JP2005116286A - Storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent short circuit between both terminals even when an electrolyte is penetrated into a recessed part in the case where a state judging device is housed in the recessed part of a storage battery, a filler is filled in the recessed part, and the state judging device is fixed to the recessed part. <P>SOLUTION: In the storage battery in which a bushing terminal to be casted inside a cover, a connecting conductor projecting from the bushing terminal are casted in the cover 2, the other end of the connecting conductor is exposed to a cover recessed part 5, the state judging device 6 housed in the recessed part is connected to the other end of the exposed connecting conductor, the filler is filled in the recessed part, and the state judging device is fixed to the recessed part, a recessed groove 7 crossing across the bottom surface is formed on the bottom surface of the recessed part formed on a cover upper surface. By this constitution, the filler is surely let to exist in the state judging device and on the bottom surface of the recessed part, and even if the electrolyte is penetrated into the recessed part, the electrolyte is interrupted, and short circuit between both terminals is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a storage battery that is electrically connected to both terminals of a storage battery, and that stores a state determination device that measures the storage battery voltage and internal resistance to determine the state of charge and deterioration of the storage battery in a recess on the top surface of the storage battery. is there.

  It is known to provide a device for determining the state of the storage battery by measuring the state of charge of the storage battery, the internal resistance of the storage battery, etc. on the lid of the storage battery, and connecting the determination device to the storage battery terminal inside the storage battery to determine the state. (For example, Patent Documents 1 and 2).

  It is also known that this state determination device is housed in a lid recess, and the state determination device is connected to an exposed terminal of a storage battery (Patent Document 3).

  Further, the present applicants have proposed that the connection between the state determination device and the storage battery terminal is performed inside the lid, not inside or outside the storage battery (Patent Document 4).

Japanese Utility Model Publication No. 60-55072 International Publication No. 01/059433 JP-A-9-330743 Japanese Patent Application No. 2002-308572

  When connecting the state determination device and the storage battery terminal, the connection work is troublesome in the method of connecting inside the storage battery, and the exposed connection tool must be covered for safety in the method of connecting outside. There are problems such as.

  Therefore, a connecting conductor that connects the bushing terminal and the state determination device is integrally provided inside the lid, that is, in the lid of the bushing terminal that is inserted simultaneously when the lid is molded, and the other end of the connecting conductor is formed on the upper surface of the lid. It is safe and preferable to form a lid so as to be exposed in the recess for accommodating the state determination device, and to connect the state determination device to the other end of the exposed connection conductor.

  However, in the case where the connecting conductor is provided on the bushing terminal and the other end is exposed in the lid recess, the connecting conductor is embedded in the lid together with the bushing terminal, but the boundary between the resin and the bushing terminal or the connecting conductor Therefore, there is a concern that the electrolyte may ooze out and enter the concave portion of the lid to cause a short circuit between both terminals at an early stage.

  The present invention solves the above-mentioned fear problem by forming a concave groove across the bottom surface of the lid concave portion in which the state determination device is accommodated and filled with the adhesive.

  The formed concave groove lengthens the path and eliminates the risk of a liquid short circuit. Furthermore, since the adhesive is sufficiently present in the part, the adhesion becomes strong and the path of the liquid short circuit can be blocked, so that even if the electrolyte oozes out into the storage recess, The possibility of reaching the counterpart terminal and causing a liquid junction can be eliminated, and an effect is obtained in which a storage battery with improved reliability is obtained.

  In the present invention, a concave groove that crosses the bottom surface is formed in the bottom surface of the housing recess of the state determination device formed on the top surface of the lid, and FIG. 1 is a perspective view showing an embodiment of the present invention. 1 is a lead storage battery, 2 is a lid, 3 is a battery case, and 4 is a terminal.

  A recess 5 is formed on the upper surface of the lid 2. A state determination device 6 is accommodated in the recess 5. The configuration so far is not different from the conventional one. The present invention is characterized in that a belt-like concave groove 7 is formed on the bottom surface of the concave portion 5 so as to cross the concave portion 5. In the illustrated embodiment, two concave grooves 7 are formed on the left and right. Its depth is 2 mm. In addition, the depth of the recessed part 5 is 7.5 mm.

  The state determination device 6 is housed in the recess 5 of the lid 2 formed in this way, and an adhesive is poured into the gap and the groove 7 between the state determination device 6 and the recess 5 and fixed.

  The state determination device 6 has terminal portions 6a protruding at both ends thereof, is integrally formed with the terminal 4 of the lead storage battery 1, and is soldered and connected to the connection conductor 8 with the other end exposed in the recess 5 of the lid 2. Thus, the hole 6b formed in the terminal portion 6a penetrates the protrusion 8a formed at the tip of the other end exposed in the concave portion 5 of the connection conductor and is solder-welded.

  Since the concave groove 7 is formed in the concave portion 5 and the adhesive is poured into the concave portion 5 and solidified, the adhesion becomes strong and the adhesive easily enters. The state of the concave groove 7 is surely determined at the concave groove portion 7. Since an adhesive can be present between the devices 6, the gap between the terminals 4 of the lead-acid battery can be surely eliminated, and by any chance the gap between the bushing terminals inserted into the lid should be within the recess 5. Even if the electrolyte begins to ooze out, it is surely cut off by the adhesive in the concave groove 7, so that an accident such as a short circuit does not occur, and the reliability is improved.

  In the drawing, the recess 9 formed in the vicinity of the side surface of the recess 5 is inserted with a jig such as a driver bar when removing the state determination device from the lid when the used storage battery is discarded and reused. It is for making it easy to peel off by using a lever and is partitioned from the recess 5 by a thin partition wall.

The number of the concave grooves 7 described above is not limited to two, and may be one or three or more. Moreover, although the cross-sectional shape of the ditch | groove 7 was made into the rectangle, not only this but semicircular shape etc. may be sufficient.
In addition to forming the concave groove 7 so as to go straight through the concave portion as described above, the concave groove 7 may be formed so as to cross obliquely, or may be a wide groove in which the concave groove occupies most of the bottom surface.
Further, a concave groove may be formed also on the side surface of the concave portion 5.

  Since the present invention is such that a concave groove is formed across the bottom surface in the concave portion, the adhesive can enter well and the adhesive can be present between the state determining device and the concave portion more reliably. In addition, the resin can be reliably present between the bottom surface of the concave portion and the bottom of the recess, so that the formation of a gap can be prevented and the path between both terminals can be lengthened, and the time to short circuit can be lengthened accordingly.

  In particular, the bottom surface is a part where the state determination device is placed and abuts each other, so it is a place where the adhesive does not enter and the gap is likely to come out, but the existence of the concave groove can surely keep the adhesive And closes the gap.

It is a disassembled perspective view of the lid | cover of embodiment of this invention.

Explanation of symbols

1 ・ ・ Lead battery 2 ・ ・ Lid 5 ・ ・ Recess 6 ・ ・ State judgment device 7 ・ ・ Dove groove

Claims (1)

In a storage battery in which a state determination device is housed in a lid recess, an adhesive is filled in the recess, and the state determination device is fixed in the lid recess, a concave groove is formed across the bottom of the recess. A featured storage battery.

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