JP3915919B2 - Assembled battery - Google Patents

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]
In lead-acid batteries , lead powder that is partially oxidized lead, water, and dilute sulfuric acid are the main components, and additives are added and kneaded as necessary, and the resulting paste is cast into a grid In addition, pasted electrode plates coated on a continuous porous lattice and dried are widely used. This electrode plate is further combined with a separator (separator plate) to form an electrode plate group, and after being incorporated in the battery case, it is chemically charged by adding dilute sulfuric acid, or by being incorporated in the battery case after chemical charge, 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 set of six batteries in which six cells are 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]
The present invention includes a bottom member (6) provided with a plurality of fitting recesses (7) for fitting the cells on the upper surface and a plurality of fitting recesses (11) for fitting the cells on the lower surface. The lower portions are respectively fitted into the individually provided lid members (10) and the plurality of fitting recesses (7) of the bottom member (6), and the upper portions are respectively fitted to the plurality of fitting recesses (11) of the lid member (10). A plurality of unit cells electrically connected in series with each other, and a plurality of bolts (17, 16) provided in the bottom member and the lid member, respectively. ) And a nut screwed to each bolt, the bottom member and the lid member are fastened, and a positive output terminal as an assembled battery is connected to each of two unit cells located at both ends of a series circuit of the plurality of unit cells, and Positive that constitutes the negative output terminal Target assembled battery power tapered terminal 9 and the negative output taper pin (9) is provided.
[0012]
In the assembled battery according to the present invention, the lid member (10) is provided with holes (12) through which the positive output taper terminal (9) and the negative output taper terminal (9) respectively penetrate, and each taper terminal (9) is fitted. The fitting tube portion (13) to be tightened is integrally provided on the lid member (10) corresponding to each hole (12).
[0013]
When the taper terminal is tightened by the fitting tube portion provided in the case in this manner, the connection work can be performed while preventing the taper terminal from being deformed when the connection fitting is connected to the taper terminal.
[0014]
In this case, the screw (18) is screwed into the thick part extending along the circumferential direction of the fitting cylinder part along the radial direction of the fitting cylinder part, and the taper terminal (9) is tightened by the screw. It is preferable. If comprised in this way, the holding | grip of the taper terminal by a fitting cylinder part can be ensured.
[0015]
Moreover, the fitting cylinder part (13) is provided with a split part (14) that divides a part in the circumferential direction, and the fitting cylinder part is fastened to the tapered terminal on the outer periphery of the fitting cylinder part (13). A clamping band (19) is preferably provided.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 6A and 6B show a first example of the embodiment of the assembled battery of the present invention. FIG. 1 is a side view of an example of a unit cell used in this example. ) 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.
[0017]
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.
[0018]
In producing the negative electrode plate, 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 are kneaded. A negative electrode active material paste was prepared, and 240.0 g of the negative electrode active material paste was filled in a current collector made of a lattice, and then left to mature for 18 hours in a temperature of 50 ° C. and a humidity of 95%, and then a temperature of 25 ° C. , for 2 hours in a humidity of 40% and dried to prepare a unformed negative electrode plate.
[0019]
In producing the positive electrode plate, a kneading pot that can be cooled was used to keep the temperature constant during the kneading. And 0.01 mass% sodium sulfate and cut fiber are added with respect to lead powder, 13 mass% dilute sulfuric acid (specific gravity 1.26: 20 degreeC) with respect to this lead powder, and with respect to this lead powder Then, 12% by mass of water was kneaded to prepare a positive electrode active material paste. 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.
[0020]
It was obtained electrode plate group Thus unformed negative electrode plate was produced and unformed positive electrode plate spirally wound with a separator made of glass fiber.
[0021]
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 electrolytic solution. The obtained unformed battery was formed at 5.0 A for 23 hours to obtain a single battery 4.
[0022]
A case 5 that accommodates the unit cell 4 includes a bottom member 6 shown in FIGS. 2A to 2C and a lid member 10 shown in FIGS. 5A to 5C. The bottom member 6 shown in FIGS. 2 (A) to 2 (C) is provided with a total of six fitting recesses 7 opened on the top surface, three in two rows, and each fitting recess 7 is shown in FIG. The lower part of the unit cell 4 is fitted into the battery, and a total of six unit cells 4 are set vertically. 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. A positive output terminal and a negative output terminal as an assembled battery are respectively formed on one negative terminal 3b and the other positive terminal 3a of two unit cells located at both ends of a series circuit of six unit cells 4 connected in series. The taper terminal 9 is connected. As shown in FIGS. 4A and 4B, the tapered terminal 9 includes a truncated cone-shaped tapered portion 9a, a columnar column portion 9b continuously provided at a lower portion of the tapered portion, and a lower portion of the column portion 9b. And a plate-like portion 9c provided in a direction orthogonal to the columnar portion. The plate-like portion 9c is provided with a terminal through hole 9d. Terminal through-holes 9d of the respective taper terminals 9 are formed in one negative terminal 3b and the other positive terminal 3a of two unit cells 4 and 4 located at both ends of a unit cell group composed of six unit cells connected in series. The negative output taper terminal 9 and the positive output taper terminal 9 constituting the negative output terminal and the positive output terminal as an assembled battery are respectively fastened by fastening a nut (not shown) that is fitted and screwed into the negative terminal 3b and the positive terminal 3a. Each is connected to the corresponding negative terminal 3b and positive terminal 3a.
[0023]
A lid member 10 of the case 5 is put on the six unit cells 4 . The lid member 10 has three each in two rows are opened total of six fitting concave portion 11 is provided on its lower surface, and the upper portion of the unit cell 4 is fitted into each of these fitting concave portion 11. The lid 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 lid 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.
[0024]
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).
[0025]
When the taper terminal 9 is tightened by the fitting tube portion 13 provided on the lid member 10 of the case 5 in this way, the connection is made while preventing the taper terminal 9 from being deformed when the connection fitting is connected to each taper terminal. Work can be done.
[0026]
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.
[0027]
In the assembled battery of this example , a screw 18 is screwed into a thick portion extending in the circumferential direction of the fitting tube portion 13 along the radial direction of the fitting tube portion 13 , and the taper terminal 9 is tightened by this screw. It has been.
[0028]
If comprised in this way, the holding | grip of the taper terminal 9 by the fitting cylinder part 13 can be ensured.
[0029]
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.
[0030]
In the assembled battery of this example, a split portion 14 is provided that divides a part of the fitting tube portion 13 in the circumferential direction, and a fastening band that fastens the fitting tube portion to the taper terminal 9 on the outer periphery of the fitting tube portion 13. 19 is provided .
[0031]
Also when comprised in this way, the holding | grip of the taper terminal 9 by the fitting cylinder part 13 can be ensured.
[0032]
【The invention's effect】
In the battery pack according to the present invention, the lid member that covers the upper part of the unit cell is provided with holes through which the positive output taper terminal and the negative output taper terminal respectively penetrate, and the fitting cylinder portion that fits and tightens the taper terminal corresponds to each hole. And since it provided in the case integrally, when connecting a connection metal fitting to each taper terminal, a connection operation | work can be performed, preventing a taper terminal deform | transforming.
[0033]
According to the invention described in claim 2, a screw is screwed into the thick part extending along the circumferential direction of the fitting cylinder part along the radial direction of the fitting cylinder part, and the taper terminal is formed by this screw. As a result, the taper terminal can be reliably held by the fitting tube portion .
[0034]
According to the invention described in claim 3, a split portion that divides a part of the fitting tube portion in the circumferential direction is provided, and tightening is performed to tighten the fitting tube portion to the tapered terminal on the outer periphery of the fitting tube portion. Since the band is provided, the taper terminal can be reliably held by the fitting tube portion.
[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.
[4] (A), (B) are a plan view and a side view of a tapered pin used in this embodiment.
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, respectively .
6 (A) and (B) is an essential part longitudinal cross sectional view of the assembled battery of the plan and the present embodiment in the state fitted to the fitting tubular portion of the case to the tapered pin in the present embodiment, respectively.
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 invention.
FIG. 8 is a plan view of a third example of an assembled battery according to the present invention in a state where a fitting tube portion of a case is fitted to a tapered terminal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery case 2 Top 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 Plate-shaped part 9d Terminal through-hole 10 Cover member 11 Insertion recessed part 12 Hole 13 Fitting cylinder part 14 Split part 15 Bolt through hole 16 Bolt through hole 17 Bolt 18 Screw 19 Tightening band

