JPH05159769A - Lead-acid battery - Google Patents

Abstract

PURPOSE:To prevent short-circuiting in a strap and corrosion of the strap by alternately connecting positive and negative plates wound by a separator and insulated, and parallelly connecting a lug, provided in a side edge with which the separator does not contact, by the strap. CONSTITUTION:A plurality of positive and negative plates 2, 3 are insulated by winding a continued separator 4 via side parts of each plate 2, 3. A negative pole current collector lug 12 is provided in a side edge 3a not wound by the separator 4 of the negative plate 3, to parallelly connect each lug 12 in a plate side part by a negative pole strap 6. A positive pole current collector lug 11 is provided in a side edge 2a not wound by the separator 4 of the positive plate 2, to connect the lug 11 in a plate side part by a positive pole strap 5. The straps 5, 6 are respectively connected to negative and positive pole terminals 8, 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in lead acid batteries.

[0002]

2. Description of the Related Art Conventionally, a structure of a separator which insulates a cathode plate and an anode plate constituting a lead-acid battery electrode group is used to prevent a short circuit failure due to a free active material or the like on the electrode plate side during use As shown in FIG. 2, a structure has been proposed in which continuous separators 4 are alternately wound via the side parts of the cathode plate 3 and the anode plate 2 to insulate both the electrode plates and the electrode plate side parts, Some have been put to practical use.

[0003]

However, the above-mentioned conventional lead-acid battery has the following drawbacks.
(1) When used for a long period of time, the upper end of the anode plate 2 often comes into contact with the lower surface of the cathode strap 6 due to the anode plate 2 extending in the height direction, which often causes a short-circuit failure. (2) If an insulator is inserted between the cathode strap 6 and the anode plate 2 in order to prevent the short-circuit failure of (1), a separate component is required, resulting in an increase in cost.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a lead storage battery capable of preventing a short circuit in the strap and a corrosion of the strap. is there.

[0005]

A zigzag (separately folded) continuous separator for separating the anode plates and the cathode plates, which are alternately arranged, and a separator for each electrode plate.
Lead-acid battery comprising a current collecting ear provided on a side edge which is not in contact with each other, and a strap provided on a side portion of the electrode plate for connecting the current collecting ears in parallel with each other, Further, the above problem is solved by using the above monoblock lead acid battery having a plurality of cells, and the inter-cell connecting portion is provided at a position lower than the upper edges of the bipolar plates.

[0006]

[Function] Since the strap is not located above the electrode plate, the electrode plate, which is a drawback of the conventional storage battery,
In particular, there is no accidental short circuit with the strap due to the upward extension of the anode plate during use of the storage battery. Further, since the side of the anode plate facing the strap of the anode plate and the side of the anode plate facing the strap of the electrode plate are completely insulated by the separator, there is no risk of a short circuit at the strap portion. Furthermore, when configuring a monoblock storage battery, the cell-to-cell connection can be provided at a position lower than the upper surface of the electrode plate, so there is no exposure to the gas phase due to a decrease in the electrolyte level when using the storage battery, and cell-to-cell connection is possible. The shortening of the life due to corrosion of the parts can be reduced.

FIG. 1 is a plan cross-sectional view of a main part of a unit cell according to one embodiment of the present invention, and FIG. 1 is a front cross-sectional view thereof. A plurality of anode plates 2 and cathode plates 3 are insulated by winding a continuous separator 4 via the side portions of each electrode plate. This is a so-called zigzag sepa and katsura folding sepa. Cathode collector ears 12 are provided on the side edge 3a of the cathode plate 3 on which the separator 4 is not wound, and the cathode collector ears 12 are connected in parallel by the cathode straps 6 on the side of the electrode plates. Further, the anode current collector ear 1 is attached to the side edge 2a of the anode plate 2 where the separator 4 is not wound.
1 is provided, and each anode collecting ear 11 has an anode strap 5
The electrodes are connected in parallel on the side. The anode strap 5 and the cathode strap 6 are connected to the cathode terminal 8 and the anode terminal 7, respectively. Although FIG. 1 shows an example of a side terminal type in which the terminals 7 and 8 are located on the side surface of the battery case, it is possible to arbitrarily position the terminals 7 and 8 on both sides of the upper liquid battery 9 like a conventional storage battery. is there.

FIG. 3 is a cross-sectional view of an essential part of an upper surface when the present invention is applied to a lead-acid battery for an automobile, and FIG. 4 is a front sectional view. The one-cell anode plate 2 is composed of three sheets, and the cathode plate 3 is composed of four sheets, and the respective electrode plates are insulated by the separator 4 wound via the side parts of the electrode plates. The collector ears 5 and 6 are provided on the side portions 2a and 3a of the bipolar plate on which the separator 4 is not wound. These collecting ears
Anode straps 5 and cathode straps 6 provided on the sides of the electrode plates are connected in parallel. Cathode strap 6
Are connected to the anode straps 5 ′ of the adjacent cells via the inter-cell connection portion 10 to form a monoblock battery. The inter-cell connecting portion 10 is provided at a position lower than the position of the upper end 14 of the electrode plate. Even if the electrolyte surface 13 is abnormally lowered during use of the storage battery and the electrode plate is exposed to the gas phase, the cell-to-cell connection is not exposed, so prevent corrosion of the cell-to-cell connection at the gas-liquid interface. You can

[0009]

According to the present invention, since the strap is not positioned above the electrode plate, this is a drawback of the storage battery having the conventional structure. It is possible to prevent a short circuit accident with the strap due to the extension to. Further, since the side of the anode plate facing the strap of the anode plate and the side of the anode plate facing the strap of the electrode plate are completely insulated by the separator, there is no risk of a short circuit at the strap portion. Also, when configuring a monoblock storage battery, the cell-to-cell connection can be provided at a position lower than the upper surface of the electrode plate, so there is no exposure to the gas phase due to a drop in the electrolyte level during use of the storage battery. There is a side effect that shortening of the life due to corrosion of parts can be reduced. Moreover, in carrying out the present invention, it is not necessary to increase the number of materials and parts to be used as compared with the conventional structure, and in this respect, the industrial value is great.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing a conventional example.

FIG. 6 is a diagram showing a conventional example.

[Explanation of symbols]

 2 Anode plate 2a Anode plate side edge 2a Anode plate upper edge 3 Cathode plate 3a Cathode plate side edge 3b Cathode plate upper edge 4 Zigzag (separated) continuous separator 5, 6 Strap 10 Inter-cell connection section 11, 12 Current collector ear

Claims (2)

[Claims] 1. A zigzag shape (a zigzag pattern) for separating anode plates (2) and cathode plates (3) arranged alternately.
Continuous separator (4) and current collecting ears (11, 11) provided on the side edges (2a, 3a) of the respective electrode plates (2, 3) not in contact with the separator (4).
12) and straps (5, 6) provided on the side of the electrode plate for connecting the current collecting ears (11, 12) to each other in parallel.
A lead storage battery comprising: 2. An inter-cell connecting portion (1) having a plurality of cells.
0) is provided at a position lower than the upper edges (2b, 3b) of the bipolar plates (2, 3), and the monoblock lead-acid battery according to claim 1.