WO2018124368A1

WO2018124368A1 - Battery pack

Info

Publication number: WO2018124368A1
Application number: PCT/KR2017/000896
Authority: WO
Inventors: 강원구
Original assignee: 한화지상방산(주)
Priority date: 2017-01-02
Filing date: 2017-01-25
Publication date: 2018-07-05
Also published as: KR102259252B1; KR20180079761A

Abstract

According to one embodiment of the present invention, disclosed is a battery pack comprising: a housing including a cooling air inlet and outlet; a plurality of battery cells arranged in the housing, spaced apart at a predetermined interval from each other in a first direction, and belonging to different groups; and a distribution plate located at an upper or lower part of the plurality of battery cells and distributing cooling air to the plurality of battery cells, wherein the distribution plate comprises: a first opening/closing plate including first opening parts; and a second opening/closing plate which includes second opening parts and of which at least a portion is overlapped with the first opening/closing plate, wherein the first opening/closing plate and the second opening/closing plate have different shapes, respectively move to a direction parallel to the first direction, and independently distribute the cooling air to each group.

Description

Battery pack

Embodiments of the present invention relate to a battery pack.

Battery packs in which several battery cells are installed are used in various industrial fields. In particular, as a hybrid vehicle and an electric vehicle are actively developed in recent years, battery packs have been used as energy sources of power devices of vehicles. Meanwhile, when the battery pack is operated, internal battery cells generate heat, and when the battery cells are exposed to high temperature for a long time due to such heat generation, the performance and lifespan of the battery pack are deteriorated. Therefore, a technique for lowering the temperature of battery cells is generally disclosed. In Korean Patent Laid-Open No. 2011-0132793, a technique capable of efficiently dissipating heat generated in a battery cell using cooling water is disclosed.

However, since a conventional battery pack cools the internal battery cells as a whole, when a temperature deviation occurs between the battery cells, it is difficult to efficiently reduce it, and the performance of the battery pack may be degraded by the temperature deviation between the battery cells. .

Embodiments of the present invention provide a battery pack that minimizes temperature variations between battery cells.

One embodiment of the present invention comprises a housing comprising a cooling air inlet and outlet; A plurality of battery cells disposed in the housing, spaced apart from each other along a first direction, and belonging to different groups; And a distribution plate positioned above or below the plurality of battery cells and distributing the cooling air to the plurality of battery cells, wherein the distribution plate comprises: a first opening / closing plate including first openings; And a second opening and closing plate including second openings and at least partially overlapping the first opening and closing plate, wherein the first opening and closing plate and the second opening and closing plate have different shapes from each other, and are parallel to the first direction. Disclosed is a battery pack capable of independently distributing the cooling air for each of the groups by moving to each other.

According to embodiments of the present invention, since cooling air may be supplied to each group including several battery cells, temperature variation between battery cells can be minimized.

In addition to the above, the effects of the present invention can be derived from the following description with reference to the drawings.

1 is a cross-sectional view schematically showing an example of a battery pack according to an embodiment of the present invention.

FIG. 2 is a block diagram schematically illustrating a configuration of the battery pack of FIG. 1.

3 is a perspective view schematically illustrating an example of the first opening and closing plate and the second opening and closing plate of FIG. 1.

4 to 11 are perspective views schematically illustrating a case in which cooling air is distributed for each group of FIG. 1.

12 is a perspective view schematically illustrating another example of the first opening and closing plate and the second opening and closing plate of FIG. 1.

13 is a schematic cross-sectional view of a modified example of the battery pack of FIG. 1.

According to an aspect of the present invention, a battery pack includes: a housing including a cooling air inlet and an outlet; A plurality of battery cells disposed in the housing, spaced apart from each other along a first direction, and belonging to different groups; And a distribution plate positioned above or below the plurality of battery cells and distributing the cooling air to the plurality of battery cells, wherein the distribution plate comprises: a first opening / closing plate including first openings; And a second opening and closing plate including second openings and at least partially overlapping the first opening and closing plate, wherein the first opening and closing plate and the second opening and closing plate have different shapes from each other, and are parallel to the first direction. Each can be moved to separately distribute the cooling air for each of the groups.

In the present embodiment, the length of the first opening and closing plate along the first direction may be longer than the length of the second opening and closing plate along the first direction.

