JP2005011602A - Battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a battery pack capable of preventing deformation of a tapered terminal at connection of a connection fitting to the tapered terminal. <P>SOLUTION: In the battery pack with a plurality of unit cells 4 electrically connected with each other housed in a case 5, and with a positive output tapered terminal and a negative output tapered terminal fitted at either end of each unit cell connected, and holes into which the positive output tapered terminal 9 and the negative output tapered terminal 9 are penetrated, are formed on the case 5, and the case 5 is integrated with an insertion-coupling cylinder part 13 for insertion-coupling and fastening the tapered terminals 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembled battery in which a plurality of unit cells are housed in a case and electrically connected to each other.
[0002]
[Prior art]
A lead storage battery is composed mainly of lead powder in which a part of lead is oxidized, water and dilute sulfuric acid, and if necessary, additives are added and kneaded. Paste electrode plates coated on a continuous porous lattice and dried are widely used. This electrode plate is further combined with a separator (separator plate) into a group of electrode plates, incorporated into the battery case, then added with dilute sulfuric acid for chemical charging, or incorporated into the battery case after chemical charging, Battery performance is given.
[0003]
By the way, one of the main uses of lead-acid batteries is to start automobile engines. This is to generate a spark in the engine by a large current discharge. However, if the discharge voltage at this time is low or the discharge time is short, the engine does not start.
[0004]
In order to eliminate this problem, a wound lead-acid battery having higher startability has been proposed (for example, see Patent Document 1).
[0005]
When this wound lead-acid battery is used for starting an automobile engine, it is usually used as a six-piece assembled battery connected in series.
[0006]
This assembled battery may be composed of 6 2V cells installed in one battery case, or may be assembled into a battery case or the like by combining six independent 2V batteries.
[0007]
In the latter case, the 2V batteries are generally connected by a bolt-nut system or the like, but tapered terminals are used for the positive output terminal and the negative output terminal as the assembled battery. The taper terminal is connected to a connection fitting on the vehicle side.
[0008]
[Patent Document 1]
US Pat. No. 5,677,078 (FIG. 3)
[0009]
[Problems to be solved by the invention]
However, if the taper terminal is tightened too much with the connection fitting, an excessive tightening torque is applied, which causes a problem that the taper terminal is deformed.
[0010]
The objective of this invention is providing the assembled battery which can prevent a taper terminal deform | transforming at the time of the connection metal fitting with respect to a taper terminal.
[0011]
[Means for Solving the Problems]
In the present invention, a plurality of unit cells are housed in a case, each unit cell is electrically connected to each other, and a positive output taper terminal and a negative output taper terminal are provided at both ends of the connected unit cells. Intended for assembled batteries.
[0012]
In the assembled battery according to the present invention, the case is provided with holes through which the positive output taper terminal and the negative output taper terminal pass, and the case has a fitting tube portion that fits and tightens the taper terminal in the case corresponding to each hole. It is provided integrally.
[0013]
When the taper terminal is tightened by the fitting tube portion provided in the case as described above, the connection work can be performed while preventing the taper terminal from being deformed when the connection fitting is connected.
[0014]
In this case, it is preferable that the fitting cylinder portion is provided with a screw that is screwed in a radial direction with a thick portion in the circumferential direction to tighten the tapered terminal. With this configuration, the gripping of the tapered terminal by the fitting cylinder portion is ensured.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 6A and 6B show a first example of an embodiment of an assembled battery of the present invention. FIG. 1 is a side view of an example of a unit cell used in this example, and FIG. ) To (C) are a plan view, a side view and a bottom view of the bottom member of the case used in this example, FIG. 3 is a plan view of a state in which each unit cell is incorporated in the bottom member, and FIGS. The plan view and side view of the taper terminal used in this example, FIGS. 5A to 5C are the plan view, side view and bottom view of the lid member of the case used in this example, and FIGS. It is the top view of the state which fitted the fitting cylinder part of the case to the taper terminal in this example, and the principal part longitudinal cross-sectional view of the assembled battery of this example.
[0016]
The configuration of the assembled battery of this example will be described in detail. First, the configuration of the electrode plate group will be described.