Claims (3)

A bottom member (6) in which a plurality of fitting recesses (7) for fitting the cells are opened on the upper surface and a plurality of fitting recesses (11) for fitting the cells are provided in the lower surface. The lower part is fitted into the lid member (10) and the plurality of fitting recesses (7) of the bottom member (6), and the upper part is fitted into the plurality of fitting recesses (11) of the lid member (10). A plurality of unit cells electrically connected in series, and a plurality of bolts (17) and bolts passed through bolt through holes (15, 16) respectively provided in the bottom member and the lid member. The bottom member and the lid member are fastened by nuts screwed to each other, and a positive output terminal and a negative output terminal as assembled batteries are respectively provided to two unit cells positioned at both ends of the series circuit of the plurality of unit cells. Constructing positive output taper In a battery pack child 9 and the negative output taper pin (9) is provided,
The lid member (10) is provided with holes (12) through which the positive output taper terminal (9) and the negative output taper terminal (9) respectively penetrate.
A fitting tube portion (13) for fitting and tightening each tapered terminal (9) is provided integrally with the lid member (10) corresponding to each hole (12);
A battery pack characterized by. A screw (18) is screwed into the thick portion extending along the circumferential direction of the fitting tube portion (13) along the radial direction of the fitting tube portion, and the taper terminal (9) is screwed by the screw. The assembled battery according to claim 1, wherein the battery pack is tightened . The fitting cylinder part (13) is provided with a split part (14) that divides a part in the circumferential direction, and the fitting cylinder part is provided on the outer periphery of the fitting cylinder part (13) with the tapered terminal. The assembled battery according to claim 1, further comprising a fastening band (19) for fastening to the battery.

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