KR102296127B1 - Battery pack - Google Patents

Abstract

The present invention discloses a battery pack. The battery pack includes a battery cell, a cooling member having a heat absorbing part disposed in a central region along a longitudinal direction of the battery cell, and a heating member disposed in both end regions, and a cell holder for accommodating the battery cell and the cooling member together, One side of the cell holder includes a cell holder having a contact surface forming an elastic pressure contact with the cooling member. According to the present invention, there is provided a battery pack with improved durability in which the heat dissipation performance is improved and the heat dissipation performance can be maintained over time.

Description

battery pack {Battery pack}

The present invention relates to a battery pack.

In general, a secondary battery is a battery that can be charged and discharged, unlike a primary battery that cannot be charged. Secondary batteries are used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, uninterruptible power supply, etc. It is also used in the form of a module bundled as a unit by connecting the batteries of

Small mobile devices such as cell phones can be operated for a certain period of time with the output and capacity of a single battery. A module type including a battery is preferred, and the output voltage or output current can be increased according to the number of built-in batteries.

One embodiment of the present invention includes a battery pack with improved durability in which the heat dissipation performance of the battery pack is improved and the heat dissipation performance of the battery pack can be maintained over time.

In order to solve the above problems and other problems, the battery pack of the present invention,

battery cell;

a cooling member having a heat absorbing part disposed in a central region along the length direction of the battery cell and a heat generating part disposed in both end regions; and

A cell holder for accommodating the battery cell and the cooling member together, one side of the cell holder includes a cell holder having a contact surface forming elastic pressure contact with the cooling member.

For example, the cell holder,

and a cell accommodating part for accommodating the battery cell, and an accommodating groove for accommodating the cooling member,

The accommodating groove may be formed in a valley region between the cell accommodating portions adjacent to each other.

For example, the cell holder,

It includes first and second holders coupled to face each other along the longitudinal direction of the battery cell,

Cell accommodating portions respectively formed in the first and second holders are spatially connected to each other to accommodate the same battery cell,

The accommodating grooves respectively formed in the first and second holders may be spatially separated from each other to accommodate different cooling members.

For example, the receiving groove may be formed as a space between a blocking wall formed in a central region of the cell holder and an assembly opening formed in both end regions of the cell holder along a longitudinal direction of the battery cell.

For example, the first and second holders may be disposed to face each other so that the blocking walls are adjacent to each other.

For example, the cooling member may be elastically biased toward the blocking wall.

For example, the contact surface may be formed on an inner wall of the accommodating groove between both end regions and a central region of the cell holder.

For example, the contact surface may have a spatial gradient between the innermost end close to the both end regions of the cell holder and the outermost end close to the central region.

For example, the contact surface may include an inclined surface inclined outward from the innermost end to the outermost end.

For example, the contact surfaces may be formed in pairs on both sides of the receiving groove.

For example, the cooling member,

a body portion including the heat absorbing portion and the heat dissipating portion at one end and the other end along the longitudinal direction; and

It may include an elastic piece extending to branch from the body portion.

For example, the heat absorbing part. disposed inside the cell holder,

At least a portion of the heating part may be exposed to the outside of the cell holder.

For example, a cushioning member may be formed on the outer periphery of the heat absorbing part and extending along the longitudinal direction of the battery cell while surrounding the heat absorbing part.

For example, the elastic piece. It may be elastically biased toward the outside so as to move away from the main body.

For example, the elastic piece,

It may include a connection part at one end connected to the body part, and a contact part at the other end which is elastically pressed into contact with the contact surface.

For example, the contact surface has a spatial gradient between an innermost end close to the opposite end region of the cell holder and an outermost end close to the central region,

The connecting portion may provide an elastic hinge to elastically bias the opposite contact portion toward the outermost end of the contact surface.

For example, the elastic piece may have a spatial gradient from a connection portion close to the central region of the cell holder toward a contact portion close to both end regions.

For example, the elastic piece may have an inclination toward the outside from the connecting portion to the contact portion.

For example, the elastic piece and the contact surface may form a pressure contact with each other, and may have a gradient or inclination in opposite directions.

