KR20180100811A - Battery pack for car improving a packaging efficiency by connecting structure of the sensing board and bus bars - Google Patents

Abstract

The present invention discloses a battery pack for a car improving packaging efficiency by the connecting structure of a sensing board and a bus bar. The battery pack may include a housing having an outer case which is hermetically sealed by a cover having a connector for fastening a starter plug extending from a starter; an inner case for accommodating a plurality of battery cells inside the outer case, a circuit board for mounting a battery management system (BMS) for sensing the cell balancing and abnormal voltages of battery cells, a plurality of bus bars for electrically connecting the battery cell and the battery cell, and the outermost battery cells and the circuit board, and a sensing board which has a plurality of integrated sensors for sensing the battery cells and is separated and fixed on one surface of an inner case to guide the bus bars.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pack for automobile, which improves packaging efficiency by a connection structure of a sensing board and a bus bar.

The present invention relates to an automobile battery pack in which packaging efficiency is improved by a connection structure of a sensing board and a bus bar.

In recent years, lithium secondary batteries, which can be charged and discharged, have been widely used as energy sources for wireless mobile devices. In addition, it is attracting attention as a power source for electric vehicles and hybrid electric vehicles (HEV), which are proposed as measures to solve air pollution of existing gasoline vehicles and diesel vehicles that used fossil fuels.

BACKGROUND ART [0002] Medium- to large-sized devices such as automobiles use a middle- or large-sized battery system in which a plurality of battery cells are electrically connected to each other due to the necessity of a high output large capacity. As the medium or large-sized battery system gradually increases the required output amount or energy density, the number of unit modules included in the middle- or large-sized secondary battery will gradually increase.

The pouch-type lithium ion polymer secondary battery, which is often used as a unit cell in such a middle- or large-sized battery system, has a relatively large size as compared with the same-type battery used in a small-sized device.

Also, when designing a pack of a medium-sized lithium secondary battery used as a power source for an electric vehicle, a plug-in, and a hybrid automobile, a high energy is required in addition to requiring a high output like a conventional battery. As a result, the capacity of medium and large batteries should become higher and higher. In order to achieve this, a large capacity battery must be mounted in a limited space, so that a large number of cells or a large number of unit cells must be packaged in one lithium secondary battery.

As described above, the number of unit cells included in one battery increases or the cell size becomes very large. In this case, the packaging process becomes complicated and the thickness of the packaging increases. As a result, difficulties in the manufacturing process, reduction in performance, and an inefficient space may not be used.

Therefore, in the conventional method of manufacturing a large capacity cell and a battery having a large number of unit cells, there is a need for a simple and efficient method of connecting a lithium secondary battery, that is, a packaging method .

On the other hand, in recent years, a high performance battery having a high charging capacity such as a unit cell constituting a unit cell has been developed, and battery packs and the like are becoming smaller. That is, small-sized passenger cars such as golf cars, indoor electric vehicles, and miniature electric vehicles such as hybrid cars require a small starting battery pack for obtaining a starting power source.

However, since the small battery pack of the small electric vehicle or the starting battery of the passenger car needs to be installed in a limited space, the connection between the battery cells 200, A packaging structure including a connection structure of the bar and the sensing board 300, and the like are becoming more important.

That is, in recent years, both a large battery pack and a small battery pack have to be installed in a limited space. Therefore, an efficient packaging technology is required to more effectively utilize the internal space such as a connection between a battery cell and a bus bar. Packaging technology has not been proposed yet, so development is urgent.

Korean Patent Laid-Open Publication No. 10-2017-0009135 (published on Jan. 25, 2017)

It is an object of the present invention to provide a sensing board capable of improving the cell assembly and the connection structure thereof so as to increase the internal space utilization of the battery pack mounted on a vehicle, And the packaging efficiency of the battery pack is improved by the connection structure of the bus bar.

Another object of the present invention is to provide a battery pack for an automobile having improved packaging efficiency by a connection structure of a sensing board and a bus bar having a prefabricated connection structure for facilitating mutual connection and disconnection between busbars.

The present invention includes the following embodiments in order to achieve the above object.

