KR20190143407A - Battery having multi electrode-lead and The battery module - Google Patents

Abstract

The present invention relates to a battery cell having multiple electrodes and a battery module using the same. According to the present invention, the battery module is formed only by connecting electrodes without having an extra bus bar, and in order to improve the degree of freedom in the connection, a positive terminal and a negative terminal are formed to be protruded to the outside in the battery cell. The battery cell having a plurality of electrode terminals is characterized in that any one or more selected from the positive terminal and the negative terminal are formed on both opposite sides, thereby forming various battery modules according to the layout of a vehicle.

Description

Battery cell having a plurality of electrodes and a battery module using the same {Battery having multi electrode-lead and The battery module}

The present invention relates to a battery cell having a plurality of electrodes and a battery module using the same, and more particularly, to a battery module having a plurality of electrodes formed at both ends of the secondary battery.

In recent years, secondary batteries capable of charging and discharging have been proposed as solutions for air pollution of conventional gasoline and diesel vehicles using fossil fuels, including electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-ins. It is also attracting attention as a power source for hybrid electric vehicles (P-HEV). Unlike small mobile devices, medium and large devices such as automobiles are used for medium and large battery modules in which a plurality of battery cells are connected according to the necessity of high output and large capacity, and in the case of configuring various devices by applying such medium and large battery modules, a unit battery module is used. The electrical connection structure between the two is an important factor to determine the application depending on the structure of the device. For example, mounting a plurality of battery packs in a limited space of an electric vehicle platform in consideration of the electrical connection structure may add additional components or change the structure of the battery module combination according to the positional characteristics of the electrode terminals of the battery modules. There was a problem that had to be done,

In addition, there is a problem in that it is often necessary to use a separate bus bar when the battery module is coupled in accordance with the constraints of the positions of the plus terminal and the minus terminal which are final terminals of the battery module. If the application of the bus bar is different depending on the device structure in which the battery module is mounted and applied, not only can the productivity of the battery module assembly be lowered, but also the operation performance or driving reliability of various devices to which the battery module is applied will be greatly affected. There was this. In addition, even in view of the recent trend that the application field of the secondary battery is diversifying day by day, the need to improve the design freedom by the electrical connection of the battery module is increasing.

Accordingly, in Korean Patent Publication No. 10-2014-0072689 (Battery Module Assembly, 2014.06.13.), A bus is applied to a battery module in which a pouch-type secondary battery having positive and negative terminals protruding on both sides is stacked. Terminal parts are formed at both ends of the bar, and the existing bus bar is improved to improve the degree of freedom in designing a plurality of battery modules. However, the above document does not solve the conventional problem of having a separate bus bar for connecting the positive electrode and the negative electrode when constructing a battery module using a secondary battery having electrodes formed on each side. In the case of a conventional battery module that connects electrodes through a busbar to form a module, a process such as welding according to the configuration of the busbar is additionally required, and the resistance of the busbar increases, thereby reducing the efficiency of the battery and improving quality. Difficulties in management arise.

In order to solve the above problems, Korean Patent Publication No. 10-2014-0058058 (Battery Module, 2014.05.14.) Is a plurality of only by connecting the electrodes cut by cutting the positive and negative tabs of the battery cell protruding to the outside. The stacked battery modules are connected. However, since the battery cell in the above literature has positive and negative tabs formed in only one direction, there is a limit in the expandability of connecting a plurality of unit modules, and a pair of incisions are made by cutting one positive and negative tabs. As a result, structural limitations have arisen in which electrodes with the same poles adjacent to each other have to be formed.

Such a conventional secondary battery has one positive or negative electrode formed on opposite sides, or a positive electrode and a negative electrode are formed on one side facing the same direction, so that the configuration of the battery module is limited when the cells are connected in parallel / parallel. There is a disadvantage that it is difficult to apply in a variety of configurations depending on the layout of the vehicle.

In addition, the recent high-efficiency high-capacity electric vehicle battery module requires a 2P12S module formed by connecting two cells in parallel and connecting a parallel set of 12SET cells connected in parallel with each other. Batteries in which electrodes are formed are stacked in one direction, and a pair of batteries connected in parallel are additionally configured to be connected to another pair of adjacent batteries in series. If the bus bar is further configured as described above, the resistance of unnecessary contact between the electrodes increases, causing a problem that the process quality of the battery module is deteriorated because the work efficiency of the energy efficiency of the battery module and the connection process between the cells cannot be achieved. It is becoming.