In the present exemplary embodiment, the first opening / closing plate may include a plurality of first ribs between both sides of the first opening / closing plate and the first openings, and at least one of the first ribs may have a remaining first rib. It may be a wide rib larger than the width of the field.

In the present embodiment, the width of the wide rib in the first direction may be equal to the sum of the width of any one of the remaining first ribs and the width of any one of the first openings.

In the present exemplary embodiment, each of the plurality of groups may include N battery cells, and the wide rib may be a first rib positioned N-th from one side of the first opening / closing plate among the first ribs.

In the present embodiment, at least one of the second openings may be a wide opening larger than the width of the remaining second openings.

In the present exemplary embodiment, the width of the wide opening along the first direction may include a width of the wide rib along the first direction and a width of a pair of the first openings disposed on both sides of the wide rib. It can be equal to the sum.

In the present exemplary embodiment, the widths of the second openings and the first openings except for the wide openings may be equal to a distance between two adjacent battery cells among the plurality of battery cells.

In the present exemplary embodiment, the second opening / closing plate may include second ribs between the second openings, and each of the widths of the remaining first ribs and the widths of the second ribs may be along the first direction. It may be equal to the thickness of each of the plurality of battery cells.

In the present embodiment, at least one of the first opening and closing plate and the second opening and closing plate may move along a second direction perpendicular to the first direction on the same plane.

In this embodiment, the measuring unit for measuring the temperature of the plurality of battery cells; A driving unit driving the first opening / closing plate and the second opening / closing plate; And a controller configured to control an operation of the driving unit according to the temperature information measured by the measuring unit.

According to another aspect of the present invention, a battery pack includes a housing including a cooling air inlet and an outlet; A plurality of battery cells disposed in the housing, spaced apart from each other along a first direction, and belonging to different groups; And a distribution plate positioned above or below the plurality of battery cells, the distribution plates configured to independently distribute the cooling air for each of the groups, wherein the distribution plates have different shapes from each other and have at least a portion thereof in a vertical direction. And a first opening / closing plate and a second opening / closing plate, wherein the first opening / closing plate includes a plurality of first ribs and a plurality of first openings between the plurality of first ribs. At least one of the ribs is a wider rib larger than the width of the remaining first ribs, the second opening / closing plate includes a plurality of second ribs and a plurality of second openings between the plurality of second ribs, At least one of the second openings may be a wide opening larger than the width of the remaining second openings.

In the present embodiment, the first opening and closing plate and the second opening and closing plate may move along the first direction, respectively.

In the present exemplary embodiment, the second opening / closing plate may be positioned on an upper surface of the first opening / closing plate, and the first opening / closing plate may move along a second direction perpendicular to the first direction on the same plane.

In the present embodiment, the width of the wide opening along the first direction is the width of the wide rib along the first direction and the width of the pair of first openings disposed on both sides of the wide rib, respectively. It can be equal to the sum.

In the present embodiment, each of the widths of the remaining first ribs and the widths of the second ribs except the wide ribs may be equal to the thickness of each of the plurality of battery cells along the first direction.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are only used to distinguish one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, in each drawing, components are exaggerated, omitted, or schematically illustrated for convenience and clarity of description, and the size of each component does not entirely reflect the actual size.

In the description of each component, when described as being formed on or under, both on and under are formed either directly or through other components. And on and under criteria will be described with reference to the drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the following description with reference to the accompanying drawings, the same or corresponding components will be given the same reference numerals and redundant description thereof will be omitted. do.

1 is a cross-sectional view schematically showing an example of a battery pack according to an embodiment of the present invention, FIG. 2 is a block diagram schematically showing the configuration of the battery pack of FIG. 1, and FIG. 1 is a perspective view schematically showing an example of the first opening and closing plate and the second opening and closing plate.

1 to 3, a battery pack 10 according to an embodiment of the present invention includes a housing 100, a plurality of battery cells 200 disposed in the housing 100, and a plurality of battery cells ( It may include a distribution plate 300 for distributing the cooling air to 200. In addition, the battery pack 10 includes a measurement unit 150 for measuring temperatures of the plurality of battery cells 200, a driving unit 400 for driving the distribution plate 300, and temperature information measured by the measurement unit 150. It may include a control unit 160 for controlling the operation of the drive unit 400 by.

