KR101936414B1 - Battery cell having a structure for simultaneous storage and battery pack using the battery cell - Google Patents

Abstract

The present invention relates to a bare cell having a pair of battery taps for outputting a positive and a negative power, and a first case and a second case which are coupled to each other with a bare cell interposed therebetween, And the battery cell is simultaneously stored by the case and the second case.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery cell having a simultaneous storage structure, and a battery pack using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a battery cell having a simultaneous storage structure and a battery pack using the same.

2. Description of the Related Art Generally, unlike a primary battery, a secondary battery capable of charging and discharging is under active research due to development of advanced fields such as a digital camera, a cellular phone, a notebook, and a hybrid vehicle. Examples of the secondary battery include a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-hydrogen battery, and a lithium secondary battery. Among them, the lithium secondary battery has a working voltage of 3.6 V or more and is used as a power source for a portable electronic device, or a plurality of batteries are connected in series to be used in a high-output hybrid vehicle. In a nickel-cadmium battery or a nickel-metal hydride battery The operating voltage is three times higher than that of the conventional method, and the energy density per unit weight is also excellent.

The lithium secondary battery can be manufactured in various forms. Typical examples of the lithium secondary battery include a cylinder type and a prismatic type, which are mainly used in a lithium ion battery. In recent years, a lithium polymer battery which is exposed to light is made of a flexible pouch type cell (hereinafter referred to as "bare cell") cell, and its shape is relatively free.

Conventionally, the lithium battery is stacked more stably and stably, and a battery pack is constructed by connecting a bare cell and a case for housing the bare cell so that the bare cell can be reliably connected in series. A battery cell structure in which a bare cell is accommodated between cell cases is proposed.

Such a structure is effective in reducing the number of cases, but since only one bare cell is accommodated, a large number of battery cells must be added to provide a high capacity battery pack.

That is, in a conventional battery pack, a plurality of battery cells each having a plurality of battery cells are modularized and a plurality of battery cells each having a plurality of battery cells each having a plurality of battery cells are assembled.

In the conventional battery cell, a single battery cell is formed by housing one bare cell using two cases, so that a harness (wiring) for connecting a plurality of battery modules composed of a plurality of battery cells to electric parts, The connection operation is complicated and time consuming.

In addition, in the case of a conventional mild hybrid 48V battery pack mounted on a hybrid vehicle or the like, since two or more battery modules including at least 6 to 12 battery cells must be mounted, the size of the battery module is increased, have.

That is, since the size of the conventional battery pack increases in proportion to the increase in the capacity, the size of the object must be taken into consideration, and the assemblability is poor.

Korean Published Patent Application No. 10-2012-0077635 (Jul. 10, 2012)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a battery pack having a plurality of bare cells, And a battery pack using the battery cell.

Another object of the present invention is to provide a battery cell having a simultaneous storage structure capable of further reducing the size of a battery pack for a hybrid vehicle and improving space utilization, and a battery pack using the same.

Therefore, the present invention may include the following embodiments in order to achieve the above object.
According to an embodiment of the present invention, there is provided a bare cell having a pair of battery taps for outputting positive and negative power, and a first case and a second case which are coupled to each other with the bare cell interposed therebetween, Wherein the first case and the second case are spaced apart from each other by a first horizontal bar and a second horizontal bar extending apart from each other, A plurality of longitudinal bars for dividing the storage spaces of the bare cells by connecting between the first and second transverse bars, a plurality of longitudinal bars formed at the first transverse bars or the longitudinal bars for supporting the engaging ends protruding from the end portions of the bare cells, At least one of the first and second horizontal bars and the first horizontal bar and the second horizontal bar is engraved in one surface to form a protruding groove for pulling the battery tab of the bare cell outwardly, Single longitudinal is one of a bar may include a battery cell having a co-storage structure comprising a take-off groove to form a space for the tool leaving the bare cell are inward from the meeting point to be inserted.

According to another aspect of the present invention, there is provided a battery module comprising a battery module of the above-described embodiment, a fixing panel stacked on the upper surface of the battery module, a first fixing pin for fixing the fixing panel and the battery module by connecting the fixing panel and the battery module, A second fixing pin which is fixed to the panel and spaced apart therebetween and on which electrical components for sensing the cell balancing and abnormal voltage of the battery cells are mounted, And a plurality of bus bars for electrically connecting between the cell and the outermost battery cells on both sides of the battery cell and the circuit board, wherein the battery cell has a pair of battery tabs for outputting positive and negative power And a first case and a second case which are coupled to each other with a bare cell and the bare cell interposed therebetween, wherein the bare cell is a plurality of bare cells, which are simultaneously stored by the first case and the second case, Wherein the first case and the second case are spaced apart from each other by a first horizontal bar and a second horizontal bar extending apart from each other to connect the first horizontal bar and the second horizontal bar to divide the storage space of the bare cells Wherein at least one of the first horizontal bar and the second horizontal bar has an engaging groove for supporting an engaging end protruding from the end of the bare cell and formed in a stepped shape on the first horizontal bar or the vertical bar, A protruding groove formed to protrude outwardly the battery tab of the bare cell and a jig for releasing the bare cell inward from a point where one of the first and second transverse bars meets any one of a plurality of longitudinal bars, A battery cell having a concave housing structure including a lead-out groove for forming a space into which the battery cell is inserted.