According to the present invention, the heat dissipation performance of the battery pack is improved by fixing the cooling member so that the heat absorbing part of the cooling member and the central region of the battery cell are aligned with each other, while the heat dissipation performance of the battery pack is improved over time by fixing the position of the cooling member by the elastic bias. Provided is a battery pack with improved durability capable of preventing the position of the cooling member from moving while the binding force on the cooling member is weakened or from deteriorating the heat dissipation performance of the battery pack out of the central region of the battery cell.

1 and 2 are exploded perspective views of a battery pack according to an embodiment of the present invention, in which different exploded perspective views showing the assembly of the battery cell and the assembly of the cooling member are shown.
3 is a view showing the arrangement of the battery cell and the cooling member is shown.
4 is a view showing an assembly state of the cell holder and the cooling member shown in FIG. 2 is shown.
5 is a perspective view cut along the line VV of FIG. 2 .
FIG. 6 is a perspective view of the cooling member shown in FIG. 4 .
7 shows a battery pack according to another embodiment of the present invention.

Hereinafter, a battery pack according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2 are exploded perspective views of a battery pack according to an embodiment of the present invention, in which different exploded perspective views showing the assembly of the battery cell and the assembly of the cooling member are shown. 3 is a view showing the arrangement of the battery cell and the cooling member is shown.

A battery pack according to an embodiment of the present invention includes a plurality of battery cells 10 , a cooling member 20 for cooling the battery cells 10 , and a cell accommodating part for accommodating the battery cells 10 ( 101 ) and a cell holder 100 in which a receiving groove 102 for accommodating the cooling member 20 is formed together.

The cell holder 100 may include first and second holders 110 and 120 coupled to face each other along the longitudinal direction of the battery cell 10 . The cell holder 100 may provide a cell accommodating part 101 capable of accommodating the full length of the battery cell 10 by coupling the first and second holders 110 and 120 respectively formed separately. The cell accommodating parts 101 of the first and second holders 110 and 120 may be connected to each other to provide the cell accommodating part 101 corresponding to the full length of the battery cell 10 . For this, the first , the cell receiving portions 101 of the second holders 110 and 120 may be spatially connected to each other along the longitudinal direction of the battery cell 10 .

In one embodiment of the present invention, the entire cell holder 100 and the battery cell 10 including the first and second holders 110 and 120 may be formed to have substantially corresponding lengths, and each cell holder ( The both end areas PE or the central area PC of 100 and the both end areas PE or the central area PC of the battery cell 10 may refer to substantially the same area. In the present specification, for convenience of understanding, the same reference numerals are given to the both end areas PE of the cell holder 100 and the both end areas PE of the battery cell 10, and the central area of the cell holder 100 ( PC) and the central area PC of the battery cell 10 will be assigned the same reference numerals. However, the technical scope of the present invention is not limited thereto, and in another embodiment of the present invention, the opposite end area PE or the central area PC of the cell holder 100 and the both end areas of the battery cell 10 ( PE) or the central region PC may be formed in different regions.

In this specification, the both ends area PE of the battery cell 10 does not mean only both ends of the battery cell 10 , but includes both ends of the battery cell 10 along the longitudinal direction of the battery cell 10 . It can be used in an inclusive sense including regions close to both ends. In addition, the central region PC of the battery cell 10 does not mean only the center of the battery cell 10 , but includes the center of the battery cell 10 in the longitudinal direction of the battery cell 10 . It can be used in an inclusive sense including a region close to the center. As will be described later, the cooling member 20 of the present invention may include a heat absorbing part disposed in the central region PC along the longitudinal direction of the battery cell 10 and a heat generating part disposed in both end regions PE. In this case, it may mean that the heat absorbing part of the cooling member 20 is disposed in a region closer to the center of the battery cell 10 rather than both ends of the battery cell 10 in the longitudinal direction of the battery cell 10 , , it may mean that the heating part of the cooling member 20 is disposed in a region closer to both ends of the battery cell 10 rather than the center of the battery cell 10 in the longitudinal direction of the battery cell 10 .

Similarly, in the present specification, the both ends area PE of the cell holder 100 does not mean only both ends of the cell holder 100 , but includes both ends of the cell holder 100 and both ends of the cell holder 100 . It can be used in an inclusive sense including a region close to . In addition, the central region PC of the cell holder 100 does not mean only the center of the cell holder 100 , but includes the center of the cell holder 100 and is close to the center of the cell holder 100 . It can be used in an inclusive sense including a region.

