JP3373401B2 - Connection structure between battery post and signal wire - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for connecting a battery post and a signal wire.

[0002]

2. Description of the Related Art As means for connecting battery posts standing upright on the upper surfaces of a plurality of batteries, as shown in FIG. 4, a conductor 2A made of a stranded wire connecting battery posts P to each other is resin-coated 2B for conductivity. A connector 1 having plate-shaped terminals 3 fixed to both ends of the member 2 and a cover 4 formed of a soft resin material and formed into an elongated box shape whose lower surface is entirely opened are used. The battery posts P are connected to each other by fitting the mounting holes (not shown) of both terminals 3 into the battery posts P and fixing them with the nuts N. Further, the connector 4 is covered with the cover 4 from above to prevent the hand from coming into contact with the battery post P and the conductive member 2, and at the same time waterproof.

In the above structure, in order to detect the voltage of the battery B, the terminal 6 fixed to the signal wire 5 of the voltage detection circuit (not shown) is fitted to the battery post P, and the nut N is used to connect the connector 1. A structure is used in which the terminal 3 and the terminal 3 are fixed together. Signal wire 5 connected to the battery post P
Is drawn out from the cutout portion 4A of the cover 4.

[0004]

SUMMARY OF THE INVENTION In the above conventional one,
Since the lower surface of the cover 4 was open, the waterproof function could not be exerted against water from the side or the bottom. The present invention was created in view of the above circumstances, and it is an object of the present invention to connect a signal wire to a battery post and to reliably waterproof the connecting portion.

[0005]

According to a first aspect of the present invention, there is provided a battery post erected on an outer surface of a battery, a connecting terminal fixed to a connecting tool for connecting the battery posts together,
A connection structure for a battery post and a signal wire, in which a signal terminal fixed to a signal wire is fixed together with a nut, and a connection portion between the battery post and both terminals is covered with a cover, and the signal wire is connected to the cover . Is open at one end to surround the battery post and both terminals, and
Seal the formed seal on the outer surface of the battery in a watertight manner.
A covered cylinder part to be worn is provided, and this covered cylinder part is
A rubber cylinder body, and the seal portion of the cylinder body
Is equipped with a resin cap that closes the opening on the opposite side.
The cylinder main body is slid out to the outside and
Sealing tube part that fits the signal wire in a watertight manner is integrally formed
It has been configured.

According to a second aspect of the present invention, in the first aspect of the invention, a circumferential ridge is formed on the inner circumference of the seal tube portion so as to elastically contact the outer circumference of the signal wire. However, it has a feature.

[0007]

[Operation and effect of the invention]

<Invention of Claim 1> A watertight state is provided between the opening edge of the covered tubular portion and the outer surface of the battery by a seal portion, and the signal electric wire is watertightly fitted in the seal tubular portion in the lead-out path of the signal electric wire. Therefore, the inside of the covered tubular portion, that is, the connecting portion between the battery post and both terminals is reliably waterproof.

<Invention of Claim 2> Since the ridges are in close contact with the outer circumference of the signal wire over the entire circumference, high sealing performance is exhibited.

[0009]

DETAILED DESCRIPTION OF THE INVENTION

<First Embodiment> A first preferred embodiment of the present invention will be described below with reference to FIGS. The battery posts P standing upright on the upper surface of each of the plurality of batteries B are connected to each other by the connector 10, and each battery post P has a signal wire of a voltage detection circuit (not shown). 28 is connected.

First, the connector 10 will be described. The connection tool 10 includes a conductive member 11, a connection terminal 12, and a cover 13.
It consists of and. The conductive member 11 is formed by applying a resin coating 15 to a conductor 14 in which metal wires are twisted together, and is capable of bending and deforming in a curved shape. This conductive member 11
The flexure absorbs the variation in the distance between the battery posts P. The connection terminal 12 is composed of a disk-shaped terminal body 16 having a mounting hole 17 fitted in the battery post P at the center and a barrel portion 18 raised from the outer peripheral edge of the terminal body 16. The terminal portion exposed by peeling off the resin coating 15 of the conductor 14 of the conductive member 11 is pressure-bonded to the portion 18.