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Therefore, according to the present invention, two or more bare cells can be housed in a single case, and the storage capacity can be increased, so that a high capacity battery pack can be manufactured in a smaller size.

Further, the present invention can manufacture a battery pack with a smaller size than a capacity, and can improve space utilization when mounted in a limited space such as a hybrid vehicle.

1 is a perspective view showing a battery pack using a battery cell having a simultaneous storage structure according to the present invention.
Figure 2 is a perspective view of the cell assembly of Figure 1;
FIG. 3 is an exploded perspective view of FIG. 2. FIG.
4 is a perspective view showing a fixing panel.
5 is an exploded perspective view of the battery cell.
6 is a perspective view showing a coupling relationship of the battery cells.
Figure 7 is a side view of the cell assembly.
8 is a perspective view showing the booth bar assembling member of the present invention.
9 is an exploded perspective view of the bus bar assembly member.
10 is a rear view showing another embodiment of the battery module according to the present invention.
11 is an exploded perspective view showing another embodiment of the battery cell in the present invention.

Hereinafter, embodiments and examples of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention.

However, the present invention may be embodied in many different forms and is not limited to the embodiments and examples described herein, and the terms and words used in the specification and claims are not to be construed in a conventional or dictionary sense, It should be construed as meaning and concept consistent with the technical idea of.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, preferred embodiments of a battery cell having a simultaneous storage structure according to the present invention and a battery pack using the battery cell will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a battery pack using a battery cell case having a simultaneous storage structure according to the present invention, FIG. 2 is a perspective view showing a cell assembly, and FIG. 3 is an exploded perspective view of FIG.

1 to 3, a battery pack using a battery cell case having a simultaneous storage structure according to the present invention includes a cover 10, a housing 20 forming a storage space, Lt; / RTI > cell assembly.

The cover 10 has a handle 11 which hermetically closes the upper portion of the housing and is rotated in the front-rear direction.

The housing 20 may include a positive and a negative power terminal for outputting a power supplied from the cell assembly at a top thereof and a space for accommodating the cell assembly at the inside thereof. Also, the housing 20 may have a plurality of heat dissipation holes (not shown) on the wall surface of the housing. A discharge hole (not shown in the figure) is formed as a double penetration through the wall surface of the housing 20.

Since the outside air flows into the inside of the radiating hole and the air flows through which the heated air can flow out, it can realize a natural cooling structure without a separate cooling device.

The cell assembly includes a plurality of battery modules 100 including a plurality of battery cells 110, a circuit board 400 on which electrical components for detecting abnormalities of the battery modules 100 are mounted, A fixed panel 200 for supporting and isolating the circuit board 400 from the battery module 100 so as to isolate the battery module 100 from the battery module 100 and a bus bar 500 connecting the circuit module 400 and the circuit board 400, And a second fixing pin 600 for fixing the circuit board 400 to the fixing panel 200. The first fixing pin 300 is inserted into the first fixing pin 300,

The battery module 100 may have a plurality of battery cells 110 stacked. At this time, as the battery cells 110 are housed in a single case with a plurality of bare cells, the battery taps can be aligned as a plurality of rows as shown in the figure.

Here, the present invention can accommodate two or more bare cells in one case, and a plurality of battery modules 100 can be integrally formed. In other words, for example, when two bare cells are housed in one case, the stacked structure of one bare cell is referred to as a first battery module 100, the stacked structure of the other bare cells is referred to as a second And a battery module 100. That is, according to the present invention, the battery module 100, which is conventionally divided into a plurality of cells, can be completed with one assembly.

The bus bar 500 includes a first bus bar 510 connected to the circuit board 400 from the first battery module 100 and a second bus bar 510 connected to the circuit board 400 from the second battery module 100. [ A plurality of third bus bars 530 for connecting the battery cells 110 in the first and second battery modules 100 and 100 and a plurality of third bus bars 530 connecting the first and second battery modules 100 and 100, A fourth bus bar 540 connecting the second battery module 100 and the second battery module 100 and a fifth bus bar 550 and a sixth bus bar 550 connecting the power terminal of the housing 20 to the circuit board 400, 560).

