KR100739841B1 - Size-fixed unit cell battery for non-enlarging - Google Patents

Abstract

Provided is a battery including size-fixed unit cells, which causes no change in size, prevents degradation of electrical properties, and shows improved lifespan and quality. The battery including size-fixed unit cells are obtained by the method comprising the steps of: applying a first end plate(121) having coupling grooves(121h) to both opposite surfaces at a first side of a plurality of electrode plates(110) stacked and aligned successively; applying a second end plate(122) having coupling jaws(122r) to both opposite surfaces at a second side of the electrode plates(110); inserting the coupling jaws into the coupling grooves to fix the electrode plates under pressure and to form a fixed unit cell(10u); and introducing at least one fixed unit cell into a casing to form a battery.

Description

Size-fixed unit cell battery for non-enlarging

1 to 3; A diagram for describing the structure of a size fixed unit cell battery according to embodiments of the present invention.

4; Figures 2 and 3 for explaining examples of the cross-sectional shape of the end plate in the embodiment.

5 is a view for explaining the structure of a conventional paste-type cell battery.

<Description of Symbols for Major Parts of Drawings>

10: battery

10u: fixed unit cell

110: plate group

120, 121, 122, 124: end plate

130: fixing band 140: fastening bolt

150 electrode 160 case

50: battery

50u: unit cell

510: plate group 520: implants

530: fixed band

The present invention relates to a secondary battery, in detail, to form a fixed unit cell by pressing a plurality of groups of electrode plates and to configure a battery using the fixed unit cell, or by connecting a plurality of in series or in parallel to a high voltage / The present invention provides a fixed size unit cell battery in which a high capacity battery is formed.

Secondary batteries are rechargeable batteries, and according to the development of technology, secondary batteries of various sizes are required for use in various devices, and nickel-hydrogen (Ni-MH) batteries, Ni-Cd batteries, and lithium Ion (Li-ion) batteries and the like are typical, and are also classified into sintered, paste, pocket, etc. according to the manufacturing method of the electrode plate.

In the case of nickel metal hydride (Ni-MH) cells, the cadmium negative electrode of the Ni-Cd battery is replaced with a metal hydride (MH) electrode, which is twice the energy of the Ni-Cd battery. It has a density, fast charging and discharging, and can be used in a relatively wide temperature range.

Important factors in the design of nickel-hydrogen (Ni-MH) batteries vary greatly by the electrode manufacturing process, the amount of electrolyte, the ratio of cathode and anode capacities, gas release pressure, and adhesion between electrodes.

Among these factors, adhesion between electrodes is a factor that greatly affects battery performance.If adhesion between electrodes falls, local temperature deviation may occur during charging and discharging, and an imbalance may be reached due to voltage drop. The hydrogen absorption and release efficiency of the alloy is lowered. In general, a nickel-hydrogen (Ni-MH) battery is a paste electrode plate method prepared by coating and drying the electrode active material in the form of a paste on the substrate. In addition, in a method of constructing a battery using at least one unit cell, in the case of a nickel-metal hydride (Ni-MH) battery, hydrogen used in an electrode as compared to a lithium ion (Li-ion) battery or a Ni-Cd battery is used. When the occlusion alloy is charged and discharged, a sudden volume change occurs.

Therefore, if the means for preventing the expansion due to such a volume change factor, the adhesion between the positive and negative plates decreases, the electrical characteristics, etc., and the hydrogen absorption and discharge efficiency is lowered, resulting in a decrease in battery performance. There is a problem that it is very difficult to use as a battery.

Therefore, in order to compensate for this problem, the unit cell is generally placed in a battery case, and after assembly of the battery, a method of increasing the adhesion between the electrodes to increase the strength outside the battery case and the iron or the less deformation By using ancillary parts made of metal such as SUS or general purpose plastic, a method of maintaining adhesion between electrodes is used.

5 is a view for explaining the structure of a conventional paste-type cell battery.

In the conventional battery 50, as shown in the drawing, a plurality of unit cells 50u to be aligned and formed into a battery are inserted into a case, and the implant 520 is padded on the outermost sides of both sides of the case. Next, by fixing the outside with the fixing band 530, by preventing the volume change of the completed battery 50, and by drawing the electrode here to complete the secondary battery, thereby preventing the performance degradation of the battery 50 Is taking.

However, such a design is not enough to prevent volume expansion, and due to ancillary parts installed outside the battery case, the weight and size of the entire battery are increased, so that the battery has the same volume and weight / capacity. There are many problems in realizing a lightweight and compact battery design at the time of design.