Korean Patent Publication No. 10-2014-0072689 (Battery Module Assembly, 2014.06.13.) Korean Patent Publication No. 10-2014-0058058 (Battery Module, 2014.05.14.)

The present invention has been made to solve the above problems, and does not have a separate bus bar constitutes a battery module by only connecting between electrodes, a battery cell having a plurality of electrodes to improve the degree of freedom between the connection and a battery module using the same To provide.

The present invention relates to a battery cell having a plurality of electrodes and a battery module using the same, and more particularly, to a battery cell in which an electrode terminal including a positive electrode terminal and a negative electrode terminal is protruded to the outside, wherein the battery cell is opposed to each other. It characterized in that a plurality of one or more electrode terminals selected from the positive terminal or the negative terminal is formed on both sides.

In addition, the battery cell may be formed adjacent to a plurality of positive or negative terminals having the same polarity to each other opposite sides.

In addition, it may include a battery cell having a plurality of electrode terminals, characterized in that the pair of positive and negative terminals having a different polarity on each opposite side is formed adjacent to each other.

In addition, the positive electrode terminal and the negative electrode terminal formed on both opposite sides may include a battery cell having a plurality of electrode terminals, characterized in that arranged to have different poles in the longitudinal direction of the battery cell.

In addition, the positive electrode terminal and the negative electrode terminal formed on opposite sides of the battery cell may include a battery cell having a plurality of electrode terminals, characterized in that arranged to have the same poles in the longitudinal direction of the battery cell.

In addition, a pair of positive and negative terminals having the same poles are formed adjacent to one side, and a plurality of pairs of positive and negative terminals having different poles are formed adjacent to the other side facing the one side. It may include a battery cell having an electrode terminal.

The present invention may further include a battery module formed by stacking two or more of the battery cells and electrically connecting a positive electrode terminal or a negative electrode terminal adjacent to the two or more battery cells. The battery may be a pouch type secondary battery.

In this case, the battery module has a plurality of the positive terminal or the negative terminal having the same polarity on each of the opposite sides are formed adjacent to each other, a plurality of battery cells connected in parallel to each other is configured in series, characterized in that do.

In addition, the battery module is a pair of the positive terminal or the negative terminal having the same polarity each other on both sides are formed adjacent to each other, a plurality of battery cells are connected in parallel to each other, the opposite sides respectively have different polarities A pair of prominent pairs of the positive electrode terminal and the negative electrode terminal are formed adjacent to each other, and the positive electrode terminal and the negative electrode terminal are arranged to have different poles in the longitudinal direction, and a plurality of battery cells connected in parallel to each other are connected in series.

In addition, the battery module is a pair of the positive terminal or the negative terminal having the same poles adjacent to one side is formed, and a pair of the positive terminal or the negative terminal having a different pole adjacent to the other side is formed is formed A plurality of battery cells connected in parallel to each other may be configured to be connected in series with each other.

In addition, the battery module is stacked on both sides of the battery cell and the battery cell in which the positive and negative terminals of the pair having the same polarity on both sides opposite to each other adjacent to each other in the front and rear direction is parallel to the battery cell A pair of positive and negative terminals having the same poles adjacent to one side, and a pair of the positive or negative terminals having different poles adjacent to the other side are formed. Including a battery cell, the battery cell and a pair of battery cells connected in parallel to each other are stacked in plurality are characterized in that connected in series.

In the battery cell of the present invention according to the above configuration, a plurality of electrodes are formed on opposite sides to improve the degree of freedom between the connection of the battery cells, so that various types of battery modules can be applied to the layout of the vehicle, thereby Direct / parallel connection is possible only by inter-connection, and high efficiency battery module can be developed by lowering the resistance value according to electrode connection by not forming a separate bus bar, and it is possible to make consistent work process of inter-cell connection process. The battery module process quality can be improved.

1 is a perspective view showing a battery cell according to the first-first embodiment of the present invention.
2 is an exploded perspective view showing a battery cell according to FIG.
3 is a perspective view showing a battery cell according to the embodiment 1-2 of the present invention.
4 is a perspective view showing a battery cell according to the embodiment 1-3 of the present invention.
5 is a perspective view showing a battery cell according to the embodiment 1-4 of the present invention.
6 is a perspective view showing a battery cell according to embodiment 1-5 of the present invention.
7 is a perspective view showing a battery module according to the embodiment 2-1 of the present invention.
8 is a schematic view showing a battery module according to embodiment 2-1 of the present invention.
9 is a perspective view showing a battery module according to the embodiment 2-2 of the present invention.
10 is a schematic view of a battery module according to embodiment 2-2 of the present invention.
11 is a perspective view showing a battery module according to the embodiment 2-3 of the present invention.
12 is a schematic diagram showing a battery module according to embodiment 2-3 of the present invention.
13 is a perspective view showing a battery module according to the embodiment 2-4 of the present invention.
14 and 15 are schematic views showing battery modules according to embodiments 2-4 of the present invention.
16 and 17 are exemplary views illustrating coupling between battery modules according to a second embodiment of the present invention.
18 to 21 is a view for explaining an aspect of the present invention connected between adjacent terminals using an external bus bar.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