The present invention relates to a bus bar assembly for interconnecting divided bus bars 500 so as to be universally usable for the height of the battery module 100 and the position of the circuit board 400 or the deformation of the housing 20. [ (See Figs. 8 and 9). This will be described later.

The first bus bar 510 and the second bus bar 520 are connected to the battery taps of the battery cell 110 stacked on the uppermost side of the first battery module 100 and the second battery module 100, (+) Or negative (-) power source to the circuit board 400, respectively.

The third bus bar 530 is composed of two conductive metal plates fastened with battery tabs interposed therebetween so as to connect the two battery tabs adjacent to the upper and lower sides. At this time, the third bus bar 530 fixes the battery tab by fixing means (not shown) communicating with the two conductive metal plates.

The fourth bus bar 540 is connected between the first battery module 100 and the battery taps located at the lowermost side of the second battery module 100. For example, the fourth bus bar 540 may be configured such that negative (-) of the battery cell 110 positioned at the lowermost side of the first battery module 100 is connected to the lowermost side of the second battery module 100 And the positive (+) battery tab of the positioned battery cell 110 is connected.

The fifth bus bar 550 and the sixth bus bar 560 are connected to the power terminal of the housing 20 on the circuit board 400 to transmit power sources having different polarities.

The circuit board 400 may be provided with one electric component (for example, a BMS, a connector and a circuit element) for each battery module 100 (for example, a first board 410 and a second board 420) ) Is mounted. For example, the first substrate 410 is installed in the first battery module 100, and the second substrate 420 is installed in the second battery module 100. Electrical components mounted on the first substrate 410 and the second substrate 420 may be selected according to the designer's intention.

Here, the circuit board 400 is spaced apart from the fixed panel 200 by the second fixing pin 600.

The fixed panel 200 is installed on the upper side of the first battery module 100 and the second battery module 100 to fix the first substrate 410 and the second substrate 420 to be spaced apart from the battery module 100 . That is, the fixing panel 200 insulates the circuit board 400 from the battery module 100. A specific configuration will be described with reference to Fig.

4 is a perspective view showing a fixing panel.

4, the fixed panel 200 includes a first panel 210 for insulating the first battery module 100 and the first substrate 410 from each other, And a second panel 220 for insulating the second substrate 420 and the second substrate 420 from each other. The first panel 210 will be described as an example.

The first panel 210 is formed in a frame structure extending and connected to both the horizontal and vertical directions around the opening window 215 formed at the central portion. More specifically, the first panel 210 includes a first support bar 211, a third support bar 213, a first support bar 211, and a third support bar 213, A second support bar 212 and a fourth support bar 214 interconnecting the first and second support bars.

The first supporting bar 211 and the third supporting bar 213 are fixed to the fixing window 210 with a second fixing hole (not shown) protruding toward the opening window 215 and into which the second fixing pin 600 is inserted. 0.0 > 211a. ≪ / RTI >

The second support bar 212 and the fourth support bar 214 are formed at both ends of the first support bar 211 and the third support bar 213, And the first fixing hole 212a.

That is, the first supporting bar 211 and the third supporting bar 213 are supported by the second fixing pin 600 fastened and separated from the upper circuit board 400, The first support bar 211 and the third support bar 213 may be formed in a stepped relation with the first support bar 212 and the fourth support bar 214 to be spaced apart from the battery module 100.

The battery cell 110 will be described with reference to Figs. 5 to 7. Fig.

FIG. 5 is an exploded perspective view of the battery cell, FIG. 6 is a perspective view showing a coupling relationship of the battery cells, and FIG. 7 is a side view of FIG.

5, the battery cell 110 includes bare cells 113 and 114 having positive and negative battery taps, a first case 111 (not shown) for pressing and holding one surface of the bare cells 113 and 114, And a second case 112 for pressing and holding the opposite surface of the bare cells 113 and 114. That is, the first case 111 and the second case 112 are coupled to each other with the bare cells 113 and 114 interposed therebetween, and the bare cells 113 and 114 are housed in mutually symmetrical housings.

For example, the first surface (A) of the first case (111) is formed in the same structure as the second surface (B) of the second case (112) ) Form the same structure as the first surface (A) of the second case (112). Here, the second surface B of the first case 111 and the first surface A of the second case 112 are in direct contact with the opposite surface of the bare cells 113 and 114. The first surface A of the first case 111 is connected to the second surface B of the second case 112 of the other battery cell 110, (B) is associated with the first side (A) of the first case (111) of another battery cell (110).

The structure of the first case 111 and the second case 112 will be described in more detail below.