[0017]
The negative electrode plate is made by kneading lead powder, 13% by mass of diluted sulfuric acid (specific gravity 1.26: 20 ° C.) with respect to the lead powder, and 12% by mass of water with respect to the lead powder. A paste was prepared, and 240.0 g of the negative electrode active material paste was filled in a current collector made of a grid, and then left to age for 18 hours in a temperature of 50 ° C. and a humidity of 95%, and then a temperature of 25 ° C. and a humidity of 40 % For 2 hours and dried to prepare an unformed negative electrode plate.
[0018]
When preparing the positive electrode plate, a kneading pot that can be cooled was used to keep the temperature constant during the kneading. The positive electrode plate has 0.01% by weight sodium sulfate and cut fiber added to the lead powder, 13% by weight diluted sulfuric acid (specific gravity 1.26: 20 ° C.), and the lead powder. A positive electrode active material paste was prepared by kneading 12% by mass of water. Next, 200.0 g of this positive electrode active material paste was filled in a current collector made of a cast grid, and then left to age for 18 hours in a temperature of 50 ° C. and a humidity of 95%, and then a temperature of 25 ° C. and a humidity of 40 % For 2 hours, and dried to prepare an unformed positive electrode plate.
[0019]
The unformed negative electrode plate and unformed positive electrode plate thus prepared were wound through a separator made of glass fiber to obtain an electrode plate group.
[0020]
As shown in FIG. 1, this electrode plate group is arranged in a battery case 1 made of a battery can, covered with an upper lid 2, and the positive terminal 3a and negative terminal 3b of the upper lid 2 are connected to the electrode plate group. The inside was filled with dilute sulfuric acid having a specific gravity of 1.225 (20 ° C.) as an electrolyte. The obtained unformed battery was formed at 5.0 A for 23 hours to obtain a single battery 4.
[0021]
As shown in FIG. 3, the unit cell 4 is vertically oriented as shown in FIG. 3 in the fitting recesses 7 that are provided in a total of six pieces in two rows on the bottom member 6 of the case 5 shown in FIGS. Fit into and set. The adjacent unit cells 4 are electrically connected by fitting a hole of the connection fitting 8 into one positive terminal 3a and the other negative terminal 3b and screwing a nut (not shown). With this connection, six unit cells 4 are connected in series. Tapered terminals 9 shown in FIGS. 4A and 4B are respectively connected to the negative terminal 3b and the positive terminal 3a at both ends in the connection direction of the six unit cells 4 connected in series. That is, the taper terminal 9 has a columnar column 9b connected to the lower part of the truncated cone-shaped taper part 9a, and a plate-like part 9c connected to the lower part of the columnar part 9b in a direction perpendicular to this, The plate-like portion 9c is provided with a terminal through hole 9d. The terminal through holes 9d of the respective taper terminals 9 are fitted into the negative terminals 3b and the positive terminals 3a at both ends connected in series, and by fastening nuts (not shown) screwed into the respective negative terminals 3b and the positive terminals 3a. Each taper terminal 9 is connected.
[0022]
A lid member 10 of the case 5 is put on the six unit cells 4. That is, the lid member 10 is opened on the lower surface thereof, and six fitting recesses 11 are provided in three rows in two rows, and the upper part of each unit cell 4 is fitted in these fitting recesses 11. Further, the cover member 10 is provided with holes 12 through which the positive output taper terminal 9 and the negative output taper terminal 9 penetrate, and the taper terminals 9 are fitted into the cover member 10 of the case 5 corresponding to the holes 12. A cylindrical fitting tube portion 13 that is tightened is integrally provided. The fitting cylinder portion 13 is provided with a split portion 14 that divides a part of the circumferential direction thereof.
[0023]
The bottom member 6 and the lid member 10 of the case 5 are fastened by screwing bolts 17 through bolt holes 15 and 16 provided in the case 5 and screwing nuts (not shown).
[0024]
When the taper terminal 9 is tightened by the fitting tube portion 13 provided on the lid member 10 of the case 5 as described above, connection work can be performed while preventing the taper terminal 9 from being deformed when the connection fitting is connected. .
[0025]
FIG. 7 is a plan view of a second example of the assembled battery according to the present invention in a state in which the fitting cylindrical portion of the case is fitted to the tapered terminal.