The housing 100 includes a cooling air inlet 110 and an outlet 120. As an example, the cooling air inlet 100 is disposed above the plurality of battery cells 200, and the cooling air outlet 120 is disposed below the plurality of battery cells 200, and the inlet 110 and the outlet 120 are disposed. ) May be positioned in a diagonal direction with respect to the plurality of battery cells 200 to improve cooling efficiency.

The housing 100 accommodates a plurality of battery cells 200 therein, and for this purpose, a fixing part (not shown) for fixing the battery cells 200 may be installed in the housing 100. In addition, the housing 100 may be continuously formed with the cooling air outlet 120, and may include a space for accommodating a distribution plate 300 positioned below the plurality of battery cells 200, and the distribution plate ( The driving unit 400 for the movement of the 300 and the support for supporting the distribution plate 300 may be disposed.

Each of the plurality of battery cells 200 may be a rechargeable battery capable of charging and discharging. Each of the plurality of battery cells 200 may include an electrode assembly therein. The electrode assembly may include a first electrode plate and a second electrode plate to which the electrode active material is applied and have different polarities, and a separator interposed therebetween. As an example, the electrode assembly may be manufactured by winding the first electrode plate, the separator, and the second electrode plate sequentially to form a jellyroll, and in another example, the first electrode plate, the separator, and the second electrode plate may be sequentially It may be a laminated stack. For example, each of the plurality of battery cells 200 may be a lithium ion secondary battery, but is not limited thereto.

The plurality of battery cells 200 may be disposed to be spaced apart from each other by a predetermined distance G in the first direction X in the housing 100, and cooling air may be formed between the plurality of battery cells 200. The battery cells 200 may be cooled while flowing in a direction parallel to the direction Z. FIG.

Meanwhile, according to the present invention, the plurality of battery cells 200 may be divided into a plurality of groups A, B, and C. Each of the plurality of groups A, B, and C may include a plurality of battery cells 200. For example, the plurality of battery cells 200 illustrated in FIG. 1 may be divided into three groups A, B, and C, and may be independently supplied with cooling air for each group A, B, and C. Referring to FIG. have. Therefore, when the battery cell 200 at a specific position among the battery cells 200 is overheated, intensive cooling is possible by increasing the flow rate of the cooling air supplied to the overheated battery cell 200, thereby providing a plurality of battery cells ( It is possible to minimize the temperature deviation between the 200). To this end, a distribution plate 300 for distributing cooling air independently for each group A, B, and C may be located at the top or the bottom of the plurality of battery cells 200.

The distribution plate 300 may include a first opening and closing plate 310 and a second opening and closing plate 320 at least partially overlapping each other. For example, FIG. 1 illustrates that the first opening / closing plate 310 and the second opening / closing plate 320 are positioned under the plurality of battery cells 200, but are not limited thereto. The 310 and the second opening and closing plate 320 may be positioned above the plurality of battery cells 200.

The first opening and closing plate 310 includes first openings 314 and first ribs 312. The first openings 314 and the first ribs 312 are alternately disposed. In addition, both ends of the first ribs 312 aligned side by side with the second direction Y perpendicular to the first direction X may have a pair of first connectors 316 extending along the first direction X. FIG. Can be connected by That is, the first opening and closing plate 310 may be understood that a plurality of first openings 314 are formed in the flat plate.

The width W13 of each of the first openings 314 between the first ribs 312 may be greater than or equal to the gap G between two adjacent battery cells 200 among the battery cells 200. Here, the width W13 of the first opening 314 means a width along the first direction X. FIG. For example, the width W13 of each of the first openings 314 may be equal to the distance G between two adjacent battery cells 200 among the battery cells 200.

The first ribs 312 may be located between the first openings 314 and at both sides of the first opening / closing plate 310. The width W12 of each of the first ribs 312 may be equal to or less than the thickness T of the battery cell 200 in the first direction X. FIG. For example, the width W12 of the first rib 312 may be equal to the thickness T of the battery cell 200. When the first rib 312 is positioned between two adjacent battery cells 200, the flow of cooling air may be blocked between two adjacent battery cells 200.