First, the bare cells 113 and 114 are, for example, rectangular pouch type housed in two or more cases. The bare cells 113 and 114 include a pair of battery tabs 113a and 114a projecting from the main body and latching ends 113b and 114b extending along the ends of the main bodies 113c and 114c. Here, the battery tabs 113a and 114a may protrude from one side of the bare cells 113 and 114 or may protrude from both sides of the bare cells 113 and 114 as a pair.

The first case 111 has a frame structure extending in the lateral and longitudinal directions so as to expose one surface of the bare cells 113 and 114. Specifically, the first case 111 has a pair of horizontal bars The storage spaces of the bare cells 113 and 114 are connected between the first and second horizontal bars 111a and 111b (for example, the first horizontal bar 111a and the second horizontal bar 111b) and the horizontal bars 111a and 111b, And a first fastening hole 111f into which a plurality of vertical bars 111c, 111d and 111e and a first fixing pin 300 are inserted.

The first horizontal bar 111a and the second horizontal bar 111b are spaced apart from each other and extend in the same direction at opposite positions.

The plurality of vertical bars 111c, 111d and 111e may be formed as a first vertical bar 111c to a third vertical bar 111e with a first bare cell 113 and a second bare cell 114 Space to accommodate. That is, the first vertical bar 111c and the second vertical bar 111d extend between the first horizontal bar 111a and the second horizontal bar 111b, It is spaced apart as accommodated.

Similarly, the second vertical bar 111d and the third vertical bar 111e are connected to each other at the central portion and the other end of the first horizontal bar 111a and the second horizontal bar 111b, Space to accommodate. At this time, the second vertical bar 111d and the third vertical bar 111e are spaced apart to accommodate the width of the second bare cell 114.

That is, a plurality of vertical bars 111c, 111d, and 111e are spaced apart from each other by a length sufficient to accommodate the bare cells 113 and 114, and may be further added according to the number of the bare cells 113 and 114.

The plurality of vertical bars 111c, 111d and 111e are formed on the first surface A in correspondence with the second case 112 of the other battery cell so that the heat dissipating grooves 111h ).

The second case 112 includes a pair of horizontal bars 112a and 112b spaced apart from each other and extending in mutually opposite directions and a pair of horizontal bars 112a and 112b, And includes a plurality of vertical bars 112c, 112d, and 112e for dividing the storage section. The second case 112 includes a latching groove 112i for supporting the latching ends 113b and 114b extending along the ends of the bare cells 113 and 114 on the first surface A, A protruding groove 112g from which the first and second fixing pins 300a and 113a are drawn out and an extraction groove 112j inward into the coupling groove 112i so as to facilitate detachment and attachment of the bare cells 113 and 114, And a second fastening hole 112f to be inserted.

The plurality of vertical bars 112c, 112d and 112e connect the pair of the horizontal bars 112a and 112b and define the storage space of the bare cells 113 and 114, respectively. That is, the first vertical bar 112c is connected to one end of the first horizontal bar 112a and the second vertical bar 112b, and the second vertical bar 112d is connected to the first horizontal bar 112a and the second horizontal bar 112b. And the third vertical bar 112e is connected to the other end of the first horizontal bar 112a and the second horizontal bar 112b.

The latching groove 112i is formed on the first surface A of the pair of the horizontal bars 112a and 112b and the horizontal bars 112a and 112b positioned on the opposite side of the battery tabs 113a and 114a And is extended to the vertical bars 112c, 112d, and 112e. That is, the latching groove 112i is formed in the first horizontal bar 112a by a step downward from the first vertical bar 112c and the first surface A of the second vertical bar 112d to form the bare cells 113 and 114 (113b, 114b).

The projecting groove 112g is formed as a recessed groove in the second horizontal bar 112b. Here, the projecting grooves 112g are formed at the same height so as to form a flat surface with the engaging grooves 112i.

The lead grooves 112j are formed in the stepped grooves 112i in such a manner that the longitudinal bars 112c and 112d and the longitudinal bars 112c and 112d and the longitudinal bars 112c and 112d and the longitudinal bars 112c and 112d, And a space for inserting an end of a jig including a pin or a needle for releasing the bare cells 113 and 114 is formed.

That is, the lead-out groove 112j forms a space through which the operator can insert the jig for drawing out the bare cells 113 and 114 from the second case 112. [

The structure of the first surface A of the first case 111 is the same as that of the second surface B of the second case 112, Has the same structure as the second surface B of the first case 111. [

That is, the vertical bars 112c, 112d, and 112e of the second case 112 are located on the first side A of the vertical bars 111c, 111d, and 111e of the first case 111 on the second side B The same heat dissipation groove 112h as the heat dissipation recess 111h is formed. The engaging grooves 112i and the withdrawing grooves 112b of the second case 112 are formed on the second side B of the vertical bars 111c and 111d and 111e of the first case 111, 112j are formed with the same engaging grooves 111i and lead-out grooves 112j.