[0026]
In the assembled battery of this example, the fitting cylinder portion 13 is provided with a screw 18 that is screwed in a radial direction with a thick portion in the circumferential direction to tighten the tapered terminal 9.
[0027]
If it becomes like this, the holding | grip of the taper terminal 9 by the fitting cylinder part 13 will become reliable.
[0028]
FIG. 8 is a plan view of a third example of the assembled battery according to the present invention in a state in which the fitting cylindrical portion of the case is fitted to the tapered terminal.
[0029]
In the assembled battery of this example, the fitting cylinder part 13 is provided with a split part 14 that divides a part in the circumferential direction, and the fastening cylinder 19 is provided on the outer periphery of the fitting cylinder part 13 to fasten it to the taper terminal 9. ing.
[0030]
Even if it becomes like this, the holding | grip of the taper terminal 9 by the fitting cylinder part 13 will become reliable.
[0031]
【The invention's effect】
In the assembled battery according to the present invention, the case is provided with holes through which the positive output taper terminal and the negative output taper terminal pass, and the case has a fitting tube portion that fits and tightens the taper terminal in the case corresponding to each hole. Since it is provided integrally, the taper terminal can be tightened by the fitting tube portion provided in this case, and the connection work can be performed while preventing the taper terminal from being deformed when the connection fitting is connected.
[0032]
In this case, if the fitting tube portion is provided with a screw that is screwed in the radial direction to the thick wall portion in the circumferential direction to tighten the taper terminal, the fitting tube portion surely holds the taper terminal.
[0033]
Moreover, even if the fitting cylinder part is provided with a screw that is screwed in the radial direction to the thick part in the circumferential direction and tightens the taper terminal, the fitting cylinder part can surely hold the taper terminal.
[Brief description of the drawings]
FIG. 1 is a side view of an example of a unit cell used in a first example of an embodiment of an assembled battery according to the present invention.
FIGS. 2A to 2B are a plan view, a side view, and a bottom view of a bottom member of a case used in a first example of an embodiment of an assembled battery according to the present invention.
FIG. 3 is a plan view of a state in which each unit cell is incorporated in the bottom member of the case of this example.
4A and 4B are a plan view and a side view of a tapered terminal used in this example. FIG.
FIGS. 5A to 5C are a plan view, a side view, and a bottom view of a lid member of a case used in this example.
FIGS. 6A and 6B are a plan view of a state where a fitting tube portion of a case is fitted to a tapered terminal in this example, and a vertical cross-sectional view of a main part of the assembled battery of this example.
FIG. 7 is a plan view showing a state in which the fitting tube portion of the case is fitted to the tapered terminal in the second example of the embodiment of the assembled battery according to the present invention.
FIG. 8 is a plan view of a third example of the assembled battery according to the present invention in a state in which the fitting cylindrical portion of the case is fitted to the tapered terminal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery case 2 Upper cover 3a Positive terminal 3b Negative terminal 4 Cell 5 Case 6 Bottom member 7 Insertion recessed part 8 Connection metal fitting 9 Tapered terminal 9a Tapered part 9b Column part 9c Terminal part 9d Terminal through-hole 10 Cover member 11 Insertion recessed part 12 Hole 13 Fitting cylinder 14 Split part 15 Bolt through hole 16 Bolt through hole 17 Bolt 18 Screw 19 Tightening band

Claims (3)

A battery pack in which a plurality of unit cells are housed in a case, the unit cells are electrically connected to each other, and a positive output tapered terminal and a negative output tapered terminal are provided at both ends of the connected unit cells. Because
The case is provided with holes through which the positive output taper terminal and the negative output taper terminal penetrate, and a fitting tube portion for fitting and tightening the taper terminal is integrally formed in the case corresponding to each hole. An assembled battery characterized by being provided. 2. The assembled battery according to claim 1, wherein the fitting cylindrical portion is provided with a screw that is screwed in a radial direction with a thick portion in a circumferential direction thereof to fasten the tapered terminal. The fitting cylinder part is provided with a split part that divides a part in a circumferential direction thereof, and an outer periphery of the fitting cylinder part is provided with a tightening band that fastens this to the taper terminal. 1. The assembled battery according to 1.

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