A preferred embodiment of the present invention is a battery charger comprising a housing having an outer case that is sealed at an upper portion by a cover having a connector to which a starter plug extending from the starter is fastened, And a circuit board on which a BMS (Battery Management System) for sensing an abnormal voltage is mounted, a battery cell, a battery cell, and a circuit board, which are electrically connected to each other, between the outermost battery cells and the circuit board And a plurality of sensors for sensing the battery cells may be integrated and a sensing board may be fixed and spaced from one surface of the inner case to guide the bus bar.

Accordingly, the present invention can improve the space utilization of the cell assembly by improving the engaging sensing board and the bus bar connection structure, thereby making it possible to further miniaturize the battery pack for starting the automobile installed in the limited space of the automobile.

Further, since the connection structure of the bus bar can be implemented in a prefabricated manner, the assembling process of the bus bar can be more easily performed, and the workability can be improved.

1A and 1B are front and rear perspective views showing a first embodiment of the present invention.
2 is an exploded perspective view showing the first embodiment of the present invention.
3 is a perspective view showing the cell assembly of the first embodiment.
4 is an exploded perspective view showing the cell assembly of the first embodiment.
5 is a plan view showing the sensing board of the first embodiment.
6 is a perspective view showing an inner case of the first embodiment.
7 is a perspective view showing the second embodiment.
8 is a perspective view showing the cell assembly of the second embodiment.
9 is a perspective view showing the booth bar assembly member of the second embodiment.
10 is an exploded perspective view showing the booth bar assembly member of the second embodiment.

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.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a battery pack for an automobile in which packaging efficiency is improved by a connection structure of a sensing board and a bus bar according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view showing the first embodiment of the present invention. FIG. 3 is a perspective view showing the cell assembly of the first embodiment. FIG. to be.

1 to 3, a first embodiment of the present invention includes a cell assembly A in which a plurality of battery cells 200 are connected to each other, and a housing 100 that houses the cell assembly A do.

The housing 100 includes an outer case 120 in which the three assemblies are accommodated and a cover 110 that seals the upper portion of the outer case 120.

The cover 110 includes a handle 140 which is received in a depressed groove in the upper surface and is rotatably fixed up and down, a starter connector 130 to which a starter plug (not shown) . The battery cell 200 can be formed. Also, although not shown in the drawing, the power supply terminal is electrically connected to the inner cell assembly A to output negative and positive power sources, respectively. At this time, the power supply terminal can be sealed by the terminal cover 111 which is detachable from the upper surface of the cover 110.

The cover 110 may further include a display unit 112 for displaying the polarity of the terminal on the lower side of the terminal cover 111.

The outer case 120 forms an upright wall at each side of the bottom plate 610 to form an empty space in which the cell assembly is received. In addition, the outer case 120 and the cover 110 are provided with a plurality of coupling holes (not numbered) which are mutually coinciding with each other, and are fastened together by inserting fastening means (not shown) such as screws.

Here, the outer case 120 may include a plurality of heat dissipating holes 121 so as to discharge the inner heat to the outside. The discharge hole 121 is formed to pass through and discharges the heat generated from the cell assembly A housed inside.

The cell assembly A includes a plurality of battery cells 200, a plurality of bus bars 500 connected to be electrically connected between the battery cells 200, A sensing board 300 having a sensing sensor (not shown) for guiding the bus bar 500, an inner case 600 for accommodating the battery cells 200, A circuit board 400 on which a BMS (Battery Management System) for detecting abnormality is mounted, and a support plate 700 for supporting the circuit board 400.

The bus bar 500 and the sensing board 300 will be described with reference to FIGS. 4 and 5. FIG.

FIG. 4 is an exploded perspective view showing the cell assembly of the first embodiment, and FIG. 5 is a plan view showing the sensing board of the first embodiment.

4 and 5, the bus bar 500 includes a first bus bar 510 connected between terminals having different polarities of the battery cells 200, and a second bus bar 510 connected between the outermost battery cells 200 And a second bus bar 520 and a third bus bar 530 connected to the circuit board 400.

The first bus bar 510 connects terminals for outputting a positive (+) and negative (-) power source in the adjacent battery cells 200, respectively. For example, the first bus bar 510 is connected between positive (+) terminals of one battery cell 200 and negative (-) terminals of the other battery cell 200 and connected to adjacent battery cells 200 ) In series (parallel).