In addition, in the case of the conventional secondary battery, the conventional method of preventing the volume expansion between the electrodes outside the battery case, if used for some time, each unit constituting the unit cell (50u) according to the charge and discharge of the secondary battery As the process of contracting or expanding the electrode plate group 510 is repeatedly performed, a deformation of the size of the initial unit cell 50u occurs in the battery case, and the efficiency of each of the numerous electrode plate groups 510 is increased. The drawback, the disadvantage of not exhibiting the battery performance when deformation and breakage of the external implant to prevent volume change and the shape of the external implant and the weight of the implant does not improve the overall battery design and weight loss part.

Accordingly, an object of the present invention for solving the above problems is to form a fixed unit cell by pressing and fixing each unit cell constituting the battery, and to form a unit cell by using the fixed unit cells fixed as described above It is to provide a fixed size unit cell battery, which can fundamentally prevent expansion of the plate groups.

In addition, the present invention by directly pressing and fixing the electrode plate group unit cells in which a plurality of negative and positive electrode plates are overlapped, thereby preventing the volume expansion of the unit cells generated during charging and discharging, to increase the adhesion between the electrodes to improve the performance of the battery, It is intended to provide a lighter and more compact battery than a conventional battery even when a large capacity battery is configured by connecting several unit cells in series or in parallel.

Size fixed unit cell battery of the present invention for achieving the above object,

An end plate is attached to the outer end of the plurality of electrode plate groups arranged in a stacked form and pressed to form a fixed unit cell, and at least one fixed unit cell is aligned and fixed to form a battery. .

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

As described above, the size-fixed unit cell battery of the present invention is fixed in size from the unit cell in order to solve the problem that the conventional battery can not realize the compact design and weight loss due to the increase in the adhesion of the electrode and the external implant. The main focus is to ensure that the size of the battery does not change even in the final finished state.

In general, a unit cell is used to form a secondary battery. That is, the electrode plate group is formed of a positive electrode plate (+ electrode plate), an insulating paper, and a negative electrode plate (-pole plate), and a plurality of the electrode plate groups are stacked to form a unit cell.

In the present invention, unlike a conventional unit cell in which only a plurality of electrode plate groups are formed by stacking, a plurality of electrode plate groups stacked in a stack form a unit cell (fixed unit cell) by pressing and fixing from the outside.

In addition, in general, the secondary battery is formed by using one or a plurality of unit cells. In the present invention, the battery is formed by one or a plurality of fixed unit cells fixed from the unit cell structure.

1 is a view for explaining the structure of a fixed size unit cell battery according to an embodiment of the present invention, (a) is a front view, (b) is a side view.

As shown, in the fixed size unit cell battery 10 of the present embodiment, the electrode plate group 110 is formed of an electrode plate and an insulating paper structure, such as the first positive electrode plate 111 and the insulating paper 110s or the negative electrode plate 112 and the insulating paper 110s. ), And in the pressurized state after laminating a large number of such electrode plates 110 densely, the end plate 120 is padded on the outermost side of the aligned electrode plates 110 and then fixed band 130 having a predetermined width. ) And fixed firmly to form a fixed unit cell 10u.

As shown in FIG. 1, in the formation of each electrode plate group 110, the insulating paper 110s is formed larger than the electrode plate so that a short does not occur in the electrode plate group 110 itself, and the electrode plate groups 110 are fixed. End plate 120 of the portion to be fixed by the fixing band 130 is preferably formed so as to protrude a little so that the problem of the short due to the contact does not occur in the process.

In the present embodiment, the battery is finally completed by forming an electrode in one fixed unit cell 10u and placing it in a predetermined case 160.

As described above, it is possible to use as many unit cells as necessary to complete the battery. In the fixed unit cell battery of the present embodiment, as shown in FIG. 1, only one fixed unit cell 10u can form a battery, and a plurality of fixed unit cells 10u can form a battery.

Therefore, in addition to forming a battery with one fixed unit cell 10u as in the embodiment of FIG. 1, a plurality of fixed unit cells 10u are closely arranged to fix the outside thereof, and the respective fixed unit cells 10u may be fixed. It is also possible to complete the fixed size unit cell battery by connecting the electrodes and drawing the electrode from the outermost fixed unit cell 10u.

2 is a view for explaining the structure of a fixed size unit cell battery according to another embodiment of the present invention, (a), (b) is a plan view according to each embodiment, (c) is a perspective view It is shown.