When a component is said to be “connected” or “connected” to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in the middle. Should be.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.

The accompanying drawings are only examples to illustrate the technical idea of the present invention in more detail, and thus the technical idea of the present invention is not limited to the forms of the accompanying drawings.

Example 1 Battery Cell

<Example 1-1>

1 is a perspective view showing a battery cell 100 according to the first-first embodiment of the present invention, Figure 2 is an exploded perspective view of the battery cell 100 according to Figure 1, referring to Figures 1 and 2 The battery cell 100 may include a positive electrode terminal 110, a negative electrode terminal 120, an electrode assembly 130, and an outer case 140.

The electrode assembly 130 may be configured such that one or more positive electrode plates and negative electrode plates are disposed with a separator interposed therebetween, and one positive electrode plate and one negative electrode plate are wound together with the separator, or a plurality of positive electrode plates and a plurality of negative electrode plates. The separators may be divided into stacks stacked alternately with each other. In this case, the battery cell 100 may be formed of a primary battery or a secondary battery of a battery type or a pack type, preferably the positive electrode terminal 110 and the negative electrode terminal on both sides facing in the left and right direction in the form of a vertical direction. 120 may be formed as a pouch-type stacked secondary battery.

In addition, the outer case 140 may be configured to include an outer insulating layer, a metal layer, and an inner adhesive layer, and accommodate the internal components such as the electrode assembly 130 and the electrolyte. In this case, in order to improve the electrical and chemical properties of the electrode assembly 130 and the electrolyte and to improve heat dissipation, an aluminum-type metal thin film is interposed between the insulating layer and the inner adhesive layer, thereby stacking the electrode assembly 130. It is provided on both sides of the direction to accommodate the electrode assembly 130, the outer peripheral surface of the outer case 140 is provided with a sealing portion can seal the outer case 140, the electrode assembly 130 is accommodated. In addition, the exterior case 140 may be formed to protrude in a concave shape in at least one of the electrode assembly 130 in the stacking direction.

In addition, each electrode plate of the electrode assembly 130 is provided with an electrode tab, one or more electrode tabs are connected to each of the positive electrode plate and the negative electrode plate is interposed between the sealing portion of the outer case 140 is formed to protrude to the outside It may function as an electrode terminal of the battery cell 100. In addition, a plurality of electrode tabs 111 and 121 respectively connecting the positive electrode plate or the negative electrode plate are formed on one surface on which the electrode terminal of the electrode assembly 130 is formed, and the battery cell 100 has the outer case in a longitudinal direction. The positive electrode terminal 110 and the negative electrode terminal 120 protrudes to the outside of the 140, and any one or more selected from the positive electrode terminal 110 or the negative electrode terminal 120 may be formed in plural opposite sides. have.

More specifically, the battery cell 100 according to the embodiment 1-1 of the present invention has a positive electrode plate formed with a positive electrode tab adjacent to one side in the longitudinal direction and a negative electrode tab 121 adjacent to one side in the longitudinal direction. The negative electrode plates are stacked on each other, wherein the positive electrode tab 111 of the positive electrode plate and the negative electrode tab 121 of the negative electrode plate are stacked to face in directions opposite to each other in the longitudinal direction, and each pair has the same polarity. The positive electrode terminal 110 or the negative electrode terminal 120 is formed adjacent to form a pair of positive electrode terminal 110 on one side in the longitudinal direction and a pair of negative electrode terminal 120 on the other side to be formed Can be.

In addition, the battery cell 100 may be formed in a plurality of three or more of the positive electrode terminal 110 and the negative electrode terminal 120 on both sides of the opposite, if necessary, the battery cell 100 is laminated Unnecessary electrode terminals can be removed when designing the battery module, but a pair of electrode terminals 110 and 120 are formed on opposite sides, respectively, so that unnecessary electrode terminals are not formed when the battery cells 100 are connected. It is desirable to have a degree of freedom.