The symmetrical structure of the first case 111 and the second case 112 may be such that the heat dissipation holes W are formed between the battery cells 110 to 130 in the stacked battery module 100. 6 and 7, the first to third battery cells 110 to 130 will be described in the first battery module 100 in which a plurality of battery cells 110 are stacked.

The first to third battery cells 110 to 130 are connected to the first and second battery cells 110a to 110b in the first and second cases respectively housing a plurality of bare cells 113, 114, 123, 124, 121b and 131a and 131b and the vertical bars 111c to 111e and 121c to 121e and 131c to 131e and the heat radiating grooves 111h to 121h and 131h and the lead grooves 111j and 112j and the engaging grooves 111i and 112j, Respectively.

Therefore, the first battery cell 110 has the second surface B of the second case 112 connected to the first surface A of the first case of the second battery cell 120, And the second case of the second battery cell 120 forms a heat dissipating opening W in conjunction with the first case of the third battery cell 130.

That is, as described above, the heat dissipation opening W is formed in the first side A of the vertical bars 111c, 111d and 111e of the first case and the second side A of the vertical bars 112c, 112d and 112e of the second case, Are formed by the heat dissipating grooves 111h and 112h formed on the surface B, respectively.

The bus bar assembly member 700 will be described with reference to Figs. 8 and 9. Fig.

FIG. 8 is a perspective view showing the booth bar assembling member of the present invention, and FIG. 9 is an exploded perspective view of the booster bar assembling member.

8 and 9, the bus bar assembly member

The bus bar assembly member 700 is configured to connect the divided bus bars 500 to each other. For example, the first bus bar 510 (and / or the second bus bar 520, the fourth bus bar 540, the fifth bus bar 550, and the sixth bus bar 560) And includes a first split bar 511 and a second split bar 512 that are mutually divided so as to be universally usable in other battery modules 100 having a wide width.

The bus bar assembling member 700 is characterized in that the divided bus bars 511 and 512 are interconnected so as to be energized.

The first split bar 511 and the second split bar 512 include first and second coupling holes 511b and 512b formed at the ends 511a and 512a and second coupling holes 511c and 512c do.

The first engaging holes 511b and 512b and the second engaging holes 511c and 512c have different diameters and are fixed by fastening means (not shown) (not shown) for inserting the bus bar assembling member 700, And the length of the ends of the first split bar 511 and the second split bar 512. [ That is, when the lengths of the end portions of the first split bar 511 and the second split bar 512 are different from each other, for example, the first split hole 511b of the first split bar 511, (Not shown) may be connected to the second engaging hole 512c of the bar 512 to be fixed to the bus bar assembling member 700. [ 512b and the second engaging holes 511c, 512c according to the diameter of the fixing means (not shown).

The bus bar assembly member 700 includes a conductive plate 730 as a conductive metal plate which is in close contact with the first divided bar 511 and the second divided bar 512 to energize both sides thereof and a second divided bar 511, And includes a first assembly plate 710 and a second assembly plate 720 which are mutually coupled to receive the split bar 512 and the conductive plate 730 therein.

The first assembly plate 710 is a plate member extending in the longitudinal direction and includes a first plate member 711 for pressing one surface of the first split bar 511 and the second split bar 512 on one surface, A plurality of pressing protrusions 712 protruding from both sides of the first plate hole 711 and a first plate hole 713 penetrating the first and second coupling holes 511b and 512b to communicate with the first and second coupling holes 511c and 512c, .

The first plate member 711 is a plate member extending in the longitudinal direction and has a first dividing bar 511 and a second dividing bar 511 with a pressure applied by the pressing protrusion 712 and / (512).

The pressing protrusions 712 are formed on both side edges of the first plate 711 so as to be rotatable by protruding and elastic forces. Therefore, the pressing projection 712 is rotated in the outward direction while the end of the pressing projection 712 is in close contact with the second assembly plate 720, and then the pressing projection 712 is positioned by the elastic force and presses the rear face of the second assembly plate 720.

The first plate hole 713 is formed so as to communicate with the first coupling holes 511b and 512b or the second coupling holes 511c and 512c and a fixing means (not shown) (not shown) is communicatively inserted .