In the fixed size unit cell battery of the present embodiment, the plurality of electrode plates 110 are closely stacked as in the embodiment of FIG. 1, but here, two end plates 121 and 122 are compressed using two end plates 121 and 122. There is a difference in fixing.

That is, as shown, the first end plate 121 is formed in the form with the coupling groove 121h at both ends, and the second end plate 122 is formed in the form with the coupling latch 122r at the end thereof. do.

In the present embodiment, the fixed unit cell 10u is pressed tightly and laminated in the state in which two second end plates 122 are hanged on the lower first end plate 121, and at the end, the auxiliary means assists this press situation. The first end plate 121 is inserted in the dry state to complete the fixed unit cell 10u.

2 (b) is the same as the principle of (a), but the sizes and positions of the first end plate 121 and the second end plate 122 are interchanged.

In addition, the end plates 121 and 122 may be formed in the form of one plate as a whole, but the central surface may not be entirely filled. In other words, if there is no effect on the pressing and fastening after fastening, it is also possible to dig into various shapes such as circular or square as shown in FIG.

3 is a view for explaining the structure of a fixed size unit cell battery according to another embodiment of the present invention.

As illustrated, in the fixed size unit cell battery 10 of the present embodiment, the end plates 124 may be engaged with each other, that is, the cross-section is formed in a 'c' shape as in the present embodiment, After pressing in the state of being engaged with each other to form a fixed unit cell (10u) by fastening by fastening with a fastening bolt 140 and the like, the difference from the above embodiments.

That is, in the present embodiment, the end plates 124 are engaged with each other so as to include a plurality of stacked electrode plate groups 110, and the fastening fastening fastening fastening 124r formed at the ends of the end plates 124 is fixed. As a result, the fixed unit cell 10u is formed. In addition, the fixed unit cells 10u thus formed are regularly arranged in a plurality of times, and the fixed unit cells 10u are fixed again, and then the electrode unit is drawn to complete the size fixed unit cell battery 10 as in the above-described embodiments.

In addition, in the present exemplary embodiment, the fixed unit cell 10u may be formed by changing the widths of the end plates 124 and the end plates 124 and the position thereof.

In addition, as shown in (c) of FIG. 3, as described in (c) of FIG. 2, if there is no influence on pressing and fastening, the end plates 124 are formed in various forms, and the fixed unit cell 10u of the present embodiment is used using the same. ), It is also possible to complete the fixed size unit cell battery 10.

4 is a view for explaining examples of the cross-sectional shape of the end plate in the embodiment of Figs.

Figure 4 (a) is an example of the end plate is formed of an uneven cross-sectional bumpy shape, Figure 4 (b) is an end plate formed with a plurality of pupils, and Figure 4 ( c) shows an end plate formed with a plurality of square grooves.

As described above, the end plate can be formed in various ways without being bound to its shape or shape if each unit cell can be fixed by compression.

Therefore, the present invention can prevent the size change of the unit cell and eventually prevent the performance degradation of the finished battery, and as described above, the end plate can be formed in various shapes and fastened in various ways, from small to medium to large. Regardless of the size of the battery to be formed, it can be carried out more variously based on the technical concept of the present invention.

As described above, the present invention prevents the size change of the finished cell by preventing the size change from the unit cell structure, and consequently, decreases the adhesion between the substrate and the electrode active material due to the volume change, thereby preventing hydrogen absorption and emission efficiency. Easily extends the lifespan of Ni-MH batteries and maintains performance for a long time, and achieves weight reduction and compact design of batteries when designing high voltage / high capacity battery configurations by connecting each unit cell. To provide the effect.

Claims (5)

delete delete A plurality of pole plate groups 110 in which a coupling groove 121h is formed on both end surfaces of the plurality of pole plate groups 110 arranged in a stacked form on opposite sides of the first outer side, and the plurality of pole plate groups 110 are formed. In the state where the second end plate 122 on which the fastening clasp 122r is formed is padded with both end surfaces corresponding to the second outer side of the second outer side, the second end plate ( By inserting the fastening latch 122r of 122, a plurality of pole plate groups 110 are pressed to form a fixed unit cell 10u, At least one fixed unit cell (10u) of the fixed fixed unit cell, characterized in that to form a battery by inserting into a case (case). delete The method of claim 3, The first end plate (121) and the second end plate (122) is a fixed size unit cell battery, characterized in that it comprises an empty space as a whole (plate) form.

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