The second bus bar 520 and the third bus bar 530 connect the positive terminal 211 and the negative terminal 211 of the outermost battery cells 210 and 220 to the circuit board 400 . For example, the second bus bar 520 connects between the positive terminal of the battery cell 200 located on the outermost side (uppermost side) 220 and the circuit board 400, The bus bar 530 connects between the negative terminal of the battery cell 200 located on the outermost side (the lowermost side) 210 and the circuit board 400.

The sensing board 300 includes a sensing substrate 310 and a board fixing means 320 for fixing the sensing substrate 310 to one surface of the inner case 600.

The sensing substrate 310 includes at least one incision groove 311 formed at one side thereof, an insertion hole 313 extended in one direction, a vent hole 312 aligned with the vent hole 212, And a plurality of fixing holes 314 communicating with the board fixing means 320.

The cutout groove 311 is formed at one side along the position of the power supply terminal of the battery cell 200 located on the outermost side of the battery cells 200. For example, the cutout groove 311 is formed in a position where the positive (+) terminal of the battery cell 220 located on the uppermost side of the battery cells 200 is located on the right side, and the positive terminal of the battery cell 210 located on the lowermost side The second bus bar 520 and the third bus bar 520 are connected to the positive and negative terminals of the uppermost and the lowermost sides 220 and 210 respectively when the negative terminal is positioned on the right side, And may be determined according to the connection direction of the bus bar 530.

The insertion port 313 is opened to allow insertion of the first bus bar 510 connecting between the different power supply terminals 211 of the different battery cells 200 and is opened to extend by a predetermined distance. For example, when the first to fourth battery cells 210 to 220 are sequentially stacked, the negative terminal of the first battery cell 210 and the positive terminal of the second battery cell The first bus bar 510 connecting the terminals is inserted through the insertion port 313 and connected.

A plurality of vent holes 312 are formed in the battery cells 200 so that the vent holes 212 for discharging the gas to the outside can communicate with the outside.

A plurality of sensor holes 315 are sequentially formed so that sensors electrically connected to the patterns formed on the sensing substrate 310 can be positioned. Here, the sensor hole 315 may be formed by a sensor attached and / or fixed by a bonding means such as a harness / wire / cable or the like connected to a pattern extending from an adjacent position to the inside of the battery cell 200 And is formed so as to be in contact with the bus bar 500 to sense a voltage or a current.

Here, the sensor may include at least one of a sensor for sensing the temperature and voltage of the battery cell 200, and the like. Also, the pattern structure of the sensor and the sensing substrate is generally known, and detailed description and drawings are omitted.

In addition, the sensing substrate 310 may further include a connector (not shown) connected to the pattern on one side. A cable for transmitting a signal to the BMS of the circuit board 400 is fastened to the connector of the sensing substrate 310. Such connectors and cables are generally known in the art and their explanation and drawings are omitted.

The fixing hole 314 is formed so as to be coincident with a hole formed inside the fixing die 320 of the board fixing means 320 fixed to one surface of the inner case 600.

The board fixing means 320 includes a fixing base 320 to which a plurality of fixing pins 320 are fixed on one surface of the inner case 600 and a fixing hole 314 of the sensing substrate 310, And fixing means (not shown) fastened to the formed holes.

Here, the fixing die 320 is formed to protrude from the outer surface of the inner case 600, and a hole is formed therein so that fixing means (not shown) can be fastened. Therefore, the fixing base 320 can support the sensing substrate 310 so as to be spaced apart from one surface of the inner case 600.

That is, the sensing substrate 310 is fixed to the outer surface of the inner case 600, and the first to third busbars 510 to 530 are fixed to the outer surface of the inner case 600 while the sensing substrate 310 is fixed to the outer surface of the inner case 600 The battery cell 200, the battery cell 200, the outermost battery cell 200, and the circuit board 400 so as to be energized. The assembling process of the bus bar 500 can be facilitated because the bus bar 500 can be inserted through the insertion hole 313 and the cutout groove 311 formed in the sensing substrate 310.

The inner case 600 is fixed to the inner side of the housing 100 to receive the battery cells 200 and supports the support plate 700 supporting the circuit board 400.