Both ends of the battery cell 10 may be exposed toward the outside of the cell holder 100 in the area PE of both ends of the cell holder 100 , and the electricity between the different battery cells 10 through the exposed both ends. A direct connection can be made. A plurality of battery cells 10 accommodated in the cell holder 100 may be connected in series with the same polarity or may be connected in parallel with opposite polarities, and for this purpose, adjacent battery cells 10 are arranged in the same orientation. may be, or they may be arranged in an orientation that is reversed so that both ends thereof are turned over.

In one embodiment of the present invention, the cell accommodating part 101 may have a circular cross-section corresponding to the cylindrical shape of the battery cell 10 , and may be formed in plurality to correspond to the number of the battery cells 10 . have. The plurality of cell accommodating units 101 may be arranged in a matrix pattern in rows and columns, and a receiving groove for accommodating the cooling member 20 is provided in a valley region between the cell accommodating units 101 arranged to be adjacent to each other. 102 may be formed. For example, the accommodating groove 102 may be formed in a valley area between four cell accommodating parts 101 arranged adjacent to each other along the column direction and the row direction, and the neighboring cell accommodating part 101 . It is formed at a position spaced apart by an equal distance from the battery cell 10 , thereby providing equal heat dissipation performance to the neighboring battery cells 10 .

4 is a view showing an assembly state of the cell holder and the cooling member shown in FIG. 2 is shown. 5 is a perspective view taken along the line V-V of FIG. 2 .

2, 4 and 5 together, the receiving groove 102 is formed in the central region PC of the cell holder 100 from the assembly opening 103 formed in the both end regions PE of the cell holder 100 . ) may be defined as a space between the blocking wall 105 formed in the . The accommodating groove 102 may be formed in the first and second holders 110 and 120, respectively, and the cooling member 20 is individually formed in the accommodating groove 102 of the first and second holders 110 and 120, respectively. can be accepted. That is, the accommodating groove 102 of the first and second holders 110 and 120 is different from the cell accommodating part 101 of the first and second holders 110 and 120, and the first and second holders 110 and 120 are coupled to each other. They are not connected to each other by the , and can be spatially isolated from each other by the blocking wall 105 . In this case, the first and second holders 110 and 120 may be disposed so that the blocking walls 105 face each other.

A cooling member 20 is assembled in the receiving groove 102 . With respect to the assembly of the cooling member 20 , the cooling member 20 connects the blocking wall 105 of the central region PC from the assembly opening 103 formed in the both end regions PE of the cell holder 100 . It is assembled by sliding toward the barrier wall 105 , and the position can be fixed in an elastically biased state. For example, the cooling members 20 different from each other with respect to the assembly openings 103 of the first and second holders 110 and 120 may be assembled in opposite directions, and disposed adjacent to each other in the blocking wall 105 region. can be As will be described later, in the blocking wall 105 region, heat absorbing portions on one end 20a side of different cooling members 20 may be disposed adjacent to each other, and heat absorption on one end 20a side of different cooling members 20 . Effective cooling of the central region PC of the battery cell 10 can be achieved in the additionally concentrated region of the blocking wall 105 , that is, the central region PC of the cell holder 100 .

The blocking wall 105 may provide an alignment surface for the cooling member 20 , and more specifically, the area of the heat absorbing part on the one end 20a side of the cooling member 20 is defined as the central region of the battery cell 10 . (PC) position can be aligned. As will be described later, the heat absorbing part on the one end 20a side of the cooling member 20 may absorb the heat of the battery cell 10 in the form of heat of vaporization accompanying the phase change of the working fluid, and the other end of the cooling member 20 . (20b) The side heating unit may dissipate heat of the battery cell 10 in the form of heat of condensation. At this time, the cooling member 20 absorbs heat from the central region PC of the battery cell 10 and radiates heat from both end regions PE of the battery cell 10 , so that it is relatively spaced apart from the external atmosphere to generate heat. It is possible to prevent heat from accumulating in the central region PC of the battery cell 10 where emission may be restricted, and heat can be released through the external atmosphere in the both end regions PE of the battery cell 10 . .