The second assembly plate 720 includes a second plate member 721 extending in one direction and a first and second split bars 511 and 512 protruding from both sides of the second plate member 721, And a second plate hole 723 penetratingly formed at a position coinciding with the first plate hole 713. The first plate hole 713 is formed in the first plate hole 713,

The second plate member 721 extends in the longitudinal direction and is in close contact with one surface of the conductive plate 730. That is, the second plate member 721 is fixed to the first plate member 711 by the pressing force applied while the pressing protrusion 712 is fastened to the back surface, and the conductive plate 730 and the first split bar 511 and the second And presses the split bar 512.

The fitting protrusions 722 are formed on the upper and lower sides of the second plate member 721, respectively. The pair of fitting protrusions 722 are spaced apart from each other and sandwich the first divided bar 511 and the second divided bar 512 so as to be in close contact with each other.

At least one second plate member 723 is formed on the upper and lower sides of the second plate member 721 and has a first plate hole 713 and a first engagement hole 511b and a second engagement hole 511c , 512c and a conductive plate 730 are connected to each other by a fixing means (not shown) (not shown).

At this time, the conductive plate 730, the first split bar 511 and the second split bar 512 are not fastened by separate fastening means (not shown) (not shown) The second plate member 721 can be fixed only by the pressing force of the pressing protrusion 712.

Alternatively, the conductive plate 730 and the first split bar 511 and the second split bar 512 may be fastened by fixing means (not shown) (not shown) May be additionally formed.

The conductive plate 730 includes a head portion 731 which is brought into close contact with an end 511a of the first split bar 511, a tail portion 732 which is brought into close contact with an end 512a of the second split bar 512, And an extension 733 extending between the head portion 731 and the tail portion 732.

The head portion 731 is formed with a first groove 731a which is cut at one side and communicated with a fixing means (not shown) (not shown) so as to cover the first split bar 511 and one surface of the second plate 721, . The head portion 731 is in contact with the first split bar 511 while the first plate 711 and the second plate 721 are pressed by the pressing protrusions 712 and the fixing means (Not shown).

The tail portion 732 has a second groove 732a cut upward from the lower side and is positioned between one side of the second plate 721 and the second split bar 512. The tail portion 732 is brought into close contact with the second split bar 512 when the pressing projection 712 of the first assembly plate 710 is fastened to the second plate 721. [ Here, the second groove 732a is cut out upward from the lower side and is fixed with fixing means (not shown) (not shown) inserted through the second coupling holes 511c, 512c, 512c and the first plate hole 713, .

The extension portion 733 is connected between the head portion 731 and the tail portion 732 to enable electrical conduction between the first split bar 511 and the second split bar 512.

In the battery module 100 according to the present invention, the heat dissipation holes W are formed on the side surfaces of the battery module 100 by coupling between the case of the battery cells 110 as described above, 100 may be formed on the side surface and the back surface of the heat dissipating unit. This will be described with reference to FIGS. 10 and 11. FIG.

FIG. 10 is a rear view showing a cell assembly in another embodiment of the present invention, and FIG. 11 is an exploded perspective view showing another embodiment of the battery cell in the present invention.

10 and 11, in the present invention, the battery cell 110 includes a plurality of bare cells 113 and 114 having positive and negative battery taps, and a plurality of bare cells 113 and 114, And a second case 112 for pressing and holding the opposite surface of the plurality of bare cells 113 and 114. [

The first case 111 and the second case 112 accommodate a plurality of bare cells 113 and 114 at the same time, And a heat dissipation port W is formed on the side surface and the back surface. That is, the first surface A of the first case 111 is formed in the same structure as the second surface B of the second case 112, and the second surface B of the first case 111 Thereby forming the same structure as the first surface A of the second case 112.

At this time, the battery cells 110 of the other embodiments are characterized in that the heat dissipation holes W are formed on the side surface and the back surface by mutual connection. The structure of such another embodiment will be described in more detail below.

Each of the bare cells 113 and 114 includes a pair of battery tabs 113a and 113c protruding from one side of the main body 113 and 114c, 114a extending along the end portion and engaging ends 113b, 114b extending along the end portion.

The first case 111 has a frame structure extending in the lateral and longitudinal directions so as to expose one surface of the bare cells 113 and 114. Specifically, the first case 111 has a pair of horizontal bars Which are connected between the horizontal bars 111a and 111b (the first horizontal bar 111a and the second horizontal bar 111b) and the horizontal bars 111a and 111b to divide the storage space of the bare cells 113 and 114 And a first fastening hole 111f into which the vertical bars 111c, 111d, and 111e and the first fixing pin 300 are inserted.

The plurality of vertical bars 111c, 111d and 111e may be formed as a first vertical bar 111c to a third vertical bar 111e with a first bare cell 113 and a second bare cell 114 Space to accommodate. The plurality of vertical bars 111c, 111d and 111e are connected to the second case 112 of the other battery cell 110 on the first surface A so as to form an inwardly directed Heat dissipating grooves 111h are formed.