The structure of the inner case 600 and the support plate 700 will be described with reference to FIG. 6 is a perspective view showing the inner case and the support plate of the first embodiment.

Referring to FIG. 6, the inner case 600 includes a side plate 620 and a bottom plate 610 that are erected from both sides, respectively. That is, the inner case 600 is opened in the front and rear directions and forms a space for accommodating the battery cell 200 through the both side plates 620 and the bottom plate 610.

The side plate 620 is formed upright on both side edges of the bottom plate 610 and includes a heat dissipation hole 621 for dissipating heat generated in the battery cell 200 and a hole A plurality of fastening protrusions 623 formed and side-restricting protrusions 622 bent at both ends thereof.

The heat dissipating port 621 is opened at the side plate 620 to dissipate the heat generated in the battery cell 200 to the outside. More preferably, the plurality of heat dissipation holes 121 may be formed in the outer case 120 of the housing 100 so that the heat dissipation holes 621 can communicate with the heat dissipation holes 621.

The side restricting tabs 622 are formed at both ends of the side plate 620 so as to prevent the battery cells 200 housed inside from being detached. Here, at least one hole 622a may be formed so that the fixing boss 320 is fastened to the side bracing tongue 622.

The bottom plate 610 includes a bottom opening 611 formed through the center portion and a lower boss 612 protruding from the front and rear sides so that the inner battery cell 200 is not detached.

The support plate 700 includes a support substrate 710 and a support opening 720 formed at the center of the support substrate 710.

The supporting substrate 710 includes a plurality of fixing protrusions 711 protruding sideways so as to form holes corresponding to the holes of the coupling protrusions 623 of the inner case 600, (Not shown) is fastened.

The fixing protrusions 711 protrude outward from the respective sides of the supporting substrate 710 and come into close contact with the fixing protrusions 623. Here, the fixing protrusion 711 is formed with a hole that coincides with the hole of the fastening protrusion 623, and fastening means (not shown) is inserted into the hole.

The first embodiment of the present invention includes the above-described configuration. Hereinafter, a packaging process that can be more easily assembled and capable of increasing the space utilization through the above-described configuration will be described.

First, the operator sequentially stacks the battery cells 200 inside the inner case 600. At this time, the battery cells 200 are stacked so that the power supply terminals 211 are all located in the same direction. That is, the power source terminal 211 and the vent hole 212 of the battery cells 200 are stacked to be exposed through a front surface opened in the inner case 600.

Since the battery cells 200 are supported by the lower boss 612 and the side bosses 622 of the inner case 600, the battery cells 200 are prevented from being separated by external vibration or impact.

The worker fixes the support plate 700 on the upper end of the inner case 600 and fixes the circuit board 400 on the upper side of the support plate 700. At this time, the fixing protrusions of the support plate 700 are stacked on the fixing protrusions 623.

The operator also fixes the support plate 700 to the upper end of the inner case 600 by inserting fixing means (not shown) into the fixing protrusions and the fixing protrusions 623.

Then, the worker stacks the circuit board 400 on the upper end of the support plate 700 and fixes and fixes fixing means (not shown).

The sensing substrate 310 is closely attached to the side bump 622 in the direction in which the power supply terminal 211 of the battery cells 200 is positioned in the inner case 600 after the fixing bump 320 is connected, (Not shown) is fastened to one side of the inner case 600 as it is fastened to the stationary main body 320 through the fixing hole 314. At this time, the sensing substrate 310 is fixed in a state spaced apart from the inner case 600 according to the length of the fixing die 320.

When the installation of the sensing substrate 310 is completed, the operator connects the bus bars 500. That is, the first bus bar 510 is fixed to connect between the power terminals 211 of the battery cells 200 and the positive (+) and negative (-) terminals of the battery cell 220, The second bus bar 520 is connected to one of the power terminals of the battery cell 210 and the third bus bar 520 is connected to either the positive or negative power terminal of the lowermost battery cell 210. [ 530 are connected.

At this time, the first bus bar 510 is inserted through the insertion port 313, the second bus bar 520 is inserted into the cutting groove 311 located at one side, and the third bus bar 530 is inserted through the incision Respectively, and are connected to the power terminals of the target cells 210 and 220, respectively.