<Example 1-2>

FIG. 3 is a perspective view illustrating a battery cell 200 according to embodiment 1-2 of the present invention. As shown in FIG. 3, the battery cell 200 according to embodiment 1-2 of the present invention. A pair of the positive electrode terminal 210 and the negative electrode terminal 220 each having a different polarity on each opposite side is formed adjacent to each other, it is made of a form arranged to have the same pole on both sides facing in the longitudinal direction.

In this case, the battery cell 200 is a positive electrode plate and a negative electrode plate having a pair of electrode tabs formed on both sides facing in the longitudinal direction are stacked on each other, each of the positive electrode tab and the negative electrode tab formed on the positive electrode plate and the negative electrode plate in the stacking direction It may be stacked and formed so as not to interfere with each other.

<Example 1-3>

FIG. 4 is a perspective view illustrating a battery cell 300 according to the first to third embodiments of the present invention. Referring to FIG. 4, the battery cell 300 according to the first to third embodiments of the present invention is opposite. A pair of the positive electrode terminal 310 and the negative electrode terminal 320 having different polarities on each side are formed adjacent to each other, and are arranged to have different poles on both sides facing in the longitudinal direction of the battery cell 300. Can be.

In this case, the battery cell 300 is a positive electrode plate and a negative electrode plate is formed with a pair of electrode tabs facing each other in the corner direction to the rectangular electrode plate is stacked on each other, wherein the positive electrode tab and the negative electrode tab is stacked in the stacking direction It is preferable that they are arranged so as not to interfere with each other.

<Examples 1-4,1-5>

5 is a perspective view illustrating a battery cell 400 according to the first to fourth embodiments of the present invention, and FIG. 6 is a perspective view showing the battery cell 500 according to the first to fifth embodiments of the present invention. The battery cells 400 and 500 according to the embodiments 1-4 and 1-5 of the present invention have a pair of the positive electrode terminals 410 and 510 or the negative electrode terminals 420 and 520 having the same poles adjacent to one side thereof. And a pair of the positive electrode terminals 410 and 510 and the negative electrode terminals 420 and 520 having different poles adjacent to the other side opposite to the one side may be formed to constitute the battery cells 400 and 500. . In this case, the battery cells 400 and 500 are formed by stacking a plurality of electrode tabs on one electrode plate to form respective positive electrode terminals 410 and 510 or negative electrode terminals 420 and 520, or at least one electrode. The electrode tab of the electrode plate on which the tab is formed may be manufactured by being stacked to form a plurality of terminals through the arrangement in the direction in which the electrode tab protrudes.

In addition, as shown in FIG. 5, in the battery cell 400 according to the first to fourth embodiments, a pair of positive electrode terminals 410 are formed at one side thereof, and one positive electrode terminal is formed at the other side of the battery cell 400. 410 and one cathode terminal 420 are formed in a pair. The battery cell 400 according to the above-described configuration is provided with three positive electrode terminals 410, thereby increasing the degree of freedom of connection with other battery cells stacked adjacently.

In addition, as shown in FIG. 6, in the battery cell 500 according to the first to fifth embodiments, a pair of positive electrode terminals 520 are formed on one side in the longitudinal direction, and one positive electrode terminal on the opposite side of the battery cell 500. 510 and the negative electrode terminal 520 is formed to form a pair. In this case, the battery cell 500 according to the above-described configuration is provided with three negative electrode terminals 520, thereby increasing connection freedom with other battery cells stacked adjacently.

In addition, according to various embodiments of the present disclosure, a battery cell in which a plurality of electrode terminals are arranged may be stacked in plural and constitute a single unit module, and have various arrangements according to required specifications of each unit module. The battery cell may be used. In this case, the battery cell using the battery cell having a variety of directions or the arrangement of the electrode terminal according to the number and capacity of the battery cell required in the unit module is connected in series or parallel with an adjacent battery cell, the battery In the design of the module, there is an advantage of having a high degree of freedom to design the battery module according to the layout of the vehicle.

Example 2 Battery Module

Hereinafter, the battery modules 1000, 2000, 3000, and 4000 forming one module stacked using the battery cells 100, 200, 300, 400, and 500 according to various embodiments of the present disclosure will be described.