The cell holder 100 may be provided with a contact surface S forming a pressure contact with a portion of the cooling member 20 (more specifically, the elastic piece T). The contact surface S may support the cooling member 20 to elastically bias the cooling member 20 toward the blocking wall 105 . The contact surface S is formed between the both end regions PE and the central region PC of the cell holder 100, and the innermost end SI close to the both end regions PE and the innermost region PC close to the central region PC. There may be a spatial gradient between the outer ends SO. In one embodiment of the present invention, the contact surface (S) may include an inclined surface inclined outwardly from the innermost end (SI) toward the outermost end (SO). As will be described later, the elastic piece T of the cooling member 20 may be in press contact with the contact surface S.

In the embodiment of the present invention shown in FIG. 5 , the contact surface S may be formed on the inner wall of the accommodating groove 102 , and may be formed in pairs at positions facing each other of the accommodating groove 102 . More specifically, the contact surface S is formed between the assembling opening 103 formed in the both end regions PE of the cell holder 100 and the blocking wall 105 formed in the central region PC of the cell holder 100 . It may be formed on the inner wall of the receiving groove 102 defined as a space, for example, the receiving groove 102 is connected with the outermost end SO and the innermost end SI of the contact surface S, The contact surface S may be formed with different widths before and after each other. The cross-sectional shape of the accommodating groove 102 may be changed before and after the contact surface S. For example, from the assembly opening 103 formed in the both end regions PE of the cell holder 100 to the contact surface S It may be formed in a generally circular cross-section, and from the blocking wall 105 formed in the central region PC of the cell holder 100 to the contact surface S has a cross-sectional shape including key holes on both sides around the circular cross-section. can be formed. The contact surface (S) is formed on the inner wall of the receiving groove (102), so that a part (more specifically, the elastic piece T) of the cooling member (20) slidingly assembled through the receiving groove (102) naturally becomes the contact surface (S). can be guided.

FIG. 6 is a perspective view of the cooling member shown in FIG. 4 .

4 and 6 together, the cooling member 20 includes a main body B extending in parallel in the longitudinal direction of the battery cell 10, and an elastic piece extending to branch from the main body B. (T) may be included. The body portion B may be formed in an elongate shape extending in the longitudinal direction of the battery cell 10 , and may include a heat absorbing portion and a heat generating portion respectively formed on one end 20a side and the other end 20b side. Here, the fact that the heat absorbing part and the heat generating part are formed on the one end 20a side and the other end 20b side of the body part B means that the regions of the heat absorbing part and the heat generating part are at one end and the other end according to the specific design of the cooling member 20. It is not limited, and may mean that it may be formed in a region close to one end and a region close to the other end, respectively, and may be used to limit the relative regions of the heat absorbing part and the heat generating part. In one embodiment of the present invention, the cooling member 20 rapidly dissipates a large amount of heat by the working fluid reciprocating between the heat absorbing part on the one end 20a side and the heat generating part on the other end 20b side with the phase change. It may include a heat pipe that can be transported.

The main body (B) is a part substantially responsible for heat dissipation of the battery cell 10 , and absorbs heat from the battery cell 10 in the form of heat of vaporization accompanying the phase change of the working fluid to the outside in the form of heat of condensation. By discharging, heat can be transported between the heat absorbing portion on the one end 20a side and the heat generating portion on the other end 20b side along the longitudinal direction of the body portion B.

The heat absorbing part may be disposed in the central region PC of the battery cell 10 . The cooling member 20 may be elastically biased toward the blocking wall 105 to be aligned with the blocking wall 105 . More specifically, the heat absorbing portion formed on the one end 20a side of the cooling member 20 is blocked. It may be aligned with the central region PC of the battery cell 10 by the wall 105 . Since the cooling member 20 is assembled so that the heat absorbing part on the one end 20a side is elastically biased toward the blocking wall 105 , the original position of the heat absorbing part can be defined by the blocking wall 105 , As long as the area of the wall 105 is maintained, the heat sink can effectively cool the battery cell 10 in the central area PC of the battery cell 10 without leaving its position. The heat absorbing unit may absorb heat in the central region PC of the battery cell 10 that is spaced apart from the external atmosphere in the longitudinal direction of the battery cell 10 to limit heat emission, and the heat absorbed by the heat absorbing unit The cooling member 20 adjacent to the external atmosphere may be discharged to the external atmosphere through the heat generating unit on the other end 20b side.

