JP2005116287A - 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 a cover 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 3 to be casted inside a cover 1 and a connecting conductor 4 projecting from the bushing terminal are casted to a cover, the other end of the connecting conductor is exposed to a cover recessed part 2, the state judging device 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, and the bottom surface of the recessed part is formed in an inclined bottom surface descending from a part where the connecting conductor of the recessed part formed on the cover upper surface toward the recessed part in which the state judging device is housed. <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 resistance to determine the state of charge or deterioration of the storage battery in a recess on the lid of the storage battery. .

  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 lid recess to cause a short circuit between both terminals at an early stage.

  When the electrolyte that has oozed reaches the recessed portion where the connecting conductor is exposed, the electrolyte does not fall down and accumulate on the inclined bottom surface. Therefore, in order for the liquid to reach the mating terminal, an electrolyte solution that fills the inclined surface is required, and the time to reach the liquid junction can be extended accordingly, so that the electrolyte may ooze out Even if the electrolytic solution enters the recess, the liquid junction can be prevented for a long time.

  In the present invention, the bottom surface of the recess in which the connection part connecting the exposed connection conductor and the state determination device is accommodated is an inclined bottom surface that descends toward the state determination device side, and FIG. 1 shows an embodiment of the present invention. FIG. Reference numeral 1 denotes a lid, which is formed by molding a polypropylene resin. Reference numeral 2 denotes a recess for storing the state determination device. The connection conductors 4 connected to the bushing terminals 3 are exposed at both ends thereof, and a flat bottom surface portion for storing the state determination device is provided at the center. The bottom surface 2a between the two parts is inclined (inclination angle is 5 degrees). The inclination is an inclined bottom surface that descends from a portion exposed to each other toward a portion in which the state determination device is accommodated.

  FIG. 2 is a top view of the lid. The concave portion 2 has a large and wide portion in which the state determination device is accommodated. The exposed part is narrow. In the figure, 5 is a liquid injection port.

  In such a storage recess, the state determination device 6 as shown in FIG. 3 is stored with the lead wire 7 connected to both ends, and connected to the connecting conductor exposing the tip of the lead wire 7 by soldering or the like. Then, the adhesive is filled in the concave portion and solidified and fixed.

  In addition, although the case where the lead wire 7 was formed in the state determination apparatus 6 was shown in the said embodiment, the plate-shaped terminal was formed in this state determination apparatus, and this plate-shaped terminal was bend | folded along the inclined bottom face A thing may be used.

  A product of the present invention configured as described above and a comparative product having a diameter of 8 mm in the lower cover of the connection conductor exposed in the recess and having electrolyte applied to the connection conductor were prepared (with a state determination device and The lead wires and plate-like terminals to which the connecting conductors are connected are completely covered with resin to insulate them from the outside), and the lid in a state where no adhesive resin is poured into the storage recesses is placed in the battery case in which the electrode plates are stored. To produce a lead-acid battery.

Each of the produced lead storage batteries was continuously overcharged at a current of 4.5 A in an environment of 60 ° C.
As a result, the time when the terminals were short-circuited due to the entry of sulfuric acid was 96 hours for the comparative product, but the product of the present invention was not short-circuited even for 200 hours.

Sectional view of the lid of the embodiment Top view of the lid of the embodiment Embodiment perspective view of a state determination device

Explanation of symbols

1 .. Lid 2 .. Recess 2a .. Inclined bottom 3 .. Bushing terminal 4 .. Connection conductor

Claims (1)

In a storage battery formed by connecting a state determination device stored in a recess on the top surface of the lid and a connection conductor exposed in the recess and connected to a bushing terminal, the connection conductor is exposed at the bottom of the recess in which the connection is stored. A storage battery, wherein the storage battery is formed on an inclined bottom surface that descends from a recess toward a recess in which the state determination device is stored.

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