In addition, in the battery cell 100 according to the above configuration, as shown in FIG. 7, at least two or more battery cells 100 are stacked, and the positive electrode terminal 110 of the adjacent battery cell 100 is stacked. ) Or the negative electrode terminal 120 may be configured to the battery module 1000 is electrically connected. On the other hand, the electrode terminal of the battery cell 100 is formed on both sides in the left and right directions in a form perpendicular to the ground so that the wide surface of the battery cell 100 toward the front and rear, the battery cells stacked in the front and rear direction The direction of 100 is the y axis, the length direction of the left and right sides of the battery cell 100 is the x axis, and the height direction of the electrode terminals 110 and 120 is disposed adjacent to both left and right sides of the battery cell 100. Separate it by z axis.

Referring to FIG. 7, the battery module 1000 may be configured such that the battery cells 100 have a wide surface facing each other in the y-axis direction to form one battery module 1000. In this case, the battery module 1000 may be electrically connected to the positive terminal 110 or the negative terminal 120 to modularize the components of the various battery cells 100 in the same direction without using a separate bus bar. There is an advantage. In this case, the electrical connection between the positive electrode terminal 110 and the negative electrode terminal 120 is the other battery cell 100 is disposed adjacent to each of the electrode terminals (110, 120) as shown in FIG. The electrode terminals 110 and 120 of the contact may electrically connect each of the battery cells 100, and the terminals 110 and 120 contacted are protected by welding or surrounding the battery module 1000 (not shown). C) can be further provided to prevent unnecessary contact between the electrodes and damage from the outside.

According to the above configuration, the battery module 1000 of the present invention forms a plurality of electrode terminals 110 and 120 on opposite sides of the battery module 1000, and the shape of the battery module 1000 and the direction of the battery module 1000 are stacked in the design of the battery module 1000. , There is an advantage to improve the degree of freedom in the connection between the electrodes, compared to the square battery cells that must maintain a constant shape, the battery module 1000 of the present invention is made of a variety of pouch-type secondary battery of the shape, There is an advantage that can be configured in various forms according to the layout of the vehicle.

In addition, the battery module 1000 of the present invention is formed by forming a plurality of the positive electrode terminal 110 and the negative electrode terminal 120 in a direction opposite to each other, the battery electrode 100 in one direction is connected in series and parallel to the The battery module 1000 may be configured, and as shown in FIGS. 7 and 8, the battery electrodes 100 may be stacked in the x-axis direction to configure the battery module 1000 as necessary. In this case, the positive electrode terminal 110 or the negative electrode terminal 120 of the battery electrode 100 connected in the x-axis direction may be bent at a predetermined angle in a direction corresponding to each other in the y-axis direction, and the electrode terminal 110 may be connected thereto. The angle at which the 120 is bent is caused by the thickness of the electrode terminals 110 and 120 and the arrangement of the battery electrode 100.

In addition, the battery module 1000 according to the shape of the electrode terminal (110, 120) disposed in the battery cell 100, the positive electrode terminal 110 and the negative electrode terminal 120 formed on both sides of the battery cell 100. ) Is connected in series or in parallel to form the battery module 1000, according to the design conditions of the battery module 1000, the battery module according to various combinations of the battery cell 100 according to an embodiment of the present invention 1000 may be configured.

<Example 2-1>

Hereinafter, an embodiment of the present invention proposes a battery module for manufacturing a 2P12S module, which is formed by connecting two battery cells in parallel and a parallel set of 12 sets of cells connected in parallel with each other, which are required for a high-efficiency electric vehicle in recent years. do. In this case, the battery module may form various modules according to a combination of the positive and negative terminals formed on both sides of the battery cell, and in the following, a pair of two battery cells connected in parallel and connected in parallel It will be described in detail the battery module is made of a series of battery cells connected to each other.

7 is a perspective view showing a part of the battery module 1000 according to the embodiment 2-1 of the present invention, Figure 8 is a schematic diagram showing a part of the battery module 1000 according to the embodiment 2-1 of the present invention. As shown in FIGS. 7 and 8, the battery module 1000 has a pair of positive and negative terminals 110 or 120 having the same polarity on both sides of the battery module 1000 adjacent to each other. A pair of battery cells 100a connected in parallel are connected to a pair of adjacent battery cells 100b in series to form the battery module 1000. In the drawing, the two battery cells 100a are illustrated. Are connected in parallel, and the pair of battery cells 100a connected in parallel to 3SET are connected in series with each other, but the present invention is not limited to the number of battery cells connected thereto, and a plurality of battery cells 100a may be connected without departing from the spirit of the present invention. The battery is stacked It is desirable to configure the module 1000.