At least one of the first ribs 312 may be a wide rib 312w. The wide rib 312w has a width W11 that is larger than the width W12 of the remaining first ribs 312. For example, the width W11 of the wide rib 312w is the remaining first rib 312. It may be equal to the sum of the width W12 and the width W13 of the first opening.

Meanwhile, when the plurality of groups A, B, and C each include N battery cells 200, the wide ribs 312w may be located at the N th from one side of the first opening / closing plate 310. . For example, when the plurality of groups A, B, and C each include three battery cells 200, the wide ribs 312w may be first ribs 312w positioned third.

The second opening and closing plate 320 may have a different shape from the first opening and closing plate 310. In addition, the length of the second opening and closing plate 320 along the first direction X may be shorter than the length of the first opening and closing plate 310.

The second opening / closing plate 320 includes second ribs 322 and second openings 324. The second ribs 322 and the second openings 324 are alternately disposed with each other, and both ends of the second ribs 322 aligned side by side with the second direction Y may face the first direction X. FIG. It may be connected by a pair of second connection portion 326 extending along. That is, the second opening and closing plate 320 may be understood that a plurality of second openings 324 are formed in the flat plate.

The width W23 of each of the second openings 324 may be equal to or greater than a distance G between two adjacent battery cells 200 among the battery cells 200. Here, the width W23 of the second opening 324 means a width along the first direction X. FIG. For example, the width W23 of each of the second openings 324 may be equal to the interval G between two adjacent battery cells 200 among the battery cells 200. When the second opening portion 324 and the first opening portion 314 overlap each other between two adjacent battery cells 200, the cooling air flows between two adjacent battery cells 200 to move two adjacent battery cells. 200 may be cooled.

Meanwhile, at least one of the second openings 324 may be the wide opening 324w. The wide opening 324w may have a width W21 larger than the width W23 of the remaining second openings 324. For example, the width W21 of the wide opening 324w is a pair of first openings disposed on both sides of the width W11 of the wide rib 312w along the first direction X and the wide rib 312w. 314 may be equal to the sum of the widths W13.

The second ribs 322 may be located between the second openings 324 and on both sides of the second opening / closing plate 320. The width W22 of the second rib 322 may be the same as the width W12 of the first rib 312. That is, the width W22 of the second rib 322 may be equal to or less than the thickness T of the battery cell 200 in the first direction X. FIG. For example, the width W12 of the second rib 322 may be equal to the thickness T of the battery cell 200. When the second rib 322 is positioned between two adjacent battery cells 200, the flow of cooling air may be blocked between the two adjacent battery cells 200.

The first opening and closing plate 310 and the second opening and closing plate 320 may overlap each other in the vertical direction, and may be moved in the direction parallel to the first direction X by the driving unit 400, respectively. In this case, the first rib 312, the first opening 314 and the wide rib 312w of the first opening and closing plate 310, the second rib 322 and the second opening 324 of the second opening and closing plate 320 are used. ) And the cooling air can be individually supplied to the plurality of groups A, B, and C by the overlap between the wide openings 324w. Specifically, the cooling air is supplied only to one or two groups of the plurality of groups A, B, and C, the cooling air is supplied to the entire groups A, B, and C, or the cooling air as a whole. The supply of can be cut off.

The measurement unit 150 may include a plurality of temperature sensors installed in the plurality of battery cells 200. The measuring unit 150 measures the temperature of the battery cells 200 and transmits the measured temperature to the controller 160. The temperature information transmitted to the controller 160 is used to control the driver 400 after the calculation by the controller 160.

As another example, the plurality of temperature sensors may not be installed in the battery cell 200, but may be installed on the inner surface of the housing 100, in which case the temperature sensor may be in a non-contact manner using infrared rays or the like. The temperature can be measured. Alternatively, the temperature sensors may measure the temperature of the space near the battery cell 200 or the temperature of the vicinity of the battery cell 200 in a portion inside the housing 100. In this case, the number of temperature sensors may be different from the number of battery cells 200.

The controller 160 receives the temperature information of the battery cells 200 measured by the measuring unit 150, and controls the driving of the driving unit 400 by using the temperature information. That is, the controller 160 calculates the measured temperature result from the measuring unit 150, and controls the driving unit 400 according to the result to position the first opening / closing plate 310 and the second opening / closing plate 320. Adjust it. For example, when the battery cell 200 at a specific position is overheated, by adjusting the positions of the first opening / closing plate 310 and the second opening / closing plate 320, respectively, the cooling air may be transferred to the overheated battery cell 200. The flow rate may be increased, thereby minimizing temperature deviation between the plurality of battery cells 200.

