JPH0644013U - Collective sealed lead acid battery - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a collective sealed lead-acid battery that prevents deformation of the battery case during use and does not apply tension to the connecting bar or the lead wire. A hermetically sealed lead acid battery comprising a plurality of hermetically sealed lead acid batteries, wherein a protruding piece is provided on an outer surface of the hermetically sealed lead acid battery, the outer surface being parallel to an electrode plate side wall of the battery case, and the adjacent hermetically sealed lead acid batteries The lead-acid battery is characterized in that the projecting pieces are connected to each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a collective sealed lead acid battery in which a plurality of sealed lead acid batteries are connected.

[0002]

[Prior art]

 A negative electrode absorption type sealed lead-acid battery that absorbs oxygen gas generated in the positive electrode in the negative electrode has a structure in which a positive electrode plate and a negative electrode plate are stacked with a separator in between and placed in a synthetic resin battery case. Conventionally, a battery case 1 for a sealed lead-acid battery of this type is a wall surface having a flat surface shape with a uniform thickness as shown in FIG. 3, or a rib 2 for reinforcement on the outer peripheral portion as shown in FIG. It had a wall surface provided with the like.

When the sealed lead-acid batteries composed of such battery case 1 are connected in series, for example, as shown in FIG. 5, the wall surfaces of the sealed lead-acid batteries A and A ′, which are parallel to the electrode plate surface, are slightly separated from each other. , And the negative pole 4 of the sealed lead-acid battery A and the positive pole 3 of the sealed lead-acid battery A ′ adjacent to each other are electrically connected by a connection bar 5 or a lead wire.

[0004]

[Problems to be solved by the device]

 The sealed lead-acid battery uses a so-called oxygen cycle in which the negative electrode absorbs the oxygen gas generated from the positive electrode during charging, thus achieving sealing. Therefore, depending on the operating conditions, there are two states: when the internal pressure of the battery becomes lower than atmospheric pressure (hereinafter referred to as a reduced pressure state) and when the internal pressure of the battery becomes higher than atmospheric pressure (hereinafter referred to as a pressurized state). Occurs. In the depressurized state, a pressure difference of about 300 mmHg may be applied. In response to this, the battery case dents inward, and in the case of the pressurized condition, the battery internal pressure rises up to the safety valve opening pressure, and May swell. Such deformation of the battery case, especially swelling of the battery case, greatly affects the characteristics and life of the battery.

In a sealed lead-acid battery in which a mat-shaped separator is impregnated with an electrolytic solution and retains the solution, an appropriate pressure (hereinafter referred to as group pressure) is applied to the electrode plate group so that the positive electrode and the negative electrode are separated by a separator. It is important to control the absorption of oxygen gas at the negative electrode while maintaining liquid contact. For example, in a conventional sealed lead-acid battery having the shape of a conventional battery case shown in FIG. 3, if the battery is continuously charged at a temperature of 40 ° C., the battery container 1 swells so that no group pressure is applied and the positive and negative electrodes and the separator are peeled off. Therefore, there is a problem that the discharge capacity is reduced. In addition, there is a problem that the internal pressure of the battery is reduced during discharging or standing, the battery case 1 is dented, excessive pressure is applied to the electrode plate group, and the positive electrode plate and the negative electrode plate are short-circuited.

As shown in FIG. 4, it has been attempted to reinforce by providing ribs 2 and the like on the outside of the side wall of the battery case which is in contact with the electrode plate surface against the deformation of the battery case of such individual sealed lead acid batteries. It was However, such reinforcement greatly increases the material cost of the battery case 1 and has been used only for special batteries.

Further, when a plurality of batteries A and A ′ are arranged adjacent to each other as shown in FIG. 5, a force is applied to the adjacent batteries because the battery case 1 swells, and a battery connection is made. There was a problem that the connection bar or lead wire was pulled. The present invention solves such a problem, and by connecting the wall surfaces of adjacent battery cases to each other, the deformation of the battery case is reduced and the tension is not applied to the connecting bar or the lead wire. The purpose is to

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a collective sealed lead-acid battery comprising a plurality of sealed lead-acid batteries, wherein a protruding piece is provided on the outer surface of the sealed lead-acid battery, which is parallel to the plate surface of the battery case side wall. Is provided, and the projecting pieces of the adjacent sealed lead-acid batteries are connected to each other.

[0009]

[Work]

 Since the protruding pieces of adjacent batteries are connected to each other, the battery case does not dent or swell even when the battery internal pressure is reduced or increased.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a sealed lead-acid battery according to the present invention, in which 1 is a battery case, 3 is a positive electrode pole, 4 is a negative electrode pole, 6 is a battery case lid, 7 is an electrode plate, and 8 is a strap. , 9 are exhaust plugs, the electrode plates 7 are arranged in the longitudinal direction of the battery case 1, and the working surface is parallel to the short side surface of the battery case 1. A projecting piece 10 having a U-shaped upper surface is integrally formed on the outer wall of the short side surface of the battery case 1. The shape of the protruding piece 10 is not limited to the U-shaped upper surface, but may be, for example, an L-shaped upper surface or a T-shaped surface.

FIG. 2 is a plan view of an assembled battery in which a plurality of the sealed lead-acid batteries A shown in FIG. 1 are arranged in the longitudinal direction and connected in series. The pieces 10 are brought into contact with each other, the projecting pieces 10 are fitted together by a jig 11, and then the negative pole columns 4 and the positive pole columns 3 of the batteries A and A ′ are connected by a connection bar 5. With this arrangement and connection, even if the short side surfaces of the battery case 1 try to dent or bulge due to changes in the internal pressures of the batteries A and A ′, the adjacent protruding pieces 10 and the jig 11 are used. Since the forces in opposite directions are applied, the short side faces do not dent or swell. The protrusion 10 can also be used as a handle for the battery.

[0012]

[Effect of device]

 Since the present invention is configured as described above, it is possible to prevent deformation of the battery case facing the working surface of the electrode plate, and to provide a collective sealed lead-acid battery in which no tension is applied to the tangent bar or the lead wire. it can.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a sealed lead acid battery according to the present invention.

FIG. 2 is a plan view of an essential part showing an embodiment of the present invention.

FIG. 3 is a perspective view of a main part showing an example of a conventional battery case.

FIG. 4 is a main part perspective view showing another example of a conventional battery case.

FIG. 5 is a plan view of a main part of a conventional collective sealed lead acid battery.

[Explanation of symbols]

 1 Battery Case 7 Electrode Plate 10 Projecting Piece A, A'Sealed Lead Acid Battery

Claims (1)

[Scope of utility model registration request] 1. A collective sealed lead acid battery comprising a plurality of sealed lead acid batteries, wherein projecting pieces are provided on the outer surface of the sealed lead acid battery, the outer surface being parallel to the plate surface of the side wall of the battery case, and adjacent to each other. A collective sealed lead acid battery, wherein the protruding pieces of the sealed lead acid battery are connected to each other.