In this case, a pair of battery cells 100a connected in parallel to each other is connected to another pair of battery cells 100a adjacent to each other, and a pair of batteries disposed adjacent to each other so that the directions of electrodes connected in series to each other are the same. By rotating the battery 100b in the longitudinal direction (x-axis) based on the thickness direction (y-axis), the battery module 1000 stacked in one direction may be configured by inverting and disposing the battery 100b. In this case, when the battery cell 100b is rotated in the longitudinal direction (x-axis) and inverted for series connection as described above, the direction in which the positive electrode plate and the negative electrode plate are stacked is not reversed. When the 100b is rotated in the thickness direction (y-axis) based on the longitudinal direction (x-axis), the direction in which the positive electrode plate and the negative electrode plate are stacked is reversed, which may cause performance and safety problems. More specifically, when the direction in which the positive and negative plates are stacked is changed. The movement path of the negative charge moving inside the battery cell may be changed, so that the positive electrode plate and the negative electrode plate should be manufactured to have perfect symmetry with each other, and may cause a failure of the separator interposed between the positive electrode plate and the negative electrode plate, May cause a problem directly related to the explosion.

In addition, as shown in Figure 8, when configuring the battery module 1000, when connected in series with another pair of battery cells (100a) adjacent to one of the positive electrode plate and the negative electrode plate is sufficient, it is not used It is preferable to configure the battery module 1000 by cutting the unnecessary positive electrode terminal 110 and the negative electrode terminal 120, or by putting a protective cap on the unnecessary terminal.

<Example 2-2>

9 is a perspective view showing a part of the battery module 2000 according to the embodiment 2-2 of the present invention, and FIG. 10 is a schematic view showing a part of the battery module 2000 according to the embodiment 2-2 of the present invention. 9 and 10, the battery module 2000 according to the embodiment 2-2 of the present invention has a pair of the positive terminal 110 or the negative terminal having the same polarity to each other on both sides of the battery module 2000. 120 is formed adjacent to each other, a pair of battery cells 100 are connected in parallel with each other, and a pair of the positive electrode terminal 310 and the negative electrode terminal 320 having different polarities on opposite sides, respectively adjacent to each other And the positive electrode terminal 310 and the negative electrode terminal 320 are arranged to have different poles in the longitudinal direction, and the other pair of battery cells 300 connected in parallel to each other are connected in series to connect the battery module 1000. It shows a configuration, wherein the pair of battery cells (100) ), There is no need to reverse the direction of the battery cells 100 and 300 in order to orient the electrode terminals 310 and 320 of the other pair of battery cells 300 connected in series.

<Example 2-3>

In the above-described embodiments 2-1 and 2-2, a battery module in which a plurality of battery cells are stacked is formed, and at this time, the battery cells adjacent at the end of the stacking direction (y-axis) of the battery cells are formed. The electrode, which is not connected to, functions as an external terminal to be connected in a direction different from the stacking direction (y) of the battery cell. In this case, the battery module has terminals having the same pole at both ends of the stacking direction (y-axis), and electrodes having different poles in the longitudinal direction (x-axis) of the battery cell are formed. In this case, the battery modules 1000 and 2000 according to the embodiments 2-1 and 2-2 have an advantage in that parallel connection is easy in the longitudinal direction (x-axis, see FIG. 16) of the battery cell, but different poles are connected to each other. The same terminals are formed to face in the same direction at the time of series connection, which causes a problem of cutting or insulating any one terminal.

In the following, to solve the above-mentioned problems, a battery module having external terminals having the same poles in the longitudinal direction (x-axis) of the battery cell is provided.

11 is a perspective view illustrating a battery module according to a second to third embodiment of the present invention, and FIG. 12 is a schematic view of the battery module according to the second to third embodiments of the present invention. For reference, in the battery module 3000 according to the second embodiment of the present invention, a pair of the positive electrode terminal 510 or the negative electrode terminal 520 having the same poles adjacent to one side is formed, and the one side and the length thereof. A pair of the positive electrode terminal 510 or the negative electrode terminal 520 having different poles adjacent to the other side facing in the direction is formed, so that a pair of battery cells 400 and 500 connected in parallel to each other The battery cells 400 and 500 may be connected in series. In this case, the battery cells 400 and 500 are arranged to have only one electrode terminal 420 and 510 having different polarities, and have the same polarity in directions corresponding to each other. Electrode terminals can be arranged and connected in series Since the electrode terminals having different polarities correspond to each other between the pair of battery cells 400 and 500, a consistent modularization process is possible.

<Example 2-4>

In another aspect of the present invention, in the following, three battery cells are connected in parallel and three battery cells 8set connected in parallel are provided in series to form a battery module 4000 of 3P8S module.