Here, the sensing substrate 310 of the present invention does not require a separate sensor assembly operation as the sensors are integrated. That is, the sensors are fixed to the sensing substrate 310 so as to be oriented toward the inner case 600 through the sensor holes 315, and the sensors are connected to the sensor substrate through a pattern formed on the sensor substrate and a connector And is connected to the BMS of the circuit board 400.

Accordingly, after fixing the sensing substrate 310, the operator can connect the cable between the connector on the sensing substrate 310 and the connector on the circuit board 400, thereby enabling signal transmission between the sensor and the BMS.

Therefore, when the operator completes the assembly of the cell assembly and assembles the cover 110 after housing the inner case 600 accommodating the completed cell assembly A inside the outer case 120, Is completed.

The present invention also includes a second embodiment including a booth bar assembly member 800 so as to divide the booth bar in the packaging method of the first embodiment and connect the divided booth bars. Such a second embodiment will be described with reference to Figs. 7 to 10. Fig. Here, the same components as those of the first embodiment are denoted by the same names and reference numerals, but redundant contents may be omitted.

FIG. 7 is a perspective view showing a second embodiment of the present invention, FIG. 8 is a perspective view showing a cell assembly of a second embodiment of the present invention, FIG. 9 is a perspective view showing a booth bar assembly member of the second embodiment, Is an exploded perspective view showing the booth bar assembly member of the second embodiment.

7 to 10, the second embodiment includes a cell assembly in which a plurality of battery cells 200 are interconnected, and a housing 100 that houses the cell assembly.

The housing 100 includes an outer case 120 in which the cell assembly A is accommodated and a cover 110 for sealing the upper portion of the outer case 120.

The cover 110 includes a handle 140 received in a groove recessed in the upper surface and fixed to be rotatable up and down, a starter connector 130 to which a starter plug extending from the starter of the car is fastened, A terminal cover 111 which is detachable from the upper surface of the cover 110 to close the power terminal, and a power supply terminal (not shown) which outputs polarities (+, -) from the lower side of the terminal cover 111 And a display unit 112 for displaying an image.

The outer case 120 forms an empty space in which the cell assembly A is accommodated and includes a plurality of heat dissipation holes 121 penetrating the wall surface to dissipate heat therein.

The cell assembly A includes a plurality of battery cells 200, a plurality of bus bars 500 connected to be electrically energized between the battery cells 200, a bus bar assembly 500 for fixing the bus bars 500, A sensing board 300 having a sensor 800 for detecting the voltage and temperature of each battery cell 200 and guiding the bus bar 500 and an inner case 600 for receiving the battery cells 200 A circuit board 400 on which a BMS for detecting cell balancing and abnormality of the battery cells 200 is mounted, and a support plate 700 for supporting the circuit board 400.

The sensing board 300 includes a sensing substrate 310 and a board fixing means 320 for fixing the sensing substrate 310 to one surface of the inner case 600.

The sensing substrate 310 includes at least one incision groove 311 formed at one side thereof, an insertion hole 313 formed to extend through one direction, a vent hole 312 aligned with the vent hole 212, A sensor hole 315 to be installed, and a plurality of fixing holes 314 communicating with the board fixing means 320. Here, the sensing substrate 310 may further include a pattern and a connector connected to the pattern so as to transmit signals sensed by a plurality of sensors provided on the sensor hole 315.

The bus bar 500 includes a plurality of first busbars 510 connected between terminals of different polarities of the battery cells 200 and a plurality of second busbars 510 connected to the outermost battery cells 210, And a second bus bar 520 and a third bus bar 530 connected to the second bus bar 400.

The first bus bar 510 connects the power terminals 211 outputting positive and negative power from the adjacent battery cells 200, respectively. For example, the first bus bar 510 connects the positive terminal of one battery cell and the negative terminal of the other battery cell 200 to connect the adjacent battery cells 200 in series (Parallel).

The second bus bar 520 and the third bus bar 530 connect the positive or negative terminal of the outermost battery cell 210 to the circuit board 400. For example, the second bus bar 520 connects between the positive terminal of the battery cell 220 located on the outermost side (uppermost side) and the circuit board 400, and the third bus bar 530 connect between the negative terminal of the battery cell 210 located on the outermost side (the lowermost side) and the circuit board 400.

