JP4123591B2 - Unit battery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembled battery comprising a plurality of cylindrical unit cells.
[0002]
[Prior art]
Generally, a cylindrical battery is provided with a positive electrode terminal and a negative electrode terminal at both ends of a cylindrical shape. By sandwiching the positive electrode terminal and the negative electrode terminal from both side surfaces, a plurality of cylindrical batteries are integrated into a unit battery, and the conventional unit battery is such that a line connecting the center of the diameter of the unit cell forms a square. Had been placed. (Japanese Patent Laid-Open No. 9-266016)
In addition, the connection terminal that connects them was connected with a detachable connector or an outlet type. In addition, the output terminals that connect the unit cells having such a structure are not connected to the entire assembled battery in which a plurality of unit cells are incorporated, but are connected by means similar to those used to connect the connection terminals. It was only.
[0003]
[Problems to be solved by the invention]
However, in the configuration as described above, the gap between the unit cells generated when a plurality of cylindrical unit cells are collected is widened, and the volume of the entire assembled battery is increased. However, the gap between the single cells needs to be appropriately provided in order to absorb the heat generated from the cells.
[0004]
Further, it is desirable that the gap be as uniform as possible when the refrigerant is cooled through the gap. However, in the configuration as described above, the gap can only be cooled nonuniformly.
[0005]
On the other hand, when connected with a connector or outlet type, each unit cell must be connected to the connection terminal separately, and the workability is only poor because the interval between cells is not constant. In addition, there was a risk of erroneous connection.
[0006]
An object of the present invention is to solve such a conventional problem, and to improve workability at the same time as making the cooling performance of a unit cell uniform.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a plurality of cylindrical unit cells are arranged in a stacked structure, and both ends of these unit cells are connected by a case. In this case, stacking means that cylindrical cells are arranged in a linear row in the radial direction, and the rows are stacked in the same direction across a plurality of stages, and provided between the cells in a row. It is arranged so that the center of the cylindrical unit cells constituting another row is located immediately above the set interval. In addition, the case is provided with a hole to which the terminal of each unit cell can be fitted when the unit cell is a module. At the same time as positioning the unit cell in the module, adjacent modules are equidistant from each other. Can be connected.
[0008]
By uniformly disposing the distance to the surrounding single cells with respect to one single cell, it is possible to make the size constant by adding a gap to the radius of the single cell. The number of unit cells stacked in the unit cell is preferably two, and the first and second stages are shifted by a half pitch. Due to this shift, the intervals between the unit cells when the unit cells are continuously arranged become uniform.
[0009]
The unit cells are arranged not only within the unit cells but also between the unit cells so as to maintain a uniform gap as a whole, absorb the heat generated by the unit cells, and create a uniform refrigerant flow throughout the unit cells. Efficient cooling is realized.
[0010]
The unit cells are configured without waste in the arrangement of the unit cells, and even when a plurality of unit cells are connected, a useless space is not formed in the connecting portion. In other words, the volume including the cooling space per unit cell is the same for the assembled battery in which one unit cell module and a plurality of unit cells are connected. Thus, the volume occupied by each unit cell is a connection with a high volumetric efficiency as a whole.
[0011]
In addition, since the output terminal is preferably at a position lower than both side surfaces of the case, it is possible to prevent a metal plate or the like from coming into contact with the output terminal, or contact even if the output terminals of the unit cells face each other. Can do.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
As shown in FIG. 1, a plurality of cylindrical unit cells 1 are arranged in a stacked structure. The arrangement of this stacking structure is such that the distance g (gap) to the surrounding single cells is uniformly arranged with respect to one single cell 1 so that the gap g is added to the outer shape D of the single cells. Place in dimension D + g. The number of unit cells 1 in the unit cell, for example, 8 is an even number of 4 × 2 in 2 stages, and the first stage 4 and the second stage 4 are shifted by a half pitch (D + g) / 2. Due to this deviation, the unit cell pitch D + g becomes uniform when the unit cells are continued. Next, as shown in FIG. 2, cases 3 and 4 for connecting and holding both end portions 2 of the unit cell 1 are fixed, and connection terminals 5 and 6 provided at both end units 2 of the unit cell 1 are The cases 3 and 4 are penetrated. Next, as shown in FIG. 3, the connection body 7 is inserted between the connection terminals 5 and 6 of the unit cell 1, and is fastened and fixed to the connection terminals 5 and 6 with a tightening nut 8.
[0014]
A case in which the connecting terminals 5 and 6 of the unit cell 1 are connected to each other so that both ends 2 of the unit cell 1 are connected and held to each other is fixed, and the cases 3 and 4 are connected to each other by a connecting rod 9. The unit battery 10 is used. The output terminals 5a and 6a of the unit battery 10 are shared with the connection terminals 5 and 6 of the unit cell 1.
[0015]
The unit battery 10 configured as described above has a unit cell connection pitch D + g, and the connection pitch between the unit cells and the output terminals of the unit cells is also substantially the same as the connection pitch as D + g.
[0016]