13 is a perspective view illustrating a battery module according to a second to fourth embodiments of the present invention, and FIGS. 14 and 15 are schematic views illustrating a battery module according to a second to fourth embodiments of the present invention. Referring to FIG. 15, the battery module 4000 according to the second to fourth embodiments of the present invention has a pair of the positive electrode terminal 110 or the negative electrode terminal 120 having the same polarity to each other on both sides facing in the longitudinal direction. ) Are stacked on both sides in the stacking direction of the battery cell 100 and the battery cell 100 are formed adjacent to each other and connected in parallel with the battery cell 100, the positive terminal having the same pole adjacent to each other ( A pair of 410 and 510 or cathode terminals 420 and 520 is formed, and a pair of anode terminals 410 and 510 or cathode terminals 420 and 520 having different poles adjacent to the other side facing the one side is formed. Including a pair of battery cells (400, 500) to be connected in parallel to each other The battery cell 100 and a pair of battery cells 400 and 500 are stacked in plural and connected in series to constitute the battery module 4000.

At this time, the battery module 4000, as shown in Figure 14, the battery module 4000a is connected in parallel to the battery cells in the order of 500-100-400, and as shown in Figure 15 the battery cells 400-100 It may be configured as a battery module (4000b) connected in parallel in order 500, wherein the battery module (4000a) and the battery module (4000b) is manufactured in a shape in which the direction of the electrode terminal forming the external terminal is reversed. This is because the external terminals of the battery modules 3000 and 4000 according to the embodiments 2-3 and 2-4 form different poles at both ends in the stacking direction (y-axis), thereby inverting the poles of the external terminals. To this end, as the direction in which the positive and negative electrodes are stacked is reversed, two battery modules 4000a and 4000b in which the electrode directions of the external terminals are reversed by changing the order of the battery cells 400 and 500 connected in parallel. Can be produced.

In addition, without departing from the gist of the present invention, the battery module of the present invention may be formed in a form in which a plurality of parallel connected battery cells are connected to each other in series to form a single battery module, rather than the above-described 2P12S battery module. In detail, at least two or more battery cells are stacked, and adjacent positive or negative terminals each having the same polarity are connected in parallel with each other, and the at least two or more battery cells connected in parallel are stacked in plurality, wherein any one of the parallel The at least two or more battery cells connected in parallel to each other stacked adjacent to at least two or more battery cells connected to each other may form a battery module having various specifications by serially connecting adjacent positive and negative terminals.

16 and 17 are views illustrating coupling between battery modules according to a second embodiment of the present invention, and FIG. 16 is provided at both ends in a stacking direction of the battery cells according to the second to fourth embodiments of the present invention. The electrode terminals connecting the formed external electrodes are connected in series and parallel in a stacking direction (y axis) and a length direction (x axis) of a battery cell of a battery module having different poles. In this case, the battery cells are formed by stacking a plurality of battery modules in the Y-axis direction to form a plurality of battery modules 4000a, and each battery module 4000a is adjacently stacked in the X-axis or Y-axis direction to form one battery module. Can be configured.

<section-A>

Section-A of FIG. 16 shows that the battery module 4000a is connected in series in a stacking direction of a battery cell, wherein the battery module 4000a is stacked on one another adjacent to the Y-axis direction. The positive terminal 410 and the negative electrode terminal 520 having different polarities from each other may be connected to each other in series with each other.

<section-B>

16 shows that the battery module 4000a is connected in series in the longitudinal direction (X axis) of the battery cell, wherein the battery module 4000a is stacked adjacent to the X axis direction. One battery module 4000b and the positive terminal 410 and the negative terminal 520 having different polarities may be connected and connected in series. At this time, the battery module (4000a) is a battery cell is configured in parallel connection in the order of 500-100-400, the battery module (4000b) is a battery cell is configured in parallel connection in the order of 400-100-500, in series connection The external terminals of the battery modules 4000a and 4000b to form the external terminals facing each other in the X-axis direction have the positive electrode terminal 410 and the negative electrode terminal 520 having different polarities. It is preferable to connect using a pair of battery modules (4000a, 4000b) having a shape in which the direction is inverted to the electrode terminal of the external terminal to form different poles at both ends to the shaft).

<section-C>

Section-C of FIG. 16 illustrates that the battery modules 4000a are connected in parallel in a stacking direction of a battery cell, wherein the battery modules 4000a are stacked adjacent one another in the Y-axis direction. The positive electrode terminal 410 and the negative electrode terminal 520 having the same polarity as each other (4000a) may be connected and connected in parallel.