The controller 160 may be implemented as a circuit board on which circuit elements such as integrated circuit chips are mounted, or may be implemented in the form of a computer program stored in a main controller (not shown) of the battery pack 10.

The drive unit 400 may include a drive motor such as a step motor, a servo motor, a piezo motor, and a power transmission mechanism such as a rack and a pinion, and may include a pneumatic cylinder, a hydraulic cylinder, and the like. The driving unit 400 may move the first opening and closing plate 310 and the second opening and closing plate 320 in a direction parallel to the first direction X, respectively. In addition, at least one of the first opening / closing plate 310 and the second opening / closing plate 320 may be moved along the second direction Y perpendicular to the first direction X by the driving unit 400. have.

4 to 11 illustrate a first rib (312 of FIG. 3), a first opening (314 of FIG. 3), a wide rib (312w of FIG. 3) and a second opening / closing plate 320 of the first opening / closing plate 310. Cooling air for each of the plurality of groups A, B, and C by various combinations between the second ribs 322 of FIG. 3, the second openings 324 of FIG. 3, and the wide openings 324w of FIG. 3. Examples of supply or interruption are shown. More specifically, when the battery pack 10 of FIG. 1 includes three groups A, B, and C, FIGS. 4 to 11 supply cooling air for each of the three groups A, B, and C. Each of the eight cases that can be blocked is shown.

4 illustrates a case in which cooling air is supplied to all three groups A, B, and C, and FIG. 5 illustrates a case in which cooling air is shut off to all three groups A, B, and C.

FIG. 6 illustrates a case in which cooling air is supplied only to the first group A, and the second and third groups B and C block the cooling air, and FIG. 7 illustrates cooling air only into the second group B. The first and third groups A and C block the cooling air, and in FIG. 8, the first and second groups A and B block the cooling air, and only the third group C When cooling air is supplied.

In addition, in FIG. 9, the third group C blocks the cooling air and supplies cooling air to the first and second groups A and B. In FIG. 10, the second group B blocks the cooling air. And supplying cooling air to the first and third groups A and C, and in FIG. 11, the first group A blocks the cooling air and supplies cooling air to the second and third groups B and C. It is a state.

On the other hand, Table 1 below shows the values measured for the flow rate of the cooling air for each group (A, B, C) in the case of FIGS. In the following Table 1, 1 to 8 show the position order of the intervals between the battery cells 200 when nine battery cells 200 are arranged along the first direction (X in FIG. 1). For example, the number 1 means the interval between the first battery cell 200 and the second battery cell 200 disposed at the leftmost side in FIG. 1, that is, the first interval, and the number 2 indicates the second battery cell ( The interval between the second battery cell 200 and the third battery cell 200, that is, the second interval.

	1One	22	33	44	55	66	77	88
도 66	34%34%	33%33%	33%33%	00	00	00	00	00
도 77	00	00	25%25%	25%25%	25%25%	25%25%	00	00
도 88	00	00	00	00	00	34%34%	33%33%	33%33%
도 99	17%17%	17%17%	17%17%	17%17%	16%16%	16%16%	00	00
도 1010	17%17%	17%17%	17%17%	00	00	17%17%	16%16%	16%16%
도 1111	00	00	17%17%	17%17%	17%17%	17%17%	16%16%	16%16%

As can be seen in Table 1, the battery pack (10 of FIG. 1) according to the present invention is a plurality of groups (A, B) by the relative movement of the first opening and closing plate 310 and the second opening and closing plate 320 It can be seen that, optionally, cooling air can be supplied to C). This means that the first opening and closing plate 310 includes a wide rib (312w in FIG. 3) in addition to the first rib (312 in FIG. 3) and the first opening (314 in FIG. 3), and the second opening and closing plate 320 is also formed in the first opening (310). It is because various combinations are possible by including the wide opening (324w in FIG. 3) in addition to the two ribs (322 in FIG. 3) and the second opening (324 in FIG. 3).