A buffer member 31 may be formed on the outer periphery of the heat absorbing part. The buffer member 31 is formed to surround the outer periphery of the heat absorbing part, and may serve to reduce thermal resistance between the heat absorbing part and the inner wall of the accommodating groove 102 (or the inner wall of the cell holder 100 ). For example, the buffer member 31 removes a gap between the heat absorbing part and the inner wall of the receiving groove 102 (or the inner wall of the cell holder 100) so that an air layer is not interposed therebetween, and the heat absorbing part and the cell holder 100 ), thereby reducing thermal resistance on the heat transfer path from the battery cell 10 to the heat absorbing part via the cell holder 100 and allowing the heat of the battery cell 10 to be quickly transferred to the heat absorbing part. For example, the buffer member 31 may be formed in a tube shape so as to sufficiently surround the heat absorption portion in the longitudinal direction of the cooling member 20 while surrounding the outer periphery of the heat absorption portion, for example, a rubber tube is provided. can be Here, when the buffer member 31 is formed to surround the heat absorbing part, it may mean that the buffer member 31 is formed to surround at least a portion of the heat absorbing part. In another embodiment of the present invention, the buffer member 31 may be formed in a region close to the heat absorbing part so as to be thermally connected to the heat absorbing part, that is, in a region relatively close to the one end 20a side of the cooling member 20. have.

The heating part may be disposed in both end regions PE of the battery cell 10 . As the heat absorbing portion on the one end 20a side of the cooling member 20 is aligned with the central region PC of the battery cell 10, the heat absorbing portion on the other end 20b side of the cooling member 20 is located at both ends of the battery cell 10 ( PE). In one embodiment of the present invention, the heating part may be disposed on both end regions PE of the cell holder 100 , and at least a portion of the heating part may be exposed from the cell holder 100 to the outside. The heating part is a location for dissipating heat transferred from the battery cell 10 toward the outside atmosphere, and may more effectively dissipate heat from the outside rather than the inside of the cell holder 100 . However, since the size of the entire battery pack increases as much as the length at which the heating part is exposed from the outside of the cell holder 100 , there is a problem in that energy density is lowered compared to the size of the battery pack, so that a part of the heating part is part of the cell holder 100 . ), the exposed length may be adjusted in consideration of the size of the battery pack.

In one embodiment of the present invention, the heating part may be formed in a region close to the other end of the cooling member 20 opposite to the heat absorbing part on the one end 20a side, and the cooling member 20 at the other end of the cooling member 20 ) A sealing member 32 may be formed to surround it. The sealing member 32 may block an intrusion path of moisture or external impurities through the gap to prevent moisture or external impurities from penetrating through the gap between the cooling member 20 and the assembly opening 103 . For example, the sealing member 32 may be provided in the form of a tube extending to a predetermined length in the longitudinal direction of the cooling member 20 while surrounding the cooling member 20 , for example, a rubber tube. can be provided.

The elastic piece T may include a connection part TC connected to the body part B, and a contact part TS extending from the connection part TC to form an extended end. The elastic piece T may be formed in the form of a leaf spring including a connecting portion TC at one end and a contact portion TS at the other end, and may be assembled in an elastically compressed state to exert an elastic restoring force. have. In addition, the elastic piece T may extend in a direction branching from the body portion B, and may be elastically biased toward an outward direction away from the body portion B.

The contact portion TS may be in press contact with the contact surface S of the cell holder 100 to provide an elastic force that tends to push the body portion B toward the blocking wall 105 . For example, the contact portion TS may be in contact with the contact surface S of the cell holder 100 , and may be in contact between the innermost end SI and the outermost end SO of the contact surface S. have.

The connection part TC may provide an elastic hinge to elastically bias the opposite contact part TS toward the outermost end SO of the contact surface S. For example, the connecting portion TC elastically biases the opposite contact portion TS toward the outermost end SO of the contact surface S, thereby deforming the elastic piece T or abrasion of the elastic piece T, etc. Accordingly, even when the effective length that influences the elastic force of the elastic piece T, that is, the shortest distance between the connecting portion TC of one end and the contact portion TS of the other end decreases, the pressure between the contact portion TS and the contact surface S is reduced. It is possible to maintain contact, prevent the flow of the cooling member 20 due to the weakening of the elastic force of the elastic piece T, and fix the cooling member 20 in a fixed position.