Here, at least one of the second bus bar 520 and the third bus bar 530 may be divided and fastened by the bus bar assembly member 800. Hereinafter, the third bus bar 530 is described as an example in which the third bus bar 530 is divided. However, the second bus bar 520 is also divided and assembled by the bus bar assembly member 800.

The third bus bar 530 may be divided into a first split bar 531 and a second split bar 532, as shown in FIG.

The first dividing bar 531 has a first horizontal portion 531a extending horizontally to be connected to the circuit board 400 and a first bent portion 531b bent downward from the first horizontal portion 531a, And a plurality of first coupling holes 531c formed through the first horizontal portion 531a and the first bent portion 531b.

The first horizontal portion 531a is horizontally extended to be connected to the circuit board 400. [ Here, the first horizontal portion 531a is formed with a plurality of first coupling holes 531c and is electrically connected to the circuit board 400 so as to be electrically energized. That is, the first horizontal portion 531a is fixed to the pattern of the circuit board 400 by means of fixing means (not shown) which is inserted through the first coupling hole 531c.

The first bent portion 531b extends downward from the first horizontal portion 531a and is electrically connected to the second split bar 532 by the bus bar assembly member 800. [ Here, the first bent portion 531b has at least one first coupling hole 531c.

The second dividing bar 532 includes a second horizontal part 532a connected to one of the positive and negative terminals of the outermost battery cell 200 and a second horizontal part 532b bent upward at the end of the second horizontal part 532a, And at least one second engaging hole 532c.

Here, the second horizontal part 532a may be bent at least once in the horizontal direction. Such deformation of the shape can be deformed according to the position of the outermost battery cell 210 to be connected.

The second bent portion 532b is upwardly bent at the end of the second horizontal portion 532a and is electrically connected to the first bent portion 531b by the bus bar assembly member 800. [

In addition, at least one second coupling hole 532c is formed in the second horizontal portion 532a and the second bent portion 532b. For example, the second coupling hole 532c is formed at the end of the second horizontal portion 532a and connected to the power terminal of the outermost battery cell 200. [ Or the second engaging hole 532c formed at the end of the second bent portion 532b may be connected to fixing means (not shown) inserted through the bus bar assembling member 800.

The bus bar assembly member 800 includes a conductive plate 830 as a conductive metal plate which is in close contact with the first and second split bars 531 and 532 so as to energize both sides of the first split bar 531 and the second split bar 532, And includes a first assembly plate 810 and a second assembly plate 820 which are mutually coupled to receive the split bar 532 and the conductive plate 830 therein.

The first assembly plate 810 is a plate extending in the longitudinal direction and having a first bent portion 531b of the first split bar 531 and a second bent portion 532b of the second split bar 532, A plurality of pressing projections 812 protruding from both sides of the first plate member 811 and a plurality of pressing projections 812 projecting from the positions coinciding with the first and second engaging holes 531c and 532c And a plurality of first plate holes 813 formed through the through holes.

The first plate member 811 is a plate member that extends in the longitudinal direction and is pressed by one side of the first bent portion 531b and the second bent portion 532b by the pressure applied by the pressing protrusion 812 and / Respectively.

The pressing protrusions 812 are formed so as to be rotatable by protrusions and elastic forces on both side edges of the first plate member 811. Accordingly, the pressing projection 812 is rotated in the outward direction while the end of the pressing projection 812 is in close contact with the second assembly plate 820, and is then positioned by the elastic force to press the back surface of the second assembly plate 820.

The first plate hole 813 is formed at a position coinciding with the first and second coupling holes 531c and 532c of the first bent portion 531b and the second bent portion 532b, .

The second assembly plate 820 includes a second plate member 821 extending in one direction so as to be in close contact with the opposite surface of the first bent portion 531b and the second bent portion 532b, At least one pair of fitting protrusions 822 protruding from the first plate hole 813 and supporting the first bent portion 531b and the second bent portion 532b sandwiched therebetween, And includes a through-formed second plate hole 823.

The second plate member 821 extends in the longitudinal direction and is in close contact with one surface of the conductive plate 830. That is, the second plate member 821 is pressed against the conductive plate 830 and the first bent parts 531b and the second bent parts 531b positioned between the first plate members 811 by the pressure applied while the pressing projections 812 are fastened to the back surface, And presses the bent portion 532b.