The cover 13 has a covered cylindrical portion 19 concentric with the connection terminal 12, and a tube 2 separate from the covered cylindrical portion 19.
It consists of 0 and. The covered tubular portion 19 includes a tubular body 21 made of rubber and a cap 22 made of hard resin attached so as to close the opening at the upper end of the tubular body 21. The cylinder body 21 is integrated with the connecting terminal 12 by molding, and the terminal body 16 is arranged so as to close the lower end portion of the cylinder body 21, and the barrel portion 18 extends from the outer peripheral surface of the upper end of the cylinder body 21. Exposed. The crimping portion between the barrel portion 18 and the conductor 14 of the conductive member 11 is covered with the tube 20. The tube 20 is made of heat-shrinkable resin, and both ends of the tube 20 are water-tightly fitted to the outer circumference of the barrel lead-out portion 23 of the barrel body 21 and the outer circumference of the resin coating 15 by shrinkage deformation.

Further, a lip portion 24 is formed on the inner circumference of the upper end portion of the cylinder main body 21 so as to be elastically deformed and closely adhered in a watertight state to the cap 22. Here, the cap 22 will be described. The cap 22 has a disc shape as a whole, and the inner surface of the inner fitting cylindrical portion 2 that is internally fitted to the cylindrical body 21 is formed on the lower surface thereof.
2A and an outer fitting cylinder portion 22B fitted on the cylinder body 21 are provided, and the lip portion 24 is brought into close contact with the outer periphery of the inner fitting cylinder portion 22A. On the other hand, a skirt-shaped seal portion 25 is formed on the lower end edge of the cylinder main body 21 over the entire circumference, and when the connecting terminal 12 is fixed to the battery post P, the seal portion 25 is a battery. The upper surface of B is elastically deformed and comes into close contact in a watertight state.

On the outer periphery of the lower end portion of the cylinder body 21, a seal cylinder portion 26 that projects outward in the radial direction is integrally formed.
On the inner circumference of the seal tube portion 26, as shown in an enlarged view in FIG. 3, circumferential protrusions 27 are provided at a plurality of positions (three positions in the present embodiment) spaced apart in the length direction. It is formed over the entire circumference. The inner diameter of the protrusion 27 is set smaller than the outer diameter of the signal wire 28. The signal wire 28 has a resin coating 3 on the outer periphery of a conductor 29 made of a stranded wire.
The conductor 29 is covered with 0, and the diameter of the conductor 29 is smaller than the diameter of the conductor 14 of the connector 10. At the end portion of the signal electric wire 28, the resin coating 30 is peeled off to expose the conductor 29, and the barrel portion 32 of the signal terminal 31 is crimped thereto. This signal terminal 31 is
An attachment hole (not shown), which has a circular shape concentric with the connection terminal 12 of the connection tool 10, and into which the battery post P is fitted.
Are formed. The plate thickness of the signal terminal 31 is thinner than that of the connection terminal 12.

Next, the operation of this embodiment will be described. First, the assembling of the connector 10 will be described. Assembling is performed by molding the tube main body 21 by molding to form the connection terminals 12
Tube 20 before it is integrated with and before heat is applied
Is loosely fitted to the conductive member 11 and the exposed conductor 1
4 is crimped to the barrel portion 18 of the connecting terminal 12. After that, the tube 20 is slid to a position that covers the pressure-bonded portion, and heat is applied to the tube 20 to shrink it. As a result, the space between the cylinder body 21 and the resin coating 15 becomes waterproof.

Next, the signal wire 28 is assembled to the connector 10. In this work, the signal electric wire 28 before the crimping of the signal terminal 31 is inserted into the seal tubular portion 26, and the signal terminal 31 is crimped to the terminal portion of the signal electric wire 28 that penetrates inside the tubular body 21. To be done. After crimping, the signal electric wire 28 is pulled back to the outside, and the position of the signal terminal 31 is adjusted so as to correspond to the connection terminal 12. When the signal wire 28 is assembled to the connector 10 in this manner, the attachment hole 17 of the connection terminal 12 and the attachment hole (not shown) of the signal terminal 31 are fitted to the battery post P, and the cylinder body is attached. A nut N is inserted from the opening at the upper end of 21 and screwed into the battery post P. A jig (not shown) is inserted into the cylinder body 21 to tighten the nut N, and the signal terminal 31 and the connection terminal 12 are connected. When the cap 22 is fitted into the opening at the upper end of the cylinder body 21, the battery posts P are connected to each other by the connector 10, and the signal wire 28 is connected to the battery post P. Are connected.

