 35a, b... Terminals 17a, b, 27a, b ... Identification pieces 18a, b, 38a, b. ... Nut 20 ... Insertion holes 21a, b ... Contact piece CO ... Cover 30

Claims (3)

A shaft member for connecting a corresponding terminal to each of the negative electrode part and the positive electrode part is provided upright from a conductive surface formed on the surface of each electrode part, and the terminal and the electrode Both of the parts can be connected to the shaft member only when they are in a normal correspondence relationship, and in the case of an incorrect correspondence relationship, connection to any shaft member is disabled. A battery provided with an identification means,
The shaft member is provided with an insulating means for maintaining insulation from the electrode portion, and when the terminal is connected to the shaft member, the shaft member can be contacted around the shaft member. And battery. The shaft member includes a connecting shaft connected to the terminal and a large-diameter head provided at one end of the connecting shaft and embedded in the conductive surface, and the head is coated with an insulating film. The battery according to claim 1. The battery according to claim 1, wherein the shaft member is integrally formed of an insulating material.

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