Although not shown, at least one of the first opening / closing plate 310 and the second opening / closing plate 320 may have a second direction (Y in FIG. 1) perpendicular to the first direction (X in FIG. 1) on the same plane. ), Thereby allowing cooling air to be supplied to the plurality of groups A, B, C in more various combinations. For example, when the width of the pair of first connecting portions 316 of FIG. 3 along the second direction (Y in FIG. 1) is increased, the first opening / closing plate 310 in the second direction (Y in FIG. 1) is increased. The movement of may reduce the overall size of the first opening 314 of FIG. 3. On the contrary, when the pair of first connection portions 316 of FIG. 3 are small, when the first opening / closing plate 310 moves in the second direction (Y in FIG. 1), a predetermined amount of cooling air is supplied to the battery cells (FIG. 1). 200).

Referring to FIG. 12, the second opening / closing plate 320 is positioned on an upper surface of the first opening / closing plate 310, and the first opening / closing plate 310 is along the first direction X at both ends of the first opening / closing plate 310. It includes a pair of extended guide portion 318. The pair of guide parts 318 may protrude in the third direction Z from the upper surface of the first opening / closing plate 310.

Meanwhile, as described above, the first opening / closing plate 310 and the second opening / closing plate 320 may move along the first direction X. In this case, the pair of guide parts 318 may be the second opening / closing plate. When the movement of the 320 is prevented from being separated, the movement of the second opening and closing plate 320 may be guided. In addition, the pair of guide parts 318 may be connected to the motor M1 to receive power to move the first opening / closing plate 310 in the first direction X by the driving of the motor M1.

The first opening and closing plate 310 may further include a first guide rail 319 protruding from a lower surface opposite to the upper surface. The first guide rail 319 extends along the second direction Y at one edge of the first opening / closing plate 310 and may protrude in a direction opposite to the third direction Z. Therefore, when the second opening and closing plate 320 moves in the direction parallel to the first direction X, the movement of the second opening and closing plate 320 is not prevented.

The first guide rail 319 may be connected to the motor M2 to allow the first opening and closing plate 310 to move in the second direction Y by driving the motor M2. At this time, since the movement in the second direction Y is limited by the pair of guide parts 318, the second opening and closing plate 320 moves in the second direction Y. The second opening and closing plate 320 may also be moved together with the first opening and closing plate 310.

The second opening / closing plate 320 may include a pair of second guide rails 328 having a shape similar to the pair of guide parts 318. The outer surface of the second guide rail 328 may be in contact with the inner surface of the guide portion 318, the height of the second guide rail 328 may be higher than the height of the guide portion 318. Therefore, the driving force of the motor M3 is transmitted to the second guide rail 328, so that the second opening / closing plate 320 may move along the first direction X separately from the first opening / closing plate 310.

Meanwhile, although FIG. 12 illustrates an example in which power of the motors M1, M2, and M3 is directly transmitted to the first opening / closing plate 310 and the second opening / closing plate 320, the present invention is not limited thereto. The first open / close plate 310 and the second open / close plate 320 may receive power from the motors M1, M2, and M3 by a driving wire, a spiral shaft, or the like.

Referring to FIG. 13, the battery pack 10B may include a housing 100, a plurality of battery cells 200 disposed in the housing 100, and a distribution plate 300 that distributes cooling air to the plurality of battery cells 200. ), And a roller R disposed at one side of the inside of the housing 100.

The housing 100 and the battery cell 200 are the same as described above, and thus will not be repeatedly described.

The distribution plate 300 may have a flexible property, whereby when the plurality of battery cells 200 are out of the region where the plurality of battery cells 200 are disposed, the distribution plate 300 may be wound around the roller R or bent along the shape of the roller R. have. To this end, a space for accommodating the roller R may be disposed at one side of the housing 100. Therefore, the battery pack 10B can be prevented from becoming too long and have a compact shape.

Although the above description has been made with reference to the exemplary embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

According to an embodiment of the present invention, it is possible to minimize the temperature deviation between the battery cells, it is possible to apply the embodiments of the present invention to various industrial fields using a battery pack as an energy source in addition to a hybrid vehicle, an electric vehicle.