Next, as shown in FIG. 4, the connection body 7 that extends between the connection terminals 5 and 6 of the unit cell 1 is covered with covers 11 and 12. The front ends 5b and 6b of the output terminals 5a and 6a of the unit battery 10 are prevented from protruding outward from both side surfaces of the covers 11 and 12.
[0017]
As shown in FIG. 5 and FIG. 6, the baffle plate portion 13 from the cases 3, 4 is substantially parallel or orthogonal to the connection body 7 that extends between the connection terminals 5, 6 provided at both end portions 2 of the unit cell 1. And the connecting direction in which the single cells of the connection body 7 thrive are regulated by the baffle plate portions 13, 14, 15. The shapes of the left and right cases 3 and 4 for connecting eight unit cells are different as shown in FIGS.
[0018]
FIG. 7 shows an attachment structure for the covers 11 and 12 to be attached to the cases 3 and 4. Reference numerals 16 and 17 denote ribs provided along the portions of the cases 3 and 4 that are fitted to the covers 11 and 12, and along the edge 18 of the covers 11 and 12, the relatively low ribs 16 and A relatively high rib 17 is disposed along the edge 18 of the covers 11 and 12 on the inner periphery thereof. Since the ribs 16 and 17 are provided in the case, the mountability of the cover and the external impact holding force are greatly improved. The ribs 16 and 17 and the edge of the cover are fitted to each other to form a drip-proof structure. Reference numeral 19 denotes insert nuts for mounting the covers 11 and 12 which are insert-molded in the cases 3 and 4. The bolts 21 are inserted into the mounting holes 20 provided in the covers 11 and 12, respectively, and tightened to the cases 3 and 4. Fixed.
[0019]
FIG. 8 shows an attachment structure of the connecting rod 9 and the covers 11 and 12 that connect the cases 3 and 4. A fixing portion 21 of the connecting rod 9 is provided at each corner portion of the cases 3 and 4, the connecting rod 9 abuts on one side of the fixing portion 21, and the cases 3 and 4 of the covers 11 and 12 are on the other side. A mounting boss 22 provided corresponding to the fixed portion 21 is abutted or fitted, and is screwed into a screw hole 24 at the tip of the connecting rod 9 through a connecting bolt 23 passing therethrough. The connecting rod 9 is formed in a D-cut shape or a polygonal shape, and a fixing portion is provided on the contact surface of the fixing portion 21 of the cases 3 and 4 so as to correspond to the shape of the connecting rod 9 so that the connecting rod 9 can be rotated together. A means to prevent it can be made.
[0020]
FIG. 9 shows that a plurality of cells 1 are arranged in a stacked structure, and cases 3 and 4 for connecting and holding both ends 2 of the cells 1 are fixed to each other, and the terminals of the cells 1 described above are fixed. The case 3 of the unit battery 10 between 5 and 6 has a recess 25 formed in the approximate center of the two unit cells 1 on the upper surface of the case 3, and a battery fixing fitting 26 is fitted in a shape corresponding to the recess 25. The unit battery 10 is fixed. The fixing bracket 26 can be attached to each module of the unit battery 10 one set or two or more sets by adding a large number of the depressions 25 described above. By connecting the adjacent terminals of the adjacent unit batteries with the connecting body 7 and the fastening nut 8 as shown in the figure, the assembled battery can be used for a higher output.
[0021]
The fixing bracket 26 is a little longer than the length of the assembled battery 10 so as to straddle the assembled battery 10, and the fastening bolts 27 are attached to both ends thereof to be fastened and fixed to the floor surface, or the adjacent assembled batteries 10 are simultaneously fixed. The bridge is bridged with one fixing bracket 26 and fixed together.
[0022]
【The invention's effect】
As described above, according to the present invention, it was possible to save the capacity by arranging the cells in a stack. In addition, even if a plurality of unit batteries are connected as an assembled battery, since the connection distance of the unit cells is the same, there is little loss due to connection, and the connection terminals of the unit cells and the output terminal of the assembled battery can be shared, so the battery The storage structure can be simplified, and the connection resistance as an assembled battery is reduced.
[0023]
On the other hand, it is possible to greatly prevent erroneous connection when unit cells are connected to form unit cells, so that not only safety but also workability is dramatically improved. In addition, since the central portion between the single cells is recessed and tightened with a fixing bracket having a shape along the outer shape of the single cells, the tightening force is distributed to each single cell, and a stable mounting state is obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a stacking structure of unit cells of the present invention. FIG. 2 is a diagram showing a configuration in which both ends of a unit cell of the present invention are held by a case. FIG. FIG. 4 is a perspective view of a unit battery of the present invention. FIG. 5 is a front view of case 3 of the present invention. FIG. 6 is a front view of case 4 of the present invention. FIG. 8 is an enlarged partial sectional view of the unit battery of the present invention. FIG. 9 is a perspective view showing a partially assembled state of the assembled battery of the present invention.
DESCRIPTION OF SYMBOLS 1 Single cell 2 Both ends 3 of a single cell 4, 4 Case 5, 6 Connection terminal 5a, 6a Output terminal 7 Connection body 8 Tightening nut 9 Connecting rod 10 Assembly battery

Claims (1)

A unit cell in which a plurality of cylindrical unit cells are arranged in a stacked structure in which the distance between adjacent connection terminals is substantially the same, and a case for connecting and holding both ends of these unit cells is fixed. Connection terminals provided at both ends of the battery pass through the case, the connection terminals are connected to each other on the opposite side of the case from the unit cell, and a baffle plate portion is provided on the case. parts are projected from the connection terminals extending through the casing, the unit cell and unit cells recess fasteners fitted to said lock down the unit cell between the unit cells.

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