The connecting portion TC and the contacting portion TS may form one end and the other end of the elastic piece T, respectively, and the connecting portion TC forms one end close to the central region PC of the cell holder 100 . Alternatively, the contact portion TS may form the other end close to the both end regions PE of the cell holder 100 . The elastic piece T may have a spatial gradient from the connection part TC close to the central region PC to the contact part TS close to the both end regions PE, and from the connection part TC to the contact part TS. As you go, you can form an outward slope. For example, the elastic piece T including the connection part TC of one end and the contact part TS of the other end has a certain inclination angle from the body part B while extending so as to branch from the body part B and in an oblique direction. can be extended to In one embodiment of the present invention, the elastic piece (T) and the contact surface (S) forming a press contact with each other may have a gradient or inclination in opposite directions to each other, and the contact surface ( It is possible to maintain pressurized contact with S).

The elastic piece (T) may be formed in pairs at positions opposite to each other of the body portion (B), and may be in press contact with the contact surface (S) formed in pairs on the inner wall of the receiving groove (102). The pair of elastic pieces (T) may be biased in a direction away from each other toward the pair of contact surfaces (S) formed on the inner wall of the receiving groove (102). With respect to the assembly of the cooling member 20, when the cooling member 20 is slidingly assembled from the assembly opening 103 toward the blocking wall 105, the pair of elastic pieces T of the cooling member 20 is Since they are elastically biased in a direction away from each other, the pair of elastic pieces T can form a pressing contact with the contact surface S, and the cooling member 20 biased by the elastic pieces T is formed by a blocking wall ( 105), while preventing further sliding movement, it can be stably fixed in position.

The elastic piece T may be positioned between the heat absorbing part on the one end 20a side and the heat generating part on the other end 20b side along the longitudinal direction of the body part B. If the elastic piece T is formed on the side of the one end 20a on which the heat absorbing part is formed, the elastic piece T is interposed on the heat transfer path between the heat absorbing part and the cell holder 100 , so that the heat absorbing part is removed from the battery cell 10 . It may impede the flow of heat to the heat absorbing part, and may interfere with the assembly of the cushioning member 31 surrounding the outer periphery of the heat absorbing part. In addition, if the elastic piece T is formed on the other end 20b side where the heating part is formed, the elastic force transmitted through the elastic piece T cannot be effectively transmitted to the one end 20a side of the cooling member 20 and the cooling member It may not be easy to bias the one end 20a of the 20 toward the blocking wall 105 .

In one embodiment of the present invention, the elastic piece (T) and the contact surface (S), which form a pressing contact with each other, have a gradient or inclination in opposite directions to each other, thereby deforming the elastic piece (T), the elastic piece (T) In spite of the temporal change that may cause a weakening of the elastic force, such as wear of the contact surface S, the elastic pressure contact between the elastic piece T and the contact surface S may be maintained. For example, the angle between the elastic piece T and the main body B is increased by the elastic hinge of the connecting portion TC connecting the elastic piece T and the body portion B of the cooling member 20 . The position of the cooling member 20 that is elastically biased toward the blocking wall 105 by the elastic piece T because it is possible to properly maintain the elastic force of the elastic piece T adaptively to changes over time while decreasing or vice versa. can be firmly fixed.

In the present invention, the cooling member 20 is fixed in position based on the elastic pressure contact between the elastic piece T and the contact surface S having a gradient or inclination in opposite directions, and the cooling member 20 and the cell holder 100 ) between each other by an elastic bias, so that the bonding force is not weakened due to physical wear, and the position of the cooling member 20 flows or deviates from the original position according to the weakening of the bonding force, and the heat dissipation of the battery cell 10 It does not cause the problem of lowering efficiency. On the other hand, in a fastening method in which a separate fastening member directly constrains the cooling member 20 to fix the position of the cooling member 20, such as screw fastening or clip fastening, the coupling force is caused by friction and wear over time due to direct constraint. This weakening cannot be avoided, and the position of the cooling member 20 may flow according to the weakening of the bonding force, and may cause a problem that the heat dissipation efficiency of the battery cell 10 is lowered out of the original position.