In addition, the first horizontal bar 111a and the second horizontal bar 111b of the first case 111 are spaced apart from each other and extend in the same direction at mutually facing positions. Here, the first horizontal bar 111a and the second horizontal bar 111b form a second heat dissipating groove 112k formed as a groove inward from the first surface A.

The first heat dissipation grooves 111h and 112h are for forming a heat dissipation hole W on the side surface of the battery module 100 in cooperation with other battery cells 110, The heat dissipation holes W are formed on the back surface of the battery module 100 in cooperation with the cells 110. [

The second case 112 has the same structure as the first surface A of the first case 111 on the second surface B because the second case 112 has a symmetrical structure with the first case 111 as described above .

That is, the second case 112 is formed with second heat dissipating grooves (not shown, refer to 111k) that are inwardly directed from the horizontal bars 112a and 112b on the second surface B, The heat dissipation holes W are formed on the back surface in cooperation with the second heat dissipating grooves 111k formed on the first surface A of the first case 111 of the first case 111. [

Therefore, the battery module 100 may include, for example, first heat dissipating grooves 111h and 112h formed on the second surface B of the second case 112 of the first battery cell 110, 111k are connected to the first heat dissipating grooves 111h and 112h formed on the first surface A of the first case 111 of the second battery cell 120 and the second heat dissipating grooves 111k, A heat dissipation port W is formed between the battery cell 110 and the second battery cell 120 on the side surface and the back surface, respectively.

The second battery cell 120 and the third battery cell 130 are connected to the first heat dissipating grooves 111h and 112h formed on the second surface B of the second case 112 of the second battery cell 120, The second heat radiation groove 111k and the first heat radiation groove 111h formed on the first surface A of the first case 111 of the third battery cell 130 and the second heat radiation groove 111k The heat dissipation holes W are formed on the side surface and the back surface of the battery module 100, respectively.

The present invention includes the above-described configuration, and the ease of assembly achieved through the above-described configuration will be described below.

First, the operator holds a plurality of bare cells 113, 114 in the storage space partitioned by the vertical bars 112c, 112d, 112e in the second case 112, respectively. At this time, the bare cells 113 and 114 have hooking ends 113b and 114b on the first surface A and the hooking grooves 112i formed on the first bar body 112a and the vertical bars 112c, 112d and 112e, . Thereafter, the operator presses and tightens the first case 111 to the second case 112 to simultaneously store a plurality of bare cells 113 and 114 in one battery cell.

A plurality of battery cells 110 to 130 assembled in this manner are sequentially stacked, and then the fixing panels 200 are installed on the upper side of the battery module 100, respectively. The first fixing pin 300 is inserted through the fixing panel 200 and the fastening holes 111f and 212a of the battery cells 110 to 130). Accordingly, the first fixing pin 300 fixes the battery module 100 and the fixing panel 200. Since the second support bar 212 and the fourth support bar 214 of the fixed panel 200 form an upward step with respect to the first support bar 211 and the third support bar 213, ).

In addition, the circuit board 400 is fixed in a state spaced apart from the fixed panel 200 by the second fixing pin 600 which is communicated after the fixing panel 200 is fixed.

Then, the operator tightens the bus bars 500 into the battery module 100 when the assembling work of the circuit board 400 is completed or before. The first bus bar 510 is one of the outermost battery taps among the bare cells 113 and 114 stacked on one side and the second bus bar 520 is connected to one of the battery taps located on the other side of the bare cells 113 and 114 And the other end thereof is connected to the circuit board 400. The other end of the battery tab is connected to the circuit board 400. [ Here, the first bus bar 510 and the second bus bar 520 are connected to a battery tab that outputs different polarities.

The third bus bar 530 connects the battery taps of adjacent battery cells 110 to each other to energize them. For example, the third bus bar 530 is divided into two conductive plates, and the battery taps drawn out from the different battery cells 110 therebetween are placed in an overlapped state and then communicated with fixing means (not shown) Fixed.

The operator may connect the first bus bar 510 and the second bus bar 520 so that the fourth bus bar 540 is electrically connected to the first battery cell 110 and the second battery cell 110 And connects between battery taps and battery taps located opposite to each other.

Then, the operator connects the fifth bus bar 550 and the sixth bus bar 560 to the power source terminal of the circuit board 400 and the housing 20, respectively, to complete the assembly of the cell assembly.

Such assembling of the cell assembly can reduce the assembling time as compared with the battery packs having the same capacity because they simultaneously accommodate a plurality of bare cells 113 and 114 in one case, And is suitable for an object having a limited space such as a hybrid vehicle.