Claims

A housing including a cooling air inlet and an outlet;

A plurality of battery cells disposed in the housing, spaced apart from each other along a first direction, and belonging to different groups; And

A distribution plate positioned above or below the plurality of battery cells and distributing the cooling air to the plurality of battery cells;

The distribution plate may include a first opening and closing plate including first openings and a second opening and closing plate including second openings and at least partially overlapping the first opening and closing plate,

The first opening and closing plate and the second opening and closing plate has a different shape from each other, and move in a direction parallel to the first direction respectively to distribute the cooling air for each of the groups independently.
The method of claim 1,

The length of the first opening and closing plate along the first direction is longer than the length of the second opening and closing plate along the first direction.
The method of claim 1,

The first opening and closing plate may include a plurality of first ribs between both sides of the first opening and closing plate and the first openings, and at least one of the first ribs is wider than the width of the remaining first ribs. Battery pack.
The method of claim 3,

The width of the wide rib along the first direction is equal to the sum of the width of any one of the remaining first ribs and the width of any one of the first openings.
The method of claim 3,

The plurality of groups each including N battery cells,

The wide rib is a first rib positioned in the N-th position from one side of the first opening and closing plate of the first rib.
The method of claim 3,

At least one of the second openings is a wide opening larger than the width of the remaining second openings.
The method of claim 6,

The width of the wide opening along the first direction is equal to the sum of the width of the wide rib along the first direction and the width of the pair of first openings disposed on both sides of the wide rib.
The method of claim 6,

And a width of each of the second openings and the first openings except for the wide openings is equal to a distance between two adjacent battery cells of the plurality of battery cells.
The method of claim 3,

The second opening and closing plate may include second ribs between the second openings, and each of the widths of the remaining first ribs and the widths of the second ribs may be each of the plurality of battery cells along the first direction. Battery pack equal to the thickness of the.
The method of claim 1,

At least one of the first opening and closing plate and the second opening and closing plate moves in a second direction perpendicular to the first direction on the same plane.
The method of claim 1,

A measuring unit measuring a temperature of the plurality of battery cells;

A driving unit driving the first opening and closing plate and the second opening and closing plate; And

And a controller for controlling the operation of the driving unit according to the temperature information measured by the measuring unit.
The method of claim 1,

The second opening and closing plate is located on the upper surface of the first opening and closing plate,

A battery pack for guiding the movement of the second opening and closing plate to a pair of guide parts extending in the first direction on both ends of the first opening and closing plate protruding from the upper surface.
A housing including a cooling air inlet and an outlet;

A plurality of battery cells disposed in the housing, spaced apart from each other along a first direction, and belonging to different groups; And

A distribution plate positioned above or below the plurality of battery cells and separately distributing the cooling air for each of the groups;

The distribution plate may include a first opening and closing plate and a second opening and closing plate having different shapes from each other and at least partially overlapping in a vertical direction.

The first opening and closing plate includes a plurality of first ribs and a plurality of first openings between the plurality of first ribs, wherein at least one of the first ribs is wider than a width of the remaining first ribs. Liv,

The second opening / closing plate may include a plurality of second ribs and a plurality of second openings between the plurality of second ribs, at least one of the second openings being larger than a width of the remaining second openings. Battery pack with wide openings.
The method of claim 13,

The battery pack of the first opening and closing plate and the second opening and closing plate to move in the first direction respectively.
The method of claim 13,

The second opening and closing plate is located on the upper surface of the first opening and closing plate,

And the first opening and closing plate moves along a second direction perpendicular to the first direction on the same plane.
The method of claim 13,

A measuring unit measuring a temperature of the plurality of battery cells;

A driving unit driving the first opening / closing plate and the second opening / closing plate; And

And a controller for controlling the operation of the driving unit according to the temperature information measured by the measuring unit.
The method of claim 13,

The width of the wide rib along the first direction is equal to the sum of the width of any one of the remaining first ribs and the width of any one of the first openings.
The method of claim 13,

The width of the wide opening along the first direction is equal to the sum of the width of the wide rib along the first direction and the width of the pair of first openings disposed on both sides of the wide rib, respectively.
The method of claim 13,

And a width of each of the second openings and the first openings except for the wide openings is equal to a distance between two adjacent battery cells of the plurality of battery cells.
The method of claim 13,

Each of the widths of the remaining first ribs and the widths of the second ribs except the wide ribs is equal to a thickness of each of the plurality of battery cells along the first direction.