As described above, the battery module composed of the combination of the battery cells of the present invention can be variously modified according to the designed regulations, and there is an advantage in that the free connection in the longitudinal direction and the thickness direction of the battery module is possible.

If necessary, if the direct connection between the electrode terminals is difficult , as shown in Figures 18 to 21 can be connected in series and parallel between the battery cells using an external bus bar, the battery forming the battery module via a separate electrically conductive member (busbar) as a medium The electrode terminals of the batteries may be connected, and the connection between the electrode terminals of the battery cells of the present invention may be variously modified without departing from the gist of the present invention.

At this time, the battery cell of the present invention is composed of a plurality of electrode terminals, as shown in Figure 19 (b), Figure 20 (b) and Figure 21 (b), height the battery cell for series connection By inverting in the direction is connected in series through the contact between the adjacent electrode terminals, there is an advantage that can be connected between the adjacent electrode terminals without a separate bus bar.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

1000, 2000, 3000, 4000: Battery Module
100, 200, 300, 400, 500: battery cell
110, 210, 310, 410, 510: positive terminal
120, 220, 320, 420, 520: negative terminal
130, 230, 330, 430, 530: electrode assembly
140, 240, 340, 440, 540: outer case

Claims (11)

In the battery cell in which the electrode terminal including a positive electrode terminal and a negative electrode terminal protruding to the outside,
The battery cell,
A battery cell having a plurality of electrode terminals, characterized in that a plurality of one or more electrode terminals selected from the positive electrode terminal or the negative electrode terminal is formed on both opposite sides.
The method of claim 1,
The battery cell has a plurality of electrode terminals, characterized in that a plurality of positive electrode terminals or negative electrode terminals having the same polarity to each other on both sides are formed adjacent to each other.
The method of claim 1,
The battery cell has a plurality of electrode terminals, characterized in that a pair of positive and negative terminals having a different polarity on each opposite side is formed adjacent to each other.
The method of claim 3,
A battery cell having a plurality of electrode terminals, characterized in that the positive electrode terminal and the negative electrode terminal formed on opposite sides of the battery cell are arranged to have different poles in the longitudinal direction of the battery cell.
The method of claim 3,
A battery cell having a plurality of electrode terminals, characterized in that the positive electrode terminal and the negative electrode terminal formed on opposite sides of the battery cell are arranged to have the same poles in the longitudinal direction of the battery cell.
The method of claim 1,
The battery cell is adjacent to one side is formed with a pair of positive terminal or negative terminal having the same pole with each other,
A battery cell having a plurality of electrode terminals, characterized in that a pair of positive and negative terminals having a different pole adjacent to the other side opposite to one side is formed.
In the battery module using any one of the battery cells of claim 1,
Two or more of the battery cells are formed by stacking,
The battery module, characterized in that the positive terminal or the negative terminal adjacent to the two or more battery cells are electrically connected.
The method of claim 7, wherein the battery module,
A battery module characterized in that a plurality of positive or negative terminals having the same polarity to each other opposite to each other is formed adjacent to each other, a plurality of battery cells are connected in parallel to each other in series, and connected in series.
The method of claim 7, wherein the battery module,
A plurality of battery cells, each of which has a pair of positive and negative terminals having the same polarity and are adjacent to each other and are connected in parallel to each other;
A pair of positive and negative terminals having different polarities are formed adjacent to each other on opposite sides, and the positive and negative terminals are arranged to have different poles in the longitudinal direction, and a plurality of battery cells connected in parallel to each other are arranged. Battery module, characterized in that connected in series.
The method of claim 7, wherein
The battery module,
A pair of positive and negative terminals having the same poles adjacent to one side is formed, and a pair of the positive and negative terminals having different poles adjacent to the other side are formed, and a plurality of batteries connected in parallel to each other. A battery module, characterized in that the battery is composed of a plurality, connected in series with each other.
The method of claim 7, wherein
The battery module,
A battery cell in which a pair of positive or negative terminals having the same polarity are formed adjacent to each other on both sides thereof;
The battery cell is stacked on both sides in the front and rear direction of the battery cell and connected in parallel with the battery cell, and a pair of positive and negative terminals having the same poles are formed adjacent to one side, and adjacent to the other side opposite to the one side. A pair of battery cells in which a pair of positive and negative terminals having a pole is formed,
Including,
A battery module, characterized in that a plurality of the battery cells and a pair of battery cells connected in parallel to each other are stacked in series.

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