The fitting protrusions 822 are formed on the upper and lower sides of the second plate member 821, respectively. The pair of fitting protrusions 822 are spaced apart from each other, and the first bent portion 531b and the second bent portion 532b are sandwiched therebetween.

At least one second plate member 823 is formed on the upper and lower sides of the second plate member 821 and includes a first plate hole 813 and a first coupling hole 531c or a second coupling hole 532c, A fixing means (not shown) for connecting the conductive plate 830 is fastened.

Here, as another embodiment, a passage communicating from the first plate hole 813 to the second plate hole 823 forms a hollow space in which no fixing means (not shown) is fastened and the third bus bar 530 in order to dissipate the heat transmitted through the heat exchanger.

At this time, the conductive plate 830, the first bent portion 531b and the second bent portion 532b are not fastened by separate fastening means (not shown) but the first plate member 811 and the second plate member 821 by only the pressing force of the pressing protrusion 812.

Alternatively, the conductive plate 830, the first bent portions 531b and the second bent portions 532b may be fastened by fixing means (not shown) A second engaging hole 823, and a first engaging hole 531c and a second engaging hole 532c.

The conductive plate 830 includes a head portion 831 that is in close contact with the first bent portion 531b, a tail portion 832 that is in close contact with the second bent portion 532b, and a head portion 831 and a tail portion 832 And an extension 833 extending therebetween.

The head portion 831 is formed by cutting a first side of the head portion 831 and communicating with a fixing means (not shown), and is positioned between one side of the second plate member 821 and the first bent portion 531b. The head 831 is in close contact with the first bent portion 531b while the first plate 811 and the second plate 821 are pressed by the pressing protrusion 812 and the fixing means ).

The tail portion 832 has a second groove 832a cut upward from the lower side and is positioned between one side of the second plate 821 and the second bent portion 532b. The tail portion 832 is brought into close contact with the second bent portion 532b when the pressing projection 812 of the first assembly plate 810 is fastened to the second plate member 821. [ Here, the second groove 832a is cut upward so as to communicate the fixing means (not shown) inserted through the second engaging hole 532c and the first plate hole 813.

The extension portion 833 is connected between the head portion 831 and the tail portion 832 to enable electrical conduction between the first bent portion 531b and the second bent portion 532b.

The present invention includes the above-described second embodiment. Hereinafter, an operation effect that the packaging process according to the second embodiment can be easily performed will be described.

The operator installs the sensing substrate 310 after the battery cells 200 are housed in the inner case 600 through the same process as the first embodiment and the first and second busbars 510 and 520 Are connected to the battery cells 200 through the insertion opening 313 and the cutout groove 311 of the sensing substrate 310, respectively.

The operator connects the first horizontal part 531a of the first divided bar 531 to the circuit board 400 and connects the second horizontal part 532a of the second divided bar 532 to the outermost side Side of the battery cell 210. At this time, the first bent portion 531b of the first split bar 531 and the second bent portion 532b of the second split bar 532 are separated from each other.

The operator places the conductive plate 830 on the inner surface of the second plate member 821 and inserts the first split bar 531 between the upper fitting projections 822 of the second plate member 821, The bar 532 is inserted between the fitting projections 822 formed on the lower side of the second plate member 821. [

The operator closely contacts the first plate member 811 and the second plate member 821 to fasten the first assembly plate 810 and the second assembly plate 820. At this time, when the first force is applied, the pressing projection 812 rotates outward and then returns to the original position by the elastic force and presses the back surface of the second plate material 821.

Or the worker presses the first plate member 811 and the second plate member 821 against each other while the fixing means (not shown) is inserted through the first plate hole 813 or the second plate hole 823 It is also possible.

In addition, when the first assembly plate 810 and the second assembly plate 820 are fastened to each other through the above-described process, the operator can use fixing means (not shown) to communicate the first and second plate holes 823 Insert and fix.

The second embodiment described above divides the third bus bar 530 having the longest length among the bus bars 500 used in the battery pack and sequentially interconnects them, Can be improved.