It will be apparent to those skilled in the art that various modifications and equivalent arrangements may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: housing 20: cover
30: Power terminal 100: Battery module
110, 120, 130: Battery cell 111: First case
111a, 111b: horizontal bars 111c, 111d, 111e: vertical bars
111f, 112f: fastening holes 111g, 112g: projecting groove
111h, 112h, 111k: heat dissipating grooves 111i, 112i:
111j, 112j: draw-out groove 200: fixed panel
210: first panel 220: second panel
211 to 214: support bar 211a:
212a: first fixing hole 215: opening window
300: first fixing pin 400: circuit board
410: first substrate 420: second substrate
500: Bus bar 510: First bus bar
520: Second Bus Bar 530: Third Bus Bar
540: fourth bus bar 550: fifth bus bar
560: sixth busbar 600: second fixing pin
700: Booth bar assembly member

Claims (10)

A bare cell having a pair of battery tabs for outputting positive and negative power; And
And a first case (111) and a second case (112) that are coupled to each other with the bare cell interposed therebetween and simultaneously store a plurality of bare cells,
The first case (111) and the second case (112)
A first transverse bar and a second transverse bar extending mutually apart;
A plurality of vertical bars spaced apart from each other to define a space for storing the bare cells by connecting the first horizontal bar and the second horizontal bar;
A latching groove (112i) formed on the first horizontal bar or the vertical bars to support a latching end protruding from the end of the bare cell;
At least one of the first horizontal bar and the second horizontal bar is formed on one surface of the first horizontal bar and the second horizontal bar to project the battery tab of the bare cell outwardly; And
And an extraction groove (112j) for forming a space into which a jig for inserting the bare cell is inserted inward at a point where one of the first and second horizontal bars and the plurality of vertical bars meet, A battery cell having a simultaneous storage structure.
delete delete A battery module having a plurality of battery cells;
A fixing panel stacked on the upper surface of the battery module;
A first fixing pin for fixing the fixing panel and the battery module through the fixing panel and the battery module;
A circuit board fixed to the fixed panel with a spaced space therebetween to mount electric components for sensing cell balancing and abnormal voltages of the battery cells;
A second fixing pin for fixing the circuit board so as to be spaced apart from the fixing panel through the circuit board; And
And a plurality of bus bars for electrically connecting between the battery cell and the outermost battery cells on both sides of the battery cell and the circuit board,
The battery cell
A plurality of bare cells each having a pair of battery tabs for outputting positive and negative power; And
And a first case (111) and a second case (112) which are coupled to each other with the plurality of bare cells interposed therebetween and simultaneously store the plurality of bare cells,
The first case (111) and the second case (112)
A first transverse bar and a second transverse bar extending mutually apart;
A plurality of vertical bars spaced apart from each other to define a space for storing the bare cells by connecting the first horizontal bar and the second horizontal bar;
A latch groove 112i formed on the first horizontal bar or the vertical bars to support a latching protrusion protruding from an end of the bare cell;
At least one of the first horizontal bar and the second horizontal bar is formed on one surface of the first horizontal bar and the second horizontal bar to project the battery tab of the bare cell outwardly; And
And an extraction groove (112j) for forming a space into which a jig for inserting the bare cell is inserted inward at a point where one of the first and second horizontal bars and the plurality of vertical bars meet, A battery pack using a battery cell having a simultaneous storage structure.
The battery module according to claim 4, wherein the battery module
A plurality of bare cells are accommodated in the battery cells, the bare cells are aligned as a plurality of rows,
The booth bar
A first bus bar connecting the circuit board to any one of battery tabs of a bare cell located outermost in a row;
A second bus bar connected to the circuit board at any one of the battery taps of the bare cell located at the outermost side of the other row;
A third bus bar connecting the battery taps of the bare cells between the outermost sides;
A fourth bus bar interconnecting the battery tabs of the first and second busbars and the battery tabs of the bare cell located on the outermost side;
And a fifth bus bar and a sixth bus bar connected to the power terminal of the housing in the circuit board.
delete delete The battery module according to claim 4, wherein the battery module
And a heat dissipation hole is formed in the battery cell so as to form an open groove between the battery cell and the battery cell.
The battery pack of claim 4, wherein at least one of the vertical bars has a first heat dissipating groove which is inwardly inwardly communicated with a first surface of the battery cell,
And the heat dissipation holes are formed in association with the first heat dissipation grooves of the other battery cells.
5. The battery pack according to claim 4, wherein at least one of the horizontal bars has a second heat dissipating groove which is inwardly inwardly communicated on one side of the first battery cell,
And the heat dissipating port is formed in connection with the second heat dissipating grooves of the other battery cells.

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