7 shows a battery pack according to another embodiment of the present invention.

The battery pack shown in FIG. 7 further includes a cover 200 for accommodating the cell holder 100 to which the battery cell 10 and the cooling member 20 are assembled, as shown in FIGS. 1 and 2 . can do. More specifically, the cover 200 includes first and second covers 210 and 220 that are coupled in opposite directions with the battery cell 10 and the cooling member 20 assembled therebetween with the cell holder 100 interposed therebetween. ) may be included.

Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, this is merely an example, and those of ordinary skill in the art to which the present invention pertains can make various modifications and equivalent other embodiments therefrom. point can be understood.

10: battery cell 20: cooling member
31: cushioning member 32: sealing member
100: cell holder 101: cell receiving part
102: receiving groove 103: assembly opening
105: barrier wall 110: first holder
120: second holder
B: body part T: elastic piece
TC: Connection TS: Contact
S: contact surface SI: innermost end
SO: outermost end PC: central area
PE: both ends area

Claims (19)

battery cell;
a cooling member having a heat absorbing part disposed in a central region along the length direction of the battery cell and a heat generating part disposed in both end regions; and
A cell holder accommodating the battery cell and the cooling member together, one side of the cell holder comprising a cell holder having a contact surface forming elastic pressure contact with the cooling member;
The cell holder,
and a cell accommodating part for accommodating the battery cell, and an accommodating groove for accommodating the cooling member,
The accommodating groove is formed in a valley region between the cell accommodating portions adjacent to each other. delete According to claim 1,
The cell holder,
It includes first and second holders coupled to face each other along the longitudinal direction of the battery cell,
Cell accommodating portions respectively formed in the first and second holders are spatially connected to each other to accommodate the same battery cell,
The accommodating grooves respectively formed in the first and second holders are spatially separated from each other to accommodate different cooling members. 4. The method of claim 3,
The accommodating groove is formed as a space between the blocking wall formed in the central region of the cell holder along the longitudinal direction of the battery cell and the assembly openings formed in both end regions of the cell holder. 5. The method of claim 4,
The first and second holders are disposed to face each other so that the blocking walls are adjacent to each other. 5. The method of claim 4,
The cooling member is elastically biased toward the blocking wall. According to claim 1,
The contact surface is formed on the inner wall of the accommodating groove between both end regions and the central region of the cell holder. 8. The method of claim 7,
The contact surface has a spatial gradient between the innermost end close to the both end regions of the cell holder and the outermost end close to the central region of the cell holder. 9. The method of claim 8,
and the contact surface includes an inclined surface inclined outward from the innermost end to the outermost end. According to claim 1,
The contact surface is a battery pack, characterized in that formed in pairs on both sides of the receiving groove. According to claim 1,
The cooling member,
a body portion including the heat absorbing portion and the heat dissipating portion at one end and the other end along the longitudinal direction; and
and an elastic piece extending to branch from the main body. 12. The method of claim 11,
The heat absorbing part. disposed inside the cell holder,
At least a part of the heating part is exposed to the outside of the cell holder. 12. The method of claim 11,
A battery pack, characterized in that the cushioning member is formed on the outer periphery of the heat absorbing portion and extending along the longitudinal direction of the battery cell while surrounding the heat absorbing portion. 12. The method of claim 11,
The elastic piece. The battery pack, characterized in that it is elastically biased toward the outside so as to move away from the main body. 12. The method of claim 11,
The elastic piece,
A battery pack comprising: a connection part at one end connected to the body part; and a contact part at the other end, which is elastically pressed into contact with the contact surface. 16. The method of claim 15,
the contact surface has a spatial gradient between an innermost end close to the opposite end region of the cell holder and an outermost end close to the central region;
The connecting portion provides an elastic hinge to elastically bias the opposite contact portion toward the outermost end of the contact surface. 16. The method of claim 15,
The elastic piece has a spatial gradient from the connection portion close to the central region of the cell holder toward the contact portion close to the both end regions of the cell holder. 18. The method of claim 17,
The elastic piece, battery pack, characterized in that it has an inclination toward the outside while going from the connecting portion to the contact portion. 18. The method of claim 17,
The elastic piece and the contact surface form a pressure contact with each other, and have a gradient or inclination in opposite directions to each other.

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