In addition, although the distance between the outermost cell 210 and the circuit board 400 is different from the length of the bus bar due to the formation of the bus bars 500 in the second embodiment of the present invention, And the second split bar 532 can be compensated as the conductive plate 830. That is, the second embodiment can improve both workability and assemblability.

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.

100: housing 110: cover
111: terminal cover 112: display portion
120: outer case 121:
130: battery cell 200: battery cell
300: sensing board 310: sensing substrate
311: incision groove 312: vent hole
313: insertion port 314: stationary hole
315: sensor hole 320: board fixing means, fixing station
400: circuit board 500: bus bar
510: first bus bar 520: second bus bar
530: third bus bar 531: first split bar
531a: first horizontal part 531b: first bend part
531c: first coupling hole 532: second split bar
532a: second horizontal part 532b: second bent part
532c: second coupling hole 600: inner case
610: bottom plate 611: bottom opening
612: Lower bust 620: Side plate
621: heat radiating hole 622:
623: fastening protrusion 700:
710: Support substrate 720: Support opening
800: Booth bar assembly member 810: First assembly plate
811: first plate member 812: pressing projection
813: first plate hole 820: second assembly plate
821: second plate member 822:
823: second plate hole 830: conductive plate
831: head portion 831a: first groove
832: tail portion 832a: second groove
833: Extension

Claims (9)

A housing having an outer case which is hermetically sealed by a cover having a connector to which a starter plug extending from the starter is fastened;
An inner case housing a plurality of battery cells inside the outer case;
A circuit board on which a BMS (Battery Management System) for sensing cell balancing and abnormal voltages of the battery cells is mounted;
A plurality of bus bars that electrically connect the battery cells and the battery cells, between the outermost battery cells and the circuit board so as to be electrically energized; And
A plurality of sensors for sensing the battery cells are integrated, and a sensing board fixed to the inner case in a spaced apart state to guide the bus bars, Improved car battery pack.
The apparatus of claim 1, wherein the sensing board
A plurality of insertion openings penetrating the first busbars connected between adjacent battery cells to be inserted;
At least one incision groove laterally incised so that any one of the second and third busbars connected to the outermost battery cells may be pulled out from the outside; And
A plurality of sensor balls to which the sensor is fixed; Wherein the packaging efficiency of the battery pack is improved by the connection structure of the sensing board and the bus bar.
2. The apparatus according to claim 1, wherein the inner case
Wherein a space for accommodating the battery cells is formed by the upright side plates on both sides of the bottom plate, and packaging efficiency is improved by the connection structure of the sensing board and the bus bar.
4. The apparatus according to claim 3,
Wherein the packaging structure includes a sensing board and a bus bar. The battery pack includes a sensing board and a bus bar.
The apparatus of claim 3, wherein the bottom plate
And a lower support jaw that prevents upward detachment of the battery cells housed in the battery pack, and improves packaging efficiency by the connection structure of the sensing board and the bus bar.
The method according to claim 1,
Wherein one of the bus bars is divided into a first partition bar connected to the circuit board and a second partition bar connected to the outermost battery cell,
And a bus bar assembly member connecting the first split bar and the second split bar to each other so as to be energized, wherein packaging efficiency is improved by the connection structure of the sensing board and the bus bar.
The apparatus according to claim 1, wherein the bus bar assembly member
A conductive plate which is brought into close contact with the first and second split bars as a conductive metal plate to energize both sides; And
A sensing board including a first assembling plate and a second assembling plate which are mutually coupled to receive the first dividing bar, the second dividing bar and the conducting plate inside, and a connecting structure between the sensing board and the bus bar, Battery pack.
[8] The apparatus of claim 7, wherein the first assembly plate is a plate member extending in the longitudinal direction, the first plate member pressing the one side of the first division bar and the second division bar on one side thereof; And
A plurality of pressing protrusions protruding from both sides of the first plate to press the back surface of the second plate; Wherein the packaging efficiency of the battery pack is improved by the connection structure of the sensing board and the bus bar.
8. The apparatus of claim 7, wherein the second assembly plate
A second plate for pressing the opposite side of the first split bar and the second split bar; And
And at least a pair of fitting protrusions protruding from both side edges of the second plate and sandwiching the first and second split bars therebetween, Automotive battery pack with improved efficiency.

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