In this state, the space between the lower end of the cylinder body 21 and the upper surface of the battery B is waterproofed by the seal portion 25. A gap between the upper end of the cylinder body 21 and the cap 22 is waterproofed by a lip portion 24 of the cylinder body 21. Conductor 14
The crimping portion between the barrel portion 18 and the barrel portion 18 is covered with the tube 20,
Further, the fitting portion between the end of the barrel lead-out portion 23 of the barrel main body 21 and the tube 20 and the fitting portion between the end of the resin coating 15 of the conductive member 11 and the tube 20 are waterproofed by the heat shrinking action of the tube 20. ing. Further, between the seal tube portion 26 and the signal electric wire 28, the ridge 27 of the seal tube portion 26 is elastically deformed and comes into close contact with the outer periphery of the signal electric wire 28 to be waterproof. As described above, the covered tubular portion 1
9 is prevented from flooding. In addition, the inside of the resin coating 15 of the connector 10 is connected to the tube main body 21 via the tube 20.
The inside of the resin coating 15 is also waterproof because it does not directly open to the outside. As described above, in the present embodiment, while connecting the signal electric wire 28 from the outside to the battery post P, it is possible to surely keep this connecting portion in a waterproof state.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the above embodiment, the covered tubular portion 19 is composed of the tubular main body 21 and the cap 22 which is a separate component from the tubular main body 21, but according to the present invention, the covered tubular portion may be an integral component.

(2) In the above embodiment, the signal wire 28 is pulled out to the side opposite to the direction in which the barrel portion 18 of the connector 10 projects, but according to the present invention, the signal wire is pulled out in the direction. It can be set arbitrarily. (3) In the above embodiment, the protrusion 2 is formed on the inner circumference of the seal tube portion 26.
7 is formed to seal the gap with the signal wire 28, but according to the present invention, the inner diameter of the seal tube portion is set to be smaller than the outer diameter of the signal wire without providing a ridge. Alternatively, waterproofing may be achieved by elastically expanding and deforming the entire seal tube portion.

(4) In the above embodiment, the signal wire 28 is sealed from the outside before the signal terminal 31 is crimped.
According to the present invention, the signal wire is crimped and then the signal wire is inserted from the inside of the tube body into the seal tube portion and pulled out to the outside. You may assemble in this way.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a state in which a signal wire is removed from a battery post in Embodiment 1.

FIG. 2 is a cross-sectional view showing a state in which a signal wire is connected to a battery post according to the first embodiment.

FIG. 3 is an enlarged cross-sectional view of a seal cylinder portion according to the first embodiment.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

B ... Battery N ... Nut P ... Battery post 10 ... Connector 12 ... Connection terminal 13 ... Cover 19 ... Cylinder with cover 25 ... Seal part 26 ... Seal tube 27 ... ridge 28 ... Signal wire 31 ... Signal terminal

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hidehiko Iwakawa 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Institute of Technology Co., Ltd. (72) Hirokazu Ichikawa, Kikuzumi, Minami-ku, Nagoya-shi, Aichi No. 7-10 Harness Institute of Technology Co., Ltd. (72) Inventor Yasuyoshi Fukao 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (56) Reference JP-A-11-86836 (JP, A) Flat 11-86838 (JP, A) JP 10-64507 (JP, A) Actually open 52-71026 (JP, U) Actually open 61-183061 (JP, U) Actually open 6-5114 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01M 2/30 H01M 2/34

Claims (2)

(57) [Claims] 1. A battery post that is erected on the outer surface of a battery, and a connection terminal fixed to a connecting tool for connecting the battery posts to each other and a signal terminal fixed to a signal wire are fixed together by nuts. A connection structure of a battery post and a signal wire in which a connection portion between the battery post and the terminals is covered with a cover, wherein the cover has one end opened to surround the battery post and the terminals. Formed with the opening edge
A lid cylinder part is provided for making the seal part adhere to the outer surface of the battery in a watertight manner , and the lid cylinder part is made of a rubber cylinder body and the cylinder body.
Made of resin that closes the opening on the side opposite to the seal part in
The cylinder main body is provided with a cap, and is projected to the outside in a slender shape for the signal.
A seal cylinder part that fits the electric wire in a watertight manner is integrally formed
Connecting structure of the battery post and the signal wires, characterized in that is. 2. The battery post and the signal post according to claim 1, wherein a circumferential projection is formed on the inner circumference of the seal cylinder portion so as to elastically contact the outer circumference of the signal wire. Electric wire connection structure.